WO2024017946A1 - Schockbeständige haftklebmasse - Google Patents
Schockbeständige haftklebmasse Download PDFInfo
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- WO2024017946A1 WO2024017946A1 PCT/EP2023/070015 EP2023070015W WO2024017946A1 WO 2024017946 A1 WO2024017946 A1 WO 2024017946A1 EP 2023070015 W EP2023070015 W EP 2023070015W WO 2024017946 A1 WO2024017946 A1 WO 2024017946A1
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- pressure
- sensitive adhesive
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- filler
- adhesive
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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
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
- C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09J133/08—Homopolymers or copolymers of acrylic acid esters
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/04—Acids; Metal salts or ammonium salts thereof
- C08F220/06—Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/14—Methyl esters, e.g. methyl (meth)acrylate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1802—C2-(meth)acrylate, e.g. ethyl (meth)acrylate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1804—C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/26—Esters containing oxygen in addition to the carboxy oxygen
- C08F220/30—Esters containing oxygen in addition to the carboxy oxygen containing aromatic rings in the alcohol moiety
- C08F220/301—Esters containing oxygen in addition to the carboxy oxygen containing aromatic rings in the alcohol moiety and one oxygen in the alcohol moiety
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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
- C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
- C08K5/0025—Crosslinking or vulcanising agents; including accelerators
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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
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
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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
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing atoms other than carbon or hydrogen
- C08L23/0853—Ethene vinyl acetate copolymers
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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
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
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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
- C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L53/02—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes
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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
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
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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
- C09J7/00—Adhesives in the form of films or foils
- C09J7/10—Adhesives in the form of films or foils without carriers
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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
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
- C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/385—Acrylic polymers
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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
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/326—Applications of adhesives in processes or use of adhesives in the form of films or foils for bonding electronic components such as wafers, chips or semiconductors
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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
- C09J2421/00—Presence of unspecified rubber
- C09J2421/006—Presence of unspecified rubber in the substrate
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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
- C09J2423/00—Presence of polyolefin
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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
- C09J2423/00—Presence of polyolefin
- C09J2423/04—Presence of homo or copolymers of ethene
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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
- C09J2433/00—Presence of (meth)acrylic polymer
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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
- C09J2467/00—Presence of polyester
- C09J2467/006—Presence of polyester in the substrate
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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
- C09J2475/00—Presence of polyurethane
- C09J2475/006—Presence of polyurethane in the substrate
Definitions
- the present invention relates to the technical field of pressure-sensitive adhesives, as they are often used for the temporary and permanent bonding of a wide variety of substrates and components. More specifically, the invention proposes a specially filled pressure-sensitive adhesive based on poly(meth)acrylate, which, in addition to good adhesive properties, also achieves high shock resistance.
- Joining separate elements is one of the central processes in manufacturing technology.
- bonding i.e. joining using an adhesive
- shapeless adhesives which are applied from a tube, for example.
- the advantage of adhesive tapes is that they can be applied much more easily and with more precise positioning than liquid adhesives. They are therefore particularly suitable for miniaturized applications, such as those required in the electronics industry. It is becoming more and more important to realize the connections between the components very precisely and in a space-saving manner.
- the requirements for the performance of the devices are constantly increasing, so that the adhesive tapes used are constantly subject to new, or at least growing, performance requirements.
- the electronics market requires adhesive tapes with increasingly narrow geometries, especially for transportable devices such as smartphones or pads - web widths of less than 0.5 mm are now sometimes required. Nevertheless, these adhesive tapes must meet the highest performance requirements. It is therefore necessary that the bonds can withstand even the strongest shocks, such as those that occur when the device is dropped.
- EP 2 862 901 A1 describes a viscoelastic layer which comprises microparticles with a D90 particle diameter of 30 pm or less, the proportion of the microparticles being 15 - 40% by volume, based on the volume of the viscoelastic layer, and the viscoelastic Layer can function both as a pressure-sensitive adhesive layer and as a substrate in an adhesive tape.
- the viscoelastic layer contains an acrylate polymer as the base polymer.
- the microparticles are preferably inorganic hollow bodies, in particular hollow glass spheres.
- WO 2009/090119 A1 is concerned with a pressure-sensitive adhesive which contains expanded microballoons, the adhesive strength of the adhesive containing the expanded microballoons being compared to the adhesive strength of an adhesive of identical basis weight and recipe, which is achieved by destroying the cavities created by the expanded microballoons is defoamed is reduced by a maximum of 30%.
- WO 2016/156305 A1 describes a pressure-sensitive adhesive strip that can be removed essentially in the bonding plane without residue or destruction by stretching and consists of one or more layers of adhesive, all of which consist of a pressure-sensitive adhesive that is foamed with microballoons, and optionally one or several intermediate carrier layers, wherein the pressure-sensitive adhesive strip consists exclusively of the said adhesive layers and optionally intermediate carrier layers and the outer upper and an outer lower surface of the pressure-sensitive adhesive strip are formed by the said adhesive layer or layers.
- WO 2019/106194 A1 is a polyacrylate which is due to the following monomer composition: a) 30 to 75% by weight of at least one acrylic acid ester according to the formula (I)
- CH 2 CH-C(O)OR 1 (I), in which R 1 represents a linear or branched alkyl group with 1 to 10 carbon atoms; b) 20 to 65% by weight of at least one acrylic acid ester according to the formula (II)
- This polyacrylate serves as the basis of a pressure-sensitive adhesive, which in one embodiment is foamed.
