Catalyzed one-shot system for molding thermoset polyurethanes

Details Catalyzed one-shot system for molding thermoset polyurethanes Catalyzed one-shot system for molding thermoset polyurethanes

1977-05-31

1978-10-10

Rzucidlo, Eugene C.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 37N, 528 55, 528 60, 528 77, 528 85, C08G 1822

Patent

active

041195949

ABSTRACT:
According to a preferred practice of the invention, thermoset polyurethanes are molded from a mixture of solid particles of hydroquinone di-(beta-hydroxyethyl)ether (HQEE) and zinc stearate dispersed in a liquid mixture of a polyether polyol and a liquid form of diphenylmethane diisocyanate. The use of the HQEE chain extender and the zinc stearate catalyst provides a unique one-shot molding mixture that is relatively unreactive at room temperature, but polymerizes and cures rapidly upon heating. It has a pot life of at least several hours and is suitable for use in injection molding equipment generally used in processing thermoplastic material.

REFERENCES:
patent: 3016364 (1962-01-01), Muller
patent: 3203932 (1965-08-01), Frisch et al.
patent: 3694389 (1972-09-01), Levy
patent: 3711440 (1973-01-01), Chadwick
patent: 3899467 (1975-08-01), Bonk et al.
patent: 3933937 (1976-01-01), Rhodes, Jr. et al.
patent: 3933938 (1976-01-01), Rhodes, Jr. et al.
patent: 4035467 (1977-07-01), Campbell et al.

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