US5977226A — Vacuum dispensable silicone compositions

Claim 1

Independent Claim 249 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) 10 to 100 parts by weight of an organopolysiloxane resin consisting essentially of (a) R 3 2 (CH 2 ═CH)SiO 1/2 siloxane units, (b) R 3 3 SiO 1/2 siloxane units, and (c) SiO 4/2 siloxane units wherein each R 3 is independently selected from the group consisting of monovalent hydrocarbon and monovalent halogenated hydrocarbon groups free of aliphatic unsaturation, the mole ratio of the combination of (a) and (b) units to (c) units is from 0.6:1 to 1.1:1, and the resin contains from 1 to 5 percent by weight of vinyl 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; (E) a hydrosilylation catalyst in an amount sufficient to provide from 0.1 to 1000 parts per million of a platinum group metal based on the combined weight of components (A), (B) and (C); and (F) a platinum catalyst inhibitor having a boiling point greater than 150° C. at 0.10 MPa in an amount sufficient to retard curing of the composition at ambient temperature; and wherein the composition comprising components (A) through (F) is substantially free of air.

Claim 2

Dependent Claim 249 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) 10 to 100 parts by weight of an organopolysiloxane resin consisting essentially of (a) R 3 2 (CH 2 ═CH)SiO 1/2 siloxane units, (b) R 3 3 SiO 1/2 siloxane units, and (c) SiO 4/2 siloxane units wherein each R 3 is independently selected from the group consisting of monovalent hydrocarbon and monovalent halogenated hydrocarbon groups free of aliphatic unsaturation, the mole ratio of the combination of (a) and (b) units to (c) units is from 0.6:1 to 1.1:1, and the resin contains from 1 to 5 percent by weight of vinyl 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; (E) a hydrosilylation catalyst in an amount sufficient to provide from 0.1 to 1000 parts per million of a platinum group metal based on the combined weight of components (A), (B) and (C); and (F) a platinum catalyst inhibitor having a boiling point greater than 150° C. at 0.10 MPa in an amount sufficient to retard curing of the composition at ambient temperature; and wherein the composition comprising components (A) through (F) is substantially free of air.

Claim 3

Dependent Claim 21 words

The composition according to claim 1, wherein the polydiorganosiloxane has a viscosity of from 1 to 100 Pa·s at 25° C.

Claim 4

Dependent Claim 41 words

The composition according to claim 1, wherein component (A) comprises 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 5

Dependent Claim 14 words

The composition according to claim 1, wherein component (A) is free of aryl groups.

Claim 6

Dependent Claim 83 words

The composition according to claim 1, wherein the adhesion promoter is an organosilicon compound having the average formula: ##STR7## wherein R 5 is a monovalent hydrocarbon group free of aliphatic unsaturation, R 6 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 Q has the formula: ##STR8## wherein R 7 is a divalent organic group.

Claim 7

Dependent Claim 37 words

The composition according to claim 5, wherein R 5 is methyl, R 6 is vinyl, x is 2, y is 2, z is 0, and R 7 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 15 words

The composition according to claim 1, wherein the platinum catalyst inhibitor is an acetylenic alcohol.

Claim 11

Dependent Claim 12 words

The composition according to claim 9, wherein the acetylenic alcohol is 2-phenyl-3-butyn-2-ol.

Claim 12

Dependent Claim 134 words

The composition according to claim 5, wherein component (A) is a polydiorganosiloxane having 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 component (A) is from 1 to 100 Pa·s at 25° C.; (B) is an organopolysiloxane resin consisting essentially of (CH 3 ) 2 CH 2 ═CHSiO 1/2 siloxane units, (CH 3 ) 3 SiO 1/2 siloxane units, and SiO 4/2 siloxane units; (C) is a trimethylsiloxy-terminated dimethylmethylhydrogensiloxane having an average degree of polymerization of 10; (E) is a platinum catalyst; and (F) is an acetylenic alcohol.

Claim 13

Dependent Claim 25 words

The composition according to claim 11, further comprising an inorganic filler selected from the group consisting of alumina, boron nitride, aluminum nitride, and fused silica.

Claim 14

Dependent Claim 15 words

The composition according to claim 1, wherein the composition is contained in a sealed package.

Claim 15

Dependent Claim 13 words

A cured composition, comprising a reaction product of the composition of claim 1.

Claim 16

Dependent Claim 13 words

A cured composition, comprising a reaction product of the composition of claim 2.

