Low voc amino baking enamel composition, preparation method and application thereof

The low-VOC amino baking paint effect pigment, prepared through specific components and processes, solves the problems of high VOC content and insufficient aluminum powder orientation effect, achieving high gloss and leveling properties that meet environmental protection standards, and is suitable for coating automobile bodies and wheels.

CN115960520BActive Publication Date: 2026-06-09NIPPON PAINT GUANGZHOU +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NIPPON PAINT GUANGZHOU
Filing Date
2021-05-31
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing amino baking paint compositions have high volatile organic compound (VOC) content, making it difficult to meet environmental regulations. Furthermore, the aluminum powder orientation effect and gloss are insufficient, making it impossible to use them simultaneously with liquid single-component varnishes and powder varnishes.

Method used

A low-VOC amino baking paint composition is prepared by using a specific ratio of aluminum paste, thermosetting acrylic resin, polyester resin, amino resin, end-capped isocyanate resin, cellulose acetate butyrate, microgel-acrylic resin polymer, and anti-settling wax through a precise stirring process. This ensures that the spraying viscosity and VOC content meet the standards and improves the orientation effect and gloss of aluminum powder.

Benefits of technology

The prepared low-VOC amino baking paint effect pigment paint has a spray solids content of 41%, a spray viscosity range of 19.5 ~ 21.5 seconds/20℃, and a VOC content ≤580g/L. It has good aluminum powder orientation effect, gloss and leveling properties, and can be used in conjunction with liquid single-component clear varnish and powder clear varnish. It is suitable for automotive body and wheel coating.

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Abstract

The application discloses a low-VOC amino baking paint effect pigment paint composition, which comprises, in percentage by weight, 4.5-7.5 % of aluminum paste, 12.0-16.0 % of thermosetting acrylic resin, 14.0-18.0 % of polyester resin, 8.0-12.0 % of amino resin, 1.0-3.0 % of blocked isocyanate resin, 0.3-0.8 % of cellulose acetate butyrate, 4.5-6.5 % of microgel-acrylic resin polymer, 0.9-1.3 % of anti-settling wax, 0.1-0.4 % of other additives and 38.0-44.0 % of solvent. The spraying body fraction of the effect pigment paint composition is greater than 41 %, the spraying viscosity range is 19.5-21.5 seconds / 20 DEG C * coating 4 cups, the VOC content under the spraying viscosity meets the requirements of GB / T38597-2020 'Low Volatile Organic Compound Content Coating Product Technical Requirements' - VOC content in solvent-based coatings - requirements of the VOC content in automobile original factory coatings (passenger cars) - basecoat - effect pigment paint - limit value (g / L) <580, and the effect pigment paint has good aluminum powder directional effect, gloss, flicker (FF value) and leveling property, and can meet the matching use with liquid single-component varnish and powder varnish at the same time. The application further discloses an effect pigment paint comprising the baking paint composition and a preparation method and application of the effect pigment paint.
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