The Celotex Corporation

Jim Walter Research Corp.

Scott C. Snider

Center for Applied Engineering, Inc.

Scott C Snider

Alberto DeLeon

Michael E Londrigan

Kenneth G Trout

An isocyanate-terminated quasi-prepolymer is prepared by reacting an organic polyisocyanate and a polyester polyol which comprises the reaction product of a polycarboxylic acid component and ethylene glycol or a mixture of ethylene glycol and at least one other glycol. The use of the quasi-prepolymer in the preparation of rigid cellular polymers, especially polyisocyanurate foams, enhances the thermal insulating properties of the foams, and helps to reduce their cost and blowing agent usage.

Manufacture of polyisocyanate prepolymers using ethylene glycol and

Rigid cellular polymers are made by reacting an organic polyisocyanate with a polyol component comprising a polyester polyol having a free glycol content of less than about 7 percent by weight of the polyester polyol in the presence of a blowing agent. The use of the polyester polyol enhances the thermal insulating properties of the foams.

Rigid foam with improved 'K' factor by reacting a polyisocyanate and

Rigid cellular polymers are made by reacting an isocyanate-terminated quasi-prepolymer with a polyol component comprising a polyester polyol having a free glycol content of less than about 7 percent by weight of the polyester polyol in the presence of a blowing agent. The combined use of the quasi-prepolymer and the polyester polyol enhances the thermal insulating properties of the foams.

Rigid foam with improved 'k' factor by reacting a polyisocyanate

This invention relates to a process for preparing cellular polymers having urethane groups, isocyanurate groups, or both. The cellular polymers are prepared by reacting an organic polyisocyanate with a polyol in the presence of a blowing agent, a catalyst, and a perfluorinated hydrocarbon or a mixture of perfluorinated hydrocarbons. The use of the perfluorinated additives enhances the thermal insulating properties of the forms.

Rigid foam with improved 'K' factor from perfluorinated hydrocarbons

Polyisocyanurate foams are prepared by reacting together an organic polyisocyanate, a blowing agent, a trimerization catalyst, and a minor amount of a polyol mixture prepared by digesting polyalkylene terephthalate, particularly polyethylene terephthalate, with a polyol, especially a glycol. Laminates of such foams exhibit a high degree of fire resistance, low smoke evolution on combustion, low foam friability and high compressive strength.

Polyisocyanurate foams from digestion products of polyalkylene

Polyisocyanurate foams are prepared by reacting together an organic polyisocyanate, a blowing agent, a trimerization catalyst, and a minor amount of a polyol blend comprising

Alkoxylated aromatic amine-aromatic polyester polyol blend and

Cellular foams, particularly polyisocyanurate foams, are prepared by reacting together an organic polyisocyanate, a blowing agent, a trimerization catalyst, and a minor amount of a polyol mixture prepared by the transesterification with a glycol of a by-product fraction from the manufacture of dimethyl terephthalate, the major portion of said fraction comprising about 15 to 70 weight percent of dimethyl terephthalate, and about 85 to 30 weight percent of a mixture of monomethyl terephthalate, bi-ring esters and polymeric materials. Laminates of such foams exhibit a high degree of fire resistance, low smoke evolution on combustion, low foam friability and high compressive strength.

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St. Petersburg, FL, United States of America

Scott C Snider