Organic compounds -- part of the class 532-570 series – Organic compounds – Carbohydrates or derivatives
Patent
1988-12-09
1991-06-25
Griffin, Ronald W.
Organic compounds -- part of the class 532-570 series
Organic compounds
Carbohydrates or derivatives
536 187, 536 30, 536 31, 536 32, 536115, 536117, 536118, 536 58, C08B 3708, C08B 500, C08B 1505, C08B 1506
Patent
active
050268341
ABSTRACT:
A modified cellulose has a structure represented by the formula ##STR1## Cell is the framework of the unmodified cellulose molecule or of the chitin molecule, in each case without hydroxyl groups. Z is a nitrogen or sulfur atom. In the case where Z is a nitrogen atom, T and Z together are an acylamide or urea group and Q is (X'-Y') and/or together with the O an ester group and/or together with the O a carbamate group. In the case where Z is a sulfur atom, T is omitted and Q together with the O is an ester group and/or together with the O a carbamate group and, as desired, (X'--Y'). The relationships 0<n<m and 0.ltoreq.s<m are obeyed and (n+s) indicates the mean degree of substitution. m=3 in the case of the unmodified cellulose molecule and m=2 in the case of the chitin molecule. As desired, --X-- can be omitted or --X-- and --X'-- denote specific divalent groups and --Y and --Y' denote --H and/or specified univalent radicals and X is identical to or different from X' and Y is identical to or different from Y' .
REFERENCES:
patent: 3702754 (1972-11-01), Vigo et al.
patent: 4278790 (1981-07-01), McCormick
patent: 4872983 (1989-10-01), Diamantoglou et al.
Chenoweth, "Biocompatibility of Hemodialysis Membranes", ASAIO Journal, Apr./Jun. 1984, vol. 7, pp. 44-49.
Chenoweth et al., "Anaphylatoxin Formation During Hemodialysis: Effects of Different Dialyzer Membranes", Kidney International, vol. 24 (1983), pp. 764-769.
Clingman et al., "The Alkane Dithioether and the Polysulfide Crosslinking of Cellulose", Journal of Polymer Science: Part C, No. 11, (1965), pp. 107-118.
Heuser et al., "The Rate of Esterification of Primary and Secondary Hydroxyls of Cellulose with p-Toluenesulfonyl (Tosyl) Chloride", Journal of Am. Chem. Soc., vol. 72, Feb. 1950, pp. 670-674.
Ott et al., "Cellulose and Cellulose Derivatives", Part II, p. 822.
Entwurf DIN 54 270 Blatt 2, Aug. 1974, pp. 1-4.
Diamantoglou Michael
Kuhne Helmut
Akzo N.V.
Griffin Ronald W.
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