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Method for synthesizing unsaturated polyester resin by utilizing glycerol

A polyester resin, unsaturated technology, applied in the field of polymer compound synthesis, can solve problems such as easy gelation and difficult reaction control, and achieve the effect of reducing production costs and good economic benefits

Active Publication Date: 2011-10-19
ZHAOQING FUTIAN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is due to the fact that in the conventional synthesis process, the use of a large amount of polyols will cause problems such as difficult control of the reaction and easy gelation in the later stage.

Method used

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  • Method for synthesizing unsaturated polyester resin by utilizing glycerol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The raw material formula is as follows:

[0026] Phthalic anhydride 270kg, maleic anhydride 350kg, benzoic acid 200kg, glycerin 280kg, propylene glycol 80kg, diethylene glycol 200kg, styrene 800kg, hydroquinone 100g, paraffin 300g, copper naphthenate 40g, defoaming Dosage 1kg;

[0027] Preparation:

[0028] 1) Weigh each synthetic raw material component according to the weight ratio, check and confirm whether the equipment, electrical appliances, instruments, valves and raw materials are normal;

[0029] 2) Add phthalic anhydride, maleic anhydride, benzoic acid, glycerin, propylene glycol and diethylene glycol into the reaction pot in the order of feeding liquid materials first and then solid materials, raise the temperature to 145°C, and pour into the reaction pot Introduce nitrogen gas, the flow rate of the nitrogen gas is 0.5m 3 / h, horizontal condenser water supply;

[0030] 3) When the material temperature rises to 150°C, turn on the mixer with a stirring rate ...

Embodiment 2

[0036] The raw material formula is as follows:

[0037] Phthalic anhydride 350kg, maleic anhydride 300kg, benzoic acid 110kg, glacial acetic acid 60kg, glycerin 95kg, propylene glycol 80kg, diethylene glycol 300kg, styrene 800kg, hydroquinone 110g, paraffin 350g, copper naphthenate 40g, defoamer 1kg;

[0038] Preparation:

[0039] 1) Weigh each synthetic raw material component according to the weight ratio, check and confirm whether the equipment, electrical appliances, instruments, valves and raw materials are normal;

[0040] 2) Add phthalic anhydride, maleic anhydride, benzoic acid, glacial acetic acid, glycerin, propylene glycol, and diethylene glycol into the reaction pot in the order of feeding liquid materials first and then solid materials, and heat up to 148°C. Nitrogen is passed into the reaction pot, and the flow rate of the nitrogen is 0.5m 3 / h, horizontal condenser water supply;

[0041] 3) When the material temperature rises to 150°C, turn on the mixer with ...

Embodiment 3

[0047] The raw material formula is as follows:

[0048] Phthalic anhydride 270kg, maleic anhydride 350kg, benzoic acid 200kg, glycerin 240kg, propylene glycol 80kg, diethylene glycol 200kg, styrene 800kg, hydroquinone 100g, paraffin wax 300g, copper naphthenate 40g, defoaming Dosage 1kg;

[0049] Preparation:

[0050] 1) Weigh each synthetic raw material component according to the weight ratio, check and confirm whether the equipment, electrical appliances, instruments, valves and raw materials are normal;

[0051] 2) Add phthalic anhydride, maleic anhydride, benzoic acid, glycerin, propylene glycol, and diethylene glycol into the reaction pot in the order of feeding liquid materials first and then solid materials, raise the temperature to 145°C, and pour into the reaction pot Introduce nitrogen gas, the flow rate of the nitrogen gas is 0.5m 3 / h, horizontal condenser water supply;

[0052] 3) When the material temperature rises to 155°C, turn on the mixer with a stirring ...

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PUM

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Abstract

The invention provides a method for synthesizing unsaturated polyester resin by utilizing glycerol. In the method, a weight ratio of synthetic raw materials, namely the glycerol to dihydric alcohol is 1:4-3:2. In addition, the synthetic raw materials also comprise components such as monobasic acid, dibasic acid, a cross-linking agent, a polymerization inhibitor, a defoaming agent and the like. In the method, a part of dihydric alcohol which is used in the conventional production method is replaced by a large amount of glycerol effectively, so the production cost of products is reduced substantially; meanwhile, the produced unsaturated polyester resin has high physical properties such as physical strength, toughness, rigidity and the like.

Description

technical field [0001] The invention belongs to the field of polymer compound synthesis, and in particular relates to a synthesis process of unsaturated polyester resin. Background technique [0002] Unsaturated polyester resin is the most commonly used type of thermosetting resin. It is formed by polycondensation of unsaturated dibasic acid diol or saturated dibasic acid unsaturated diol. It is formed by diluting cross-linking monomer or active solvent. A resin solution with a certain viscosity is a linear polymer compound with ester bonds and unsaturated double bonds, referred to as UPR. In the synthesis process of unsaturated polyester resin, diols such as propylene glycol, ethylene glycol, diethylene glycol, etc. are often used, while polyalcohols such as glycerin are rarely used. This is because the use of dihydric alcohols can make the reaction easy to carry out, the reaction rate is fast, and it is easy to obtain linear polyester macromolecules. Glycerol is a trihyd...

Claims

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Application Information

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IPC IPC(8): C08F283/01C08G63/676
Inventor 徐贵红
Owner ZHAOQING FUTIAN CHEM IND
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