Welcome Guest to Coatings World    Login || Register
Last Updated Saturday, May 25 2013
Print

Aqueous Polymer Emulsion-Polyester



Description:
Air Products and Chemicals, Allentown, PA, has been awarded a U.S. patent covering a two component polyurethane-polyurea dispersion that is substantially solvent-free. It is prepared from (a) an aqueous mixture of an acid containing polymeric polyol and polyol free of acid groups, wherein the mixture has an average hydroxyl functionality of at least 1.5 and an acid number between 15-200; and an amine or a blend of amines having an average active hydrogen functionality of at least 1.5, the amine or blend being present in a sufficient amount to substantially neutralize the acid-containing polymeric polyol; (b) one or more polyisocyanates; and (c) two or more different pigments. The improvement for reducing or eliminating flooding of the pigments is comprised of (d) an aqueous polymer emulsion comprising a polymer prepared by aqueous emulsion free radical polymerization, the polymer emulsion present in an amount sufficient to impart thixotropy to a mix


Receive free Coatings World emails
Sign up now to receive the weekly newsletter, and more!

Enter your email address:
Company Spotlight
Micro Powders, Inc.
580 White Plains Rd.
Tarrytown, NY, 10591
US
View Profile
Sun Chemical Corporation Performance Pigments
5020 Spring Grove Avenue
Cincinnati, OH, 45232
USA
View Profile
Follow Coatings World On