Welcome Guest to Coatings World    Login || Register
Last Updated Wednesday, October 7 2015


Published January 11, 2010
Patent No. U.S. 7,479,525 B2
E.I. Du Pont De Nemours and Company has been granted a patent for an isocyanate adduct useful as an isocyanate crosslinking agent in solventborne coating compositions, wherein the isocyanate adduct is a product obtained by the reaction of a gelled acrylic polymer with an excess of polyisocyanate compounds. The gelled acrylic polymer is dispersed in an organic liquid carrier, and consists essentially of a crosslinked core comprised of polymerized ethylenically unsaturated monomers, wherein the core is not soluble in the organic liquid carrier, and linear stabilizer polymeric components chemically grafted to the core, wherein the linear stabilizer components have weight average molecular weights in the range of 500-20,000 as determined by GPC (gel permeation chromatography) using polystyrene as standard, wherein the stabilizer components comprise polymerized ethylenically unsaturated monomers; the stabilizer components are soluble in the organic liquid carrier; the core, the stabilizer polymeric components or both contain isocyanate-reactive hydroxy and/or secondary amine functional groups attached thereto; and the excess of polyisocyanate compounds are present in an amount so that the ratio of NCO to OH/NH groups ranges from 5:1 to 50:1.

blog comments powered by Disqus

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

Enter your email address:
Company Spotlight
Siltech Corporation
225 Wicksteed Avenue
Toronto, ON, M4H 1G5
View Profile
18F, No.85, Sec. 1, Chung-Shiao E. Rd.
Taipei, Taiwan, 100
View Profile
Micro Powders, Inc.
580 White Plains Rd.
Tarrytown, NY, 10591
View Profile
Houchi Chemical Co., Ltd
No.56, Fu Chow Street
Taipei, Taipei, 100
View Profile
BASF Corporation
100 Campus Drive
Florham Park, NJ, 07932
View Profile
Sunin Machine Co., Ltd.
No.96, Chiao Ho Rd ,Chungho Dist
New Taipei City, Taiwan , 235
Taiwan Roc
View Profile
AZ Electronic Materials Co., Ltd.
No. 458-6, Sinsing Road Hu Kou Township Hsinchu Country 303, Taiwan
Hsinchu Country, Taiwan, 303
View Profile
Follow Coatings World On