| US 7,544,413 B2 | ||
| Coatings and coating systems having optimized chip performance and methods of obtaining the same | ||
| Timothy S. December, 546 Parkland, Rochester Hills, Mich. 48307 (US); Marc Bennett Fenwick, 2188 Shire Ct., Commerce Township, Mich. 48382 (US); Yoshiko Kobayashi-San, 2843 Mystic Dr., Ann Arbor, Mich. 48103 (US); Scott Kubish, 545 Hobart Ct., Saline, Mich. 48176 (US); JoAnn Lanza, 30935 Crest Forest, Farmington Hills, Mich. 48331 (US); and Ippei Shinohara, 44229 Winthrop Dr., Novi, Mich. 48375 (US) | ||
| Filed on Apr. 14, 2005, as Appl. No. 11/106,285. | ||
| Prior Publication US 2006/0234036 A1, Oct. 19, 2006 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. B32B 27/20 (2006.01); C08K 3/22 (2006.01) | ||
| U.S. Cl. 428—328 [428/409; 428/411.1; 428/423.1; 428/480; 524/497; 427/402; 427/407.1; 427/419.5] | 19 Claims |
| 1. A film-forming composition, comprising:
a film-forming binder comprising at least one of an acrylic polymer, a modified acrylic polymer, a polyurethane polymer, a
polyester prepared by the polyesterification of organic polycarboxylic acids or their anhydrides with organic polyols comprising
primary or secondary hydroxyl groups, a polyester polyurethane polymer, or a combination thereof; and
a pigment mixture, said pigment mixture present in a pigment to binder ratio of 0.8 to 0.99, and consisting of:
(i) at least 80% of titanium dioxide by weight, based on the total weight of the pigment mixture; and
(ii) no more than 20% by weight of non-titanium dioxide pigments based on the total weight of the pigment mixture, said non-titanium
dioxide pigments being selected from the group consisting of carbon black, talc, barium sulfate, magnesium silicate, and combinations
comprising two or more of the foregoing; wherein the film-forming composition has an adjusted VOC of no more than 100 g/L,
is free of all pigments other than those in the pigment mixture, has a viscosity of no more than 200 cps at 384 sec−1, and when cured for 25 minutes at 150C. provides a cured film having an elasticity of at least 20% at a dry film build of
from 0.8 to 2.0 mil on cold rolled steel.
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