A kind of preparation method of alkyd resin emulsion

An alkyd resin emulsion and acid anhydride technology, used in coatings, polyester coatings, etc., can solve problems such as performance improvement obstacles, difficulty in obtaining small particle size resin emulsions, etc., and achieve excellent water resistance and salt spray resistance. low diameter effect

Active Publication Date: 2022-06-14
湖南林特科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to obtain a resin emulsion with a small particle size by emulsifying the resin with an inactive surfactant, which hinders performance improvement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0034] Preparation of modified epoxy emulsifier:

[0035] Add 100kg of epoxy resin E20, 20kg of stearic acid, and triphenylphosphine into the reaction kettle, react at 120°C for 5h, and when the acid value is lower than 2mg KOH / g, add 19.5kg of meglumine, 0.1kg of dimethylethanolamine, 120 ℃ of reaction for 5h, cooling, discharging for standby, cooling, to obtain the modified epoxy emulsifier.

Embodiment 1

[0041] The preparation method of a kind of alkyd resin emulsion of the present invention comprises the following steps:

[0042] 1) Synthesis of alkyd resin: add 50kg of unsaturated fatty acid linoleic acid, 10kg of trimethylolpropane, 5kg of maleic anhydride, and 0.2kg of organic tin catalyst into the reaction kettle, heat up to 180°C for reaction for 2h, and then heat up to 200°C for reaction For 2 hours, the temperature was finally raised to 230 °C for reaction for 2 hours. When the acid value was lower than 50 mg KOH / g, the temperature was lowered to 120 °C, and 10 kg of vinyl silicone oil with a viscosity of 100 cps and 0.1 kg of oily initiator BPO were added, and the reaction was carried out for 4 hours;

[0043] 2) preparation of alkyd resin emulsion: after the above-mentioned reaction is completed, the system temperature is lowered to 80 ° C, 2 kg of synthetic modified epoxy emulsifiers, 1 kg of cucurbituril are added, and the stirring is continued for 30 min. When cool...

Embodiment 2

[0045] The preparation method of a kind of alkyd resin emulsion of the present invention comprises the following steps:

[0046] 1) Synthesis of alkyd resin: add 50kg of unsaturated fatty acid linoleic acid, 10kg of trimethylolpropane, 5kg of maleic anhydride, and 0.2kg of organic tin catalyst into the reaction kettle, heat up to 180°C for reaction for 2h, and then heat up to 200°C for reaction 2h, the temperature was finally raised to 230°C for 2h, and the temperature was lowered to 120°C when the acid value was lower than 50mg KOH / g;

[0047]2) preparation of alkyd resin emulsion: after above-mentioned reaction is completed, system temperature is lowered to 80 ℃, adds modified epoxy emulsifier 2kg, cucurbituril 1kg, continues stirring 30min, when cooling to below 60 ℃, adds ammoniacal liquor 1kg, 20kg of water, dispersed for 30min, and discharged.

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PUM

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Abstract

The invention discloses a preparation method of alkyd resin emulsion, which comprises the following steps: S1. Synthesis of alkyd resin: adding unsaturated fatty acid, polyhydroxy compound, acid anhydride, and esterification catalyst into a reaction kettle, and raising the temperature to a predetermined temperature for reaction , when the acid value is lower than the set value, cool down, add vinyl silicone oil, oily initiator, and react for a predetermined time; S2. Preparation of alkyd resin emulsion: cool down the reaction system obtained in step S1, add modified epoxy emulsifier, Cucurbituril and organic amine are continuously stirred, added with water, dispersed evenly, and discharged to obtain the alkyd resin emulsion. In the synthesis process of alkyd resin, vinyl silicone oil is used to modify alkyd resin, and polysiloxane segments with high weather resistance and low surface energy are introduced, so that alkyd resin has the weather resistance, stain resistance and resistance of silicone resin. Excellent performance in salt spray.

Description

technical field [0001] The invention belongs to the field of alkyd resin coatings, and relates to a preparation method of an alkyd resin emulsion. Background technique [0002] Coatings are necessary materials for daily production and protection of infrastructure, and are widely used in construction and industrial fields. Now the widely used coatings mainly include epoxy resin water / oil paint, acrylic water / oil paint, polyurethane water / oil paint, alkyd water / oil paint. Among them, alkyd resin coatings play a very important role in the field of coatings due to their cheap and readily available raw materials, good film adhesion, high fullness and brightness, good wetting of pigments, and good workability. Due to its specific molecular structure, alkyd resin coatings generally have the problems of general hydrolysis resistance, poor salt spray resistance and poor antifouling performance. [0003] The molecular structure of alkyd resin is diverse, which contains characteristi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/03C08G63/91C08G63/49C08G77/445C09D167/08C09D183/10C08L67/08C08L83/10
CPCC08J3/03C08G63/918C08G63/48C08G77/445C09D167/08C09D183/10C08J2367/08C08J2383/10
Inventor 阳习春刘小林蒋哲明易添福叶武龙周磊
Owner 湖南林特科技有限公司
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