公开(公告)号：US20230272180A1

公开(公告)日：2023-08-31

申请号：US18016087

申请日：2021-07-06

Applicant: DOW GLOBAL TECHNOLOGIES LLC

Inventor： Craig F. GORIN ,  David L. MALOTKY ,  Daniel L. DERMODY ,  Christopher J. TUCKER ,  Jin WANG ,  Anurima SINGH ,  Jill M. MARTIN ,  Thomas TOMCZAK ,  Hari KATEPALLI

IPC: C08J11/06 ,  B01D11/02 ,  B29B17/02 ,  B29B13/02

CPC classification number: C08J11/06 ,  B01D11/0226 ,  B01D11/0288 ,  B29B17/02 ,  B29B13/022 ,  C08J2323/06 ,  B29B2013/002

Abstract: A method for reducing an amount of a contaminant in a thermoplastic polymer comprising shearing a combination comprising a contaminated thermoplastic polymer in melt form, water, and a dispersing agent where the shearing causes a portion of the contaminant to be removed from the contaminated thermoplastic polymer (e.g. moved into an aqueous phase with the water or into another separate phase from the water and the polymer), and after shearing, separating the thermoplastic from the aqueous phase to recover thermoplastic polymer.

公开(公告)号：US20220306890A1

公开(公告)日：2022-09-29

申请号：US17635446

申请日：2020-10-07

Applicant: DOW GLOBAL TECHNOLOGIES LLC

Inventor： Craig F. GORIN ,  Jun LI ,  Piyush THAKRE ,  Yongchao ZENG

IPC: C09D123/06 ,  B33Y70/00

Abstract: A method comprising, (i) providing a thermoplastic material comprising 5-75 wt % of a post-consumer recycled polyolefin composition and 25-95 wt % of an olefin block copolymer composition based on total weight of the thermoplastic material, wherein the post-consumer recycled polyolefin composition comprises at least 50 wt %, of a polyolefin and at least 0.1 wt % of a contaminant; (ii) heating and dispensing said thermoplastic material through a nozzle to form an extrudate deposited on a base, (iii) moving the base, nozzle or combination thereof while dispensing the thermoplastic material so that there is horizontal displacement between the base and nozzle in a predetermined pattern to form an initial layer of the material on the base, and (iv) repeating steps (ii) and (iii) to form a subsequent layer of the material adhered on the initial layer, and (v) optionally repeating step steps (ii) and (iii) to form additional subsequent layers.