Patents by Inventor Kaikai CAO

Kaikai CAO has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • METHOD AND DEVICE FOR PREPARING MODIFIED POLY (M-PHENYLENE ISOPHTHALAMIDE) (PMIA) FIBER BY CONTINUOUS POLYMERIZATION-DRY-WET SPINNING
    Publication number: 20240084484
    Abstract: The present disclosure provides a method and a device for preparing a modified poly (m-phenylene isophthalamide) (PMIA) fiber by continuous polymerization-dry-wet spinning. The method includes the following steps: (1) preparing a mixed solution of m-phenylenediamine (MPD) and a copolymerized diamine monomer in N,N-dimethylacetamide (DMAC) serving as a solvent using a cosolvent; (2) mixing isophthaloyl chloride (IPC) with the mixed solution of the MPD and the copolymerized diamine monomer in the DMAC, and conducting pre-polycondensation and polycondensation in sequence to obtain a modified PMIA resin solution; and (3) subjecting the modified PMIA resin solution to additive addition, filtration, defoaming, and dry-wet spinning to obtain the modified PMIA fiber.
    Type: Application
    Filed: October 11, 2022
    Publication date: March 14, 2024
    Applicant: ZHUZHOU TIMES NEW MATERIAL TECHNOLOGY CO., LTD.
    Inventors: Jun YANG, Kaikai CAO, Jin WANG, Yufeng LIU, Zhicheng SONG, You YANG, Feng YUAN, Wei WU, Zhijun ZHANG, Lei CHEN