US6124407A
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Silicone composition, method for the preparation thereof, and silicone elastomer
Assignee: Dow Silicones Corp
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Filing: 1998-10-28
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Granted: 2000-09-26
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Expires: 2018-10-28
Abstract
Abstract A silicone composition comprising (A) 100 parts by weight of a polydiorganosiloxane containing an average of at least two silicon-bonded alkenyl groups per molecule; (B) 75 to 150 parts by weight of an organopolysiloxane resin having a number-average molecular weight of from 2,000 to 5,000 and consisting essentially of R32R4 SiO+E,fra 1/2+EE units and SiO4/2 units wherein each R3 is independently selected from the group consisting of monovalent hydrocarbon and monovalent halogenated hydrocarbon groups free of aliphatic unsaturation, R4 is selected from the group consisting of R3 and alkenyl, the mole ratio of R32R4 SiO+E,fra 1/2+EE units to SiO4/2 units is from 0.6:1 to 1.1:1, and the resin contains an average of from 2.5 to 7.5 mole percent of alkenyl groups; (C) an organohydrogenpolysiloxane having an average of at least three silicon-bonded hydrogen atoms per molecule in an amount sufficient to provide from one to three silicon-bonded hydrogen atoms per alkenyl group in components (A) and (B) combined; (D) an adhesion promoter in an amount sufficient to effect adhesion of the composition to a substrate; and (E) a hydrosilylation catalyst in an amount sufficient to cure the composition.
Inventors
- 👤 Yeong Joo Lee
- 👤 Michael Dean Livingston
- 👤 Hongxi Zhang
- 👤 Randall Gene Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:51
CPC Classifications
H; H10; H10W; H10W74/00; H10W74/40; H10W74/47; H10W74/476; C; C08; C08L; C08L83/00; C08L83/04; C08G; C08G77/00; C08G77/04; C08G77/12; C08G77/14; C08G77/16; C08G77/20
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
202 words
A silicone composition comprising: (A) 100 parts by weight of a polydiorganosiloxane containing an average of at least two silicon-bonded alkenyl groups per molecule; (B) 75 to 150 parts by weight of an organopolysiloxane resin having a number-average molecular weight of from 2,000 to 5,000 and consisting essentially of R 3 2 R 4 SiO 1/2 units and SiO 4/2 units wherein each R 3 is independently selected from the group consisting of monovalent hydrocarbon and monovalent halogenated hydrocarbon groups free of aliphatic unsaturation, R 4 is selected from the group consisting of R 3 and alkenyl groups, the mole ratio of R 3 2 R 4 SiO 1/2 units to SiO 4/2 units is from 0.6:1 to 1.1:1, and the resin contains an average of from 2.5 to 7.5 mole percent of alkenyl groups; (C) an organohydrogenpolysiloxane having an average of at least three silicon-bonded hydrogen atoms per molecule in an amount sufficient to provide from one to three silicon-bonded hydrogen atoms per alkenyl group in components (A) and (B) combined; (D) an adhesion promoter in an amount sufficient to effect adhesion of the composition to a substrate; and (E) a hydrosilylation catalyst in an amount sufficient to cure the composition.
Claim 2
Dependent Claim
202 words
A silicone composition comprising: (A) 100 parts by weight of a polydiorganosiloxane containing an average of at least two silicon-bonded alkenyl groups per molecule; (B) 75 to 150 parts by weight of an organopolysiloxane resin having a number-average molecular weight of from 2,000 to 5,000 and consisting essentially of R 3 2 R 4 SiO 1/2 units and SiO 4/2 units wherein each R 3 is independently selected from the group consisting of monovalent hydrocarbon and monovalent halogenated hydrocarbon groups free of aliphatic unsaturation, R 4 is selected from the group consisting of R 3 and alkenyl groups, the mole ratio of R 3 2 R 4 SiO 1/2 units to SiO 4/2 units is from 0.6:1 to 1.1:1, and the resin contains an average of from 2.5 to 7.5 mole percent of alkenyl groups; (C) an organohydrogenpolysiloxane having an average of at least three silicon-bonded hydrogen atoms per molecule in an amount sufficient to provide from one to three silicon-bonded hydrogen atoms per alkenyl group in components (A) and (B) combined; (D) an adhesion promoter in an amount sufficient to effect adhesion of the composition to a substrate; and (E) a hydrosilylation catalyst in an amount sufficient to cure the composition.
