| 摘要 |
PURPOSE:A composition that is obtained by adding a fluorine-containing polysiloxane as a solubilizer to a base polymer of an acrylic polymer and polydiorganosiloxane, thus giving rubber-like elastomer of heat resistance, cold resistance, mechanical strength and oil resistance. CONSTITUTION:(A) 100pts.wt. of the base polymer which is composed of (i) 90- 10wt% of an acrylic polymer curable to give a rubber-like elastomer, preferably from acrylates and 0.1-20wt% of a crosslinking monomer, preferably a diene and (ii) 10-90wt% of polydiorganosiloxane of 1,000-10,000 average polymerization degree, bearing monovalent hydrocarbon groups as the organic groups linking to the silicon atoms, whose 0.02-5mol% is vinyl, preferably the remainings are methyls, in case of increasing cold resistance, containing 5-10mol% of phenyl groups, are combined with (B) 0.5-30pts.wt. of polysiloxane of 5-10,000 average polymerization degree, containing 15-50mol% of fluorine-containing organic groups among organic groups connecting to silicon atoms, preferably 3,3,3- trifluoropropyl.
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