Preparation and performance study of carbodiimide-modified polyurethane-acrylic resin composite coatings with high transparency, strong adhesion, and excellent weathering performance

IF 6.5 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings Pub Date : 2025-02-13 DOI:10.1016/j.porgcoat.2025.109130

Jie Yu, Ruihong Jiang, DaYu Song

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引用次数: 0

Abstract

Aiming at the problem of insufficient weathering resistance of traditional fluorine-free transparent back sheet coatings, this study innovatively grafted carbodiimide onto polyurethane-acrylic resins through carbon‑nitrogen double bonding and carboxyl acylation reaction to develop a new type of transparent protective coatings, which possesses excellent thermal stability, strong adhesion, and resistance to humidity and heat. Meanwhile, to solve the problems of poor stability of UV absorbers and shielding agents affecting transparency, 3-Glycidyloxypropyltrimethoxysilane was coated onto the surface of cerium oxide nanoparticles using in situ modification technology, resulting in a new anti-UV agent with balanced transmittance and UV-resistant performance. The experimental results show that the initial bond strength of the coating reaches 13.15 N/cm, and it still exceeds 12 N/cm after 168 h of humid-heat aging, the yellowing index is less than 3 and the light transmittance is more than 90 % under the UV irradiation of 60 kWh-m⁻², which confirms its long-term stability in the harsh environment.

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来源期刊

Progress in Organic Coatings 工程技术-材料科学：膜

CiteScore

11.40

自引率

15.20%

发文量

577

审稿时长

48 days

期刊介绍： The aim of this international journal is to analyse and publicise the progress and current state of knowledge in the field of organic coatings and related materials. The Editors and the Editorial Board members will solicit both review and research papers from academic and industrial scientists who are actively engaged in research and development or, in the case of review papers, have extensive experience in the subject to be reviewed. Unsolicited manuscripts will be accepted if they meet the journal''s requirements. The journal publishes papers dealing with such subjects as: • Chemical, physical and technological properties of organic coatings and related materials • Problems and methods of preparation, manufacture and application of these materials • Performance, testing and analysis.