Preparation method of self-thixotropic polyurethane curing agent, self-thixotropic polyurethane curing agent and application
By reacting highly crystalline polyester polyols and polyether polyols with isocyanates, the problem of thixotropic agent gelation in polyurethane systems was solved, and a self-thixotropic polyurethane curing agent suitable for coatings, adhesives and sealants was prepared.
CN116535611BActive Publication Date: 2026-06-12SHENZHEN FEIYANG JUNYAN TECH DEV
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Patent Information
- Application Number
- CN202310523244.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-05-10
- Publication Date
- 2026-06-12
- Estimated Expiration
- 2043-05-10
AI Technical Summary
Technical Problem
Existing thixotropic agents cause gelation in polyurethane systems due to the high reactivity of isocyanates, which affects the thixotropic effect of the product.
Method used
Highly crystalline polyester polyols and/or polyether polyols are reacted with isocyanates at high temperatures. After cooling to room temperature, crystals and colloids are formed, generating weak interaction forces that make the isocyanates thixotropic.
Benefits of technology
The prepared self-thixotropic polyurethane curing agent is a white paste with good self-thixotropic properties, is not easily gelled, and is suitable for polyurethane systems.
✦ Generated by Eureka AI based on patent content.
Abstract
The application relates to the field of isocyanate curing agents, and particularly discloses a preparation method of a self-thixotropic polyurethane curing agent, the self-thixotropic polyurethane curing agent and application. The preparation method of the self-thixotropic polyurethane curing agent is as follows: isocyanate and polyester diol and / or polyether diol with crystallinity are mixed, reaction is carried out at 70 DEG C to 110 DEG C, the self-thixotropic polyurethane curing agent is obtained after the reaction is completed, cooling to room temperature and standing for more than 12 hours. The polyurethane curing agent prepared by the method is white paste, has good self-thixotropy and can be well applied to a polyurethane system.
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