Fast curing oximo-ethoxy functional siloxane sealants

Details Fast curing oximo-ethoxy functional siloxane sealants Fast curing oximo-ethoxy functional siloxane sealants

1989-05-26

1990-11-27

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...

524469, 524588, 524858, 524860, 528 18, 528 33, 528 34, C08L 8304

Patent

active

049736230

ABSTRACT:
A room temperature curing composition which cures fast and has good reversion resistance and good package stability is a mixture of 66.75 to 89.4 weight percent of a hydroxyl endblocked polydiorganosiloxane; 5.5 to 10 weight percent of a tetrafunctional ethoxy-ketoximo silane mixture having 6 to 27 weight perent tetraketoximosilane, 9 to 39 weight percent of monoethoxytriketoximosilane, 38 to 60 weight percent of diethoxydiketoximosilane, and 5.5 to 25 weight percent triethoxymonoketoximosilane; 0.1 to 0.25 weight percent of a tin catalyst, 0 to 3 weight percent of an adhesion promoter, and 5 to 20 weight percent of reinforcing silica. These compositions cure to elastomeric materials useful as caulking materials, adhesives, coatings and encapsulating materials for construction and automotive industries.

REFERENCES:
patent: 3189576 (1965-06-01), Sweet
patent: 4371682 (1983-02-01), Hashimoto
patent: 4503210 (1985-03-01), Von Au et al.
patent: 4657967 (1987-04-01), Klosowski et al.

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