With Organic Compound Containing Nitrogen Patents (Class 106/166.4)
The nitrogen is a member of a hetero ring (Class 106/166.41)
Oxygen and nitrogen in the same compound (e.g., ammonium alkyl sulfonate, tertiary amine oxide, triethanolamine, etc.) (Class 106/166.42)
  • Viscose spin bath additive of an amphoteric surfactant
    Patent number: 6379598
    Abstract: A method of reducing the clogging of nozzles and slits and diminishing the formation of deposits in a spin bath system in a process of making viscose filamentary and film materials by using, as a spin bath additive, an amphoteric surfactant having the formula I, and a spin bath system including an amphoteric surfactant having the formula I RNA (CnH2nNA)x−1A  (I) where R represents a hydrogen or an aliphatic group with 1-24 carbon atoms, each A represents a hydrogen, an aliphatic group with 1-24 carbon atoms, or BOOCCmH2m— groups, where m is a number from 1-3, B is hydrogen or a salt forming cation, n is a number from 2-3, x is 1-8, and the number of BOOCCmH2m— groups are from 1 to x+2, with the provision that the total number of carbon atoms in the aliphatic groups is from 8 to 45. The amphoteric surfactant has an excellent anticlogging effect, since it is a good dispersant and prevents or reduces precipitation in the spin bath.
    Type: Grant
    Filed: January 4, 2000
    Date of Patent: April 30, 2002
    Assignee: Akzo Nobel N.V.
    Inventors: Kent Bjur, Anders Cassel, Margreth Strandberg, Ingemar Uneback
  • Use of an alkoxylated polyamine surfactant as a viscose spin bath additive
    Patent number: 6316582
    Abstract: The present invention relates to a method of reducing the clogging of nozzles and slits and diminishing the formation of deposits in the spin bath system in the process of making viscose filamentary and film materials by using an alkoxylated polyamine surfactant having the formula: RNA&Parenopenst;CnH2nNA&Parenclosest;x−1A  (I) where R represents a hydrogen or an aliphatic group with 1-24 carbon atoms, each A represents a hydrogen, an aliphatic group with 1-24 carbon atoms, or H(OCmH2m)y-groups, where m is a number from 2-3, n is a number from 2-3, x is 4-8, with the proviso that the number of H(OCmH2m)y-groups are from 1 to x+1, and the total number of carbon atoms in the aliphatic groups is from 8 to 45. The alkoxylated polyamine surfactant has an excellent anticlogging effect, since it is a good dispersant and prevent or reduce precipitation in the spin bath. In addition it is very stable.
    Type: Grant
    Filed: June 1, 2000
    Date of Patent: November 13, 2001
    Assignee: Akzo Nobel N.V.
    Inventors: Kent Bjur, Anders Cassel, Margreth Strandberg, Ingemar Uneback
  • Method for producing cellulose particles
    Patent number: 6174358
    Abstract: A method for producing cellulose particles whereby a cellulose solution is dispersed in a regenerant or nonsolvent and the cellulose is regenerated or precipitated in dispersed form into cellulose particles.
    Type: Grant
    Filed: September 24, 1998
    Date of Patent: January 16, 2001
    Assignee: Cellcat GmbH
    Inventors: Jörg Oberkofler, Alexander Brandner, Jeffrey F. Spedding, Anton Schmalhofer