Polyoxyalkylene solubilizers for polyol blends
AssigneeSloss Industries Corporation
InventorsJohn S. Canaday, Ernest K. Moss
Life of this patent
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Abstract
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.
Claims24
A miscible blend for use in the manufacture of polyisocyanurate and polyurethane foams 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 ##STR10## wherein x is sufficiently large to provide a molecular weight of the oxypropylene chains of at 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 ##STR11## 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.
A polyol blend composition comprising
- (a) about 10 to 95 percent by weight of a polyester polyol,
- (b) about 1 to 50 percent by weight of a compatibilizer consisting essentially of a polyoxyalkylene polyol of the formula ##STR12## wherein x is sufficiently large to provide a molecular weight of the oxypropylene chains of at least about 250 and wherein y is sufficiently large to provide about 10 to 90% of the total molecular weight of the compound,
- (c) about 0 to 35 percent by weight of an alkylene glycol having the formula ##STR13## where R is hydrogen or lower alkyl of one to four carbon atoms and n is from 1 to 10, and
- (d) about 0 to 70 percent by weight of at least one other polyether polyol.
In a process for the preparation of a polyisocyanurate foam, said process comprising bringing together under foam-forming conditions an organic polyisocyanate, a blowing agent, a trimerization catalyst, and a minor amount of a polyol component, the improvement 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 polyol,
- (2) about 1 to 50 percent by weight of a compatibilizer consisting essentially of a polyoxyalkylene polyol of the formula ##STR14## wherein x is sufficiently large to provide a molecular weight of the oxypropylene chains of at 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 ##STR15## 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.
In a process for the preparation of a polyurethane foam, said process comprising bringing together under foam-forming conditions 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 ##STR16## wherein x is sufficiently large to provide a molecular weight of the oxypropylene chains of at 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 ##STR17## 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.
Dependencies are inferred from the claim text.