Alkyd resin for insulating paints and preparation method of alkyd resin

A technology of alkyd resin and insulating paint, applied in the field of resin, can solve the problems of large price increase and increase of resin cost, and achieve the effect of cost reduction, enhanced competitiveness and low price

Active Publication Date: 2011-04-13
山东奔腾漆业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since the beginning of this year, the prices of fatty acids, rosin, and phthalic anhydride, etc., have risen sharply, except for the price of glycerol, which is used in the preparation of alkyd resins. This has greatly increased the cost of resins

Method used

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  • Alkyd resin for insulating paints and preparation method of alkyd resin
  • Alkyd resin for insulating paints and preparation method of alkyd resin

Examples

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preparation example Construction

[0022] A kind of preparation method of alkyd resin for insulating varnish of the present invention comprises the following steps:

[0023] A. Primary esterification: put 21-29 parts of glycerin, 10-16 parts of stearic acid, 16-24 parts of oleic acid, 15-25 parts of crude terephthalic acid and 0.06-0.1 parts of hypophosphorous acid into the reactor, Close the feeding port, open the vent valve, start stirring at the same time as the temperature rises, heat up to 220-240°C for 2.5-3.5 hours, and control the sampling until the material is transparent;

[0024] Among them, crude terephthalic acid is the leftovers of producing purified terephthalic acid, that is, the pool material after washing. The price is very cheap at 4,200 yuan / ton, and the price of purified terephthalic acid is 8,500 yuan / ton. Use these raw materials The color of the produced resin is light, and the cost is greatly reduced. The meaning of central control refers to sampling and testing during the reaction proce...

Embodiment 1

[0035] Will be 22 parts of glycerin according to the ratio of parts by weight, 11 parts of stearic acid, 24 parts of oleic acid, 15 parts of crude terephthalic acid, plus 0.08 parts of hypophosphorous acid, drop into a stainless steel reaction kettle, seal Close the feeding port, open the vent valve, and start stirring when the temperature rises. When the temperature rises to 180°C, a large amount of water will be generated (pay attention to the expansion of the pot). Keep warm at 230-235°C for 3 hours, take a sample and control it. After the material is transparent, cool down to 200°C, add 21 parts of phthalic anhydride, 7 parts of benzoic acid, and an appropriate amount of reflux solvent. Raise the temperature to 195-205°C, keep warm until the acid value detected by the central control is below 10mgKOH / g, the Grignard viscosity is 14-18 seconds, and the reaction is over. Cool down to below 160°C, add xylene to adjust viscosity, filter and pack.

Embodiment 2

[0037] Put 22 parts of glycerin, 11 parts of stearic acid, 27 parts of oleic acid, 14 parts of crude terephthalic acid, and 0.1 parts of hypophosphorous acid into a stainless steel reaction kettle, keep it warm at 235 ° C, and after the material is transparent, Subsequent feeding ratio is: 19 parts of phthalic anhydride, 7 parts of benzoic acid, the process is the same as in Example 1.

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Abstract

The invention discloses an alkyd resin for insulating paints and a preparation method of the alkyd resin. The alkyd resin for insulating paints is prepared by esterfying the following raw materials in parts by weight: 21-29 parts of glycerol, 10-16 parts of stearic acid, 16-24 parts of oleic acid, 15-25 parts of crude terephthalic acid, 0.06-0.1 part of hypophosphorous acid, 10-21 parts of phthalic anhydride and 4-7 parts of benzoic acid. Under the condition of ensuring that the final product quality is not reduced compared with that of similar products, the production cost of the alkyd resin for insulating paints is significantly reduced.

Description

technical field [0001] The invention relates to a resin, in particular to an alkyd resin for insulating varnish. The present invention also relates to a preparation method of the above-mentioned alkyd resin for insulating varnish. Background technique [0002] There are many synthetic resins used for insulating paint, such as: phenolic resin, amino resin, epoxy resin, polyester resin, alkyd resin, silicone resin, etc. [0003] The alkyd resin of the present invention is a short-oil alkyd resin, which can be combined with amino resin to make a drying type insulating varnish. Usually the preparation method of this type of alkyd resin is: soybean oil or fatty acid (such as soybean oil acid, rapeseed acid, etc.) that is 35-45% by weight, more than 35% dibasic acid (such as phthalic anhydride, purified terephthalic acid, etc.) , 20-30% polybasic acid (such as glycerol or pentaerythritol, etc.), obtained through esterification. [0004] Since the beginning of this year, the pri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/49C09D167/08C09D5/25
Inventor 张庆忠
Owner 山东奔腾漆业股份有限公司
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