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High-solid epoxy coating as well as preparation method and application thereof

An epoxy, high-solid technology, applied in the field of coatings, can solve problems such as viscosity or curing speed that is not suitable for automotive coating processes, and achieve the effects of meeting the requirements of spraying processes, low VOC content, and simple preparation methods

Active Publication Date: 2022-05-03
NANTONG XINGCHEN SYNTHETIC MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN201110351130.6 discloses a high-performance, high-solid general-purpose modified epoxy antirust coating and its preparation method. Group A is: E44 epoxy resin 10-20; NPPN-631 epoxy resin 10-20; terpene Resin 5-15; Indene resin 4-18; BYK defoamer 0.1-1.0; HX leveling agent 0.1-1.0; rheological additive 0.1-1.5; active silica 5-20; mixed solvent 10-20; Pigment and filler 10-30; B component: cardanol modified amine 10-40; modified silane coupling agent 0.5-3, the solid content of the coating can only reach more than 71%, but the viscosity exceeds 1000mpa s , and the hard drying time is less than 24h, neither the viscosity nor the curing speed is suitable for the automotive coating process

Method used

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  • High-solid epoxy coating as well as preparation method and application thereof
  • High-solid epoxy coating as well as preparation method and application thereof
  • High-solid epoxy coating as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0076] 1. 10.5 parts of propylene glycol methyl ether, 4.5 parts of butanol, 16 parts of solid bisphenol A epoxy resin 0191, 1.6 parts of Nantong Xingchen Synthetic Materials Co., Ltd. model is the monofunctional reactive diluent of 3630, 6.4 parts of Nantong Xingchen Synthetic Materials Co., Ltd. model is 3622 multifunctional reactive diluent, 1 part of bentonite, 0.5 part of BASF Performance Chemicals (Nanjing) Co., Ltd., and this type of polyurethane dispersant with model EFKA4010 is added to the batching container, heated to 90 ° C, and Stir at a high speed of 1200r / min for 3 minutes until the mixture is uniform, cool down to 60°C, then add 24 parts of liquid bisphenol A epoxy resin of model 0164 from Nantong Xingchen Synthetic Materials Co., Ltd., 10 parts of Shanghai Eve Industrial Co., Ltd. Co., Ltd. titanium dioxide, 40 parts from Shandong Yilite Chemical Co., Ltd., the specification is 500 mesh BaSO 4 , keep stirring at a high speed until the mixture is uniform, lower...

Embodiment 2

[0080] All the other are identical with embodiment 1, and difference is that curing accelerator is made of 1.5 parts of U.S. gas chemical products company, and model is K54 was compounded with 0.3 part of 2,3-bisphosphoglyceric acid purchased from Wuhan Boshikang Bioengineering Co., Ltd.

Embodiment 3

[0082] All the other are identical with embodiment 1, and difference is that curing accelerator is made of 1.125 parts of U.S. gas chemical products company, and model is K54 was compounded with 0.675 parts of 2,3-bisphosphoglyceric acid purchased from Wuhan Boshikang Bioengineering Co., Ltd.

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Abstract

The invention relates to a high-solid epoxy coating as well as a preparation method and application thereof. The high-solid epoxy coating comprises 20-50 parts of liquid epoxy resin; 5-20 parts of solid epoxy resin; 5-15 parts of a reactive diluent; 0-20 parts of an organic solvent; the component B comprises the following raw materials in parts by weight: 60-100 parts of a Manny base curing agent; 0-40 parts of a polyamide curing agent; 0.5 to 3 parts of a curing accelerator; the weight ratio of the component A to the component B is 100: (15-35), and the curing accelerator is a compound of phenols and organophosphate. The phenol and / or organophosphate are / is used as the curing accelerator, so that the curing speed is increased, the curing temperature is reduced, and the purpose of further shortening the hard drying time under the condition of high solid content is achieved. Organophosphate containing carboxyl or hydroxyl as a functional group plays a role of a cross-linking agent, so that the coating forms a more compact net-shaped structure, and the strength and toughness of a paint film are more excellent. And the use of organophosphorus ester can improve the water resistance of the paint film. The paint film prepared by the invention has good water resistance.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a high-solid epoxy coating, a preparation method and an application thereof, and belongs to the technical field of coatings. Background technique [0002] As humans pay more and more attention to the ecological environment, governments of various countries have imposed strict restrictions on the VOC content in coatings. Therefore, high solid content, solvent-free, powder, and water-based coatings can be developed rapidly. Especially in the coatings of modern automobiles and rail vehicles, in order to avoid major changes in the construction production line, high-solid coatings are one of the fastest-growing coatings. Due to its construction performance and required construction conditions of high-solid coatings are basically the same as those of solvent-based coatings, the original coating line can be used without major modification. Most of the high-solid coatings use epoxy resin, polye...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/02C08G59/68
CPCC09D163/00C08G59/68C08G59/688
Inventor 王岳峰金戈高晨夏亮
Owner NANTONG XINGCHEN SYNTHETIC MATERIAL
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