Liquid curable polyorganosiloxane compositions

Details Liquid curable polyorganosiloxane compositions Liquid curable polyorganosiloxane compositions

1986-11-07

1989-07-04

Bleutge, John C.

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

Synthetic resins

From silicon reactant having at least one...

528 31, 528 32, 525478, C08G 7706

Patent

active

048451649

ABSTRACT:
The curable polyorganosiloxane compositions of this invention comprise at least one vinyl-terminated liquid polydiorganosiloxane, a resinous organosiloxane reinforcing agent that includes diorganovinylsiloxy, triorganosiloxy and SiO.sub.2 units, an organosiloxane curing agent containing an average of at least three silicon-bonded hydrogen atoms per molecule, a diorganohydrogensiloxy terminated polydiorganosiloxane as a chain extender in an amount sufficient to provide from 10 to 85 percent of the silicon-bonded hydrogen atoms in the composition, and a platinum-containing hydrosilation catalyst. The compositions contain at least 1.5 vinyl radicals for each silicon-bonded hydrogen atom present in the composition. The cured elastomer is compressible, resilient and exhibits a hardness value of up to 100 on the Shore 00 durometer scale.

REFERENCES:
patent: 3284406 (1966-11-01), Nelson
patent: 3436366 (1969-04-01), Modic
patent: 3697473 (1972-10-01), Polmanteer et al.
patent: 3957717 (1976-05-01), Harada et al.
patent: 4340709 (1982-07-01), Jeram et al.
patent: 4472470 (1984-09-01), Modic
patent: 4484179 (1984-11-01), Kasday
patent: 4535141 (1985-08-01), Kroupa

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