High-toughness resin coating internal crosslinking type dispersing agent and preparation method thereof

Abstract

The invention provides a high-toughness resin coating internal crosslinking type dispersing agent and a preparation method thereof. The dispersing agent is mainly prepared from the following components: 36.70 to 38.63 parts of polyether alcohol, 257.74 to 271.67 parts of a cyclic monomer, 0.5 to 1.2 parts of a catalyst, 76.56 to 80.70 parts of a cationic monomer, 1.5 to 3.9 parts of a reducing agent, 2.4 to 5.8 parts of an initiator, 2.2 to 6.1 parts of a neutralizing agent, 0.5 to 2.7 parts of a chain transfer agent and the balance of deionized water. According to the invention, polyether is used as a branch chain of the dispersant to prepare a short-side-chain high-toughness resin internal crosslinking dispersant, the adsorption performance of the dispersant is improved by using the short side chain, and the steric hindrance effect of the dispersant is improved by reducing the acid-ether ratio and improving the spatial density of the short side chain.

Description

Technical field [0001] The present invention belongs to the discretitive technical field, and is specifically a high tough resin coating internal crosslinking type dispersant and a preparation method thereof. Background technique [0002] Epoxy resin adhesives have excellent bonding properties, electrical insulation properties, chemical resistance and corrosion resistance, curing shrinkage rate, etc., is widely used in aerospace, automotive, microelectronics, precision machinery, etc., but their internal stress Large, crisp, etc., there is a wider use of it. For the brittleness of the epoxy resin system, the most effective toughening method is to increase the epoxy resin. [0003] Patent CN 111029341A discloses a silicone resin-based nonionic super dispersant, involving a silicone resin-based nonionic super dispersant and a preparation method thereof, is an end-epoxy silicone oil and a single-endonin polyether according to substance After mixing 1: 1.1 to 1.1: 1, the reaction was...

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Problems solved by technology

The present invention uses styrenated phenol to react with ethylene oxide and propylene oxide to generate polyether monomers with a weight average molecular weight of 1200, and the prepared polyether monomers react with 2-amino-2-butenoic acid to generate dispersant molecules Finally, as a branch chain of the dispersant molecule, since the alcohol head has a benzene ring and the molecular weight of the prepared polyether is 1200, the main chain of the molecular chain is rigid, which can effectively solve the problem that the molecular chain of the dispersant is too flexible and easy to be entangled, and enhances the Adaptability of dispersants

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