Breathable open cell urethane polymers

Details Breathable open cell urethane polymers Breathable open cell urethane polymers

1996-04-19

1997-11-11

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521137, 521174, C08G 1834

Patent

active

056865015

ABSTRACT:
A breathable or air-permeable, open cell, flexible urethane polymer suitable for use in cushions is formed from a foam-forming composition containing from about 0.5 to 2.0 parts by weight of butyl oleate, based upon 100 parts by weight polyol, under controlled pressure conditions maintained at or, preferably, below atmospheric pressure. The pressure during foaming is maintained in the range of about 0.5 to 1.0 bar, preferably 0.5 to 0.9 bar. Resultant air permeability is unexpectedly significantly increased over urethane polymers of equivalent composition. Other polymer properties are enhanced.

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patent: 4503150 (1985-03-01), Triolo
patent: 4608418 (1986-08-01), Czerwinski et al.
patent: 4777186 (1988-10-01), Stang et al.
patent: 4826882 (1989-05-01), Bredbenner et al.

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