Novel process for making flexible polyurethane cellular products

Details Novel process for making flexible polyurethane cellular products Novel process for making flexible polyurethane cellular products

1983-11-07

1986-04-01

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

249170, 264 53, 264 54, 264DIG5, 264DIG13, 264DIG15, 425817R, B29C 6722, B29C 938, B29C 3910

Patent

active

045797005

ABSTRACT:
A process for making molded flexible polyurethane cellular products which do not substantially shrink or change dimensionally upon cooling is provided by exposing the curing product to atmospheric pressure while in the confines of the mold. Exposure can be accomplished by unlatching the mold or opening a port at an appropriate time after the reaction mixture was introduced into the mold so as to burst the cell walls of the polyurethane product.

REFERENCES:
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patent: 4285893 (1981-08-01), Contastin
Alderfer, Sterling, "One-Shot" Polyurethane Production, in Rubber Age, Apr. 1963, pp. 89-93.

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