Sulfopolyesters for paper strength and process
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
D21H-013/00
D21H-013/02
D21H-013/40
D21H-017/29
D21H-017/58
출원번호
US-0765461
(2010-04-22)
등록번호
US-8512519
(2013-08-20)
발명자
/ 주소
Gupta, Rakesh Kumar
Klosiewicz, Daniel William
Mitchell, Melvin Glenn
Mitchell, Marvin Lynn
출원인 / 주소
Eastman Chemical Company
대리인 / 주소
Owen, Polly C.
인용정보
피인용 횟수 :
12인용 특허 :
391
초록▼
Sulfopolyester thermoplastic resins provide advantages in papermaking processes and in paper products including paperboard. Improvements in wet strength and dry strength of paper products are achieved by addition of sulfopolyester thermoplastic resins and cationic strength additives during the paper
Sulfopolyester thermoplastic resins provide advantages in papermaking processes and in paper products including paperboard. Improvements in wet strength and dry strength of paper products are achieved by addition of sulfopolyester thermoplastic resins and cationic strength additives during the paper making process. The use of sulfopolyester thermoplastic resins in paper products also significantly enhances the repulpability of the paper.
대표청구항▼
1. A repulpable paper product comprising: papermaking fibers; a cationic strength additive; and a thermoplastic sulfopolyester resin, wherein the papermaking fibers are selected from woody fibers, softwood fibers, hardwood fibers, non-woody fibers, synthetic polymeric fibers, recycled fibers, glass
1. A repulpable paper product comprising: papermaking fibers; a cationic strength additive; and a thermoplastic sulfopolyester resin, wherein the papermaking fibers are selected from woody fibers, softwood fibers, hardwood fibers, non-woody fibers, synthetic polymeric fibers, recycled fibers, glass fibers, or combinations thereof,wherein the synthetic polymeric fibers are greater than 50% of the total papermaking fiber,wherein said synthetic polymeric fibers have a mean fiber diameter of less than 5 microns. 2. The repulpable paper products of claim 1 wherein the sulfopolyester resin comprises (i) residues of one or more dicarboxylic acids;(ii) about 4 to about 40 mole %, based on the total repeating units, of residues of at least one sulfomonomer having 2 functional groups and one or more sulfonate groups attached to an aromatic or cycloaliphatic ring wherein said functional groups are hydroxyl, carboxyl, or a combination thereof;(iii) one or more diol residues wherein at least 25 mole %, based on the total diol residues, is a poly(ethylene glycol) having a structure H—(OCH2—CH2)n—OH wherein n is an integer in the range of 2 to about 500; and(iv) 0 to about 25 mole %, based on the total repeating units, of residues of a branching monomer having 3 or more functional groups wherein said functional groups are hydroxyl, carboxyl, or a combination thereof. 3. The repulpable paper products of claim 2 wherein the dicarboxylic acids are selected from aliphatic diacids, cycloaliphatic dicarboxylic acids, aromatic dicarboxylic acids, and combinations thereof. 4. The repulpable paper products of claim 3 wherein the dicarboxylic acids are selected from succinic, glutaric, adipic, azelaic, sebacic, fumaric, maleic, itaconic, 1,3-cyclohexane dicarboxylic, 1,4-cyclohexanedicarboxylic, diglycolic, 2,5-norbornanedicarboxylic, phthalic, terephthallc, 1,4-naphthalenedlcarboxylic, 2,5-naphthalenedicarboxylic, 2,6-naphthalenedicarboxylic, 2,7-naphthalenedicarboxylic, diphenic, 4,4′-oxydibenzoic, 4,4′-sulfonyldibenzoic, isophthalic, and combinations thereof. 5. The repulpable paper products of claim 2 wherein the sulfomonomer is a metal sulfonate salt of a sulfophthalic acid, sulfoterephthalic acid, sulfoisophthalic acid, or combinations thereof. 