# US 11,028,234 B2 · Addition-curable silicone composition

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 11,028,234 B2
- Document ID: US11028234B2
- Status: Granted
- Kind: B2
- Application number: 16/498,222
- Filed: 2018-03-19
- Published: 2020-01-30
- Granted: 2021-06-08
- Earliest claimed: 2017-03-27
- Assignees: Shin-Etsu Chemical Co., Ltd.
- Applicants: Shin-Etsu Chemical Co., Ltd.
- Inventors: Keita Kitazawa
- Web page: https://patentgrep.com/patent/US11028234B2

## CPC

- C08F 222/102: {of dialcohols, e.g. ethylene glycol di(meth)acrylate or 1,4-butanediol dimethacrylate}
- C08G 77/50: by carbon linkages
- B01J 23/42: Platinum
- B01J 31/22: Organic complexes
- B01J 35/398: {Egg yolk like}
- B01J 35/40: characterised by dimensions, e.g. grain size (in a colloidal state B01J35/23; crystallite size B01J35/77)
- B01J 35/53: with a core-shell structure
- B01J 37/0072: {Preparation of particles, e.g. dispersion of droplets in an oil bath}
- C08F 2/44: Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
- C08F 2/48: by ultraviolet or visible light
- C08K 3/36: Silica
- C08K 9/10: Encapsulated ingredients
- C08L 83/04: Polysiloxanes
- C09D 4/06: {Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond} in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00
- C08G 77/12: containing silicon bound to hydrogen
- C08G 77/20: containing silicon bound to unsaturated aliphatic groups
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)

## Abstract

This addition-curable silicone composition contains (A) an organopolysiloxane having at least two unsaturated aliphatic hydrocarbon groups in each molecule, (B) an organohydrogenpolysiloxane in an amount that provides a value of 0.5-5 for the ratio of the number of SiH groups to the total number of unsaturated aliphatic hydrocarbon groups in the component (A), and (C) an effective amount of hydrosilylation catalyst microparticles that have a microcapsule structure containing a platinum-group metal catalyst-containing organic compound or polymer compound as a core material and a three-dimensional crosslinked polymer compound obtained by polymerizing at least one polyfunctional monomer as a wall material, the platinum-group metal catalyst-containing organic compound or polymer compound having a dynamic viscosity of 10-100,000 mm2/s at 25° C.

## Claims

### Claim 1

An addition curable silicone composition comprising:
(A) an organopolysiloxane containing at least two aliphatic unsaturated hydrocarbon groups per molecule and having a kinematic viscosity of 60 to 100,000 mm2/s at 25° C.,
(B) an organohydrogenpolysiloxane having at least two silicon-bonded hydrogen atoms per molecule, in such an amount that a ratio of the number of Si—H groups to the total number of aliphatic unsaturated hydrocarbon groups in component (A) ranges from 0.5 to 5, and
(C) an effective amount of a microparticulate hydrosilylation catalyst of microcapsule structure consisting of a core material of an organic compound or polymer containing a platinum group metal catalyst and a shell material of a three-dimensional crosslinked polymer obtained by polymerizing at least one polyfunctional monomer, the organic compound or polymer containing a platinum group metal catalyst having a kinematic viscosity of 10 to 100,000 mm2/s at 25° C.,
wherein the polyfunctional monomer is a polyfunctional monomer having at least two polymerizable carbon-carbon double bonds per molecule.

### Claim 2 (depends on 1)

The addition curable silicone composition of claim 1 wherein component (C) has an average particle size of 0.01 to 1,000 μm.

### Claim 3 (depends on 1)

The addition curable silicone composition of claim 1 wherein the polyfunctional monomer is a polyfunctional monomer having at least two (meth)acrylic groups per molecule.

### Claim 4 (depends on 1)

The addition curable silicone composition of claim 1, further comprising (D) at least one inorganic filler selected from the group consisting of metals, metal oxides, metal hydroxides, metal nitrides, metal carbides, and carbon allotropes, in an amount of 0.1 to 5,000 parts by weight per 100 parts by weight of component (A).