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US 11,028,231 B2Granted
Polysiloxane comprising substituents having multiple aryl groups
AssigneeDow Silicone Corporation
InventorsSteven Swier, John B. Horstman
Life of this patent
Estimating the term…
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.
Claims10
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.
2 more elements
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.
1 more element
Dependencies are inferred from the claim text.