- the pressure-sensitive adhesive has particularly good chemical resistance.
- EP 1 832 638 A1 describes a pressure-sensitive adhesive containing organic fillers, which is obtainable by a process in which a crosslinker is added to the polyacrylate in the melt to form a polyacrylate copolymer ("polyacrylate") based on acrylic acid esters and/or methacrylic acid esters at least one filler is or will be added, the polyacrylate provided with the crosslinker and the filler is conveyed to a coating unit, there is applied to a web-shaped layer of another material and is crosslinked after application.
- the crosslinker is a thermal crosslinker, some of the acrylic acid esters and/or methacrylic acid esters contain primary hydroxy groups, and the at least one filler is an organic filler. A high proportion of fillers should be possible, while still achieving a uniform and homogeneous layer pattern when coating onto a substrate.
- pressure-sensitive adhesives that have a property profile similar to that of foamed pressure-sensitive adhesives, but are nevertheless not foamed.
- the pressure-sensitive adhesive should have good adhesive properties in a wide temperature range and in particular under humid-heat conditions.
- a further additional object of the invention was to design the pressure-sensitive adhesive in such a way that it can be produced cost-effectively overall and efficiently in terms of the use of materials and energy.
- the solution to the problem is based on the idea of equipping a poly(meth)acrylate-based pressure-sensitive adhesive with specially selected fillers.
- a first and general subject of the invention is a pressure-sensitive adhesive which contains at least one poly(meth)acrylate and at least one filler, containing a total of at least 70% by weight, based on the total weight of the filler, of one or more polyolefins and/or one or more olefin copolymers; contains and is characterized in that the pressure-sensitive adhesive contains one or more of these fillers to a total of 1-13% by weight, based on the total weight of the pressure-sensitive adhesive.
- a pressure-sensitive adhesive is an adhesive that has pressure-sensitive adhesive properties, ie can form a permanent bond to a substrate even under relatively weak pressure.
- Corresponding pressure-sensitive adhesive tapes are often essentially free of residue from the adhesive base after use removable again.
- the connection between a pressure-sensitive adhesive and the substrate can also be so strong that a permanent bond is created that cannot be easily removed again.
- pressure sensitive adhesives are usually permanently self-adhesive even at room temperature, which means that they have a certain viscosity and tackiness, so that they wet the surface of a substrate even with low pressure.
- the adhesiveness of a pressure-sensitive adhesive tape results from the fact that a pressure-sensitive adhesive is used as the adhesive.
- a pressure-sensitive adhesive can be viewed as an extremely high-viscosity liquid with an elastic component, which therefore has characteristic viscoelastic properties that lead to the permanent inherent tack and pressure-sensitive adhesive ability described above.
- mechanical deformation of PSA leads to both viscous flow processes and the build-up of elastic restoring forces.
- the proportionate viscous flow serves to achieve adhesion, while the proportionate elastic restoring forces are necessary in particular to achieve cohesion.
- an adhesive is preferably understood to be pressure-sensitive and therefore a pressure-sensitive adhesive if at a temperature of 23 ° C in the deformation frequency range of 10 ° to 10 1 rad / sec G 'and G "are each at least partially in the range of 10 3 to 10 7 Pa.
- pressure-sensitive adhesives according to the invention have properties which make them appear particularly suitable for use in the production of electronic products.
- Adhesive tapes equipped with the pressure-sensitive adhesives showed good adhesive properties in conjunction with shock resistance that corresponded to or even exceeded those of foamed adhesive tapes commonly used in the electronics industry.
- pressure sensitive adhesives according to the invention have proven to be extremely advantageous after storage at elevated temperatures or under moist heat conditions.
- poly(meth)acrylates includes both polyacrylates and polymethacrylates as well as copolymers of acrylates and methacrylates in accordance with those skilled in the art. Poly(meth)acrylates can contain small amounts of monomer units that are not derived from (meth)acrylates.
- a “poly(meth)acrylate” is understood to mean a (co)polymer whose monomer base consists of monomers in a mass proportion of 70% or more, preferably 90% or more, particularly preferably 98% or more which are selected from the group consisting of acrylic acid, methacrylic acid, acrylic acid esters and methacrylic acid esters, the proportions being based on the mass of the monomer base.
- the mass fraction of acrylic acid ester and/or methacrylic acid ester is preferably 50% or more, particularly preferably 70% or more.
- Poly(meth)acrylates are generally accessible through radical polymerization of acrylic and/or methacrylic-based monomers and, if appropriate, other copolymerizable monomers.
- the monomer base of the poly(meth)acrylate of the PSA according to the invention is basically arbitrary.
- the monomer composition on which the at least one poly(meth)acrylate is based preferably comprises at least two, more preferably exactly two, acrylic acid esters according to the formula (I)
- R 1 represents a linear or branched alkyl group with 1 to 10 carbon atoms.
- R 1 in the formula (I) particularly preferably represents an n-butyl group;
- the monomer composition therefore particularly preferably comprises n-butyl acrylate.
- the monomer composition comprises at least 40% by weight of n-butyl acrylate. As has been shown, this can be used to produce particularly high-performance pressure-sensitive adhesives with a wide range of properties.
- the monomer composition comprises n-butyl acrylate at 42 to 92% by weight, for example at 45 to 90% by weight.
- the monomer composition on which the at least one poly(meth)acrylate is based comprises at least one phenoxyalkyl (meth)acrylate. It has been found that such a component gives the polymer and thus the pressure sensitive adhesive improved chemical resistance and also improved moisture-heat resistance.
