EP1379579A1 - Corps moules mousses en silicone et utilisation des produits fabriques - Google Patents
Corps moules mousses en silicone et utilisation des produits fabriquesInfo
- Publication number
- EP1379579A1 EP1379579A1 EP02716810A EP02716810A EP1379579A1 EP 1379579 A1 EP1379579 A1 EP 1379579A1 EP 02716810 A EP02716810 A EP 02716810A EP 02716810 A EP02716810 A EP 02716810A EP 1379579 A1 EP1379579 A1 EP 1379579A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- silicone
- ammonium
- component
- liquid
- liquid silicone
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 229910052710 silicon Inorganic materials 0.000 title abstract description 6
- 239000010703 silicon Substances 0.000 title abstract description 6
- 239000007788 liquid Substances 0.000 claims abstract description 38
- 238000001746 injection moulding Methods 0.000 claims abstract description 19
- 239000000203 mixture Substances 0.000 claims abstract description 14
- 239000001099 ammonium carbonate Substances 0.000 claims abstract description 11
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 claims abstract description 7
- 235000012538 ammonium bicarbonate Nutrition 0.000 claims abstract description 7
- 235000012501 ammonium carbonate Nutrition 0.000 claims abstract description 4
- KXDHJXZQYSOELW-UHFFFAOYSA-N carbonic acid monoamide Natural products NC(O)=O KXDHJXZQYSOELW-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229920001296 polysiloxane Polymers 0.000 claims description 52
- 229920002379 silicone rubber Polymers 0.000 claims description 27
- 150000003868 ammonium compounds Chemical class 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 18
- 239000004945 silicone rubber Substances 0.000 claims description 18
- 238000004132 cross linking Methods 0.000 claims description 15
- 238000000465 moulding Methods 0.000 claims description 15
- 229920002545 silicone oil Polymers 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 239000006096 absorbing agent Substances 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- 230000035939 shock Effects 0.000 claims description 4
- 239000003921 oil Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 238000007669 thermal treatment Methods 0.000 claims description 3
- 206010016717 Fistula Diseases 0.000 claims description 2
- 230000001580 bacterial effect Effects 0.000 claims description 2
- 230000003890 fistula Effects 0.000 claims description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 2
- 239000012774 insulation material Substances 0.000 claims description 2
- 239000011707 mineral Substances 0.000 claims description 2
- 239000005022 packaging material Substances 0.000 claims description 2
- 238000007493 shaping process Methods 0.000 claims description 2
- 239000002904 solvent Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims 1
- 239000006185 dispersion Substances 0.000 abstract description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 5
- 238000005266 casting Methods 0.000 abstract 1
- 239000007787 solid Substances 0.000 description 7
- 229920001971 elastomer Polymers 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000011049 filling Methods 0.000 description 5
- -1 polydimethylsiloxanes Polymers 0.000 description 5
- 239000005060 rubber Substances 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 239000004604 Blowing Agent Substances 0.000 description 4
- 239000007795 chemical reaction product Substances 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229920002050 silicone resin Polymers 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 239000004944 Liquid Silicone Rubber Substances 0.000 description 2
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 2
- 229910020175 SiOH Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 238000011031 large-scale manufacturing process Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 2
- 229920001921 poly-methyl-phenyl-siloxane Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 229920002631 room-temperature vulcanizate silicone Polymers 0.000 description 2
- 229920005573 silicon-containing polymer Polymers 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 239000004971 Cross linker Chemical group 0.000 description 1
- 229920004449 Halon® Polymers 0.000 description 1
- 229910018557 Si O Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 1
- 229920004482 WACKER® Polymers 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- BVCZEBOGSOYJJT-UHFFFAOYSA-N ammonium carbamate Chemical compound [NH4+].NC([O-])=O BVCZEBOGSOYJJT-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 229920005601 base polymer Polymers 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 1
- 229960001275 dimeticone Drugs 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000003925 fat Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- CXQXSVUQTKDNFP-UHFFFAOYSA-N octamethyltrisiloxane Chemical compound C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C CXQXSVUQTKDNFP-UHFFFAOYSA-N 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 150000001451 organic peroxides Chemical class 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000006072 paste Substances 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000012508 resin bead Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical class O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
- C08J9/08—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing carbon dioxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0014—Use of organic additives
- C08J9/0028—Use of organic additives containing nitrogen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2383/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
- C08J2383/04—Polysiloxanes
Definitions
- the invention relates to a method for producing foamed molded articles made of silicone, in particular silicone rubber, and the use of the manufactured products.
