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Coating composition and product containing coating formed by coating composition

A composition and coating technology, applied in the field of coated products, can solve the problems of low hardness of dry coating film, unable to meet application requirements, etc., and achieve the effect of improving hardness and scratch resistance

Pending Publication Date: 2022-03-04
GUANGDONG HUARUN PAINT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hardness of the dry coating film obtained by Michael addition curing technology at room temperature is often much lower than that of the traditional two-component polyurethane coating, which cannot meet the application requirements

Method used

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  • Coating composition and product containing coating formed by coating composition
  • Coating composition and product containing coating formed by coating composition
  • Coating composition and product containing coating formed by coating composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0125] Embodiment 1: the preparation of acetoacetate epoxy resin

[0126] At room temperature, 220.30 g of epoxy resin (NanYa, EEW: 471 g / mol) and 79.70 g of t-BAA were charged into a four-necked flask equipped with a thermometer, overhead stirrer, gas inlet and distillation apparatus. Supply N through the gas inlet 2 gas to provide N 2 Protect. The reaction mixture was then slowly heated to about 130°C and the distillate (tert-butanol) collected and maintained at this temperature until the distillation temperature did not exceed 78°C. Under these conditions (distillation temperature <= 78°C), the temperature of the mixture was raised to 160°C. When the temperature of the mixture reached 160°C, it was maintained until the distillation temperature was below 60°C. The mixture was then cooled to below 100°C and then mixed with n-butyl acetate (n-BA). The solids content is about 70%.

[0127] The resulting resin was characterized as a reactive donor.

[0128] The result s...

Embodiment 2

[0129] Embodiment 2: the preparation of coating composition

[0130] According to the components and dosage shown in Table 1, first prepare component A and component C respectively, and then mix the components. Wherein, the amine solution in component C of composition 2-13 refers to dissolving the amine compounds listed in Table 2 in a mixed solvent at 2% by weight.

[0131] Table 1

[0132]

[0133]

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PUM

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Abstract

The invention relates to a coating composition and a product comprising a coating formed by the coating composition. A coating composition described herein comprises (A) a reactive donor capable of providing two or more nucleophilic carbon anions, the reactive donor having an aromatic epoxy backbone, and the reactive donor having an epoxy equivalent weight in the range of 400 to 1100 g / mol; (B) a reactive receptor comprising two or more carbon-carbon double bond groups; (C) a catalyst for catalyzing a Michael addition cross-linking reaction between the reactive donor and the reactive acceptor; and (D) a hardness accelerator, wherein the hardness accelerator comprises a monoamine compound, a tertiary amine compound, a nitrogen-containing heterocyclic compound or a combination thereof. By employing the coating compositions described herein, the resulting coatings have excellent hardness, scratch resistance, or both.

Description

technical field [0001] The present invention relates to coating compositions. Specifically, the present invention relates to a coating composition capable of forming a dense paint film, and an article comprising a coating formed from the coating composition. Background technique [0002] Traditional solvent-borne two-component polyurethanes have been widely used in wood coating compositions due to their excellent overall properties, including drying speed, fullness, film hardness, etc. However, due to increasingly stringent environmental regulations, control standards for free isocyanates (such as toluene diisocyanate TDI) and volatile organic compounds (VOCs) in coating applications are becoming more stringent. Therefore, non-isocyanate (NICN) curing technology without any free isocyanate has received great attention in both academic and industrial fields. [0003] So far, there are several viable curing methods for NICN, such as polycarbodiimide (PCDI) curing, Michael ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D4/06C09D7/63
CPCC09D4/06C09D7/63C09D163/00C08G59/1455C08G59/686C08L71/00C08G59/1494C08G59/3218C08L63/00
Inventor 陈宏彬牛松
Owner GUANGDONG HUARUN PAINT CO LTD