- the at least one poly(meth)acrylate is preferably due to the following monomer composition: a) 50 to 80% by weight of at least one acrylic acid ester according to the formula (I)
- CH 2 CH-C(O)OR 1 (I), in which R 1 represents a linear or branched alkyl group with 1 to 10 carbon atoms; b) 15 to 45% by weight of at least one acrylic acid ester according to the formula (II)
- CH 2 CH-C(O)OR 3 (III), in which R 3 represents an H atom or a hydroxyalkyl radical with 1 to 4 carbon atoms.
- the percentage by weight is based on the total weight of the monomer composition.
- R 1 in the formula (I) preferably represents a radical selected from the group consisting of methyl, n-butyl and 2-ethylhexyl radicals, particularly preferably a methyl or n-butyl radical.
- R 2 in the formula (II) preferably represents a phenoxyethyl radical, in particular a 2-phenoxyethyl radical.
- Phenoxyethyl acrylate is preferably contained in the monomer composition of the poly(meth)acrylate at 22 to 38% by weight.
- R 3 in the formula (III) preferably represents a hydrogen atom.
- the monomer composition of the poly(meth)acrylate preferably contains 0.8 to 6% by weight of acrylic acid.
- the at least one poly(meth)acrylate of the PSA according to the invention is due to the following monomer composition: n-butyl acrylate at 35 to 55% by weight, methyl acrylate at 5 to 35% by weight, phenoxyethyl acrylate at 20 to 45 % by weight and acrylic acid at 1 to 5% by weight, each based on the total weight of the
- the poly(meth)acrylate is particularly preferably due to the following monomer composition: n-butyl acrylate at 40 to 55% by weight, methyl acrylate at 15 to 25% by weight, phenoxyethyl acrylate at 25 to 35% by weight and Acrylic acid at 1.5 to 4.5% by weight, based in each case on the total weight of the monomer composition.
- the at least one poly(meth)acrylate of the PSA according to the invention is preferably crosslinked.
- the at least one poly(meth)acrylate is thermally crosslinked.
- Thermal crosslinking can be carried out under significantly milder conditions than, for example, radiation-induced crosslinking, which can occasionally have a destructive effect. According to the invention, however, it is also possible to effect crosslinking of the poly(meth)acrylate exclusively or additionally by actinic radiation, whereby any necessary or promoting crosslinking substances can be added, for example UV crosslinkers.
- the at least one poly(meth)acrylate is thermally crosslinked, i.e. by means of one or more substances that enable (initiate) and/or promote a crosslinking reaction under the influence of thermal energy.
- the at least one poly(meth)acrylate of the PSA according to the invention is crosslinked by means of one or more covalently reacting crosslinkers, in particular by means of one or more epoxides, and/or by means of one or more coordinative crosslinkers, in particular by means of one or more metal chelates, very particularly preferred using one or more aluminum, titanium, zirconium and/or iron chelates.
- Combinations of different thermal crosslinkers for example a combination of one or more epoxides with one or more metal chelates, can therefore also be used.
- the at least one poly(meth)acrylate of the PSA according to the invention is crosslinked at least by means of a compound containing several epoxy groups, very particularly preferably by means of a compound containing several epoxy groups
- Compound which additionally contains tertiary amine functions such as tetraglycidyl meta-xylenediamine (N,N,N',N'-tetrakis(oxiranylmethyl)-1,3-benzenedimethanamine).
- tertiary amine functions such as tetraglycidyl meta-xylenediamine (N,N,N',N'-tetrakis(oxiranylmethyl)-1,3-benzenedimethanamine).
- These compounds are preferably used in an amount of 0.03 to 0.1 part by weight, particularly preferably 0.04 to 0.07 part by weight, based in each case on 100 parts by weight of the total amount of poly( meth)acrylate (solvent-free), used.
- the at least one poly(meth)acrylate is crosslinked at least by means of a compound containing several epoxy groups and additionally by means of at least one aluminum chelate, for example by means of aluminum (III) acetylacetonate.
- Metal chelate crosslinkers are preferably used in an amount of 0.01 to 0.2 parts by weight, particularly preferably 0.05 to 0.1 parts by weight, based in each case on 100 parts by weight of the total amount of poly(meth )acrylate (solvent-free), used.
- all radical or radical-controlled polymerizations can be used to produce the poly(meth)acrylate, as can combinations of different polymerization processes.
- free radical polymerization these include, for example: E.g. ATRP, nitroxide/TEMPO-controlled polymerization or the RAFT process.
- the pressure sensitive adhesive according to the invention can contain one or more poly(meth)acrylates. If it contains several poly(meth)acrylates, all poly(meth)acrylates are preferred poly(meth)acrylates in the sense of the above statements. Accordingly, all of the embodiments described above in some way as preferred, even if they are only described for “the at least one poly(meth)acrylate”, apply to all of these poly(meth)acrylates in the event that the PSA according to the invention contains several poly(meth)acrylates )acrylates.
- the pressure-sensitive adhesive according to the invention contains at least one filler, which totals at least 70% by weight, based on the total weight of the filler, of one or more polyolefins and/or one or more olefin copolymers contains.
- polyolefins are polymers that are produced from alkenes, usually by chain polymerization. In particular, this refers to polymers that are made up exclusively of unsubstituted alkenes.
- Olefin copolymers are understood, in accordance with those skilled in the art, to mean polymers which are produced either exclusively from various unsubstituted olefins or from at least one olefin and at least one other vinyl monomer. It goes without saying that each of the monomers involved in the construction of the copolymer must be contained in a technically sensible proportion.
