Vegetable oil-modified, hydrophobic polyurethane dispersions
AssigneeRust-Oleum Corporation
InventorsWumin Yu, Zhigang Chen
Life of this patent
Estimating the term…
Abstract
Aqueous hydrophobic polyurethane dispersions are made from urethane prepolymers derived from reacting constituents including at least one polyisocyanate, vegetable oil based saturated monoglycerides, non-isocyanate based urethane polyols prepared from polyamines and cyclic carbonates, at least one long-chain polymeric polyol or long-chain polyol from biorenewable resources, polyols with hydrophilic groups, optional polydimethysiloxane based polyols with hydroxyl functional groups terminated in one end and alkyl groups terminated in another end.
Claims36
A vegetable oil modified polyurethane dispersion comprising a polyurethane prepolymer that is a reaction product of an admixture of:
- (A) from 5 to 60% by weight based on the amount by weight of all admixture monomers of at least one polyisocyanate;
- (B) from 5 to 40% by weight based upon the weight of the admixture monomers of at least one saturated monoglyceride (SMG) from a soybean oil;
- (C) at least one long-chain polymeric polyol;
- (D) from 5 to 15% by weight of the monomers in the admixture of at least one non-isocyanate based urethane polyol prepared from a polyamine and a cyclic carbonate;
- (E) optionally one polydimethylsiloxane polyol with hydroxyl functional groups;
- and
- (F) from 3 to 8% by weight, based on the amount by weight of all the monomers of at least one polyol with hydrophilic and/or ionic groups,
- wherein the vegetable oil modified polyurethane dispersion has an early water resistance score of 4 when dispersed in water.
Dependencies are inferred from the claim text.