Low-temperature self-cross-linking waterborne epoxy modified acrylic resin, preparation method and application thereof

An acrylic resin, water-based epoxy technology, applied in applications, home appliances, inks, etc., can solve the problems of poor resin stability, difficult to control, and high temperature of ring-opening reaction, and achieve strong adhesion, improved adhesion, and good stability. Effect

Active Publication Date: 2021-07-13
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prepared coating film has good properties, but the resin has the following defects: 1) The epoxy resin needs to be ring-opened with the carboxyl monomer first, and the ring-opening reaction temperature is high (190-210°C), so there are many preparation steps and energy The consumption is high, and it is necessary to add a polymerization inhibitor to reduce the gel produced by the reaction, which is difficult to control; 2) The second step of resin preparation, in the synthesis process of single-component room temperature multiple self-crosslinking waterborne epoxy acrylic resin, epoxy ester The carbon-carbon double bond on the unsaturated fatty acid will also participate in the free radical polymerization reaction, and the self-crosslinking reaction will occur in advance, which makes the resin poor in stability and the prepared water-based ink has a short storage period

Method used

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  • Low-temperature self-cross-linking waterborne epoxy modified acrylic resin, preparation method and application thereof
  • Low-temperature self-cross-linking waterborne epoxy modified acrylic resin, preparation method and application thereof
  • Low-temperature self-cross-linking waterborne epoxy modified acrylic resin, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] 1) Preparation of water-based low-odor, low-temperature self-crosslinking modified acrylic resin

[0069] Take 0.6g of azobisisobutyronitrile and 60g of absolute ethanol, fully dissolve them, put them into a reaction kettle with a reflux condenser, and keep reflux at 78°C for 30min; mix 40g of methyl methacrylate, 35g of butyl acrylate ester, 3g acrylic acid, 15g hydroxypropyl acrylate, 5g E-51 epoxy resin, 2g vinyltriethoxysilane, 3g diacetone acrylamide, 2.4g azobisisobutyronitrile, mix and then use The peristaltic pump completed the dropwise addition for 3 hours, and controlled the reaction temperature to 82°C. After the dropwise addition was completed, keep the temperature for 3h; after the heat preservation, lower the temperature of the reactor to 45°C, and add 3g of ammonia water and 0.4g of dimethylethanolamine for neutralization for 15min; Then add 90g of deionized water and 2.4g of adipic acid dihydrazide, stir for 15-20min, filter and discharge. A low-tempera...

Embodiment 2

[0073] 1) Preparation of water-based low-odor, low-temperature self-crosslinking modified acrylic resin

[0074]Take 0.8g of azobisisoheptanonitrile, 60g of absolute ethanol, and 10g of isopropanol after fully dissolving them, add them into a reaction kettle with a reflux condenser, and keep reflux at 78°C for 30min; add 45g of ethyl methacrylate, 30g of butyl acrylate, 2.5g of acrylic acid, 0.5g of itaconic acid, 16g of hydroxypropyl acrylate, 5g of E-51 epoxy resin, 1.5g of γ-(methacryloxy)propyltrimethoxysilane, 3.5g N-methylolacrylamide and 3.2g of azobisisoheptanonitrile were mixed, and then added dropwise with a peristaltic pump for 3 hours, and the reaction temperature was controlled at 82°C. After the addition was completed, keep warm for 3 hours; , lower the temperature of the reactor to 45°C, add 2.5g of ammonia water and 0.3g of dimethylethanolamine to neutralize for 15min; then add 90g of deionized water and 2.8g of oxalic acid dihydrazide, stir for 15-20min, filte...

Embodiment 3

[0078] 1) Preparation of water-based low-odor, low-temperature self-crosslinking modified acrylic resin

[0079] Take 0.5g of benzoyl peroxide, 75g of absolute ethanol and 5g of isopropanol, fully dissolve them, put them into a reaction kettle with a reflux condenser, keep reflux at 80°C for 30min; add 50g of isobutyl methacrylic acid ester, 25g methyl acrylate, 3g methacrylic acid, 16g hydroxypropyl methacrylate, 8g E-12 epoxy resin, 3g vinyltriethoxysilane, 2g N-hydroxyethylacrylamide, 2g Azobisisobutyronitrile was mixed, then added dropwise with a peristaltic pump for 2.5 hours, and the reaction temperature was controlled at 82°C. After the dropwise addition was completed, it was kept for 3 hours; after the heat preservation was completed, the temperature of the reactor was lowered to 45°C, and 3g of ammonia water and 0.4g of triethylamine were neutralized for 15 minutes; then 85g of deionized water and 2.4g of succinic acid dihydrazide were added, stirred for 15-20 minutes...

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Abstract

The invention discloses low-temperature self-cross-linking waterborne epoxy modified acrylic resin, a preparation method and application thereof. The modified acrylic resin is obtained by reacting a mixed solution formed by mixing part of an initiator, a hard monomer, a soft monomer, a first hydrophilic monomer, a second hydrophilic monomer, epoxy resin, a cross-linking monomer and organosiloxane with the residual initiator dissolved in an organic solvent, adjusting the pH value, then adding binary hydrazide and deionized water, and filtering. According to the invention, the prepared low-temperature self-cross-linking waterborne epoxy modified acrylic resin is compounded with water-based color paste to form single-component water-based ink for printing or ink-jet printing on a low-polarity plastic film, the single-component water-based ink is low in organic solvent content, high in drying speed, small in neutralizer dosage and small in film-forming odor, and is safe and environment-friendly, the coating film has low-temperature self-cross-linking property (less than 60 DEG C) on a plastic film, the tinting strength is good, the adhesion fastness reaches 100%, the preparation process is simple, and the production cost is low.

Description

technical field [0001] The invention relates to a water-based epoxy-modified acrylic resin, in particular to the preparation and application of a low-temperature self-crosslinking water-based epoxy-modified acrylic resin, belonging to the field of water-based resins. Background technique [0002] Water-based inks are composed of water-based resins, pigments, solvents and additives, and are inks with water as the main solvent or dispersant. Although water-based ink has very obvious advantages, the water-based inks produced in China generally have disadvantages such as slow drying speed, poor water resistance, insufficient adhesion, and low gloss. These shortcomings also inhibit its rapid development and application. In order to apply water-based inks well on plastic films, water-based resins are the key. Water-based resin is not only environmentally friendly, but also can be mixed with color pastes of various colors to provide aesthetic feeling, and at the same time, it also...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/32C08F283/10C08F220/14C08F220/18C08F220/06C08F220/20C08F220/58C08F230/08C08F222/02C08F220/28C08F220/32C09D11/107
CPCC08F8/32C08F283/10C09D11/107C08F220/14C08F220/1804C08F220/06C08F220/20C08F220/58C08F230/085C08F220/1802C08F222/02C08F220/1811C08F220/283C08F220/325
Inventor 皮丕辉欧蔼新邱瑞灏文秀芳徐守萍程江
Owner SOUTH CHINA UNIV OF TECH
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