Claim 17

Dependent Claim 13 words

A cured composition, comprising a reaction product of the composition of claim 3.

Claim 18

Dependent Claim 13 words

A cured composition, comprising a reaction product of the composition of claim 5.

Claim 19

Dependent Claim 13 words

A cured composition, comprising a reaction product of the composition of claim 7.

Claim 20

Dependent Claim 13 words

A cured composition, comprising a reaction product of the composition of claim 9.

Claim 21

Dependent Claim 272 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) 10 to 100 parts by weight of an organopolysiloxane resin consisting essentially of (a) R 3 2 (CH 2 ═CH)SiO 1/2 siloxane units, (b) R 3 3 SiO 1/2 siloxane units, and (c) SiO 4/2 siloxane units wherein each R 3 is independently selected from the group consisting of monovalent hydrocarbon and monovalent halogenated hydrocarbon groups free of aliphatic unsaturation, the mole ratio of the combination of (a) and (b) units to (c) units is from 0.6:1 to 1.1:1, and the resin contains from 1 to 5 percent by weight of vinyl 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; (E) a hydrosilylation catalyst in an amount sufficient to provide from 0.1 to 1000 parts per million of a platinum group metal based on the combined weight of components (A), (B) and (C); and (F) a platinum catalyst inhibitor having a boiling point greater than 150° C. at 0.10 MPa in an amount sufficient to retard curing of the composition at ambient temperature; wherein each part of the composition is substantially free of air, and with the proviso that neither the polydiorganosiloxane nor the organopolysiloxane resin are present with the organohydrogenpolysiloxane and the hydrosilylation catalyst in the same part.

Claim 22

Dependent Claim 272 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) 10 to 100 parts by weight of an organopolysiloxane resin consisting essentially of (a) R 3 2 (CH 2 ═CH)SiO 1/2 siloxane units, (b) R 3 3 SiO 1/2 siloxane units, and (c) SiO 4/2 siloxane units wherein each R 3 is independently selected from the group consisting of monovalent hydrocarbon and monovalent halogenated hydrocarbon groups free of aliphatic unsaturation, the mole ratio of the combination of (a) and (b) units to (c) units is from 0.6:1 to 1.1:1, and the resin contains from 1 to 5 percent by weight of vinyl 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; (E) a hydrosilylation catalyst in an amount sufficient to provide from 0.1 to 1000 parts per million of a platinum group metal based on the combined weight of components (A), (B) and (C); and (F) a platinum catalyst inhibitor having a boiling point greater than 150° C. at 0.10 MPa in an amount sufficient to retard curing of the composition at ambient temperature; wherein each part of the composition is substantially free of air, and with the proviso that neither the polydiorganosiloxane nor the organopolysiloxane resin are present with the organohydrogenpolysiloxane and the hydrosilylation catalyst in the same part.

Claim 23

Dependent Claim 208 words

The composition according to claim 20, wherein component (A) is a polydiorganosiloxane having 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 component (A) is from 1 to 100 Pa·s at 25° C.; (B) is an organopolysiloxane resin consisting essentially of (CH 3 ) 2 CH 2 ═CHSiO 1/2 siloxane units, (CH 3 ) 3 SiO 1/2 siloxane units, and SiO 4/2 siloxane units; (C) is a trimethylsiloxy-terminated dimethylmethylhydrogensiloxane having an average degree of polymerization of 10; (D) is an organosilicon compound having the average formula: ##STR9## wherein R 5 is a monovalent hydrocarbon group free of aliphatic unsaturation, R 6 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 Q has the formula ##STR10## wherein R 7 is a divalent organic group; (E) is a platinum catalyst; and (F) is an acetylenic alcohol.

Claim 24

Dependent Claim 25 words

The composition according to claim 20, further comprising an inorganic filler selected from the group consisting of alumina, boron nitride, aluminum nitride, and fused silica.

