Super absorbent polymer recycling to pressure sensitive adhesives

US11739240B2 · kind B2 · utility

Assignee

• The Procter & Gamble Company · US

Inventors

• Dimitris Ioannis Collias · Mason, US
• Paul Zimmerman · Ann Arbor, US
• Paul Takunda Chazovachii · Ann Arbor, US
• Michael Robo · Ann Arbor, US
• Anne J. McNeil · Ann Arbor, US
• Neil Marsh · Ann Arbor, US
• Martin Ian James · Cincinnati, US

Key dates

• Filing date: Aug 24, 2020
• Grant date: Aug 29, 2023
• Expiry date: Jun 15, 2041

Classification

• Technology area (CPC —): General

Abstract

Methods for upcycling crosslinked sodium polyacrylate to pressure sensitive adhesives via (a) mechanochemical chain-shortening and esterification or (b) esterifying with high conversion with a Fischer esterification process are disclosed. Also disclosed is a pressure sensitive adhesive prepared by the disclosed methods and articles comprising the pressure sensitive adhesive, including, but not limited to, pressure sensitive tape, a bandage, a label, note pads, a decal, a stamp, an envelope, a sticker, packaging, automobile trim, and a film.