Curing agent polyurethane prepolymer, JS waterproof emulsion, JS waterproof coating and preparation method thereof

By introducing core-shell structure epoxy resin curing agent and organosilane coupling agent into JS waterproof coating, JS waterproof coating with self-healing function is formed, which solves the problem of paint cracking and improves the water resistance and appearance quality of the paint.

CN120383839APending Publication Date: 2025-07-29ASIA CUANON TECH SHANGHAI +1
1 Cites 0 Cited by

Patent Information

Application Number
CN202510742801.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-05
Publication Date
2025-07-29

AI Technical Summary

Technical Problem

The existing JS waterproof coatings are prone to cracking due to stress differences during use. The existing methods cannot effectively balance the crack resistance and the appearance of the coating film, resulting in poor market acceptance.

Method used

By preparing polyurethane prepolymers, using core-shell structure design, the epoxy resin curing agent is coated in the polyurethane shell layer, and cross-linked by the organosilane coupling agent to form a JS waterproof coating with self-healing function, and the epoxy resin is released by frictional force for coating repair.

Benefits of technology

It realizes the self-repair function of JS waterproof coating after cracking, improves the water resistance, viscosity stability and appearance texture of the coating, solves the cracking problem, and maintains good waterproof performance.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention provides a curing agent polyurethane prepolymer, a JS waterproof emulsion, a JS waterproof coating and a preparation method thereof, and relates to the technical field of waterproof coatings. The curing agent polyurethane prepolymer is prepared from the following raw materials in parts by weight: 2 to 4 parts of micromolecular dihydric alcohol, 6 to 12 parts of macromolecular polyhydric alcohol, 3 to 6 parts of functional monomer, 3 to 5 parts of hydrophilic polyhydric alcohol, 55 to 80 parts of polyisocyanate, 0.1 to 1 part of catalyst, 3 to 5 parts of organic amine, 1 to 5 parts of organic silane coupling agent and 2 to 8 parts of epoxy resin curing agent. When the JS waterproof coating cracks in the coating process, under the action of friction force, the microspheres in the polyurethane shell layer are broken, the epoxy resin curing agent in the microspheres is released to repair the coating, the effect of the self-repairing function is achieved, and the cracking problem of the JS waterproof coating is effectively solved.
Need to check novelty before this filing date? Find Prior Art