- Silicones can be divided into oils, resins and rubbers according to their areas of application. Silicone oils that are processed into emulsions, anti-show agents, pastes, fats and the like are linear polydimethylsiloxanes. Silicone resins are more or less cross-linked polymethyl- or polymethylphenylsiloxanes, whose elasticity and heat resistance increase with the content of phenyl groups. Silicone resins are used, for example, to manufacture paints, to coat household appliances and laminates. Silicone rubbers are masses which can be converted into the rubber-elastic state and which, as base polymers, contain polydiorganosiloxanes which have groups accessible to crosslinking reactions.
- Silicone rubbers differ from the other types of rubber in that they are not purely organic compounds. Their structure gives the silicone rubbers their unique properties. A general distinction is made between hot-vulcanizing (HTV) silicone rubbers and cold-curing (RTV) silicone rubbers. One can differentiate between one and two component systems for the cold-curing RTV silicone rubber compounds.
- HTV hot-vulcanizing
- RTV cold-curing
- RTV-1 one-component silicone rubber
- RTV-1 the mass polymerizes slowly at room temperature under the influence of atmospheric humidity, the crosslinking taking place through condensation of SiOH groups with formation of Si-O bonds.
- the SiOH groups are formed by hydrolysis of SiX groups of an intermediate species formed from a polymer with terminal OH groups and a crosslinker.
- RTV-2 two-component rubbers
- mixtures of silicic acid esters and organotin compound, for example are used as crosslinking agents.
- HTV silicone rubbers are usually plastically deformable materials that contain highly disperse silica and organic peroxides as cross-linking catalysts and, after vulcanization at temperatures of more than 100 ° C, result in heat-resistant elastic silicone elastomers (silicone rubber).
- Another crosslinking mechanism consists in the addition of Si-H groups to Si-bonded vinyl groups, both of which are built into the polymer chains or at the end thereof.
- Radiation crosslinking is also known for HTV silicone rubbers. Since 1980, a liquid rubber technology (LSR Liquid Silicone Rubber) has been established, are vulcanized in which two liquid silicone rubber components via 'addition crosslinking in injection molding machines. ⁇
- Liquid silicones open up new applications due to their • special ' material properties. rich in elastomer processing. In this way, new types of elastomer-thermoplastic composites can expand the range of previous silicone rubbers.
- LIM liquid injection molding
- Japanese patent application Sho 44-461 (461/1969) describes moldable sponge-like silicone rubber compositions which contain a thermally degradable blowing agent, in particular azobisisobutyronitrile. By breaking down the blowing agent, however, substances are produced which are harmful to humans and are therefore problematic from the point of view of environmental pollution.
- Japanese patent application Hei 10-36544 (36,544 / 1998) describes a moldable sponge-like silicone rubber composition which comprises hollow thermoplastic silicone resin particles which are mixed into the liquid silicone composition, during which gases develop during the polymerization and in this way produce pores in the molded body ,
- the silicone rubber sponge produced in this way has only a low mechanical strength, so the uses of this sponge are limited.
- US 6,299,952 describes a moldable silicone rubber sponge composition which also comprises a gas-containing thermoplastic resin bead.
- These liquids are, for example, methylene chloride, HALON® (polytetrafluoroethylene), heptane and trichlorethylene.
- HALON® polytetrafluoroethylene
- heptane heptane
- trichlorethylene trichlorethylene
- the of the present invention underlying technical problem of providing means and methods for producing foamed articles made of silicone, in particular silicone rubber to provide, with the mold body using known methods, in particular the Liquid Injec- tion molding process, in ⁇ simple and inexpensive Way ' can be produced and have sufficient mechanical stability, and ' where the disadvantages known in the prior art are avoided during manufacture.
- the present invention solves its underlying problem by providing a method for producing a foamed molded body of silicone rubber, whereby a two-component liquid silicone composition in the injection molding apparatus is thermally heated and vulcanized in a shaping cavity of the injection molding apparatus', wherein before the thermal treatment at least one liquid silicone component is mixed with an ammonium compound.
