WO2023233102A1 - Composition bicomposante thermoconductrice de polymere silyle - Google Patents
Composition bicomposante thermoconductrice de polymere silyle Download PDFInfo
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- WO2023233102A1 WO2023233102A1 PCT/FR2023/050753 FR2023050753W WO2023233102A1 WO 2023233102 A1 WO2023233102 A1 WO 2023233102A1 FR 2023050753 W FR2023050753 W FR 2023050753W WO 2023233102 A1 WO2023233102 A1 WO 2023233102A1
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J201/00—Adhesives based on unspecified macromolecular compounds
- C09J201/02—Adhesives based on unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups
- C09J201/10—Adhesives based on unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups containing hydrolysable silane groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/2805—Compounds having only one group containing active hydrogen
- C08G18/285—Nitrogen containing compounds
- C08G18/2865—Compounds having only one primary or secondary amino group; Ammonia
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4825—Polyethers containing two hydroxy groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/71—Monoisocyanates or monoisothiocyanates
- C08G18/718—Monoisocyanates or monoisothiocyanates containing silicon
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
- C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
- C08G18/7671—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups containing only one alkylene bisphenyl group
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/80—Masked polyisocyanates
- C08G18/8061—Masked polyisocyanates masked with compounds having only one group containing active hydrogen
- C08G18/807—Masked polyisocyanates masked with compounds having only one group containing active hydrogen with nitrogen containing compounds
- C08G18/808—Monoamines
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L101/00—Compositions of unspecified macromolecular compounds
- C08L101/02—Compositions of unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups
- C08L101/10—Compositions of unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups containing hydrolysable silane groups
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J171/00—Adhesives based on polyethers obtained by reactions forming an ether link in the main chain; Adhesives based on derivatives of such polymers
- C09J171/02—Polyalkylene oxides
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
- C09J175/08—Polyurethanes from polyethers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/52—Phosphorus bound to oxygen only
- C08K5/521—Esters of phosphoric acids, e.g. of H3PO4
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/52—Phosphorus bound to oxygen only
- C08K5/521—Esters of phosphoric acids, e.g. of H3PO4
- C08K5/523—Esters of phosphoric acids, e.g. of H3PO4 with hydroxyaryl compounds
Definitions
- the present invention relates to a two-component thermally conductive composition of silylated polymer, as well as its use in particular to improve the lifespan of a battery.
- the present invention also relates to the use of a filler (C) having a specific moisture content, for the crosslinking without addition of free water of a two-component composition of silylated polymer.
- Adhesives and sealants make it possible to assemble (or even join or bond) two substrates which can be chosen from the most diverse materials.
- polymer-based compositions can be used as adhesive and/or sealant in building construction, shipbuilding, or the transportation field (e.g., road, maritime, rail, or aerospace).
- transportation field e.g., road, maritime, rail, or aerospace.
- compositions based on alkoxysilane-terminated polymer have the advantage of being free of isocyanates. These compositions therefore constitute an alternative, preferred from a toxicological point of view, to compositions based on polyurethane with isocyanate endings which are very often found on the adhesives market.
- compositions based on silylated polymer occurs, in the presence of humidity, by hydrolysis of the alkoxysilane groups carried by the polymer, then their condensation to form a siloxane bond (-Si-O—Si—) which unites the polymer chains into a solid three-dimensional network.
- the polymer-based composition have specific properties, in particular in terms of thermal conductivity. Indeed, recharging a battery is generally accompanied by an increase in temperature, it is important to limit said increase as much as possible, which is likely to degrade certain electronic circuits or even reduce the lifespan of the battery. . It is therefore important that the silylated polymer composition has sufficient thermal conductivity to overcome these problems.
- closed assemblies such as batteries do not allow sufficient air (and therefore humidity) to pass for the crosslinking reaction of the silylated polymer to take place.
- a two-component composition comprising on the one hand the silylated polymer to be crosslinked, and on the other hand water.
- the two components of the adhesive are often packaged separately in the two compartments of a two-cartridge.
- the adhesive is then distributed at the time of application to the substrates to be assembled by extrusion of the two components, for example using a two-cartridge gun, and following their homogeneous mixture obtained, for example, by attaching a static mixer to the two-cartridge.
- the reaction of the component comprising the silylated polymer with the component comprising water allows the crosslinking of the silylated polymer.
- the present invention relates to a two-component thermally conductive composition
- a two-component thermally conductive composition comprising:
- composition (A) comprising: o a silylated polymer, and o a rheology agent (r1) chosen from amide waxes and/or o a rheology agent (r2) comprising: ⁇ from 1% to 40% by weight of a bis-urea (a) obtained by reaction of a primary aliphatic amine with a diisocyanate of molar mass less than 500 g/mol, relative to the total weight of the agent rheology (r2), and
- a plasticizer (b) chosen from alkylphthalates, pentaerythritol tetravalerate, alkylsulphonic acid and phenol esters, diisononyl-1,2-cyclohexane dicarboxylate, 3,3 '- [methylenebis(oxymethylene)]bis[heptane], dioctyl carbonate and their mixtures, relative to the total weight of the rheology agent (r2), said rheology agent (r2) being in the form of a suspension of solid particles of bis-urea (a) in a continuous phase of plasticizer (b), and
- a plasticizer (b) chosen from alkylphthalates, pentaerythritol tetravalerate, alkylsulphonic acid and phenol esters, diisononyl-1,2-cyclohexane dicarboxylate, 3,3 '- [methylenebis(oxymethylene)]bis[heptane], dioctyl carbon
- composition (B) comprising: o at least 1% by weight of a filler (C) relative to the total weight of the composition (B), the filler (C) providing at least 0.0025% by weight of humidity relative to the total weight of the composition (B), the composition (A) and/or the composition (B) further comprising at least one thermally conductive filler.
- the present invention also relates to the use of the two-component thermally conductive composition according to the invention as an adhesive and/or sealant.
- the present invention also aims at the use of the two-component thermally conductive composition according to the invention as an adhesive in the field of building construction, in the field of manufacturing means of transport, preferably in the automobile industry, railway, and aerospace, and in the field of shipbuilding.
- the present invention also relates to the use of the thermally conductive two-component composition according to the invention to improve the lifespan of a battery, preferably a rechargeable battery.
- the invention relates to the use of a filler (C) having a moisture content of between 0.05% and 5% by weight, relative to the total weight of the filler (C), for crosslinking without addition of free water to a two-component composition, the two-component composition comprising a composition (A) comprising a silylated polymer, and a composition (B) comprising said filler (C).
- a filler (C) having a moisture content of between 0.05% and 5% by weight, relative to the total weight of the filler (C), for crosslinking without addition of free water to a two-component composition, the two-component composition comprising a composition (A) comprising a silylated polymer, and a composition (B) comprising said filler (C).
- the present invention also relates to an article, in particular a battery, comprising the thermally conductive two-component composition according to the invention.
- the present invention relates to a method of assembling two substrates by bonding, comprising:
- the incorporation of a filler (C) in the composition (B), providing at least 0.0025% by weight of humidity relative to the total weight of the composition (B ), not only makes it possible to improve the mixing of composition (A) with composition (B), and thus to limit processability problems (in particular to limit the deposit of water on the blades of the mixer), but also leads to the rapid crosslinking of the silylated polymer after contact with composition (A), without it being necessary to add (free) water to composition (B).
- the two-component thermally conductive composition according to the invention can not only be easily applied with a manual two-cartridge (without the need for a pneumatic gun), but also limits the risk of leaking, particularly in a non-horizontal position.
