# US 11,028,231 B2 · Polysiloxane comprising substituents having multiple aryl groups

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- Number: US 11,028,231 B2
- Document ID: US11028231B2
- Status: Granted
- Kind: B2
- Application number: 16/488,959
- Filed: 2018-04-30
- Published: 2020-03-26
- Granted: 2021-06-08
- Earliest claimed: 2017-06-01
- Assignees: Dow Silicone Corporation
- Applicants: Dow Silicones Corporation
- Inventors: Steven Swier; John B. Horstman
- Web page: https://patentgrep.com/patent/US11028231B2

## CPC

- C08G 77/18: to alkoxy or aryloxy groups
- C08G 77/42: Block-or graft-polymers containing polysiloxane sequences (polymerising aliphatic unsaturated monomers on to a polysiloxane C08F283/12)
- C08G 77/04: Polysiloxanes
- C08G 77/46: containing polyether sequences
- C08L 83/04: Polysiloxanes
- C08G 77/16: to hydroxy groups
- C08G 77/80: {Siloxanes having aromatic substituents, e.g. phenyl side groups}
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

A polysiloxane comprising: (a) from 40 to 90 mole % units of formula R1R2SiO2/2, (b) from 10 to 60 mole % units of formula R3SiO3/2, and (c) from 0 to 5 mole % units of formula R1R4SiO2/2; wherein R1 and R2 independently are phenyl or C1-C6 alkyl; R3 represents at least one C1-C30 hydrocarbyl group; R4 is —Ar1-X—Ar2, where Ar1 and Ar2 independently are C6-C12 aryl and X is O CH2; provided that the polysiloxane comprises at least one —Ar1-X—Ar2 group.

## Claims

### Claim 1

A polysiloxane comprising: (a) from 40 to 90 mole % units of formula R1R2SiO2/2, (b) from 30 to 60 mole % units of formula R3SiO3/2, and (c) from 0 to 5 mole % units of formula R′R4SiO2/2; wherein R1 and R2 independently are phenyl or C1-C6 alkyl; R3 represents at least one C1-C30 hydrocarbyl group; R4 is —Ar1-X—Ar2, where Ar1 and Ar2 independently are C6-C12 aryl and X is O or CH2; provided that the polysiloxane comprises at least one —Ar1-X—Ar2 group.

### Claim 2 (depends on 1)

The polysiloxane of claim 1 in which R3 represents no more than five different C1-C20 hydrocarbyl groups selected from the group consisting of C1-C12 alkyl, C5-C12 cycloalkyl, C6-C30 aryl and a combination thereof.

### Claim 3 (depends on 2)

The polysiloxane of claim 2 in which C6-C30 aryl groups are phenyl, —Ar1-X—Ar2 or a combination thereof where X is CH2.

### Claim 4 (depends on 3)

The polysiloxane of claim 3 comprising: (a) from 45 to 80 mole % units of formula R1R2SiO2/2, (b) from 20 to 55 mole % units of formula R3SiO3/2, and (c) from 0 to 3 mole % units of formula R′R4SiO2/2.

### Claim 5 (depends on 4)

The polysiloxane of claim 4 in which R3 represents no more than four different C1-C30 hydrocarbyl groups selected from the group consisting of C1-C6 alkyl, phenyl, —Ar1-X—Ar2 or a combination thereof; wherein Ar1 and Ar2 are C6-C8 aryl.

### Claim 6 (depends on 5)

The polysiloxane of claim 5 in which R1R2SiO2/2 and R1R4SiO2/2 units are present as part of a linear polysiloxane chain.

### Claim 7

A polysiloxane comprising: (a) from 40 to 85 mole % units of formula R1R2SiO2/2, (b) from 5 to 55 mole % units of formula R5SiO3/2, and (c) from 10 to 55 mole % units of formula R4SiO3/2; wherein R1 and R2 independently are phenyl or C1-C6 alkyl; R5 is phenyl or C1-C6 alkyl; R4 is —Ar1-X—Ar2, where Ar1 and Ar2 independently are C6-C12 aryl and X is O or CH2.

### Claim 8 (depends on 7)

The polysiloxane of claim 7 in which R1 is methyl and R2 is phenyl or C1-C4 alkyl.

### Claim 9 (depends on 8)

The polysiloxane of claim 8 in which Ar1 and Ar2 are phenyl and X is CH2.

### Claim 10 (depends on 9)

The polysiloxane of claim 9 in which R5 is phenyl or C1-C4 alkyl.