Bisphenol epoxy resin and preparation method thereof

A bisphenol epoxy resin, phenol technology, applied in the chemical field, can solve the problems of low heat resistance and toughness, poor heat and humidity resistance and weather resistance, and achieve low cost, good toughness and heat and humidity resistance, and improved toughness. Effect

Inactive Publication Date: 2013-12-18
上海美东生物材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a kind of bisphenol epoxy resin, described this bisphenol epoxy resin will solve the heat resistance and toughness of bisphenol A type epoxy resin in the prior art is not high, moisture and heat resistance and Technical issues with poor weather resistance

Method used

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  • Bisphenol epoxy resin and preparation method thereof
  • Bisphenol epoxy resin and preparation method thereof
  • Bisphenol epoxy resin and preparation method thereof

Examples

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Effect test

Embodiment 1

[0051] The invention provides a preparation method of bisphenol as raw material of epoxy resin. According to the molar ratio of cardanol:phenol = 1:1-10, the catalyst is added into the four-necked flask according to the amount of 0.02-10% of the amount of cardanol, nitrogen Under protection, heat to 70-160°C and stir for 1-10 hours, then discharge, dilute with xylene, wash with hot water (80°C, 500mL*5-10), remove excess phenol, evaporate xylene phase solvent in vacuum The yellow-brown viscous liquid is cardanol-phenol adduct. The viscosity is 8000-150000mPa.S. The compound was separated by column chromatography (silica gel 100-200 mesh, benzene as the eluent) to separate two groups of structures (component 1 and component 2), and then identified by NMR:

[0052] Depend on figure 2 It can be seen that new substances are generated through the reaction. Due to the complexity of the components, the column chromatography cannot be completely separated, so they are divided into t...

Embodiment 2

[0060] like figure 1 As shown, the present invention provides a kind of preparation method of bisphenol epoxy resin, according to bisphenol: epichlorohydrin: the mol ratio of sodium hydroxide=1:1.5~10:1.5~10 quality weighs each material, Then add bisphenol into the reaction vessel, stir, pass nitrogen gas to discharge the air, add epichlorohydrin after 1 to 5 minutes, continue stirring, control the temperature at 40-50 degrees Celsius, add sodium hydroxide, the said hydroxide The mass percentage concentration of sodium is 30-50%. After the dropwise addition, the temperature is raised to 70-100 degrees Celsius, kept for 2-9 hours, dissolved in xylene, washed with hot water for many times, and then distilled under reduced pressure to obtain the first batch of brown-red products. The viscous liquid is the prepared product. The bisphenol used in this embodiment is the bisphenol mixture obtained in Example 1.

[0061] The obtained epoxy resin was basically detected, the epoxy val...

Embodiment 3

[0063] Embodiment 3 The curing experiment of bisphenol epoxy resin and MD650 curing agent.

[0064] The general preparation method of the paint film is in accordance with the national standard GB1727-79, the pencil hardness test method GB / T6739-1996, the paint film adhesion test method GB1720-79, the paint film flexibility test method (bending) GB1731-1993, the paint film impact resistance test Method GB1732-93, plastic Shore hardness test method GB-T2411-2008.

[0065] project

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Abstract

The invention relates to bisphenol epoxy resin. The structural formula of the bisphenol epoxy resin is shown in a drawing, wherein n is 0-200. The invention further provides a preparation method of the bisphenol epoxy resin. The invention further provides a bisphenol structural formula of an intermediate compound for preparing the bisphenol epoxy resin and a preparation method thereof. According to the method, flexible epoxy resin is prepared from a cardanol-phenol adduct serving as a raw material. The resin disclosed by the invention can solidify independently, can be used for improving the toughness of the traditional rigid epoxy resin, and has broad application prospects and values.

Description

technical field [0001] The invention relates to the field of chemistry, in particular to an epoxy resin, specifically a bisphenol epoxy resin and a preparation method thereof. Background technique [0002] In the prior art, the epoxy resin is mainly bisphenol A epoxy resin, which has many advantages due to the structural characteristics of bisphenol A itself, but it also has low heat resistance and toughness, heat resistance and weather resistance. problem of poor sex. The main source of raw material bisphenol A is the extraction and synthesis of petroleum products. The process is complicated, the process is cumbersome, and the cost is high. Petroleum is a strategic resource and is non-renewable. [0003] Cardanol is extracted from natural cashew nut shell oil by advanced technology, contains benzene ring structure, and has high temperature resistance; 2. Polar hydroxyl groups can provide the wettability and activity of the system to the contact surface; 3. The carbon 15 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C39/21C07C39/15C07C37/16C08G59/06
Inventor 黎明黎炘宋学良
Owner 上海美东生物材料股份有限公司
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