- the invention relates to a two-component thermally conductive composition
- a two-component thermally conductive composition comprising:
- composition (A) comprising: o a silylated polymer, and
- composition (B) comprising: o at least 1% by weight of a filler (C) relative to the total weight of the composition (B), the filler (C) providing at least 0.0025% by weight of humidity relative to the total weight of the composition (B), the composition (A) and/or the composition (B) further comprising at least one thermally conductive filler, and the composition (A) and/or the composition (B), preferably the composition (A), further comprising: o a rheology agent (r1) chosen from amide waxes and/or o a rheology agent (r2) comprising:
- ⁇ from 1% to 40% by weight of a bis-urea (a) obtained by reaction of a primary aliphatic amine with a diisocyanate of molar mass less than 500 g/mol, relative to the total weight of the rheology agent (r2), and
- a plasticizer (b) chosen from alkylphthalates, pentaerythritol tetravalerate, alkylsulphonic acid and phenol esters, diisononyl-1,2-cyclohexane dicarboxylate, 3,3 '- [methylenebis(oxymethylene)]bis[heptane], dioctyl carbonate and their mixtures, relative to the total weight of the rheology agent (r2), said rheology agent (r2) being in the form of a suspension of solid particles of bis-urea (a) in a continuous phase of plasticizer (b).
- a plasticizer (b) chosen from alkylphthalates, pentaerythritol tetravalerate, alkylsulphonic acid and phenol esters, diisononyl-1,2-cyclohexane dicarboxylate, 3,3 '- [methylenebis(oxymethylene)]bis[heptane], dioctyl carbonate
- silylated polymer is meant a polymer comprising at least one alkoxysilane group.
- the silylated polymer comprises at least one alkoxysilane group at the end of the polymer.
- the silylated polymer is generally in the form of a more or less viscous liquid.
- the silylated polymer has a viscosity at 23°C ranging from 0.5 to 200 Pa.s, preferably from 5 to 120 Pa.s, more preferably from 15 to 80 Pa.s, even more preferably from 30 to 60 Not.
- the viscosity of the silylated polymer can for example be measured using a Brookfield type method at 23°C and 50% relative humidity (S28 needle).
- the ranges of values are understood to be inclusive.
- the range “between 0% and 25%” includes in particular the values 0% and 25%.
- the silylated polymer comprises at least one, preferably at least two, alkoxysilane groups of formula (I): in which :
- - R 4 represents a linear or branched alkyl radical comprising 1 to 4 carbon atoms, and when p is equal to 2, the R 4 radicals are identical or different
- - R 5 represents a linear or branched alkyl radical comprising 1 to 4 carbon atoms, and when p is equal to 0 or 1, the R 5 radicals are identical or different, two OR 5 groups being able to be engaged in the same cycle
- - p is an integer equal to 0, 1 or 2, preferably equal to 0 or 1.
- the alkoxysilane groups of the silylated polymer are of formula (I) with:
- R 4 and R 5 each represent a methyl radical
- - p is equal to 0 or 1.
- the silylated polymer has a number average molecular mass of between 500 g/mol and 70,000 g/mol, preferably between 1000 g/mol and 60,000 g/mol, more preferably between 2000 g/mol and 50,000 g/mol.
- the molar mass of the polymers can be measured by methods well known to those skilled in the art, for example by NMR or by size exclusion chromatography using polystyrene type standards.
- silylated polymer is of formula (II), (III) or (IV): av) in which:
- R 4 , R 5 and p have the same meaning as in formula (I) described above,
- - P represents a saturated or unsaturated polymeric radical, with a linear or branched open chain, or comprising one or more optionally aromatic rings, optionally comprising one or more heteroatoms, such as oxygen, nitrogen, sulfur and/or silicon, preferably oxygen and/or or nitrogen,
- R 1 represents a divalent hydrocarbon radical comprising from 5 to 15 carbon atoms, saturated or unsaturated, with a linear or branched open chain, or comprising one or more optionally aromatic rings
- R 3 represents a linear or branched divalent alkylene radical comprising from 1 to 6 carbon atoms, preferably from 1 to 3 carbon atoms,
- - X represents a divalent radical chosen from -NH-, -NR 7 - or -S-,
- R 7 represents a linear or branched alkyl radical comprising from 1 to 20 carbon atoms and which may also comprise one or more heteroatoms,
- - f is an integer ranging from 1 to 6, advantageously from 2 to 5, preferably from 2 to 4, even more preferably from 2 to 3.
- the silylated polymer is of formula (II), (III) or (IV) with P representing a polymer radical chosen from polyethers, polycarbonates, polyesters, polyolefins, polyacrylates, polyether polyurethanes, polyester polyurethanes, polyolefin polyurethanes, polyacrylate polyurethanes, polycarbonate polyurethanes, polyether/polyester block polyurethanes, preferably chosen from polyethers, polyurethanes and mixtures thereof, more preferably from polyethers.
- P representing a polymer radical chosen from polyethers, polycarbonates, polyesters, polyolefins, polyacrylates, polyether polyurethanes, polyester polyurethanes, polyolefin polyurethanes, polyacrylate polyurethanes, polycarbonate polyurethanes, polyether/polyester block polyurethanes, preferably chosen from polyethers, polyurethanes and mixtures thereof, more preferably from polyethers.
- the silylated polymer is of formula (IT), (II”), (III’) or (IV’): in which :
- R 1 , R 3 , R 4 , R 5 , X, R 7 and p have the same meaning as in formulas (II), (III) and (IV),
- - R 2 represents a saturated or unsaturated, linear or branched divalent hydrocarbon radical possibly comprising one or more heteroatoms, such as oxygen, nitrogen, sulfur, silicon, - n is an integer, preferably n is such that the number average molecular mass of the silylated polymer is between 500 g/mol and 70,000 g/mol, more preferably between 1000 g/mol and 60,000 g/mol, even more preferably between 2000 g/mol and 50,000 g/mol.
- the radical R 2 comprises one or more heteroatoms
- said heteroatom(s) are not present at the end of chain.
- the free valences of the divalent radical R 2 linked to the neighboring oxygen atoms of the silylated polymer each come from a carbon atom.
- the main chain of the R 2 radical is terminated by a carbon atom at each of the two ends, said carbon atom then having a free valence.
- the silylated polymers are obtained from polyols chosen from polyethers polyols, polyester polyols, polycarbonate polyols, polyacrylate polyols, polysiloxane polyols, polyolefin polyols and mixtures thereof, preferably from diols chosen from polyether diols, polyester diols, polycarbonate diols, polyacrylate diols, polysiloxane diols, polyolefin diols and mixtures thereof, more preferably from polyether diols.
- such diols can be represented by the formula HO-R 2 - OH or H-[O - R 2 ] n -OH, where R 2 has the same meaning as in formulas (IT), (II”), (III') or (IV').
- the radical R 2 can be chosen from the following divalent radicals whose formulas below show the two free valences:
- - q represents an integer such that the molar mass in number of the radical R 2 ranges from 100 g/mol to 48600 g/mol, preferably from 300 g/mol to 18600 g/mol, more preferably from 500 g/mol to 12600 g/mol,
- - r and s represent zero or a non-zero integer such that the number average molar mass of the radical R 2 ranges from 100 g/mol to 48600 g/mol, preferably from 300 g/mol to 18600 g/mol, preferably again from 500 g/mol to 12600 g/mol, it being understood that the sum r+s is different from zero,
- Q 1 represents a linear or branched, saturated or unsaturated divalent aromatic or aliphatic alkylene radical, preferably having from 1 to 18 carbon atoms, more preferably from 1 to 8 carbon atoms,
- Q 2 represents a linear or branched divalent alkylene radical preferably having from 2 to 36 carbon atoms, more preferably from 1 to 8 carbon atoms,
- Q 3 , Q 4 , Q 5 , Q 6 , Q 7 and Q 8 represent, independently of each other, a hydrogen atom or an alkyl, alkenyl or aromatic radical, preferably having 1 to 12 atoms of carbon, preferably from 2 to 12 carbon atoms, more preferably from 2 to 8 carbon atoms.
- R 1 is chosen from the following divalent radicals whose formulas below show the two free valences: a) the divalent radical derived from isophorone diisocyanate (I PDI): b) the divalent radical derived from dicyclohexylmethane diisocyanate (H12MDI): c) divalent radicals derived from the 2,4- and 2,6- isomers of toluene diisocyanate (TDI): d) divalent radicals derived from the 4,4' and 2,4'- isomers of diphenylmethane diisocyanate (MDI): e) the divalent radical derived from hexamethylene diisocyanate (HDI): -(CH 2 ) 6 - f) the divalent radical derived from m-xylylene diisocyanate (m-XDI):
- the silylated polymer is of formula (II”) (preferably with R 3 representing a linear or branched divalent alkylene radical comprising 3 carbon atoms) or (III'), preferably (HT), and the radical R 2 preferably represents a linear or branched divalent alkylene radical comprising from 2 to 4 carbon atoms, more preferably a linear or branched divalent alkylene radical comprising 3 carbon atoms, even more preferably an iso-propylene radical (of formula -CH 2 -CH(CH 3 )-).
