A process for forming a coating composition, a coating composition, and an article comprising the same

A coating composition using a copolymerizable silicone polymer and monomer system with a surfactant and crosslinking agent addresses the environmental concerns of organic solvent-based coatings, achieving superior performance in gloss retention, hardness, and solvent resistance.

KR1020260113288APending Publication Date: 2026-07-21WACKER CHEMIE AG
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Patent Information

Authority / Receiving Office
KR · KR
Patent Type
Applications
Current Assignee / Owner
WACKER CHEMIE AG
Filing Date
2024-12-19
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing coatings formed with organic solvents exhibit superior performance in curing time, chemical resistance, mechanical properties, and weather resistance compared to aqueous coatings, but they pose environmental and safety concerns due to volatile organic carbon content.

Method used

A coating composition is developed using a copolymerizable composition comprising ethylenically functionalized silicone polymer, ethylenically unsaturated monomer, and copolymerizable organic compound, polymerized in the presence of a surfactant, with a crosslinking agent, to form an aqueous dispersion that achieves high glass transition temperature and crosslinking, resulting in a coating with enhanced properties.

Benefits of technology

The coating composition demonstrates improved gloss retention, pendulum hardness, solvent resistance, and image sharpness, with a gloss value of at least 50, after 3000 hours of curing, while being environmentally friendly by reducing volatile organic carbon content.

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Abstract

A process for forming a coating composition comprises the step of providing a composition copolymerizable in water. The copolymerizable composition comprises at least 20 weight% of an ethylenically functionalized silicone polymer and at least 5 weight% of an ethylenically unsaturated monomer. A surfactant is provided in an amount of 0.1 weight% to 10 weight%. A copolymerizable organic compound is provided in an amount of 5 weight% to 50 weight%. The copolymerizable organic compound has an ethylenically unsaturated radical and at least one additional functional group. The polymer, monomer, and copolymerizable organic compound are polymerized in the presence of a surfactant to form an aqueous dispersion of the copolymer. The copolymer comprises at least one additional functional group that is not polymerized during polymerization, and the copolymer also exhibits a glass transition temperature (Tg) of at least 0 °C. A crosslinking agent is mixed with the aqueous dispersion of the copolymer. The crosslinking agent is provided in an amount of at least 10 weight%.
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