Polyurethane heat-conducting structural adhesive with high thixotropic characteristic and preparation method thereof

By using long-chain fatty acids as thixotropic agents in two-component polyurethane structural glue, its thixotropic properties are enhanced, and the problem of settlement and precipitation of structural glue during storage and use is solved, efficient construction and energy consumption are achieved, and the safety and reliability of the battery pack are improved.

CN119709097APending Publication Date: 2025-03-28JIANGSU SANNA TECH MATERIAL CO LTD
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Patent Information

Application Number
CN202411956231.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-28
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

During storage and use, two-component polyurethane structural adhesive is prone to resin precipitation and filler settlement, resulting in a deviation in mixing ratio, poor curing effect or non-curing, affecting the safety and reliability of the battery pack.

Method used

Long-chain fatty acids are used as thixotropic agents to enhance the thixotropic properties of component A, so that it has a higher viscosity at low shear conditions, prevent settlement and precipitation, and has a lower viscosity at high shear conditions, which is convenient for construction and saves energy consumption.

Benefits of technology

It achieves a high viscosity at low shear conditions, prevents settlement and precipitation, and has a low viscosity at high shear conditions, which facilitates construction and saves energy consumption, reduces product costs, and improves the safety and reliability of the battery pack.

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Abstract

The invention provides a polyurethane heat-conducting structural adhesive with high thixotropic characteristic and a preparation method thereof, the polyurethane heat-conducting structural adhesive comprises: a component A comprising polyol, a filler, a water absorbent, a catalyst and a thixotropic agent, the thixotropic agent being fatty acid; and a component B, which is crude MDI. Monofunctional long-chain fatty acid or polyfunctional long-chain fatty acid is adopted to achieve the high thixotropic characteristic, the high thixotropic characteristic is achieved, under the low-shear condition, the viscosity is high, sedimentation and precipitation are not prone to occurring, under the high-shear condition, the viscosity is low, construction is convenient, and energy consumption is reduced; the long-chain fatty acid is wide in source and is generally derived from plant seeds, and the raw materials are renewable; fatty acid is low in price and is applied to the formula, and cost optimization is achieved.
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