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：US20250100187A1

公开(公告)日：2025-03-27

申请号：US18723692

申请日：2022-12-12

Applicant: SABIC GLOBAL TECHNOLOGIES B.V.

Inventor： Nasser Mansour Alsubaie ,  Ahmed Abouelfetouh Youssef ,  Allen Lee White ,  Ahmed Ragab Elshokafy ,  Shi Wang

IPC: B29B9/16 ,  B29B9/12 ,  B29B15/04

Abstract: A method of manufacturing a particulate polymer includes introducing a polymer latex into a vessel; distributing the polymer latex in the vessel to a coagulator via a distribution member and a redistribution member; introducing a coagulant and steam into the coagulator; breaking the polymer latex; and separating the particulate polymer. The distribution member and the redistribution member are mounted on an agitator shaft of the coagulator, and are configured such that the polymer latex in the vessel enters the open top and exits the open bottom of the distribution member and flows into the redistribution member. The polymer latex in the redistribution member then overflows into the coagulator.

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.