Polyisocyanurate foams based on esterified DMI oxidation residue

Details Polyisocyanurate foams based on esterified DMI oxidation residue Polyisocyanurate foams based on esterified DMI oxidation residue

1979-10-03

1980-12-02

Cockeram, H. S.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521172, 521173, 521902, C08G 1824, C08G 1842

Patent

active

042372380

ABSTRACT:
Polyisocyanurate foams are disclosed which are characterized by a combination of a high degree of fire resistance with low smoke evolution, low foam friability yet high compressive strength, and, most unexpectedly, the formation of a protective intumescent char over unburnt foam when the foam is subjected to combustion.
This combination of advantageous features is achieved by employing in the foam forming reaction a minor amount of a polyol mixture prepared by the transesterification, with a glycol of molecular weight from about 60 to about 400, of a residue obtained from the manufacture of dimethyl terephthalate.

REFERENCES:
patent: 3647759 (1972-03-01), Walker
patent: 4039487 (1977-08-01), Kolakowski
patent: 4048104 (1977-09-01), Svoboda
patent: 4100354 (1978-07-01), Owen
patent: 4184022 (1980-01-01), Lawyer

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