Patent · US Active

Aqueous polyurethane dispersions

US11066504B2 · kind B2 · utility

0Cited by

6References

13Claims

0Family size

Assignee

TAMINCO BV · BE

Inventors

Jeffrey Blaisdell · Seekonk, US
Michael Schmidt · Weiterstadt, DE
Michael D. Gernon · Phoenixville, US

Key dates

Filing date	Mar 16, 2020
Grant date	Jul 20, 2021
Priority date	—
Expiry date	Mar 16, 2040

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09D175/06
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

An aqueous polyurethane dispersion comprising at least one isocyanate terminated polyurethane prepolymer prepared by reacting in the presence of at least one pyrrolidone selected from the group consisting of N-n-butylpyrrolidone, N-isobutylpyrrolidone, N-sec-butylpyrrolidone and N-tert-butylpyrrolidone, a mixture (M) which comprises: at least one polyisocyanate compound (a), at least one polyol compound (b), having a molecular weight Mw of 200 to 8000 and a hydroxyl functionality of 1.5 to 6, and at least one water dispersible enhancing component having at least one hydrophilic group or potentially hydrophilic group in water.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.