- the at least one filler of the PSA according to the invention is preferably in the form of particles, also referred to as particles. In its pure state, the filler is therefore preferably processed in the form of a powder.
- the particles of the filler can in principle be present in the pressure-sensitive adhesive according to the invention both finely divided and in the form of agglomerates.
- the at least one filler has a D90 value of the volumetric particle size distribution, determined by laser diffraction as described herein, of 25 to 110 pm, more preferably of 30 to 95 pm, in particular of 35 to 90 pm.
- the particles of the at least one filler are also preferably irregularly shaped; At least the majority of them do not have a geometrically regular shape such as cubes, cuboids, cones, spheres and the like. A random occurrence of particles with a geometrically regular shape to a minor extent is considered irrelevant. Without wishing to be bound to this theory, the inventors assume that the irregular shape of the particles or their irregularly shaped surface is a key reason for the excellent shock-damping properties of the pressure-sensitive adhesive according to the invention.
- the at least one filler or the filler particles can be present as hollow or solid bodies.
- the filler or filler particles are preferably in the form of solid bodies.
- the PSA according to the invention also preferably contains no foaming components beyond the at least one filler, so it is preferably unfoamed.
- the at least one filler of the pressure-sensitive adhesive according to the invention contains one or more polyolefins and/or one or more olefin copolymers, preferably in a total amount of at least 90% by weight, more preferably in a total amount of at least 95% by weight and in particular in a total amount of at least 99% by weight. %, based on the total weight of the filler.
- the at least one filler consists of one or more polyolefins and/or one or more olefin copolymers.
- the polyolefins and/or olefin copolymers referred to here are preferably selected from the group consisting of polyethylene (PE), polypropylene (PP) and ethylene-vinyl acetate copolymers (EVA).
- PE polyethylene
- PP polypropylene
- EVA ethylene-vinyl acetate copolymers
- Polyethylene for its part, is preferably selected from low density polyethylene (LDPE) and high density polyethylene (HDPE).
- the at least one filler of the PSA according to the invention contains one or more polyolefins to a total of at least 90% by weight, more preferably to a total of at least 95% by weight and in particular to a total of at least 99% by weight, in each case based on the total weight of the filler.
- the at least one filler consists of one or more polyolefins.
- the polyolefins referred to here are preferably selected from the group consisting of polyethylene (PE) and polypropylene (PP).
- Polyethylene for its part, is preferably selected from low density polyethylene (LDPE) and high density polyethylene (HDPE).
- the at least one filler of the PSA according to the invention contains a total of at least 70% by weight, more preferably a total of at least 90% by weight and in particular a total of at least 99% by weight, in each case based on the total weight of the filler, of polyethylene .
- the at least one filler consists of polyethylene.
- the polyethylene can be a specific polyethylene or a mixture of different polyethylenes.
- the at least one filler of the PSA according to the invention contains a total of at least 70% by weight, more preferably a total of at least 90% by weight and in particular a total of at least 99% by weight, in each case based on the total weight of the filler, of low density Polyethylene (LDPE).
- the at least one filler essentially consists of low density polyethylene (LDPE), in particular it consists of low density polyethylene (LDPE).
- LDPE low density polyethylene
- the low density polyethylene can be a specific LDPE or a mixture of different low density polyethylenes.
- the PSA according to the invention contains at least one adhesive resin and/or at least one plasticizer.
- Adhesive resins also known as tackifying resins, are often added to pressure-sensitive adhesives to fine-tune the pressure-sensitive adhesive properties.
- resins are understood to mean, in particular, those oligo- and (low-)polymer compounds whose number-average molar mass M n is not more than 5,000 g/mol.
- Adhesive resins generally increase the adhesive strength, especially the “tack”, the so-called tack of a pressure sensitive adhesive.
- Adhesive resins often have softening points in the range of 80 to 150 °C.
- the pressure sensitive adhesive according to the invention can contain at least one adhesive resin selected from the group consisting of pinene and indene resins; Rosin and rosin derivatives such as rosin esters, also through e.g. B. Disproportionation or hydrogenation-stabilized rosin derivatives; polyterpene resins; terpene phenolic resins; alkylphenol resins; and aliphatic, aromatic and aliphatic-aromatic hydrocarbon resins.
- an adhesive resin selected from the group consisting of pinene and indene resins; Rosin and rosin derivatives such as rosin esters, also through e.g. B. Disproportionation or hydrogenation-stabilized rosin derivatives; polyterpene resins; terpene phenolic resins; alkylphenol resins; and aliphatic, aromatic and aliphatic-aromatic hydrocarbon resins.
- Adhesive resins are preferably contained in a maximum total of 30% by weight in the PSA according to the invention.
- One or more adhesive resins may be included.
- the behavior of a pressure-sensitive adhesive according to the invention under permanent pressure can be improved by adding adhesive resins.
- the pressure-sensitive adhesive according to the invention is particularly preferably free of adhesive resins.
- a pressure sensitive adhesive according to the invention can also contain reactive resins.
- Reactive resins are understood to mean resins that have such functional groups that they can react chemically with other components of the pressure-sensitive adhesive, in particular the polyacrylate or polyacrylates, with suitable activation.
- the pressure-sensitive adhesive according to the invention is preferably free of reactive resins.
- the pressure sensitive adhesive according to the invention can contain at least one plasticizer.