- ammonium compounds ammonium carbonate, ammonium carbaminate and ammonium hydrogen carbonate which are preferably used according to the invention are known and toxic see crystalline chemicals that are used in food technology as a blowing agent, for example baking powder.
- the preferably used solid ammonium hydrogen carbonate passes into the gas phase at about 108 ° C., for example, without becoming liquid.
- the resulting reaction products are carbon dioxide, ammonia and water vapor, which are reaction products that are often found in the environment.
- Ammonia which occurs in higher concentrations and is characterized by the pungent smell, can easily be neutralized by suction and contact with hydrochloric acid.
- ammonium carbonate, ammonium carbamate and ammonium hydrogen carbonate or the reaction products formed at higher temperatures do not poison the (platinum) catalyst of the addition-crosslinking 2-component silicone.
- a mixture of the above-mentioned ammonium compounds is produced in at least one of the two liquid-pasty components of the liquid silicone, for example the addition-crosslinking two-component silicone, in that a powder of these compounds, the particle size in the lower micrometer range, preferably less than 50 ⁇ m, is homogeneously stirred into at least one component of the two-component silicone.
- these powdery ammonium compounds are to be stirred homogeneously into a silicone component with a higher viscosity, e.g. over 150,000 mPa * s len, in a preferred embodiment of the invention they are predispersed in silicone oil, the viscosity of which is advantageously between 100 and 3000 mPa * s.
- the dispersion obtained in this way can then easily be admixed with the silicone components; it serves as an inert distribution aid for the ammonium compounds and can be easily removed later by annealing the foamed molding.
- foamed moldings can be produced using injection molding machines which are equipped with a metering device for adding colors or other additives to the two silicone components. Dispersing the ammonium compounds in silicone oil 'and feeds the dosing device with this dispersion so that rather than coloring pigments, the ammonium compounds to the two liquid-pasty silicon konkomponenten of the addition-crosslinking 2-component silicone are admixed.
- the concentration of the ammonium compounds in the liquid-pasty silicone components or in the silicone oil can be varied within a wide range and is between 0.1 and 50% by weight (based on the total mass of the silicone to be processed), particularly preferably between 2 and 8% by weight .-% and very particularly preferably at 10 wt .-%.
- a "saturated" dispersion of the ammonium compounds in silicone oil is used, ie the ammonium compounds are dispersed in a certain volume for as long as lumen silicone oil until the ammonium compound and silicone oil form a homogeneous paste and no clear silicone oil can be seen.
- the process according to the invention for producing foamed moldings is preferably carried out using addition-crosslinking silicone rubber starting materials, in particular addition-crosslinking two-component liquid silicone compositions.
- addition-crosslinking silicone rubber starting materials in particular addition-crosslinking two-component liquid silicone compositions.
- the process according to the invention can also be carried out using peroxide-crosslinking silicone rubber starting materials.
- Another preferred embodiment of the invention relates to the foamed molded articles made of silicone rubber produced using the method according to the invention.
- “foamed moldings” are understood to mean moldings with open and / or closed cells or pores distributed over their entire mass. Foamed moldings have a bulk density which is lower than that of the silicone rubber framework substance Moldings are characterized by excellent mechanical stability.
- moldings produced in this way can be used as insulation material against thermal or acoustic influences, as packaging material, as absorber material against shock and shock, as absorber material for absorbing liquids, in particular non-polar liquids, such as e.g. (Mineral) oil, as an absorber material for gases and / or solvent vapors, as a cushioning material, e.g. as a mattress, • mattress topper or pillow, as a medical device, e.g. can be used as a non-sticky nose, ear, anal, fistula, wound tamponade, as a stopper for bacterial culture bottles.
- non-polar liquids such as e.g. (Mineral) oil
- an absorber material for gases and / or solvent vapors e.g. (Mineral) oil
- a cushioning material e.g. as a mattress, • mattress topper or pillow
- a medical device e.g. can be used as a non-sticky nose,
- Ammonium hydrogen carbonate (from Fluka) with a particle size of ⁇ 50 ⁇ m, which is obtained by grinding on a steel screen. appropriate mesh size is produced, is by admixing and stirring ' dispersed in silicone oil with a viscosity of approx.1,000 mm 2 * s _1 (Dow Corning® Dimeticone Fluid) until a homogeneous paste is formed.
- the paste is poured into the metering device of a multi-component metering system (2-component mechanical engineering, Marienheide-Rodt) intended for color mixing.