6. The repulpable paper products of claim 2 wherein the diol residues are selected from ethylene glycol, diethylene glycol, triethylene glycol, poly(ethylene) glycols, 1,3-propanediol, 2,4-dimethyl-2-ethylhexane-1,3-diol, 2,2-dimethyl-1,3-propanediol, 2-ethyl-2-butyl-1,3-propanediol, 2-ethyl-2-isobutyl-1,3-propanediol, 1,3-butanedlol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 2,2,4-trimethyl-1,6-hexanediol, thiodiethanol, 1,2-cyclohexanedimethanol, 1,3-cyclohexanedimethanol, 1,4-cyclohexanedimethanol, 2,2,4,4-tetramethyl-1,3-cyclobutanediol, p-xylylenediol, and combinations thereof. 7. The repulpable paper products of claim 2 wherein the branching monomer is 1,1,1-trimethylol propane, 1,1,1-trimethylolethane, glycerin, pentaerythritol, erythritol, threitol, dipentaerythritol, sorbitol, trimellitic anhydride, pyromellitic dianhydride, dimethylol propionic acid, or combinations thereof. 8. The repulpable paper products of claim 1 wherein the cationic strength additive is selected from polyacrylamide resins, polyamide epihalohydrin resins, polyamine epihalohydrin resins, polyamidoamine epichalohydrin resins, polyalkyleneimine resins, urea-formaldehyde resins, melamine-formaldehyde resins, cationic polysaccharides or combinations thereof. 9. The repulpable paper products of claim 8 wherein the cationic strength additive is selected from cationic glyoxylated polyacrylamide resins or polyamidoamine epichlorohydrin resins. 10. The repulpable paper products according to claim 1 wherein the synthetic polymer fibers are greater than 70% of the total papermaking fiber. 11. The repulpable paper products of claim 1 wherein the amount of cationic strength additive is about 0.25 weight % to about 3 weight % on a dry basis and the amount of thermoplastic sulfopolyester resin is about 0.25 to about 3.00 weight %, on a dry basis relative to the weight of the dried paper product. 12. The repulpable paper products of claim 1 wherein the amount of cationic strength additive is about 0.25 weight % to about 2 weight % on a dry basis and the amount of thermoplastic sulfopolyester resin is about 0.25 to about 2 weight %, on a dry basis relative to the weight of the dried paper product. 13. The repulpable paper product of claim 1 wherein the amounts of cationic strength additive is about 0.25 weight to about 1.5 weight % on a dry basis and the amount of thermoplastic sulfopolyester resin is about 0.25 to about 1.5 weight %, on a dry basis relative to the weight of the dried paper product. 14. The repulpable paper products of claim 1 wherein the ratio of thermoplastic sulfopolyester resin to cationic strength additive is about 5:1 to about 1:5. 15. The repulpable paper products of claim 1 wherein the ratio of sulfopolyester to cationic strength additive is about 1:1. 16. A method of improving the wet-strength of cellulosic paper comprising adding a cationic strength additive and a sulfopolyester thermoplastic resin to papermaking fibers during the papermaking process; wherein the papermaking fibers are selected from woody fibers, softwood fibers, hardwood fibers, non-woody fibers, synthetic polymeric fibers, recycled fibers, glass fibers, or combinations thereof,wherein the synthetic polymeric fibers are greater than 50% of the total papermaking fiber,wherein said synthetic polymeric fibers have a mean fiber diameter of less than 5 microns, and wherein the paper comprises said papermaking fibers, said cationic strength additive and said sulfopolyester thermoplastic resin. 17. The method of claim 16 wherein the cationic strength additive and sulfopolyester thermoplastic resin are added to an aqueous slurry of papermaking fibers during the papermaking process. 18. The method of claim 16 wherein said cationic strength additive is added to an aqueous slurry of papermaking fibers and the sulfopolyester thermoplastic resin is applied onto a paper web resulting from the dewatering of said papermaking fibers. 