Temperature-resistant silicone resins

Patent metadata

Field	Value
Publication number	US-9309359-B2
Application number	US-201414329885-A
Country	US
Kind code	B2
Filing date	Jul 11, 2014
Priority date	Jul 11, 2014
Publication date	Apr 12, 2016
Grant date	Apr 12, 2016

Abstract

Methods and formulations for modified silicone resins of Formula (I) are presented:

The R 1 , R 2 , and R 3 are each independently selected from a group consisting of H, alkyl, alkenyl, alkynyl, and aryl; n ranges from 1 to 10; m ranges from 1 to 200; and p ranges from 2 to 1,000. The elastomeric materials prepared from modified silicone resins display robust mechanical properties following prolonged exposure to high temperatures (e.g., 316° C. or higher).

First claim

What is claimed is:

1. A modified silicone resin of Formula (I):

wherein R 1 , R 2 , and R 3 are each independently selected from a group consisting of H, alkyl, alkenyl, alkynyl, and aryl;
n ranges from 1 to 10;
m ranges from 1 to 200; and
p ranges from 2 to 1,000;

wherein the resin of Formula (I) has a viscosity ranging from about 500 cSt to about 10,000 cSt.

2. The modified silicone resin of claim 1 , wherein:
m ranges from 1 to 100; and
p ranges from 10 to 500.

3. The modified silicone resin of claim 2 , wherein:
R 1 , R 2 , and R 3 are each independently selected from a group consisting of H, C 1-8 alkyl, C 2-8 alkenyl, C 2-8 alkynyl, and aryl.

4. The modified silicone resin of claim 3 , wherein:
R 1 , R 2 , and R 3 are each independently selected from a group consisting of methyl, ethyl, propyl, butyl, ethylenyl, propylenyl, butylenyl, acetylenyl, diacetylenyl, and aryl.

5. The modified silicone resin of claim 4 , wherein:
R 1 , R 2 , and R 3 are each independently selected from a group consisting of methyl and phenyl.

6. The modified silicone resin of claim 5 , wherein the modified silicone resin is selected from a group consisting of:

(i)

(ii)

(iii)

(iv)

(v)

(vii)

(viii)

and wherein;
n ranges from 1 to 10;
m ranges from 5 to 100; and
p ranges from 10 to 500.

7. The modified silicone resin of claim 1 , wherein ratio of n to m ranges from about 1:1 to about 1:2000.

8. An elastomer formulation comprising:
at least one modified silicone resin of Formula (I):

wherein R 1 , R 2 , and R 3 are each independently selected from a group consisting of H, alkyl, alkenyl, alkynyl, and aryl;
n ranges from 1 to 10;
m ranges from 1 to 200; and
p ranges from 2 to 1,000;

at least one metal oxide; and
at least one curing agent.

9. The elastomer formulation of claim 8 , wherein:
n ranges from 1 to 3;
m ranges from 1 to 100; and
p ranges from 10 to 500.

10. The elastomer formulation of claim 9 , wherein:
R 1 , R 2 , and R 3 are each independently selected from a group consisting of H, C 1-8 alkyl, C 2-8 alkenyl, C 2-8 alkynyl, and aryl.

11. The elastomer formulation of claim 10 , wherein:
R 1 , R 2 , and R 3 are each independently selected from a group consisting of methyl, ethyl, propyl, butyl, ethylenyl, propylenyl, butylenyl, acetylenyl, diacetylenyl, and aryl.

12. The elastomer formulation of claim 11 , wherein:
R 1 , R 2 , and R 3 are each independently selected from a group consisting of methyl and phenyl.

13. The elastomer formulation of claim 12 , wherein: the at least one modified silicone resin comprises at least one of the following:

(i)

(ii)

(iii)

(iv)

(v)

(

Assignees

• Boeing Co

Inventors

• Zhou Chaoyin
• Nowak Andrew P
• Sharp Richard E
• Li Wen
• French James E

Classifications

• C08G77/48 Primary

  in which at least two but not all the silicon atoms are connected by linkages other than oxygen atoms (C08G77/42 takes precedence) · CPC title

• C08G77/80

  Siloxanes having aromatic substituents, e.g. phenyl side groups · CPC title

• C08K3/22

  of metals · CPC title

• C08K3/36

  Silica · CPC title

• C08G77/52

  containing aromatic rings · CPC title