Pituitous silicone fluid

Patent metadata

Field	Value
Publication number	US-10172781-B2
Application number	US-201515327335-A
Country	US
Kind code	B2
Filing date	Apr 8, 2015
Priority date	Jul 23, 2014
Publication date	Jan 8, 2019
Grant date	Jan 8, 2019

Abstract

A pituitous silicone fluid includes a hydrosilylation reaction product and a carrier fluid. The hydrosilylation reaction product is the reaction product of a first linear organopolysiloxane and a second linear organopolysiloxane. The first linear organopolysiloxane includes (R1R2R3SiO1/2) and (R4R5SiO2/2) units. Each of R1-R5 is independently a hydrocarbon group so long as at least one of R1-R5 is an alkenyl group. In addition, the first linear organopolysiloxane has a degree of polymerization of from 100 to 15,000. The second linear organopolysiloxane includes (R6R7R8SiO1/2) and (R9R10SiO2/2) units. 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. In addition, the second linear organopolysiloxane has a degree of polymerization of from 4 to 1,000. The hydrosilylation reaction product includes alkenyl or Si—H functionality. Personal care compositions can include the pituitous silicone fluid.

First claim

What is claimed is:

1. A pituitous silicone fluid comprising:
(1) a hydrosilylation reaction product of;
(a) a first linear organopolysiloxane comprising (R 1 R 2 R 3 SiO 1/2 ) and (R 4 R 5 SiO 2/2 ) units, wherein each of R 1 to R 5 is independently a hydrocarbon group so long as at least one of R 1 to R 5 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, and
(b) a second linear organopolysiloxane comprising (R 6 R 7 R 8 SiO 1/2 ) and (R 9 R 10 SiO 2/2 ) units, wherein each of R 6 to R 10 is independently is a hydrocarbon group, polyether group, siloxane group, or polyol group, so long as at least one of R 6 to R 10 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,
wherein the combination of said hydrosilylation reaction product and said carrier fluid provides said pituitous silicone fluid with a viscosity of from 0.1 to 75 Pa·s,
wherein said pituitous silicone fluid exhibits an increasing normal stress observed in a perpendicular direction when a constantly increasing shear force is applied,
wherein said pituitous silicone fluid is a liquid that can flow when a force is applied, and
wherein fluids do not encompass gels, which do not flow.

2. The pituitous silicone fluid of claim 1 , wherein said first linear organopolysiloxane is vinyl terminated.

3. The pituitous silicone fluid of claim 2 , wherein said first linear organopolysiloxane is vinyl terminated, alternatively is dimethylvinyl terminated.

4. The pituitous silicone fluid of claim 1 , wherein said second linear organopolysiloxane has 2 to 10 pendant Si-H sites.

5. The pituitous silicone fluid of claim 4 , wherein said second linear organopolysiloxane has 6 pendant Si—H sites.

6. The pituitous silicone fluid of claim 1 , wherein said second linear organopolysiloxane is dimethyl, methylhydrogen siloxane, trimethylsiloxy terminated.

7. The pituitous silicone fluid of claim 1 , wherein:
i) said hydrosilylation reaction product comprises vinyl functionality;
ii) a molar ratio of vinyl to Si-H of said first and second linear organopolysiloxanes, respectively, is greater than 1; or
iii) both i) and ii).

8. The pituitous silicone fluid of claim 1 , wherein:
i) said hydrosilylation reaction product comprises Si-H functionality;
ii) a molar ratio of vinyl to Si-H of said first and second linear organopolysiloxanes, respectively, is less than 1; or
iii) both i) and ii).

9. The pituitous silicone fluid of claim 1 , wherein said carrier fluid is present in an amount of from 70 to 97 parts by weight per 100 parts by weight of said pituitous silicone fluid.

