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Heat-resistant unsaturated polyester resin and preparation method thereof

A polyester resin, unsaturated technology, applied in the field of heat-resistant unsaturated polyester resin and its preparation, can solve the problems of less practical application of unsaturated polyester resin, special modifier type, complicated process route, etc., to achieve Effects of low saturated vapor pressure, improved heat resistance, and high reaction rate

Active Publication Date: 2019-04-30
WUXI ACRYL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

By modifying these methods, the heat resistance of unsaturated polyester resin can be improved, but either the type of modifier used is special, the price is expensive or the process route involved is complicated, making these modified heat-resistant unsaturated Polyester resins are rarely used in practical applications

Method used

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  • Heat-resistant unsaturated polyester resin and preparation method thereof
  • Heat-resistant unsaturated polyester resin and preparation method thereof
  • Heat-resistant unsaturated polyester resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation of heat-resistant type unsaturated polyester resin, concrete steps are as follows:

[0029] (1) Prepare raw materials: prepare the reaction raw materials, and the molar ratio of the feed is: n (propylene glycol): n (external-2,3-epoxy norbornane): n (phthalic anhydride): n (maleic di anhydride)=1:10:2.5:7.5.

[0030] (2) Feeding: 0.1% hexadecyl of propylene glycol, phthalic anhydride, maleic anhydride and the total mass of reaction raw materials are put into the reaction kettle with stirring temperature control, condensing reflux and dripping device Trimethylammonium bromide, start stirring, raise the temperature to 120°C, and react for 1h.

[0031] (3) Preparation of unsaturated polyester oligomers: use 5% toluene of the total mass of the reaction raw materials to dissolve and dilute the metered external-2,3-epoxynorbornane and put it into a constant pressure dropping funnel to feed the reaction system The toluene solution of exo-2,3-epoxynorbornane w...

Embodiment 2

[0035] The preparation of heat-resistant type unsaturated polyester resin, concrete steps are as follows:

[0036] (1) Prepare raw materials: prepare the reaction raw materials, and the molar ratio of the feed is: n (ethylene glycol): n (external-2,3-epoxy norbornane): n (phthalic anhydride): n (butanyl olefinic anhydride)=1:9.5:3:7.

[0037](2) Feeding: 0.25% of the total mass of ethylene glycol, phthalic anhydride, maleic anhydride and reaction raw materials in a reaction kettle with stirring temperature control, condensing reflux and dripping device Alkyltrimethylammonium chloride, start stirring, raise the temperature to 130°C, and react for 2 hours.

[0038] (3) Preparation of unsaturated polyester oligomers: use 10% toluene of the total mass of the reaction raw materials to dissolve and dilute the metered external-2,3-epoxynorbornane and put it into a constant pressure dropping funnel, and add to the reaction system The toluene solution of exo-2,3-epoxynorbornane was a...

Embodiment 3

[0042] The preparation of heat-resistant type unsaturated polyester resin, concrete steps are as follows:

[0043] (1) Prepare raw materials: prepare the reaction raw materials, the molar ratio of feeding is: n (diethylene glycol): n (external-2,3-epoxy norbornane): n (phthalic anhydride): n (maleic anhydride) = 2:9:5:5.

[0044] (2) Feeding: Put 0.5% of the total mass of diethylene glycol, phthalic anhydride, maleic anhydride and reaction raw materials into the reaction kettle with stirring temperature control, condensing reflux and dripping device. % dodecyltrimethylammonium chloride, start stirring, raise the temperature to 140°C, and react for 3h.

[0045] (3) Preparation of unsaturated polyester oligomers: use 8% toluene of the total mass of the reaction raw materials to dissolve and dilute the metered external-2,3-epoxynorbornane and put it into a constant pressure dropping funnel, and pour into the reaction system The toluene solution of exo-2,3-epoxynorbornane was ad...

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Abstract

The invention discloses heat-resistant unsaturated polyester resin and a preparation method thereof. The prepared unsaturated polyester resin has a wide application in the fields of automobiles, electronic apparatuses and electronic products. The preparation method comprises the following steps: inputting saturated dihydric alcohol, phthalic anhydride, maleic anhydride and a catalyst into a reaction kettle and heating and stirring the mixture to react; diluting 2,3-exo-epoxynorbornane with methylbenzene and putting the 2,3-exo-epoxynorbornane on a constant pressure dropping funnel, slowly dropwise adding the 2,3-exo-epoxynorbornane into a reaction bottle, and keeping the temperature and continuously performing a reaction; distilling a solvent and a non-reactant at a reduced pressure to prepare an unsaturated unsaturated polyester low polymer; and cooling the unsaturated unsaturated polyester low polymer to a certain temperature, slowly inputting the unsaturated unsaturated polyester low polymer into a diluting pot filled with a diluent and a trace amount of polymerization inhibitor, and cooling and filtering the mixture, and discharging the mixture. The prepared heat-resistant unsaturated polyester can form a heat-resistant unsaturated polyester resin cured material with an intermediate temperature curing agent. According the invention, by taking an alicyclic (methyl) acrylate monomer containing a bridge ring structure as the diluent and introducing an alicyclic unit with the bridge ring structure into a main chain of the unsaturated polyester through the 2,3-exo-epoxynorbornane, heat resistance of the unsaturated polyester resin can be improved and good mechanical strength can be kept.

Description

technical field [0001] The present invention relates to a heat-resistant unsaturated polyester resin and a preparation method thereof, in particular to an alicyclic heat-resistant unsaturated polyester resin with a main chain and a cross-linked branched chain containing a bridging ring structure and a composition thereof The prepared unsaturated polyester resin has a wide range of applications in the fields of automobiles, electrical appliances and electronic products. Background technique [0002] Unsaturated polyester occupies a major position in the parts of automobiles, electrical appliances and electronic products. With the continuous improvement of people's living standards, the demand for automobiles, electrical appliances and electronic products is increasing. Higher requirements are put forward in terms of heat resistance, flame resistance and dimensional stability of polyester materials. Therefore, improving the heat resistance of unsaturated polyester has become ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/58C08F283/01C08F220/18
CPCC08F283/01C08G63/58C08F220/18
Inventor 施英张文泉朱萌潘萍尤卫民
Owner WUXI ACRYL TECH