- the silylated polymer is a polymer of formula (III’) in which:
- R 5 represents a methyl radical
- polymers of formula (II), (II’) or (II”) can be obtained according to a process described for example in documents EP 2336208 and WO 2009/106699.
- polymers corresponding to formula (II) we can cite:
- polyether of formula (II”) comprising two groups of formula (I) of dimethoxy type (p equal to 1 and R 4 and R 5 represent a methyl group) presenting a number average molar mass of 8889 g/mol where R 3 represents a methyl group;
- polyether of formula (II”) comprising two groups of formula (I) of dimethoxy type (p equal to 1 and R 4 and R 5 represent a methyl group) having a number average molar mass of 14493 g/mol where R 3 represents a methyl group;
- polyurethane comprising two groups of formula (I) of trimethoxy type (p equal to 0 and R 5 represents a methyl group) having a number average molar mass of 15,038 g/mol where R 3 represents an n-propylene group.
- polymers of formula (III) or (III') can be obtained by hydrosilylation of polyether diallyl ether according to a process described for example in document EP 1829928.
- polymers corresponding to formula (III) the following may be cited:
- the polymers of formula (IV) or (IV') can for example be obtained by reaction of polyol(s) with one or more diisocyanate(s) followed by a reaction with aminosilanes or mercaptosilanes.
- a process for preparing polymers of formula (IV) or (IV') is described for example in document EP 2583988. Those skilled in the art will know how to adapt the manufacturing process described in this document in the case of the use of different types of polyols.
- SPUR+® 1050MM (available from MOMENTIVE): polyurethane comprising two groups of formula (I) of trimethoxy type (p equal to 0 and R 5 represents a methyl group) having a number average molar mass of 16393 g/mol where R 3 represents an n-propyl group;
- SPUR+® Y-19116 available from MOMENTIVE: polyurethane comprising two groups of formula (I) of trimethoxy type (p equal to 0 and R 5 represents a methyl group) having a number average molar mass ranging from 15,000 to 17,000 g /mol g/mol where R 3 represents an n-propyl group.
- the content of silylated polymer in composition (A) can range from 3% to 40% by weight relative to the total weight of composition (A), preferably from 5% to 35% by weight, more preferably from 10% to 30% by weight. % by weight, even more preferably from 14% to 28% by weight, in particular from 17% to 22% by weight.
- the total content of rheology agent in composition (A) can range from 0.2% to 15% by weight relative to the total weight of composition (A), preferably from 1% to 10% by weight, more preferably from 1% to 5% by weight.
- the total content of rheology agent in composition (B) can range from 0.2% to 15% by weight relative to the total weight of composition (B), preferably from 1% to 10% by weight, more preferably from 1% to 5% by weight.
- composition (A) and/or composition (B) comprises a rheology agent (r2).
- the rheology agent (r2) is the only rheology agent in composition (A) and/or composition (B).
- composition (A) comprises a rheology agent (r2).
- r2 is the only rheology agent in composition (A).
- composition (A) only comprises a rheology agent, preferably a rheology agent (r2).
- rheology agent (r2) is the only rheology agent in composition (A).
- amide waxes is meant waxes comprising one or more compounds having at least one amide group.
- amide waxes can be obtained from fatty acid(s) (for example ricinoleic acid) and (di)amine(s).
- Amide waxes are preferably micronized, that is to say they have an average particle size of less than 1 mm.
- the amide waxes have an average particle size of less than 500 pm, preferably less than 100 pm, more preferably less than 10 pm.
- the average particle size advantageously corresponds to the particle size d50, that is to say the maximum size of 50% of the smallest particles by volume, and can be measured with a particle size analyzer, in particular by laser diffraction on a MALVERN type device. (for example according to the NF ISO 13320 standard).
- Amide wax type rheology agents are generally heat-activatable, that is to say a temperature higher than room temperature (23°C) may be necessary to activate it (in particular, activate its rheological properties) during the preparation of the composition according to the invention.
- the activation temperature depends on the rheology agent.
- the activation temperature of the rheology agent (r1) is less than 80°C, more preferably less than 65°C, even more preferably less than 55°C.
- amide waxes examples include CRAYVALLAC® SLX or CRAYVALLAC® SLT marketed by Arkema, or THIXATROL® AS8053 or THIXATROL® MAX (EC No.: 432-430-3) which are available from ELEMENTIS.
- the rheology agent (r2) is such that the bis-urea (a) is obtained by reaction of an n-alkylamine (a1) comprising from 1 to 22 carbon atoms, preferably n-butylamine, with a diisocyanate (a2) of formula (V):
- diphenylmethylene 4,2'-diisocyanate or 4,2'-MDI
- diphenylmethylene 4,4'-diisocyanate or 4,4'-MDI
- the diisocyanate (a2) is of formula (V) in which R 6 is the divalent radical derived from 4,2'-MDI or from 4,4'-MDI, preferably from 4,4'-MDI.
- bis-urea (a) is obtained by reaction of n-butylamine with a diisocyanate (a2) of formula (V) in which R 6 is the divalent radical derived 4,2'-MDI or 4,4'-MDI, preferably 4,4'-MDI.
- the plasticizer (b) is chosen from alkylphthalates, pentaerythritol tetravalerate, alkylsulphonic acid and phenol esters, diisononyl-1,2-cyclohexane dicarboxylate, 3,3'-
- Alkyl phthalates are preferably formed from the group consisting of diisodecyl phthalate (DIDP), di(2-propylheptyl) phthalate and mixtures thereof.
- DIDP diisodecyl phthalate
- D(2-propylheptyl) phthalate di(2-propylheptyl) phthalate
- dioctyl carbonate (EC number: 434-850-2) is available from BASF.
- the rheology agent (r2) is such that the plasticizer (b) is chosen from alkylphthalates, preferably the plasticizer (b) is chosen from diisodecyl phthalate, di(2-propylheptyl) phthalate and mixtures thereof, more preferably the plasticizer (b) is diisodecyl phthalate.
- the rheology agent (r2) consists of:
- a bis-urea obtained by reaction of a primary aliphatic amine with a diisocyanate of molar mass less than 500 g/mol, relative to the total weight of the agent rheology (r2), and
- a plasticizer (b) chosen from alkylphthalates, pentaerythritol tetravalerate, alkylsulphonic acid and phenol esters, diisononyl-1,2-cyclohexane dicarboxylate, 3,3 '- [methylenebis(oxymethylene)]bis[heptane], dioctyl carbonate and their mixtures, relative to the total weight of the rheology agent (r2), said rheology agent (r2) being in the form of a suspension of solid particles of bis-urea (a) in a continuous phase of plasticizer (b), and the bis-urea (a) and the plasticizer (b) being as described above, including the embodiments .
- a plasticizer (b) chosen from alkylphthalates, pentaerythritol tetravalerate, alkylsulphonic acid and phenol esters, diisononyl-1,2-cyclohexane dicarboxylate, 3,3
- the rheology agent (r2) comprises, and preferably consists of, 5 to 30% by weight of the bis-urea (a) and 70 to 95% by weight of the plasticizer (b), the percentages being relative to the total weight of said rheology agent (r2).
- the bis-urea (a) and the plasticizer (b) are as described above, including the embodiments.
- the rheology agent (r2) used in the two-component thermally conductive composition according to the invention can be prepared according to the process described below.
- the reaction of the primary aliphatic amine with the diisocyanate is very exothermic.
- the primary aliphatic amine and the diisocyanate are each dissolved in the plasticizer (b), prior to their reaction, said plasticizer (b) thus serving to evacuate the heat formed by the reaction.
- the two solutions in the plasticizer (b) of the primary aliphatic amine and the diisocyanate are each advantageously introduced into a reactor by injectors, under a pressure of 40 to 200 bar, preferably of 80 to 120 bar, the two solutions thus being brought into contact in the state of sprayed liquid.
