Process for producing an open cell foam

Details Process for producing an open cell foam Process for producing an open cell foam

1977-06-21

1979-03-06

Foelak, Morton

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

2041592, 20415918, 260876R, 260889, 260890, 260892, 260894, 521 89, 521 95, 521140, 521915, B01J 110, B01J 112

Patent

active

041429567

ABSTRACT:
A process for producing an open cell foam by irradiating a composition comprising (a) a thermoplastic resin polymer blend including 1,2-polybutadiene as one component, (b) a photosensitizing agent and (c) a thermally decomposable foaming agent, with ultraviolet light having a wavelength ranging from about 254 to about 400 m.mu. to thereby cross-link mainly the 1,2-polybutadiene, and subsequently foaming the composition at a temperature higher than the softening point of the 1,2-polybutadiene and that of the thermoplastic resin polymer blended therewith and higher than the decomposition temperature of the foaming agent.

REFERENCES:
patent: 3098831 (1963-07-01), Carr
patent: 3240727 (1966-03-01), Scalari
patent: 3542702 (1970-11-01), Okada et al.
patent: 3562367 (1971-02-01), Shimohara et al.
patent: 3709806 (1973-01-01), Minami et al.
patent: 3717559 (1973-02-01), Oyama et al.
patent: 3816284 (1974-06-01), Kagiya et al.
patent: 3891724 (1975-06-01), Yaeda et al.
patent: 3981830 (1976-09-01), Takeuchi et al.
patent: 4029840 (1977-06-01), Shikinami et al.

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