C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 175/04 (2006.01) B05D 7/00 (2006.01) C08G 18/12 (2006.01) C08G 18/42 (2006.01) C08G 18/72 (2006.01) C08G 18/79 (2006.01) C08G 18/80 (2006.01) C25D 13/06 (2006.01)
Patent
CA 2140695
A chipping-resistant paint composition is disclosed, which comprises as major components (A) a blocked polyisocyanate obtained by mixing (i) an aliphatic or alicyclic polyisocyanate (a) and a cyclic trimerized polyisocyanate polymer (b) obtained from said polyisocyanate (a) with (ii) two or more kinds of polycaprolactone-modified polyols (c) having different number-average molecular weights, reacting ingredient (i) with ingredient (ii) by means of a urethane-forming reaction to yield a modified polyisocyanate compound (d) having a ratio of the molar concentration of isocyanurate groups to that of urethane groups of from 5/5 to 1/9, and blocking the residual active isocyanate groups of the modified polyisocyanate compound, said blocked polyisocyanate having a content of effective isocyanate groups of from 1 to 10 parts by weight per 100 parts by weight of the blocked polyisocyanate compound on a solid basis, and (B) at least one hydroxyl group-containing resin (e) having two or more hydroxyl groups per molecule; and further a method for forming a chipping-resistant multilayered film which comprises applying the chipping- resistant paint composition on an automotive body is disclosed.
Kawaguchi Tadayuki
Kida Masuo
Mashima Hiroshi
Ozaki Makoto
Suizu Shunji
Nippon Paint Co. Ltd.
Riches Mckenzie & Herbert Llp
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