- the quantities of reagents preferably correspond to a ratio (number of moles of primary aliphatic amine) / (number of moles of diisocyanate) of approximately 2.
- Bis-urea is produced by the reaction in the form of solid particles dispersed in a continuous phase of plasticizer b), the Brookfield viscosity of the corresponding suspension, measured at a temperature of 23°C, is generally between 1 and 50 Pa.s, preferably between 10 and 25 Pa.s.
- the charge (C) of the composition (B) comprises residual moisture making it possible to hydrolyze the alkoxysilyl groups of the silylated polymer, which advantageously leads to crosslinking of the silylated polymer, without the need to add water to the composition ( B).
- the charge (C) is different from the thermally conductive charge.
- composition (B) advantageously makes it possible to obtain a more homogeneous thermally conductive two-component composition.
- composition (A) being hydrophobic, in particular by the presence of the silylated polymer, its mixing with composition (B) is therefore facilitated when water is provided by the filler (C).
- the filler (C) provides at least 0.005% by weight of humidity relative to the total weight of the composition (B), preferably at least 0.010% by weight, more preferably at least 0.015% by weight.
- the filler (C) provides between 0.0025% and 1% by weight of humidity relative to the total weight of the composition (B), preferably between 0.005% and 0.8% by weight, more preferably between 0.010 % and 0.5% by weight, even more preferably between 0.015% and 0.2% by weight.
- the moisture content of the filler (C) is between 0.05% and 5% by weight relative to the total weight of the filler (C), preferably between 0.1% and 3% by weight, more preferably between 0.10% and 2% by weight.
- the moisture content of a load (C) can be determined according to the Karl Fisher method by determining the equivalence point electrometrically.
- the moisture content can be determined by following the protocol described in Example 1 below.
- the average particle size of the filler (C) can range from 10 nm to 400 pm, preferably from 20 nm to 100 pm, more preferably from 30 nm to 50 pm.
- the average particle size advantageously corresponds to the particle size d50, that is to say the maximum size of 50% of the smallest particles by volume, and can be measured with a particle size analyzer, in particular by laser diffraction on a MALVERN type device. (for example according to the NF ISO 13320 standard).
- the filler (C) is chosen from clays, talc, kaolins, gypsum, carbonate fillers, zeolites, expandable graphite and their mixtures.
- the filler (C) is chosen from carbonate fillers, zeolites, expandable graphite and their mixtures, more preferably from carbonate fillers, zeolites and their mixtures.
- the carbonated fillers are formed by the group consisting of alkali or alkaline earth metal carbonates and their mixtures, preferably the carbonated fillers are calcium carbonate or chalk, more preferably calcium carbonate, in particular carbonate of precipitated calcium coated with fatty acids.
- the hydrophobic coating of calcium carbonate may represent from 0.1% to 3.5% by weight, based on the total weight of calcium carbonate.
- the fatty acids coating the calcium carbonate comprise or consist of more than 50% by weight of stearic acid relative to the total weight of fatty acids.
- HAKUENKA® CCR-S10 marketed by OMYA
- CALOFORT® SV14 marketed by Specialty Minerals.
- the zeolites are chosen from synthetic zeolites of type A,
- the filler (C) is precipitated calcium carbonate coated with fatty acids and/or a synthetic zeolite of type A having a pore diameter of 3 ⁇ .
- the filler content (C) ranges from 1% to 25% by weight relative to the total weight of the composition (B), preferably from 2% to 20% by weight, more preferably from 4% to 15% by weight. weight, even more preferably from 6% to 11% by weight.
- the thermally conductive filler allows heat to be diffused thanks to its thermal conductivity value.
- the thermally conductive filler has a thermal conductivity greater than or equal to 3 W/mK, preferably greater than or equal to 5 W/mK, more preferably greater than or equal to 10 W/mK.
- the thermal conductivity of the conductive filler can be determined by any method known to those skilled in the art.
- the thermal conductivity is determined according to the ASTM D5740 standard.
- the thermally conductive load is electrically insulating.
- electrically insulating is meant in particular an electrical conductivity less than or equal to 0.1 S/m at 23°C, preferably less than or equal to 0.01 S/m at 23°C.
- the thermally conductive filler makes it possible to confer good thermal conductivity to the two-component thermally conductive composition according to the invention.
- composition (A) and/or composition (B) is advantageously between 0.5 and 3 W/mK, preferably between 1.0 and 2.0 W/mK, more preferably equal at approximately 1.5 W/mK.
- compositions (A) and (B) are preferably determined following the ASTM D5470 method.
- the moisture content of the thermally conductive filler is advantageously less than 0.05% by weight relative to the total weight of the thermally conductive filler, preferably less than 0.03% by weight.
- Moisture content can be determined according to the Karl Fisher method by determining the equivalence point electrometrically, for example by following the protocol described in Example 1 below.
- the at least one thermally conductive filler can be chosen from aluminosilicates, alumina, aluminum hydroxide, aluminum nitride, boron nitride, zinc oxide, magnesium oxide and their mixtures, advantageously from aluminosilicates, alumina, aluminum hydroxide, boron nitride, zinc oxide, magnesium oxide and mixtures thereof, preferably from aluminosilicates, alumina, hydroxide aluminum and their mixtures, more preferably among aluminosilicates and their mixtures.
- the thermally conductive filler is preferably of natural origin (i.e. it is not synthetic).
- the thermally conductive filler advantageously does not have a three-dimensional crystalline structure having pores of at least 3 ⁇ in diameter.
- composition (A) and/or composition (B) comprises at least two thermally conductive fillers.
- the total content of thermally conductive filler(s) in composition (A) ranges from 50% to 90% by weight relative to the total weight of composition (A), preferably from 60% to 87% by weight. weight, more preferably from 65% to 85% by weight, even more preferably from 70% to 80% by weight.
- the total content of thermally conductive filler(s) in composition (B) ranges from 50% to 90% by weight relative to the total weight of composition (B), preferably from 60% to 87% by weight. weight, more preferably from 65% to 85% by weight, even more preferably from 70% to 80% by weight.
- each of the compositions (A) and (B) comprises at least one thermally conductive filler.
- each of the compositions (A) and (B) comprises at least two thermally conductive fillers.
- the thermal conductivity of each of the compositions (A) and (B) is between 0.5 and 3 W/mK, preferably between 1.0 and 2.0 W/mK, more preferably equal to approximately 1.5 W/mK.
- the total content of thermally conductive filler(s) in each of the compositions (A) and (B) ranges from 50% to 90% by weight relative to the total weight of each of the compositions (A) and (B). , preferably from 60% to 87% by weight, more preferably from 65% to 85% by weight, even more preferably from 70% to 80% by weight.
- the composition (A) and/or the composition (B), preferably each of the compositions (A) and (B), comprises at least two thermally conductive fillers, the thermally conductive fillers in said composition having a different particle size.
- the difference in particle size d50 between two of the thermally conductive fillers is between 3 pm and 25 pm, preferably between 5 pm and 20 pm, more preferably between 10 pm and 14 pm.
- the particle size d50 is well known to those skilled in the art as the maximum size of 50% of the smallest particles by volume, and can be measured with a particle size analyzer, in particular by laser diffraction on a MALVERN type device (for example according to the standard NF ISO 13320).
- composition (A) and/or the composition (B) may also comprise at least one adhesion promoter.
- the adhesion promoter is chosen from amino-, mercapto- and epoxy-alkoxysilanes, preferably from aminoalkoxysilanes, more preferably from aminotrialkoxysilanes, even more preferably from aminotrimethoxysilanes, for example 3-aminopropyltrimethoxysilane.
- epoxy-alkoxysilane As an example of an epoxy-alkoxysilane, mention may be made of (3-glycidyloxypropyl)trimethoxysilane (also called GLYMO).
- the aminotrimethoxysilanes are formed by the group consisting of 4-amino-3,3-dimethylbutyltrimethoxysilane (for example SILQUEST A-LINK 600 marketed by MOMENTIVE), (3-aminopropyl)trimethoxysilane (for example DYNASYLAN® AMMO marketed by EVONIK) and N-(2-aminoethyl)-3-aminopropyltrimethoxysilane (for example DYNASYLAN® DAMO or DAMO-T marketed by EVONIK).
