Cathode electrophoresis paint emulsion of anti-punching explosion paint and preparation method thereof
By introducing amino-modified polybutadiene liquid rubber and self-crosslinking polyamide resin into cathodic electrophoretic coatings, a high crosslinking density network is constructed, which solves the problem of film cracking in traditional cathodic electrophoretic coatings during punching processing, while maintaining hardness and corrosion resistance.
CN122127888APending Publication Date: 2026-06-02HUBEI LONGSHENG SIHAI NEW MATERIALS CO LTD +1
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Patent Information
- Application Number
- CN202610439686.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-04-03
- Publication Date
- 2026-06-02
AI Technical Summary
Technical Problem
Traditional cathodic electrocoating is prone to "paint cracking" during punching, where the paint film cracks and peels off at the edges. Existing improvement solutions sacrifice the hardness and corrosion resistance of the paint film.
Method used
Amino-modified polybutadiene liquid rubber is introduced into the cathodic electrophoretic coating system to construct flexible microdomains, which are combined with self-crosslinking polyamide resin to form a high crosslinking density network to absorb local stress at the edges and corners of punched holes.
Benefits of technology
By preventing paint film cracking and peeling during punching while maintaining the hardness and corrosion resistance of the paint film, the effect of preventing paint peeling during punching is achieved.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention relates to a cathode electrophoretic paint emulsion of anti-punching explosion paint and a preparation method thereof, and relates to the technical field of electrophoretic paints.The preparation method comprises the following steps that S1, part of isocyanate groups of toluene diisocynate are sealed, then the isocyanate groups which are not sealed react with polyamide resin for bonding, and self-crosslinking polyamide resin is obtained; s2, carrying out amination reaction on the epoxy-terminated polybutadiene rubber and a first amine compound to obtain modified polybutadiene liquid rubber with amino groups; s3, epoxy resin and a second amine compound are subjected to a ring-opening amination reaction, and amine modified epoxy resin is obtained; s4, grafting the self-crosslinking polyamide resin to the amine modified epoxy resin to obtain grafted resin; and S5, physically mixing the amino-modified polybutadiene liquid rubber with the grafted resin, neutralizing with organic acid, and dispersing with water to obtain the cathode electrophoretic coating emulsion. The method solves the problems of cracking and stripping of corners of a paint film after secondary machining such as punching of an existing electrophoretic paint.
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