C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
400/5501
C09D 175/04 (2006.01)
Patent
CA 1336631
A two component polyurethane coating consisting of a principal component (A) comprising a hydroxyl group containing film-forming resin, crosslinked polymer particles and a solvent for said film-forming resin and a hardener component (B) comprising a polyisocyanate compound, which is characterized by using as the crosslinked polymer particles the composite resin particles each comprising a particulate crosslinked polymer core and a number of substantially linear polymer chains coupled with said core in either way of chemical bonding, semi-interpenetration or both of them and containing metal element in either portion of said core, said polymer chains or both of them, the solid weight ratio of said hydroxyl group containing film-forming resin to said composite resin particles being 99/1 to 40/60 and the equivalent ratio of isocyanate gruops in the hardener component (B) to hydroxyl groups in the principal component (A) (if the linear polymer chains contain hydroxyl groups, the sum of said hydroxyl groups and those of the film- forming resin) being 0.5 to 2Ø The coating composition is excellent in dispersion stability, application characteristics and drying fastness and capable of resulting an excellent coat.
539464
Kashihara Akio
Maekawa Toshihiro
Miyazono Tadafumi
Numata Syuhei
Ohiwa Masanori
Marks & Clerk
Nippon Paint Co. Ltd.
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