Non-siloxane sensory modifier

Patent metadata

Field	Value
Publication number	US-2025197538-A1
Application number	US-202318849833-A
Country	US
Kind code	A1
Filing date	Feb 16, 2023
Priority date	Apr 7, 2022
Publication date	Jun 19, 2025
Grant date	—

Abstract

A composition contains a crosslinked elastomer comprising polyolefin backbones crosslinked through polyether chains wherein the crosslinked elastomer has a carbon-silicon-carbon linkage between the polyolefin backbone and polyether chain and wherein the crosslinked elastomer is free of Si—O—Si bonds.

First claim

What is claimed is:

1 . A composition comprising a crosslinked elastomer comprising polyolefin backbones crosslinked through polyether chains wherein the crosslinked elastomer has a carbon-silicon-carbon linkage between the polyolefin backbone and polyether chain and wherein the crosslinked elastomer is free of Si—O—Si bonds.

2 . The composition of claim 1 , wherein the polyolefin backbone is an interpolymer of ethylene, octene, and at least one of 7-octenyldimethylsilane and 5-hexenyldimethylsilane and wherein the polyether chains crosslink by bonding to the silane.

3 . The composition of claim 2 , wherein the polyolefin backbone is an interpolymer that consists of the following polymerized monomer segments:
(a) 20 to 35 mol-percent of octene; (b) 65 to 80 mole-percent ethylene; and (c) 1 to 10 mole-percent of one or any combination of more than one of 7-octenyldimethylsilane and 5-hexenyldimethylsilane.

4 . The composition of claim 1 , wherein the polyether chains comprise polyether units selected from —R—O— groups where R is an alkylene having from 2 to 8 carbon atoms.

5 . The composition of claim 4 , where the polyether chain comprises polypropylene oxide.

6 . The composition of claim 1 , wherein the crosslinked elastomer consists of the following interpolymerized polymer segments:
(a) 20 to 35 mole-percent of one more a combination of more than one of segment with the average chemical structure —CH 2 CHR′—; (b) 65 to 80 mole-percent —CH 2 CH 2 —; and (c) 1 to 10 mole-percent of —CH 2 CHA-;
wherein mole-percent is relative to moles of interpolymerized polymer segments in the crosslinked elastomer, R′ is an alkyl group having one or more and at the same time 8 or fewer carbon atoms and A has the following average chemical structure (I):
—(CH 2 ) n Si(CH 3 ) 2 —B-D  (I)

and where
n is a value in a range of 4 to 6;
B is —(CH 2 ) 3 O(RO) p′ (CH 2 ) 3 —; where R is an alkylene having 2 or more and at the same time 8 or fewer carbon atoms and subscript p′ has a value in a range of 15-25; and
D is a —Si(CH 3 ) 2 (CH 2 ) n — group of another A group.

7 . The composition of claim 1 , wherein the composition further comprises a solvent and the crosslinked elastomer is solvent swollen so as to be a solvent swollen elastomer.

8 . The composition of claim 7 , wherein the solvent swollen elastomer has an average particle size in a range of one to 500 micrometers.

9 . A process for producing the composition of claim 1 , the process comprising providing a crosslinked elastomer by conducting a hydrosilylation reaction with a reaction composition comprising:
(a) a hydrosilane functional polyolefin that is free of Si—O—Si bonds; (b) a polyether crosslinker comprising at least two terminal alkenyl groups and that is free of Si—O—Si bonds; (c) a hydrosilylation catalyst; and (d) an organic solvent.

10 . The process of claim 9 , wherein the hydrosilane functional polyolefin is an interpolymer of:
(a) 20 to 35 mole-percent 1-octene; (b) 65 to 80 mole-percent of ethylene; and (c) one to 10 mole-percent of one or any combination of both of 7-octenyldimethylsilane and 5-hexenyldimethylsilane with mole-percent relative to total moles of 1-octene, ethylene, 7-octenyldimethylsilane and 5-hexeneyldimethylsilane.

Assignees

• Dow Silicones Corp
• Dow Global Technologies Llc

Inventors

• Zhang Fang
• Reddel Jordan C
• Belowich Matthew E

Classifications

• C08J3/24

  Crosslinking, e.g. vulcanising, of macromolecules (mechanical aspects B29C35/00; crosslinking agents C08K) · CPC title

• A61K8/062

  Oil-in-water emulsions · CPC title

• A61K8/91

  Graft copolymers (A61K8/89 takes precedence) · CPC title

• A61Q17/04

  Topical preparations for affording protection against sunlight or other radiation; Topical sun tanning preparations · CPC title

• A61Q19/00

  Preparations for care of the skin · CPC title