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Dicyclopentadiene type unsaturated polyester modified by tung oil, and preparation method and application thereof

A dicyclopentadiene and unsaturated technology, which is applied in the field of preparation of new polymer materials, can solve the problems of unsaturated polyester coatings that cannot meet the requirements of use, poor air drying, poor toughness, etc., and achieve easy industrial The effect of expanding production, simple process and easy operation

Inactive Publication Date: 2011-07-06
山东中洋新创复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the disadvantages of existing general-purpose unsaturated polyesters, which rely on petrochemical raw materials for a long time, and have poor toughness, refractory degradation, and poor air-drying properties, which cannot meet the requirements for the use of unsaturated polyester coatings.

Method used

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  • Dicyclopentadiene type unsaturated polyester modified by tung oil, and preparation method and application thereof
  • Dicyclopentadiene type unsaturated polyester modified by tung oil, and preparation method and application thereof
  • Dicyclopentadiene type unsaturated polyester modified by tung oil, and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0047] Put 30g (0.3mol) of maleic anhydride, 40g (0.3mol) of dicyclopentadiene and 0.7g of phosphoric acid into a four-necked flask device with a reflux condenser, raise the temperature to 80-100°C with a protective gas, and add 5.4 g (0.3mol) of water, the temperature of the control system is lower than 140°C; after adding the water, keep it warm for 1.5-2h to obtain dicyclopentadiene maleic acid half ester. Then add 22.8g (0.3mol) propylene glycol, 21.2g (0.2mol) diethylene glycol, 7.4g (0.05mol) phthalic anhydride, 29g (0.25mol) fumaric acid and 0.09g terephthalic acid Diphenol, install a fractionation column and a water separator on a four-neck flask, raise the temperature to 150°C, heat up to 190-210°C for dehydration and esterification after 0.5-1h of heat preservation, and control the temperature of the fractionation column to ≤105°C to reduce the low boiling point loss of diols. When the acid value reaches about 70mgKOH / g, cool down to 140°C and add 5g of tung oil, th...

Embodiment 2

[0049] The add-on of tung oil is increased to 10g, and other is with embodiment 1 (omitted). The final acid value was 22.4 mgKOH / g, the viscosity was 1328 mPa·s, and the number average molecular weight was 1100.

Embodiment 3

[0051] The add-on of tung oil is increased to 15g, and other is with embodiment 1 (omitted). The final acid value was 29.7 mgKOH / g, the viscosity was 1315 mPa·s, and the number average molecular weight was 1100.

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Abstract

The invention discloses a dicyclopentadiene type unsaturated polyester modified by tung oil, and a preparation method and application thereof. The method comprises the following steps: reacting raw materials maleic anhydride and dicyclopentadiene under the action of a catalyst to obtain dicyclopentadiene semi-maleate; adding dihydric alcohol, dibasic acid and polymerization inhibitor, and heatingto 190-210 DEG C for dehydration and esterification; when the acid value reaches 50-120 mg KOH / g, cooling to 120-180 DEG C, adding a certain amount of tung oil, and heating to 200-210 DEG C to continue the reaction; and after the acid value reaches 20-35 mg KOH / g under the action of esterification, cooling to 100-120 DEG C, diluting with styrene dissolved with a small amount of polymerization inhibitor, and uniformly dispersing to obtain the product. The dicyclopentadiene type unsaturated polyester modified by tung oil according to the method has the advantages of favorable air-drying property, aging resistance, biodegradability and the like. The product is suitable to be used as an unsaturated polyester paint for corrosion protection, insulation and binding.

Description

technical field [0001] The invention belongs to a preparation method of new high molecular polymer materials, in particular to a preparation method of tung oil modified dicyclopentadiene type unsaturated polyester resin. The resin prepared by the method can be used in industries such as unsaturated polyester coatings. Background technique [0002] Polymer materials have a huge impact on human production and life. At present, its synthetic raw materials mainly depend on petroleum. However, the oil reserves on earth are only enough for a few decades at most. In order to find resources that can replace petroleum and protect the environment, it is wise to develop renewable resources. Vegetable oil is one of these resources. Due to its abundant reserves, biodegradability, and abundant chemically modifiable functional groups in its structure, more and more literatures have reported the use of vegetable oils to modify polymer materials. Among them, the unsaturated polyester (U...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/91C08G63/52C09D167/06C09K3/00H01B3/42C09J167/06
Inventor 周永红刘承果刘红军杨晓慧崔竞方
Owner 山东中洋新创复合材料有限公司
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