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Preparation method of alkyd resin emulsion

A technology of alkyd resin emulsion and acid anhydride, which can be used in coatings, polyester coatings, etc. It can solve the problems of performance improvement and difficulty in obtaining resin emulsions with small particle sizes, and achieve excellent water and salt spray resistance, appropriate viscosity, and particle size. low diameter effect

Active Publication Date: 2021-04-30
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]The epoxy resin E20 100 kg, 20 kg, triphenylphosphine is added to the reaction kettle, and the acid value is below 2 mg of KOH / g at 120 ° C, adding gluus 19.5 kg, dimethyde ethanolamine 0.1 kg, Reaction at 120 ° C for 5 hours, cooling, disconnection, cooling, and then modified epoxy emulsifier.

Embodiment 1

[0041]A method of preparation of an alkyd resin emulsion of the present invention includes the following steps:

[0042]1) Synthesis of alkyd resin: 50 kg of unsaturated fatty acid is 50 kg, trimethylmethylpropane 10 kg, die anhydride 5 kg, and an organom tin catalyst is added to the reactor, and the temperature is increased to 180 ° C for 2 h, and then temperature rise to 200 ° C. 2H, the last temperature rose to 230 ° C for 2 h, and the acid value was less than 50 mg KOH / g, and the viscosity was 100 cps of vinyl silicone 10 kg, oily initiator BPO 0.1 kg, reaction 4h;

[0043]2) Preparation of alkyd resin emulsion: After the reaction is completed, the system temperature drops to 80 ° C, adding synthetic modified epoxy emulsifier 2 kg, cucurbit 1 kg, continuously stirred for 30min, cooling to 60 ° C, add DMEA 0.1kg, 20 kg of water, 30 min, discharge.

Embodiment 2

[0045]A method of preparation of an alkyd resin emulsion of the present invention includes the following steps:

[0046]1) Synthesis of alkyd resin: 50 kg of unsaturated fatty acid is 50 kg, trimethylmethylpropane 10 kg, die anhydride 5 kg, and an organom tin catalyst is added to the reactor, and the temperature is increased to 180 ° C for 2 h, and then temperature rise to 200 ° C. 2H, the last temperature rose to 230 ° C for 2 h, and the acid value was less than 50 mg KOH / g to cool down to 120 ° C;

[0047]2) Preparation of alkyd resin emulsion: After the reaction is completed, the system temperature drops to 80 ° C, adding modified epoxy emulsifier 2 kg, cucurbiture 1 kg, continuously stirred for 30min, cooling to 60 ° C, adding ammonia water 1 kg, Water 20kg, dispersion 30 min, discharge.

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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, a polyhydroxy compound, acid anhydride and an esterification catalyst into a reaction kettle, heating to a preset temperature for reaction, cooling when the acid value is lower than a set value, adding vinyl silicone oil and an oily initiator, and reacting for preset time; and S2, preparation of alkyd resin emulsion: cooling the reaction system obtained in the step S1, adding the modified epoxy emulsifier, cucurbituril and organic amine, continuously stirring, adding water, uniformly dispersing, and discharging to obtain the alkyd resin emulsion. In the synthesis process of the alkyd resin, vinyl silicone oil is used for modifying the alkyd resin, and a polysiloxane chain segment with high weather resistance and low surface energy is introduced, so that the alkyd resin has excellent weather resistance, stain resistance and salt spray resistance of organic silicon resin.

Description

Technical field[0001]The present invention belongs to the field of alkyd resin coatings, and is related to the preparation method of alkyd resin emulsion.Background technique[0002]Coatings are required for daily production protection infrastructure, which is widely used in architecture and industrial fields. Now there is a wide range of coatings, mainly epoxy water / oily coatings, acrylic water / oily coatings, polyurethane water / oily coatings, alkyd water / oily coatings. The alkyd resin coating is good because the raw materials are cheap, the coating film is adhered, the brightness is high, and the pigment is good, and good construction is played in the field of paint, but the traditional As its specific molecular structure, alkyd resin coatings generally have a problem of water-resistant performance, poor salt-tolerant fog performance and poor anti-fouling performance.[0003]The alkyd resin molecular structure is diversified in which a characteristic reaction group such as a hy...

Claims

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Application Information

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Patent Type & Authority Applications(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欧阳湘易添福叶武龙周磊
Owner 湖南林特科技有限公司
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