Use of solvent-free compositions comprising epoxy-functional oxazolidinones for the manufacture of adhesives, sealing compounds, potting compounds and composites

By using solvent-free composition C, aliphatic polyepoxides and polyisocyanate compounds are copolymerized to generate epoxy group-terminated polyoxazolidinones, which solves the problems of environmental unfriendliness and insufficient solvent resistance of existing epoxy group-terminated polyoxazolidinone coatings, and realizes the manufacturing of highly environmentally compatible and flexible products.

CN122422385APending Publication Date: 2026-07-17COVESTRO DEUTSCHLAND AG
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
COVESTRO DEUTSCHLAND AG
Filing Date
2024-12-16
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing polyoxazolidinone coating compositions based on epoxy group end capping are mostly solvent-based, which have problems such as being environmentally unfriendly and having insufficient solvent resistance.

Method used

Using solvent-free composition C, an epoxy group-terminated polyoxazolidinone is generated by copolymerizing an aliphatic polyepoxide compound with an alicyclic, aromatic, or araliphatic polyisocyanate compound in the presence of a catalyst. This polyoxazolidinone is then combined with compounds having reactive terminal epoxy groups and additives to form a product with high environmental compatibility and high flexibility.

Benefits of technology

It achieves high environmental compatibility and good solvent resistance, making it suitable for manufacturing adhesives, sealing compounds, composite materials and coatings, avoiding the environmental impact of solvent use.

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Abstract

本发明涉及无溶剂组合物C用于制造胶粘剂、密封化合物、灌封化合物、复合材料如纤维复合材料、或模制品，或用于在矿物、金属或塑料基底上制造涂层的用途，所述无溶剂组合物C包含：(A)至少一种环氧基团封端的聚噁唑烷酮，其衍生自方法P，所述方法P包括使(A1)至少一种脂族聚环氧化合物与(A2)至少一种脂环族和 / 或至少一种芳族和 / 或至少一种芳脂族多异氰酸酯化合物优选在(A3)至少一种催化剂的存在下共聚，其中该方法以≥2:1至≤25:1的聚环氧化物组分(A1)的环氧基团对多异氰酸酯组分(A2)的异氰酸酯基团的摩尔比操作，所述无溶剂组合物C进一步包含(B)至少一种具有至少一个对末端环氧基团为反应性的基团的化合物，(C)任选至少一种催化剂，和(D)任选至少一种添加剂。本发明还涉及根据本发明的用途可获得的前述产品。
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Citation Information

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