- the plasticizer is preferably selected from the group consisting of (meth)acrylate oligomers, phthalates, hydrocarbon oils, cyclohexanedicarboxylic acid esters, benzoic acid esters, water-soluble plasticizers, soft resins, phosphates and polyphosphates.
- the plasticizer is particularly preferably selected from the group consisting of phthalates, cyclohexanedicarboxylic acid esters and benzoic acid esters.
- the plasticizer is a benzoic acid ester, very particularly preferably a dibenzoic acid ester, for example diethylene glycol dibenzoate.
- Plasticizers are preferably contained in the pressure-sensitive adhesive according to the invention to a total of a maximum of 30% by weight, particularly preferably a maximum of 20% by weight, in particular a maximum of 15% by weight.
- the addition of one or more plasticizers can improve the shock resistance of a pressure sensitive adhesive according to the invention without significantly impairing the chemical resistance. This effect can be achieved to a particularly high degree by adding diethylene glycol dibenzoate.
- the pressure-sensitive adhesive according to the invention is particularly preferably free of plasticizers.
- the proportion of adhesive resins and plasticizers together in the PSA according to the invention is a maximum of 40% by weight.
- a pressure-sensitive adhesive according to the invention is preferably carried out in such a way that the poly(meth)acrylate or poly(meth)acrylates are first produced from the corresponding underlying monomer mixtures by radical polymerization and are preferably further processed as a solution. In the case of several poly(meth)acrylates, these are then thoroughly mixed. If provided, crosslinkers are added during or preferably after polymerization. If further additives are to be added, these are also added.
- a pressure-sensitive adhesive according to the invention is - in accordance with the previous paragraph - preferably coated as a solution - if necessary after setting a certain solids content - onto a carrier or a release liner.
- the coating is preferably carried out using conventional coating processes such as anilox roller application, comma knife coating, multi-roll coating or in a printing process.
- the solvent can then be removed in a drying tunnel or oven.
- crosslinking usually occurs in smaller proportions at room temperature and in larger proportions when heat is applied, especially during the removal of the solvent.
- Coordinative crosslinkers generally crosslink the polyacrylate regardless of temperature; For this reason, substances are occasionally added that initially block the crosslinker. These are then removed with the solvent so that crosslinking begins immediately at this point.
- the coating can also be carried out using a solvent-free process.
- the polyacrylate is heated and melted in an extruder. Further process steps such as mixing with additives, filtration or degassing can take place in the extruder. The melt is then applied as a layer onto a carrier or a release liner using a calender.
- Another subject of the invention is an adhesive tape which comprises a pressure-sensitive adhesive according to the invention.
- an adhesive tape according to the invention consists of only one layer of a pressure-sensitive adhesive according to the invention.
- the pressure-sensitive adhesive is preferably covered with at least one release liner.
- release liners are only seen as an aid and not as part of the adhesive tape.
- the layer thickness of an adhesive tape according to the invention is preferably a maximum of 500 pm, more preferably a maximum of 450 pm, in particular a maximum of 400 pm, very particularly preferably a maximum of 370 pm.
- An adhesive tape described above is preferably used as an adhesive in the production of assembly bonds, more preferably in the production of assembly bonds in electronic, optical or precision mechanical devices. Assembly bonds are generally used for long-term, in particular permanent, bonding of two substrates.
- an adhesive tape according to the invention can also comprise at least one carrier and optionally also further layers, for example further pressure-sensitive adhesive layers, barrier layers, further reinforcing carrier layers, etc.
- carrier materials include fabrics, scrims and plastic films, for example PET films, polyolefin films and polyurethane films.
- the adhesive tape according to the invention comprises a plastic film on which a layer of a pressure-sensitive adhesive according to the invention is arranged on the top and bottom.
- At least one PSA of the adhesive tape is preferably covered with a release liner in order to enable problem-free unwinding and to protect the PSA(s) from contamination.
- Release liners usually consist of a plastic film siliconized on one or both sides (e.g. PET or PP) or a siliconized paper carrier. They are not included in the adhesive tape, but are only temporarily connected to it as an aid.
- the adhesive tape according to the invention comprises a PET film or alternatively a polyurethane or synthetic rubber film as a carrier layer.
- the adhesive tape in a first variant of the above embodiment comprises a PET film as a carrier layer, this preferably has a thickness of 10 to 100 ⁇ m, thicker preferably from 12 to 80 pm, in particular from 15 to 60 pm.
- a layer of a pressure-sensitive adhesive according to the invention is arranged on the top and bottom, the layers particularly preferably being essentially identical.
- the thickness of the two PSA layers, independently of each other, is preferably 15 to 200 ⁇ m, in particular 30 to 150 ⁇ m.
- Adhesive tapes according to this variant are preferably used as adhesives in the production of assembly bonds, more preferably in the production of assembly bonds in electronic, optical or precision mechanical devices
- the adhesive tape according to the invention comprises a polyurethane film or a synthetic rubber film and a layer of a pressure-sensitive adhesive according to the invention on the top and bottom sides;
- the adhesive tape preferably consists of a polyurethane film or a synthetic rubber film and a layer of a pressure-sensitive adhesive according to the invention on the top and bottom.
- the thickness of the film is preferably 10 to 250 pm, more preferably 20 to 220 pm. In a special embodiment, the thickness of the film is up to 250 pm, preferably 70 to 230 pm. In a further special embodiment, the thickness of the polyurethane film is 5 to 70 pm, in particular 10 to 30 pm. Polyurethane films are particularly preferred among the films.
- the thickness of the PSA layers is preferably 10 to 120 pm, independently of each other, more preferably 15 to 110 pm, independently of each other. Particularly preferably, both PSA layers are essentially identical.
