A quick-drying moisture curing agent and a preparation method thereof

By reacting modified zeolite suspension with polyurethane prepolymer, water molecules react with isocyanate groups to form a polymer network that cures simultaneously at multiple points, solving the problem of slow curing speed of moisture curing agents in low temperature and low humidity environments, and achieving rapid overall curing and improved mechanical strength.

CN122037128BActive Publication Date: 2026-06-26INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
Filing Date
2026-04-15
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing moisture curing agents have a slow curing speed in low temperature and low humidity environments, and tend to form a sealing layer on the coating surface, inhibiting further curing inside the coating and resulting in slow overall curing.

Method used

A modified zeolite suspension was reacted with a polyurethane prepolymer. The modified zeolite surface contains tertiary amino, secondary amino, and hydroxyl groups. By catalyzing the reaction of water molecules with isocyanate groups in a low-temperature and low-humidity environment, a polymer network mainly composed of urea bonds was formed, which promoted the simultaneous multi-point curing of the coating.

Benefits of technology

It significantly improves the overall curing speed of the coating in low temperature and low humidity environments, avoids the formation of a surface sealing layer, and maintains the mechanical strength and construction efficiency of the coating.

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Abstract

The application belongs to the technical field of polyurethane curing agents, and particularly relates to a fast-drying moisture curing agent and a preparation method thereof, and comprises the following steps: zeolite is treated with GPTMS hydrolyzate and DMAPA and then dried, and then dispersed in butyl acetate to obtain a modified zeolite suspension; under the protection of an inert atmosphere, polyether 210, TMP and EGBE are uniformly mixed, heated to 80-85 DEG C, TDI is slowly added under the condition of continuous stirring, stirred and reacted, cooled to 30-40 DEG C, the modified zeolite suspension is slowly added under the condition of continuous stirring, stirred and reacted, and a moisture curing agent is obtained. The moisture curing agent prepared by the application can maintain a relatively fast overall curing speed in a low-temperature and low-humidity environment.
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Citation Information

Patent Citations

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