Water-soluble polyvinyl alcohol film with plasticizer blend, related methods, and related articles
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C11D-017/04
C08L-029/04
C08K-005/053
C08L-101/14
C08J-005/18
C11D-003/37
출원번호
16703105
(2019-12-04)
등록번호
11168289
(2021-11-09)
발명자
/ 주소
Friedrich, Steven G.
Lee, David M.
Labeque, Regine
Courchay, Florence Catherine
출원인 / 주소
MONOSOL, LLC
대리인 / 주소
Marshall, Gerstein & Borun LLP
인용정보
피인용 횟수 :
0인용 특허 :
0
초록▼
Disclosed herein are water-soluble films including a polyvinyl alcohol (PVOH) polymer and a combination of at least three plasticizers. The combination of plasticizers includes dipropylene glycol as a first plasticizer, a sugar alcohol such as sorbitol as a second plasticizer, and a polyol such as g
Disclosed herein are water-soluble films including a polyvinyl alcohol (PVOH) polymer and a combination of at least three plasticizers. The combination of plasticizers includes dipropylene glycol as a first plasticizer, a sugar alcohol such as sorbitol as a second plasticizer, and a polyol such as glycerin as a third plasticizer. When the PVOH polymer and plasticizers 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 beneficial combinations four) of aged tensile strength, aged melting transition delta elevation, aged adhesion value, and/or resistance to seal peeling, which provide strong film seals that retain their water-solubility characteristics.
대표청구항▼
1. A water-soluble film comprising: a polyvinyl alcohol (PVOH) polymer;dipropylene glycol as a first plasticizer;a sugar alcohol as a second plasticizer, the sugar alcohol being selected from the group consisting of isomalt, maltitol, sorbitol, xylitol, erythritol, adonitol, dulcitol, pentaerythrito
1. A water-soluble film comprising: a polyvinyl alcohol (PVOH) polymer;dipropylene glycol as a first plasticizer;a sugar alcohol as a second plasticizer, the sugar alcohol being selected from the group consisting of isomalt, maltitol, sorbitol, xylitol, erythritol, adonitol, dulcitol, pentaerythritol, and mannitol; anda polyol as a third plasticizer, the third plasticizer being different from the first plasticizer and the second plasticizer and being selected from the group consisting of glycerin, diglycerin, ethylene glycol, diethylene glycol, triethyleneglycol, tetraethylene glycol, polyethylene glycols up to 400 MW, neopentyl glycol, propylene glycol, 2-methyl-1,3-propanediol, trimethylolpropane, and polyether polyols;wherein the first, second, and third plasticizers are present in the water-soluble film in a combined amount in a range of 5 parts to 50 parts total plasticizer per 100 parts total resin (phr) in the water-soluble film; andwherein the water-soluble film has at least two of the three properties (a), (b), and (c): (a) an aged melting transition delta elevation of 12° C. or less as measured by the Aged Melting Transition Delta Test;(b) an aged adhesion value of at least 1300 g/s as measured by the Aged Adhesion Test; and(c) an aged tensile strength of at least 25 MPa as measured by the Aged Tensile Strength Test. 2. The water-soluble film of claim 1, wherein the sugar alcohol is sorbitol. 3. The water-soluble film of claim 1, wherein the polyol is glycerin. 4. The water-soluble film of claim 1, wherein the sugar alcohol is sorbitol, and the polyol is glycerin. 5. The water-soluble film of claim 1, wherein the water-soluble film is substantially free from plasticizers other than the first, second, and third plasticizers. 6. The water-soluble film of claim 1, wherein the water-soluble film comprises a solid plasticizer which has a melting point above 50° C. 7. The water-soluble film of claim 6, wherein the solid plasticizer is also the second plasticizer. 8. The water-soluble film of claim 1, wherein the first, second, and third plasticizers are present in the water-soluble film in a combined amount in a range of 5 parts to 40 parts total plasticizer per 100 parts total resin (phr) in the water-soluble film. 9. The water-soluble film of claim 8, wherein the first, second, and third plasticizers are present in the water-soluble film in a combined amount in a range of 10 phr to 40 phr. 10. The water-soluble film of claim 8, wherein the first, second, and third plasticizers are present in the water-soluble film in a combined amount in a range of 20 phr to 35 phr. 11. A water-soluble film comprising: a polyvinyl alcohol (PVOH) polymer;dipropylene glycol as a first plasticizer;a sugar alcohol as a second plasticizer, the sugar alcohol being selected from the group consisting of isomalt, maltitol, sorbitol, xylitol, erythritol, adonitol, dulcitol, pentaerythritol, and mannitol; anda polyol as a third plasticizer, the third plasticizer being different from the