Claim 3
Dependent Claim
44 words
The composition according to claim 1, wherein the polydiorganosiloxane comprises a mixture of a first polydiorganosiloxane having a viscosity of from 45 to 65 Pa.s at 25° C. and a second polydiorganosiloxane having a viscosity of from 1.8 to 2.4 Pa.s at 25° C.
Claim 4
Dependent Claim
44 words
The composition according to claim 1, wherein the adhesion promoter comprises a mixture of (i) a polysiloxane having an average of at least one silicon-bonded alkenyl group and an average of at least one silicon-bonded hydroxyl group per molecule and (ii) an epoxy-containing alkoxysilane.
Claim 5
Dependent Claim
19 words
The composition according to claim 3, wherein the polysiloxane is a hydroxyl-terminated dimethylmethylvinylsiloxane and the epoxy-containing alkoxysilane is glycidoxypropyltrimethoxysilane.
Claim 6
Dependent Claim
85 words
The composition according to claim 1, wherein the adhesion promoter is an organosilicon compound having the average formula: ##STR6## wherein R 9 is a monovalent hydrocarbon group free of aliphatic unsaturation, R 10 is an alkenyl group, x has a value of from 0 to 10, y has a value of from 0 to 10, z has a value of from 0 to 10, the sum y+z is at least 1, and P has the formula: ##STR7## wherein R 11 is a divalent organic group.
Claim 7
Dependent Claim
45 words
The composition according to claim 5, wherein R 9 is methyl, R 10 is vinyl, x has an average value of 2, y has an average value of 2, z is 0, and R 11 is --CH 2 OCH 2 CH 2 CH 2 --.
Claim 8
Dependent Claim
25 words
The composition according to claim 1, further comprising an inorganic filler selected from the group consisting of alumina, boron nitride, aluminum nitride, and fused silica.
Claim 9
Dependent Claim
13 words
The composition according to claim 7, wherein the inorganic filler is fused silica.
Claim 10
Dependent Claim
124 words
The composition according to claim 1, wherein the polydiorganosiloxane has the general formula R 2 R 1 2 SiO(R 1 2 SiO) n SiR 1 2 R 2 wherein each R 1 is independently selected from the group consisting of monovalent hydrocarbon and monovalent halogenated hydrocarbon groups free of aliphatic unsaturation, R 2 is alkenyl, and n has a value such that the viscosity of the polydiorganosiloxane is from 0.5 to 100 Pa.s at 25° C.; the organopolysiloxane resin consists essentially of (CH 3 ) 2 CH 2 ═CHSiO 1/2 units, (CH 3 ) 3 SiO 1/2 units, and SiO 4/2 units; the organohydrogenpolysiloxane comprises a mixture of a trimethylsiloxy-terminated dimethylmethylhydrogensiloxane and (ii) a trimethylsiloxy-terminated polymethylhydrogensiloxane; and the hydrosilylation catalyst is a platinum catalyst.
Claim 11
Dependent Claim
13 words
A silicone elastomer, comprising a reaction product of the composition of claim 1.
Claim 12
Dependent Claim
13 words
A silicone elastomer, comprising a reaction product of the composition of claim 3.
Claim 13
Dependent Claim
13 words
A silicone elastomer, comprising a reaction product of the composition of claim 5.
Claim 14
Dependent Claim
13 words
A silicone elastomer, comprising a reaction product of the composition of claim 7.
Claim 15
Dependent Claim
13 words
A silicone elastomer, comprising a reaction product of the composition of claim 9.