- the aminotrimethoxysilanes are (3-aminopropyl)trimethoxysilane.
- the content of adhesion promoter can range from 0.1% to 3% by weight relative to the total weight of the composition (A), preferably from 0.2% to 2% by weight, more preferably from 0.5 % to 1.5% by weight.
- the content of adhesion promoter can range from 0.1% to 3% by weight relative to the total weight of the composition (B), preferably from 0.2% to 2% by weight, more preferably from 0.5 % to 1.5% by weight.
- the content of adhesion promoter in each of the compositions (A) and (B) ranges from 0.1% to 3% by weight relative to the weight. total of each of the compositions (A) and (B), preferably from 0.2% to 2% by weight, more preferably from 0.5% to 1.5% by weight.
- composition (A) and/or composition (B) comprises at least one adhesion promoter.
- the adhesion promoter is in composition (A) only.
- Composition (B) may further comprise a crosslinking catalyst.
- the crosslinking catalyst can be any catalyst known to those skilled in the art for the condensation of silanol. Examples of such catalysts include:
- titanium acetyl acetonate for example TYZOR® AA75 marketed by Dorf Ketal
- - aluminum such as aluminum chelate (for example K-KAT® 5218 marketed by KING INDUSTRIES),
- DBU 1,8-diazabicyclo[5.4.0]undec-7-ene
- DBN 1,5-diazabicyclo[4.3.0]non-5-ene
- DBDEE diethyl-2 ether ,2'-morpholine
- DABCO 1,4-diazabicylo[2.2.2]octane
- - tin-based catalysts such as compounds derived from dioctyltin or dibutyltin; in particular dioctyltin oxide, dioctyltindiacetate, dioctyltindilaurate, dioctyltindicarboxylate, dibutyltindiacetylacetonate (DBTDAA), dibutyltindiacetate (DBTDL), dibutyltindiacetate, dibutyltin oxide or the product resulting from the reaction of bis(acetyloxy)dioctylstannane with tetraethyl orthosilicate, preferably the product resulting from the reaction of bis(acetyloxy)dioctylstannane with tetraethyl orthosilicate.
- NEOSTANN® S-1 (marketed by KANEKA)
- TIB KAT® 425 or TIB KAT® 423 marketed by TI
- the crosslinking catalyst is a tin-based catalyst, for example resulting from the reaction of bis(acetyloxy)dioctylstannane with tetraethyl orthosilicate.
- the crosslinking catalyst is a tin-based catalyst chosen from compounds derived from dioctyltin and dibutyltin, more preferably the tin-based catalyst comes from the reaction of bis(acetyloxy)dioctylstannane with tetraethyl orthosilicate (CAS No.: 93925-43-0).
- the content of crosslinking catalyst can range from 0.01% to 1.5% by weight relative to the total weight of the composition (B), preferably from 0.02% to 1.0% by weight, more preferably from 0.1% to 0.5% by weight.
- composition (B) comprises a crosslinking catalyst.
- composition (A) and/or the composition (B) may also comprise a flame retardant.
- the flame retardant is chosen from triarylphosphates, trialkylphosphates and mixtures thereof, more preferably from tricresylphosphate, cresyldiphenylphosphate, tributylphosphate, trioctylphosphate, tris(2-ethylhexyl)phosphate, tris(chloroethyl)phosphate, tris(dichloropropyl)phosphate, tris(dibromopropyl)phosphate and their mixtures, even more preferably, cresyldiphenylphosphate.
- the flame retardant content can range from 1% to 20% by weight relative to the total weight of the composition (B), preferably from 5% to 18% by weight, more preferably from 8% to 15% by weight.
- the flame retardant content can range from 1% to 20% by weight relative to the total weight of composition (A), preferably from 5% to 18% by weight, more preferably from 8% to 15% by weight.
- the content of flame retardant in each of the compositions (A) and (B) can range from 1% to 20% by weight relative to the total weight of each of the compositions (A) and (B), preferably from 5% to 18% by weight, more preferably from 8% to 15% by weight.
- composition (A) and/or composition (B) comprises a flame retardant.
- the flame retardant is in composition (B) only.
- the two-component thermally conductive composition according to the invention may also comprise at least one additive.
- the additive may be in composition (A) and/or (B).
- the additive is chosen from plasticizers, solvents, UV stabilizers and mixtures thereof.
- the two-component thermally conductive composition according to the invention comprises a mixture of additives chosen from plasticizers, solvents and UV stabilizers (or antioxidants).
- Water is not considered a solvent within the meaning of the invention.
- the total content of additives can range from 0.1% to 10% by weight relative to the total weight of the thermally conductive two-component composition, preferably from 1% to 5% by weight, more preferably from 2% to 3% by weight.
- the two-component thermally conductive composition according to the invention comprises an additive chosen from plasticizers.
- an additive chosen from plasticizers is meant a plasticizer which may be plasticizer (b) in composition (B), and/or a plasticizer which may be plasticizer (b) in composition (A) when composition ( A) does not comprise a rheology agent (r2), or a second plasticizer other than the plasticizer (b) in the composition (A) when the composition (A) comprises a rheology agent (r2).
- the additive chosen from plasticizers is introduced into composition (B).
- the additive chosen from the plasticizers can be any plasticizer usually used in the field of adhesive compositions.
- this plasticizer is chosen from:
- DINP diisononyl phthalate
- PEVALENTM marketed by PERSTORP
- this plasticizer is diisononyl hexahydrophthalate (CAS No.: 166412-78-8).
- the content of additive chosen from plasticizers ranges from 1% to 15% by weight relative to the total weight of the composition (B), preferably from 2% to 10% by weight, more preferably from 3% to 7% by weight.
- the two-component thermally conductive composition according to the invention may comprise from 0% to 5% by weight of a solvent relative to the total weight of said composition, preferably a volatile solvent at room temperature (temperature of the order of 23°C).
- the volatile solvent can, for example, be chosen from alcohols that are volatile at room temperature, such as ethanol or isopropanol.
- the two-component thermally conductive composition comprises from 0% to 1% by weight of a solvent relative to the total weight of said composition, more preferably from 0% to 0.5% by weight.
- the two-component thermally conductive composition according to the invention comprises up to 1% by weight of one or more UV stabilizers (or antioxidants) relative to the total weight of said composition, preferably up to 0.5% by weight.
- UV stabilizers are typically introduced to protect the composition from degradation resulting from a reaction with oxygen which is likely to be formed by the action of heat or light.
- antioxidants may include antioxidants that can scavenge free radicals.
- the UV stabilizer(s) are chosen from benzotriazoles, benzophenones, so-called hindered amines such as bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidyl)sebacate, bis(2,2,6,6-tetramethyl-4-piperidyl)sebacate, bis(1,2,2,6,6-pentamethyl-4-piperidyl)sebacate (CAS No.: 41556-26-7), methyl 1,2,2,6,6-pentametiyl-4-piperidyl sebacate (CAS No.: 82919-37-7), 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate octadecyl, 4,4'-bis(a,a-dimethylbenzyl)diphenylamine, and mixtures thereof.
- hindered amines such as bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidy
- the UV stabilizer(s) are chosen from so-called hindered amines such as bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidyl)sebacate, bis(2,2 ,6,6-tetramethyl-4-piperidyl)sebacate, octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, 4,4'-bis(a,a-dimethylbenzyl) diphenylamine, and mixtures thereof.
- the UV stabilizers are a mixture of bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidyl)sebacate, bis(2,2,6,6-tetramethyl-4- piperidyl)sebacate, octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate and 4,4'-bis(a,a-dimethylbenzyl)diphenylamine.
- the two-component thermally conductive composition according to the invention does not comprise a humidity absorber, in particular chosen from vinyltrimethoxysilane, vinyltriethoxysilane, alkoxyarylsilanes and p-toluenesulfonyl isocyanate.
- a humidity absorber in particular chosen from vinyltrimethoxysilane, vinyltriethoxysilane, alkoxyarylsilanes and p-toluenesulfonyl isocyanate.
