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Synthetic method for tri-functionality water-soluble epoxy resin

A technology of epoxy resin and synthesis method, which is applied in the field of synthesis of water-soluble epoxy resin, can solve the problems of low epoxy value of liquid epoxy resin, not water-based epoxy resin, large amount of waste water, etc., and achieve environmental pollution, The effect of low epoxy equivalent and easy industrialization

Active Publication Date: 2015-07-22
JUSHI GRP CO
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Problems solved by technology

[0007] Chinese patent CN102040568A discloses a method for synthesizing low-molecular-weight epoxy resins. Nano potassium carbonate is used to replace industrial potassium carbonate and sodium hydroxide to solve the problem of low epoxy value, high viscosity, and high viscosity of liquid epoxy resins produced by existing synthesis processes. And problems such as the large amount of wastewater in the synthesis process, the epoxy equivalent is less than 170
[0008] Chinese patents CN200410027818.9, CN200510030679.X, CN200710059668.3 disclose several preparation methods of water-based epoxy resins, but they all disperse epoxy resin in aqueous solution to prepare epoxy resin emulsion, not real water-based epoxy resins

Method used

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  • Synthetic method for tri-functionality water-soluble epoxy resin

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Embodiment 1

[0025] Put 69.1g (.75mol) of glycerol into a four-necked flask, raise the temperature to 57°C, add 0.7g of catalyst (0.3g of boron trifluoride and 0.4g of titanium tetrachloride), and slowly add 208.2g of epoxy resin dropwise under stirring. Chloropropane, drop it in 4 hours, and react for 3 hours after the drop. Add 150g of absolute ethanol, raise the temperature to 30°C, stir to dissolve, take 60g of NaOH and add it to the reaction bottle six times, add once every half an hour, react for 4 hours after the addition, let stand for 8 hours, filter with suction, and use 20g NaOH Wash with water and ethanol, combine the filtrates, distill under reduced pressure, and remove residual NaCl by suction filtration to obtain a trifunctional water-soluble epoxy resin, which is soluble in water and can be diluted with water in any proportion. According to GB4612-84, the prepared epoxy resin has an epoxy equivalent of 87, that is, an epoxy value of 1.15.

Embodiment 2-4

[0027] Adopt different formulas, operating method is identical with embodiment 1, the formula of each embodiment and the property of the waterborne epoxy resin that makes are shown in Table 1:

[0028] Table 1

[0029]

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Abstract

A synthetic method for a tri-functionality water-soluble epoxy resin is disclosed by the invention, and comprises: taking glycerol and chloropropylene oxide as raw materials, carrying out a ring-opening reaction at a temperature of 50-60 DEG C in the presence of nitrogen and a composite catalyst of boron trifluoride and titanium tetrachloride, after reacting completely, adding anhydrous alcohol to dissolve, then adding sodium hydroxide at a temperature of 25-35 DEG C to carry out a ring-closing reaction, after reacting completely, leaving to stand for 6-8 h, treating the reaction liquid and getting the tri-functionality water-soluble epoxy resin; and the mass ratio of boron trifluoride to titanium tetrachloride is 1-3:2-5 in the composite catalyst of boron trifluoride and titanium tetrachloride. The synthetic method provided by the invention is simple in technology and easy to industrialized, and has no pollution to environment and no flammable and explosive dangers.

Description

(1) Technical field [0001] The invention relates to a method for synthesizing a water-soluble epoxy resin, in particular to a method for synthesizing a water-soluble epoxy resin with trifunctionality and low epoxy equivalent. (2) Background technology [0002] Epoxy resins are widely used in many fields such as electrical and electronic insulation materials, coatings, adhesives, and composite materials. As one of the varieties of epoxy resins, water-soluble epoxy resins with multifunctionality and low epoxy equivalent can be used as high-viscosity epoxy resins. Epoxy resin active diluent, film-forming agent in glass fiber sizing, finishing agent for protein fiber fabrics, improve the wrinkle resistance, anti-shrinkage, anti-yellowing and waterproof of fabrics on the basis of maintaining the original advantages of natural fibers performance such as stains. [0003] Epoxy equivalent refers to the number of grams of epoxy resin containing one equivalent of epoxy groups. Epoxy ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/04
Inventor 嵇安然李翠红
Owner JUSHI GRP CO
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