A preparation method of ethyl lactate-free silicone sealant

By preparing hydrophilic and hydrophobic fillers, the bubble problem and poor fluidity of ethyl delactic acid silicone sealant when curing at high temperatures are solved, and its strength and transparency in high temperature and high humidity environments are improved.

CN119736062AActive Publication Date: 2025-04-01SHANDONG YONGAN ADHESIVE IND
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Patent Information

Application Number
CN202510245681.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-03-04
Publication Date
2025-04-01
Estimated Expiration
2045-03-04

AI Technical Summary

Technical Problem

Ethyl delactic acid silicone sealant easily forms bubbles when cured at high temperatures, has poor fluidity, and is affected in high temperature and high humidity environments.

Method used

By using the method of preparing hydrophilic fillers and hydrophobic fillers, a composite filler with a high specific surface area is formed through steps such as primary and secondary cladding, which is used to improve the fluidity and strength of silicone sealant.

Benefits of technology

It effectively avoids the bubble problem during curing at high temperatures, improves the fluidity, strength and transparency of silicone sealant, and ensures that it still has high strength in high temperature and high humidity environments.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention discloses a preparation method of deethyl lactate type silicone sealant, belonging to the technical field of silicone sealants. The preparation method comprises: preparing a hydrophilic filler, preparing a hydrophobic filler, and mixing materials; the preparation of the hydrophilic filler comprises: primary coating and secondary coating; the secondary coating comprises mixing ethyl orthosilicate, a hydrochloric acid aqueous solution, and primary coated talcum powder, stirring, centrifuging, collecting precipitates, washing, and drying; the preparation of the hydrophobic filler comprises: primary adsorption, secondary adsorption, and cross-linking; the secondary adsorption comprises mixing sodium stearate and water, stirring, adding primary adsorption white carbon black, stirring, centrifuging, collecting precipitates, washing, and drying; when the deethyl lactate type silicone sealant prepared by the invention is cured at high temperature, bubbles are not easily formed inside, the fluidity is good, the strength is still high after being cured under high temperature and high humidity environment, and the strength and transparency are high, and the curing speed is fast.
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Citation Information

Patent Citations

  • De-ethyl lactate transparent neutral silicone sealant and preparation method thereof

    CN107033835A

  • Room-temperature curing ethyl lactate removal type silicone sealant

    CN107523257A

  • High-strength silicone sealant and preparation method thereof

    CN115975589A

  • Preparation method and application of composite crystalline nano calcium carbonate

    CN117682544A

  • Composite silicone sealant having high gas barrier property and preparation method therefor

    WO2018036427A1

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