first plasticizer and the second plasticizer and being selected from the group consisting of glycerin, diglycerin, ethylene glycol, diethylene glycol, triethyleneglycol, tetraethylene glycol, polyethylene glycols up to 400 MW, neopentyl glycol, propylene glycol, 2-methyl-1,3-propanediol, trimethylolpropane, and polyether polyols;wherein: the first, second, and third plasticizers are present in the water-soluble film in a combined amount in a range of 5 parts to 50 parts total plasticizer per 100 parts total resin (phr) in the water-soluble film;the water-soluble film has an aged tensile strength of at least 25 MPa as measured by the Aged Tensile Strength Test; andthe water-soluble film has a seal tear value of at least 170% as measured by the Sum Seal Tear Test. 12. The water-soluble film of claim 11, wherein the water-soluble film has an aged tensile strength of at least 30 MPa as measured by the Aged Tensile Strength Test. 13. The water-soluble film of claim 11, wherein: the first plasticizer is present in the water-soluble film in an amount in a range of 10 wt. % to 40 wt. % relative to the combined amount of the first, second, and third plasticizers in the water-soluble film;the second plasticizer is present in the water-soluble film in an amount in a range of 10 wt. % to 30 wt. % relative to the combined amount of the first, second, and third plasticizers in the water-soluble film; andthe third plasticizer is present in the water-soluble film in an amount in a range of 40 wt. % to 70 wt. % relative to the combined amount of the first, second, and third plasticizers in the water-soluble film. 14. The water-soluble film of claim 1, wherein: the first plasticizer is present in the water-soluble film in an amount in a range of 10 wt. % to 65 wt. % relative to the combined amount of the first, second, and third plasticizers in the water-soluble film. 15. The water-soluble film of claim 1, wherein: the second plasticizer is present in the water-soluble film in an amount in a range of 10 wt. % to 65 wt. % relative to the combined amount of the first, second, and third plasticizers in the water-soluble film. 16. The water-soluble film of claim 1, wherein: the third plasticizer is present in the water-soluble film in an amount in a range of 25 wt. % to 80 wt. % relative to the combined amount of the first, second, and third plasticizers in the water-soluble film. 17. The water-soluble film of claim 1, wherein: the first plasticizer is present in the water-soluble film in an amount in a range of 13 wt. % to 46 wt. % relative to the combined amount of the first, second, and third plasticizers in the water-soluble film;the second plasticizer is present in the water-soluble film in an amount in a range of 13 wt. % to 58 wt. % relative to the combined amount of the first, second, and third plasticizers in the water-soluble film; andthe third plasticizer is present in the water-soluble film in an amount in a range of 28 wt. % to 73 wt. % relative to the combined amount of the first, second, and third plasticizers in the water-soluble film. 18. The water-soluble film of claim 1, wherein: the first plasticizer is present in the water-soluble film in an amount in a range of 13 wt. % to 38 wt. % relative to the combined amount of the first, second, and third plasticizers in the water-soluble film;the second plasticizer is present in the water-soluble film in an amount in a range of 16 wt. % to 58 wt. % relative to the combined amount of the first, second, and third plasticizers in the water-soluble film; andthe third plasticizer is present in the water-soluble film in an amount in a range of 28 wt. % to 71 wt. % relative to the combined amount of the first, second, and third plasticizers in the water-soluble film. 19. The water-soluble film of claim 1, wherein: the first plasticizer is present in the water-soluble film in an amount in a range of 13 wt. % to 58 wt. % relative to the combined amount of the first, second, and third plasticizers in the water-soluble film;the second plasticizer is present in the water-soluble film in an amount in a range of 13 wt. % to 58 wt. % relative to the combined amount of the first, second, and third plasticizers in the water-soluble film; andthe third plasticizer is present in the water-soluble film in an amount in a range of 28 wt. % to 73 wt. % relative to the combined amount of the first, second, and third plasticizers in the water-soluble film. 20. The water-soluble film of claim 1, wherein: the first plasticizer is present in the water-soluble film in an amount in a range of 13 wt. % to 50 wt. % relative to the combined amount of the first, second, and third plasticizers in the water-soluble film;the second plasticizer is present in the