Silicon rubber composition having excellent durability in repeat

Details Silicon rubber composition having excellent durability in repeat Silicon rubber composition having excellent durability in repeat

1993-09-29

1994-08-30

Marquis, Melvyn I.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From silicon reactant having at least one...

528 42, C08G 7706

Patent

active

053429133

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.

REFERENCES:
patent: 4057566 (1977-11-01), Carter et al.
patent: 4100136 (1978-07-01), Carter et al.
patent: 4985526 (1991-01-01), Kishita et al.
patent: 5073422 (1991-12-01), Konno et al.

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