- the multi-component dosing system is an integral part of an injection molding machine for liquid silicone (Aarburg, Lossburg) on which liquid silicone from GE BAYER, Leverkusen, SILOPREN® LSR 4030 is processed to form solid moldings.
- Foamed moldings are produced by mixing the dispersion of ammonium hydrogen carbonate in silicone oil into the liquid silicone by means of a metering system and at the same time reducing the filling volume of the mold to approx. 35%.
- the other process parameters are essentially identical to the process parameters that are used for the production of solid moldings.
- the properties of the foamed molded body - hardness, porosity, pore size - can be selected by suitable selection of the liquid silicone, the amount of dispersion added and the filling volume of the mold. adjust in wide ranges.
- the foamed moldings have a skin, the structure of the pores is mostly closed-celled.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
L'invention concerne des corps moulés moussés en silicone qui peuvent être produits en grande série à l'aide de machines moulage par injection pour silicone liquide connues. L'invention se caractérise en ce que des mélanges de carbonate d'ammonium pulvérulent et/ou de carbonate d'hydrogène d'ammonium et d'au moins un des deux constituants liquide-pâteux de silicone liquide sont obtenus. Les deux constituants de silicone liquide sont ensuite travaillés de manière connue en soi, sous réserve que le moule de soit pas rempli entièrement de dispersion.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10109215 | 2001-02-27 | ||
| DE10109215 | 2001-02-27 | ||
| PCT/EP2002/001985 WO2002072679A1 (fr) | 2001-02-27 | 2002-02-26 | Corps moules mousses en silicone et utilisation des produits fabriques |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1379579A1 true EP1379579A1 (fr) | 2004-01-14 |
Family
ID=7675531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02716810A Withdrawn EP1379579A1 (fr) | 2001-02-27 | 2002-02-26 | Corps moules mousses en silicone et utilisation des produits fabriques |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US6855740B2 (fr) |
| EP (1) | EP1379579A1 (fr) |
| WO (1) | WO2002072679A1 (fr) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1793885B1 (fr) * | 2004-09-03 | 2016-09-28 | Löwenstein Medical Technology GmbH + Co. KG | Matieres plastiques pour appareils medicaux |
| JP5854223B2 (ja) * | 2012-03-09 | 2016-02-09 | カシオ計算機株式会社 | 入力ペン |
| CZ307253B6 (cs) * | 2012-05-30 | 2018-05-02 | PRAKAB PRAŽSKÁ KABELOVNA, s.r.o. | Způsob výroby napěněného silikonu |
| DE102014004925B4 (de) | 2014-04-07 | 2018-04-05 | Carl Freudenberg Kg | Schwimmkörper, Verfahren zu seiner Herstellung und dessen Verwendung |
| US11547491B2 (en) | 2019-05-02 | 2023-01-10 | Medtronic Navigation, Inc. | Oral patient tracking device and method of using the same |
| US11446094B2 (en) | 2019-05-02 | 2022-09-20 | Medtronic Navigation, Inc. | Nasal patient tracking device and method of using the same |
| CN110452542A (zh) * | 2019-08-24 | 2019-11-15 | 黄凤林 | 一种硅胶发泡产品的配方 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19614343A1 (de) * | 1996-04-11 | 1997-10-16 | Wacker Chemie Gmbh | Silikonkautschuke mit verbesserter Fellfestigkeit und niedrigem Druckverformungsrest |
| DE19750697A1 (de) | 1997-11-15 | 1999-05-20 | Ge Bayer Silicones Gmbh & Co | Geschlossenporige Siliconschäume, Verfahren zu ihrer Herstellung und ihre Verwendung |
| US5985947A (en) * | 1998-12-23 | 1999-11-16 | Hagen; Peter | Extruded foamed silicone rubber composition and method for making same |
-
2002
- 2002-02-26 US US10/469,045 patent/US6855740B2/en not_active Expired - Fee Related
- 2002-02-26 EP EP02716810A patent/EP1379579A1/fr not_active Withdrawn
- 2002-02-26 WO PCT/EP2002/001985 patent/WO2002072679A1/fr not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO02072679A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US6855740B2 (en) | 2005-02-15 |
| WO2002072679A1 (fr) | 2002-09-19 |
| US20040157943A1 (en) | 2004-08-12 |
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