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Unsaturated polyester resin preparation method

A polyester resin, unsaturated technology, applied in the field of preparation of unsaturated polyester resin, can solve the problems of low temperature resistance, low elongation at break, low reactivity, etc., to achieve stable quality, good performance, and synthetic process simple effect

Active Publication Date: 2009-12-30
HUACHANG POLYMER EAST CHINA UNIV OFSCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the currently commercially available xylene unsaturated polyester resin has low reactivity, and when the commonly used methyl ethyl ketone peroxide-cobalt naphthenate curing system is used, the curing exothermic peak is low, and it is easy to cure incompletely, and the mechanical properties of the resin cured product are low. Low elongation and low temperature resistance, which seriously limit its application in various FRP products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Add 200g of xylene formaldehyde resin and 48g of succinic acid into a reactor equipped with a thermometer, stirrer, nitrogen inlet pipe and condenser, stir and gradually raise the temperature to 180-200°C, and measure the acid value until it is lower than 10mgKOH / g. Then lower the temperature to below 160°C and add 89g of propylene glycol, 63g of fumaric acid, and 0.04g of hydroquinone in sequence, gradually raise the temperature to 200-210°C, and react until the acid value is lower than 30mgKOH / g. The temperature of the reaction product was lowered to 100° C., 180 g of styrene and 0.03 g of p-tert-butylcatechol were added, and stirred for 1 hour to obtain a light yellow viscous liquid.

Embodiment 2

[0030] Add 200g of xylene formaldehyde resin and 40g of adipic acid into the reactor with thermometer, stirrer, nitrogen inlet pipe and condenser, stir and gradually raise the temperature to 180-200°C, and measure the acid value until it is lower than 10mgKOH / g. Then lower the temperature to below 160°C and put in 106g of diethylene glycol, 73.5g of maleic anhydride, and 0.05g of methylhydroquinone in turn, gradually raise the temperature to 200-210°C, and react until the acid value is lower than 30mgKOH / g . The temperature of the reaction product was lowered to 100° C., 150 g of divinylbenzene and 0.03 g of tert-butylhydroquinone were added, and stirred for 1 hour to obtain a light yellow viscous liquid.

Embodiment 3

[0032] Add 200g of xylene formaldehyde resin and 26g of azelaic acid into the reactor with thermometer, stirrer, nitrogen inlet pipe and condenser, stir and gradually raise the temperature to 180-200°C, and measure the acid value until it is lower than 10mgKOH / g. Then lower the temperature to below 160°C and put in 62g of propylene glycol, 116g of maleic acid, and 0.05g of methylhydroquinone in turn, gradually raise the temperature to 200-210°C, and react until the acid value is lower than 30mgKOH / g. The temperature of the reaction product was lowered to 100° C., 165 g of chlorostyrene and 0.03 g of hydroquinone were added, and stirred for 1 hour to obtain a light yellow viscous liquid.

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PUM

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Abstract

An unsaturated polyester resin preparation method comprises the following steps: proportioning according to the weight percent of each component, adding xytene-formaldehyde resin and saturated binary acid in a reaction kettle containing a thermometer, a mixer, a nitrogen ingress pipe and a condenser, heating gradually to 180-200 DEG C until the measured acid value is below 10mgKOH / g while mixing the mixture; reducing the temperature below 160 DEG C, then adding unsaturated binary acid, diol and partial polymerization inhibitor, heating gradually to 200-210 DEG C to react until the acid value is below 30mgKOH / g; reducing the temperature of the reaction products to 100 DEG C, adding residual polymerization inhibitor and crosslinkable monomer, and mixing the mixture for 1h to obtain the finished product. The invention has the advantages that the preparation method has simple process, environmentally friendly and no discharge of the three wastes; the steric effect of xytene-formaldehyde resin on double-bonds is reduced through the chain extension of long chain saturated binary acid, the product has stable quality, and excellent performances such as high reactivity, high strength, high toughness, high temperature tolerance and the like and the product can be widely used in chemical industry, metallurgy and other industries for preparing acid and base storage tanks, pickling tanks, plating bathes, waste water treatment pools, pipelines, terraces and the like.

Description

technical field [0001] The invention relates to a preparation method of unsaturated polyester resin, in particular to a preparation method of xylene unsaturated polyester resin. Background technique [0002] Xylene unsaturated polyester resin has low viscosity and can be cured under normal temperature and pressure conditions. It has the advantages of convenient construction, low curing shrinkage rate and excellent corrosion resistance. The corrosion resistance of xylene unsaturated polyester resin is equivalent to bisphenol A resin, and the electrical insulation is even better than epoxy resin. Xylene unsaturated polyester resin is widely used in chemical industry, metallurgy, construction, electronics and other industries to make acid and alkali storage tanks, pickling tanks, electroplating tanks, wastewater treatment tanks, pipelines and floors, etc. [0003] However, the currently commercially available xylene unsaturated polyester resin has low reactivity, and when the ...

Claims

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Application Information

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IPC IPC(8): C08F283/01C08G63/676
Inventor 钱建华刘坐镇
Owner HUACHANG POLYMER EAST CHINA UNIV OFSCI & TECH
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