公开(公告)号：US20180037679A1

公开(公告)日：2018-02-08

申请号：US15553841

申请日：2016-02-15

Applicant: SABIC Global Technologies B.V.

Inventor： Shi Wang ,  Jianhua Xu ,  Vern Lowry

IPC: C08F6/22 ,  C08K3/16 ,  C08K5/3492

Abstract: Disclosed herein are methods of preparing a polymeric latex as the intermediary of a polymerization process. The disclosed methods further provide treatments for preventing biological growth on latex during storage extended storage at elevated temperatures.

公开(公告)号：US10421826B2

公开(公告)日：2019-09-24

申请号：US15553841

申请日：2016-02-15

Applicant: SABIC Global Technologies B.V.

Inventor： Shi Wang ,  Jianhua Xu ,  Vern Lowry

IPC: C08F6/22 ,  C08F6/00 ,  C08K5/00 ,  C08F279/04 ,  C08K3/16 ,  C08K5/3492

Abstract: A method for providing a resin having minimal discoloration comprises combining, in a reactor or a reactor vessel, monomers, an emulsifier or surfactant, and an initiator in solution to form a polymeric latex; directing the polymeric latex into a storage system comprising a storage vessel; maintaining the latex in the storage vessel for an aging time and ensuring that the polymeric latex exhibits less than 1000 CFU/ml of biological growth according to ASTM D 5465-93 (2012) upon completion of the aging time; and coagulating the polymeric latex, wherein the polymeric latex is exposed to a mixture of water and a coagulant and filtered to provide a resin.

公开(公告)号：US20190169320A1

公开(公告)日：2019-06-06

申请号：US16324254

申请日：2017-07-10

Applicant: SABIC Global Technologies B.V.

Inventor： Shi Wang ,  Jianhua Xu ,  Vern Lowry

IPC: C08F2/24 ,  C08F6/22 ,  C08F279/04 ,  C08K5/47 ,  C08L55/02

Abstract: The present invention relates to a process for the production of a polymer comprising the steps of: a) polymerisation of an emulsion comprising a reaction mixture to obtain a polymeric latex; and b) coagulating the polymeric latex by exposing the polymeric latex to one or more coagulant, and isolating the coagulated product to obtain a polymer; wherein the polymeric latex obtained under a) is stored prior to coagulation step b) for at most such a time that the polymeric latex contains ≤500 CFU/ml of pigment-producing organisms as determined in accordance with ASTM D 5465-93 (2012) when subjecting the polymeric latex to coagulation step b). Such process allows for the production of a polymer having a reduced discoloration. The polymers may have a desirable appearance such as an opaque, white appearance.