- An adhesive tape according to this variant is preferably used as an adhesive tape that can be removed by stretching, particularly preferably for producing bonds in electronic, optical or precision mechanical devices.
- a further subject of the invention is the use of a pressure-sensitive adhesive according to the invention and/or an adhesive tape according to the invention as an adhesive in the production of assembly bonds and/or bonds in electronic, optical or precision mechanical devices.
- Electronic, optical and precision mechanical devices within the meaning of the invention are in particular devices such as those in Class 9 of the International Classification of Goods and Services for the Registration of Trademarks (Nice Classification); 10th edition (NCL(10-2013)); are to be classified if they are electronic, optical or precision mechanical devices, as well as clocks and timepieces in accordance with Class 14 (NCL(10-2013)), such as scientific, nautical, surveying, photographic, film, optical, weighing, measuring, signaling, control and rescue devices - and teaching apparatus and instruments;
- image recording, processing, transmission and reproduction devices such as televisions and the like;
- Acoustic recording, processing, transmission and reproduction apparatus such as radios and the like;
- Remote communication and multifunctional devices with remote communication functions such as telephones, answering machines;
- Chemical and physical measuring devices, control devices and instruments such as battery chargers, multimeters, lamps, tachometers;
- solar cell modules such as electrochemical dye solar cells, organic solar cells, thin film cells;
- a pressure-sensitive adhesive according to the invention and/or an adhesive tape according to the invention is therefore preferably used for producing bonds in portable electronic, optical or precision mechanical devices.
- portable devices are in particular:
- Photographic cameras digital cameras, photography accessories (such as light meters, flash units, apertures, camera housings, lenses, etc.), film cameras, video cameras, small computers (mobile computers, pocket computers, calculators), laptops, notebooks, netbooks, ultrabooks, tablet computers, handhelds, electronic diaries and organizers (so-called “electronic organizers” or “personal digital assistants”, PDA, palmtops), modems;
- Computer accessories and control units for electronic devices such as mice, drawing pads, graphics tablets, microphones, speakers, game consoles, gamepads, remote controls, remote controls, touchpads ("touchpads");
- Monitors displays, screens, touch-sensitive screens (touchscreen devices), projectors;
- Small televisions pocket televisions, film players, video players, radios (including small and pocket radios), Walkmen, Disemen, music players for example CD, DVD, Bluray, cassettes, USB, MP3, headphones, cordless telephones, mobile phones, smartphones, walkie-talkies, hands-free devices, pagers ( pager, beeper); Mobile defibrillators, blood glucose meters, blood pressure monitors, pedometers, heart rate monitors;
- Mobile detectors optical magnifiers, long-distance vision devices, night vision devices, GPS devices, navigation devices, portable satellite communication interface devices;
- USB sticks external hard drives, memory cards
- Wristwatches digital watches, pocket watches, chain watches, stopwatches.
- a pressure-sensitive adhesive according to the invention and/or an adhesive tape according to the invention is used to produce bonds in smartphones (mobile phones), tablets, notebooks, cameras, video cameras, keyboards or touchpads.
- a 300 L reactor conventional for radical polymerizations was filled with a total of 100 kg of the monomers listed in Table 2 corresponding to the composition also given there, as well as 72.4 kg of gasoline/acetone (70:30). After passing through nitrogen gas for 45 minutes while stirring, the reactor was heated to 58 ° C and 50 g of Vazo® 67 were added. The jacket temperature was then heated to 75 °C and the reaction was carried out constantly at this external temperature. After a reaction time of 1 hour, 50 g of Vazo® 67 were added again. After 3 hours it was diluted with 20 kg of petrol/acetone (70:30) and after 6 hours with 10.0 kg of petrol/acetone (70:30). To reduce the residual initiators, 0.15 kg of Perkadox® 16 were added after 5.5 and 7 hours. The reaction was stopped after a reaction time of 24 hours and cooled to room temperature. The solution was adjusted to a solids content of 38% by weight.
- the polyacrylate including the crosslinker was placed in solution (see Production of Polyacrylates) and the filler was added as a powder. If necessary, solvent was added to adjust the desired solids content. If intended, the dye was slurried with some acetone and added to the polymer solution. The components were then mixed homogeneously with a stirrer. Shortly before coating, the crosslinking system (see Table 3) was added as a 5% solution in acetone and stirred in homogeneously.
- composition thus obtained was coated in solution onto a release liner (siliconized PET film) using a comma knife (see Table 3 for layer thickness).
- the solvent was removed in a drying tunnel (10 min, 105 °C).
- the pressure-sensitive adhesive was applied to the release liner in the relevant layer thickness (see “Production of pressure-sensitive adhesives”).
- the pressure-sensitive adhesives were applied to the release liner in the relevant layer thickness (see “Production of pressure-sensitive adhesives”) and then laminated to the respective carrier.
- the adhesive tapes were covered on both sides with release liners.
- Plastic test plate - plate made of PBT, reinforced with 30% glass fiber, surface roughness of 1 pm
- test plates were first wiped with ethanol (PBT test plate) or acetone (steel plate) for cleaning and conditioning and then left in the air for 5 minutes to allow the solvent to evaporate.
- the side of the tape facing away from the test substrate was then covered with 36 pm etched PET film, preventing the sample from stretching during measurement.
