US 7,507,779 B2
	Paint compositions
Toshiaki Nagano, Yokohama (Japan); Terutaka Takahashi, Hiratsuka (Japan); and Hideo Sugai, Hiratsuka (Japan)
Assigned to Kansai Paint Co., Ltd., Amagasaki-Shi (Japan)
Filed on Sep. 06, 2005, as Appl. No. 11/218,510.
Claims priority of application No. 2004-256981 (JP), filed on Sep. 03, 2004.
Prior Publication US 2006/0052493 A1, Mar. 09, 2006
Int. Cl. C08L 23/00 (2006.01); C08L 75/04 (2006.01); C08L 26/26 (2006.01)

U.S. Cl. 525—455  [525/454; 525/453; 525/452; 525/416; 525/185; 524/236; 524/99; 524/106; 524/154]

13 Claims

1. A water-based paint composition comprising a polyolefin or modified polyolefin (A) and an ionic liquid (B), said modified polyolefin being selected from the group consisting of unsaturated carboxylic acid- or acid anhydride-modified polyolefins, acryl-modified polyolefins, chlorinated polyolefins and polyolefins modified by a combination of at least two of unsaturated carboxylic acid- or acid anhydride-modification, acryl-modification and chlorination; the polyolefin or modified polyolefin (A) having a ratio of weight-average molecular weight to number-average molecular weight (Mw/Mn) within a range of 1.5-7.0; the ionic liquid (B) being a molten salt; said composition further containing a hydroxyl containing resin (C) having a hydroxyl value within a range of 5-200 mgKOH/g within a range, in terms of weight ratio of solid component of polyolefin or modified polyolefin (A)/hydroxyl-containing resin (C), of 20/80-85/15, and a crosslinking agent (D); said composition also further containing as a vehicle component a urethane dispersion in the range of 5-50 wt % based on the combined solid contents of polyolefin or modified polyolefin (A), hydroxyl-containing resin (C) and crosslinking agent (D).