초록 ▼

Polyol blend compositions are provided containing a polyester polyol, especially an aromatic polyester polyol, a compatibilizing block copolymer of ethylene oxide and at least one other alkylene oxide having three or more carbon atoms in the molecule, the block copolymer being terminated by ethylene

Polyol blend compositions are provided containing a polyester polyol, especially an aromatic polyester polyol, a compatibilizing block copolymer of ethylene oxide and at least one other alkylene oxide having three or more carbon atoms in the molecule, the block copolymer being terminated by ethylene oxide blocks, and optionally other polyols. The blends are miscible with halohydrocarbon blowing agents such as trichlorofluoromethane and suitable for reaction with polyisocyanates to give polyisocyanurate and polyurethane foams.

대표청구항 ▼

In a process for producing a laminate comprising (A) contacting at least one facing sheet with a foam-forming mixture selected from the group consisting of polyisocyanurate and polyurethane foam-forming mixtures comprising an organic polyisocyanate, a blowing agent, a catalyst and a polyol component

In a process for producing a laminate comprising (A) contacting at least one facing sheet with a foam-forming mixture selected from the group consisting of polyisocyanurate and polyurethane foam-forming mixtures comprising an organic polyisocyanate, a blowing agent, a catalyst and a polyol component, the improvement which comprises utilizing a blend comprising: (a) about 10 to 50 percent by weight of a halogenated organic blowing agent, and (b) about 90 to 50 percent by weight of a polyol component comprising: (1) about 10 to 95 percent by weight of a polyester polyol, (2) about 1 to 50 percent by weight of a compatibilizer consisting essentially of a polyoxyalkylene polyol of the formula [Figure] wherein x is sufficiently large to provide a molecular weight of the oxypropylene chains of a least about 250 and wherein y is sufficiently large to provide about 10 to 90% of the total molecular weight of the compound, (3) about 0 to 35 percent by weight of an alkylene glycol having the formula [Figure] wherein R is hydrogen or lower alkyl of one to four carbon atoms and n is from 1 to 10, and (4) about 0 to 70 percent by weight of at least one other polyether polyol, and (B) foaming said foam-forming mixture.