Primer compositions
First Claim
1. A primer composition comprising(I) 100 parts by weight of an organoalkoxysilane or siloxane of the following average compositional formula (1):
-
space="preserve" listing-type="equation">R.sup.1.sub.a R.sup.2.sub.b (OR.sup.3).sub.c SiO.sub.(4-a-b-c)/2 (1)wherein R1 is a substituted or unsubstituted monovalent hydrocarbon group, R2 is a monovalent organic group having a functional group, R3 is an unsubstituted or alkoxy-substituted alkyl group, letters a, b and c are numbers satisfying 0≦
a≦
3, 0≦
b≦
3, 0<
c≦
4, and 0<
a+b+c≦
4,(II) 1 to 500 parts by weight of an alkoxysilyl-containing organohydrogensiloxane of the following average compositional formula (2);
space="preserve" listing-type="equation">H.sub.d R.sup.4.sub.e (XSiR.sup.5.sub.g (OR.sup.6).sub.h).sub.f SiO.sub.(4-d-e-f)/2 (2)wherein R4 and R1 each are a substituted or unsubstituted monovalent hydrocarbon group, R6 is an unsubstituted or alkoxy-substituted alkyl group, X is a substituted or unsubstituted divalent organic group or oxygen atom, letters d, e and f are numbers satisfying 0<
d≦
2, 0≦
e≦
3, 0<
f≦
3, and 0<
d+e+f≦
4, letter g is equal to 0, 1 or 2, letter h is equal to 1, 2 or 3, and g+h=3, and(III) 0.1 to 500 parts by weight of an organic titanate.
1 Assignment
0 Petitions
Accused Products
Abstract
The invention provides a primer composition comprising (I) an organoalkoxysilane or siloxane, (II) an organohydrogensiloxane having an SiH group and an alkoxysilyl group, and (III) an organic titanate. Also provided is a primer composition comprising (A) an alkenyl-containing organopolysiloxane, (B) an organopolysiloxane, (C) an organoalkoxysilane or siloxane, (D) an organohydrogensiloxane having an SiH group and an alkoxysilyl group, (E) a platinum catalyst, (F) an organic titanate, and (G) an organic peroxide. The primer compositions have sufficient adhesion to join thermoset silicone rubber to various substrates.
57 Citations
20 Claims
-
1. A primer composition comprising
(I) 100 parts by weight of an organoalkoxysilane or siloxane of the following average compositional formula (1): -
space="preserve" listing-type="equation">R.sup.1.sub.a R.sup.2.sub.b (OR.sup.3).sub.c SiO.sub.(4-a-b-c)/2 (1)wherein R1 is a substituted or unsubstituted monovalent hydrocarbon group, R2 is a monovalent organic group having a functional group, R3 is an unsubstituted or alkoxy-substituted alkyl group, letters a, b and c are numbers satisfying 0≦
a≦
3, 0≦
b≦
3, 0<
c≦
4, and 0<
a+b+c≦
4,(II) 1 to 500 parts by weight of an alkoxysilyl-containing organohydrogensiloxane of the following average compositional formula (2);
space="preserve" listing-type="equation">H.sub.d R.sup.4.sub.e (XSiR.sup.5.sub.g (OR.sup.6).sub.h).sub.f SiO.sub.(4-d-e-f)/2 (2)wherein R4 and R1 each are a substituted or unsubstituted monovalent hydrocarbon group, R6 is an unsubstituted or alkoxy-substituted alkyl group, X is a substituted or unsubstituted divalent organic group or oxygen atom, letters d, e and f are numbers satisfying 0<
d≦
2, 0≦
e≦
3, 0<
f≦
3, and 0<
d+e+f≦
4, letter g is equal to 0, 1 or 2, letter h is equal to 1, 2 or 3, and g+h=3, and(III) 0.1 to 500 parts by weight of an organic titanate. - View Dependent Claims (2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20)
-
-
3. A primer composition comprising
(A) 100 parts by weight of an alkenyl-containing organopolysiloxane of the following average compositional formula (5) having a viscosity of at least 5,000 centistokes at 25° - C.;
space="preserve" listing-type="equation">R.sup.13.sub.i SiO.sub.(4-i)/2 (5)wherein R13 is a substituted or unsubstituted monovalent hydrocarbon group, at least 0.15 mol % of R13 is alkenyl, letter i is a positive number satisfying 1.9≦
i≦
2.3,(B) 5 to 200 parts by weight of an organopolysiloxane of the following average compositional formula (6);
space="preserve" listing-type="equation">R.sup.14.sub.j SiO.sub.(4-j)/2 (6)wherein R14 is a substituted or unsubstituted monovalent hydrocarbon group and letter j is a positive number satisfying 0.5≦
j≦
1.8,(C) 5 to 500 parts by weight of an organoalkoxysilane or siloxane of the following average compositional formula (1);
space="preserve" listing-type="equation">R.sup.1.sub.a R.sup.2.sub.b (OR.sup.3).sub.c SiO.sub.(4-a-b-c)/2 (1)wherein R1 is a substituted or unsubstituted monovalent hydrocarbon group, R2 is a monovalent organic group having a functional group, R3 is an unsubstituted or alkoxy-substituted alkyl group, letters a, b and c are numbers satisfying 0≦
a≦
3, 0≦
b ≦
3, 0<
c≦
4, and 0<
a+b+c≦
4,(D) 1 to 500 parts by weight of an organohydrogen- siloxane of the following general formula (3) having an SiH group at a molecular chain end and an alkoxysilyl group in a molecule;
##STR18## wherein R7 , R , R9, R10, and R11 each are a substituted or unsubstituted monovalent hydrocarbon group, Y is a substituted or unsubstituted divalent organic group, R12 is an unsubstituted or alkoxy-substituted alkyl group, letters k and m are integers satisfying 0<
k≦
20 and 0≦
m≦
20, letter E is equal to 0, 1 or 2, letter q is equal to 1, 2 or 3, and p+q=3,(E) 1 to 100 ppm calculated as platinum metal of a platinum series catalyst, (F) 0.1 to 100 parts by weight of an organic titanate, and (G) 0.1 to 5 parts by weight of an organic peroxide. - View Dependent Claims (19)
- C.;
Specification