Coatings World - November 2012

parting defoaming property to a baking finish type topcoat paint containing an acid anhydride curing agent, a melamine resin curing agent or a gly-cidyl-containing acrylic resin/acid anhydride curing agent for motor vehicles comprised of the step of adding a copolymer of 2%-50% by weight of a polymerizable monomer capable of forming a copolymer having isocyanate groups which can react with a binder resin in thermosetting paint or a polymerizable monomer capable of forming a copolymer having groups capable of producing isocyanate groups which can react with a binder resin in thermosetting paint during baking step of the same paint, and 98%-50% by weight other monomer or polymer reactable with the polymerizable monomer or to the topcoat paint.

Kansai paint patents water-
based primer
U.S. 8,173,744 B2

Kansai Paint Co. has been awarded a patent for a water-based primer composition comprised of an aqueous dispersion formed by dispersing an unsaturated carboxylic acid- or acid an-hydride-modified polyolefin having a melting point of 60°-110° C and a weight-average molecular weight within a range of 30,000-200,000, and unsaturated carboxylic acid- or acid anhy-dride-modified polyolefin having a melting point of 40°-90° C and a weight-average molecular weight within a range of 30,000-200,000, in an aqueous medium, the melting point of the modified polyolefin being higher than that of the modified polyolefin by at least 10° C; the composition further containing at least one resin selected from the group consisting of aqueous urethane resin, aqueous acrylic resin and aqueous polyester resin and the weight ratio of solid contents of the aqueous dispersion/resin being within a range of 20/80-80/20.

Valspar Sourcing patents coating composition for food or beverage can U.S. 8,173,265 B2 Valspar Sourcing, Inc. has been granted a parent for an article comprised of a body portion or end portion of a food or beverage can comprised of a metal substrate. The food or beverage can coating composition is disposed on an inside surface thereon comprised of an emulsion polymerized latex polymer that is substantially free of bound bisphenol A and aromatic glycidyl ether compounds and it is comprised of the reaction production of an ethylenically unsaturated monomer component batch polymerized in the presence of an aqueous dispersion of a polymer salt, wherein the ethylenically unsaturated monomer component is comprised of a mixture of monomers that includes at least one oxirane functional group-con-taining monomer. CW

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