Isocyanate-reactive compositions, rigid polyurethane foams and methods for their production
AssigneeCovestro LLC
InventorsBrandon W. Parks, Rick L. Adkins
Life of this patent
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Abstract
Isocyanate-reactive compositions and thermally insulating rigid polyurethane foams, such as those that can be used as a thermal insulation medium in the construction of refrigerated storage devices, are disclosed. The compositions include a halogenated olefin blowing agent and a polymer polyol. The polymer polyol includes (1) a base polyol having an OH number of at least 200 mg KOH/g; and (2) polymer particles dispersed in the base polymer, wherein the polymer particles comprise the reaction product of an ethylenically unsaturated composition comprising an ethylenically unsaturated fluorinated compound.
Claims15
An isocyanate-reactive composition comprising:
- (a) a polyol composition comprising a polymer polyol having an OH number of greater than 200 mg KOH/g, wherein the polymer polyol comprises:
- (1) a base polyol having an OH number of at least 200 mg KOH/g;
- and
- (2) polymer particles dispersed in the base polyol, wherein the polymer particles comprise the reaction product of an ethylenically unsaturated composition comprising an ethylenically unsaturated fluorinated compound;
- (b) a catalyst;
- (c) a physical blowing agent composition comprising at least 50% by weight, based on the total weight of the physical blowing agent composition, of a halogenated olefin;
- and
- (d) a carbon dioxide generating chemical blowing agent.
Dependencies are inferred from the claim text.