US4332844A
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Silicone compositions for adhesion and method for adhering silicone rubber to a substrate
Assignee: DuPont Toray Specialty Materials KK
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Filing: 1981-01-02
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Granted: 1982-06-01
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Expires: 2001-01-02
Abstract
Abstract A silicone composition prepared from an alkoxy-containing silicon compound, an organotitanate, and an organohydrogensilicon compound, optionally an organic solvent is useful for improving the adhesion between silicone rubber and a substrate.
Inventors
- 👤 Mitsuo Hamada
- 👤 Sadami Yasuda
- 👤 Chiichiro Hasegawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:12
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/12; C08J5/124; C08L; C08L83/00; C09; C09D; C09D183/00; C09D183/04; C09J; C09J183/00; C09J183/04; C08J2383/00; C08J2383/04; C08L2666/00; C08L2666/28; C08L2666/52; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
201 words
A silicone composition consisting of (A) 100 parts by weight of an organosilicon compound having an average unit formula ##EQU6## in which R 1 represents a monovalent radical selected from the group consisting of hydrocarbon radicals and halogenated hydrocarbon radicals; R 2 represents a monovalent organic radical containing a functional group selected from the group consisting of epoxy, methacryloxy, amino, and mercapto; R 3 represents an alkyl radical; a has a value of 0 to 3 inclusive; b has a value of 0 to 3 inclusive; c has a value such that 0<c≦4; and the sum of a+b+c has a value such that 0<a+b+c≦4; and said organosilicon compound containing at least one silicon-bonded alkoxy radical per molecule, (B) 5 to 500 parts by weight of an organotitanate, and (C) 5 to 1000 parts by weight of an organohydrogensilicon compound having an average unit formula ##EQU7## in which R 4 represents a monovalent radical selected from the group consisting of hydrocarbon radicals and halogenated hydrocarbon radicals; x has a value such that 0<x≦3; y has a value such that 0<y≦2; and the sum of x+y has a value such that 0<x+y≦4; and said organohydrogensilicon compound contains at least one SiH per molecule.
Claim 2
Dependent Claim
201 words
A silicone composition consisting of (A) 100 parts by weight of an organosilicon compound having an average unit formula ##EQU6## in which R 1 represents a monovalent radical selected from the group consisting of hydrocarbon radicals and halogenated hydrocarbon radicals; R 2 represents a monovalent organic radical containing a functional group selected from the group consisting of epoxy, methacryloxy, amino, and mercapto; R 3 represents an alkyl radical; a has a value of 0 to 3 inclusive; b has a value of 0 to 3 inclusive; c has a value such that 0<c≦4; and the sum of a+b+c has a value such that 0<a+b+c≦4; and said organosilicon compound containing at least one silicon-bonded alkoxy radical per molecule, (B) 5 to 500 parts by weight of an organotitanate, and (C) 5 to 1000 parts by weight of an organohydrogensilicon compound having an average unit formula ##EQU7## in which R 4 represents a monovalent radical selected from the group consisting of hydrocarbon radicals and halogenated hydrocarbon radicals; x has a value such that 0<x≦3; y has a value such that 0<y≦2; and the sum of x+y has a value such that 0<x+y≦4; and said organohydrogensilicon compound contains at least one SiH per molecule.
Claim 3
Dependent Claim
14 words
The silicone composition according to claim 1 in which an organic solvent is present.
Claim 4
Dependent Claim
22 words
The silicone composition according to claim 1 in which the organosilicon compound of (A) is selected from an alkoxysilane and an alkylpolysilicate.
Claim 5
Dependent Claim
22 words
The silicone composition according to claim 2 in which the organosilicon compound of (A) is selected from an alkoxysilane and an alkylpolysilicate.
Claim 6
Dependent Claim
33 words
The silicone composition according to claim 4 in which the organosilicon compound of (A) is a tetraalkoxysilane, the organotitinate of (B) is a tetraalkyltitanate and the organohydrogensilicon compound of (C) is a polymethylhydrogensiloxane.
