Colorless polyimide film containing fluorine and cardo structure and preparation method thereof

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11697710
APP PUB NO 20210040266A1
SERIAL NO

16533911

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Abstract

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A polyimide film contains fluorinated substituents and cardo structures. The polyimide film exhibits excellent heat-resistance, transparency and mechanical properties. The polyimide film has a glass-transition temperature (Tg) of at least 360° C., a coefficient of thermal expansion (CTE) of 50 ppm/° C. or lower, a modulus of at least 4.0 Gpa, a b* value of 5 or lower and yellowness index of 8 or less. The polyimide film can be used as a display substrate or an optical film in a liquid crystal display (LCD), an organic light-emitting diode (OLED) and in other fields where the characteristic features are required.

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Patent Owner(s)

  • RAYITEK HI-TECH FILM COMPANY, LTD., SHENZHEN; JIAXING RAYITEK FILM TECHNOLOGY CO., LTD.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Jiang, YanYan Shangrao, CN 4 1
Ren, Xi Yueyang County, CN 12 3
Wang, ZhenZhong Zhuzhou, CN 36 25
Zhang, Wei Guilin, CN 2316 17769

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