公开(公告)号：US20230142343A1

公开(公告)日：2023-05-11

申请号：US17918586

申请日：2021-06-01

Applicant: Arkema Inc.

Inventor： Sangwoo PARK

IPC: C08G81/02

CPC classification number: C08G81/025

Abstract: The removal of mercaptans from polymer compositions is described, where removal occurs by at least one of: contacting the polymer composition with a radical initiator that reacts with the mercaptain compound to form a non-odorous compound; and contacting the polymer composition with a transition metal that immobilizes the mercaptan compound.

公开(公告)号：US20240043622A1

公开(公告)日：2024-02-08

申请号：US18019494

申请日：2021-08-03

Applicant: Arkema Inc.

Inventor： Sangwoo PARK ,  Andrew POLLI

IPC: C08G75/14

CPC classification number: C08G75/14

Abstract: This process for synthesizing thiopolymers involves feeding elemental sulfur or sulfides and unsaturated hydrocarbons into an extruder. The extruder is comprised of a screw and a barrel. The screw is rotated so as to pressurize, heat and mix the sulfur or sulfides and unsaturated hydrocarbon to induce inverse vulcanization thereby producing thiopolymers such as polymeric polysulfides. The invented process can be accomplished by using sulfur which becomes molten at the conditions in the extruder or is preheated and unsaturated hydrocarbons as the starting material. The materials are fed through one or more extruders so as to induce mixing and reaction of the materials forming polysulfides.