公开(公告)号：US20230220124A1

公开(公告)日：2023-07-13

申请号：US18001613

申请日：2021-06-14

申请人： Bridgestone Corporation

发明人： Robert W. WHITE ,  Michael R. HARTZELL ,  Mark N. DEDECKER ,  Jason K. KWAN

IPC分类号： C08C2/02 ,  C08K5/41 ,  C08C1/10 ,  C08J3/07

CPC分类号： C08C2/02 ,  C08K5/41 ,  C08C1/10 ,  C08J3/07 ,  C08J2307/02

摘要： In various embodiments, methods for producing aqueous polyisoprene latex from natural cis-1,4-polyisoprene are described. The natural cis-1,4-polyisoprene may be sourced from guayule scrubs. In various embodiments, the method comprises extracting guayule plant material to form a miscella, fractionating the miscella to a preliminary cement, diluting the preliminary cement to a cement for dispersing, dispersing the cement in an aqueous surfactant mixture under high shear to produce an emulsion, and de-solventizing the emulsion to produce an aqueous latex dispersion. The rubber solids level can then be adjusted by centrifugation and dilution in water to produce a final aqueous cis-1,4-polyisoprene latex.