Nanometer carboxylic acrylonitrile butadiene rubber modified epoxy resin and production method thereof

Abstract

The invention provides nanometer carboxylic acrylonitrile butadiene rubber modified epoxy resin, aiming at providing nanometer carboxylic acrylonitrile butadiene rubber modified epoxy resin which has high rigidity, tenacity and thermal endurance and can not lower the other properties thereof. The epoxy resin comprises the following components by weight percent: 8-15% of nanometer carboxylic acrylonitrile butadiene rubber, 72-80% of epoxy resin, 3-4% of dispersing agent, 3-5% of coupling agent, 1.5-2% of accelerator, 1.5-2% of defoamer and 1-2% of flatting agent. The epoxy resin is prepared by the method comprising the following steps: mixing the nanometer carboxylic acrylonitrile butadiene rubber and dispersing agent; activating the mixture and carrying out temperature control, speed regulation and anchor mixing; mixing the mixture with the other components, and presoaking; and then obtaining the epoxy resin by carrying out the three working procedures, namely coarse grinding, fine grinding and refined grinding.

Description

technical field [0001] The invention relates to a modified epoxy resin and a production method thereof, in particular to a nano carboxylated nitrile rubber modified epoxy resin and a production method thereof. Background technique [0002] Epoxy resin (hereinafter referred to as EP) refers to an organic polymer compound containing two or more epoxy groups in the molecule, and its structure is characterized by active epoxy groups in the molecular chain. This enables them to undergo cross-linking reactions with various types of curing agents to form insoluble, infusible high polymers with a three-dimensional network structure, and thus become the most widely used resin system in some modern new materials. General-purpose EP, as a thermosetting resin, is more and more widely used in rubber base materials, sealing insulation, vehicles, building structures, fiber Composite, military aviation and other fields are one of the most important materials in industry now. At the same t...

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Problems solved by technology

Some of these methods stay in the laboratory stage (such as: the method of interpenetrating network toughening EP), and some although the toughening effect is good, but sacrifice some good performance characteristics of EP (such as: after adding the toughening of the island structure , the effect of impact resistance and toughening is obviously improved, but the heat distortion temperature is lowered to make it lose its competitiveness. Another example is the addition of active rubber such as polysulfide rubber blended with toughened EP. The effect is obvious, but the heat distortion temperature is still reduced. , and the price is expensive, the price of carboxyl-terminated nitrile or hydroxy-terminated nitrile rubber ranges from a few hundred yuan per kilogram to several thousand yuan per kilogram), and it is difficult to use general products

Nano-inorganic particle toughening EP is a recent research hotspot, but according to the existing literature, most of them stay in the experimental stage. The technical solution is too complicated, the capital investment is large and the quality stability is poor

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