Room temperature vulcanizable organopolysiloxane composition and

Details Room temperature vulcanizable organopolysiloxane composition and Room temperature vulcanizable organopolysiloxane composition and

1992-06-03

1994-02-15

Marquis, Melvyn I.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

523209, 523212, 524588, 524863, 528 17, C08K 906

Patent

active

052867668

ABSTRACT:
A room temperature vulcanizable organopolysiloxane composition comprises (A) a diorganopolysiloxane which is blocked with an alkoxy group at both ends of a molecular chain thereof, (B) a tri or tetraalkoxysilane, (C) a titanium curing catalyst, (D) a silica filler, and (E) an alkoxysilane which is less hydrolyzable than the alkoxysilane of (B). The composition yields a cured product having high strength and high elongation and is low in viscosity and extrusion rate. A method for preparing the composition is also provided in which the ingredients (A) to (D) are first mixed together, to which the ingredient (E) is added.

REFERENCES:
patent: 4670532 (1987-06-01), Lucas
patent: 4687829 (1987-08-01), Chaffie et al.

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