Single-component polysulphide based sealant compositions

Details Single-component polysulphide based sealant compositions Single-component polysulphide based sealant compositions

1994-02-22

1995-04-25

Bleutge, John C.

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...

524881, 528374, C08K 334

Patent

active

054099854

ABSTRACT:
A one-part polysulfide sealant composition comprises a mercaptan-terminated liquid polysulfide, an oxidising agent to cure the catalyst a desiccant such as a molecular sieve, to keep the composition dry and thus prevent premature activation of the catalyst, and a cure accelerator having an acrylate or methacrylate functionality of 2 or more, preferably an acrylated liquid polysulfide or a polyfunctional methacrylate monomer. The use of this accelerator avoids the need for toxic amounts of barium oxide desiccant and substantially shortens the tack-free time on curing.

REFERENCES:
patent: 3659896 (1972-05-01), Smith et al.
patent: 3856740 (1974-12-01), Takahashi et al.
patent: 4110295 (1978-08-01), Wilhelm et al.
patent: 4689395 (1987-08-01), Bergmann et al.
patent: 5177182 (1993-01-01), Lee et al.

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