High equivalent weight polyester polyols for closed cell, rigid

Details High equivalent weight polyester polyols for closed cell, rigid High equivalent weight polyester polyols for closed cell, rigid

1995-02-13

1997-02-25

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521173, C08G 1834

Patent

active

056059400

ABSTRACT:
A closed cell, rigid polymer foam which comprises the reaction product of a polyisocyanate and an isocyanate-reactive component in the presence of a catalyst and a hydrogen-containing blowing agent or a mixture of a hydrogen-containing blowing agent and at least one co-blowing agent wherein the isocyanate-reactive component comprises (a) a hydroxy terminated polyester having an equivalent weight greater than about 350, or (b) a mixture of the hydroxy terminated polyester with at least one other isocyanate-reactive compound. Foams prepared with the hydroxy terminated polyester have superior shrinkage resistance, strength and long-term insulating efficiency.

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W. W. Reichmann et al., "Polyester Polyols in Rigid Polyurethane and Polyisocyanurate Foams for Structural Building Panels", Journal of Cellular Plastics, vol. 24, Nov. 1988, pp. 601-610.

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