Modifying method of solid epoxy resin

A solid epoxy resin, modification technology, applied in the field of epoxy resin modification, can solve problems such as limiting the application range of solid epoxy resin

Active Publication Date: 2015-11-18
JIANGSU KUMHO YANGNONG CHEM CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the condition of specific epoxy equivalent, the viscosity has a certain range, which limits the application range of solid epoxy resin

Method used

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  • Modifying method of solid epoxy resin

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Set the epoxy resin with the target epoxy value of 2110mmol / kg, the addition of p-tert-butylphenol accounts for 1.5% of the total mass of base resin, bisphenol A, additives and catalysts, and calculate E51, bisphenol A, p-tert-butyl The addition quality of phenylphenol and ethyltriphenylphosphine iodide is 1.1553kg, 0.3222kg, 0.225kg and 450kg.

[0047] Under the condition of nitrogen blanketing, mix E51 and bisphenol A in a reactor by stirring, and heat up to a melting temperature of 120°C to completely melt E51 and bisphenol A to obtain a molten material;

[0048] The obtained molten material is mixed with the additive p-tert-butylphenol and the catalyst ethyltriphenylphosphine iodide, and the temperature is raised to the final reaction temperature of 175°C at a rate of 1°C / min for reaction, and the temperature is controlled at 175±5°C. Cool after reacting for 90min to obtain modified solid epoxy resin.

Embodiment 2

[0050] Adopt the method of embodiment 1 to obtain modified solid epoxy resin, the difference is that in the present embodiment, the addition of p-tert-butylphenol accounts for 3% of the total mass of base resin, bisphenol A, additive and catalyst, and E51, The added masses of bisphenol A, p-tert-butylphenol and ethyltriphenylphosphine iodide were 1.1520kg, 0.3030kg, 0.045kg and 450kg.

Embodiment 3

[0052] Adopt the method of embodiment 1 to obtain modified solid epoxy resin, the difference is, set the epoxy resin of target epoxy value 1510mmol / kg in the present embodiment, calculate E51, bisphenol A, p-tert-butylphenol And the addition mass of ethyl triphenylphosphine iodide is 1.0918kg, 0.3857kg, 0.0225kg and 450kg.

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Abstract

The invention discloses a modifying method of solid epoxy resin, and especially relates to a modifying method for reducing the viscosity of the solid epoxy resin. The method comprises the following steps: carrying out mixing melting on base resin and bisphenol A under an oxygen isolation condition to obtain a molten material, adding a catalyst and a compound additive containing a phenolic hydroxyl group, and reacting to obtain modified solid epoxy resin. The modifying method reduces the viscosity of the epoxy resin, and widens the viscosity range of the epoxy resin under a fixed epoxy equivalent condition in order to enlarge the application range of the epoxy resin.

Description

technical field [0001] The invention relates to the field of epoxy resin modification, in particular to a modification method for reducing the viscosity of solid epoxy resin. Background technique [0002] The solid epoxy resin is a mixture of bisphenol A diglycidyl ethers with different degrees of polymerization, and contains a certain amount of components with unclosed rings at the end (terminal non-epoxy group components). Solid epoxy resin has many excellent properties, good processing technology, high adhesion, good stability, low water absorption, excellent electrical insulation performance and high mechanical strength after adding curing agent. Widely used in electronics, electrical appliances, paints, coatings, bonding, civil engineering and other fields. [0003] The viscosity of solid epoxy resin is usually expressed by the kinematic viscosity or the viscosity in the molten state, and the kinematic viscosity of the same substance corresponds to the viscosity in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/62
Inventor 俞孝伟杨颖孙祥宋数宾许磊
Owner JIANGSU KUMHO YANGNONG CHEM CO LTD
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