# US 10,500,151 B2 · Silicone elastomer composition

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- Number: US 10,500,151 B2
- Document ID: US10500151B2
- Status: Granted
- Kind: B2
- Application number: 15/327,317
- Filed: 2015-04-08
- Published: 2017-06-22
- Granted: 2019-12-10
- Earliest claimed: 2014-07-23
- Assignees: Dow Silicones Corporation
- Applicants: Dow Corning Corporation
- Inventors: Patrick J. Fryfogle; Donald Anthony Kadlec
- Web page: https://patentgrep.com/patent/US10500151B2

## CPC

- A61K 8/895: containing silicon bound to unsaturated aliphatic groups, e.g. vinyl dimethicone
- A61K 8/062: {Oil-in-water emulsions}
- A61Q 19/00: Preparations for care of the skin
- C08G 77/70: {Siloxanes defined by use of the MDTQ nomenclature}
- C08K 5/56: Organo-metallic compounds, i.e. organic compounds containing a metal-to-carbon bond
- C08L 83/00: Compositions 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; Compositions of derivatives of such polymers
- C08L 83/04: Polysiloxanes
- C08L 83/10: Block- or graft-copolymers containing polysiloxane sequences (obtained by polymerising a compound having a carbon-to-carbon double bond on to a polysiloxane C08L51/08, C08L53/00)
- C08L 83/12: containing polyether sequences
- A61K 2800/54: Polymers characterized by specific structures/properties
- C08G 77/12: containing silicon bound to hydrogen
- C08G 77/14: containing silicon bound to oxygen-containing groups
- C08G 77/18: to alkoxy or aryloxy groups
- C08G 77/20: containing silicon bound to unsaturated aliphatic groups
- C08G 77/46: containing polyether sequences
- A61K: PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES (devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms A61J3/00; chemical aspects of, or use of materials for deodorisation of air, for disinfection or sterilisation, or for bandages, dressings, absorbent pads or surgical articles A61L; soap compositions C11D)
- A61Q: SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- 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)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

A silicone elastomer composition (“composition”) has customizable sensory characteristics. The composition includes a pituitous silicone fluid that includes a hydrosilylation reaction product and a carrier fluid. The hydrosilylation reaction product generally includes alkenyl or Si—H functionality. The hydrosilylation reaction product is the reaction product of a first linear organopolysiloxane including (R1R2R3SiO—1/2) and (R4R5Si)2/2) units, and a second linear organopolysiloxane including (R6R7R8SiO—1/2) and (R9R10SiO2/2) units. Each of R1-R10 is independently a hydrocarbon group so long as at least one of R1-R5 is an alkenyl group and at least one of R6-R10 is a hydrogen atom. The first linear organopolysiloxane has a DP of from 100 to 15,000. The second linear organopolysiloxane has a DP of from 4 to 1,000. The composition also includes a silicone elastomer different from the hydrosilylation reaction product. Personal care compositions can include the composition.

## Claims

### Claim 1

A silicone elastomer composition having customizable sensory characteristics, said silicone elastomer composition comprising:
A) a pituitous silicone fluid comprising;
(1) a hydrosilylation reaction product of;
(a) a first linear organopolysiloxane comprising (R1R2R3SiO1/2) and (R4R5SiO2/2) units, wherein each of R1-R5 is independently a hydrocarbon group so long as at least one of R1-R5 is an alkenyl group, said first linear organopolysiloxane comprises less than 1 weight percent of T and Q units, and said first linear organopolysiloxane has a degree of polymerization of from 100 to 15,000 repeating (R4R5SiO2/2) siloxy units, and
(b) a second linear organopolysiloxane comprising (R6R7R8SiO1/2) and (R9R10SiO2/2) units, wherein each of R6-R10 is independently a hydrocarbon group, polyether group, siloxane group, or polyol group, so long as at least one of R6-R10 is a hydrogen atom, said second linear organopolysiloxane comprises less than 1 weight percent of T and Q units, and said second linear organopolysiloxane has a degree of polymerization of from 4 to 1,000; and
(2) a carrier fluid chosen from a silicone fluid, an organic solvent, an organic oil, and combinations thereof;
wherein said hydrosilylation reaction product comprises alkenyl or Si-H functionality,
wherein said hydrosilylation reaction product is present in an amount of from 3 to 30 parts by weight per 100 parts by weight of said pituitous silicone fluid, and
wherein said pituitous silicone fluid exhibits an increasing normal stress observed in a perpendicular direction when a constantly increasing shear force is applied; and
B) a silicone elastomer different from said hydrosilylation reaction product;
wherein said silicone elastomer composition is formed by combining said hydrosilylation reaction product and said silicone elastomer after said hydrosilylation reaction product is formed.

