E.i. Dupont De Nemours and Company

Douglas Matt Lamb

Christopher Scopazzi

Laura Ann Lewin

Robert John Barsotti

John A Simms

Richard D Anderson

The present invention is directed to a multiple component coating composition comprising (a) a film forming binder component having isocyanate reactive groups; (b) a stable polyisocyanate solution comprising organic liquid and up to 30% by weight, based on the weight of the polyisocyanate solution, of a polyisocyanate having reactive isocyanate groups selected from an aromatic polyisocyanate having tertiary isocyanate groups or a (meth)acrylic polymer containing reactive isocyanate groups; and (c) optionally, a tinting composition comprising pigment, a dispersing agent and an organic liquid carrier; whereby components (a), (b) and (c) are blended together before application to a substrate and after application to a substrate the composition is cured to form a finish. The present invention is also directed to a method of producing a finish on a substrate and to the resulting coated substrate.

Multiple component coating composition utilizing dilution stable polyisocyanates

This invention provides for a two-pack solvent based coating composition that cures in two stages when applied over substrates. The first stage of the cure takes place rapidly under ambient conditions to produce a coating surface that can be readily sanded or buffed. Thereafter, over a period of days a second stage cure takes place to produce a coating having excellent coating properties. Thus, a coated component, such as automotive body, can be speedily moved out from a spray booth without affecting the surface quality of the coated surface. As a result, coating operation productivity can be increased. The aforedescribed dual cure properties of the coating composition result from including in a binder component of the coating composition an acrylic polymer having secondary amine and hydroxyl functionalities. The composition is most suited for use in automotive refinish applications.

Two-stage cure coating compositions

A coating composition primarily used as a clear coat of a clearcoat/color coat automotive finish; the composition has a film forming binder solids content of about 30-70% by weight contains about

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Landsale, PA, United States of America

Douglas Matt Lamb