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Flexible epoxy resin and preparation method thereof

A technology of flexible epoxy resin and hydrogen peroxide, which is applied in the chemical industry, can solve the problems of brittleness and other problems, and achieve the effects of improving brittleness, good toughness, and obvious technical effects

Inactive Publication Date: 2016-04-20
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

[0002] Epoxy resins are widely used in various fields due to their excellent properties, but commercially available epoxy resins are mainly bisphenol A resins, and the structure of bisphenol A resins determines that their cured properties are relatively brittle

Method used

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  • Flexible epoxy resin and preparation method thereof
  • Flexible epoxy resin and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0011] Weigh 80g of phenol glycidyl ether according to weight, stir 200g of dichloromethane evenly, add 50g of phosphoric acid and 15g of acetic acid while stirring, reflux at room temperature for 30 minutes, then slowly add 140g of hydrogen peroxide (35%), control the temperature within 30°C After reacting for 8 hours, wash with water to neutral extraction, adjust PH to neutral extraction with sodium carbonate, wash twice with deionized water and remove water to obtain product with a calculated yield of 98.2%, epoxy value of 0.211, and film flexural toughness of 1mm , Impact 50cm. Bisphenol A type epoxy resin paint film with the same epoxy value has a toughness of 3mm and an impact of 30cm.

Embodiment 2

[0013] Weigh 80g of cardanol glycidyl ether according to weight, stir 500g of dichloromethane evenly, add 60g of phosphoric acid and 15g of acetic acid while stirring, reflux reaction at room temperature for 30 minutes, then slowly add 160g (35%) of hydrogen peroxide, and control the temperature at 30°C Within 8 hours, wash with water to neutral extraction, use sodium carbonate to adjust PH to neutral extraction, wash twice with deionized water and remove water to obtain a product with a calculated yield of 98.2%, an epoxy value of 0.213, and a paint film with a flexural toughness 1mm, impact 50cm. Bisphenol A type epoxy resin paint film with the same epoxy value has a toughness of 3mm and an impact of 30cm.

Embodiment 3

[0015] Weigh 80g of cardanol glycidyl ether by weight, stir 500g of dichloromethane evenly, add 25g of phosphoric acid and 20g of acetic acid while stirring, reflux reaction at room temperature for 30 minutes, then slowly add 140g (35%) of hydrogen peroxide, and control the temperature at 30°C Within 8 hours, wash with water to neutral extraction, use sodium carbonate to adjust PH to neutral extraction, wash twice with deionized water and remove water to obtain a product with a calculated yield of 98.2%, an epoxy value of 0.221, and a paint film with a flexural toughness 1mm, impact 50cm. Bisphenol A type epoxy resin paint film with the same epoxy value has a toughness of 3mm and an impact of 30cm.

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Abstract

The invention provides a flexible epoxy resin of which the structural formula is disclosed in the specification. The invention also provides a preparation method of the flexible epoxy resin, which comprises the following steps: weighing cardanol glycidol ether and dichloromethane, stirring uniformly while adding phosphoric acid and acetic acid, reacting at room temperature for 20-60 minutes, adding oxydol, reacting for 5-10 hours while controlling the temperature at 30 DEG C or below, washing with water to a neutral state, extracting, washing with deionized water, and removing the water to obtain the product. The cured resin has favorable toughness, thereby overcoming the defect of high brittleness of the cured bisphenol A epoxy resin.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to a flexible epoxy resin and a preparation method thereof. Background technique [0002] Epoxy resins are widely used in various fields due to their excellent properties, but the commercially available epoxy resins are mainly bisphenol A resins, and the structure of bisphenol A resins determines that their cured properties are relatively brittle. Contents of the invention [0003] The object of the present invention is to provide an epoxy resin and a preparation method thereof, which solves the technical problem that the epoxy resin in the prior art is brittle after curing. [0004] The invention provides a kind of epoxy resin, its structural formula is as follows, [0005] [0006] The present invention also provides the preparation method of above-mentioned a kind of epoxy resin, add cardanol glycidyl ether, methylene chloride and stir evenly, add phosphoric acid and acetic ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/32C07D303/28C07D301/12
CPCC07D301/12C07D303/28C08G59/3218
Inventor 宋学良毕丽杰
Owner 上海美东生物材料股份有限公司
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