Polyol composition and polyisocyanate-based foam prepared therefrom
OwnerFrancesca Pignagnoli, Paolo Golini +1inventors
InventorsFrancesca Pignagnoli, Paolo Golini, Eileen Lancaster
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Abstract
A polyol composition is disclosed that comprises an aromatic polyether polyol, preferably based on the condensation product of a phenol with an aldehyde and as blowing agent, formic acid. The polyol composition finds utility in the manufacture of polyurethane and particularly polyisocyanurate foams having attractive flameretardant and reduced smoke generation characteristics.
Claims22
1) A polyol composition suitable for the preparation of a rigid polyisocyanate-based foam containing one or more polyether or polyester polyols and a blowing agent, wherein;
- a) the blowing agent comprises formic acid;
- and
- b) the polyol comprises an aromatic polyoxyalkylene polyol based on an initiator obtained from the condensation of a phenol with an aldehyde.
13) A polyurethane foam obtained by bringing together under foam-forming conditions a polyisocyanate with a polyol composition characterized in that:
- a) the polyisocyanate is present in an mount to provide for an isocyanate reaction index of from 80 to 150;
- and
- b) the polyol composition comprises (I) formic acid;
- and (ii) an aromatic polyoxyalkylene polyol based on an initiator obtained from the condensation of a phenol with an aldehyde.
14) A polyisocyanurate foam obtained by bringing together under foam-forming conditions a polyisocyanate with a polyol composition characterized in that:
- a) the polyisocyanate is present in an mount to provide for an isocyanate reaction index of from 150 to 600;
- and
- b) the polyol composition comprises (1) formic acid;
- and (ii) an aromatic polyoxyalkylene polyol based on an initiator obtained from the condensation of a phenol with an aldehyde.
16) A process for preparing a closed-celled polyisocyanurate foam by bringing into contact under foam-forming conditions a polyisocyanate with a polyol composition in the presence of a blowing agent mixture wherein the polyol composition comprises an aromatic polyester polyol and an aromatic polyether polyol;
- and wherein the blowing agent mixture comprises formic acid and a hydrofluoroalkane selected from the group consisting of tetrafluoroethane, pentafluoropropane, heptafluoropropane and pentafluorobutane, and characterized in that the polyisocyanate is present in an amount to provide for an isocyanate reaction index of from greater than 150 to 600.
19) A process for preparing a closed-celled polyisocyanurate foam by bringing into contact under foam-forming conditions a polyisocyanate with a polyol composition in the presence of a blowing agent mixture wherein the polyol composition comprises an aromatic polyester polyol and an aromatic polyether polyol;
- and wherein the blowing agent mixture comprises formic acid and a hydrocarbon selected from the group consisting of butane, pentane, cyclopentane, hexane, cyclohexane, and heptane, and the isomers thereof and characterized in that the polyisocyanate is present in an amount to provide for an isocyanate reaction index of from greater than 150 to 600.
21) A two component foam forming system that comprises:
- a) an aromatic polyisocyanates having an average of from 2.8 to 3.2 isocyanate groups per molecule;
- and
- b) a polyol composition that contains (i) an aromatic polyester polyol and an aromatic polyether polyol;
- and (ii) a blowing agent mixture which comprises formic acid and a hydrofluoroalkane selected from the group consisting of tetrafluoroethane, pentafluoropropane, heptafluoropropane and pentafluorobutane.
22) A two component foam forming system that comprises:
- a) an aromatic polyisocyanates having an average of from 2.8 to 3.2 isocyanate groups per molecule;
- and
- b) a polyol composition that contains:
- (i) an aromatic polyester polyol and an aromatic polyether polyol;
- and (ii) a blowing agent mixture which comprises formic acid and a hydrocarbon selected from the group consisting of butane, pentane, cyclopentane, hexane, cyclohexane, and heptane, and the isomers thereof
Dependencies are inferred from the claim text.