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Method for producing high-solid low-viscosity acrylic resin through high pressure reaction

An acrylic resin, high-solid and low-viscosity technology, applied in the direction of coating, etc., can solve the problems of decreased weather resistance and chemical resistance of resin, slow decomposition speed of initiator, high viscosity, etc., and achieve the effect of improving workability

Active Publication Date: 2017-02-08
泰兴盛嘉树脂有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this process are: the production temperature is limited to the boiling point of the solvent, and the boiling point of conventional solvents is relatively low, ranging from 80 to 136°C
Therefore, when producing high-solid and low-viscosity acrylic resin, the decomposition rate of the initiator is slow, the molecular weight of the resin is large, the viscosity is high, and the molecular weight distribution is uneven.
In order to improve the distribution of molecular weight, if too much molecular weight regulator such as dodecyl mercaptan is used, the weather resistance and chemical resistance of the resin will be reduced, thereby affecting the performance of the coating.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The acrylic resin of the present embodiment, the raw material contains the following parts by weight: 15 parts by weight of xylene, 10 parts by weight of propylene glycol methyl ether, 25 parts by weight of methyl methacrylate, 20 parts by weight of styrene, 15 parts by weight of Butyl acrylate, 2.0 parts by weight of dicumyl peroxide. The preparation method of the acrylic resin comprises the following steps: firstly, adding the solvent xylene and propylene glycol methyl ether into the reactor, and stirring evenly; then, adding methyl methacrylate, styrene, butyl acrylate and diisoperoxide Propylbenzene was added into the reaction kettle and stirred evenly; the closed reaction kettle was ventilated with N 2 Pressurize to 0.6 MPa, raise temperature to 175°C, keep warm for 2.0 hours, cool down to below 100°C, and release pressure to normal pressure to obtain high-solid and low-viscosity acrylic resin.

Embodiment 2

[0023] The acrylic resin of the present embodiment, the raw material contains the following parts by weight: 20 parts by weight of xylene, 12 parts by weight of propylene glycol methyl ether, 30 parts by weight of methyl methacrylate, 30 parts by weight of styrene, 20 parts by weight of Butyl acrylate, the dicumyl peroxide of 2.5 parts by weight. The preparation method of the acrylic resin comprises the following steps: firstly, adding the solvent xylene and propylene glycol methyl ether into the reactor, and stirring evenly; then, adding methyl methacrylate, styrene, butyl acrylate and diisoperoxide Propylbenzene was added into the reaction kettle and stirred evenly; the closed reaction kettle was ventilated with N 2 Pressurize to 0.8 MPa, raise temperature to 180°C, keep warm for 2.0 hours, cool down to below 100°C, and release pressure to normal pressure to obtain high-solid and low-viscosity acrylic resin.

Embodiment 3

[0025] The acrylic resin of the present embodiment, the raw material contains the following parts by weight: 18 parts by weight of xylene, 10 parts by weight of propylene glycol methyl ether, 20 parts by weight of methyl methacrylate, 25 parts by weight of styrene, 20 parts by weight of Butyl acrylate, the dicumyl peroxide of 2.0 parts by weight. The preparation method of the acrylic resin comprises the following steps: firstly, adding the solvent xylene and propylene glycol methyl ether into the reactor, and stirring evenly; then, adding methyl methacrylate, styrene, butyl acrylate and diisoperoxide Propylbenzene was added into the reaction kettle and stirred evenly; the closed reaction kettle was ventilated with N 2 Pressurize to 0.8 MPa, raise temperature to 180°C, keep warm for 2.0 hours, cool down to below 100°C, and release pressure to normal pressure to obtain high-solid and low-viscosity acrylic resin.

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Abstract

The invention relates to a method for producing high-solid low-viscosity acrylic resin through high pressure reaction, belonging to the technical field of coating. The method for producing the high-solid low-viscosity acrylic resin through high pressure reaction comprises the following steps: adding a solvent xylene and propylene glycol monomethyl ether into a reaction kettle and stirring uniformly; adding a mixed monomer and an initiator into the reaction kettle and stirring uniformly; and sealing the reaction kettle, leading in non-reactant gas, pressurizing to 0.6-1.0MPa, heating up to 175-185 DEG C, insulating for reaction for 1.0-3.0 hours, cooling to 100 DEG C below, and relieving pressure to normal pressure. When the resin prepared by the method is prepared into coating, the gloss, chemical resistance and constructability of the coating are greatly upgraded, and the coating is suitable for the industrial fields of vehicles, machine parts and the like.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular, the invention relates to a method for producing high-solid and low-viscosity acrylic resin by high-pressure reaction. Background technique [0002] With the increasing awareness of global energy saving and environmental protection, coatings with high solid content and low VOC emissions are becoming mainstream. As the main film-forming substance in the paint: acrylic resin needs to meet the requirements of high solid and low viscosity. However, the current traditional production process of acrylic resin is atmospheric pressure production, which is difficult to produce high-solid, low-viscosity and high-quality acrylic resin. The existing atmospheric pressure method process is as follows: put 25% solvent xylene, propylene glycol methyl ether, etc. into the bottom of the reaction kettle, heat up to the reflux temperature of 135±2°C, and slowly add 75% mixed monomer: methyl methacryl...

Claims

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Application Information

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IPC IPC(8): C08F220/14C08F212/08C08F220/18C08F220/34C09D133/12C09D125/14
CPCC08F212/08C08F220/14C09D125/14C09D133/12C08F220/1804C08F220/34
Inventor 张丹军徐俊杨剑挺张辉
Owner 泰兴盛嘉树脂有限公司
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