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Styrene-free environment-friendly unsaturated resin for insulating paint and preparation process thereof

A styrene-free, preparation technology, applied in the direction of coatings, polyester coatings, etc., can solve the problems of human health and environmental hazards, low flash point, volatile, etc., to maintain curing performance, improve compatibility, change regularity effect

Pending Publication Date: 2021-03-19
NANTONG TIANHE RESIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are some defects in the application of styrene in unsaturated resins, mainly because of its low flash point, it is easy to volatilize in an open system, and it has a strong smell, especially in summer when the temperature is high, which brings great harm to human health and the environment. harm

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The unsaturated resin components include 2 parts of propylene glycol, 1 part of ethylene glycol, 2 parts of diethylene glycol, 3 parts of maleic anhydride, 4 parts of phthalic anhydride, 5 parts of benzoic acid and phthalic acid in parts by weight. 4 parts of diallyl diformate, 2 parts of vinyl toluene.

[0020] The preparation process of the present embodiment comprises the following steps:

[0021] A. Polycondensation reaction: react propylene glycol, ethylene glycol, diethylene glycol with maleic anhydride and phthalic anhydride in a molar ratio of 2:2:1:3:1 until the acid value reaches 60mgKOH / g;

[0022] B, end-capping esterification reaction: step A polycondensation reactant is cooled to 160 ℃, adding molar weight is the organic terminal acid benzoic acid of polycondensation reaction alcohol molar weight 12% and reacts, reaches 60mgKOH / g to acid value;

[0023] C, vacuum negative pressure reaction: open the vacuum pump, make the polyester obtained in step B pre...

Embodiment 2

[0030] The unsaturated resin components include 6 parts by weight of propylene glycol, 3 parts of ethylene glycol, 5 parts of diethylene glycol, 6 parts of maleic anhydride, 8 parts of phthalic anhydride, 10 parts of benzoic acid, 10 parts of diallyl diformate, 6 parts of vinyl toluene.

[0031] The preparation process of the present embodiment comprises the following steps:

[0032] A. Polycondensation reaction: react propylene glycol, ethylene glycol, diethylene glycol with maleic anhydride and phthalic anhydride in a molar ratio of 2:2:1:3:1 until the acid value reaches 65mgKOH / g;

[0033] B, end-capping esterification reaction: step A polycondensation reactant is cooled to 160 ℃, adding molar mass is the organic terminal acid benzoic acid of polycondensation reaction alcohol molar mass 12% and reacts, reaches 65mgKOH / g to acid value;

[0034] C, vacuum negative pressure reaction: open the vacuum pump, make the polyester obtained in step B pressurize and heat, until the ...

Embodiment 3

[0041] The unsaturated resin components include 3 parts by weight of propylene glycol, 2 parts of ethylene glycol, 3 parts of diethylene glycol, 4 parts of maleic anhydride, 5 parts of phthalic anhydride, 6 parts of benzoic acid, 5 parts of diallyl diformate, 3 parts of vinyltoluene.

[0042] The preparation process of the present embodiment comprises the following steps:

[0043] A. Polycondensation reaction: react propylene glycol, ethylene glycol, diethylene glycol with maleic anhydride and phthalic anhydride in a molar ratio of 2:2:1:3:1 until the acid value reaches 62mgKOH / g;

[0044] B, end-capping esterification reaction: step A polycondensation reactant is cooled to 160 ℃, adds molar mass and is the organic terminal acid benzoic acid of polycondensation reaction alcohol molar mass 12% and reacts, reaches 61mgKOH / g to acid value;

[0045] C, vacuum negative pressure reaction: open the vacuum pump, make the polyester obtained in step B pressurize and heat, until the a...

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PUM

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Abstract

The invention discloses a styrene-free environment-friendly unsaturated resin for insulating paint and preparation process thereof. The unsaturated resin comprises the following components in parts byweight: 2-6 parts of propylene glycol, 1-3 parts of ethylene glycol, 2-5 parts of diethylene glycol, 3-6 parts of maleic anhydride, 4-8 parts of phthalic anhydride, 5-10 parts of benzoic acid, 4-10 parts of diallyl phthalate and 2-6 parts of vinyl toluene. The preparation process is simple, compared with a traditional unsaturated resin synthesis technology, a high-flash-point diallyl phthalate and vinyltoluene compounding technology is adopted to replace low-flash-point styrene as a diluent, the resin operation performance and curing performance are kept, The harm of volatilization of organicmatters to human bodies and the environment in the construction process is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of unsaturated resin preparation, in particular to an unsaturated resin for styrene-free environment-friendly insulating varnish and a preparation process thereof. Background technique [0002] Industrial-scale production of unsaturated polyester resins mainly uses glycols such as propylene glycol, ethylene glycol, diethylene glycol and dibasic acids or anhydrides such as maleic anhydride and isophthalic acid to undergo polycondensation reactions at high temperatures. In the later stage of the reaction, the water and low-molecular organic matter in the reaction system are removed by vacuum negative pressure or nitrogen gas reaction to obtain high-molecular-weight polyester. Finally, the polyester is lowered to a certain temperature, and it is dissolved and diluted in styrene to obtain unsaturated polyester. resin. The traditional manufacture of unsaturated resin mainly uses styrene as cross-linking monomer ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/676C08G63/81C09D167/06C09D5/25
CPCC08G63/676C08G63/81C09D167/06
Inventor 陈建朝
Owner NANTONG TIANHE RESIN
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