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Preparation method of cashew nut oil modified waterborne acrylic acid modified alkyd resin dispersion

A water-based acrylic and alkyd resin technology, applied in coatings, primers, etc., can solve problems such as slow drying speed, complex synthesis process, and poor water resistance, and achieve fast drying speed, simple operation, and excellent product performance.

Active Publication Date: 2020-08-07
湘江涂料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The synthesis process is complicated and the drying speed is slow, and the water resistance is poor

Method used

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  • Preparation method of cashew nut oil modified waterborne acrylic acid modified alkyd resin dispersion
  • Preparation method of cashew nut oil modified waterborne acrylic acid modified alkyd resin dispersion

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0030] This embodiment includes the following steps:

[0031] (1) Synthesis of cashew nut oil phenolic resin: put 56.4g of phenol and 120g of cashew nut oil in a closed flask equipped with a thermometer, condensation separator and stirring device, add acidic catalyst sulfuric acid aqueous solution, and then add 70.5 g formaldehyde with a volume fraction of 37%, heated to 98-100°C, refluxed for 3 hours, and vacuum dehydrated to 130°C to obtain cashew oil modified phenolic resin;

[0032] (2) Synthesis of cashew oil modified alkyd resin prepolymer: put 640g of linseed oil and 135.2g of pentaerythritol in a closed flask equipped with a thermometer, condensation separator and stirring device, raise the temperature to 120°C, and add 0.384g LiOH, heat up to 240°C for alcoholysis, alcoholysis until the reaction solution (1 part of sample: 9 parts of 95% ethanol) is transparent, cool down to 100°C, add 251.4g of phthalic anhydride, add xylene to reflux, quickly heat up to 180°C for es...

Embodiment 2

[0035] This embodiment includes the following steps:

[0036](1) Synthesis of cashew nut oil phenolic resin: put 56.4g of phenol and 120g of cashew nut oil in a closed flask equipped with a thermometer, condensation separator and stirring device, add acidic catalyst sulfuric acid aqueous solution, and then add 70.5 Formaldehyde with a volume fraction of g of 37% is heated to 98-100°C, and after reflux for 3 hours, it is vacuum dehydrated to 130°C to obtain a cashew nut oil modified phenolic resin;

[0037] (2) Synthesis of cashew oil-modified alkyd resin prepolymer: 564g tall oleic acid, 160g trimethylolpropane, 48g neopentyl glycol and 152g hexahydrophthalic anhydride were placed in a thermometer, condensing water separator In a closed flask with a stirring device, the temperature was raised to 160°C for 1 hour of esterification, and then the temperature was raised to 250°C at a rate of 10°C per hour, kept at 250°C, esterified to an acid value of 8mgKOH / g, and cooled to 100°C...

Embodiment 3

[0040] This embodiment includes the following steps:

[0041] (1) Synthesis of cashew nut oil phenolic resin: put 56.4g of phenol and 120g of cashew nut oil in a closed flask equipped with a thermometer, condensation separator and stirring device, add an acid catalyst sulfuric acid aqueous solution, and then add 70.5g of Formaldehyde with a volume fraction of 37%, heated to 98-100°C, refluxed for 3 hours, vacuum dehydrated at 130°C, to obtain cashew nut oil modified phenolic resin;

[0042] (2) Synthesis of cashew oil-modified alkyd resin prepolymer: 335g soy oil, 86g trimethylolpropane, 95g neopentyl glycol, 21g maleic anhydride and 146g isophthalic acid were placed in a thermometer with a thermometer , condensing water separator and stirring device in a closed flask, the temperature was raised to 160°C for esterification for 1 hour, and then the temperature was raised to 250°C at a rate of 10°C per hour, kept at 250°C, esterified to an acid value of 8 mgKOH / g, and cooled to ...

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Abstract

The preparation method of the cashew nut oil modified waterborne acrylic acid modified alkyd resin dispersion comprises the following steps: (1) synthesizing cashew nut oil phenolic resin; (2) synthesizing a cashew nut oil modified alkyd resin prepolymer; and (3) synthesizing the acrylic acid modified alkyd resin. The method is simple to operate, the common drier in the field is added to catalyzeair drying, and the method has the characteristics of low drier consumption and high drying speed; the cashew nut oil modified phenolic resin is adopted to enhance the water resistance and salt sprayresistance of the resin, and the water resistance and salt spray resistance are superior to those of common air-drying water-based alkyd resin.

Description

technical field [0001] The invention relates to a preparation method of a water-based acrylic modified alkyd resin dispersion, in particular to a preparation method of a cashew oil-modified water-based acrylic modified alkyd resin dispersion. Background technique [0002] Waterborne self-drying alkyd resin has the characteristics of environmental protection and excellent cost performance. Coatings prepared from water-based alkyd resins can replace oil-based alkyd varnishes and enamels. It has a certain anti-corrosion and decorative effect on the basis of satisfying the drying performance of oily alkyd blend paint and enamel paint. Since the unmodified water-based alkyd resin is easy to hydrolyze the ester bond, it has poor storage stability and poor drying performance. Therefore, the current synthesis process of waterborne alkyd resin dispersion is based on modification to improve the storage stability, water resistance and drying performance of the resin. [0003] CN 106...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/01C08F283/00C08F220/14C08F220/06C08F212/08C08F220/18C08G63/49C08G63/78C08G8/32C08G8/10C09D151/08
CPCC08F283/01C08F283/002C08G63/48C08G63/78C08G8/32C08G8/10C09D151/08C09D5/002C08F220/1804C08F220/14C08F220/06C08F212/08C08F220/18
Inventor 张小燕陈文晖王曙光张谷良
Owner 湘江涂料科技有限公司
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