- the volume ratio of composition (A) relative to composition (B) is between 0.25 and 4, preferably between 0.5 and 2, more preferably between 0.8 and 1.2, for example example equal to 1.0.
- composition (B) does not include water.
- does not include water we mean a composition in which the presence of water is solely due to the presence of moisture in the ingredients of the composition (no added water).
- composition (B) has a moisture content of less than 1% by weight relative to the total weight of composition (B), preferably less than 0.8% by weight, more preferably less than 0.5% by weight. weight, even more preferably less than or equal to 0.2% by weight.
- the moisture content of composition (B) can be determined by summing the moisture contents provided by each of the ingredients constituting it.
- the filler (C) has a significant moisture content, that is to say at least 0.05% by weight relative to the total weight of the filler (C).
- the moisture content of the composition (B) preferably corresponds to the moisture content provided by the filler (C).
- the two-component thermally conductive composition according to the invention comprises:
- composition (A) from 3% to 40% by weight of silylated polymer in composition (A), relative to the total weight of composition (A),
- composition (A) and/or in composition (B) preferably from 0.2% to 15% by weight of rheology agent (r1) and/or (r2) in composition (A) and/or in composition (B), preferably in composition (A), preferably (r2), relative to the total weight of said composition (A) or (B),
- compositions (A) and (B) - from 50% to 90% by weight of thermally conductive filler(s) in each of the compositions (A) and (B), relative to the total weight of each of the compositions (A) and (B), - from 0.1% to 3% by weight of adhesion promoter in composition (A) and/or in composition (B), preferably in composition (A), relative to the total weight of said composition ( A) or (B),
- composition (B) from 0.01% to 1.5% by weight of crosslinking catalyst in composition (B), relative to the total weight of composition (B),
- composition (A) from 0.1% to 10% by weight of one or more additives chosen from plasticizers, solvents, UV stabilizers and their mixtures, relative to the total weight of the thermally conductive two-component composition, the volume ratio of the composition (A) relative to composition (B) being between 0.25 and 4.
- the two-component thermally conductive composition according to the invention consists essentially of the ingredients mentioned above.
- essentially constituted it is meant that the two-component thermally conductive composition according to the invention comprises less than 5% by weight of ingredients other than the aforementioned ingredients, relative to the total weight of said composition, preferably less than 2% by weight. , even more preferably less than 1% by weight.
- the two-component thermally conductive composition according to the invention comprises:
- composition (A) from 3% to 40% by weight of silylated polymer in composition (A), relative to the total weight of composition (A),
- compositions (A) and (B) - from 50% to 90% by weight of thermally conductive filler(s) in each of the compositions (A) and (B), relative to the total weight of each of the compositions (A) and (B), - from 0.1% to 3% by weight of adhesion promoter in composition (A) and/or in composition (B), preferably in composition (A), relative to the total weight of said composition ( A) or (B),
- composition (B) from 0.01% to 1.5% by weight of crosslinking catalyst in composition (B), relative to the total weight of composition (B),
- composition (A) from 0.1% to 10% by weight of one or more additives chosen from plasticizers, solvents, UV stabilizers and their mixtures, relative to the total weight of the thermally conductive two-component composition, the volume ratio of the composition (A) relative to composition (B) being between 0.25 and 4.
- the two-component thermally conductive composition according to the invention consists essentially of the ingredients mentioned above.
- the two-component thermally conductive composition according to the invention comprises:
- composition (A) from 17% to 22% by weight of silylated polymer in composition (A), relative to the total weight of composition (A), the silylated polymer preferably being a polymer of formula (III'),
- rheology agent (r2) in the composition (A), relative to the total weight of the composition (A), the rheology agent (r2) comprising: o from 5 to 30% by weight of a bis-urea (a) obtained by reaction of an n-alkylamine (a1) comprising from 1 to 22 carbon atoms with a diisocyanate (a2) of formula (V) in which R 6 is the divalent radical derived from 4,2'-MDI or 4,4'-MDI, relative to the total weight of said rheology agent (r2), and o from 70 to 90% by weight of a plasticizer (b) chosen from diisodecyl phthalate, di(2-propylheptyl) phthalate and their mixtures, relative to the total weight of said rheology agent (r2),
- filler (C) from 6% to 11% by weight of filler (C) providing between 0.015% and 0.1% by weight of humidity in the composition (B), the percentages by weight being relative to the total weight of the composition (B ), the filler (C) being chosen from carbonate fillers, zeolites and their mixtures, in particular the filler (C) is precipitated calcium carbonate coated with fatty acids and/or a synthetic zeolite of the type having a pore diameter of 3 ⁇ ,
- thermally conductive filler(s) chosen from aluminosilicates and their mixtures in each of the compositions (A) and (B), relative to the total weight of each of the compositions ( A) and (B),
- adhesion promoter chosen from aminotrimethoxysilanes in composition (A), relative to the total weight of composition (A),
- composition (B) from 0.1% to 0.5% by weight of crosslinking catalyst in composition (B), relative to the total weight of composition (B), the crosslinking catalyst being a tin-based catalyst,
- flame retardant in composition (B), relative to the total weight of composition (B), the flame retardant being chosen from tricresylphosphate, cresyldiphenylphosphate, tributylphosphate, trioctylphosphate , tris(2-ethylhexyl)phosphate, tris(chloroethyl)phosphate, tris(dichloropropyl)phosphate, tris(dibromopropyl)phosphate and mixtures thereof, and
- composition (A ) from 2% to 3% by weight of one or more additives chosen from plasticizers, solvents, UV stabilizers and their mixtures, relative to the total weight of the thermally conductive two-component composition, the volume ratio of the composition (A ) relative to composition (B) being between 0.8 and 1.2.
- the two-component thermally conductive composition according to the invention consists essentially of the ingredients mentioned above.
- the two-component thermally conductive composition according to the invention has very good reactivity, that is to say that the crosslinking of the silylated polymer after mixing compositions (A) and (B) occurs quickly.
- This reactivity can be determined by measuring the open time of the two-component thermally conductive composition according to the invention.
- open time is meant the duration between the start of the mixing of compositions (A) and (B) and the start of the crosslinking of the thermally conductive two-component composition, duration during which the user can apply said thermally conductive two-component composition on the substrate(s) he wishes to assemble.
- the open time of the two-component thermally conductive composition according to the invention is less than 30 minutes, more preferably less than or equal to 15 minutes.
- the open time is preferably determined as described in Example 1 below.
- the viscosity at 21°C of the thermally conductive two-component composition according to the invention is less than or equal to 300,000 cP, preferably between 100,000 cP and 280,000 cP.
- the viscosity at 21°C of the thermally conductive two-component composition according to the invention is determined immediately after obtaining it at 20 rpm (revolutions per minute) and using a Brookfield RVT viscometer and a size 7 needle. .
- the creep of the two-component thermally conductive composition according to the invention is advantageously less than 1 inch at 23°C. Fuage can be determined according to ASTM D2202. of the thermally conductive according to the invention
- compositions (A) and (B) of the two-component thermally conductive composition according to the invention is prepared separately, by simple mixing of its ingredients, preferably under vacuum.
- under vacuum is meant a pressure lower than atmospheric pressure, advantageously between 10 kPa and 90 kPa, preferably between 50 kPa and 85 kPa, more preferably between 60 kPa and 80 kPa.
- the two-component thermally conductive composition according to the invention is prepared without adding free water, that is to say other than that inherently included in the ingredients of the composition.
- composition (A) is prepared according to the following process:
- the silylated polymer is mixed, in a suitable container, with the possible adhesion promoter and/or flame retardant and with any additives such as plasticizer, solvent and UV stabilizer (or antioxidant), preferably at a temperature between 18°C and 28°C and under vacuum, then - 2) the possible thermally conductive filler(s) are dispersed in the previous mixture at the same pressure, until a homogeneous mixture is obtained, then
- composition (B) is prepared according to the following process:
- the possible crosslinking catalyst is added at the same pressure and the medium is homogenized.
- the temperature during the preparation of composition (B) is less than or equal to 50°C, more preferably less than or equal to 45°C, even more preferably less than or equal to 40°C.
- compositions (A) and (B) and of the thermally conductive two-component composition according to the invention is described in Example 3.
