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Production and use for acrylic ester modified polyester resin

A technology of acrylate and modified polyester, which is applied in the chemical industry, can solve the problems of resin appearance and performance impact, difficult control of resin reaction process, fast viscosity increase, etc., to achieve good appearance and performance, increase the scope of application, Solve the effect of loss of light

Inactive Publication Date: 2007-09-05
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The physical splicing method is often used in China. Since the resins used for mutual splicing must have good compatibility, this method is limited in the range of resin selection and the performance after splicing.
Although there is only one step in the graft copolymerization method, the resin reaction process is difficult to control, the viscosity increases rapidly, and it is easy to cause gel phenomenon
The esterification method has a wide range of materials, simple equipment, and better control of the reaction process. Compared with the previous two methods, there are obvious advantages. However, the appearance and performance of the resin synthesized by this method still need to be improved, mainly in the order of addition and reaction temperature. and other factors have a great influence on the appearance and performance of the resin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Add 60g of xylene into a four-necked flask equipped with a thermometer, a condenser and an electric stirrer, add 2g of acrylic acid, 15g of methyl methacrylate, 25g of butyl acrylate, 20g of styrene, 1.86g of dicumyl peroxide and 1.24 1g of mercaptan was mixed evenly, placed in the dropping funnel, washed the container containing the mixed solution with 20g of xylene and incorporated the washed liquid into the dropping funnel. Heat the reaction device to 120°C, add the mixture dropwise into a four-neck flask within 2h and reflux at 130°C for 3h. Finally, the temperature is lowered and the material is discharged to obtain an acrylate prepolymer.

Embodiment 2

[0037] Add 40g of xylene into a four-necked flask equipped with a thermometer, a condenser and electric stirring, add 5g of acrylic acid, 10g of methyl methacrylate, 15g of butyl acrylate, 12g of styrene, 0.42g of dicumyl peroxide and 0.42 1g of mercaptan was mixed evenly, placed in the dropping funnel, washed the container containing the mixed solution with 20g of xylene and incorporated the washed liquid into the dropping funnel. The reaction device was heated to 140°C, and the mixture was added dropwise into a four-neck flask within 2h and refluxed at 140°C for 3h. Finally, the temperature is lowered and the material is discharged to obtain an acrylate prepolymer.

Embodiment 3

[0039] Add 1mol acrylate prepolymer, 2mol trimethylolpropane, 5mol neopentyl glycol, 4mol isophthalic acid and 0.5% catalyst n-butyl titanate, stirring under the protection of nitrogen, slowly raising the temperature to 220°C, and performing esterification reaction with heat preservation until the acid value is 5 mgKOH / g. Cool down to 140°C, then add 5mol phthalic anhydride and 6mol adipic acid to the reaction system, raise the temperature to 170°C within 0.5h, keep warm for esterification reaction until the acid value is 15mgKOH / g, cool down to room temperature and discharge for storage . The properties of the resulting resin are shown in Example 1 of Table 2.

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Abstract

Production of acrylic ester modified resin is carried out by taking acrylic acid, methyl acrylic ester monomer, acrylic ester monomer and phenylethylene as raw materials, synthesizing acrylic ester pre-polymer under the action of initiating agent and chain-transfer agent, synthesizing acrylic ester modified resin by acrylic ester pre-polymer, polyhydric alcohol and polyprotic acid under the action of catalyst and adding into mixed solvent to obtain the final product. It's simple and cheap, has good appearance and performance and excellent compatibility.

Description

technical field [0001] The invention belongs to the field of chemical industry, and relates to an acrylate-modified polyester resin and a preparation method thereof. Background technique [0002] Polyester resin has excellent heat resistance, cold resistance, water resistance, chemical resistance and electrical properties, and has the advantages of good coloring performance, low viscosity, good fullness and vividness, etc. It is a coating resin with excellent performance . Polyester resins are often combined with amino resins to prepare decorative coatings, but because the solubility parameters of polyester resins and amino resins are quite different, the compatibility between the two is not ideal, resulting in polyester varnishes that are prone to loss of gloss and transparency during use. Insufficient and other defects greatly limit the scope of use of polyester resins. [0003] The preparation method of acrylate-modified polyester resin includes three kinds of "combinin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/21
Inventor 王国建王艳春刘琳
Owner TONGJI UNIV
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