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Coating compositions and methods

A composition and coating technology, applied in the direction of polyester coatings, coatings, etc., can solve the problems of limited corrosion resistance and chemical properties, limited flexibility, lack of durability, etc.

Inactive Publication Date: 2012-06-27
VALSPAR SOURCING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such combinations often have several drawbacks, including lack of durability, limited flexibility as hardness increases, and limited corrosion and chemical resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0127] Prepare top coat

[0128] A. Preparation of the first part of the two-part topcoat system (ie, component A)

[0129] A portion of the epoxy-modified ester (eg, 12.87 lbs), solvent (6.54 lbs), and dispersant (3.24 lbs) were added to the vessel. The composition was mixed for 5 minutes using a Cowles high speed dispenser at a rate of 700-1400 revolutions per minute (RPM). To this mixture was added pigment (27.33 lbs) and UV light stabilizer (0.50 lbs) with stirring.

[0130] The mill base was dispersed using a Cowles high speed distributor at a rate of 1400-1800 RPM for 30 minutes. The resulting millbase has a viscosity of typically 70-90 Kreb units (ku) at 120-130°F. The mill base was then ground to a Hegman fineness of 7.0+ using a horizontal mill.

[0131] To the millbase was added the remainder of the epoxy-modified ester (17.24 lbs), epoxy-functionalized acrylic (14.2 lbs), solvent (17.78 lbs. ) and flow aid (0.3 lbs).

[0132] The mixture was mixed for 20 minut...

Embodiment 2

[0140] Embodiment 2 prepares primer

[0141] A. The first part of the two-part primer system (ie, component A)

[0142] Epoxy-modified ester (12.77 lbs), solvent (4.47 lbs) and dispersant (1.06 lbs) were charged to a container. The composition was mixed for 5 minutes using a Cowles high speed dispenser at a rate of 700-1400 revolutions per minute (RPM). To this mixture was added solvent (0.75 lbs), pigment (21.28 lbs), two different dispersants (0.93 lbs total), two different rheology modifiers (1.59 lbs total), matting agent (5.85 lbs) and two different corrosion inhibitors (13.34 lbs total).

[0143] The millbase was dispersed using a Cowles high speed distributor at 1400-1800 RPM for 30 minutes. The resulting millbase has a viscosity of typically 80-110 Kreb units (ku) at 120-130°F. The millbase was then ground to a Hegmans size of 6 using a horizontal mill.

[0144] To this mill base was added phenolic polyglycidyl ether resin (5.35 lbs), solvent (10.02 lbs) and smoot...

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Abstract

The present invention provides coating compositions that include an epoxy-modified fatty acid ester resin, an oxirane-functional resin different from the epoxy-modified fatty acid ester resin, a carboxyl functional polyester resin, and an alkyl acid phosphate.

Description

technical field [0001] The present invention relates to a coating composition suitable for use as a topcoat or primer on a variety of substrates, including wood, cement, ceramic tile, metal, Plastic, glass, fiber optics and fiberglass. Background technique [0002] Many known coating compositions suffer from poor performance in one or more areas, such as durability, gloss retention, drying, hardness, solvent and moisture resistance, and the like. For example, two-component polyester epoxy resin systems have been developed and marketed that contain epoxy-modified fatty acid ester resins and carboxy-terminated polyesters. However, such combinations often have several drawbacks, including lack of durability, limited flexibility as hardness increases, and limited corrosion and chemical resistance. [0003] Accordingly, there is an urgent need in the coatings industry for compositions with improved durability, flexibility and chemical resistance. Summary of the invention [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D167/00C08G59/00C08G59/68C08L63/00
CPCC08L33/068C09D167/00C08G59/3218C08K5/521C08L63/00C08G59/688C08L2666/22C08L2666/02
Inventor D·克诺斯
Owner VALSPAR SOURCING INC