Method for synthesizing liquid epoxy resin and epoxy resin prepared by same
A technology of liquid epoxy resin and epoxy resin, which is applied in the field of synthetic methods and epoxy resins made from it, can solve the problems of lengthy process and difficult wastewater treatment, and achieve the effect of good dehydration speed
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0100] The present embodiment provides a kind of method that liquid epoxy resin is synthesized, and described method comprises the steps:
[0101] (1) Bisphenol A and epichlorohydrin in a molar ratio of 1:8 are catalyzed by PEG400 (polyethylene glycol 400) at 50°C. After dissolving bisphenol A, the material is colorless and transparent. At 58°C, carry out Insulate for the first time for 2 hours, then raise the temperature to 65° C., and conduct the second heat preservation for 1 hour to obtain a reaction solution, wherein the catalyst is 0.5% by weight of bisphenol A;
[0102] (2) in the reaction solution described in step (1), dripping the sodium hydroxide concentration for the first time is the liquid caustic soda of 48wt%, in the liquid caustic soda, the mol ratio of alkali and bisphenol A is 0.8:1, and the dropping time is 1.5 h, carry out the growth reaction at 63°C, 300rpm, and a vacuum of 23kPa. At the same time, the epichlorohydrin and water are co-distilled out. After...
Embodiment 2
[0109] The present embodiment provides a kind of method that liquid epoxy resin is synthesized, and described method comprises the steps:
[0110] (1) Bisphenol A and epichlorohydrin in a molar ratio of 1:3 are catalyzed by PEG200 at 50°C. After dissolving bisphenol A, the material is colorless and transparent. The temperature was raised to 70° C., and the second heat preservation was carried out for 2 hours to obtain a reaction solution, wherein the catalyst was 0.05% by weight of bisphenol A;
[0111] (2) in the reaction solution described in step (1), dripping the sodium hydroxide concentration for the first time is the liquid caustic soda of 55wt%, in the liquid caustic soda, the mol ratio of alkali and bisphenol A is 0.5:1, and the dropping time is 2.0 h, carry out the growth reaction at 61°C, 250rpm, and a vacuum of 20kPa. At the same time, the epichlorohydrin and water are co-distilled out. After liquid-liquid separation by the water separator, the water receiving tank ...
Embodiment 3
[0118] The present embodiment provides a kind of method that liquid epoxy resin is synthesized, and described method comprises the steps:
[0119] (1) Bisphenol A and epichlorohydrin in a molar ratio of 1:17 are catalyzed by 15-crown-5 and 45°C. After dissolving bisphenol A, the material is colorless and transparent. At 55°C, the first Insulate for 2 hours, then raise the temperature to 65° C., and conduct a second heat preservation for 1.52 hours to obtain a reaction solution, wherein the catalyst is 1% by weight of bisphenol A;
[0120] (2) in the reaction solution described in step (1), dripping sodium hydroxide concentration for the first time is the liquid caustic soda of 45wt%, in the liquid caustic soda, the mol ratio of alkali and bisphenol A is 0.7:1, and the dropping time is 1.8 h, carry out growth reaction at 63°C, 350rpm and vacuum degree of 25kPa, at the same time epichlorohydrin and water are co-distilled out, after liquid-liquid separation by water separator, di...
PUM
| Property | Measurement | Unit |
|---|---|---|
| Epoxy value | aaaaa | aaaaa |
| Epoxy value | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More