Full-wave-band heat shielding modified PVB (polyvinyl butyral) composite film as well as preparation method and application thereof

By using an asymmetric, full-band thermal shielding modified PVB composite film, employing CsWO3 nanopowder and ZnO nanopowder for synergistic blocking, combined with an epoxy silane coupling agent and a composite dispersion system, the problems of incomplete band coverage and poor coating reliability of existing thermal shielding PVB films are solved. This achieves efficient full-band blocking and stable light transmission, making it suitable for the lightweight requirements of new energy vehicles.

CN121801137APending Publication Date: 2026-04-07ANHUI YINIAN SEMICON CO LTD
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Patent Information

Application Number
CN202610046507.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-14
Publication Date
2026-04-07

AI Technical Summary

Technical Problem

Existing heat-shielding PVB films suffer from problems such as incomplete wavelength range, poor coating reliability, imbalance between optics and barrier properties, insufficient structural adaptability, and poor dispersion system stability. These issues lead to difficulties in controlling deep temperature rise inside vehicles during summer, easy coating peeling, insufficient light transmittance, and increased difficulty in glass forming.

Method used

A full-band heat-shielding modified PVB composite film with an asymmetric structure is used, comprising a modified PVB matrix and a heat-shielding coating. CsWO3 nanoparticles and ZnO nanoparticles are used for synergistic barrier, combined with an epoxy silane coupling agent and a composite dispersion system. The uniform dispersion of nanoparticles and the stability of the coating are ensured by twin-screw extrusion and ultrasonic dispersion technology.

Benefits of technology

It achieves efficient near-infrared blocking across the entire 780~2500nm wavelength band, improves coating adhesion, has a light transmittance of ≥87.8%, and a reflective glare rate of ≤2.7%, meets lightweight requirements, and has good performance stability and adaptability to industrial production.

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Abstract

The invention relates to the technical field of PVB (polyvinyl butyral) films, in particular to a full-wave-band heat-shielding modified PVB composite film as well as a preparation method and application thereof. The full-band heat shielding modified PVB composite film provided by the invention is of an asymmetric structure and comprises a modified PVB matrix and a heat shielding coating covering one side of the modified PVB matrix, the modified PVB matrix is prepared from the following components: polyvinyl butyral and an epoxy silane coupling agent; the heat shielding coating comprises the following components: CsWO3 nano powder, ZnO nano powder, water-based acrylic resin and a composite dispersion system; the composite dispersion system comprises triethylene glycol di-2-ethylhexoate, polyvinylpyrrolidone and diethylene glycol monobutyl ether. The full-wave-band heat shielding modified PVB composite film provided by the invention can realize 780-2500nm full-wave-band near-infrared high-efficiency barrier, improve the binding force and performance stability of a heat shielding coating, and meet the production requirements of light weight, environmental protection and industrialization at the same time.
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