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Normal-temperature curing type high-hardness coating

A room temperature curing, high hardness technology, applied in the field of coating agents and coatings, can solve the problems of difficulty in forming uniform, moldy, chalking, good gloss, etc.

Active Publication Date: 2018-03-27
沙河市湡久新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, special construction equipment is required for powder coating construction, and there is a problem that it is difficult to form a uniform, smooth and glossy coating
Compared with coatings containing organic solvents, water-based coatings have disadvantages such as poor water resistance, solvent resistance and weather resistance, and must use waste liquid treatment equipment.
However, the weather resistance of the coating film formed by solvent-free epoxy resin coating is poor, and deterioration phenomena such as mildew and powdering will occur in a short period of time (3 to 6 months) when used outdoors.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～15 and comparative example 1～3

[0072] A paint composition was prepared by mixing the following resin (A), a siloxane oligomer as a reactive diluent (B), and a catalyst (C) in the composition shown in Table 1. Proportions are expressed by weight. On a 0.6mm thick degreased mild steel plate (5cm*15cm) as a base material, it is coated by a bar, and dried at room temperature 25°C for 24 hours to solidify to form a dry film with a thickness of 20μm. The properties of the obtained coating films were measured by the following methods, and the results are shown in Table 1. Commercially available acrylic urethane paint, acrylic melamine paint, and polyester melamine paint were used as comparative examples.

[0073] Resin (A)

[0074] (1) Hydroxyl Fluorine Resin (A-1)

[0075] Cefral coat A-100 [manufactured by Central Glass Co., Ltd. (Central Glass Co., Ltd.)]

[0076] (Molecular weight (Mn): 3800, hydroxyl value: 50mg KOH / g)

[0077] (2) Hydroxyl-containing acrylic resin (A-2)

[0078] Alotan UW2817 [manufact...

Embodiment 16～21

[0114] Manufacture the same coating composition as the above-mentioned embodiment according to the proportioning in Table 2, and measure the performance of the coating film. The results are shown in Table 2 below.

[0115] 【Table 2】

[0116] Form 2

[0117]

[0118] Examples 16-21 of the present invention have excellent coating properties.

Embodiment 22

[0120] γ-glycidyl propyl trimethoxysilane is used as reactive diluent (B) instead of siloxane oligomer; BF3 complex is used as catalyst (C) instead of boron trifluoride monoethylamine, For the rest, the steps of Examples 16-21 were repeated to manufacture a coating composition. The performance of the coating film of the obtained coating composition of the present invention was good.

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Abstract

The invention provides a normal-temperature curing type high-hardness coating. The normal-temperature curing type high-hardness coating is prepared from more than one of fluorine resin, acrylic resin,polyester resin and melamine resin which are provided with functional groups and are solid or in fixed forms at normal temperature, and a reactive diluent which is non-volatile liquid and has solubility to the resin at normal temperature. Thus, the resin which is provided with a functional group and is solid or in a fixed form at normal temperature is dissolved or suspended in the non-volatile reactive diluent which has solubility to the resin and is provided with a functional group, the obtained solventless coating composition is coated on a substrate, then normal-temperature curing treatment or high-temperature treatment is performed, and the resin is cross-linked with the reactive diluent to form a coating with excellent hardness, weather resistance, flexibility, chemical resistance and post-processing performance, thereby obtaining the solventless coating provided by the invention.

Description

technical field [0001] The invention relates to the technical field of coatings and coating agents, in particular to a room temperature curing high-hardness coating with excellent outdoor weather resistance, chemical resistance and post-processing property. The composition is used as a coating and coating agent in The surface of inorganic substances (iron plate, tin plate, galvanized iron plate, aluminum plate, galvanized steel plate, glass, tile, slate) and organic matter (wood, paper, cellophane, plastic, organic coating film). Especially used in home appliances, construction and civil engineering (buildings, houses, curtain walls, reservoirs, factories, marine structures, bridges, etc.), transportation vehicles (automobiles, trains, airplanes, etc.), etc. Background technique [0002] Currently, as representative paints, for example, acrylic resin paints, polyester resin paints, fluororesin paints, and melamine resin paints are widely known. Most of these coatings contai...

Claims

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Application Information

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IPC IPC(8): C09D201/06C09D201/04C09D133/00C09D163/00C09D7/63
CPCC08K5/549C09D133/00C09D163/00C09D201/04C09D201/06
Inventor 饭田繁树
Owner 沙河市湡久新材料有限公司
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