- the adhesive tape was then rolled back and forth twice with a 2 kg rubber roller Rolling speed of 10 m/min was applied to the test substrate. Immediately afterwards, the adhesive tape was peeled off the test substrate at an angle of 180 ° C, with the force required to do this being measured using a Zwick tensile testing machine. The measurement results are given in N/cm and are averaged from three individual measurements.
- An adhesive strength of at least 3.0 N/cm is considered a good result.
- a square, frame-shaped sample was cut out of the adhesive tape (PSA) to be examined (external dimensions 33 mm x 33 mm; web width 2.0 mm; internal dimensions (window cutout) 29 mm x 29 mm).
- This sample was glued to a polycarbonate (PC) frame (external dimensions 45 mm x 45 mm; web width 10 mm; internal dimensions (window cutout) 25 mm x 25 mm; thickness 3 mm).
- PC polycarbonate
- a 35mm x 35mm PC window was stuck on the other side of the tape.
- the PC frame, adhesive tape frame and PC window were glued in such a way that the geometric centers and diagonals were on top of each other (corner-to-corner).
- the bonding area was 248 mm 2 .
- the bond was pressed with 248 N for 5 s and stored conditioned at 23 °C / 50% relative humidity for 24 hours.
- the adhesive composite consisting of the PC frame, adhesive tape and PC window was stretched into a sample holder with the protruding edges of the PC frame in such a way that the composite was aligned horizontally and the PC window was below the frame.
- the sample holder was then inserted centrally into the intended holder of the “DuPont Impact Tester”.
- the 190 g impact head was inserted so that the circular impact geometry with a diameter of 20 mm rested centrally and flush on the window side of the PC window.
- E [J] height [m]* weight [kg]* 9.81 m/s 2 .
- the drop tower test method as an instrumented drop mechanism test is also used to measure the puncture strength.
- a square, frame-shaped sample was cut out of the adhesive tape to be examined (area 180 mm 2 , web width 2.0 mm). This sample was glued to a steel frame that had been cleaned with acetone. A steel window cleaned with acetone was glued to the other side of the adhesive tape. The steel frames, adhesive tape frames and steel windows were bonded in such a way that the geometric centers and diagonals were on top of each other (corner-to-corner). The bond was pressed with 62 N for 10 s and stored conditioned at 23 °C / 50% relative humidity for 24 hours.
- the test specimen was placed in the sample holder of the instrumented drop mechanism in such a way that the composite was horizontal with the steel window facing downwards.
- the measurement was carried out instrumentally and automatically using a load weight of 5 kg and a fall height of 20 cm.
- the kinetic energy introduced by the load weight destroyed the bond by breaking the adhesive tape between the window and the frame, with the force being recorded by a piezoelectric sensor in a ps cycle.
- the associated software displayed the graph of the force-time curve, from which the maximum force F ma x could be determined. Shortly before the impact of the rectangular impact geometry on the window, the speed of the falling weight was two Light barriers determined.
- the work done by the bond until complete detachment was determined from the force curve, the time required until detachment and the speed of the falling weight, ie the detachment work.
- Five test specimens from each sample were examined; the final result of the impact strength consists of the average of the release work or the maximum force (F ma x in N) of these five samples.
- the shear strength was determined in a test climate of 70 °C +/- 1 °C and 50% +/- 5% relative humidity.
- test samples were cut to a width of 25 +/- 0.2 mm.
- 50 x 25 mm ASTM steel plates with 2 mm thickness and a 25 mm marking line were used, which were cleaned three times with acetone before bonding and then allowed to dry for 10 min.
- the bonding area was 25 x 25 mm.
- the test strip was applied to the center of the adhesive substrate in the longitudinal direction while avoiding air pockets by brushing over it with a wiper so that the upper edge of the test sample rested exactly on the 25 mm marking line.
- the back of the test sample was masked with 36 pm etched PET film. The free protruding end was covered with paper.
- the adhesive strip was then rolled back and forth twice with a 2 kg roller.
- a strap loop (weight 5-7 g) was attached to the protruding end of the adhesive tape.
- the plate prepared in this way was attached to a counter clock using a hook using the adapter plate, and a 1 kg weight was hooked smoothly into the belt loop.
- the installation time between rolling and loading was 12 minutes. The time was measured in minutes until the bond failed; the results are averaged from three measurements.
- Strips 10 mm wide and 40 mm long were punched out of the adhesive tape to be examined. These strips were glued to a length of 30 mm on an ethanol-conditioned battery foil plate so that a 10 mm long handle protruded. An ASTM plate was glued to the second side of the glued strip so that the two panels lay flush on top of each other. The composite was rolled over 10 times with a 4 kg roller (5 times back and forth). After 4 hours and 24 hours of application, the strips at the handle were manually stripped from the adhesive joint at a) 90" angle and b) 180" angle. It was assessed how many samples could be removed without leaving any residue.
- the particle size distribution was carried out using laser diffraction with the “Bettersizer S3 Plus” device. Isopropanol was used as the dispersing medium. The sample was added directly to the dispersion unit filled with isopropanol. Before the measurement, the sample was exposed to device-internal ultrasound (35 W) for 1 min, which was no longer present during the measurement. The stirring speed was 1200 rpm. The evaluation was carried out according to Mie with the refractive index optimized by the device. The particle shape was determined using dynamic image analysis directly after laser diffraction. A 10X camera was used. Approximately 5000 particles were analyzed. The evaluation was carried out using the area equivalent diameter.