water-soluble film in an amount in a range of 13 wt. % to 50 wt. % relative to the combined amount of the first, second, and third plasticizers in the water-soluble film; andthe third plasticizer is present in the water-soluble film in an amount in a range of 36 wt. % to 73 wt. % relative to the combined amount of the first, second, and third plasticizers in the water-soluble film. 21. The water-soluble film of claim 1, wherein: the first plasticizer is present in the water-soluble film in an amount in a range of 13 wt. % to 45 wt. % relative to the combined amount of the first, second, and third plasticizers in the water-soluble film;the second plasticizer is present in the water-soluble film in an amount in a range of 19 wt. % to 52 wt. % relative to the combined amount of the first, second, and third plasticizers in the water-soluble film; andthe third plasticizer is present in the water-soluble film in an amount in a range of 35 wt. % to 65 wt. % relative to the combined amount of the first, second, and third plasticizers in the water-soluble film. 22. The water-soluble film of claim 1, wherein: the first plasticizer is present in the water-soluble film in an amount in a range of 13 wt. % to 39 wt. % relative to the combined amount of the first, second, and third plasticizers in the water-soluble film;the second plasticizer is present in the water-soluble film in an amount in a range of 22 wt. % to 38 wt. % relative to the combined amount of the first, second, and third plasticizers in the water-soluble film; andthe third plasticizer is present in the water-soluble film in an amount in a range of 39 wt. % to 64 wt. % relative to the combined amount of the first, second, and third plasticizers in the water-soluble film. 23. The water-soluble film of claim 1, wherein: the first plasticizer is present in the water-soluble film in an amount in a range of 13 wt. % to 19 wt. % relative to the combined amount of the first, second, and third plasticizers in the water-soluble film;the second plasticizer is present in the water-soluble film in an amount in a range of 41 wt. % to 52 wt. % relative to the combined amount of the first, second, and third plasticizers in the water-soluble film; andthe third plasticizer is present in the water-soluble film in an amount in a range of 35 wt. % to 44 wt. % relative to the combined amount of the first, second, and third plasticizers in the water-soluble film. 24. The water-soluble film of claim 1, wherein the water-soluble film has at least two of the three properties (a), (b), and (c): (a) an aged melting transition delta elevation of 11° C. or less as measured by the Aged Melting Transition Delta Test;(b) an aged adhesion value of at least 1900 g/s as measured by the Aged Adhesion Test; and(c) an aged tensile strength of at least 30 MPa as measured by the Aged Tensile Strength Test. 25. The water-soluble film of claim 1, wherein the water-soluble film has at least two of the three properties (a), (b), and (c): (a) an aged melting transition delta elevation of 11° C. or less as measured by the Aged Melting Transition Delta Test;(b) an aged adhesion value of at least 2500 g/s as measured by the Aged Adhesion Test; and(c) an aged tensile strength of at least 32.5 MPa as measured by the Aged Tensile Strength Test. 26. The water-soluble film of claim 1, wherein: the water-soluble film has all three of the properties (a), (b), and (c); andthe first, second, and third plasticizers are present in the water-soluble film in a combined amount in a range of 10 phr to 40 phr. 27. The water-soluble film of claim 1, wherein the water-soluble film further comprises one or more components selected from the group consisting of plasticizers other than the first, second, and third plasticizers, plasticizer compatibilizers, lubricants, release agents, fillers, extenders, cross-linking agents, antiblocking agents, antioxidants, detackifying agents, antifoams, nanoparticles, bleaching agents, surfactants, and combinations thereof. 28. The water-soluble film of claim 1, wherein the PVOH polymer comprises a PVOH homopolymer consisting essentially of vinyl alcohol monomer units and optionally vinyl acetate monomer units. 29. The water-soluble film of claim 1, wherein the PVOH polymer comprises a PVOH copolymer comprising an anionic monomer unit, a vinyl alcohol monomer unit, and optionally a vinyl acetate monomer unit. 30. The water-soluble film of claim 1, wherein the PVOH polymer comprises a PVOH copolymer comprising a vinyl alcohol monomer unit, optionally a vinyl acetate monomer unit, and a comonomer unit selected from the group consisting of vinyl acetic acid, maleic acid, monoalkyl maleate, dialkyl maleate, monomethyl maleate, dimethyl maleate, maleic anyhydride, fumaric acid, monoalkyl fumarate, dialkyl fumarate, monomethyl fumarate, dimethyl fumarate, fumaric anyhydride, itaconic acid, monomethyl itaconate, dimethyl itaconate, itaconic anhydride, vinyl sulfonic acid, allyl sulfonic acid, ethylene sulfonic acid, 2-acrylamido-1-methylpropanesulfonic acid, 2-acrylamido-2-methylpropanesulfonic acid, 2-methylacrylamido-2-methylpropanesulfonic acid, 2-sufoethyl acrylate, alkali metal salts of the foregoing, esters of the foregoing, and combinations thereof. 