Synthesis method of hyperbranched polyester

A technology of hyperbranched polyester and synthesis method, applied in the field of polymer chemistry, can solve the problems of difficulty in achieving better use effect, high cost, and reducing the surface effect of polyester resin.

Active Publication Date: 2018-11-20
ZHAOQING FUTIAN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the methods to reduce the volatility of unsaturated polyester resin mainly include: ① external film former method: by adding an external film former to unsaturated polyester resin to suppress the volatilization of styrene, but the film former will reduce the The surface effect of the resin, such as gloss, etc.; it needs secondary grinding and polishing to achieve a better surface effect
②Low styrene resin: This method is to reduce the amount of styrene by synthesizing low-viscosity unsaturated polyester, so as to reduce the volatilization of styrene; this method can reduce the volatilization of styrene to a certain extent, but it does not from fundamentally solve the problem
③ Low volatility monomer replacement method: use high boiling point unsaturated monomer as diluent to replace volatile styrene. Although this method can solve the volatility problem, the cost of this type of monomer is high and it is difficult to achieve a better Effect

Method used

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  • Synthesis method of hyperbranched polyester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1 - the first generation resin Hyb-201

[0037] In a 2L four-neck flask equipped with a thermometer, a mechanical stirrer, a nitrogen inlet tube and a reflux condenser, add 134.2g trimethylolpropane, 402.4g 2,2-dimethylolpropionic acid, and 26.8g xylene in sequence , 1.1g of p-toluenesulfonic acid and 0.7g of TPP triphenyl phosphite as an auxiliary agent, turn on mechanical stirring, heat up to 140°C for 1h under nitrogen protection, and keep warm for reaction until the acid value is lower than 20mgKOH / g, then cool down to 110°C, add 801.3g lauric acid, 40.1g xylene, 1.60g p-toluenesulfonic acid and 1.04g TPP triphenyl phosphite, heat up to 160°C for 1 hour, then gradually raise the temperature to 180°C for heat preservation reaction, the reaction When the acid value is 25-30mgKOH / g, cool down to 110°C, add 172.3g methacrylic acid, 8.6g xylene, 0.35g p-toluenesulfonic acid and 0.25g TPP triphenyl phosphite, heat up to 160°C for 1 hour , and gradually raise the ...

Embodiment 2

[0038] Embodiment 2-the first generation hyperbranched unsaturated polyester resin Hyb-111

[0039]In a 2L four-neck flask equipped with a thermometer, a mechanical stirrer, a nitrogen inlet tube and a reflux condenser, add 134.2g trimethylolpropane, 402.4g 2,2-dimethylol propionic acid, 26.8g di Toluene, 1.1g of p-toluenesulfonic acid and 0.7g of TPP triphenyl phosphite as an auxiliary agent, turn on the mechanical stirring, heat up to 160°C for 1h under the protection of nitrogen for reaction, keep the reaction until the acid value is lower than 20mgKOH / g, then lower the temperature When the temperature is lower than 140°C, add 400.6g lauric acid, 228.2g caprolactone, 31.5g xylene, 1.25g p-toluenesulfonic acid and 0.82g TPP triphenyl phosphite, heat up to 160°C for 1 hour, and gradually Heat up to 180°C for heat preservation reaction, react until the acid value is 25-30mgKOH / g, cool down to 110°C, add 172.3g of methacrylic acid, 8.6g of xylene, 0.35g of p-toluenesulfonic aci...

Embodiment 3

[0040] Embodiment 3-the first generation hyperbranched unsaturated polyester resin Hyb-321

[0041] In a 2L four-neck flask equipped with a thermometer, a mechanical stirrer, a nitrogen inlet tube and a reflux condenser, add 134.2g trimethylolpropane, 402.4g 2,2-dimethylolpropionic acid, and 26.8g xylene in sequence , 1.1g of p-toluenesulfonic acid and 0.7g of TPP triphenyl phosphite as an auxiliary agent, turn on mechanical stirring, heat up to 180°C for 1h under nitrogen protection, and keep warm for reaction until the acid value is lower than 20mgKOH / g, then cool down to 110°C, add 600.9g of lauric acid, 228.2g of caprolactone, 35.6g of xylene, 1.43g of p-toluenesulfonic acid and 0.93g of TPP triphenyl phosphite, raise the temperature to 160°C and keep it for 1h, then gradually raise the temperature to 180°C Carry out heat preservation reaction, react until the acid value is 25-30mgKOH / g, cool down to 110°C, add 72.1g of acrylic acid, 4.3g of xylene, 0.17g of p-toluenesulfo...

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Abstract

The invention provides a synthesis method of hyperbranched polyester. The synthesis method comprises the following steps: adding trimethylolpropane and 2,2-dimethylolpropionic acid and reacting untilan acid value is lower than 20 mgKOH/g; adding a first terminating monomer and reacting until an acid value is 25 to 30 mgKOH/g; and adding a second terminating monomer, reacting until an acid value is lower than 25 mgKOH/g and vacuumizing to obtain the hyperbranched polyester. The method disclosed by the invention can effectively control the reaction process; and meanwhile, the obtained product has higher compatibility with unsaturated polyester.

Description

technical field [0001] The invention belongs to the field of polymer chemistry, and in particular relates to a method for synthesizing a low-volatility, styrene-free unsaturated polyester resin. Background technique [0002] Unsaturated polyester resin refers to a linear polymer compound with ester bonds and unsaturated double bonds formed by polycondensation of unsaturated dibasic acid diols or saturated dibasic acid diols. Considering the cost of raw materials and the final performance of resin production, styrene is the most suitable diluent for unsaturated polyester resin; however, styrene is highly toxic and has multiple potential hazards, such as anesthesia and teratogenicity properties, etc., and styrene has a high saturated vapor pressure (853Pa / 25°C) at room temperature and is volatile. With the enhancement of people's awareness of environmental protection, the safety of production sites and the importance of clean production have received more and more attention f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/91C08G83/00
CPCC08G63/91C08G83/006
Inventor 陆志华郭灼荣符若文
Owner ZHAOQING FUTIAN CHEM IND
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