Process for making flexible polyurethane foams

Details Process for making flexible polyurethane foams Process for making flexible polyurethane foams

1997-11-04

2000-02-01

Cooney, Jr., John M.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521159, 521160, 521170, 521174, C08G 1810

Patent

active

060203900

ABSTRACT:
Process for preparing a flexible polyurethane foam by reacting a polyisocyanate and two different polyols under foam forming conditions so as to prepare a rigid foam, by crushing the rigid foam so obtained and by subjecting the flexible foam so obtained to a heat treatment. Flexible foams are obtained which do not show a major glass transition temperature between -100.degree. C. and +25.degree. C.

REFERENCES:
patent: 3709966 (1973-01-01), Gambardella et al.
patent: 4454248 (1984-06-01), Pollock et al.
patent: 5459170 (1995-10-01), Bleys et al.
patent: 5491176 (1996-02-01), Huygens
patent: 5773483 (1998-06-01), Eling et al.

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