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US 12,600,812 B2Granted
Dispersants made from isocyanates and amines
AssigneeHuntsman Petrochemical Corporation
InventorsRobert Allison Grigsby, Jr., Xiaohua Fang, Donald Hugh Champion
Life of this patent
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Abstract
The present disclosure generally relates to a dispersant obtained from the reaction of a liquid isocyanate compound and a polyoxyalkylene amine and its use in dispersing various particulate solids in an aqueous or organic medium.
Claims15
A dispersant substantially free of biuret groups obtained from the reaction of:
- (i) a liquid isocyanate compound substantially free of an isocyanate prepolymer, wherein the liquid isocyanate compound is a polyisocyanate compound comprising a functional group selected from the group consisting of, an iminooxadiazine, a uretdione, an allophant and combinations thereof;
- and (ii) a polyoxyalkylene monoamine wherein the ratio of the number of amino groups from the polyoxyalkylene monoamine to the number of isocyanate groups from the liquid isocyanate compound is within the range of 0.95 to 1.2.
Dependencies are inferred from the claim text.