Claim 7
Dependent Claim
24 words
The silicone composition according to claim 5 in which the tetraalkoxysilane is tetra-n-propoxysilane and the tetraalkyltitanate is tetrabutyltitanate and the organic solvent is n-heptane.
Claim 8
Dependent Claim
33 words
The silicone composition according to claim 4 in which the organosilicon compound of (A) is an alkylpolysilicate, the organotitanate of (B) is a tetraalkyltitanate, and the organohydrogensilicon compound of (C) is a polymethylhydrogensiloxane.
Claim 9
Dependent Claim
23 words
The silicone composition according to claim 7 in which the alkylpolysilicate is ethylpolysilicate, the tetraalkyltitanate is tetrabutyltitanate, and the organic solvent is n-heptane.
Claim 10
Independent Claim
244 words
A method for adhering silicone rubber to a substrate comprising applying a coating of a silicone composition to a substrate surface, said silicone composition consisting of (A) 100 parts by weight of an organosilicon compound having an average unit formula ##EQU8## in which R 1 represents a monovalent radical selected from the group consisting of hydrocarbon radicals and halogenated hydrocarbon radicals; R 2 represents a monovalent organic radical containing a functional group selected from the group consisting of epoxy, methacryloxy, amino, and mercapto; R 3 represents an alkyl radical; a has a value of 0 to 3 inclusive; b has a value of 0 to 3 inclusive; c has a value such that 0<c≦4; and the sum of a+b+c has a value such that 0<a+b+c≦4; and said organosilicon compound containing at least one silicon-bonded alkoxy radical per molecule, (B) 5 to 500 parts by weight of an organotitanate, and (C) 5 to 1000 parts by weight of an organohydrogensilicon compound having an average unit formula ##EQU9## in which R 4 represents a monovalent radical selected from the group consisting of hydrocarbon radicals and halogenated hydrocarbon radicals; x has a value such that 0<x≦3; y has a value such that 0<y≦2; and the sum of x+y has a value such that 0<x+y≦4; and said organohydrogensilicon compound contains at least one SiH per molecule, drying the coating, applying an unvulcanized silicone rubber containing a curing catalyst over the dried coating, and thereafter curing the silicone rubber.
Claim 11
Independent Claim
244 words
A method for adhering silicone rubber to a substrate comprising applying a coating of a silicone composition to a substrate surface, said silicone composition consisting of (A) 100 parts by weight of an organosilicon compound having an average unit formula ##EQU8## in which R 1 represents a monovalent radical selected from the group consisting of hydrocarbon radicals and halogenated hydrocarbon radicals; R 2 represents a monovalent organic radical containing a functional group selected from the group consisting of epoxy, methacryloxy, amino, and mercapto; R 3 represents an alkyl radical; a has a value of 0 to 3 inclusive; b has a value of 0 to 3 inclusive; c has a value such that 0<c≦4; and the sum of a+b+c has a value such that 0<a+b+c≦4; and said organosilicon compound containing at least one silicon-bonded alkoxy radical per molecule, (B) 5 to 500 parts by weight of an organotitanate, and (C) 5 to 1000 parts by weight of an organohydrogensilicon compound having an average unit formula ##EQU9## in which R 4 represents a monovalent radical selected from the group consisting of hydrocarbon radicals and halogenated hydrocarbon radicals; x has a value such that 0<x≦3; y has a value such that 0<y≦2; and the sum of x+y has a value such that 0<x+y≦4; and said organohydrogensilicon compound contains at least one SiH per molecule, drying the coating, applying an unvulcanized silicone rubber containing a curing catalyst over the dried coating, and thereafter curing the silicone rubber.
Claim 12
Dependent Claim
16 words
The method in accordance with claim 9 in which the silicone composition contains an organic solvent.
