Polyurethane prepolymers based on oleochemical polyols
AssigneeHenkel Kommanditgesellschaft
InventorsHermann Kluth, Alfred Meffert
Life of this patent
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Abstract
Polyurethane prepolymers containing terminal isocyanate groups in which oleochemical polyols are present as the polyol component. The oleochemical polyols are ring opened products or partial ring-opened products of epoxidized fatty acid triglycerides with alcohols. The use of oleochemical polyols having a residual epoxide number of from 1.0 to 4.0% by weight of epoxide oxygen is preferred. The polyurethane prepolymers are particularly suitable for use in one-component or two-component polyurethane foam formulations.
Claims20
A starting material for polyurethane foam comprising:
- a polyurethane prepolymer containing terminal isocyanate groups comprising the reaction product of (1) a stoichiometric excess of an aromatic isocyanate containing an average of 2 to 4 isocyanate groups per molecule and (2) an oleochemical polyol obtained from the complete or partial ring opening of epoxidized triglycerides of a fatty acid mixture containing at least partly olefinically unsaturated fatty acids with a monohydric or polyhydric alcohol;
- and an effective amount of a blowing agent, said blowing agent being at least partially soluble in said polyurethane prepolymer.
A starting material for moisture-hardened one-component polyurethane foam, comprising
- (A) the reaction product of (1) a stoichiometric excess of an aromatic isocyanate containing an average of 2 to 4 isocyanate groups per molecule and (2) an oleochemical polyol obtained from the complete or partial ring opening of epoxidized triglycerides of a fatty acid mixture containing at least partly olefinically unsaturated fatty acids with a monohydric or polyhydric alcohol;
- and
- (B) effective amounts of (1) a blowing agent selected from the group consisting of chlorinated-fluorinated hydrocarbons, (2) a tertiary amine catalyst and (3) a phosphorus and/or halogen containing liquefying agents.
A process of making a polyurethane foam composition comprising:
- (a) producing an oleochemical polyol by the complete or partial ring opening of epoxidized triglycerides of a fatty acid mixture containing at least partly olefinically unsaturated fatty acids with a monohydric or polyhydric alcohol;
- (b) producing a polyurethane prepolymer by reacting said oleochemical polyol with a stoichiometric excess of an aromatic isocyanate containing an average of 2 to 4 isocyanate groups per molecule;
- (c) mixing with said polyurethane prepolymer effective amounts of (i) a blowing agents, said blowing agent being at least partially dissolved in said poylurethane;
- (ii) a liquefying agent;
- and (iii) a catalyst;
- (d) evaporating the blowing agent to form a foam;
- and
- (e) exposing said foam to water whereby a polyurethane foam is produced.
Dependencies are inferred from the claim text.