Manufacture of soft and resilient foams

Details Manufacture of soft and resilient foams Manufacture of soft and resilient foams

1973-12-12

1977-12-06

Michl, Paul R.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

260 25AK, 260 25BE, C08J 900

Patent

active

040617017

ABSTRACT:
Composite soft and resilient foams are manufactured by injecting a foamable mixture of polyisocyanates, polyols, water or inert blowing agents and, if appropriate, auxiliaries, under pressure into a mold of which about 90 to 30% of the volume is filled with foamed, soft and resilient particles of olefin polymers of particle size from about 3 to 50 mm and bulk density from 5 to 100 g/l -- these particles being in loose form or fused or stuck together -- and allowing the reaction mixture to foam up.

REFERENCES:
patent: 3509079 (1970-04-01), Hyde
patent: 3582500 (1971-06-01), Carriere
patent: 3600340 (1971-08-01), Patton
patent: 3608031 (1971-09-01), Stastny

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