Claims
- 1. A process for producing a compound-rubber-based graft copolymer which comprises:
- (a) emulsion-polymerizing an organosiloxane with a cross-linking agent for polyorganosiloxane rubber to obtain a polyorganosiloxane-rubber component;
- (b) polymerizing an alkyl (meth)acrylate with a cross-linking agnet for polyalkyl (meth)acrylate rubber and a graft-linking agent for polyalkyl (meth)acrylate rubber in a state where they are impregnated into said polyorganosiloxane rubber component, said second polymerization providing a compound rubber having an average particle diameter of 0.08 to 0.6 .mu.m and a structure wherein 7.2 to 92. 8% by weight of the polyorganosiloxane rubber component and 92.8 to 7.2% by weight of the polyalkyl (meth)acrylate rubber component are tangled with each other so as not to separate, the total amount of the polyorganosiloxane rubber component being 100% by weight of the compound rubber; and
- (c) graft-polymerizing one or more vinyl monomer onto the compound rubber.
- 2. A process for producing a compound-rubber-based graft copolyemr which comprises:
- (a) emulsion-polymerizing an organo-siloxane with a cross-linking agent fro polyorganosiloxane rubber and a graft-linking agent for polyorganosiloxane rubber to obtain a polyorganosiloxane rubber component;
- (b) polymerizing an alky (methacrylate with a cross-linking agent for polyalky (meth)acrylate rubber and a graft-linking agent for polyalkyl (methacrylate rubber in a state where they are impregnated into said polyorganosiloxane rubber component, said second polymerization providing a compound rubber having an average particle diameter of 0.08 to 0.6 .mu.m and a structure wherein 7.2 to 92.8% by weight of the polyorganosiloxane rubber component and 92.8 to 7.2% by weight of the polyalkyl (meth)-acrylate rubber component are tangled with each other so as not to separate, the total amount of the polyorganosiloxane rubber component and the polyalkyl (meth)acrylate rubber component being 100% by weight of the compound rubber; and
- (c) graft-polymerizing one or more vinyl monomer onto the compound rubber.
- 3. A process according to claim 1 or 2, wherein the amounts of the polyorganosiloxane rubber component and the polyalkyl (meth)acrylate rubber component are 7.2 to 20% by weight and 92.8 to 80% by weight, respectively.
- 4. A process according to claim 1 or 2, wherein the main skeleton of polyorganosiloxane rubber has repeated units of dimethylsiloxane and the main skeleton of polyalkyl (meth)acrylate rubber component has repeating units of n-butyl acrylate.
- 5. A process according to claim 1 or 2, wherein the vinyl monomer is aromatic alkenyl compounds or methacrylates.
Priority Claims (1)
Number |
Date |
Country |
Kind |
61-214871 |
Sep 1986 |
JPX |
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Parent Case Info
This is a continuation of application Ser. No. 07/379,197, filed Jul. 13, 1989, which is a continuation of Ser. No. 07/095,001, filed Sep. 10, 1987, now U.S. Pat. No. 4,894,415, now abandoned.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
4894415 |
Sasaki et al. |
Jan 1990 |
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Foreign Referenced Citations (4)
Number |
Date |
Country |
0246537 |
May 1987 |
EPX |
2539572 |
Sep 1975 |
DEX |
2717192 |
Apr 1977 |
DEX |
2376189 |
Jul 1978 |
FRX |
Continuations (2)
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Number |
Date |
Country |
Parent |
379197 |
Jul 1989 |
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Parent |
95001 |
Sep 1987 |
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