Claim 16
Dependent Claim
224 words
A multi-part silicone composition, comprising: (A) 100 parts by weight of a polydiorganosiloxane containing an average of at least two silicon-bonded alkenyl groups per molecule; (B) 75 to 150 parts by weight of an organopolysiloxane resin having a number-average molecular weight of from 2,000 to 5,000 and consisting essentially of R 3 2 R 4 SiO 1/2 units and SiO 4/2 units wherein each R 3 is independently selected from the group consisting of monovalent hydrocarbon and monovalent halogenated hydrocarbon groups free of aliphatic unsaturation, R 4 is selected from the group consisting of R 3 and alkenyl groups, the mole ratio of R 3 2 R 4 SiO 1/2 units to SiO 4/2 units is from 0.6:1 to 1.1:1, and the resin contains an average of from 2.5 to 7.5 mole percent of alkenyl groups; (C) an organohydrogenpolysiloxane having an average of at least three silicon-bonded hydrogen atoms per molecule in an amount sufficient to provide from one to three silicon-bonded hydrogen atoms per alkenyl group in components (A) and (B) combined; (D) an adhesion promoter in an amount sufficient to effect adhesion of the composition to a substrate; and (E) a hydrosilylation catalyst in an amount sufficient to cure the composition; wherein neither the polydiorganosiloxane nor the organopolysiloxane resin are present with the organohydrogenpolysiloxane and the hydrosilylation catalyst in the same part.
Claim 17
Dependent Claim
224 words
A multi-part silicone composition, comprising: (A) 100 parts by weight of a polydiorganosiloxane containing an average of at least two silicon-bonded alkenyl groups per molecule; (B) 75 to 150 parts by weight of an organopolysiloxane resin having a number-average molecular weight of from 2,000 to 5,000 and consisting essentially of R 3 2 R 4 SiO 1/2 units and SiO 4/2 units wherein each R 3 is independently selected from the group consisting of monovalent hydrocarbon and monovalent halogenated hydrocarbon groups free of aliphatic unsaturation, R 4 is selected from the group consisting of R 3 and alkenyl groups, the mole ratio of R 3 2 R 4 SiO 1/2 units to SiO 4/2 units is from 0.6:1 to 1.1:1, and the resin contains an average of from 2.5 to 7.5 mole percent of alkenyl groups; (C) an organohydrogenpolysiloxane having an average of at least three silicon-bonded hydrogen atoms per molecule in an amount sufficient to provide from one to three silicon-bonded hydrogen atoms per alkenyl group in components (A) and (B) combined; (D) an adhesion promoter in an amount sufficient to effect adhesion of the composition to a substrate; and (E) a hydrosilylation catalyst in an amount sufficient to cure the composition; wherein neither the polydiorganosiloxane nor the organopolysiloxane resin are present with the organohydrogenpolysiloxane and the hydrosilylation catalyst in the same part.
Claim 18
Dependent Claim
44 words
The composition according to claim 15, wherein the adhesion promoter comprises a mixture of (i) a polysiloxane having an average of at least one silicon-bonded alkenyl group and an average of at least one silicon-bonded hydroxyl group per molecule and (ii) an epoxy-containing alkoxysilane.
Claim 19
Dependent Claim
19 words
The composition according to claim 16, wherein the polysiloxane is a hydroxyl-terminated dimethylmethylvinylsiloxane and the epoxy-containing alkoxysilane is glycidoxypropyltrimethoxysilane.
Claim 20
Dependent Claim
83 words
The composition according to claim 15, wherein the adhesion promoter is an organosilicon compound having the average formula: ##STR8## wherein R 9 is a monovalent hydrocarbon group free of aliphatic unsaturation, R 10 is alkenyl, x has a value of from 0 to 10, y has a value of from 0 to 10, z has a value of from 0 to 10, the sum y+z is at least 1, and P has the formula: ##STR9## wherein R 11 is a divalent organic group.
Claim 21
Dependent Claim
45 words
The composition according to claim 18, wherein R 9 is methyl, R 10 is vinyl, x has an average value of 2, y has an average value of 2, z is 0, and R 11 is --CH 2 OCH 2 CH 2 CH 2 --.
Claim 22
Dependent Claim
124 words
The composition according to claim 15, wherein the polydiorganosiloxane has the general formula R 2 R 1 2 SiO(R 1 2 SiO) n SiR 1 2 R 2 wherein each R 1 is independently selected from the group consisting of monovalent hydrocarbon and monovalent halogenated hydrocarbon groups free of aliphatic unsaturation, R 2 is alkenyl, and n has a value such that the viscosity of the polydiorganosiloxane is from 0.5 to 100 Pa.s at 25° C.; the organopolysiloxane resin consists essentially of (CH 3 ) 2 CH 2 ═CHSiO 1/2 units, (CH 3 ) 3 SiO 1/2 units, and SiO 4/2 units; the organohydrogenpolysiloxane comprises a mixture of a trimethylsiloxy-terminated dimethylmethylhydrogensiloxane and (ii) a trimethylsiloxy-terminated polymethylhydrogensiloxane; and the hydrosilylation catalyst is a platinum catalyst.
