US5312690A — Self-adhesive silicone rubber composition and sil…

Claim 1

Independent Claim 211 words

A silicone rubber-coated fabric web which comprises: (A) a fabric web; and (B) a layer of a silicone rubber cured and bonded to at least one surface of the fabric web, said rubber being a cured self-adhesive silicone rubber composition which is a uniform blend comprising: (a) 100 parts by weight of an organopolysiloxane represented by the average unit formula R.sub.a SiO.sub.(4-a)/2' in which R is an unsubstituted or substituted monovalent hydrocarbon group and the subscript a is a positive number in the range from 1.98 to 2.01, and having a viscosity of at least 300 centistokes at 25° C.; (b) from 0.1 to 20 parts by weight of an organosilane compound having, in a molecule, an isocyanato group --NCO and a hydrolyzable group represented by the formula R.sup.1.sub.b Si(OR.sup.1).sub.3-b (R.sup.2 --NCO), in which the group denoted by R 1 is a monovalent hydrocarbon group or an alkoxy-substituted alkyl group, the group denoted by R 2 is a divalent hydrocarbon group having 1 to 10 carbon atoms or an alkylene group having a sulfur atom between the carbon atoms forming a sulfide linkage and the subscript b is zero, 1 or 2, or a partial hydrolysis product thereof; and (c) a curing agent in an amount sufficient to cure the composition.

Claim 2

Dependent Claim 211 words

A silicone rubber-coated fabric web which comprises: (A) a fabric web; and (B) a layer of a silicone rubber cured and bonded to at least one surface of the fabric web, said rubber being a cured self-adhesive silicone rubber composition which is a uniform blend comprising: (a) 100 parts by weight of an organopolysiloxane represented by the average unit formula R.sub.a SiO.sub.(4-a)/2' in which R is an unsubstituted or substituted monovalent hydrocarbon group and the subscript a is a positive number in the range from 1.98 to 2.01, and having a viscosity of at least 300 centistokes at 25° C.; (b) from 0.1 to 20 parts by weight of an organosilane compound having, in a molecule, an isocyanato group --NCO and a hydrolyzable group represented by the formula R.sup.1.sub.b Si(OR.sup.1).sub.3-b (R.sup.2 --NCO), in which the group denoted by R 1 is a monovalent hydrocarbon group or an alkoxy-substituted alkyl group, the group denoted by R 2 is a divalent hydrocarbon group having 1 to 10 carbon atoms or an alkylene group having a sulfur atom between the carbon atoms forming a sulfide linkage and the subscript b is zero, 1 or 2, or a partial hydrolysis product thereof; and (c) a curing agent in an amount sufficient to cure the composition.

Claim 3

Dependent Claim 27 words

The web as claimed in claim 1 in which at least 50% by moles of the groups denoted by R in the component (a) are methyl groups.

Claim 4

Dependent Claim 31 words

The web as claimed in claim 1 in which the organopolysiloxane as the component (a) has a viscosity in the range from 1×10 4 to 1×10 8 centistokes at 25° C.

Claim 5

Dependent Claim 93 words

The web as claimed in claim 1 in which the organosilane compound as the component (b) is selected from the group consisting of the compounds expressed by the structural formulas (MeO).sub.3 Si(C.sub.3 H.sub.6 --NCO); (EtO).sub.3 Si(C.sub.3 H.sub.6 --NCO); (CH.sub.2 =CMe--O).sub.3 Si(C.sub.3 H.sub.6 --NCO); (MeOC.sub.2 H.sub.4 O).sub.3 Si(C.sub.3 H.sub.6 --NCO); (MeO).sub.2 MeSi(C.sub.3 H.sub.6 --NCO); (MeO).sub.2 ViSi(C.sub.3 H.sub.6 --NCO); (MeO).sub.2 PhSi(C.sub.3 H.sub.6 --NCO); (EtO).sub.2 MeSi(C.sub.3 H.sub.6 --NCO); (MeO).sub.3 Si(C.sub.2 H.sub.4 --S--C.sub.3 H.sub.6 --NCO); and (MeO).sub.2 MeSi(C.sub.2 H.sub.4 --S--C.sub.3 H.sub.6 --NCO), in which Me, Et, Vi and Ph denote methyl, ethyl, vinyl and phenyl groups, respectively.

Claim 6

Dependent Claim 16 words

The web as claimed in claim 1 in which the curing agent is an organic peroxide.

Claim 7

Dependent Claim 35 words

The web as claimed in claim 5 in which the amount of the organic peroxide is in the range from 0.1 to 5 parts by weight per 100 parts by weight of the component (a).

Claim 8

Dependent Claim 43 words

The web as claimed in claim 1 in which the curing agent is a combination of an organohydrogenpolysiloxane and a platinum compound when the organopolysiloxane as the component (a) has at least two alkenyl groups bonded to the silicon atoms in a molecule.

Claim 9

Independent Claim 189 words

A method for preparing a fabric web coated with a silicone rubber, comprising coating a fabric substrate with a composition comprising (a) 100 parts by weight of an organopolysiloxane represented by the average unit formula R.sub.a SiO.sub.(4-a)/2' in which R is an unsubstituted or substituted monovalent hydrocarbon group and the subscript is a positive number in the range from 1.98 to 2.01, and having a viscosity of at least 300 centistokes at 25° C.; (b) from 0.1 to 20 parts by weight of an organosilane compound having, in a molecule, an isocyanato group --NCO and a hydrolyzable group represented by the general formula R.sup.1.sub.b Si(OR.sup.1).sub.3-b (R.sup.2 --NCO), in which the group denoted by R 1 is a monovalent hydrocarbon group or an alkoxy-substituted alkyl group, the group denoted by R 2 is a divalent hydrocarbon group having 1 to 10 carbon atoms or an alkylene group having a sulfur atom between the carbon atoms forming a sulfide linkage and the subscript b is zero, 1 or 2, or a partial hydrolysis product thereof; (c) a curing agent in a amount sufficient to cure the composition; and curing said composition.

Claim 10

Independent Claim 189 words

A method for preparing a fabric web coated with a silicone rubber, comprising coating a fabric substrate with a composition comprising (a) 100 parts by weight of an organopolysiloxane represented by the average unit formula R.sub.a SiO.sub.(4-a)/2' in which R is an unsubstituted or substituted monovalent hydrocarbon group and the subscript is a positive number in the range from 1.98 to 2.01, and having a viscosity of at least 300 centistokes at 25° C.; (b) from 0.1 to 20 parts by weight of an organosilane compound having, in a molecule, an isocyanato group --NCO and a hydrolyzable group represented by the general formula R.sup.1.sub.b Si(OR.sup.1).sub.3-b (R.sup.2 --NCO), in which the group denoted by R 1 is a monovalent hydrocarbon group or an alkoxy-substituted alkyl group, the group denoted by R 2 is a divalent hydrocarbon group having 1 to 10 carbon atoms or an alkylene group having a sulfur atom between the carbon atoms forming a sulfide linkage and the subscript b is zero, 1 or 2, or a partial hydrolysis product thereof; (c) a curing agent in a amount sufficient to cure the composition; and curing said composition.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1997-05-16	1997-11-15	1998-05-17	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2001-05-16	2001-11-15	2002-05-17	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2005-05-16	2005-11-15	2006-05-17	$7700.00	Window Closed / Lapsed

Self-adhesive silicone rubber composition and silicone rubber coated-fabric material

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