A kind of anhydride-based modified acrylate resin curing agent, preparation method and application

An acrylate and resin curing technology, used in epoxy resin coatings, coatings, etc., can solve problems such as inconvenience in use, and achieve the effects of expanding the scope of application, improving impact resistance, and improving mutual solubility and reactivity

Active Publication Date: 2022-03-01
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the defect of inconvenient use of the two-component epoxy resin coating system, the present invention discloses a preparation method of a latent anhydride-based modified acrylate resin curing agent and the use of the resin in latent self-curing epoxy resin coatings and coatings. application method

Method used

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  • A kind of anhydride-based modified acrylate resin curing agent, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Weigh 50.0g of butyl acrylate, 35.0g of styrene, 10.0g of 2-methylene succinic anhydride, 5.0g of docosanoic acid in order by mass parts, stir and mix to obtain a total of about 100g of monomer mixture ( A); then, take by weighing 0.5% by mass parts of A, the initiator AIBN of about 0.5g is mixed with A, and an ultrasonic cleaner with a power of 1KW carries out ultrasonic dispersion for 30min to obtain a total of about 100.5g transparent-slightly turbid liquid (B).

[0029] (2) Weigh 90.45g of about 90% by mass of B, then add 2% by mass of A, about 2.0g of molecular weight modifier thioglycolic acid, stir and mix well, record it as B1, and place it in the dropping funnel, spare.

[0030] (3) Add 42.85g of MB / BA solvent (MB:BA mass ratio = 1:1) and 10.05g of B, about 10% by mass, into a three-necked flask equipped with a thermometer, a stirrer and a dropping funnel, Stir to mix, pass N 2 Protect, stir and heat to 80°C to react for 10 minutes, then add B1 dropwise,...

Embodiment 2

[0032] (1) Weigh 30.0g lauryl methacrylate, 25.0g cyclohexyl acrylate, 14.5g benzyl vinyl ether, 30.0g allyl succinic anhydride, 0.5g acrylic acid in order by mass parts, stir and mix well, Obtain a total of 100g of monomer mixture (A); then, take 2% by weight of A, about 2.0g of initiator BPO and mix with A, and use an ultrasonic cleaner with a power of 1KW to carry out ultrasonic dispersion for 30min to obtain a total of About 102.0 g of clear liquid (B).

[0033] (2) Weigh 71.4g, about 70% by mass of B, then add 0.5% by mass of A, about 0.5g molecular weight modifier dodecanethiol, stir and mix well, record it as B1, and place it in the dropping funnel ,spare.

[0034] (3) Add 100g of DMB / EA solvent (DMB:EA mass ratio = 3:2) and 30.6g, about 30% by mass of B, into a three-necked flask equipped with a thermometer, a stirrer and a dropping funnel, Stir to mix, pass N 2 Protect, stir and heat to 70°C to react for 30 minutes, then add B1 dropwise, control the rate of B1 to d...

Embodiment 3

[0036] (1) Weigh 24.0g methyl acrylate, 30.0g butyl methacrylate, 20.0g stearyl methacrylate, 25.0g 2-octenyl succinic anhydride, 1.0g methacrylic acid in order by mass parts, stir and mix homogeneously, to obtain a total of 100g of monomer mixture (A); then, take 1% by weight of A, about 1.0g of initiator BPO and mix with A, and use an ultrasonic cleaner with a power of 1KW to carry out ultrasonic dispersion for 20min. A total of about 101.0 g of clear liquid (B) was obtained.

[0037] (2) Weigh 80.8g of about 80% by mass of B, then add 1% by mass of A, about 1.0g of molecular weight regulator thioglycolic acid, stir and mix well, record it as B1, put it in the dropping funnel, spare.

[0038] (3) Add 66.67g of BA and 20.2g of about 20% by weight of B in turn into a three-necked bottle equipped with a thermometer, a stirrer and a dropping funnel, stir and mix well, and pass through N 2 Protect, stir and heat to 80°C to react for 15min first, then add B1 dropwise, control th...

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Abstract

The invention discloses a preparation method of a latent anhydride-based modified acrylate resin curing agent and the application of the resin in latent self-curing epoxy resin coatings and coatings. Free-radical copolymerization of aliphatic / alicyclic acrylates with alkenyl phenyl derivatives, unsaturated anhydrides containing double bonds, and unsaturated aliphatic carboxylic acids in a solvent to synthesize anhydride-based modified acrylate resins CAPA: Using CAPA resin as a curing component and using it in a latent epoxy resin coating system can not only obtain a coating with good storage stability at room temperature, but also achieve self-curing of the epoxy resin coating after heating. The present invention introduces the anhydride group into the acrylic resin system through the copolymerization reaction, not only successfully transforms the solid anhydride into a liquid form that is convenient to use, but also solves the defects of poor solubility and reactivity between the small molecule solid anhydride and the epoxy resin, and the introduction of the acrylate resin segment It also has the effect of improving the flexibility and other physical and mechanical properties of epoxy coatings.

Description

technical field [0001] The invention belongs to the field of latent macromolecular curing agents in resin coatings, in particular to a method for preparing a latent anhydride-based modified acrylate resin curing agent and its application in latent self-curing epoxy resin coatings and coatings application. Background technique [0002] Epoxy resin coating has good adhesion, strong adhesion, excellent chemical corrosion resistance, and the cured coating has good electrical insulation properties, so it is used in anti-corrosion and bonding of chemical equipment, cable moisture-proof and circuit board packaging, Electronic and electrical components are widely used in potting and insulation, but traditional epoxy resin coatings need to be cross-linked and cured under the action of curing agents such as organic amines, dicyandiamide, and hexahydrophthalic anhydride. This can be seen in patents CN104927565A, CN102617984A , CN109988429A, CN109851760A, CN110054965A, etc. Obviously,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/18C08F212/08C08F222/04C08F220/64C08F216/16C08F220/06C08F220/14C08F222/06C08F214/14C09D163/00C08G59/42
CPCC08F220/1804C08F220/1812C08F220/1818C08G59/4238C09D163/00C08F212/08C08F222/04C08F220/64C08F220/1806C08F216/165C08F220/06C08F220/14C08F222/06C08F220/1811C08F214/14
Inventor 安秋凤杨博文金晶史书源焦岚姣黄良仙薛朝华
Owner SHAANXI UNIV OF SCI & TECH
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