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Non-ionic self-emulsification solid epoxy resin and preparation method for emulsion thereof

A solid epoxy resin, non-ionic technology, used in epoxy resin coatings, coatings and other directions, can solve the problems of volatile organic compounds environmental pollution, harm to human health and other problems, achieve delicate appearance, energy saving, convenient operation Effect

Active Publication Date: 2008-09-10
中山大桥化工集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]At present, most epoxy coatings used are solvent-based coatings. During the curing and film-forming process of solvent-based epoxy resin coatings, a large amount of volatile Organic compounds (VOC) pollute the environment and endanger human health

Method used

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  • Non-ionic self-emulsification solid epoxy resin and preparation method for emulsion thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0096] in N 2 Under protection, weigh 15.0g epoxy resin E-51 (epoxy equivalent 190), add 100.0g PEG-8000 and MIBK20.0g, heat and stir, slowly raise the temperature to about 90°C, stir vigorously until clear, add catalyst A0.1 ~0.2g, slowly heat up to about 120°C, keep warm for 2~3h, stop N 2 , vacuum distilled until no fraction flows out. Add 150.0g of bisphenol A and 565.0g of E-51, stir evenly, then react at a constant temperature of about 160°C for 2-3 hours, cool down to about 80°C, and gradually add 830g of deionized water dropwise under high-speed stirring, and the dropwise addition is completed Afterwards, continue to stir for about 1 hour to discharge, and milky white water-based epoxy resin can be obtained, and its solid content is above 50%.

Embodiment 2

[0098] in N 2 Under protection, weigh 35.0g epoxy resin E-44 (epoxy equivalent 225) and add 100.0g PEG-4000 and MIBK20.0g, heat and stir, slowly raise the temperature to about 90°C, stir vigorously until clear, add catalyst A0.2 ~0.4g, slowly heat up to about 120°C, keep warm for 2~3h, stop N 2 , vacuum distilled until no fraction flows out. Add 300g of bisphenol A and 50.0g of E-5110, stir evenly, add 1.0g of catalyst B, then react at a constant temperature of about 160°C for 2-3 hours, cool down to about 80°C, gradually add 1400g of deionized water dropwise under high-speed stirring, drop After the addition is completed, continue to stir for about 1 hour to discharge, and then milky white water-based epoxy resin can be obtained, with a solid content of more than 50%.

Embodiment 3

[0100] in N 2 Under protection, weigh 5.2g of epoxy resin shell 828 (epoxy equivalent 195), add 54.8g of PEG-8000 and MIBK4g, heat and stir, slowly raise the temperature to about 90°C, stir vigorously until clear, add catalyst A0.1~0.2g , slowly raise the temperature to about 120°C, keep it warm for 2-3 hours, stop N 2 , vacuum distilled until no fraction flows out. Add 72.5g of bisphenol A and 267.7g of Shell 828, stir evenly, add 0.6g of catalyst B, then react at a constant temperature of about 160°C for 2-3 hours, cool down to about 80°C, and gradually add 400.0g of deionized under high-speed stirring Water, after the dropwise addition is completed, continue to stir for about 1 hour to discharge the material, and a milky white water-based epoxy resin can be obtained with a solid content of more than 50%.

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Abstract

The invention relates to a non-ionic self-emulsifying solid epoxy resin and a preparation method of the emulsion of the resin, belonging to the coating material chemical manufacturing industry. The preparation method adopts a 'two-step method' principle during preparation: step one: under the protection of nitrogen, the reaction of 5 to 25 percent of low-molecular weight epoxy resin, 40 to 70 percent of polyether alcohol, 1 to 10 percent of solvent and 0.01 to 0.1 percent of catalyst is carried out at 90 to 150 DEG C, and then a constant temperature is kept for 2 to 7 hours before intermediate is obtained through the vacuum distillation of the solvent; step two: 10 to 25 percent of intermediate, 40 to 70 percent of low-molecular weight epoxy resin, 5 to 25 percent of bisphenol A and 0.02 to 0.1 percent of catalyst are heated up to 120 to 180 DEG C, and then a constant temperature is kept for 1 to 3 hours before non-ionic self-emulsifying solid epoxy resin with medium molecular weight and high molecular weight is obtained; and finally, at the temperature of 20 to 90 DEG C, distilled water is dripped in to dilute the solution to a degree with solid content ranging between 30 and 80 percent of through violent stirring, thereby obtaining non-ionic self-emulsifying solid epoxy resin emulsion. The preparation method has convenient operation, stable manufacturing technique, energy conservation and moderate preparation process. Moreover, the water-based epoxy emulsion is exquisite and has uniform particle diameter and high product quality.

Description

【Technical field】 [0001] The invention relates to a water-based epoxy paint cured at room temperature and a preparation method thereof, in particular to a nonionic self-emulsifying solid epoxy resin and a preparation method of an emulsion thereof, belonging to the paint chemical manufacturing industry. 【Background technique】 [0002] Epoxy resin is used as the main film-forming material of coatings because it has excellent adhesion to various substrates, stability, chemical resistance, insulation and mechanical strength. Therefore, about 30-40% of epoxy resin is processed into various coatings every year, which are widely used in ships, steel structures, automobiles, civil engineering, household appliances, and electromechanical industries. [0003] Most of the epoxy coatings currently used are solvent-based coatings. During the curing and film-forming process of solvent-based epoxy coatings, due to the volatilization of solvents, a large amount of volatile organic compounds...

Claims

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Application Information

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IPC IPC(8): C08G59/14C09D163/00
Inventor 刘晓芳夏必来周俐珍郑化魏铭邱继会
Owner 中山大桥化工集团有限公司
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