Organic compounds -- part of the class 532-570 series – Organic compounds – Nitrogen attached directly or indirectly to the purine ring...
Patent
1994-04-29
1996-09-17
Haley, Jacqueline
Organic compounds -- part of the class 532-570 series
Organic compounds
Nitrogen attached directly or indirectly to the purine ring...
544314, 548520, 548542, C07D40304
Patent
active
055569765
ABSTRACT:
A method of forming a crosslinked cellulose product is disclosed wherein cellulose fibers are exposed to a solution that includes a catalyst and a crosslinking agent selected from the group consisting of a cyclic N-sulfatoimide or cyclic N-phosphatoimide; a dimethoxyethanal; a mixture of glyoxal and imidazolidone; a diethanol; or a periodate. Specific examples of the crosslinking agents of the present invention include pyridinium N-sulfatosuccinimide; 2,2'-sulfonyldiethanol; sodium periodate; a mixture of dimethoxyethanal and urea; and a mixture of glyoxal and 2-imidazolidone. An acid or base catalyst, as appropriate, may be used with the crosslinking agent to increase the crosslinking reaction rate. In especially preferred embodiments, cellulose fibers are exposed to the crosslinking agent and catalyst, then separated into individualized fibers in a fiberizer. The individualized fibers are then dried and cured at an elevated temperature such that intrafiber cellulose crosslinking bonds are formed to the substantial exclusion of interfiber bonds. The resulting cellulose fibers have high absorbency, bulk, and wet and dry resiliency that makes them suitable for use in such cellulose products as paper towels, diapers, and sanitary products.
REFERENCES:
patent: 3208676 (1965-09-01), Jensen
patent: 3224926 (1965-12-01), Bernardin
patent: 3395708 (1968-08-01), Hervey et al.
patent: 3440135 (1969-04-01), Chung
patent: 3482788 (1969-12-01), Newell
patent: 3519211 (1970-07-01), Sakulich et al.
patent: 3554862 (1971-01-01), Hervey et al.
patent: 3637146 (1972-01-01), Banks
patent: 3658613 (1972-04-01), Steiger
patent: 3677886 (1972-07-01), Forssblad et al.
patent: 3750962 (1973-08-01), Morgan, Jr.
patent: 3765971 (1973-10-01), Fleissner
patent: 3819470 (1974-06-01), Shaw et al.
patent: 3825194 (1974-07-01), Buell
patent: 3901236 (1975-08-01), Assarsson et al.
patent: 3950218 (1976-04-01), Levesque
patent: 3950219 (1976-04-01), Levesque
patent: 3966126 (1976-06-01), Werner
patent: 3987968 (1976-10-01), Moore et al.
patent: 4144122 (1979-03-01), Emanuelsson et al.
patent: 4241881 (1980-12-01), Laumer
patent: 4252279 (1981-02-01), Johansson et al.
patent: 4303471 (1981-12-01), Laursen
patent: 4332586 (1982-06-01), North
patent: 4351699 (1982-09-01), Osborn, III
patent: 4406415 (1983-09-01), Greer
patent: 4476323 (1984-10-01), Hellsten et al.
patent: 4533507 (1985-08-01), Tao
patent: 4572440 (1986-02-01), Tao
patent: 4600462 (1986-07-01), Watt
patent: 4650127 (1987-03-01), Radwanski et al.
patent: 4729516 (1988-03-01), Williams, Jr.
patent: 4822453 (1989-04-01), Dean et al.
patent: 4853086 (1989-08-01), Graef
patent: 4889595 (1989-12-01), Herron et al.
patent: 4913773 (1990-04-01), Knudsen et al.
patent: 4935022 (1990-06-01), Lash et al.
patent: 5217445 (1993-06-01), Young et al.
American Society of Agricultural Engineers, ASAE publication 10-81, Forest Regeneration, 1080117, (Mar. 1981). pp. 108-117.
VanVerst et al., Amine-Induced Lossen Rearrangments of 3-Hydroxy-5, 6-dihrodouracil and N-Hydroxysuccinimide Benzenesulfonates, Journal of Heterocyclic Chemistry, vol. 16 (1979) p. 1329.
HBA, Weyerhaeuser Paper Company, 1990.
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