### Claim 2 (depends on 1)

The silicone elastomer composition of claim 1, wherein said first linear organopolysiloxane is vinyl terminated.

### Claim 3 (depends on 1)

The silicone elastomer composition of claim 1, wherein said second linear organopolysiloxane has 2 to 10 pendant SiH sites.

### Claim 4 (depends on 1)

The silicone elastomer composition of claim 1, wherein said second linear organopolysiloxane is dimethyl, methylhydrogen siloxane, trimethylsiloxy terminated.

### Claim 5 (depends on 1)

The silicone elastomer composition of claim 1, wherein said hydrosilylation reaction product comprises vinyl functionality and a molar ratio of vinyl to Si-H of said first and second linear organopolysiloxanes, respectively, is greater than 1.

### Claim 6 (depends on 1)

The silicone elastomer composition of claim 1, wherein said hydrosilylation reaction product comprises Si-H functionality and a molar ratio of vinyl to Si-H of said first and second linear organopolysiloxanes, respectively, is less than 1.

### Claim 7 (depends on 1)

The silicone elastomer composition of claim 1, wherein said hydrosilylation reaction product is present in an amount of from 3 to 30 parts by weight per 100 parts by weight of said pituitous silicone fluid.

### Claim 8 (depends on 1)

The silicone elastomer composition of claim 1, wherein said carrier fluid is a silicone fluid.

### Claim 9 (depends on 1)

The silicone elastomer composition of claim 1, wherein a plot of normal stress versus shear rate falls above a limit line on a graph and the limit line is created using the equation y=3.6x, where y is the normal stress and x is the shear rate.

### Claim 10 (depends on 1)

The silicone elastomer composition of claim 1, wherein said silicone elastomer is a reaction product of an SiH containing polysiloxane and an α,ω-diene.

### Claim 11 (depends on 1)

A personal care composition comprising a personal care additive and the silicone elastomer composition of claim 1.

### Claim 12 (depends on 1)

A method of forming the silicone elastomer composition according to claim 1, said method comprising: reacting the first linear organopolysiloxane (a) and the second linear organopolysiloxane (b) via a hydrosilylation reaction in the presence of a hydrosilylation catalyst and the carrier fluid (2) to form the hydrosilylation reaction product (1); and combining the hydrosilylation reaction product (1) with the silicone elastomer B) to form the silicone elastomer composition.

### Claim 13 (depends on 12)

The method of claim 12, wherein the second linear organopolysiloxane comprises the reaction product of a first species of the second linear organopolysiloxane and a compound having a mono terminal aliphatic unsaturated hydrocarbon group.

### Claim 14 (depends on 12)

The method of claim 12, wherein:
i) the first linear organopolysiloxane is vinyl terminated; and/or
ii) the second linear organopolysiloxane has 2 to 10 pendant SiH sites.

### Claim 15 (depends on 2)

The silicone elastomer composition of claim 2, wherein said first linear organopolysiloxane is dimethylvinyl terminated.

### Claim 16 (depends on 3)

The silicone elastomer composition of claim 3, wherein said second linear organopolysiloxane has 6 pendant SiH sites.

### Claim 17 (depends on 8)

The silicone elastomer composition of claim 8, wherein said carrier fluid is a polydimethylsiloxane.