Patents by Inventor Qingquan YANG

Qingquan YANG 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).

  • Polyolefin resin powder suitable for selective laser sintering and its preparation method
    Patent number: 10920025
    Abstract: A method for preparing a polyolefin resin powder has the steps of a) heat dissolving a polyolefin resin in an organic solvent having a solubility parameter less than or equal to the solubility parameter of the polyolefin resin to obtain a polyolefin resin solution; b) cooling the polyolefin resin solution to precipitate a solid, thereby obtaining a solid-liquid mixture; c) optionally adding an adjuvant to the solid-liquid mixture and mixing; and d) conducting solid-liquid separation and drying to obtain a polyolefin resin powder suitable for selective laser sintering. The difference between the solubility parameters of the organic solvent and of the polyolefin resin is within 0-20% of the solubility parameter of the polyolefin resin. The polyolefin resin powder obtained according to this method has good antioxidant property, good powder flowability, moderate size, smooth surface, suitable bulk density, and suitable dispersibility and particle size distribution.
    Type: Grant
    Filed: April 15, 2016
    Date of Patent: February 16, 2021
    Assignees: CHINA PETROLEUM & CHEMICAL CORPORATION, BEIJING RESEARCH INSTITUTE OF CHEMICAL INDUSTRY, CHINA PETROLEUM & CHEMICAL CORPORATION
    Inventors: Jianye Liu, Shijun Zhang, Liqiu Chu, Liying Zhang, Hao Zou, Mu Dong, Dali Gao, Baige Chou, Jingbo Shao, Yun Lyu, Hua Yin, Qingquan Yang, Jie Li, Yiqing Bai, Yihui Xu
  • POLYOLEFIN RESIN POWDER SUITABLE FOR SELECTIVE LASER SINTERING AND ITS PREPARATION METHOD
    Publication number: 20180355122
    Abstract: A method for preparing a polyolefin resin powder has the steps of a) heat dissolving a polyolefin resin in an organic solvent having a solubility parameter less than or equal to the solubility parameter of the polyolefin resin to obtain a polyolefin resin solution; b) cooling the polyolefin resin solution to precipitate a solid, thereby obtaining a solid-liquid mixture; c) optionally adding an adjuvant to the solid-liquid mixture and mixing; and d) conducting solid-liquid separation and drying to obtain a polyolefin resin powder suitable for selective laser sintering. The difference between the solubility parameters of the organic solvent and of the polyolefin resin is within 0-20% of the solubility parameter of the polyolefin resin. The polyolefin resin powder obtained according to this method has good antioxidant property, good powder flowability, moderate size, smooth surface, suitable bulk density, and suitable dispersibility and particle size distribution.
    Type: Application
    Filed: April 15, 2016
    Publication date: December 13, 2018
    Inventors: Jianye LIU, Shijun ZHANG, Liqiu CHU, Liying ZHANG, Hao ZOU, Mu DONG, Dali GAO, Baige CHOU, Jingbo SHAO, Yun LYU, Hua YIN, Qingquan YANG, Jie LI, Yiqing BAI, Yihui XU
  • Polyethylene compositions and films formed therefrom
    Patent number: 9988505
    Abstract: A polyethylene composition comprising an ethylene/?-olefin copolymerized linear low density polyethylene, wherein the polyethylene composition has a Mw of from 100,000 g/mol to 200,000 g/mol, a Mw/Mn of from 4.0 to 9.0, a Mz/Mw of from 4.0 to 7.0, and a Mz+1/Mw of from 4.5 to 13.5, is provided. A film formed of the polyethylene composition is also provided.
    Type: Grant
    Filed: October 27, 2015
    Date of Patent: June 5, 2018
    Assignees: China Petroleum & Chemical Corporation, Beijing Research Institute of Chemical Industry, China Petroleum and Chemical Corporation
    Inventors: Dali Gao, Hongwei Shi, Shijun Zhang, Meifang Guo, Luqiang Yu, Jinliang Qiao, Ruxian Li, Yujing Tang, Jianjun Yin, Liangshi Wang, Honghong Huang, Qingquan Yang, Hao Zou, Jie Li, Liying Zhang, Hua Yin, Jianye Liu, Jingbo Shao, Mingfu Lyu, Liqiu Chu, Meng Xu, Hui Quan, Kai Xu, Mu Dong, Yun Lyu, Yihui Xu, Yaohui Xu, Peng Guo, Yiqing Bai
  • POLYETHYLENE COMPOSITIONS AND FILMS FORMED THEREFROM
    Publication number: 20160115285
    Abstract: A polyethylene composition comprising an ethylene/?-olefin copolymerized linear low density polyethylene, wherein the polyethylene composition has a Mw of from 100,000 g/mol to 200,000 g/mol, a Mw/Mn of from 4.0 to 9.0, a Mz/Mw of from 4.0 to 7.0, and a Mz+1/Mw of from 4.5 to 13.5, is provided. A film formed of the polyethylene composition is also provided.
    Type: Application
    Filed: October 27, 2015
    Publication date: April 28, 2016
    Inventors: Dali GAO, Hongwei SHI, Shijun ZHANG, Meifang GUO, Luqiang YU, Jinliang QIAO, Ruxian LI, Yujing TANG, Jianjun YIN, Liangshi WANG, Honghong HUANG, Qingquan YANG, Hao ZOU, Jie LI, Liying ZHANG, Hua YIN, Jianye LIU, Jingbo SHAO, Mingfu LYU, Liqiu CHU, Meng XU, Hui QUAN, Kai XU, Mu DONG, Yun LYU, Yihui XU, Yaohui XU, Peng GUO, Yiqing BAI