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

1996-12-09

1997-08-26

Foelak, Morton

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

521172, C08G 1834, B32B 326

Patent

active

056609264

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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