Sulfonation of regenerated cellulose with sulfonated polymers and use of the thus modified fibres
AssigneeDyStar Textilfarben GmbH & Co. Deutschland KG
InventorsAndreas Schrell, Bernd Huber
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Abstract
Sulfonated regenerated cellulose fiber obtained by adding a modifier to a viscose dope or alkali cellulose or cellulose solution and spinning fiber therefrom, wherefor the modifier is a starch etherified with C.sub.2 -C.sub.5 -alkylsulfonic acid radicals and having a degree of substitution of 0.1 to 3, a starch admixed with vinylsulfonic acid or a styrenesulfonic acid, or a polymeric styrenesulfonic acid or polymeric vinylsulfonic acid.
Claims20
Sulfonated regenerated cellulose fiber obtained by adding a modifier to a viscose dope or alkali cellulose or cellulose solution and spinning fiber therefrom, wherefor the modifier is (a) a starch etherified with C.sub.2 -C.sub.5 -alkylsulfonic acid radicals and having a degree of substitution of 0.1 to 3,
- (b) a starch admixed with vinylsulfonic acid,
- (c) a starch admixed with styrene-sulfonic acid, or
- (d) polymeric vinylsulfonic acid,
- and wherein the ether group of the etherified starch has the formula --O--(CH.sub.2).sub.x --SO.sub.3 M or --O--CH.sub.2 --CHOH--CH.sub.2 --SO.sub.3 M, where M is hydrogen, an alkali metal or an alkaline earth metal and x is 2 or 3.
Sulfonated regenerated cellulose fiber which has been obtained by the process comprising:
- adding to viscose dope or to an alkali cellulose or cellulose solution at least one of the following modifiers, in a concentration of 1 to 20% by weight:
- a starch etherified with at least one C.sub.2 -C.sub.5 -alkylsulfonic acid radical and having a degree of substitution of 0.1 to 3 and said etherified starch has a degree of polymerization ranging from 200 to 1000 anhydroglucose units, a starch admixed with vinyl sulfonic acid or a styrene-sulfonic acid, or a polymeric styrenesulfonic acid or polymeric vinylsulfonic acid, and
- spinning fiber from the resulting modified viscose dope or alkali cellulose or cellulose solution.
A starch etherified with one or more C.sub.2 -C.sub.5 -alkyl-sulfonate radicals and having a degree of substitution between 0.1 and 3, and said etherified starch has a degree of polymerization ranging from 200 to 1000 anhydroglucose units.
Sulfonated regenerated cellulose fiber obtained by adding a modifier to a viscose dope or alkali cellulose or cellulose solution and spinning fiber therefrom, wherefor the modifier is
- (a) a starch etherified with C.sub.2 -C.sub.5 -alkylsulfonic acid radicals and having a degree of substitution of 0.1 to 3,
- (b) a starch admixed with vinylsulfonic acid or
- (c) a starch admixed with styrene-sulfonic acid,
- and wherein the ether group of the etherified starch has the formula --O--(CH.sub.2).sub.x --SO.sub.3 M or --O--CH.sub.2 --CHOH--CH.sub.2 --SO.sub.3 M, where M is hydrogen, an alkali metal or an alkaline earth metal and x is 2 or 3.
Dependencies are inferred from the claim text.