Patent ID: 11920014
Assignee: DOW GLOBAL TECHNOLOGIES LLC
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A method of forming a unit dose package, comprising:
providing a free standing film, comprising:
19 to 85 wt % of a partially hydrolyzed polyvinyl acetate;
5 to 70 wt % of a poly(ethylene oxide) having a weight average molecular weight of 20,000 to 2,000,000 Daltons;
1 to 35 wt % of a polyalkylene glycol having a weight average molecular weight of 250 to 5,300 Daltons;
0.5 to 25 wt % of a plasticizer;
1 to 7.5 wt % of a poly(isobutylene-co-maleic anhydride) copolymer, wherein the poly(isobutylene-co-maleic anhydride) copolymer is at least partially neutralized;
0.01 to 1.8 wt % of the polyvinyl pyrrolidone; and
0 to 10 wt % of an optional additive selected from the group consisting of a preservative, an antioxidant, a viscosity modifier, a solubility modifier, an antimicrobial agent, a builder, a chelating agent, a filler, an extender, a crosslinking agent, a defoamer, a salt, a lubricant, a release agent, an anti-blocking agent, a tackifier, a coalescent, a detackifying agent and a nanoparticle;

providing a sealing composition comprising:
69 to 98 wt % water;
1 to 30 wt % of a hydrogen bonding component selected from the group consisting of ethylene-1,2-diol; propane-1,3-diol; butane-1,4-diol; citric acid and mixtures thereof; and
1 to 30 wt % of a complex forming component selected from the group consisting of magnesium chloride, calcium chloride, lithium chloride and mixtures thereof;

applying the sealing composition to a first surface of the free standing film;
contacting a second surface of the free standing film with the sealing composition applied on the first surface to form a seal between the first surface and the second surface.