- Compositions (A) and (B) can be packaged for example in a two-cartridge.
- the distribution of the two-component thermally conductive composition is then advantageously done using a two-cartridge gun.
- a homogeneous mixture of the two components is obtained by attaching, for example, a static mixer to the two-cartridge.
- the present invention also relates to the use of the two-component thermally conductive composition according to the invention as an adhesive and/or putty, preferably as an adhesive.
- the present invention also aims at the use of the two-component thermally conductive composition according to the invention as an adhesive in the field of building construction, in the field of manufacturing means of transport, preferably in the automobile, railway and aerospace industries, and in the field of shipbuilding, more particularly for assemblies intended for the manufacture of batteries, in particular rechargeable batteries for electric cars or hybrid cars.
- the present invention also relates to the use of the thermally conductive two-component composition according to the invention to improve the lifespan of a battery, preferably a rechargeable battery.
- the invention relates to the use of a filler (C) having a moisture content of between 0.05% and 5% by weight, relative to the total weight of the filler (C), for crosslinking without addition of free water to a two-component composition, the two-component composition comprising a composition (A) comprising a silylated polymer, and a composition (B) comprising said filler (C).
- free water water added to the two-component composition other than that inherently included in the ingredients of said composition.
- the filler (C), the composition (A), the composition (B) and the silylated polymer are advantageously as defined above, including the embodiments.
- the filler (C) has a moisture content preferably between 0.1% and 3% by weight, more preferably between 0.10% and 2%, relative to the total weight of the filler (C).
- the two-component composition is a thermally conductive two-component composition as described above.
- the charge (C) is used for the rapid crosslinking of a two-component composition, that is to say that the use of the charge (C) makes it possible to obtain an open time for said two-component composition of less than 30 minutes, preferably less than or equal to 15 minutes.
- the open time is as defined above.
- the present invention also relates to an article, in particular a battery, comprising the thermally conductive two-component composition according to the invention.
- the article according to the invention is a battery, in particular a rechargeable battery, more preferably for an electric or hybrid car.
- the present invention relates to a method of assembling two substrates by bonding, comprising:
- the substrates concerned are very varied and are, for example, inorganic substrates such as concrete, metals or alloys (such as aluminum alloys, steel, non-ferrous metals and galvanized metals); or organic substrates such as wood, plastics such as PVC, polycarbonate, PMMA, polyethylene, polypropylene, polyesters, epoxy resins; or metal substrates and paint-coated composites (as in the automotive sector for example).
- the substrates are metals and/or plastics.
- DYNASYLAN® AMMO marketed by EVONIK: (3-aminopropyl)trimethoxysilane (CAS No.: 13822-56-5), adhesion promoter;
- CALOFORT® SV14 marketed by Specialty Minerals: precipitated calcium carbonate coated with fatty acids, having an average particle size of 70 nm and a moisture content of 0.2% by weight relative to the total weight of CALOFORT, filler ( VS) ;
- RIASORB UV-123 marketed by RIANLON: bis (1 -octyloxy-2, 2,6,6- tetramethyl-4-piperidyl) sebacate (CAS No.: 129757-67-1), hindered amine light stabilizer ( HALS);
- - TINUVIN 770 DF bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate (CAS No.: 52829-07-9), stabilized in hindered amine light (HALS);
- - NEOSTANN S-1 marketed by KANEKA: product resulting from the reaction of bis(acetyloxy)dioctylstannane with tetraethyl orthosilicate (CAS No.: 93925-43-0), crosslinking catalyst;
- DIDP diisodecyl phthalate
- plasticizer b
- CDP cresyldiphenylphosphate
- Siliporite® SA 1720 marketed by ARKEMA: synthetic zeolite type A having a pore diameter of 3 ⁇ and a moisture content of 1% by weight relative to the total weight of the Siliporite, charge (C);
- SILATHERME® 1466-126 and SILATHERME® 1466-506 marketed by The Minerals Engineers: aluminosilicates having respectively a d50 particle size of 21 pm and 9 pm, thermally conductive fillers;
- each charge (CALOFORT® SV14 and Siliporite® SA 1720) is determined using an 870 KF Titrino plus titrator and an 803 Tl stand stirring module, according to the Karl method. Fisher as follows.
- the titrant is HYDRANALTM - Composite 5 (marketed by Honeywell), which contains 2-(2-ethoxyethoxy)ethanol and 4.5 - 5.5 mg of water per mL of titrant.
- the exact water content of the titrant is verified using a calibration solution comprising 1 mg of water per g of calibration solution (HYDRANALTM - CRM Water Standard 1.0 marketed by Honeywell), thanks to the use of the titrator’s “titer Ipol” program.
- the titrator’s “KFT Ipol” program is then used to determine the moisture content of the load (C).
- the first step of the program is an automatic conditioning step where traces of water from approximately 50 mL of dry methanol (HYDRANALTM - Methanol dry marketed by Honeywell) are neutralized. by the titrant in the tank of the stirring module. Then, a known mass (approximately 1 g) of charge (C) is introduced into the tank, then the exact mass introduced is entered in the program, and stirring is left until the medium is homogeneous (approximately 1 g). at 10 mins). Finally, the titration is carried out automatically and the moisture content of the load (C) is displayed on the titrator screen.
- the tensile strength and elongation at break were measured in accordance with standard ISO 37 (2005), at a constant speed equal to 500 mm/min.
- dumbbell-shaped specimen type 2, as illustrated in the international standard ISO 37 (2005) is used.
- the narrow part of the dumbbell used is 20 mm long, 4 mm wide and 3 to 4 mm thick.
- the composition to be tested is applied to a Teflon mold, and the composition is left to crosslink for 14 days under standard conditions (23°C and 50% relative humidity).
- the principle of measurement consists of stretching a standard test piece in a traction machine, whose movable jaw moves at a constant speed equal to 500 mm/minute, and recording:
- the tensile strength (in MPa) is the tensile stress at which rupture of the specimen occurs.
- the measurement is repeated for 5 test pieces, and the corresponding average of the results obtained is calculated.
- the open time is determined to correspond to the skin formation time.
- a bead of putty (approximately 10 cm in length and approximately 1 cm in diameter) is first placed on a cardboard support. Then, using a low density polyethylene (LDPE) pipette tip, the surface of the putty is touched every minute for up to 2 hours, to determine the exact time at which surface skin forms. This test is carried out under controlled conditions of humidity and temperature (23°C and 50% relative humidity).
- LDPE low density polyethylene
- Creep is determined at 23°C in accordance with ASTM D2202 and self-smoothing is determined at 23°C by applying a bead of the composition two-component approximately 1 cm in diameter on a horizontal surface; the composition is self-leveling if the thickness of the bead decreases to 7 mm or less after 5 minutes.
- the viscosity is determined immediately after obtaining the thermally conductive two-component composition at 20 rpm (revolutions per minute) and at 21 ° C using a Brookfield RVT viscometer and a size 7 needle.
- Thermal conductivity is measured in accordance with ASTM D5470.
- the flammability rating is determined in accordance with UL 94.
- the reaction is immediate and the reactor temperature reaches 140°C at the end of manufacturing.
- the Brookfield viscosity of the suspension measured at 23°C is 15 Pa.s.
- Example 3 Composition 1 according to the invention comprising a composition 1A and a composition 1 B
- each of the compositions 1 A and 1 B are mixed in the proportions indicated respectively in Tables 1 and 2 below, in several stages according to the process described below.
- the reactor is at room temperature (approximately 23°C) before adding ingredients, and the temperature may increase as ingredients are mixed.
- the temperature is advantageously controlled so as not to exceed 40° C. during the preparation of composition 1 B.
- step 1 The ingredients of step 1 are mixed under vacuum (between 60 kPa and 80 kPa) and at a stirring speed sufficient to homogenize.
- step 2 the ingredients from step 2 are added slowly into the reactor used for step 1, still under vacuum and at a stirring speed sufficient to homogenize.
- step 3 the ingredients from step 3 are added to the reactor, still under vacuum and at a sufficient stirring speed to homogenize.
- the moisture content provided by the filler (C) is 0.02% by weight relative to the total weight of composition 1 B.
