Method for degrading and recycling unsaturated polyester resin material

A polyester resin and unsaturated technology, which is applied in the field of degrading and recycling unsaturated polyester resin materials, can solve the problems of insufficient reactivity, high solvent cost, and high boiling point of solvents, and achieve low cost of degradation and recycling, low price, and low boiling point Effect

Active Publication Date: 2015-02-04
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above technologies can realize the degradation of unsaturated polyester, the cost of solvent is high, the reactivity is insufficient, and the boiling point of solvent is high, so it is not easy to recycle
These all limit its application in industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Zinc chloride and the acetic acid aqueous solution that acetic acid mass concentration is 90% are mixed to be made into the reaction solution that the catalyst content of 50g is 60%;

[0039] (2) Add 0.5g of the unsaturated polyester material synthesized by formula (1) into the reaction solution, heat to 100°C, and degrade for 72 hours;

[0040] (3) After the reaction and cooling, add 1000ml of acetone, filter, the filtered solid is the catalyst, and recover after drying; add 100ml of water to the filtrate, filter (the filter cake is a polymer containing styrene structural units, after analysis, where n=2), the filtered solid is dried and recovered; the filtrate is evaporated to dryness, acetone and acetic acid are recovered, and the filter cake is dried to obtain organic substances (mainly propylene glycol diacetate, phthalic acid).

Embodiment 2

[0042] (1) Magnesium chloride is mixed with the acetic acid aqueous solution that acetic acid mass concentration is 80% and is made into the reaction solution that the catalyst content of 50g is 50%;

[0043] (2) Add 5g of the unsaturated polyester material synthesized by formula (3) into the reaction solution, heat to 120°C, and degrade for 60 hours;

[0044] (3) After the reaction and cooling, add 800ml of tetrahydrofuran, filter, and the filtered solid catalyst is dried and recovered; add 200ml of water to the filtrate to analyze the degradation group containing polystyrene, filter, and dry and recover the filtered solid (polymers containing styrene structural units, after analysis, where n=1); the filtrate was evaporated to dryness, tetrahydrofuran and acetic acid were recovered, and the filter cake was dried to obtain organic substances (mainly propylene glycol diacetate, phthalic acid).

Embodiment 3

[0046] (1) Ferric chloride and the acetic acid aqueous solution that acetic acid mass concentration is 70% are mixed to be made into the reaction solution that the catalyst content of 50g is 30%;

[0047] (2) Add 25g of the unsaturated polyester material synthesized by formula (1) into the reaction solution, heat to 140°C, and degrade for 48 hours;

[0048](3) After the reaction and cooling, add 600ml of ethyl acetate, filter, the filtered solid is catalyst, and recover after drying; add 100ml of water to the filtrate to analyze the degradation group containing polystyrene, filter, and the filtered Solid drying recovery (polymer containing styrene structural units, after analysis, where n=2); dicarboxylic acid).

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PUM

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Abstract

The invention provides a method for degrading and recycling an unsaturated polyester resin material. The method comprises the following steps: preparing a reaction solution by a catalyst and a reaction solvent; mixing the reaction solution with an unsaturated polyester material to prepare an unsaturated polyester degrading system; heating the prepared unsaturated polyester degrading system for degradation; adding a separation solvent into the cooled unsaturated polyester degrading system; filtering to obtain solids, namely enhanced fibers and a catalyst; drying and sieving, and recycling; adding water into filtrate so as to separate out a polymer degrading component containing a styrene structure, and filtering; drying and recycling the filtered polymer solids containing the styrene structure; and evaporating filtrate to obtain substances mainly comprising resin degraded products which do not contain the styrene structure. The method for degrading and recycling the unsaturated polyester resin material has the advantages of low cost, moderate recycling conditions and high degrading activity.

Description

technical field [0001] The invention belongs to the field of material recycling, and in particular relates to a method for degrading and recycling unsaturated polyester resin materials. Background technique [0002] Unsaturated polyester resin is a typical thermosetting resin material. Thermosetting unsaturated polyester resin has excellent mechanical properties, electrical insulation properties and chemical corrosion resistance, and the processing technology is simple. It is one of the fastest-growing varieties of thermosetting resins. It is widely used in high-performance composite materials. A large amount of leftover waste remains in the production process of unsaturated polyester resin and its composite products, and considerable waste products will also be generated in the use process. How to convert these inert organic substances into valuable fine chemicals through a gentle and simple process , is an inevitable challenge facing our society. [0003] Both thermoset...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/16C07C67/08C07C51/087C07C63/16C07C63/24C07C43/23C07C41/03C07C55/14C07C51/00C08J11/10C08J11/18C08L67/06
CPCC07C41/18C07C51/09C07C67/08C08J11/10C08J11/18C08J2367/06C07C69/16C07C63/16C07C43/23C07C55/14C07C63/24Y02W30/62
Inventor 邓天昇王玉琪侯相林秦张峰
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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