Propylene pinoresinol-modified thermoplastic polyurethane and method for preparing the same

By using bio-based materials to prepare propylene-modified thermoplastic polyurethane, the problems of high reaction temperature and insufficient hardness of existing thermoplastic polyurethane materials are solved, achieving cost reduction and performance improvement, making it suitable for medical devices and powder coatings.

CN119875068BActive Publication Date: 2026-09-04GUANGXI UNIV FOR NATITIES
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Patent Information

Application Number
CN202510125831.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-01-27
Publication Date
2026-09-04
Estimated Expiration
2045-01-27

AI Technical Summary

Technical Problem

Existing thermoplastic polyurethane materials require high reaction temperatures during preparation, resulting in complex and costly production processes. Furthermore, their mechanical properties, especially hardness, are not excellent enough to meet the needs of the medical device industry.

Method used

A method for preparing thermoplastic polyurethane modified with propylene pineol was adopted, using bio-based rosin to replace traditional petroleum-based raw materials. The rosin ternary phenanthrene ring structure was introduced by reacting propylene pineol with diisocyanate to form rigid and flexible chain components. A non-tin environmentally friendly catalyst was added to reduce the reaction temperature and improve the mechanical properties.

Benefits of technology

It reduces production costs, improves the hardness and overall performance of polyurethane, and is suitable for the medical device industry, expanding its application areas. In particular, it is used as a reinforcing and modifying component in powder coatings to improve adhesion, hardness, and corrosion resistance.

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Abstract

The application discloses a kind of propylene pimarol modified thermoplastic polyurethane and preparation method thereof, the application is according to weight fraction, including: propylene pimarol 5~50 parts, polyol 0~75 parts, chain extender 0~25 parts, diisocyanate 10~55 parts, catalyst 0.001~0.1 parts, wherein chain extender is not 0.The propylene pimarol modified thermoplastic polyurethane provided by the application introduces the trinuclear phenanthrene ring structure of rosin into the linear main chain structure of thermoplastic polyurethane by the reaction of dihydric alcohol of propylene pimarol and diisocyanate, which retains the rigid structure characteristics of rosin and the good flexibility of fatty six-membered ring non-planar structure compared to traditional carbon chain structure, so the coating prepared by it has better gloss, higher hardness, stronger adhesion, excellent comprehensive performance such as hydrophobicity, corrosion resistance and the like compared to traditional thermoplastic polyurethane material.
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