Patent RU-2223985-C2 (RU)
Inventor: SELTZER RAYMOND
IPC: C07D405/12
Filed: 1998-07-14
Granted: 2004-02-20
Abstract: FIELD: polymer materials. SUBSTANCE: invention relates to preventing loss of whiteness (brightness) and increase or resistance against yellowing in cellulose and paper. Cellulose or paper still containing lignin includes 0.001 to 5% of sterically hindered amine selected from compounds having formulas A*, D*, X*, Y*, Z*, AA*. BB*. CC*, and DD*:   or IIId, IIIe, IV, V, VI, VII, and VIII:  , in which R is hydrogen atom; in formula A* n=1,   is hydrogen or C1-C4-alkyl; in D* y= 1,   is hydrogen or methyl,   is C1-C4-alkyl, X is phosphate, phosphonate, carbonate, bicarbonate, nitrate, chloride, bromide, bisulfite, sulfite, bisulfate, sulfate, borate, formate, acetate, benzoate, citrate, oxalate, tartrate, acrylate, polyacrylate, fumarate, maleate, itaconate, glycolate, malate, mandelate, tiglate, ascorbate, polymethacrylate, nitrilotriacetate, hydroxyethylenediaminottriacetate, ethylenediaminetetraacetate, diethylenetriaminopentamethylenephosphonate, alanesulfonate, or arenesulfonate, and total charge of cations h equals total charge of anions j; in formulas X*-DD*, IV-VIII n= 2 or 3,   is hydrogen, methyl, ethyl, butyl, or benzyl, m=1-4, x=1-4; when x=1,   and   each independently is C1-C18-alkyl, alkyl interrupted with 1-5 oxygen atoms, alkyl substituted by 1-5 hydroxyl groups, or alkyl simultaneously interrupted with indicated oxygen atoms and substituted by indicated hydroxyl groups, C5-C12-cycloalkyl, C7-C15-arylalkyl, C6-C10-aryl, or aryl substituted by 1-3 C1-C8-alkyl groups, or   is hydrogen, or   and   together form tetrametylene, pentamethylene, hexamethylene, or 3- oxapentamethylene; when x=2,   is hydrogen or C1-C8-alkyl, alkyl interrupted with 1or 2 oxygen atoms, alkyl substituted by hydroxyl group, or alkyl simultaneously interrupted with indicated oxygen atoms and substituted by hydroxyl group;   is C2-C18-alkylene, alkyl interrupted with 1-5 oxygen atoms, alkylene substituted by 1-5 hydroxyl groups, or alkyl simultaneously interrupted with indicated oxygen atoms and substituted by indicated hydroxyl groups; o-, m-, or p-phenylene optionally substituted by 1 or 2 C1- C4-alkyl groups or   is group   wherein k=2 and h=1-40, or   and R 1  together with nitrogen atom, to which they are connected, is piperazine-1,4-diyl; when x=3, R 10  is hydrogen, R 12  is C4-C8-alkylene interrupted with one nitrogen atom; when x=4, G 1  is hydrogen, R 1  is C6-C12-alkylene interrupted with two nitrogen atoms, R 2  is hydrogen, C1-C8-alkyl, alkyl interrupted with 1 or 2 oxygen atoms, alkyl substituted by hydroxyl group, or alkyl simultaneously interrupted with indicated oxygen atoms and substituted by hydroxyl group, p=2 or 3, and Q is alkali metal salt, ammonium, or R 1 ; in formula DD* m=2 or 3; when m=2, G is group R 1  wherein r= 0-3 and R is hydrogen or methyl; and when m=3, G is glycerol; on condition that in formula A*, when R 2  is hydrogen, X cannot be chloride or bisulfate; and when in formula D*, when R 1  is hydrogen and R 2  methyl, X cannot be chloride or bisulfate; in formulas IIId and IIIe R 2/   is (CH 2 ) K O[(CH 2 ) K O] h (CH 2 ) K  or R 1 , R 2  is C2-C6-alkyl interrupted with 1 or 2 oxygen atoms and/orsubstituted by 2 or 3 hydroxyl groups, or R 1  is C1-C4-alkyl substituted by carboxyl group or, or R 2  is alkyl substituted by group R 1 , wherein R 2  is methyl or ethyl, and R 3  is C3-C5-alkyl interrupted with group -COO- or -CO-, or N + (G 1 ) 4 , is group (CH 2 CHR-O) r CH 2 CHR-, wherein a=1-4, or R 1  is group R 10 , wherein R 12  is C1-C4-alkyl, B 11  is hydrogen or C1-C4-alkyl, and OE 9  is group NE 11 E 12 , wherein E 9  is C1-C4-alkyl interrupted with 1 or 2 oxygen atoms, or E 9  is group E 9 , wherein COOE 10  is C1-C4-alkyl, on condition that E 10  cannot be 2,3-dihydroxypropyl. In formulas IV-VIII, X is inorganic or organic anion. In formulas IIId and IIIe, E 8  is group E 8  or CH 2 (OCH 2 CH 2 ) a OCH 3 , E 8  is C2-C6-alkyl interrupted with 1 or 2 oxygen atoms and/or substituted 2 or 3 hydroxyl groups, or NHE 7  is C1-C4- alkyl substituted by carboxyl group or alkali metal, ammonium, or lower alkylammonium carboxylate group, or E 7  is alkyl substituted by group E 11 , wherein E 12  is methyl or ethyl, and CO-E 13  is C3-C5-alkyl interrupted with group - COO- or -CO-, or E 13  is group E 13 , wherein a=1-4, or -NHE 14  is group E 14 , wherein E 9  is C1-C4-alkyl; B 11  is hydrogen or C1-C4-alkyl; and OE 9/   is group-CO-NE 11 E 12 , wherein E 9  is C1-C4-alkyl interrupted with 1 or 2 oxygen atoms; or E 9  is group E 9 , wherein -COOE 10 , is C1-C4-alkyl; on condition that E 10  cannot be 2,3-dihydroxypropyl and in formulas IV-VIII X is inorganic or organic anion. Cellulose and paper can contain effective amount of additive selected from group comprising UV emission absorbers, polymer inhibitors, fluorescent bleachers, metallic chelating agents, and their mixtures. EFFECT: prevented degree of whiteness and enhanced resistance against yellowing of cellulose and paper still containing lignin. 7 cl, 55 tbl, 104 ex E 9  E 8  -CH 2 (OCH 2 CH 2 ) a OCH 3 , E 8  -NHE 7  E 7  E 11  E 12  E 13  E 13  E 13  -NHE 14  E 14  E 9