Preparation method of epoxy emulsifier, epoxy resin aqueous dispersion and preparation method of epoxy resin aqueous dispersion
A technology of epoxy emulsifier and epoxy resin, applied in the direction of epoxy resin glue, epoxy resin coating, adhesive, etc., can solve problems such as complex process, achieve simple process, improve adhesion and anti-corrosion performance, and reduce usage Effect
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Embodiment 1a
[0046] Example 1a: Inject 500g of molten dehydrated polyethylene glycol (molecular weight: 1000) into the kettle, keep the temperature in the kettle at 80°C, then add 184.8g of hexahydrophthalic anhydride into the reaction kettle, keep at 80°C, react for about 3 hours, and take a sample After the test acid value reaches the theoretical value (determined by NaOH back titration, the same below), then inject 760g of epoxy resin E51, stir evenly, add 0.7224g of triphenylphosphine (TPP) catalyst, react at a constant temperature of 140°C for 5h, and test the acid value After reaching the theoretical value, add 5.8g of phosphoric acid, stir and react at 80°C for about 3 hours, and discharge the material after the test epoxy value reaches the theoretical epoxy value (measured by the hydrochloric acid-acetone method, the same below).
Embodiment 2a
[0047] Example 2a: 500g of molten dehydrated polyethylene glycol (molecular weight: 1000) was injected into the kettle, and the temperature in the kettle was kept at 80°C, and then 169.4g of hexahydrophthalic anhydride was added into the reaction kettle, kept at 80°C, and reacted for about 3 hours. After taking samples to test that the acid value reaches the theoretical value, inject 760g of liquid epoxy resin E51, stir evenly, add 0.715g of triphenylphosphine (TPP) catalyst, and react at a constant temperature of 140°C for 5 hours. After the test acid value reaches the theoretical value, add 5.8g of Phosphoric acid, stirred and reacted at 80°C for about 3 hours, then added 2g of sodium hydroxide, reacted at 80°C for 1 hour, and discharged after the test epoxy value reached the theoretical epoxy value.
Embodiment 3a
[0048] Example 3a: Inject 1000g of melt-dehydrated polyethylene glycol (molecular weight: 4000) into the kettle, keep the temperature in the kettle at 80°C, then add 77g of hexahydrophthalic anhydride into the reaction kettle, raise the temperature to 110°C, react for about 3 hours, and take a sample After the test acid value reaches the theoretical value, inject 285g of epoxy resin E51, stir evenly, add 5.45g of triphenylphosphine (TPP) catalyst, and react at a constant temperature of 130°C for 3 hours. After the test acid value reaches the theoretical value, add 15.15g of phosphoric acid mono Ethyl ester, stirred and reacted at 80°C for about 3 hours, and discharged after the tested epoxy value reached the theoretical epoxy value.
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