Claim 23
Dependent Claim
25 words
The composition according to claim 15, further comprising an inorganic filler selected from the group consisting of alumina, boron nitride, aluminum nitride, and fused silica.
Claim 24
Dependent Claim
209 words
A composition prepared by a process comprising the step of mixing: (A) 100 parts by weight of a polydiorganosiloxane containing an average of at least two silicon-bonded alkenyl groups per molecule; (B) 75 to 150 parts by weight of an organopolysiloxane resin having a number-average molecular weight of from 2,000 to 5,000 and consisting essentially of R 3 2 R 4 SiO 1/2 units and SiO 4/2 units wherein each R 3 is independently selected from the group consisting of monovalent hydrocarbon and monovalent halogenated hydrocarbon groups free of aliphatic unsaturation, R 4 is selected from the group consisting of R 3 and alkenyl groups, the mole ratio of R 3 2 R 4 SiO 1/2 units to SiO 4/2 units is from 0.6:1 to 1.1:1, and the resin contains an average of from 2.5 to 7.5 mole percent of alkenyl groups; (C) an organohydrogenpolysiloxane having an average of at least three silicon-bonded hydrogen atoms per molecule in an amount sufficient to provide from one to three silicon-bonded hydrogen atoms per alkenyl group in components (A) and (B) combined; (D) an adhesion promoter in an amount sufficient to effect adhesion of the composition to a substrate; and (E) a hydrosilylation catalyst in an amount sufficient to cure the composition.
Claim 25
Dependent Claim
209 words
A composition prepared by a process comprising the step of mixing: (A) 100 parts by weight of a polydiorganosiloxane containing an average of at least two silicon-bonded alkenyl groups per molecule; (B) 75 to 150 parts by weight of an organopolysiloxane resin having a number-average molecular weight of from 2,000 to 5,000 and consisting essentially of R 3 2 R 4 SiO 1/2 units and SiO 4/2 units wherein each R 3 is independently selected from the group consisting of monovalent hydrocarbon and monovalent halogenated hydrocarbon groups free of aliphatic unsaturation, R 4 is selected from the group consisting of R 3 and alkenyl groups, the mole ratio of R 3 2 R 4 SiO 1/2 units to SiO 4/2 units is from 0.6:1 to 1.1:1, and the resin contains an average of from 2.5 to 7.5 mole percent of alkenyl groups; (C) an organohydrogenpolysiloxane having an average of at least three silicon-bonded hydrogen atoms per molecule in an amount sufficient to provide from one to three silicon-bonded hydrogen atoms per alkenyl group in components (A) and (B) combined; (D) an adhesion promoter in an amount sufficient to effect adhesion of the composition to a substrate; and (E) a hydrosilylation catalyst in an amount sufficient to cure the composition.
Claim 26
Dependent Claim
44 words
The composition according to claim 22, wherein the adhesion promoter comprises a mixture of (i) a polysiloxane having an average of at least one silicon-bonded alkenyl group and an average of at least one silicon-bonded hydroxyl group per molecule and (ii) an epoxy-containing alkoxysilane.
Claim 27
Dependent Claim
19 words
The composition according to claim 23, wherein the polysiloxane is a hydroxyl-terminated dimethylmethylvinylsiloxane and the epoxy-containing alkoxysilane is glycidoxypropyltrimethoxysilane.
Claim 28
Dependent Claim
83 words
The composition according to claim 22, wherein the adhesion promoter is an organosilicon compound having the average formula: ##STR10## wherein R 9 is a monovalent hydrocarbon group free of aliphatic unsaturation, R 10 is alkenyl, x has a value of from 0 to 10, y has a value of from 0 to 10, z has a value of from 0 to 10, the sum y+z is at least 1, and P has the formula: ##STR11## wherein R 11 is a divalent organic group.
