UV-active regenerated cellulose fiber
AssigneeHoechst Aktiengesellschaft
InventorsAndreas Schrell, Stefan Meier
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Abstract
UV-active regenerated cellulose fiber Luminescent regenerated cellulose fiber comprising one or more inorganic luminophors selected from the group consisting of the phosphates, tungstates, oxides, silicates and aluminates of the alkaline earth metals, of the subgroup elements or of the rare earths and the halides of the alkali and alkaline earth metals doped with one or more activators selected from the group consisting of Mn.sup.2+, Mn.sup.4+, Sb.sup.3+, Sn.sup.2+, Pb.sup.2+, Cu.sup.+, Ag.sup.+ and the rare earths.
Claims10
Luminescent regenerated cellulose fiber comprising one or more inorganic luminophors selected from the group consisting of the phosphates, tungstates, oxides, silicates and aluminates of the alkaline earth metals, of the subgroup elements or of the rare earths and the halides of the alkali and alkaline earth metals doped with one or more activators selected from the group consisting of Mn.sup.2+, Mn.sup.4+, Sb.sup.2+, Pb.sup.2+, Cu.sup.+, Ag.sup.+ and the rare earths, and wherein the inorganic luminophors have an average particle size of less than 1 .mu.m.
Luminescent regenerated cellulose fiber containing 0.01 to 5% by weight, based on the cellulose content of the spinning dope prior to coagulation and shaping, one or more inorganic luminophor-activator combinations selected from the group consisting of barium magnesium aluminate or strontium aluminate, each doped with Eu.sup.2+ ;
- yttrium oxide doped with Eu.sup.3+ ;
- calcium halophosphate or zinc silicate, each doped with Mn.sup.2+ or Sb.sup.3+ ;
- strontium magnesium orthophosphate doped with Sn.sup.2+ ;
- and cerium magnesium aluminate doped with Tb.sup.3+ ;
- and wherein the inorganic luminophors have an average particle size of less than 1 .mu.m.
Dependencies are inferred from the claim text.