Polyol composition containing a hydrocarbon blowing agent
AssigneeBASF SE
InventorsWalter R. White, III, Robert E. Riley, Jimmy L. Patterson, James A. Mullins
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Abstract
The present invention discloses a polyol resin composition containing a polyether polyol blend, a polyester polyol, and a hydrocarbon blowing agent. The polyether polyol blend has at least a diamine initiated polyol, a propylene oxide polyol, and a polyethylene terephthalate initiated polyol having a functionality of from 2.3 to 3.0. The polyester polyol is preferably a phthalic anhydride initiated polyester polyol. The blowing agent is a C4-C6 hydrocarbon. Also disclosed is a method of producing a polyurethane foam combining the above mentioned polyol resin and an isocyanate component.
Claims4
A method for forming a polyurethane foam comprising the steps of:
- a) providing a polyether polyol blend comprising a mixture of:
- 1) a toluene diamine and ethylene diamine co-initiated polyol having from 20 to 30 percent ethylene oxide and 70 to 80 percent propylene oxide;
- 2) a sucrose and dipropylene glycol co-initiated propylene oxide polyol;
- and
- 3) a polyethylene terephthalate initiated polyol blend having a functionality of between 2.3 and 3.0;
- b) providing a polyester polyol;
- c) providing a C4-C6 hydrocarbon blowing agent;
- d) combining the polyether polyol blend, polyester polyol and blowing agent to form a polyol resin;
- e) providing a polyisocyanate component
- f) providing a catalyst;
- and
- g) combining the polyol resin with the polyisocyanate component and catalyst to form a polyurethane foam.
Dependencies are inferred from the claim text.