Claim 29
Dependent Claim
45 words
The composition according to claim 25, wherein R 9 is methyl, R 10 is vinyl, x has an average value of 2, y has an average value of 2, z is 0, and R 11 is --CH 2 OCH 2 CH 2 CH 2 --.
Claim 30
Dependent Claim
125 words
The composition according to claim 22, wherein wherein the polydiorganosiloxane has the general formula R 2 R 1 2 SiO(R 1 2 SiO) n SiR 1 2 R 2 wherein each R 1 is independently selected from the group consisting of monovalent hydrocarbon and monovalent halogenated hydrocarbon groups free of aliphatic unsaturation, R 2 is alkenyl, and n has a value such that the viscosity of the polydiorganosiloxane is from 0.5 to 100 Pa.s at 25° C.; the organopolysiloxane resin consists essentially of (CH 3 ) 2 CH 2 ═CHSiO 1/2 units, (CH 3 ) 3 SiO 1/2 units, and SiO 4/2 units; the organohydrogenpolysiloxane comprises a mixture of a trimethylsiloxy-terminated dimethylmethylhydrogensiloxane and (ii) a trimethylsiloxy-terminated polymethylhydrogensiloxane; and the hydrosilylation catalyst is a platinum catalyst.
Claim 31
Dependent Claim
25 words
The composition according to claim 22, further comprising an inorganic filler selected from the group consisting of alumina, boron nitride, aluminum nitride, and fused silica.
Claim 32
Independent Claim
210 words
A method of preparing a silicone composition, comprising the step of mixing: (A) 100 parts by weight of a polydiorganosiloxane containing an average of at least two silicon-bonded alkenyl groups per molecule; (B) 75 to 150 parts by weight of an organopolysiloxane resin having a number-average molecular weight of from 2,000 to 5,000 and consisting essentially of R 3 2 R 4 SiO 1/2 units and SiO 4/2 units wherein each R 3 is independently selected from the group consisting of monovalent hydrocarbon and monovalent halogenated hydrocarbon groups free of aliphatic unsaturation, R 4 is selected from the group consisting of R 3 and alkenyl groups, the mole ratio of R 3 2 R 4 SiO 1/2 units to SiO 4/2 units is from 0.6:1 to 1.1:1, and the resin contains an average of from 2.5 to 7.5 mole percent of alkenyl groups; (C) an organohydrogenpolysiloxane having an average of at least three silicon-bonded hydrogen atoms per molecule in an amount sufficient to provide from one to three silicon-bonded hydrogen atoms per alkenyl group in components (A) and (B) combined; (D) an adhesion promoter in an amount sufficient to effect adhesion of the composition to a substrate; and (E) a hydrosilylation catalyst in an amount sufficient to cure the composition.
Claim 33
Independent Claim
210 words
A method of preparing a silicone composition, comprising the step of mixing: (A) 100 parts by weight of a polydiorganosiloxane containing an average of at least two silicon-bonded alkenyl groups per molecule; (B) 75 to 150 parts by weight of an organopolysiloxane resin having a number-average molecular weight of from 2,000 to 5,000 and consisting essentially of R 3 2 R 4 SiO 1/2 units and SiO 4/2 units wherein each R 3 is independently selected from the group consisting of monovalent hydrocarbon and monovalent halogenated hydrocarbon groups free of aliphatic unsaturation, R 4 is selected from the group consisting of R 3 and alkenyl groups, the mole ratio of R 3 2 R 4 SiO 1/2 units to SiO 4/2 units is from 0.6:1 to 1.1:1, and the resin contains an average of from 2.5 to 7.5 mole percent of alkenyl groups; (C) an organohydrogenpolysiloxane having an average of at least three silicon-bonded hydrogen atoms per molecule in an amount sufficient to provide from one to three silicon-bonded hydrogen atoms per alkenyl group in components (A) and (B) combined; (D) an adhesion promoter in an amount sufficient to effect adhesion of the composition to a substrate; and (E) a hydrosilylation catalyst in an amount sufficient to cure the composition.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-09-26 | 2004-03-27 | 2004-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-09-26 | 2008-03-27 | 2008-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-09-26 | 2012-03-27 | 2012-09-26 | $7700.00 | Window Closed / Lapsed |