Room temperature vulcanizing compositions

Details Room temperature vulcanizing compositions Room temperature vulcanizing compositions

1995-03-23

1996-09-17

Bleutge, John C.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524858, 524863, C08K 524

Patent

active

055569145

ABSTRACT:
This application is concerned with room temperature vulcanizing compositions useful as mould making materials which are formed by mixing an alpha, omega dihydroxy polysiloxane, a condensation polydimethylsiloxane, catalyst and a crosslinking agent which comprises a tri- or tetra-alkoxy silane or siloxane in which the alkoxy groups contain more than two carbon atoms. Moulds made with these materials on epoxy masters show improved usage; the improvement is related to the size of the alkoxy "leaving group" and the proportion of crosslinker and condensation catalyst.

REFERENCES:
patent: 3719634 (1973-03-01), Clark et al.
patent: 4156674 (1979-05-01), Sumimura
patent: 4434283 (1984-02-01), Sattlegger et al.
patent: 5247011 (1993-09-01), Tsuji et al.

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