Method of making a low density, molded integral skin polyurethan

Details Method of making a low density, molded integral skin polyurethan Method of making a low density, molded integral skin polyurethan

1997-12-30

2000-01-04

Kuhns, Allan R.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 51, 264 53, B29C 4404, B29C 4406

Patent

active

060106492

ABSTRACT:
It has been found that non-chlorinated pentafluoropropane blowing agents may be used alone or in combination with water in a method of making flexible integral skin foams. For example, foams prepared using 1,1,1,3,3-pentafluoropropane (HFA-245fa) alone or in combination with water exhibit physical characteristics such as resistance to abrasion and cracking on flex comparable to conventional chlorinated fluorocarbon blown foams. The method of the the present invention produce foams which are suitable for use in many applications including, for example, shoe soles.

REFERENCES:
patent: 5100922 (1992-03-01), Wada et al.
patent: 5211873 (1993-05-01), Dams et al.
patent: 5350777 (1994-09-01), Yuge et al.
patent: 5672294 (1997-09-01), Lund et al.
patent: 5840781 (1998-11-01), Dietrich et al.
patent: 5856679 (1999-01-01), Barthelemy et al.

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