10. The pituitous silicone fluid of claim 1 , wherein said carrier fluid is a silicone fluid.

11. The pituitous silicone fluid of claim 10 , wherein said carrier fluid is a polydimethylsiloxane.

12. The pituitous silicone fluid 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.

13. The pituitous silicone fluid of claim 1 , wherein said first linear organopolysiloxane has a degree of polymerization of from 2,000 to 15,000.

14. A personal care composition comprising a personal care additive and the pituitous silicone fluid of claim 1 .

15. A personal care composition comprising a pituitous silicone fluid comprising:
(1) the hydrosilylation reaction product of;
(a) a first linear organopolysiloxane comprising (R 1 R 2 R 3 SiO 1/2 ) and (R 4 R 5 SiO 2/2 ) units, wherein each of R 1 to R 5 is independently a hydrocarbon group so long as at least one of R 1 to R 5 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, and
(b) a second linear organopolysiloxane comprising (R 6 R 7 R 8 SiO 1/2 ) and (R 9 R 10 SiO 2/2 ) units, wherein each of R 6 to R 10 is independently is a hydrocarbon group, polyether group, siloxane group, or polyol group, so long as at least one of R 6 to R 10 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,
wherein the combination of said hydrosilylation reaction product and said carrier fluid provides said pituitous silicone fluid with a viscosity of from 0.1 to 75 Pa·s,
wherein said pituitous silicone fluid exhibits an increasing normal stress observed in a perpendicular direction when a constantly increasing shear force is applied,
wherein said pituitous silicone fluid is a liquid that can flow when a force is applied, and
wherein fluids do not encompass gels, which do not flow.

16. A method of forming a pituitous silicone fluid, said method comprising reacting a first linear organopolysiloxane and a second linear organopolysiloxane via a hydrosilylation reaction in the presence of a hydrosilylation catalyst and a carrier fluid to form a hydrosilylation reaction product comprising alkenyl or Si-H functionality;
wherein the first linear organopolysiloxane comprises (R 1 R 2 R 3 SiO 1/2 ) and (R 4 R 5 SiO 2/2 ) units, wherein each of R 1 to R 5 is independently a hydrocarbon group so long as at least one of R 1 to R 5 is an alkenyl group, wherein the first linear organopolysiloxane comprises less than 1 weight percent of T and Q units, and wherein the first linear organopolysiloxane has a degree of polymerization of from 100 to 15,000;
wherein the second linear organopolysiloxane comprises (R 6 R 7 R 8 SiO 1/2 ) and (R 9 R 10 SiO 2/2 ) units, wherein each of R 6 to R 10 is independently is a hydrocarbon group, polyether group, siloxane group, or polyol group, so long as at least one of R 6 to R 10 is a hydrogen atom, wherein the second linear organopolysiloxane comprises less than 1 weight percent of T and Q units, and wherein the second linear organopolysiloxane has a degree of polymerization of from 4 to 1,000;
wherein the carrier fluid is chosen from a silicone fluid, an organic solvent, an organic oil, and combinations thereof,
wherein the hydrosilylation reaction product is present in an amount of from 3 to 30 parts by weight per 100 parts by weight of the pituitous silicone fluid,
wherein the combination of said hydrosilylation reaction product and said carrier fluid provides said pituitous silicone fluid with a viscosity of from 0.1 to 75 Pa·s,
wherein the pituitous silicone fluid exhibits an increasing normal stress observed in a perp

Assignees

• Dow Corning
• Dow Silicones Corp

Inventors

• Fryfogle Patrick J
• Kadlec Donald Anthony
• Nguyen Kimmai Thi
• Thomas Ryan Christopher

Classifications

• C08G77/12

  containing silicon bound to hydrogen · CPC title

• A61Q19/00

  Preparations for care of the skin · CPC title

• A61K8/895 Primary

  containing silicon bound to unsaturated aliphatic groups, e.g. vinyl dimethicone · CPC title

• C08G77/14

  containing silicon bound to oxygen-containing groups · CPC title

• A61K2800/54

  Polymers characterized by specific structures/properties · CPC title