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A kind of preparation method of high-performance water-soluble high-solid low-viscosity acrylic resin

An acrylic resin and water-soluble technology, which is applied in the field of preparation of high-performance water-soluble high-solid and low-viscosity acrylic resin, can solve the problems of poor flexibility and heat and humidity resistance of water-based acrylic resin coatings, and cannot meet the requirements of high-performance coatings. Strong impact resistance, moderate molecular weight, and the effect of lowering the film-forming temperature

Active Publication Date: 2020-12-15
INST OF APPLIED CHEM JIANGXI ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These can only solve part of the problem and cannot meet the requirements of high-performance coating
[0004] The poor flexibility and moisture resistance of water-based acrylic resin coatings are problems that people pay attention to. In order to prepare high-performance water-soluble high-solid and low-viscosity acrylic resins, these defects must be well resolved to meet the requirements of high-performance water-based industrial coatings. skills requirement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0040] The present invention relates to a preparation method and application of a high-performance water-soluble high-solid and low-viscosity acrylic resin. The material formula used in the preparation method of the acrylic resin in this example is as follows: 7-12 parts of acrylic acid, 10-25 parts of n-butyl acrylate , 0-10 parts of n-butyl methacrylate, 10-20 parts of styrene, 10-30 parts of methyl methacrylate, 1-6 parts of laurate methacrylate, 2-10 parts of vinyl tertiary carbonate, methyl 26-35 parts of hydroxyethyl acrylate, 1-6 parts of methacryloxypropyl trimethoxysilane, 0.75-2.25 parts of chain transfer agent, 1.8-6.7 parts of initiator, 4.4-12 parts of amine neutralizer .

[0041] The steps of the preparation method of present embodiment acrylic resin are as follows:

[0042] (1) Prepare dry and clean reaction kettles and dripping kettles to ensure the smoothness of the pipelines, the normal operation of instruments, valves, and motors, and the normal use of stea...

Embodiment 1

[0062] Take 40 parts of n-butanol and 23 parts of isopropanol into the reaction kettle, stir to fill with nitrogen, heat to reflux, and control the reaction temperature at 82±2°C; add 9 parts of acrylic acid, 10 parts of n-butyl acrylate, and 2 parts of vinyl tert-carbonate , 2 parts of laurate methacrylate, 15 parts of styrene, 28.5 parts of methyl methacrylate, 32.5 parts of hydroxyethyl methacrylate, 1.8 parts of dodecyl mercaptan, 3.6 parts of azobisisobutyronitrile Stir in the dripping kettle, fully mix and dissolve; 3.5 hours to complete the dripping; keep warm for 15 minutes, add 1 part of methacryloxypropyl trimethoxysilane and 2 parts of isopropanol into the dropping kettle and stir, and finish dripping for 15 minutes; continue to keep warm 1h, add 0.4 parts of azobisisobutyronitrile and 2 parts of ethanol into the dripping kettle and stir, fully mix and dissolve; after 0.5h of dripping, keep warm for 1h; Add 5.6 parts of N,N-dimethylethanolamine into the dripping ket...

Embodiment 2

[0064] Take 40 parts of propylene glycol methyl ether and 23 parts of ethylene glycol butyl ether into the reactor, stir to fill with nitrogen, heat to reflux, and control the reaction temperature at 91±2°C; add 9 parts of acrylic acid, 12 parts of n-butyl acrylate, vinyl tertiary 6 parts, 1 part of laurate methacrylate, 15 parts of styrene, 23.5 parts of methyl methacrylate, 32.5 parts of hydroxyethyl methacrylate, 1.25 parts of lauryl mercaptan, 1.8 parts of benzoyl peroxide Add to the dripping kettle and stir, fully mix and dissolve; 3.5 hours to complete the dripping; keep warm for 15 minutes, add 1 part of methacryloxypropyltrimethoxysilane and 2 parts of isopropanol to the dropping kettle and stir, and the dripping is completed for 15 minutes; continue Keep warm for 1h, add 0.2 parts of benzoyl peroxide, 1 part of ethyl acetate, and 1 part of isopropanol into the dripping kettle and stir, fully mix and dissolve; after 0.5h of dripping, keep warm for 1h; stop heating, pass...

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Abstract

The invention discloses a method for preparing a high-performance water-soluble high-solid and low-viscosity acrylic resin. In a compound solvent system, the acrylic resin is prepared by continuous radical solution polymerization, and the resin is endowed with water solubility. Modified with tertiary carbonate, introducing a large branched chain structure, reducing the intermolecular force, lowering the viscosity of the resin, and making the high solid resin have a lower viscosity. The tertiary carbonic acid group significantly increases the water resistance and alcohol resistance of the paint film, significantly improves the toughness and impact resistance of the paint film, and has little effect on the hardness of the paint film. The present invention uses organosilicon to modify the acrylic resin to improve the properties of the paint film such as heat and humidity resistance and corrosion resistance; the amino resin is used as the curing agent to directly prepare water-based aminoacrylic acid baking varnish, and the paint film has hardness, fullness, water resistance and alcohol resistance. , salt spray resistance, etc., suitable for industrial coating of automobiles, bicycles, agricultural machinery and other industries, and can also be used for coating of fishing rods, wine bottles, dining tables and other industries that have certain requirements for resistance to humidity, heat and pollution.

Description

technical field [0001] The invention relates to a preparation method of a high-performance water-soluble high-solid and low-viscosity acrylic resin, belonging to the technical field of water-based industrial coatings. Background technique [0002] Water-based acrylic resin has good light resistance, weather resistance, light color, good heat resistance, chemical resistance and good construction performance, and is widely used in architectural latex paint and water-based industrial coatings. However, the coating film of water-based acrylic paint is hard and brittle, softened by heat, and insufficient water resistance is also exposed. [0003] According to the general method to prepare acrylic resin, high solid content and high viscosity, high hardness means brittleness, good flexibility means softness, poor water resistance and solvent resistance. For example, in order to reduce the viscosity of the resin and improve the flexibility of the resin, the publication number CN201...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/20C08F220/06C08F220/18C08F218/10C08F230/08C08F212/08C08F220/14C08F2/38C09D133/14C09D5/16C09D5/08
CPCC08F2/38C08F220/20C09D5/08C09D5/1662C09D143/04C08F220/06C08F220/1804C08F212/08C08F218/10C08F230/08C08F220/14C08F6/10C08F8/32C08F8/44C08F265/04C08F2800/20C08F2810/50C09D151/003C09D7/20C08F230/085C08L51/003C08F297/026C08F2810/20C09D153/00C09D7/43C09D7/45C09D7/47C09D7/63
Inventor 曾国屏王刚胡震宇张军王小玉
Owner INST OF APPLIED CHEM JIANGXI ACAD OF SCI
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