Phthalate polyester polyol-based compositions and high dimensionally stable all water-blown spray polyurethane foam derived therefrom
AssigneeStepan Company
InventorWarren Kaplan
Life of this patent
Estimating the term…
Abstract
The invention relates to methods and compositions for preparing all water blown spray polyurethane foams by reacting a polyisocyanate with a polyol blend. The polyol methods and compositions of the invention comprises a polyol component, water, a cell opening agent and a diluent. Polyurethane foams prepared according to the invention meet the physical and processing requirements stipulated by the industry.
Claims13
1-21. (Cancelled).
A polyol blend suitable for use in a method for preparing a polymeric spray foam comprising urethane units and having an open-cell content sufficient to resist shrinkage comprising reacting an aromatic polymeric isocyanate with a polyol blend at an NCO/OH index of from about 85-125, the polyol blend comprising:
- (a) from about 20% to about 90% by weight of the blend of a polyol formulation comprising a polyester polyol, a polyether polyol, a Mannich polyol, or mixtures thereof;
- (b) water as a primary blowing agent;
- (c) a cell opening agent which is a divalent metal salt of a fatty acid;
- and (d) from about 0.05% to about 50% by weight of the blend of a diluent or mixture of diluents.
A polyol blend suitable for use in a method for preparing a polymeric spray foam comprising urethane units and having an open-cell content sufficient to resist shrinkage comprising reacting an aromatic polymeric isocyanate with a dispersed polyol blend at an NCO/OH index of from about 85-125, the polyol blend comprising:
- (a) a polyol formulation comprising (i) a modified diethylene glycol phthalate polyester polyol having an OH value of about 290-325, or (ii) a modified diethylene glycol phthalate polyester polyol having an OH value of about 230-250, a Mannich polyol having an OH value of 415-435, and diethylene glycol;
- (b) water as a primary blowing agent;
- (c) a cell opener comprising calcium stearate;
- (d) a diluent selected from the group consisting of tris-isopropylchlorophosphate, an alkoxylated nonyl phenol, propylene carbonate, a monobasic ester, a dibasic ester and mixtures thereof;
- (e) a catalyst selected from the group consisting of dimethylethanolamine, dimethylcyclohexylamine, a catalyst which contains about 70% bis(2-dimethylaminoethyl)ether in 30% dipropylene glycol or a mixture thereof;
- and (f) an alkoxylated polysiloxane surfactant.
31-36. (Cancelled).
Dependencies are inferred from the claim text.