19. The method of claim 18 wherein the thermoplastic sulfopolyester resin is applied to the paper web by spray application. 20. The method of claim 16 wherein the resulting paper products exhibit enhanced repulpability. 21. A paper product comprising: papermaking fibers consisting of one or more of woody fibers, softwood fibers, hardwood fibers, non-woody fibers, synthetic polymeric fibers, recycled fibers, or glass fibers;cationic strength additives consisting of one or more of polyacrylamide resins, polyamide epihalohydrin resins, polyamine epihalohydrin resins, polyamidoamine epichalohydrin resins, polyalkyleneimine resins, urea-formaldehyde resins, melamine-formaldehyde resins, or cationic polysaccharides; andthermoplastic sulfopolyester resins comprising (i) residues of one or more dicarboxylic acids;(ii) about 4 to about 40 mole %, based on the total repeating units, of residues of at least one sulfomonomer having 2 functional groups and one or more sulfonate groups attached to an aromatic or cycloaliphatic ring wherein said functional groups are hydroxyl, carboxyl, or a combination thereof;(iii) one or more diol residues wherein at least 25 mole %, based on the total diol residues, is a poly(ethylene glycol) having a structure H—(OCH2—CH2)n—OH wherein n is an integer in the range of 2 to about 500; and(iv) 0 to about 25 mole %, based on the total repeating units, of residues of a branching monomer having 3 or more functional groups wherein said functional groups are hydroxyl, carboxyl, or a combination thereof,wherein the synthetic polymeric fibers are greater than 50% of the total papermaking fiber,wherein said synthetic polymeric fibers have a mean fiber diameter of less than 5 microns.
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Williams Richard C. ; Goettmann James A. ; Funk Gerald L. ; Gee Linda M. ; Smith Roland ; Connolly Timothy ; Mathur Ashish, Wet-laid nonwoven nylon battery separator material.
Clark, Mark Dwight; Dema, Keh; Sohn, Sungkyun; Smith, Ernest Phillip; Anderson, Chris Delbert; Everett, Charles Stuart, Paper and nonwoven articles comprising synthetic microfiber binders.
Clark, Mark Dwight; Dema, Keh; Sohn, Sungkyun; Smith, Ernest Phillip; Anderson, Chris Delbert; Everett, Charles Stuart, Process for making paper and nonwoven articles comprising synthetic microfiber binders.
Gupta, Rakesh Kumar; George, Scott Ellery; Klosiewicz, Daniel William; Seo, Kab Sik; Fleenor, Coralie McKenna; Crain, Allen Lynn, Process of making water-dispersible multicomponent fibers from sulfopolyesters.
Parker, Kenny Randolph; Klosiewicz, Daniel William; Munjal, Ramesh Chand; Rogers, David J; Tremaine, Dustin A, Processes to produce short cut microfibers.
Parker, Kenny Randolph; Klosiewicz, Daniel William; Munjal, Ramesh Chand; Rogers, Jr., David J.; Tremaine, Dustin A, Processes to produce short cut microfibers.
Parker, Kenny Randolph; Klosiewicz, Daniel William; Munjal, Ramesh Chand; Rogers, Jr., David J; Tremaine, Dustin A, Processes to produce short cut microfibers.
Parker, Kenny Randolph; Klosiewicz, Daniel William; Munjal, Ramesh Chand; Rogers, Jr., David J; Tremaine, Dustin A, Processes to produce short cut microfibers.
Parker, Kenny Randolph; Klosiewicz, Daniel William; Munjal, Ramesh Chand; Rogers, Jr., David J; Tremaine, Dustin A, Processes to produce short cut microfibers.
Parker, Kenny Randolph; Klosiewicz, Daniel William; Munjal, Ramesh Chand; Rogers, David J.; Tremaine, Dustin A., Processes to produce short-cut microfibers.
Gupta, Rakesh Kumar; Mitchell, Melvin Glenn; Klosiewicz, Daniel William; Clark, Mark Dwight; Anderson, Chris Delbert; Mitchell, Marvin Lynn; Mitchell, Paula Hines; Wolfe, Amber Layne, Wet-Laid process to produce a bound nonwoven article.
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