Method for preparing hard polyurethane and polyisocyanurate foam

Details Method for preparing hard polyurethane and polyisocyanurate foam Method for preparing hard polyurethane and polyisocyanurate foam

1990-03-02

1992-07-21

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521114, 521115, 521116, 521117, 521124, 521125, 521128, 521131, 521163, 521172, 521174, C08G 1808

Patent

active

051323320

ABSTRACT:
A method for preparing hard polyurethane and polyisocyanurate foams wherein an isocyanate and an active hydrogen containing compound are made to react in the presence of a catalyst, a foam stabilizer and a blowing agent which contains chloropropane, the used foam stabilizer being mainly of the non silicon type.

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