US 11,920,014 B2
Sealing compositions for water soluble films and methods of using
Gyongyi Gulyas, Lake Jackson, TX (US); An Kaga, Rosharon, TX (US); Thomas Fitzgibbons, Alvin, TX (US); Afua Sarpong Karikari, Bristol, PA (US); Michael C. Mitchell, King Prussia, PA (US); Xin Jin, Berwyn, PA (US); and Joseph Kao, Framingham, MA (US)
Assigned to Dow Global Technologies LLC, Midland, MI (US); and Rohm and Haas Company, Collegeville, PA (US)
Appl. No. 16/603,601
Filed by Dow Global Technologies LLC, Midland, MI (US); and Rohm and Haas Company, Collegeville, PA (US)
PCT Filed Apr. 19, 2018, PCT No. PCT/US2018/028287
§ 371(c)(1), (2) Date Oct. 8, 2019,
PCT Pub. No. WO2018/212899, PCT Pub. Date Nov. 22, 2018.
Claims priority of provisional application 62/508,405, filed on May 19, 2017.
Prior Publication US 2020/0062913 A1, Feb. 27, 2020
Int. Cl. C08J 7/06 (2006.01); C08J 5/12 (2006.01); C08K 3/34 (2006.01); C08K 5/00 (2006.01); C08L 23/22 (2006.01); C08L 29/14 (2006.01); C08L 37/00 (2006.01); C08L 39/06 (2006.01); C08L 71/02 (2006.01); C11D 17/04 (2006.01)
CPC C08J 7/065 (2013.01) [C08J 5/122 (2013.01); C08K 3/346 (2013.01); C08K 5/0016 (2013.01); C08L 23/22 (2013.01); C08L 29/14 (2013.01); C08L 37/00 (2013.01); C08L 39/06 (2013.01); C08L 71/02 (2013.01); C11D 17/042 (2013.01); C08J 2300/14 (2013.01); C08J 2329/04 (2013.01); C08J 2339/06 (2013.01); C08J 2371/02 (2013.01); C08J 2471/02 (2013.01)] 15 Claims
 
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.