Curable compositions

Details Curable compositions Curable compositions

1995-12-18

1998-04-28

Glass, Margaret W.

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...

525100, C08K 554

Patent

active

057445290

ABSTRACT:
A curable composition comprises a polysiloxane additive having at least one unit R.sub.a SiO.sub.(4-a)/2 and at least one unit R.sub.b R.sup.1 SiO.sub.(3-b)/2 wherein R is a C.sub.1-12 hydrocarbon, R.sup.1 is --(CH.sub.2).sub.n (OR.sup.2).sub.m X where R.sup.2 is C.sub.2-3 alkylene, a is 0, 1, 2 or 3 and b is 0, 1 or 2, and X is OH or --OCOCR.sup.3 .dbd.CH.sub.2 where R.sup.3 is H, methyl or ethyl, n is 2 to 5 and m is 8 to 50, provided where X is OH, n is 3 and m is 18. The compositions are useful with polyacrylates as overprint varnishes with improved stability of friction coefficients. Also disclosed is a method for making the additives.

REFERENCES:
patent: 4146511 (1979-03-01), Moriya et al.
patent: 4920168 (1990-04-01), Nohr et al.
patent: 5248783 (1993-09-01), O'Lenick
patent: 5296625 (1994-03-01), O'Lenick, Jr. et al.
patent: 5514731 (1996-05-01), Nakai
Polym. Bull. 1988; vol. 20 (5) pp. 455-461. E. Wu et al. `Comb polysiloxanes with w-hydroxyoligo(oxyethylene) side chains`.
Polym. Int. 1992 vol. 28(2) pp. 139-150. Kiraly and Vincent `The synthesis and Characterisation of poly(ethylene-oxide) and b-poly(dimethylsiloxane) diblock polymer.`

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