Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1984-10-26
1985-10-22
Foelak, Morton
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521134, 521154, C08J 914
Patent
active
045489580
ABSTRACT:
Moisture curable, foamable compositions, that do not slump appreciably in the uncured state when applied on a vertical surface, consist essentially of an RTV elastomeric composition, a liquified blowing agent and finely divided silica. The RTV elastomeric composition comprises the product obtained by mixing (1) at least two hydroxyl endblocked polymers selected from diorganosiloxane homopolymers and copolymers, and (2) an effective amount of a moisture reactive crosslinker for the hydroxyl endblocked polymer where from 0 to 80% by weight of said hydroxyl enblocked polymers is a graft copolymer derived from a liquid polydiorganosiloxane and an ethylenically unsaturated organic monomer. When the silica content is less than 10 percent by weight of the composition or the blowing agent concentration exceeds 20 percent by weight of said composition, the composition contains a slump inhibiting amount of said graft copolymer.
REFERENCES:
patent: 4229548 (1980-10-01), Sattleger et al.
patent: 4368279 (1983-01-01), Modic et al.
Bauman Therese M.
Lee Chi-Long
Dow Corning Corporation
Foelak Morton
Spector Robert
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