Method for producing unsaturated polyester resin by utilizing refuse of biatomic acid such as terephthalic acid and catalyst used thereof

A technology of terephthalic acid and polyester resin, applied in the field of raw materials and catalysts for the production of unsaturated polyester resin, can solve the problems of low application value, achieve the effects of reducing production costs, speeding up the reaction speed, and being beneficial to environmental protection

Inactive Publication Date: 2004-06-30
陈少岳 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The application value of its products is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: prepare reaction mass by following ratio:

[0024] PTA waste residue (mol): diethylene glycol (mol): fumaric acid: styrene = 0.36: 1: 0.54: 1.62, the catalyst is selected from stannous oxide and the amount is 1 / 1000 of PTA waste residue.

[0025] Operation steps: 1. Put PAT waste residue, catalyst and diethylene glycol (80% of the total amount) into the reactor to heat up. After the materials are dissolved, start stirring and blow nitrogen.

[0026] 2. Stir and heat up to 200°C, keep warm for reaction and maintain; reflux column top temperature at 105-110°C, reflux for 6-8 hours, the liquid turns from cloudy to transparent with an acid value of 8-10. Cool down to 150°C and prepare for secondary feeding.

[0027] The second step reaction: 1. Put in unsaturated dibasic acid and the remaining saturated dibasic alcohol according to the formula, then raise the temperature, and pass nitrogen gas after the materials are melted.

[0028] 2. Raise the temperature...

Embodiment 2

[0031] Embodiment 2: prepare reaction mass by following ratio:

[0032] PTA waste residue (mol): diethylene glycol (mol): fumaric acid: styrene=0.41: 1: 0.50: 1.38, the catalyst is selected stannous oxide and is used in an amount according to PTA waste residue 1 / 1000.

[0033] The operation steps are the same as above.

Embodiment 3

[0034] Embodiment 3: prepare reaction mass by following ratio:

[0035] PTA waste residue (mol): diethylene glycol (mol): fumaric acid: styrene=0.45: 1: 0.45: 1.15, the catalyst selects stannous oxide and uses 1 / 1000 of PTA waste residue.

[0036] The operating steps are the same as in Example 1.

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PUM

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Abstract

The invention discloses a method to use binary ester wastes like P-phthalic acid to prepare unsaturated polyester resin, substituting fully or partly industrial waste residue containing binary acid for the binary acid to produce the unsaturated resin. It adopts stannous oxide, stannous salt or other stannous compound as catalyzer, added in effective quantity of catalyst. It largely reduces production cost and helps protect environment; besides, the new-type catalyzer can accelerate reaction velocity, able to be applied to the production of similar unsaturated resin.

Description

technical field [0001] The invention relates to a raw material and catalyst for unsaturated polyester resin production. Background technique [0002] Unsaturated polyester resin has a wide range of applications, especially as the main raw material for handicrafts, artificial stone, etc., and purified terephthalic acid (PTA) is the main raw material for the polyester industry, and its output at home and abroad is increasing day by day. Terephthalic acid, isophthalic acid, benzoic acid, etc., it is difficult to separate them one by one and the cost is high. Chinese patent CN 1073549C discloses a preparation method of terephthalic acid esters, which uses industrial p-xylene A large amount of by-products of terephthalic acid containing 50-60% of terephthalic acid, 5-10% of phthalic acid, 25-35% of benzoic acid and aliphatic monohydric alcohol and Esterification of polyalcohols to produce mixed terephthalic acid esters. Its products are used as plasticizers for polyvinyl chlori...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/52
Inventor 陈少岳李山川徐文宏蔡建明
Owner 陈少岳
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