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Quickly crosslinked and cured water-based polyacrylate and preparation method thereof

A polyacrylate, cross-linking and curing technology, applied in the coating and other directions, can solve the problems of prolonging the cross-linking and curing time of acrylic resin coatings, and achieve the effect of shortening the curing time, improving the stability and fast curing

Active Publication Date: 2021-07-16
ZHEJIANG COLORAY TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polyacrylate molecular chain has a longer reactive anionic emulsifier segment, which prolongs the crosslinking and curing time of the acrylic resin coating.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of preparation method of the aqueous polyacrylate of fast cross-linking solidification, comprises the following steps,

[0027] 1. Add 6.75 kg of allyltrimethylammonium chloride and 8.6 kg of methacrylic acid to 102 kg of deionized water in turn. Under the protection of nitrogen, add 1.54 kg of 1.54 kg of methacrylic acid to the reaction system dropwise while stirring with a concentration of 10% by mass. % of azobisisobutylamidine hydrochloride solution for prepolymerization reaction, and after the dropwise addition, the insulation reaction was carried out for 15 minutes to obtain a dispersion of acrylic acid prepolymer;

[0028] 2. Add 10 kg of methyl methacrylate to the acrylic acid prepolymer dispersion obtained in step 1. After ultrasonic vibration for 20 minutes, under the protection of nitrogen, heat up to 70°C, and dropwise add mass percent to the reaction system while stirring. The ammonium persulfate solution with a concentration of 10% is used to initia...

Embodiment 2

[0030] A kind of preparation method of the aqueous polyacrylate of fast cross-linking solidification, comprises the following steps,

[0031] 1. Add 18 kilograms of allyltrimethylammonium bromide and 8.6 kilograms of methacrylic acid to 88.7 kilograms of deionized water in turn. Under the protection of nitrogen, add 2.13 kilograms dropwise to the reaction system with a concentration of 25% by mass while stirring. % ammonium persulfate solution for pre-polymerization reaction, after the dropwise addition, heat preservation reaction for 45 minutes to prepare an acrylic acid prepolymer dispersion.

[0032] 2. Add 22.8 kg of ethyl methacrylate to the acrylic acid prepolymer dispersion obtained in step 1. After ultrasonic vibration for 35 minutes, under the protection of nitrogen, heat up to 85°C, and dropwise add mass percent to the reaction system while stirring. Concentration is that the azobisisobutylamidine hydrochloride solution of 25% initiates the polymerization reaction, a...

Embodiment 3

[0034] A kind of preparation method of the aqueous polyacrylate of fast cross-linking solidification, comprises the following steps,

[0035] 1. Add 19.2 kilograms of diallyldimethylammonium chloride and 8.6 kilograms of acrylic acid to 139 kilograms of deionized water in sequence. Under the protection of nitrogen, add 2.78 kilograms dropwise to the reaction system with a concentration of 15% by mass while stirring. The azobisisobutylamidine hydrochloride solution was pre-polymerized, and after the dropwise addition was completed, the reaction was incubated for 30 minutes to prepare an acrylic acid prepolymer dispersion.

[0036] 2. Add 22.9 kg of isopropyl methacrylate to the acrylic acid prepolymer dispersion obtained in step 1. After ultrasonic vibration for 35 minutes, under the protection of nitrogen, heat up to 80°C, and dropwise add mass 100% to the reaction system while stirring. The ammonium persulfate solution with a concentration of 15% was used to initiate the poly...

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PUM

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Abstract

The invention belongs to the technical field of synthesis of film-forming resin special for coatings, and particularly relates to rapidly-crosslinked and cured water-based polyacrylate and a preparation method thereof. The preparation method comprises the following steps that step 1, an acrylic prepolymer dispersion liquid is prepared, specifically, a cationic monomer with C = C double bonds and an acrylic monomer are sequentially added into deionized water, under nitrogen protection, an initiator solution is added into a reaction system to carry out a prepolymerization reaction and then a heat preservation reaction is performed for 15-45 minutes, step 2, an acrylate monomer is added, heated to 70-85 DEG C, under the protection of nitrogen, the initiator solution is dropwise added into the reaction system to carry out an initiation polymerization reaction and the heat preservation reaction is performed for 80-100 minutes, after the reaction is completed, the pH value of the system is adjusted to 7.5-8.5 by using an alkaline solution, and the water-based polyacrylate emulsion is prepared. According to the present invention, rapid curing of the water-based polyacrylate emulsion is achieved, and the stability of the acrylic resin emulsion is improved.

Description

technical field [0001] The invention belongs to the technical field of synthesis of special film-forming resins for coatings, and relates to a fast cross-linked and solidified water-based polyacrylate and a preparation method thereof. Background technique [0002] Acrylic resin coatings have good chemical corrosion resistance, oil resistance, weather resistance, stain resistance, transparency and construction performance, and are widely used in plastic products, metal products, coil industry, textiles, wood products, construction, etc. and paper industry. Solvent-based acrylic resin coatings will release a large amount of volatile organic compounds (VOC) during the application and drying process, causing great harm to humans and the environment. In recent years, water-based acrylic resin coatings have the advantages of convenient construction and environmental protection, and have become the development trend of the industry. Acrylic resin emulsion is a kind of water-based...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F265/02C08F271/00C08F226/02C08F220/06C08F220/14C08F220/18C09D151/00
CPCC08F265/02C08F271/00C08F220/06C08F226/02C09D151/003C08F220/14C08F220/02C08F220/1802C08F220/1803C08F220/1804Y02E60/10
Inventor 姚超左士祥孟祥远卓仲标周铭唐骏李霞章钱大庆刘文杰
Owner ZHEJIANG COLORAY TECH DEV