Claim 13
Dependent Claim
41 words
The silicone composition according to claim 2 in which the organosilicon compound of (A) is a mixture of n-propylorthosilicate, 3,3,3-trifluoropropyltrimethoxysilane, and vinyltrimethoxysilane, the organotitanate of (B) is tetrabutyltitanate, the organohydrogensilicon compound of (C) is ##STR14## and the organic solvent is n-heptane.
Claim 14
Dependent Claim
35 words
The silicone composition according to claim 2 in which the organosilicon compound of (A) is ##STR15## the organotitanate of (B) is tetrabutyltitanate, the organohydrogensilicon compound of (C) is ##STR16## and the organic solvent is toluene.
Claim 15
Dependent Claim
39 words
The silicone composition according to claim 2 in which the organosilicon compound of (A) is H.sub.2 NCH.sub.2 CH.sub.2 NH(CH.sub.2).sub.3 Si(OCH.sub.3).sub.3, the organotitanate of (B) is tetrabutyltitanate, the organohydrogensilicon compound of (C) is ##STR17## and the organic solvent is toluene.
Claim 16
Dependent Claim
35 words
The silicone composition according to claim 2 in which the organosilicon compound of (A) is ##STR18## the organotitanate of (B) is tetrabutyltitanate, the organohydrogensilicon compound of (C) is ##STR19## and the organic solvent is toluene.
Claim 17
Dependent Claim
36 words
The silicone composition according to claim 2 in which the organosilicon compound of (A) is HS(CH.sub.2).sub.3 Si(OCH.sub.3).sub.3, the organotitanate of (B) is tetrabutyltitanate, the organohydrogensilicon compound of (C) is ##STR20## and the organic solvent is toluene.
Claim 18
Dependent Claim
39 words
The silicone composition according to claim 2 in which the organosilicon compound of (A) is ##STR21## the organotitanate of (B) is [C.sub.4 H.sub.9 NH(CH.sub.2).sub.4 O].sub.4 Ti, the organohydrogensilicon compound of (C) is ##STR22## and the organic solvent is toluene.
Claim 19
Dependent Claim
39 words
The silicone composition according to claim 2 in which the organosilicon compound of (A) is ##STR23## the organotitanate of (B) is [C.sub.4 H.sub.9 NH(CH.sub.2).sub.4 O].sub.4 Ti, the organohydrogensilicon compound of (C) is ##STR24## and the organic solvent is toluene.
Claim 20
Dependent Claim
100 words
The silicone composition according to claim 2 in which the organosilicon compound of (A) is liquid organopolysiloxane resin containing 10% alkoxy groups, having a viscosity of 2 Pa·s, and prepared by the hydrolysis of a mixture consisting of 60 mol % CH 3 Si(OCH 3 ) 3 , 30 mol % (CH 3 )(CH 2 ═CH)Si(OC 2 H 5 ) 2 , and 10 mol % (C 6 H 5 ) 2 Si(OCH 3 ) 2 , the organotitanate of (B) is [C.sub.4 H.sub.9 NH(CH.sub.2).sub.4 O].sub.4 Ti, the organohydrogensilicon compound of (C) is ##STR25## and the organic solvent is toluene.
Claim 21
Dependent Claim
18 words
The method in accordance with claim 10 in which the substrate is an organic peroxide vulcanized silicone rubber.
Claim 22
Dependent Claim
13 words
The method in accordance with claim 10 in which the substrate is aluminum.
Claim 23
Dependent Claim
14 words
The method in accordance with claim 10 in which the substrate is stainless steel.
Claim 24
Dependent Claim
15 words
The method in accordance with claim 10 in which the substrate is unvulcanized fluorosilicone rubber.
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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) | 1985-05-31 | 1985-11-30 | 1986-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-31 | 1989-11-30 | 1990-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-31 | 1993-11-30 | 1994-06-01 | $7700.00 | Window Closed / Lapsed |