Isocyanate-reactive compositions, rigid polyurethane foams and methods for their production
AssigneeCovestro LLC
InventorsBrandon W. Parks, Rick L. Adkins
Life of this patent
Estimating the term…
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.
Claims11
1-10. (canceled)
A rigid polyurethane foam comprising the reaction product of a reaction mixture comprising:
- (a) a polyisocyanate present in an amount sufficient to provide the reaction mixture with an isocyanate index of 90 to 150;
- (b) 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, the polymer particles comprising a reaction product of an ethylenically unsaturated composition comprising an ethylenically unsaturated fluorinated compound;
- (c) a catalyst;
- (d) 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
- (e) a carbon dioxide generating chemical blowing agent.
Dependencies are inferred from the claim text.