Blending coat for paint and method of application

Abstract

The present disclosure reveals a blending coat to be applied prior to painting a surface to improve the adhesion of a paint to the surface, improve blending of colors, keeping the surface wet which prevents shadowing or the production of a halo, and with regard to metallic paint, allows the metallic paint to lay down so that the metallic paint is even and not blotchy. The present disclosure also reveals a method of application of the blending coat.

Claims

1. A blending coat consisting of: 1.0-20.0 weight percent of at least one polyester resin; 1.0-20.0 weight percent of at least one acrylic resin; 1.0-10.0 weight percent of cellulose; 1.0-20.0 weight percent of formaldehyde; 1.0-30.0 weight percent of at least one polyurethane; and 1.0-95.0 weight percent of at least one urethane reducer.

2. The blending coat of claim 1 wherein the at least one polyester resin is present in an amount between 5.0 and 15.0 weight percent.

3. The blending coat of claim 2 wherein the at least one acrylic resin is present in an amount between 3.0 and 15.0 weight percent.

4. The blending coat of claim 3 wherein the formaldehyde is present in an amount between 10.0 and 20.0 weight percent.

5. The blending coat of claim 2 wherein the formaldehyde is present in an amount between 10.0 and 20.0 weight percent.

6. The blending coat of claim 1 wherein the formaldehyde is present in an amount between 10.0 and 20.0 weight percent.

7. The blending coat of claim 1 wherein the at least one acrylic resin is present in an amount between 3.0 and 15.0 weight percent.

8. The blending coat of claim 7 wherein the formaldehyde is present in an amount between 10.0 and 20.0 weight percent.

9. A method of application of a blending coat to a surface, wherein said blending coat consists of: 1.0-20.0 weight percent of at least one polyester resin; 1.0-20.0 weight percent of at least one acrylic resin; 1.0-10.0 weight percent of cellulose; 1.0-20.0 weight percent of formaldehyde; 1.0-30.0 weight percent of at least one polyurethane; and 1.0-95.0 weight percent of at least one urethane reducer; wherein the surface is treated with the blending coat by at least one of brushing, spraying, dipping, pouring or rolling; and within 15 minutes after the treatment of the blending coat to the surface, applying a paint to the surface.

10. The method of application of the blending coat of claim 9 wherein the at least one polyester resin is present in an amount between 5.0 and 15.0 weight percent.

11. The method of application of the blending coat of claim 10 wherein the at least one acrylic resin is present in an amount between 3.0 and 15.0 weight percent.

12. The method of application of the blending coat of claim 11 wherein the formaldehyde is present in an amount between 10.0 and 20.0 weight percent.

13. The method of application of the blending coat of claim 10 wherein the formaldehyde is present in an amount between 10.0 and 20.0 weight percent.

14. The method of application of the blending coat of claim 9 wherein the formaldehyde is present in an amount between 10.0 and 20.0 weight percent.

15. The method of application of the blending coat of claim 9 wherein the at least one acrylic resin is present in an amount between 3.0 and 15.0 weight percent.

16. The method of application of the blending coat of claim 15 wherein the formaldehyde is present in an amount between 10.0 and 20.0 weight percent.

Description

DETAILED DESCRIPTION OF THE INVENTION

(1) The present disclosure reveals a composition for a blending coat that is applied prior to the painting of a surface to treat the surface in order to improve the adhesion of a paint to a surface, improve the blending of colors, keep the surface wet which prevents shadowing or the creation of a halo, and with regard to metallic paint, allows the metallic paint to lay down so that the metallic paint is even and not blotchy. This composition consists of at least one polyester resin, at least one acrylic resin, cellulose, formaldehyde, at least one polyurethane, and at least one urethane reducer. The present disclosure also reveals a method of application of the blending coat.

(2) The polyester resins are unsaturated synthetic resins formed by the reaction of dibasic organic acids and polyhydric alcohols. In particular, dibasic acids and their esterifiable derivatives (such as their anhydrides) with polyhydric alcohols.

(3) The acrylic resins are made from alkyl acrylates and methacrylates as homo- and co-polymers, sometimes combined with other thermoplastic monomers. A preferred acrylic resin is a thermoplastic acrylic resin comprising methyl methacrylate and butyl acrylate and available under the trademark PARALOID from Kemco International Associates of St. Petersburg, Fla. Examples of acrylic resins that may be used in the composition of this invention are addition products of polyepoxides and unsaturated carboxylic acids, preferably acrylic acid and methacrylic acid. Suitable polyepoxides are epoxy novolac resing and, in particular, polyepoxides based on bisphenol A. Another suitable class of vinyl ester resins is the esterification products of alkoxylated bisphenol A and (meth) acrylic acid. Additionally, the modified acrylic resin can be a chlorinated acrylic resin which nay be modified by an acrylate monomer, such as methyl acrylate, ethyl acrylate, methyl methacrylate and methacrylate.

(4) The cellulose is an organic compound with the formula (C.sub.6H.sub.10O.sub.5).sub.n, a polysaccharide consisting of a linear chain of several hundred to many thousands of β(1.fwdarw.4) linked D-glucose units. The polyurethane is formed by reacting a polyol (an alcohol with more than two reactive hydroxyl groups per molecule) with a diisocyanate or a polymeric isocyanate in the presence of suitable catalysts and additives.

(5) The blending coat consists of the following ingredients based on weight percentage:

(6) TABLE-US-00001 Ingredient Amount (Weight Percentage) at Least one Polyester Resin 1.0-20.0 at least one acrylic resin 1.0-20.0 cellulose 1.0-10.0 formaldehyde 1.0-20.0 at least one polyurethane 1.0-30.0 at least one urethane reducer 1.0-40.0

(7) Any deficiency in percentage would result in the inclusion of additional urethane reducer.

(8) The method of application consists of treating a surface with two coats of the blending coat, wherein the surface is treated with the blending coat by at least one of brushing, spraying, dipping, pouring, or rolling, followed by either the immediate application of the color coat or waiting up to 15 minutes before application of a paint. The blending coat will cure with the curing of the paint, is colorless and has good adhesion properties and covers evenly.