31. The water-soluble film of claim 1, wherein the PVOH polymer comprises a PVOH copolymer comprising a vinyl alcohol monomer unit, optionally a vinyl acetate monomer unit, and a comonomer unit selected from the group consisting of acrylamido methylpropanesulfonic acids, alkali metal salts thereof, and combinations thereof. 32. The water-soluble film of claim 1, wherein the PVOH polymer comprises a PVOH copolymer comprising a vinyl alcohol monomer unit, optionally a vinyl acetate monomer unit, and a comonomer unit selected from the group consisting of monomethyl maleate, alkali metal salts thereof, and combinations thereof. 33. The water-soluble film of claim 1, wherein the PVOH polymer comprises a polymer blend comprising two or more different PVOH homopolymers. 34. The water-soluble film of claim 1, wherein the PVOH polymer comprises a polymer blend comprising two or more different PVOH copolymers. 35. The water-soluble film of claim 34, wherein the polymer blend comprises a first PVOH copolymer comprising a first anionic monomer unit, and a second PVOH copolymer comprising a second anionic monomer unit different from the first anionic monomer unit. 36. The water-soluble film of claim 34, wherein: the polymer blend comprises a first PVOH copolymer and a second PVOH copolymer;the first PVOH copolymer comprises a first comonomer unit selected from the group consisting of acrylamido methylpropanesulfonic acids, alkali metal salts thereof, and combinations thereof; andthe second PVOH copolymer comprises a second comonomer unit selected from the group consisting of monomethyl maleate, alkali metal salts thereof, and combinations thereof. 37. The water-soluble film of claim 36, wherein: the first PVOH copolymer is present in an amount in a range of 10 wt. % to 80 wt. % of total PVOH polymers in the film; andthe second PVOH copolymer is present in an amount in a range of 20 wt. % to 90 wt. % of total PVOH polymers in the film. 38. The water-soluble film of claim 1, wherein the PVOH polymer has a degree of hydrolysis in a range of 75% to 99%. 39. The water-soluble film of claim 1, wherein the PVOH polymer has a 4% solution viscosity at 20° C. in a range of 4 cP to 24 cP. 40. The water-soluble film of claim 1, wherein the water-soluble film further comprises a water-soluble polymer which is other than a PVOH polymer. 41. The water-soluble film of claim 40, wherein the water-soluble polymer is selected from the group consisting of polyethyleneimines, polyvinyl pyrrolidones, polyalkylene oxides, polyacrylamides, cellulose ethers, cellulose esters, cellulose amides, polyvinyl acetates, polyamides, gelatines, methylcelluloses, carboxymethylcelluloses and salts thereof, dextrins, ethylcelluloses, hydroxyethyl celluloses, hydroxypropyl methylcelluloses, maltodextrins, starches, modified starches, guar gum, gum Acacia, xanthan gum, carrageenan, polyacrylates and salts thereof, copolymers thereof, blends thereof, and combinations thereof. 42. An article comprising: a water-soluble film of claim 1 comprising a first surface of said film solvent-sealed to a second surface of the same film or to a surface of a second film of claim 1. 43. An article comprising: a water-soluble film of claim 1 in the form of a pouch defining an interior pouch volume. 44. The article of claim 43, further comprising a composition contained in the interior pouch volume. 45. The water-soluble film of claim 1, wherein: the first plasticizer is present in the water-soluble film in an amount in a range of 10 wt. % to 80 wt. % relative to the combined amount of the first, second, and third plasticizers in the water-soluble film;the second plasticizer is present in the water-soluble film in an amount in a range of 10 wt. % to 80 wt. % relative to the combined amount of the first, second, and third plasticizers in the water-soluble film; andthe third plasticizer is present in the water-soluble film in an amount in a range of 10 wt. % to 80 wt. % relative to the combined amount of the first, second, and third plasticizers in the water-soluble film. 46. The water-soluble film of claim 13, wherein the sugar alcohol is sorbitol, and the polyol is glycerin.
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