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US 10,894,857 B2Granted
Method of forming a polyurethane foam article
AssigneeBASF SE
InventorsMichael J. Krupa, Robert S. Coleman, David Shtern
Life of this patent
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Abstract
A method of forming a polyurethane foam article includes the step of forming a resin composition. The resin composition includes a polyol component, an amine catalyst, and a blowing component. The blowing component includes a hydrofluoroolefin and formic acid. The method also includes the steps of combining the resin composition, a recycled resin composition, and an isocyanate component to form a reaction mixture and discharging the reaction mixture to form the polyurethane foam article.
Claims12
A method of forming a polyurethane foam article, said method comprising the steps of:
- forming a recycled resin composition and leaving the recycled resin composition in an A-side vessel;
- forming a resin composition about 2 months or more after formation of the recycled resin composition, the resin composition comprising:
- (i) a polyol component consisting of:
- a first polyether polyol having a viscosity of less than about 5,000 cps at 25° C.;
- a second polyether polyol having a viscosity of greater than about 30,000 cps at 25° C.;
- a third polyether polyol having a viscosity of less than about 500 cps at 25° C.;
- and
- an aromatic polyester polyol;
- (ii) an amine catalyst;
- and
- (iii) a blowing component comprising:
- (a) a hydrofluoroolefin, and
- (b) formic acid;
- providing the resin composition in the A-side vessel having the recycled resin composition therein to form a resin composition mixture;
- providing an isocyanate component in a B-side vessel;
- combining the resin composition, the recycled resin composition, and the isocyanate component to form a reaction mixture;
- and
- discharging the reaction mixture to form the polyurethane foam article.
15 more elements
Dependencies are inferred from the claim text.