US 2016/0102278 A1 · Articles Comprising Water-Soluble Polyvinyl Alcohol Blend Film and Related Methods

Abstract

Articles that include water-soluble films and household care composition, where the films include 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.

Claims30

Dependent claims

An article comprising:

a. a water-soluble film comprising:
a polyvinyl alcohol (PVOH) resin blend comprising:
a first PVOH copolymer comprising a first anionic monomer unit, the first PVOH copolymer having a first level of incorporation (a1) of the first anionic monomer unit;
and
a second PVOH copolymer comprising a second anionic monomer unit, the second PVOH copolymer having a second level of incorporation (a2) of the second anionic monomer unit;
wherein a1−a2 is greater than zero, and the first anionic monomer unit and the second anionic monomer unit are the same or different;
and
b. a household care composition proximal to the water-soluble film.

5 more elements

An article comprising:

a. a water-soluble film comprising:
a polyvinyl alcohol (PVOH) resin blend comprising:
a first PVOH copolymer comprising a first anionic monomer unit;
and
a second PVOH copolymer comprising a second anionic monomer unit which is the same as or different from the first anionic monomer unit;
wherein the water-soluble film has the following property (a) and optionally at least one of the properties (b) and (c):
(a) the water-soluble film has a residue value of about 48 wt. % or less, preferably from about 12 wt. % to about 48 wt. %, as measured by the Dissolution Chamber Test;
(b) the water-soluble film has an average tensile strength value of at least about 33 MPa as measured by the Tensile Strength Test;
and
(c) the water-soluble film has a modulus value of at least about 12 N/mm2 as measured by the Modulus Test;
and
b. a household care composition proximal to the film.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application

14/881,190Filed 13 Oct 2015

Priority

13 Oct 2014

Published

14 Apr 2016

Term ends

Not estimatedThe source records don’t support an estimate.

Classification16 codes

C11D 17/042
Compositions releasably affixed on a substrate or incorporated into a dispensing means: water soluble or water disintegrable containers or…
C08F 216/06
Acyclic compounds: polyvinyl alcohol ; Vinyl alcohol
C08J 5/18
Manufacture of articles or shaped materials containing macromolecular substances: manufacture of films or sheets
C11D 17/043
Water soluble or water disintegrable containers or substrates containing cleaning compositions or additives for cleaning compositions: liquid or…

Articles Comprising Water-Soluble Polyvinyl Alcohol Blend Film and Related Methods

Life of this patent

Articles Comprising Water-Soluble Polyvinyl Alcohol Blend Film and Related Methods

Life of this patent

Abstract

Claims30