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US 6,274,658 B1Granted
Addition-curable silicone rubber composition
AssigneeShin-Etsu Chemical Co., Ltd.
InventorHiroyasu Hara
Life of this patent
Estimating the term…
Abstract
An addition-curable silicone rubber composition comprising (A) an organopolysiloxane containing in one molecule at least two alkenyl groups bonded to silicon atoms, (B) an organohydrogenpolysiloxane containing in one molecule at least two hydrogen atoms bonded to silicon atoms, (C) a platinum catalyst and (D) a (meth)acrylate compound having a melting point of 40° C. or above. This composition has both a good storage stability and a rapid-curing performance in a well balanced state, and hence has a high workability and contributes to an improvement in productivity.
Claims11
An addition-curable silicone rubber composition comprising:
- (A) an organopolysiloxane containing in one molecule at least two alkenyl groups bonded to silicon atoms, represented by the average compositional formula (1):
- R1aR2bSiO(4−a−b)/2
- wherein R1 represents a substituted or unsubstituted monovalent hydrocarbon group containing no aliphatic unsaturated bond;
- R2 represents an alkenyl group;
- and a is a number ranging from 0.96 to 2.00, b is a number ranging from 0.0001 to 0.5, and a and b satisfy a+b=1.90 to 2.04;
- (B) an organohydrogenpolysiloxane containing in one molecule at least two hydrogen atoms bonded to silicon atoms, represented by the average compositional formula (2):
- R3cHdSiO(4−c−d)/2
- wherein R3 represents a substituted or unsubstituted monovalent hydrocarbon group containing no aliphatic unsaturated bond;
- and c is a number ranging from 0.70 to 2.0, d is a number ranging from 0.005 to 1.0, and c and d satisfy c+d=0.8 to 3.0;
- (C) a platinum catalyst;
- and
- (D) a (meth)acrylate compound having a structure represented by the formula:
- wherein R stands for a hydrogen atom or a methyl group therein and having a melting point of 40° C. or above.
10 more elements
An addition-curable silicone rubber composition comprising:
- (A) an organopolysiloxane containing in one molecule at least two alkenyl groups bonded to silicon atoms, represented by the average compositional formula (1):
- R1aR2bSiO(4−a−b)/2
- wherein R1 represents a substituted or unsubstituted monovalent hydrocarbon group containing no aliphatic unsaturated bond;
- R2 represents an alkenyl group;
- and a is a number ranging from 0.96 to 2.00, b is a number ranging from 0.0001 to 0.5, and a and b satisfy a+b=1.90 to 2.04;
- (B) an organohydrogenpolysiloxane containing in one molecule at least two hydrogen atoms bonded to silicon atoms, represented by the average compositional formula (2):
- R3cHdSiO(4−c−d)/2
- wherein R3 represents a substituted or unsubstituted monovalent hydrocarbon group containing no aliphatic unsaturated bond;
- and c is a number ranging from 0.70 to 2.0, d is a number ranging from 0.005 to 1.0, and c and d satisfy c+d=0.8 to 3.0;
- (C) a platinum catalyst;
- and
- (D) a (meth)acrylate compound having a melting point of 40° C. or above,
- said component-(D) (meth)acrylate compound having a structure containing 1 to 4 aromatic ring(s) in the molecule.
10 more elements
An addition-curable silicone rubber composition comprising:
- (A) an organopolysiloxane containing in one molecule at least two alkenyl groups bonded to silicon atoms, represented by the average compositional formula (1):
- R1aR2bSiO(4−a−b)/2
- wherein R1 represents a substituted or unsubstituted monovalent hydrocarbon group containing no aliphatic unsaturated bond;
- R2 represents an alkenyl group;
- and a is a number ranging from 0.96 to 2.00, b is a number ranging from 0.0001 to 0.5, and a and b satisfy a+b=1.90 to 2.04;
- (B) an organohydrogenpolysiloxane containing in one molecule at least two hydrogen atoms bonded to silicon atoms, represented by the average compositional formula (2):
- R3cHdSiO(4−c−d)/2
- wherein R3 represents a substituted or unsubstituted monovalent hydrocarbon group containing no aliphatic unsaturated bond;
- and c is a number ranging from 0.70 to 2.0, d is a number ranging from 0.005 to 1.0, and c and d satisfy c+d=0.8 to 3.0;
- (C) a platinum catalyst;
- and
- (D) a (meth)acrylate compound having a melting point of 40° C. or above,
- said component-(D) (meth)acrylate compound being represented by the following formula (3):
- wherein R4 represents a hydrogen atom or a methyl group;
- X represents a divalent hydrocarbon group containing 1 to 4 aromatic ring(s), and having 6 to 30 carbon atoms, which may contain in the structure at least one atom selected from the group consisting of an oxygen atom, a silicon atom and a fluorine atom;
- and a represents an integer of 1 to 6.
13 more elements
Dependencies are inferred from the claim text.