Low consistency, one-part silicone elastomers

Details Low consistency, one-part silicone elastomers Low consistency, one-part silicone elastomers

1985-09-27

1986-09-30

Marquis, Melvyn I.

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...

528 24, 528 34, 528 37, 528 41, 525474, 525477, C08L 8304

Patent

active

046147608

ABSTRACT:
A one-part silicone elastomeric composition that is flowable or easily extruded is prepared by mixing a hydroxyl endblocked polydiorganosiloxane, a difunctional silane having two amido radicals, and an organic peroxide suitable for vulcanizing silicone rubber. A nonacidic filler is optional. After being put in place, the composition is exposed to moisture to activate a chain extension reaction that increases the molecular weight of the polydiorganosiloxane, to improve the physical properties of the cured silicone elastomer. After chain extension has taken place, the composition is heated to activate the organic peroxide, thereby crosslinking the composition into a silicone elastomer. The composition is useful as a potting and encapsulating material.

REFERENCES:
patent: 3766127 (1973-10-01), Clark et al.
patent: 3766128 (1973-10-01), Brady et al.
patent: 3817909 (1974-06-01), Toporcer et al.
patent: 4020044 (1977-04-01), Crossan et al.
patent: 4347336 (1982-08-01), Homan et al.

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