EP0175355A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Improved curable silicone compositions comprising resins
Assignee: Dow Silicones Corp
•
Filing: 1985-09-18
•
Granted: —
•
Expires: 2005-09-18
Abstract
Abstract Silicone compositions are disclosed which comprise a liquid silicone resin, a vinyl-containing silicone resin, a siloxane polymer, and a hydrosilylation catalyst. The compositions cure to give unusually strong, fuel resistant coatings and elastomers.
Inventors
- 👤 John Donald Blizzard
- 👤 Terence John Swihart
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 17:41
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/04; C09; C09D; C09D183/00; C09D183/04; C08G; C08G77/00; C08G77/04; C08G77/12; C08G77/14; C08G77/16; C08G77/20; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31609; Y10T428/31612; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
235 words
A composition comprising in combination, A) from 1 to 200 parts by weight of the reaction product of i) an organosilicon resin consisting essentially of R 3 SiO ½ units and Si0 4/2 units wherein R represents a monovalent hydrocarbon radical and the ratio of R 3 SiO ½ units to SiO 4/2 units is from 0.6/1 to 0.9/1 and ii) a polyorganohydrogensiloxane; B) 100 parts by weight of an organosilicon polymer having the formula R"R' 2 SiO(R' 2 SiO) x SiR' 2 R", wherein each R' is selected from the group consisting of monovalent hydrocarbon radicals, each R" is selected from the group consisting of OH radicals and R' radicals, x has a value of from 0 to 5000, there being on average at least two radicals of said organosilicon polymer selected from the group consisting of vinyl radicals and hydroxyl radicals; C) from 1 to 50 parts by weight of an organosilicon resin consisting essentially of (CH 3 ) 2 (CH 2 =CH)SiO ½ units, (CH 3 ) 3 SiO ½ units and Si0 4/2 units, said units being in a ratio of (CH 3 ) 2 (CH 2 =CH)SiO ½ units to (CH 3 ) 3 SiO ½ units to SiO 4/2 units of from 0.10/0.6/1 to 0.25/0.9/1; and D) from 0.00003 to 0.035 parts by weight of a hydrosilylation catalyst, said parts being by weight of the metal in the catalyst.
Claim 2
Dependent Claim
235 words
A composition comprising in combination, A) from 1 to 200 parts by weight of the reaction product of i) an organosilicon resin consisting essentially of R 3 SiO ½ units and Si0 4/2 units wherein R represents a monovalent hydrocarbon radical and the ratio of R 3 SiO ½ units to SiO 4/2 units is from 0.6/1 to 0.9/1 and ii) a polyorganohydrogensiloxane; B) 100 parts by weight of an organosilicon polymer having the formula R"R' 2 SiO(R' 2 SiO) x SiR' 2 R", wherein each R' is selected from the group consisting of monovalent hydrocarbon radicals, each R" is selected from the group consisting of OH radicals and R' radicals, x has a value of from 0 to 5000, there being on average at least two radicals of said organosilicon polymer selected from the group consisting of vinyl radicals and hydroxyl radicals; C) from 1 to 50 parts by weight of an organosilicon resin consisting essentially of (CH 3 ) 2 (CH 2 =CH)SiO ½ units, (CH 3 ) 3 SiO ½ units and Si0 4/2 units, said units being in a ratio of (CH 3 ) 2 (CH 2 =CH)SiO ½ units to (CH 3 ) 3 SiO ½ units to SiO 4/2 units of from 0.10/0.6/1 to 0.25/0.9/1; and D) from 0.00003 to 0.035 parts by weight of a hydrosilylation catalyst, said parts being by weight of the metal in the catalyst.
Claim 3
Dependent Claim
49 words
A composition as claimed in claim 1 wherein R is the methyl radical, R' is selected from the group consisting of methyl radicals and vinyl radicals, R" is selected from the group consisting of methyl radicals and vinyl radicals, and x has a value of from 50 to 2000.
Claim 4
Dependent Claim
11 words
A composition as claimed in claim 2 further comprising a filler.
Claim 5
Dependent Claim
12 words
A composition as claimed in claim 3 wherein the filler is alumina.
Claim 6
Dependent Claim
11 words
A composition as claimed in claim 2 further comprising a solvent.
Claim 7
Dependent Claim
12 words
A composition as claimed in claim 2 further comprising a cure promoter.
Claim 8
Dependent Claim
23 words
A composition as claimed in claim 6 wherein the cure promoter is a cyclosiloxane containing (CH 3 ) (CH 2 =CH) SiO units.
Claim 9
Dependent Claim
20 words
A composition as claimed in claim 6 wherein the cure promoter is ((CH 3 ) 2 HSi) 2 0 .
Claim 10
Dependent Claim
12 words
A composition as claimed in claim 2 further comprising a hydrosilylation inhibitor.
Claim 11
Dependent Claim
44 words
A composition as claimed in claim 2 comprising from 5 to 100 parts by weight of Component (A); 100 parts of Component (B); from 5 to 25 parts by weight of Component (C); and from 0.00014 to 0.025 parts by weight of Component (D).
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.