Patents by Inventor Yizhang Li

Yizhang Li 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).

  • Patent number: 7812073
    Abstract: A preparation method of small particle-sized polybutadiene latex used for the production of ABS is disclosed, which includes putting components comprising 34.00-45.00% by weight of the butadiene, 0-6.0% by weight of the second monomer, 52.11-63.13% by weight of the desalinized water, 0.12-0.22% by weight of the mercaptan(TDM), 0.80-2.60% by weight of the emulsifiers composed of potassium abietate and potassium oleate, into the same polymerization reactor, then heating the mixture of the components and stirring the same at a temperature range of 60-75° C. The reaction lasts for 9-12 hours and the conversion is higher than 97%. The method has the advantages such as higher conversion, shorter reaction period and lower latex viscosity. During the first stage of the reaction, more heat is released by increasing the reaction rate. When the conversion reaches 40-80%, the heat release rate of intermediate stage is depressed by decreasing the reaction temperature.
    Type: Grant
    Filed: October 9, 2005
    Date of Patent: October 12, 2010
    Assignees: China National Petroleum Corporation, China National Petroleum Corporation Daqing Petro-Chemical Complex
    Inventors: Liben Huang, Zhiqiang Wan, Yizhang Li, Jian Zhou, Xingcai Jiang, Shufeng Wang, Chengbao Li, Yuliang Lou, Yan Liu
  • Publication number: 20090076205
    Abstract: A preparation method of small particle-sized polybutadiene latex used for the production of ABS is disclosed, which includes putting components comprising 34.00-45.00% by weight of the butadiene, 0-6.0% by weight of the second monomer, 52.11-63.13% by weight of the desalinized water, 0.12-0.22% by weight of the mercaptan(TDM), 0.80-2.60% by weight of the emulsifiers composed of potassium abietate and potassium oleate, into the same polymerization reactor, then heating the mixture of the components and stirring the same at a temperature range of 60-75° C. The reaction lasts for 9-12 hours and the conversion is higher than 97%. The method has the advantages such as higher conversion, shorter reaction period and lower latex viscosity. During the first stage of the reaction, more heat is released by increasing the reaction rate. When the conversion reaches 40-80%, the heat release rate of intermediate stage is depressed by decreasing the reaction temperature.
    Type: Application
    Filed: October 9, 2005
    Publication date: March 19, 2009
    Inventors: Liben Huang, Zhiqiang Wan, Yizhang Li, Jian Zhou, Xingcai Jiang, Shufeng Wang, Chengbao Li, Yuliang Lou, Yan Liu