Claim 25

Independent Claim 257 words

A method of preparing a silicone composition, comprising the steps of: (I) mixing (A) 100 parts by weight of a polydiorganosiloxane containing an average of at least two silicon-bonded alkenyl groups per molecule; (B) 10 to 100 parts by weight of an organopolysiloxane resin consisting essentially of (a) R 3 2 (CH 2 ═CH)SiO 1/2 siloxane units, (b) R 3 3 SiO 1/2 siloxane units, and (c) SiO 4/2 siloxane units wherein each R 3 is independently selected from the group consisting of monovalent hydrocarbon and monovalent halogenated hydrocarbon groups free of aliphatic unsaturation, the mole ratio of the combination of (a) and (b) units to (c) units is from 0.6:1 to 1.1:1, and the resin contains from 1 to 5 percent by weight of vinyl 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; (E) a hydrosilylation catalyst in an amount sufficient to provide from 0.1 to 1000 parts per million of a platinum group metal based on the combined weight of components (A), (B) and (C); and (F) a platinum catalyst inhibitor having a boiling point greater than 150° C. at 0.10 MPa in an amount sufficient to retard curing of the composition at ambient temperature; and (II) de-airing the mixture to produce a composition substantially free of air.

Claim 26

Independent Claim 257 words

A method of preparing a silicone composition, comprising the steps of: (I) mixing (A) 100 parts by weight of a polydiorganosiloxane containing an average of at least two silicon-bonded alkenyl groups per molecule; (B) 10 to 100 parts by weight of an organopolysiloxane resin consisting essentially of (a) R 3 2 (CH 2 ═CH)SiO 1/2 siloxane units, (b) R 3 3 SiO 1/2 siloxane units, and (c) SiO 4/2 siloxane units wherein each R 3 is independently selected from the group consisting of monovalent hydrocarbon and monovalent halogenated hydrocarbon groups free of aliphatic unsaturation, the mole ratio of the combination of (a) and (b) units to (c) units is from 0.6:1 to 1.1:1, and the resin contains from 1 to 5 percent by weight of vinyl 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; (E) a hydrosilylation catalyst in an amount sufficient to provide from 0.1 to 1000 parts per million of a platinum group metal based on the combined weight of components (A), (B) and (C); and (F) a platinum catalyst inhibitor having a boiling point greater than 150° C. at 0.10 MPa in an amount sufficient to retard curing of the composition at ambient temperature; and (II) de-airing the mixture to produce a composition substantially free of air.

Claim 27

Dependent Claim 208 words

The method according to claim 23, wherein component (A) is a polydiorganosiloxane having 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 component (A) is from 1 to 100 Pa·s at 25° C.; (B) is an organopolysiloxane resin consisting essentially of (CH 3 ) 2 CH 2 ═CHSiO 1/2 siloxane units, (CH 3 ) 3 SiO 1/2 siloxane units, and SiO 4/2 siloxane units; (C) is a trimethylsiloxy-terminated dimethylmethylhydrogensiloxane having an average degree of polymerization of 10; (D) is an organosilicon compound having the average formula: ##STR11## wherein R 5 is a monovalent hydrocarbon group free of aliphatic unsaturation, R 6 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 Q has the formula ##STR12## wherein R 7 is a divalent organic group; (E) is a platinum catalyst; and (F) is an acetylenic alcohol.

Claim 28

Dependent Claim 32 words

The method according to claim 23, wherein the mixture formed prior to de-airing further comprises an inorganic filler selected from the group consisting of alumina, boron nitride, aluminum nitride, and fused silica.

Claim 29

Dependent Claim 23 words

The method according to claim 23, wherein the step of de-airing comprises passing the mixture through a falling film evaporator under a vacuum.

Claim 30

Dependent Claim 32 words

The method according to claim 26, wherein the step of de-airing is carried out at a pressure of less than 1333 Pa and at a temperature of from 20 to 30° C.

Claim 31

Dependent Claim 23 words

The method according to claim 23, wherein the step of de-airing the mixture comprises de-airing components (A) through (F) individually prior to mixing.

Claim 32

Dependent Claim 25 words

The method according to claim 23, wherein the step of de-airing the mixture comprises de-airing partial mixtures of components (A) through (F) prior to mixing.

Claim 33

Dependent Claim 10 words

A composition prepared according to the method of claim 23.

Claim 34

Dependent Claim 10 words

A composition prepared according to the method of claim 24.

Claim 35

Dependent Claim 10 words

A composition prepared according to the method of claim 25.

Claim 36

Dependent Claim 10 words

A composition prepared according to the method of claim 26.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2002-11-01	2003-05-03	2003-11-02	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2006-11-01	2007-05-03	2007-11-02	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2010-11-01	2011-05-03	2011-11-02	$7700.00	Window Closed / Lapsed

Vacuum dispensable silicone compositions

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