Compositions which crosslink in the presence of moisture at room

Details Compositions which crosslink in the presence of moisture at room Compositions which crosslink in the presence of moisture at room

1988-10-11

1990-07-31

Bleutge, John C.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

4283193, 428429, 428447, 528 34, 528 37, 528901, 524860, B32B 2728, B32B 1710, C08G 7704

Patent

active

049449893

ABSTRACT:
Compositions which can be stored in the absence of moisture, but crosslink in the presence of moisture at room temperature to form elastomers comprising a diorganopolysiloxane having terminal condensable groups, a silicon compound having at least three hydrolyzable groups bonded directly to silicon per molecule, an average of at least one acyloxy group being present as a hydrolyzable group per silicon atom in the silicon compound, and an organosilicon compound having at least one vicinal epoxy group, in which at least part of the organosilicon compound containing at least one vicinal epoxy group is a cyclic diorganopolysiloxane. These compositions are prepared by mixing under anhydrous conditions a diorganopolysiloxane having terminal condensable groups with a silicon compound having at least three hydrolyzable groups bonded directly to silicon per molecule, an average of at least one acyloxy group being present as a hydrolyzable group per silicon atom in the silicon compound and an organosilicon compound having at least one vicinal epoxy group, in which at least part of the organosilicon compound containing at least one vicinal epoxy group is a cyclic diorganopolysiloxane.

REFERENCES:
patent: 3886118 (1975-05-01), Nitzsche et al.
patent: 4115356 (1978-09-01), Hilliard
patent: 4208503 (1980-06-01), Martin
patent: 4245079 (1981-01-01), Matsumoto et al.
patent: 4296228 (1981-10-01), Innertsberger et al.
patent: 4721764 (1988-01-01), Fujiki et al.
patent: 4797446 (1989-01-01), Dietlein et al.

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