Low viscosity aniline polyether polyols, their preparation methods and applications

By using aniline compounds in combination with o-toluenediamine as initiators, and combining specific polymerization and purification steps, the viscosity of o-toluenediamine polyether was successfully reduced, solving the problems of operability and applicability, while maintaining the thermal conductivity and stability of rigid polyurethane foam.

CN117327267BActive Publication Date: 2026-05-26SHANDONG INOV NEW MATERIALS CO LTD
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Patent Information

Application Number
CN202311150933.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-09-07
Publication Date
2026-05-26
Estimated Expiration
2043-09-07

AI Technical Summary

Technical Problem

In the prior art, o-toluene diamine polyether has a high viscosity, resulting in poor operability and applicability. Furthermore, methods to reduce viscosity can affect the stability or thermal conductivity of the product.

Method used

Aniline compounds and o-toluenediamine were used as composite initiators, and low-viscosity aniline polyether polyols were prepared by controlling polymerization reaction conditions and purification treatment. This included the stepwise addition of alkali metal catalysts such as potassium hydroxide or sodium hydroxide and epoxide alkane, combined with neutralization, adsorption and drying steps.

Benefits of technology

The viscosity of o-toluene diamine polyether was significantly reduced, improving operability and applicability, while maintaining the thermal conductivity and stability of rigid polyurethane foam.

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Abstract

This invention belongs to the field of polyether polyol technology, specifically relating to low-viscosity aniline polyether polyol, its preparation method, and its application. The low-viscosity aniline polyether polyol has a viscosity below 10000 mPa·s, and its raw material components include 5-15 parts of o-toluene diamine, 10-35 parts of aniline compound, 0.05-0.3 parts of alkali metal catalyst, and 30-70 parts of epoxide alkane. The resulting low-viscosity aniline polyether polyol has even lower viscosity, resulting in better operability and applicability in product applications, and exhibits excellent thermal conductivity in the preparation of rigid polyurethane foam products. The preparation method is simple and convenient. The application of the low-viscosity aniline polyether polyol is in the preparation of rigid polyurethane foam.
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