- composition 1 according to the invention is then obtained by introducing compositions 1 A and 1 B into a two-cartridge (protected from air and humidity), then in mixing them using a dynamic mixer attached to the tip of the two-cartridge, at room temperature (23°C) in a volume ratio equal to 1.0.
- Example 4 Composition 2 according to the invention comprising a composition 2A and a composition 2B
- compositions 2A and 2B are mixed in the proportions indicated respectively in Tables 3 and 4 below, in several stages according to the process described in Example 3.
- the moisture content provided by the filler (C) (Siliporite® SA 1720) is 0.08% by weight relative to the total weight of composition 2B.
- composition 2 according to the invention is then obtained by introducing compositions 2A and 2B into a two-cartridge (protected from air and humidity), then mixing them using a fixed dynamic mixer. at the tip of the two-cartridge, at room temperature (23°C) in a volume ratio equal to 1.0.
- Example 5 Comparative compositions 3 and 4
- compositions 3A, 3B, 4A and 4B are mixed in the proportions indicated respectively in Tables 5 and 6 below (the percentages are by weight on the total weight of each respective composition), in several stages according to the process described in Example 3.
- the moisture content provided by the filler (C) is approximately 0.08% by weight relative to the total weight of each composition 3B and 4B.
- Comparative composition 3 is then obtained by introducing compositions 3A and 3B into a two-cartridge (protected from air and humidity), then mixing them using a dynamic mixer attached to the tip of the two-cartridge, at room temperature (23°C) in a volume ratio equal to 1.0.
- Comparative composition 4 is obtained in a similar manner with compositions 4A and 4B.
- Example 6 Mechanical properties of compositions 1-2 according to the invention and 3-4 comparative
- compositions 1-2 according to the invention and 3-4 comparative are summarized in Table 7 below.
- Table 7 The mechanical properties of compositions 1-2 according to the invention and 3-4 comparative (measured in accordance with Example 1) are summarized in Table 7 below.
- compositions 1 and 2 according to the invention have a very short open time (10 min at most). Thus, the compositions according to the invention crosslink quickly, while the moisture content provided by the filler (C) is very low.
- compositions 1 and 2 according to the invention allows their use in particular in assemblies intended for the manufacture of batteries.
- compositions 1 and 2 allow easy application with a manual two-cartridge, without the need for a pneumatic gun, and their low creep associated with the fact that they are not self-smoothing allows them to be applied in a non-horizontal position in limiting the risk of leaking.
- comparative composition 3 not including any rheology agent has a creep greater than 1 inch and is self-smoothing, which means that it will tend to “flow” after application, even in a horizontal position; while the comparative composition 4 comprising fumed silica as a rheology agent has a viscosity too high to be easily applied with a manual two-cartridge.
- compositions 1 and 2 according to the invention have the advantage of crosslinking quickly without adding free water, of being sufficiently thermally conductive, but also of being able to be applied easily with a manual dual cartridge while limiting the risk of leakage in a non-horizontal position.
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Abstract
Description
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Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202380044380.6A CN119301213A (zh) | 2022-06-03 | 2023-05-30 | 硅烷基聚合物的双组分导热性组合物 |
| EP23731324.2A EP4532621A1 (fr) | 2022-06-03 | 2023-05-30 | Composition bicomposante thermoconductrice de polymere silyle |
| JP2024571023A JP2025518803A (ja) | 2022-06-03 | 2023-05-30 | シリル化ポリマーの二液型熱伝導性組成物 |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FRFR2205382 | 2022-06-03 | ||
| FR2205382A FR3136238A1 (fr) | 2022-06-03 | 2022-06-03 | Composition bicomposante thermoconductrice de polymère silylé |
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| Publication Number | Publication Date |
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| WO2023233102A1 true WO2023233102A1 (fr) | 2023-12-07 |
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| PCT/FR2023/050753 Ceased WO2023233102A1 (fr) | 2022-06-03 | 2023-05-30 | Composition bicomposante thermoconductrice de polymere silyle |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP4532621A1 (fr) |
| JP (1) | JP2025518803A (fr) |
| CN (1) | CN119301213A (fr) |
| FR (1) | FR3136238A1 (fr) |
| WO (1) | WO2023233102A1 (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2025119951A1 (fr) * | 2023-12-07 | 2025-06-12 | Bostik Sa | Composition bicomposante à base de polymère silylé |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002048228A2 (fr) * | 2000-12-13 | 2002-06-20 | Sika Schweiz Ag | Compositions de polyurethanne a un composant tres resistantes aux intemperies et durcissables a l'humidite |
| EP1829928A1 (fr) | 2004-11-01 | 2007-09-05 | Kaneka Corporation | Procédé de synthèse de polyéthers et préparations contenant lesdits polyéthers |
| WO2009106699A2 (fr) | 2007-12-21 | 2009-09-03 | Bostik Sa | Adhesifs sensibles a la pression a pouvoir adhesif stable en temperature |
| EP2336208A1 (fr) | 2009-12-21 | 2011-06-22 | Bostik S.A. | Composition adhésive réticulable par chauffage |
| WO2013042638A1 (fr) * | 2011-09-21 | 2013-03-28 | 株式会社スリーボンド | Composition de résine thermoconductrice, durcissable par l'humidité |
| EP2583988A1 (fr) | 2011-10-21 | 2013-04-24 | Bostik SA | Composition adhésive de polyuréthanne pour la fabrication d'agglomérés |
| WO2017050762A1 (fr) * | 2015-09-23 | 2017-03-30 | Sika Technology Ag | Composition à deux composants |
| WO2020165288A1 (fr) * | 2019-02-13 | 2020-08-20 | Sika Technology Ag | Composition durcissable thermoconductrice |
-
2022
- 2022-06-03 FR FR2205382A patent/FR3136238A1/fr active Pending
-
2023
- 2023-05-30 JP JP2024571023A patent/JP2025518803A/ja active Pending
- 2023-05-30 CN CN202380044380.6A patent/CN119301213A/zh active Pending
- 2023-05-30 WO PCT/FR2023/050753 patent/WO2023233102A1/fr not_active Ceased
- 2023-05-30 EP EP23731324.2A patent/EP4532621A1/fr active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002048228A2 (fr) * | 2000-12-13 | 2002-06-20 | Sika Schweiz Ag | Compositions de polyurethanne a un composant tres resistantes aux intemperies et durcissables a l'humidite |
| EP1829928A1 (fr) | 2004-11-01 | 2007-09-05 | Kaneka Corporation | Procédé de synthèse de polyéthers et préparations contenant lesdits polyéthers |
| WO2009106699A2 (fr) | 2007-12-21 | 2009-09-03 | Bostik Sa | Adhesifs sensibles a la pression a pouvoir adhesif stable en temperature |
| EP2336208A1 (fr) | 2009-12-21 | 2011-06-22 | Bostik S.A. | Composition adhésive réticulable par chauffage |
| WO2013042638A1 (fr) * | 2011-09-21 | 2013-03-28 | 株式会社スリーボンド | Composition de résine thermoconductrice, durcissable par l'humidité |
| EP2583988A1 (fr) | 2011-10-21 | 2013-04-24 | Bostik SA | Composition adhésive de polyuréthanne pour la fabrication d'agglomérés |
| WO2017050762A1 (fr) * | 2015-09-23 | 2017-03-30 | Sika Technology Ag | Composition à deux composants |
| WO2020165288A1 (fr) * | 2019-02-13 | 2020-08-20 | Sika Technology Ag | Composition durcissable thermoconductrice |
Non-Patent Citations (2)
| Title |
|---|
| CAS , no. 129757-67-1 |
| CAS, no. 93925-43-0 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2025119951A1 (fr) * | 2023-12-07 | 2025-06-12 | Bostik Sa | Composition bicomposante à base de polymère silylé |
| FR3156447A1 (fr) * | 2023-12-07 | 2025-06-13 | Bostik Sa | Composition bicomposante à base de polymère silylé |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4532621A1 (fr) | 2025-04-09 |
| FR3136238A1 (fr) | 2023-12-08 |
| JP2025518803A (ja) | 2025-06-19 |
| CN119301213A (zh) | 2025-01-10 |
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