Process for making visco-elastic foam

Details Process for making visco-elastic foam Process for making visco-elastic foam

2005-09-20

2005-09-20

Cooney, Jr., John M. (Department: 1711)

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

Synthetic resins

Cellular products or processes of preparing a cellular...

C252S182250, C252S182270, C521S130000, C521S170000

Reexamination Certificate

active

06946497

ABSTRACT:
Process for preparing a visco-elastic polyurethane foam by reacting a polyisocyanate composition with a polyol composition comprising b1) an EO-rich polyol; b2) a polyol with an EO content between 20-50% and a primary hydroxy content of at least 50%; b3) a polyol with an EO content between 10-20% and a primary hydroxy content of at least 50%; and b4) a polyoxyalkyleneglycol. Further provided is a polyol composition.

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