Poly(urethane-isocyanurate) foams

Details Poly(urethane-isocyanurate) foams Poly(urethane-isocyanurate) foams

1979-03-14

1981-01-27

Cockeram, H. S.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

156331, 428310, 428313, 521114, 521116, 521117, 521125, 521128, 521905, 521914, 528 70, C08G 1814, C08G 1848, B32B 520

Patent

active

042476569

ABSTRACT:
Novel poly(urethane-isocyanurate) foams and their preparation are described. These foams are low density, non-friable, heat stable, polymeric reaction products of polyisocyanate and polyoxyalkylene polyol, the reaction products having a cross-link density in the range of about 1 cross-link per 400 to 750 atomic weight units. Processes are also provided for forming a foamed isocyanate-derived polymer on an oil-contaminated substrate and obtaining a firm bond of the polymer to the substrate.

REFERENCES:
patent: 3137662 (1964-06-01), Recktenwald
patent: 3280049 (1966-10-01), Hyre et al.
patent: 3635848 (1972-01-01), Rambosek
patent: 3697485 (1972-10-01), Rambosek et al.
patent: 3880782 (1975-04-01), Rambosek
patent: 3928258 (1975-12-01), Alexander
Ind. & Eng. Chem., vol. 56, Sep. 1964, pp. 26-31, by Scharz.
Dahm, Cellular Plastics, Nat. Academy of _Sciences, Publ. 1462, pp. 52-63.

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