Preparation method for transparent thixotropic unsaturated polyester resin

A polyester resin and unsaturated technology, which is applied in the field of preparation of unsaturated resin, can solve the problems such as the decrease of transparency, and achieve the effects of convenient preparation, excellent mechanical properties and convenient construction

Active Publication Date: 2014-11-26
CHANGZHOU HUARI NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And when the thickness of these thixotropic unsaturated polyester resins is greater than 0.8mm after curing, their transparency is significantly reduced.
When it is necessary to effectively protect special materials, a protective layer with a certain thickness is required without affecting its ornamental value. The existing thixotropic unsaturated polyester resin cannot meet this requirement

Method used

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  • Preparation method for transparent thixotropic unsaturated polyester resin
  • Preparation method for transparent thixotropic unsaturated polyester resin
  • Preparation method for transparent thixotropic unsaturated polyester resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (Example 1 Transparent thixotropic unsaturated polyester resin)

[0030] The specific steps of the preparation method of the transparent thixotropic unsaturated polyester resin of this embodiment are as follows:

[0031] (1) Add 1.0 mol of ethylene glycol, 2.2 mol of propylene glycol, 1.5 mol of phthalic anhydride, and 1.5 mol of maleic anhydride to a four-necked container equipped with nitrogen protection, agitator, thermometer and condensation fractionation device, and raise the temperature The polycondensation dehydration reaction is carried out at 190°C, and the acid value is less than 30mgKOH / g to produce resin A.

[0032] (2) Cool the resin A to 130° C., add 100 ppm hydroquinone with a mass of the total mass of the resin A, and add 25% hydroxyethyl methacrylate with a mass of the total mass of the resin A for dilution.

[0033] (3) After mixing uniformly, add 1.0% of the total mass of resin A fumed silica (model N20 fumed silica produced by Wacker Chemie AG), and disperse...

Embodiment 2

[0034] (Example 2 Transparent thixotropic unsaturated polyester resin)

[0035] The specific steps of the preparation method of the transparent thixotropic unsaturated polyester resin of this embodiment are as follows:

[0036] (1) Add 1.6 mol diethylene glycol, 1.6 mol dipropylene glycol, 1.0 mol phthalic anhydride, and 2.0 mol in a four-necked container equipped with nitrogen protection, agitator, thermometer and condensation fractionation device. Butenedioic acid is heated to 205°C for polycondensation dehydration reaction, and the acid value is less than 30mgKOH / g to produce resin A.

[0037] (2) Cool the resin A to 180° C., add 300 ppm hydroquinone with a mass of the total mass of the resin A, and add methyl methacrylate with a mass of 50% of the total mass of the resin A for dilution.

[0038] (3) After mixing uniformly, add 2.0% of the total mass of resin A fumed silica (type T40 fumed silica produced by Wacker Chemie AG), and disperse at high speed for 1 hour to obtain transpa...

Embodiment 3

[0039] (Example 3 Transparent thixotropic unsaturated polyester resin)

[0040] The specific steps of the preparation method of the transparent thixotropic unsaturated polyester resin of this embodiment are as follows:

[0041] (1) Add 1.6 mol of diethylene glycol, 1.6 mol of neopentyl glycol, 1.6 mol of tetrahydrophthalic anhydride, and 1.4 mol of transbutene into a four-necked container equipped with nitrogen protection, agitator, thermometer and condensation fractionation device The diacid is heated to 205°C for polycondensation dehydration reaction, and the acid value is less than 30mgKOH / g to produce resin A.

[0042] (2) Cool the resin A to 180° C., add 200 ppm hydroquinone with the total mass of the resin A, add 20% styrene and 5% hydroxypropyl acrylate with the total mass of the resin A for dilution.

[0043] (3) After mixing uniformly, add 0.5% of the total mass of resin A fumed silica (N20 fumed silica produced by Wacker Chemie AG) and disperse at a high speed for 0.8 hours ...

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Abstract

The invention relates to a preparation method for a transparent thixotropic unsaturated polyester resin and belongs to the technical field of organic high molecule compound preparation. The preparation method includes the following steps that (1) dihydric alcohol, saturated dicarboxylic acid or acid anhydride and unsaturated dicarboxylic acid or acid anhydride are added in a container, and a polycondensation dehydration reaction is performed to obtain a resin A; (2) acrylic ester or a methacrylic ester crosslinking monomer is added in the resin A; (3) after uniformly mixing, fumed silica is added, and a high-speed dispersion is performed; and styrene can be added in the resin A in the step (2). The transparent thixotropic unsaturated polyester resin has the advantages that the thixotropy and sag resistance are good, the appearance transparency of the resin and cured substances with any thickness is high, substrates can be fully protected, and patterns of the substrates can be clearly presented.

Description

Technical field [0001] The invention relates to a method for preparing an unsaturated resin, which belongs to the technical field of organic polymer compound preparation. Background technique [0002] Unsaturated polyester resin is a viscous liquid formed by polycondensation of dibasic acid or acid anhydride and dihydric alcohol into a crosslinking monomer (usually styrene). Its molecular structure contains Non-aromatic unsaturated double bond. The unsaturated polyester resin can be used to initiate a cross-linking reaction with an appropriate initiator and cured at room temperature to prepare a thermosetting plastic with a three-dimensional cross-linked structure. Unsaturated polyester resin has excellent mechanical properties, electrical properties and chemical corrosion resistance, and the molding process is simple. It has a wide range of applications in industry, agriculture, transportation, construction and defense industries. [0003] In recent years, the production volume ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/01C08F220/28C08F220/18C08F222/14C08F220/14C08F212/08C08G63/78C08G63/676C08G63/52C08K3/36
Inventor 孙雪峰薄高青宦胜民国岛和彦陈澄金迎霞
Owner CHANGZHOU HUARI NEW MATERIAL
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