Ultraviolet curing itaconic acid-based polyester resin and preparation method thereof

An itaconic acid-based, polyester resin technology, applied in polyester coatings, coatings, etc., can solve the problems of low production efficiency, high cost and complexity of itaconic acid-based resin, and achieve the effect of easy polishing

Active Publication Date: 2021-11-19
ZHAOQING FUTIAN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reflux polymerization method needs to add solvent with water, and the production process is not environmentally friendly; the low-temperature polymerization method has low reactivity of the carboxyl group of itaconic acid, and needs to add epoxy resin or active monomer to react, resulting in high synthesis cost and low production efficiency; decompression The polymerization method needs to vacuumize the reaction environment, which consumes high energy and requires high equipment requirements; in short, the cost of synthesizing light-curing itaconic acid-based resins with these synthetic methods is relatively high and relatively complicated

Method used

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  • Ultraviolet curing itaconic acid-based polyester resin and preparation method thereof
  • Ultraviolet curing itaconic acid-based polyester resin and preparation method thereof
  • Ultraviolet curing itaconic acid-based polyester resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The UV-curable itaconic acid-based resin of the present invention is synthesized in one step by melt polymerization;

[0024] 1. First, synthesize UV-curable itaconic acid-based resin, which is made of the following raw materials in weight ratio:

[0025]

[0026] 2. Preparation method:

[0027] Drop into 52g diethylene glycol, 10.5g maleic anhydride, 17.5g phthalic anhydride, 19.3g itaconic acid and 0.22g p-toluenesulfonic acid, 0.02g hydroquinone, 0.4g hypophosphorous acid in the four-necked flask according to the formula design amount, Install a four-necked flask, a mechanical stirrer and a reflux condenser on the heating mantle, and feed it into a 10-20m 3 / h flow rate of nitrogen protection, heating to 145°C and keeping it warm for 0.5 hours, then raising the temperature to about 160°C for 2 hours, and finally raising the temperature to 168-170°C to react until the acid value Av<25mgKOH / g is detected, that is At the end of the reaction, after cooling down to b...

Embodiment 2

[0030] The UV-curable itaconic acid-based resin of the present invention has the same formula as in Example 1, and is synthesized in two steps by melt polymerization;

[0031] 1. First, synthesize UV-curable itaconic acid-based resin, which is made of the following raw materials in weight ratio:

[0032]

[0033]

[0034] 2. Preparation method:

[0035]Step 1: Put 52g of diethylene glycol, 10.5g of maleic anhydride, 17.5g of phthalic anhydride and 0.02g of hydroquinone into a four-necked flask according to the amount designed in the formula, and install a four-necked flask, a mechanical stirrer and reflux condensation on the heating mantle The tube is fed with nitrogen protection at a flow rate of 10-20m3 / h, heated to 150°C and then raised to 200-210°C at a rate of 20°C / h and kept for 1h.

[0036] Step 2: Cool down to 120°C, add 19.3g of itaconic acid, 0.22g of p-toluenesulfonic acid, and 0.4g of hypophosphorous acid under the protection of nitrogen gas, quickly raise t...

Embodiment 3

[0039] The UV-curable itaconic acid-based resin of the present invention is synthesized in one step by melt polymerization;

[0040] 1. First, synthesize UV-curable itaconic acid-based resin, which is made of the following raw materials in weight ratio:

[0041]

[0042] 2. Preparation method:

[0043] Put 37.5g of diethylene glycol, 11.36g of ethylene glycol, 11.36g of maleic anhydride, 16.8g of phthalic anhydride, 22.16g of itaconic acid, 0.4g of p-toluenesulfonic acid, and 0.02g of hydroquinone in a four-necked flask according to the formula design , 0.34g hypophosphorous acid, install a four-necked flask, a mechanical stirrer and a reflux condenser on the heating mantle, feed nitrogen protection with a flow rate of 10-20m3 / h, heat up to about 145°C and keep it warm for 0.5 hours, then heat up to React at 160°C for 2 hours, and finally raise the temperature to 168-170°C to react until the acid value Av<25mgKOH / g is detected, which is the end of the reaction. After cooli...

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Abstract

The invention discloses an ultraviolet curing itaconic acid-based polyester resin. The resin comprises, by weight, 48.86-52% of micromolecular polyhydric alcohols; 19.3-22.16% of itaconic acid; 28%-28.16% of binary acid; 0.22-0.4% of a catalyst; 0.02% of a first polymerization inhibitor; and 0.06% of a second polymerization inhibitor and 0.34-0.4% of an antioxidant. The invention also discloses a preparation method of the ultraviolet curing itaconic acid-based polyester resin. The itaconic acid-based polyester resin is synthesized by adopting a melt polymerization method, which can be a one-step method or a two-step method. The ultraviolet curing itaconic acid-based polyester resin provided by the invention overcomes the defects of poor surface dryness, difficulty in polishing and the like of unsaturated polyester resin in photocuring application, especially in application of photocuring wood primer, can completely replace a part of common photocuring resin such as polyester acrylate to be applied to the photocuring wood primer, and can also be widely applied to the fields of stone coatings, wood primer finish, plastic paint, ink paper glazing and the like.

Description

technical field [0001] The invention relates to the field of polymer material chemical industry, in particular to an ultraviolet light curing itaconic acid-based polyester resin and a preparation method thereof. Background technique [0002] With the advancement of science and technology and the development of industry, environmental problems have become more prominent, and the international community has paid more and more attention to environmental problems. In this context, UV curing, as a new curing technology with outstanding advantages such as energy saving, high efficiency, environmental friendliness, low VOC emission and low price, has gradually entered people's field of vision and become a main direction of future curing technology development. . [0003] Light-curing wood primer is the most common and most commonly used light-curing coating. At present, polyester acrylate and epoxy acrylate are mainly used together. This combination is mainly used when polyester a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/676C09D167/06
CPCC08G63/676C09D167/06
Inventor 戴开良罗志成余桐柏金小楸
Owner ZHAOQING FUTIAN CHEM IND
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