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- Chemical Kinetics & Catalysis (AREA)
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- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Adhesive Tapes (AREA)
Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020257005423A KR20250039452A (ko) | 2022-07-21 | 2023-07-19 | 내충격성 감압 접착제 화합물 |
| CN202380055265.9A CN119522258A (zh) | 2022-07-21 | 2023-07-19 | 耐冲击的压敏胶粘剂 |
| EP23748230.2A EP4558572A1 (de) | 2022-07-21 | 2023-07-19 | Schockbeständige haftklebmasse |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022118334.3 | 2022-07-21 | ||
| DE102022118334.3A DE102022118334A1 (de) | 2022-07-21 | 2022-07-21 | Schockbeständige Haftklebmasse |
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| Publication Number | Publication Date |
|---|---|
| WO2024017946A1 true WO2024017946A1 (de) | 2024-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2023/070015 Ceased WO2024017946A1 (de) | 2022-07-21 | 2023-07-19 | Schockbeständige haftklebmasse |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP4558572A1 (de) |
| KR (1) | KR20250039452A (de) |
| CN (1) | CN119522258A (de) |
| DE (1) | DE102022118334A1 (de) |
| WO (1) | WO2024017946A1 (de) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001240812A (ja) * | 2000-03-01 | 2001-09-04 | Tombow Pencil Co Ltd | 感圧転写粘着テープ |
| EP1832638A1 (de) | 2006-03-08 | 2007-09-12 | Tesa AG | Thermisch vernetzte Acrylat-Hotmelts mit organischen Füllstoffen |
| WO2009090119A1 (de) | 2008-01-14 | 2009-07-23 | Tesa Se | Geschäumte, insbesondere druckempfindliche klebemasse, verfahren zur herstellung sowie die verwendung derselben |
| EP2862901A1 (de) | 2006-03-10 | 2015-04-22 | Nitto Denko Corporation | Mikropartikelhaltige viskoelastische Schicht und druckempfindliches Klebeband bzw. Folie |
| WO2015189323A1 (de) | 2014-06-11 | 2015-12-17 | Tesa Se | Polyester-polyurethan |
| WO2016156305A1 (de) | 2015-04-02 | 2016-10-06 | Tesa Se | Wiederablösbarer haftklebestreifen |
| WO2019106194A1 (de) | 2017-12-01 | 2019-06-06 | Tesa Se | Chemikalienbeständiges polyacrylat und darauf basierende haftklebmasse |
| US20200254734A1 (en) * | 2019-02-07 | 2020-08-13 | Nitto Denko Corporation | Double-sided pressure-sensitive adhesive tape |
| WO2022060729A1 (en) * | 2020-09-15 | 2022-03-24 | Dow Global Technologies Llc | Acrylic-based adhesive composition with ethylene vinyl acetate |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH093413A (ja) * | 1995-06-20 | 1997-01-07 | Sekisui Chem Co Ltd | アクリル系粘着シート |
| JP4205356B2 (ja) * | 2002-03-28 | 2009-01-07 | トッパン・フォームズ株式会社 | 接着剤組成物、接着剤組成物の製造方法、情報担持用シート |
| DE102004044086A1 (de) * | 2004-09-09 | 2006-03-16 | Tesa Ag | Thermisch vernetzte Acrylat-Hotmelts |
-
2022
- 2022-07-21 DE DE102022118334.3A patent/DE102022118334A1/de active Pending
-
2023
- 2023-07-19 EP EP23748230.2A patent/EP4558572A1/de active Pending
- 2023-07-19 KR KR1020257005423A patent/KR20250039452A/ko active Pending
- 2023-07-19 WO PCT/EP2023/070015 patent/WO2024017946A1/de not_active Ceased
- 2023-07-19 CN CN202380055265.9A patent/CN119522258A/zh active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001240812A (ja) * | 2000-03-01 | 2001-09-04 | Tombow Pencil Co Ltd | 感圧転写粘着テープ |
| EP1832638A1 (de) | 2006-03-08 | 2007-09-12 | Tesa AG | Thermisch vernetzte Acrylat-Hotmelts mit organischen Füllstoffen |
| EP2862901A1 (de) | 2006-03-10 | 2015-04-22 | Nitto Denko Corporation | Mikropartikelhaltige viskoelastische Schicht und druckempfindliches Klebeband bzw. Folie |
| WO2009090119A1 (de) | 2008-01-14 | 2009-07-23 | Tesa Se | Geschäumte, insbesondere druckempfindliche klebemasse, verfahren zur herstellung sowie die verwendung derselben |
| WO2015189323A1 (de) | 2014-06-11 | 2015-12-17 | Tesa Se | Polyester-polyurethan |
| WO2016156305A1 (de) | 2015-04-02 | 2016-10-06 | Tesa Se | Wiederablösbarer haftklebestreifen |
| WO2019106194A1 (de) | 2017-12-01 | 2019-06-06 | Tesa Se | Chemikalienbeständiges polyacrylat und darauf basierende haftklebmasse |
| US20200254734A1 (en) * | 2019-02-07 | 2020-08-13 | Nitto Denko Corporation | Double-sided pressure-sensitive adhesive tape |
| WO2022060729A1 (en) * | 2020-09-15 | 2022-03-24 | Dow Global Technologies Llc | Acrylic-based adhesive composition with ethylene vinyl acetate |
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| Title |
|---|
| SATAS: "Handbook of Pressure Sensitive Adhesives Technology", 1999, pages: 153 - 203 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102022118334A1 (de) | 2024-02-01 |
| EP4558572A1 (de) | 2025-05-28 |
| CN119522258A (zh) | 2025-02-25 |
| KR20250039452A (ko) | 2025-03-20 |
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