Back to results
US 12,398,251 B2Granted
Water soluble unit dose film for packaging harsh chemicals
AssigneeMonosol, LLC
InventorJonathon Knight
Life of this patent
Estimating the term…
Abstract
Disclosed herein are water-soluble films and/or water soluble unit dose articles comprising a water soluble mixture comprising a polyvinyl alcohol (PVOH) and a polyvinylpyrrolidone (PVP), and methods of making and using the same.
Claims25
A water soluble film comprising:
- a water soluble mixture of a polyvinyl alcohol (PVOH) and a polyvinylpyrrolidone (PVP),
- wherein the PVOH and the PVP are present in a ratio of about 3:1 by weight to about 19:1 by weight, respectively, and the PVOH comprises an 2-acrylamide-2-methylpropanesulfonic acid (AMPS) modified PVOH or a maleate modified PVOH,
- wherein the PVP has a weight average molecular weight in the range of 500,000 g/mol to 4 million g/mol,
- wherein the PVOH has a degree of modification in a range of about 1.5 mol % to about 4 mol %, and
- wherein the water soluble film defines an interior pouch volume containing within the interior pouch a composition that is one or more of a hypochlorite, calcium hypochlorite, hypochlorous acid, a halogenated isocyanurate, a chlorate, a chlorite, a perchlorate, a bromate, a perbromate, a halogenated hydantoin, a perborate, a periodate, a persulfate, a permanganate, a chromate, a dichromate, a nitrate, a nitrite, a peroxide, a ketone peroxide, a peroxy acid, citric acid, muriatic acid, and an inorganic acid that is one or more of sodium bisulfate (SBS), cyanuric acid, dichloroisocyanuric acid, and trichloroisocyanuric acid (TCCA).
2 more elements
A water soluble film comprising:
- a water soluble mixture of:
- a maleate modified polyvinyl alcohol (PVOH), a polyvinylpyrrolidone (PVP), a plasticizer, and an antioxidant,
- wherein the maleate modified PVOH and the PVP are present in a weight ratio of about 6.5:1 to about 7.5:1, respectively, the maleate modified PVOH comprises a maleate monomer unit present in an amount of about 1.8 mol %, the maleate modified PVOH comprises about 2 pendant carboxylate groups per maleate monomer unit, the polyvinylpyrrolidone PVP has a weight average molecular weight in a range of 1.2 million g/mol to 3 million g/mol, the plasticizer comprises about 2 PHR to about 10 PHR glycerin and about 2 PHR to about 10 PHR trimethylolpropane, the antioxidant comprises gallic acid and sodium metabisulfite, and a total amount of the antioxidant present is about 2 PHR to about 7 PHR, and
- wherein the water soluble film defines an interior pouch volume containing within the interior pouch a composition that is one or more of a hypochlorite, calcium hypochlorite, hypochlorous acid, a halogenated isocyanurate, a chlorate, a chlorite, a perchlorate, a bromate, a per bromate, a halogenated hydantoin, a perborate, a periodate, a persulfate, a permanganate, a chromate, a dichromate, a nitrate, a nitrite, a peroxide, a ketone peroxide, a peroxy acid, citric acid, muriatic acid, and an inorganic acid that is one or more of sodium bisulfate (SBS), cyanuric acid, dichloroisocyanuric acid, and trichloroisocyanuric acid (TCCA).
1 more element
Dependencies are inferred from the claim text.