# US 8,541,103 B2 · Silicone polymer particle and silicone composition containing same

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- Number: US 8,541,103 B2
- Document ID: US8541103B2
- Status: Granted
- Kind: B2
- Application number: 11/791,216
- Filed: 2005-12-02
- Published: 2007-12-27
- Granted: 2013-09-24
- Earliest claimed: 2004-12-03
- Assignees: Kaneka Corporation
- Applicants: Yoshifumi Fukui; Satoshi Sugiyama; Akira Takaki
- Inventors: Yoshifumi Fukui; Satoshi Sugiyama; Akira Takaki
- Web page: https://patentgrep.com/patent/US8541103B2

## CPC

- C08L 83/04: Polysiloxanes
- C08G 77/12: containing silicon bound to hydrogen
- C08G 77/18: to alkoxy or aryloxy groups
- C08G 77/20: containing silicon bound to unsaturated aliphatic groups
- C08K 5/56: Organo-metallic compounds, i.e. organic compounds containing a metal-to-carbon bond
- C08L 2201/52: Aqueous emulsion or latex, e.g. containing polymers of a glass transition temperature (Tg) below 20°C
- C08L 2207/53: Core-shell polymer
- Y10T 428/2989: Microcapsule with solid core [includes liposome]
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

The present invention provides silicone polymer particles having excellent tensile properties and excellent transparency and also provides a silicone composition. The present invention relates to silicone polymer particles having a silicone core-alkoxysilane condensate shell structure in which silicone particles with a volume-average particle diameter of 0.001 μm to 1.0 μm are coated with an alkoxysilane condensate, and also relates to a silicone composition containing (A) the silicone polymer particles, (B) a polyorganosiloxane having at least one alkenyl group in its molecule, and (C) a curing agent. The present invention further relates to respective manufacturing methods of the silicone polymer particles and the silicone composition.

## Claims

### Claim 1

A silicone composition comprising
(A) a silicone polymer particle having a silicone core-alkoxysilane condensate shell structure comprising a silicone particle with a volume-average particle diameter of 0.001 to 1.0μm, wherein the silicone particle substantially consists of a polyorganosiloxane, and is directly coated with an alkoxysilane condensate,
(B) a polyorganosiloxane having at least one alkenyl group in its molecule, and
(C) a curing agent.

### Claim 2 (depends on 1)

The silicone polymer particle according to claim 1, wherein the volume-average particle diameter of the silicone particle is 0.01 to 1.0 μm.

### Claim 3 (depends on 1)

The silicone polymer particle according to claim 1, the silicone polymer particle being further surface-treated.

### Claim 4 (depends on 1)

The silicone polymer particle according to claim 1, wherein an alkenyl group is contained in the shell or the surface of the polymer particle.

### Claim 5 (depends on 1)

The silicone composition according to claim 1, wherein the curing agent is a combination of an organohydrogen polysiloxane and a hydrosilylation catalyst or an organic peroxide.

### Claim 6 (depends on 1)

The silicone composition according to claim 1, wherein the component (A) is uniformly dispersed in the composition by a master batch method.

### Claim 7

A method of manufacturing a silicone polymer particle having a silicone core-alkoxysilane condensate shell structure comprising a silicone particle with a volume-average particle diameter of 0.001 to 1.0 μm, wherein the silicone particle substantially consists of a polyorganosiloxane, and is directly coated with an alkoxysilane condensate, the method comprising coating a silicone particle produced by emulsion polymerization with an alkoxysilane condensate by condensation reaction of alkoxysilane.

### Claim 8 (depends on 7)

The method of manufacturing the silicone polymer particle according to claim 7, wherein the silicone particle is obtained by emulsion polymerization of organosiloxane with a cyclic structure used as a raw material.

### Claim 9 (depends on 7)

The method of manufacturing the silicone polymer particle according to claim 7, wherein the condensation reaction of alkoxysilane is performed under acid conditions.

### Claim 10 (depends on 7)

The method of manufacturing the silicone polymer particle according to claim 7, further comprising surface treatment.

### Claim 11 (depends on 1)

A method of manufacturing a silicone composition, the method comprising mixing (A) the silicone polymer particle according to claim 1, (B) a polyorganosiloxane having at least one alkenyl group in its molecule, and (C) a curing agent, and uniformly dispersing the component (A) in the composition by a master batch method.