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US 4,394,461 AGranted
Azocarboxylate blowing agent
AssigneeUniroyal, Inc.
InventorPaul E. Stott
Life of this patent
Estimating the term…
Abstract
A foamable polyester resin composition is provided and a method for making the same. The composition comprises (a) a liquid unsaturated polyester resin, (b) an azocarboxylate, (c) an organic peroxide or hydroperoxide, (d) a proton donor, (e) a metal promoter, (f) optionally a surfactant, and (g) optionally a filler.
Claims10
A foamable and curable polyester composition consisting essentially of, all parts by weight (unless otherwise indicated):
- (a) 100 parts liquid unsaturated polyester resin;
- (b) 0.1-10 parts azocarboxylate of the formula
- (R.sup.x).sub.m (N.dbd.NCOO).sub.p (M.sup.y).sub.n
- wherein M is a metal;
- x is the valence of R and is 1-6, y is the valence of M and is 1-4, and mx=ny=p where p=1-24;
- and R is:
- (1) A, a mono- or polyvalent radical:
- C.sub.1 -C.sub.10 alkyl, haloalkyl;
- C.sub.5 -C.sub.6 cycloalkyl;
- C.sub.7 -C.sub.9 aralkyl;
- C.sub.7 -C.sub.9 alkaryl;
- phenyl, halophenyl;
- naphthyl;
- C.sub.4 -C.sub.10 oxydialkylene oxydiphenylene;
- or
- (2) COOM.sup.1, where M.sup.1 is the same as or different from M, or
- (3) COOR.sup.1 where R.sup.1 is A;
- or
- (4) COR.sup.2, where R.sup.2 is A or NH.sub.2
- (c) 0.1-4.0 parts hydrogen peroxide, organic peroxide or organic hydroperoxide,
- (d) 0.1-20 parts proton donor
- (e) 3-1000 ppm, based on metal, of metal promoter,
- (f) 0-2.0 parts surface active agent, and
- (g) 0-250 parts filler.
21 more elements
The composition of claim (1) wherein (b) is sodium azocarboxylate, (c) is methyl ethyl ketone peroxide, (d) is water and (e) is an organic salt of copper.
Dependencies are inferred from the claim text.