Water-soluble polyvinyl alcohol blend film, related methods, and related articles

US10526479B2 · kind B2 · utility

Assignee

• MONOSOL, LLC · US

Inventors

• Steven G. Friedrich · Crown Point, US
• David M. Lee · Los Alamos, US
• Thomas J. Yogan · Valparaiso, US
• Regine Labeque · Neder-Over-Heembeek, BE
• Florence Catherine Courchay · Brussels, BE
• Robby Renilde Francois Keuleers · Lippelo, BE

Key dates

• Filing date: Oct 13, 2015
• Grant date: Jan 7, 2020
• Expiry date: Oct 13, 2035

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2205/03
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Disclosed herein are water-soluble films including a polyvinyl alcohol (PVOH) resin blend and optionally one or more additional components such as plasticizers, fillers, surfactants, and other additives. The PVOH resin blend includes a PVOH copolymer including one or more types of anionic monomer units such as a PVOH terpolymer and a PVOH polymer such as another PVOH anionic copolymer or a partially or completely hydrolyzed PVOH homopolymer. When the PVOH copolymer and PVOH polymer are blended in particular proportions and/or selected with regard to various criteria related to physical and chemical film properties, the resulting water-soluble film formed from the PVOH resin blend exhibits substantially improved aqueous dissolution properties, tensile strength properties, and/or tensile modulus properties.