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A latent self-curing resin coating composition and its construction method

A resin coating and self-curing technology, which is applied in epoxy resin coatings, coatings, devices for coating liquid on the surface, etc., can solve problems such as inconvenient use, and achieve the effect of both hardness and flexibility

Active Publication Date: 2022-02-01
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defects that existing latent self-curing epoxy resin coatings are limited to solid latent curing agents such as dicyandiamide, DDS, and aluminum acetylacetonate, and are inconvenient to use, the present invention discloses a liquid anhydride-based modified acrylic acid that is easy to use The preparation method of ester resin (CAPA) polymer latent resin curing agent and the preparation method of latent self-curing resin coating and coating developed based on CAPA, epoxy resin, epoxy-based POSS, epoxy active diluent, etc.

Method used

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  • A latent self-curing resin coating composition and its construction method
  • A latent self-curing resin coating composition and its construction method
  • A latent self-curing resin coating composition and its construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Take about 100g of epoxy resin E-51 (containing about 0.51mol of epoxy groups) with an epoxy equivalent of about 0.51 and a viscosity of about 11000mPa.s, and then weigh 3.0g (about 3%) according to the mass parts of E-51 The structure is as shown in the formula (1a): cage octa(2,3-glycidoxypropyl) POSS, 10.0g (about 10%) butyl glycidyl ether, 1.0g (about 1%) BYK-ATU dispersion Agent, 200.0g (about 200%) nano-silica sol (containing 60.0g of nanoparticles) with a solid content of 30% and an average particle diameter of about 20nm, after stirring and mixing, use a rotating speed of 1000r / min to stir and disperse for 30min with a dispersing disc, and then According to the molar ratio of the epoxy group contained in the system to the anhydride group + carboxyl group contained in the curing agent CAPA as 1:1, weigh 440.1g of carboxyl group with a solid content of 60% and an anhydride group content of about 0.223%. The content of butyl acrylate-co-styrene-co-methylene succini...

Embodiment 2

[0031] Take about 166.67g of epoxy resin E-20 solution with an epoxy equivalent of about 0.20 and a solid content of 60% (containing about 0.2mol of epoxy groups and 100g of solid resin, Baotashan Paint Co., Ltd.), press E-20 The solid mass parts are then weighed in turn 5.0g (about 5%), the structure is shown in the formula (1a) cage octa(3,4-epoxycyclohexylethyl) POSS, and the 20.0g structure is shown in the formula (2a) Cage mono(2,3-glycidoxypropyl) heptaisobutyl POSS, 20.0g (about 20%) C 12-14 Alkyl glycidyl ether AGE (Mw769.27), 0.5g (about 0.5%) of BYK-ATU dispersant, 50.0g (about 50%) of nano-silica sol with a solid content of 30% and an average particle size of about 20nm (Containing 15.0g of nanoparticles), after stirring and mixing, stir and disperse for 30min with a dispersing disc with a rotating speed of 1000r / min, and then compare the total amount of epoxy groups contained in the system with the (anhydride group + carboxyl group) contained in the curing agent CA...

Embodiment 3

[0034] Take about 100.0g of epoxy resin E-44 (containing about 0.44mol of epoxy groups) with an epoxy equivalent of about 0.44 and a viscosity of about 20000mPa.s, and weigh 10.0g (about 10 %), structure as shown in formula (4a), semi-closed cage tris(2,3-glycidoxypropyldimethylsilyl) heptaisobutyl POSS, 15.0g (about 15%) neopentyl di Alcohol diglycidyl ether reactive diluent, 0.8g (about 0.8%) BYK-ATU dispersant, 100.0g (about 100%) nano-silica sol with a solid content of 30% and an average particle size of about 20nm (containing nanoparticles 30.0g), after stirring and mixing, use a dispersing disc with a rotating speed of 1000r / min to stir and disperse for 30min, and then press the molar ratio of the total amount of epoxy groups contained in the system to the total amount of (anhydride groups + carboxyl groups) contained in the CAPA resin Then weigh 406.55g of butyl acrylate-co-cyclohexyl methacrylate-co-phenyl with a solid content of 70%, an anhydride group content of abou...

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Abstract

A kind of latent self-curing resin coating and coating based on epoxy resin and high molecular anhydride base acrylate resin, consisting of epoxy resin E and 3-25% epoxy-based POSS by mass parts of epoxy resin, 10-20% epoxy reactive diluent, 0.5-1% dispersant, 50-200% nano-silica sol and latent polymer anhydride-based modified acrylate resin curing agent CAPA, and the latent high The amount of molecular anhydride group-modified acrylate resin curing agent CAPA is controlled as the mole number of epoxy groups contained in the system: the mole number of (anhydride group + carboxyl group) contained in CAPA is about 1:0.8‑1. The latent self-curing resin coating of the present invention is coated on the surface of the substrate, and the self-curing of the coating can be realized only by heating, and the coating is due to the existence of POSS and silica sol in the system and the polyacrylate chain in the curing component. The introduction of the segment also improves the hardness and flexibility of the epoxy coating.

Description

technical field [0001] The invention belongs to the field of resin coatings, in particular to a method for preparing latent self-curing resin coatings and transparent coatings constructed on the basis of epoxy resins, carboxylated / anhydride-based modified acrylate resins and epoxy-based POSS. Background technique [0002] Epoxy resin coating, good adhesion, strong adhesion, excellent chemical corrosion resistance and good electrical insulation, so it is used in chemical anti-corrosion and bonding, cable moisture-proof and circuit board packaging, electronic and electrical components potting and insulation, etc. There are wide applications. However, if the inorganic-organic nano-hybrid components are continuously introduced into the epoxy resin coating, the hardness of the coating can be increased while maintaining the original performance characteristics of the epoxy resin coating (covering coating defects, giving the coating Layer aesthetics and decorative effect), improvi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/02C09D163/04C09D7/61C08G59/42B05D3/02B05D1/02B05D7/14B05D7/24C08F220/18C08F212/08C08F222/04C08F220/64C08F216/16C08F222/06C08F220/06
CPCC09D163/00C09D163/04C09D7/61C08F220/1804C08G59/4238B05D7/24B05D1/02B05D3/0254B05D7/14C08K2201/011C08K3/36C08F212/08C08F222/04C08F220/64C08F220/1806C08F216/165C08F222/06C08F220/06C08F220/1818
Inventor 安秋凤杨博文金晶史书源焦岚姣薛朝华黄良仙
Owner SHAANXI UNIV OF SCI & TECH
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