Highly transparent photochromic polyester film and method for making same

By introducing surface-modified inorganic photochromic nanoparticles in situ during the polyester synthesis stage, the problems of shedding and transparency of photochromic polyester films were solved, achieving high transparency, rapid color change and stability, simplifying the preparation process and improving the overall performance of the film.

CN122502833APending Publication Date: 2026-08-04JIANGSU SHUANGXING COLOR PLASTIC NEW MATERIALS
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Patent Information

Application Number
CN202610565317.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-27
Publication Date
2026-08-04

AI Technical Summary

Technical Problem

Existing photochromic polyester films are prone to peeling and color-changing function decay during long-term use or in harsh environments, and have poor transparency and mechanical properties. Moreover, the preparation process is complex and inefficient.

Method used

By introducing surface-modified inorganic photochromic nanoparticles in situ during the polyester synthesis stage, nanoscale dispersion and chemical anchoring of these nanoparticles in the polyester molecular chain are achieved, thus preparing a photochromic polyester film with high transparency, rapid color change, and stability.

Benefits of technology

It achieves high transparency, rapid color-changing response and excellent stability, extends service life, simplifies the preparation process and reduces environmental burden.

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Abstract

The application discloses a kind of high transparent photochromic polyester film and preparation method thereof, the film is composed of photochromic polyester layer, the photochromic polyester layer contains in-situ polymerized, surface-modified inorganic photochromic nanoparticles, the haze of the film is ≤3%, color change occurs within 5 seconds under sunlight irradiation.The high transparent photochromic polyester film provided by the application has high transparency, fast color change, excellent stability and green environmental protection, etc., can meet the stringent requirements of intelligent window film, high-end anti-counterfeiting, optical devices and other fields, and has extremely high application value and market prospect.
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