Polyisocyanurate foam and laminates thereof and process for prod

Details Polyisocyanurate foam and laminates thereof and process for prod Polyisocyanurate foam and laminates thereof and process for prod

1980-11-14

1982-02-23

Cockeram, H. S.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

521112, 521125, 521137, 521170, 521174, 521902, 526270, 528249, 4284228, C08G 1862, C08G 1876, B32B 2700

Patent

active

043169350

ABSTRACT:
A foam characterized by the presence of isocyanurate groups which is the reaction product of a polymethylene polyphenyl isocyanate, such as that of the formula: ##STR1## wherein n is an integer from 1 to 8 inclusive, and a furan resin of the formula: ##STR2## wherein R is --CH.sub.2 -- or --CH.sub.2 --O--CH.sub.2 --, and the average value of m is such that the furan resin has a viscosity of up to 50,000 centipoises at 25.degree. C. The foam exhibits a low friability and an improved capacity to maintain its structural integrity when exposed to fire, and can be used in structural laminates.

REFERENCES:
patent: 2343972 (1944-03-01), Harvey
patent: 2601497 (1952-01-01), Brown
patent: 3940517 (1976-02-01), De Leon
patent: 4017461 (1977-04-01), Dunlop et al.
patent: 4029611 (1977-06-01), Cenker et al.
"FaRez B260" Technical Data Sheet, Quaker Oats Co., Chicago, Oct. 1978, 6 pages.
Theoni et al.-Jour. Cell Plast., Nov./Dec. 1971, pp. 294-301.
Bozer et al. 33rd Annual Tech. Conf. 1978, Soc. Plast. Industry, Sec. 6-B, pp. 1-8.
Translation of Belgium 834,468.

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