Process for making visco-elastic foams

Details Process for making visco-elastic foams Process for making visco-elastic foams

2011-05-24

2011-05-24

Eashoo, Mark (Department: 1767)

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

Synthetic resins

Cellular products or processes of preparing a cellular...

C252S182250, C252S182270, C521S137000, C521S155000, C521S170000, C528S076000, C568S620000

Reexamination Certificate

active

07947756

ABSTRACT:
Process for making a slabstock, visco-elastic, flexible, polyurethane foam which process comprises reacting a polyisocyanate and a polyol at an index of 60-95 and using a blowing agent, wherein 5-50 and preferably 10-40% by weight of the polyol used is castor oil. The foams and a polyol composition are claimed as well.

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Oertel, Dr. G., Polyurethane Handbook, 2ndedition, Section 5.1 “Slabstock Foams”, p. 178- ; Hauser Publishers, 1993.
Woods, G., ICI Polyurethanes Book, 2ndedition, 1990, pp. 32-35.

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