Silicon rubber composition having excellent durability in repeated mold release
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United States of America Patent
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Aug 30, 1994
Issued Date -
N/A
app pub date -
Sep 29, 1993
filing date -
Nov 29, 1990
priority date (Note) -
Expired
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Abstract
An addition-curable type rubber composition comprising a vinyl-containing organopolysiloxane as a base polymer and, particularly, further comprising as a crosslinking agent an organohydrogenpolysiloxane which contains, in its molecule, at least one unit having the following formula: ##STR1## wherein J is an alkylene group of from 2 to 4 carbon atoms, Rf is a perfluoropolyether group, and a is an integer of from 0 to 2. The composition has excellent durability in repeated mold release, and a mold prepared from the composition is able to produce moldings of constant quality even when molding is repeated a large number of times.
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