Compositions and processes for paper production
원문보기
IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0490738
(2006-07-21)
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등록번호 |
US7914646
(2011-03-15)
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발명자
/ 주소 |
- Duggirala, Prasad Y.
- Shevchenko, Sergey M.
- Broadus, Katherine M.
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
8 인용 특허 :
0 |
초록
▼
Oxidative compositions and processes that preserve and enhance the brightness and improve color of pulp or paper when applied during different stages of the papermaking process are identified. The oxidative composition and method maintains and/or enhances brightness, prevents yellowing, and enhances
Oxidative compositions and processes that preserve and enhance the brightness and improve color of pulp or paper when applied during different stages of the papermaking process are identified. The oxidative composition and method maintains and/or enhances brightness, prevents yellowing, and enhances the performance of paper products. Used in combination with optical brighteners and/or chelants the oxidative agents produce a synergistic effect not previously identified in the paper process.
대표청구항
▼
The invention claimed is: 1. A method of making a paper product having enhanced brightness improved color scheme and enhanced resistance to thermal yellowing comprising:i) providing bleached pulp;ii) forming an aqueous stock suspension comprising the bleached pulp;iii) draining the stock suspension
The invention claimed is: 1. A method of making a paper product having enhanced brightness improved color scheme and enhanced resistance to thermal yellowing comprising:i) providing bleached pulp;ii) forming an aqueous stock suspension comprising the bleached pulp;iii) draining the stock suspension to form a sheet;iv) drying the sheet, andv) treating the sheet with an oxidant composition comprising one or more oxidizing agents at about 0.0005 to about 2 weight percent on oven-dried pulp, one or more optical brighteners, and optionally one or more chelants, optionally one or more reducing agents, or combinations thereof, andwherein said oxidizing agents are selected from the group consisting of hydrogen peroxide, organic peroxyacids, inorganic peroxides, superoxides and peroxide-superoxides, organic and inorganic peroxyacids and salts thereof, peroxyhydrates, water-soluble organic peroxides, nitrosodisulfonates, hypochlorites, hypobromites, chlorites, chlorates, bromates, perehlorates, chlorine dioxide, chloroamines, chloroamides, chlorosulfamides, bromoamines, bromoarnides, bromosulfamides, chlorosulfonic acid, bromosulfonic acid and chlorine and wherein said bleached pulp material has a minimum ISO brightness of 84.4 and the oxidant composition excludes starch when the oxidant comprises hydrogen peroxide, organic peroxyacids, inorganic peroxides, superoxides and peroxide-superoxides, organic and inorganic peroxyacids and salts thereof, peroxyhydrates, and water-soluble organic peroxides.
이 특허를 인용한 특허 (8)
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St. John, Michael R.; Castro, David J.; Liu, Mei, Emulsification of alkenyl succinic anhydride with an amine-containing homopolymer of copolymer.
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St. John, Michael R.; Castro, David J.; Liu, Mei, Emulsification of alkenyl succinic anhydride with an amine-containing homopolymer or copolymer.
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St. John, Michael R; Castro, David J; Liu, Mei, Emulsification of alkenyl succinic anhydride with an amine-containing homopolymer or copolymer.
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Zhao, Yulin; Li, Jun; Rao, Qing Long; Ashton, Stephen; Cheng, Weiguo; Todorovic, Aleksandar; Smith, Alan, Method of improving dewatering efficiency, increasing sheet wet web strength, increasing sheet wet strength and enhancing filler retention in papermaking.
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Castro, David J.; Lowe, Robert M.; Liu, Mei, Method of increasing paper bulk strength by using a diallylamine acrylamide copolymer in a size press formulation containing starch.
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Benz, Bradley; Richardson, Paul F.; Thomas, James L.; Liu, Mei; Lowe, Robert M., Method of increasing paper strength.
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Castro, David J.; Lowe, Robert M.; Liu, Mei, Method of increasing paper strength using an amine containing polymer composition.
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Cheng, Weiguo; Liu, Mei; Furman, Jr., Gary S.; Lowe, Robert M., Wet end chemicals for dry end strength in paper.
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