Method of producing a polyurethane foam from a polyol containing

Details Method of producing a polyurethane foam from a polyol containing Method of producing a polyurethane foam from a polyol containing

1984-12-28

1986-04-08

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521131, 521172, 521173, C08G 1814

Patent

active

045813841

ABSTRACT:
A method for producing polyester modified, polyurethane foam having a density of from about 1 to 40 pounds per cubic foot, and the product produced by said method, are disclosed and claimed. A first composition or mixture is prepared comprising a relatively high molecular weight polyol, and a minor but effective amount of a hydroxy-containing, unsaturated polyester, soluble in or miscible with the polyol; a second composition or mixture is prepared comprising an isocyanate or polyisocyanate soluble in or miscible with a vinylidene type cross-linking monomer for the unsaturated polyester, the cross-linking monomer being exemplified by styrene, said first and second mixtures being blended together just prior to production of the foam, thereby enabling the production of a more homogeneous foamed product having improved physical properties, especially those enhancing the product's usefulness for insulation purposes.

REFERENCES:
patent: 3860537 (1975-01-01), Graham et al.
patent: 3886229 (1975-05-01), Hutchinson et al.
patent: 4386166 (1983-05-01), Peterson et al.

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