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Epoxy-modified waterborne alkyd resin and preparation method thereof

A water-based alkyd resin and epoxy modification technology, which is applied in the chemical industry, can solve the problems of cumbersome process and complicated preparation method of water-based alkyd resin, and achieve the effects of simple synthesis process, shortened hard-drying time, and improved stability

Active Publication Date: 2016-04-20
BEIJING JINZHIQIAO TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method of the modified water-based alkyd resin in Comparative Document 1 and Comparative Document 2 is complicated and the process is cumbersome

Method used

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  • Epoxy-modified waterborne alkyd resin and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0029] (1) Add tall oil acid 20g, abietic acid 4g, e20 epoxy resin 6g, neopentyl glycol 4g, trimethylolpropane 8g, pentaerythritol 5g, polyether N2102g, phthalic anhydride 10g in the reaction kettle , maleic anhydride 2g, xylene 5g, the temperature rises to 70-80°C and starts to stir. When the temperature rises to 140°C, slowly raise the temperature and keep rising 10°C per hour. When the temperature rises to 210°C, keep it warm for 2 hours. , start to measure the acid value of the reaction solution, take a sample every 1h to measure the acid value, when the acid value is below 13, take a sample every 0.5h to measure the acid value, and immediately cool down when the acid value is 10-11mgKOH / g;

[0030] (2) Cool down to 170-180°C, add 6g of trimellitic anhydride, pass in nitrogen, raise the temperature to 170±2°C, quickly cool down when the acid value reaches 43-48mgKOH / g, cool down to below 160°C, add ethylene glycol monobutyl ether 9g; below 120°C, add 9g of n-butanol; below...

Embodiment 2

[0032] (1) Add tall oil acid 22g, abietic acid 4g, e20 epoxy resin 6g, neopentyl glycol 4g, trimethylolpropane 8g, pentaerythritol 5g, polyether N2102g, phthalic anhydride 10g in the reaction kettle , maleic anhydride 2g, xylene 5g, the temperature rises to 70-80°C and starts to stir. When the temperature rises to 140°C, slowly raise the temperature and keep rising 10°C per hour. When the temperature rises to 210°C, keep it warm for 2 hours. , start to measure the acid value of the reaction solution, take a sample every 1h to measure the acid value, when the acid value is below 13, take a sample every 0.5h to measure the acid value, and immediately cool down when the acid value is 10-11mgKOH / g;

[0033] (2) Cool down to 170-180°C, add 6g of trimellitic anhydride, pass in nitrogen, raise the temperature to 170±2°C, quickly cool down when the acid value reaches 43-48mgKOH / g, cool down to below 160°C, add ethylene glycol monobutyl ether 9g; below 120°C, add 9g of n-butanol; below...

Embodiment 3

[0035] (1) Add tall oil acid 23g, abietic acid 4g, e20 epoxy resin 6g, neopentyl glycol 4g, trimethylolpropane 8g, pentaerythritol 5g, polyether N2102g, phthalic anhydride 10g in the reaction kettle , maleic anhydride 2g, xylene 5g, the temperature rises to 70-80°C and starts to stir. When the temperature rises to 140°C, slowly raise the temperature and keep rising 10°C per hour. When the temperature rises to 210°C, keep it warm for 2 hours. , start to measure the acid value of the reaction solution, take a sample every 1h to measure the acid value, when the acid value is below 13, take a sample every 0.5h to measure the acid value, and immediately cool down when the acid value is 10-11mgKOH / g;

[0036] (2) Cool down to 170-180°C, add 6g of trimellitic anhydride, pass in nitrogen, raise the temperature to 170±2°C, quickly cool down when the acid value reaches 43-48mgKOH / g, cool down to below 160°C, add ethylene glycol monobutyl ether 9g; below 120°C, add 9g of n-butanol; below...

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Abstract

The invention discloses epoxy-modified waterborne alkyd resin and a preparation method thereof. The preparation method comprises the steps of synthesizing of epoxy-modified alkyd resin, wherein organic monobasic fatty acid, organic monobasic aromatic acid, organic acid anhydride, organic polyalcohol, epoxy resin and xylene are stirred when the temperature is increased to 70 DEG C-80 DEG C, reacting under heat preservation is performed when the temperature is increased to 210 DEG C, and the temperature is lowered at once when the acid value is 10-11 mgKOH / g; water bearing of the epoxy-modified alkyd resin, wherein 5-7 parts by mass of trimellitic anhydride is added and inert gas is introduced when the temperature is lowered to 170 DEG C-180 DEG C, the temperature is increased to 170+ / -2 DEG C, the temperature is quickly lowered when the acid value reaches 43-48 mgKOH / g, first solvent, second solvent and third solvent are sequentially added in the temperature lowering process, and then the epoxy-modified waterborne alkyd resin is obtained. According to the epoxy-modified waterborne alkyd resin, the stability is high, the epoxy-modified alkyd resin is synthesized through a one-step method and then processed through water bearing, and the synthesis technology is simplified.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to a water-based alkyd resin, in particular to an epoxy-modified water-based alkyd resin and a preparation method thereof. Background technique [0002] In recent years, due to the gradual enhancement of people's awareness of environmental protection, systems containing no or less volatile organic compounds (VOC) and no harmful air pollutants (HAP) have become the development direction of new materials. Therefore, the development of water-based resins has been paid more and more attention by people. At present, the more successful varieties mainly include: water-based acrylic resins, water-based alkyd resins, and water-based epoxy ester resins. [0003] Water-based alkyd resin is a high-acid value low-viscosity resin formed by esterification and polycondensation of polyols, polybasic acids and vegetable oils (acids) or other fatty acids. It uses aromatic polyester as the main chain an...

Claims

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Application Information

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IPC IPC(8): C08G63/49C08G63/91
CPCC08G63/48C08G63/91
Inventor 苏同苏守梅苏子涵
Owner BEIJING JINZHIQIAO TECH DEV CO LTD
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