Patents by Inventor Christof Kandzia

Christof Kandzia has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Photoinitiator mixtures containing acylphosphinoxides and benzophenone derivatives
    Patent number: 6207727
    Abstract: A photoinitiator mixture comprising a) at least one acyl- or diacylphosphine oxide of the formula I and b) at least one benzophenone derivative of the formula
    Type: Grant
    Filed: December 30, 1998
    Date of Patent: March 27, 2001
    Assignee: BASF Aktiengesellschaft
    Inventors: Erich Beck, Christof Kandzia, Bernhard Prantl, Matthias Lokai, Peter Enenkel, Edmund Keil, Klaus Menzel
  • Photoinitiator blends
    Patent number: 6103453
    Abstract: A photoinitiator blend, containinga) at least one monoacylphosphine oxide of formula I ##STR1## in which R.sup.1 denotes C.sub.1 -C.sub.18 alkyl; C.sub.1 -C.sub.4 alkyl, C.sub.5 -C.sub.8 cycloalkyl, C.sub.7 -C.sub.9 phenylalkyl, phenyl, naphthyl, biphenyl, all substituted by halogen or C.sub.1 -C.sub.6 alkoxy; phenyl, naphthyl or biphenylyl, all mono- or poly-substituted by halogen, C.sub.1 -C.sub.12 alkyl and/or C.sub.1 -C.sub.12 alkoxy; or a monovalent N--, O--, or S--containing 5-membered or 6-membered heterocyclic radical,R.sup.2 denotes phenyl, naphthyl, biphenylyl; phenyl, naphthyl or biphenylyl, all mono- or poly-substituted by halogen, C.sub.1 -C.sub.12 alkyl and/or C.sub.1 -C.sub.12 alkoxy; a monovalent N--, O--, or S--containing 5-membered or 6-membered heterocyclic radical, C.sub.1 -C.sub.18 alkoxy, phenoxy; phenoxy substituted by halogen, C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 alkoxy; benzyloxy, cyclohexyloxy or R.sup.2 and R.sup.1 form a ring together with the phosphorus atom,R.sup.
    Type: Grant
    Filed: March 17, 1999
    Date of Patent: August 15, 2000
    Assignee: BASF Aktiengesellschaft
    Inventors: Bernhard Prantl, Erich Beck, Matthias Lokai, Christof Kandzia
  • Cinnamylidene camphor derivatives and their use as UV-A protecting agents
    Patent number: 6086857
    Abstract: The invention relates to cinnamylidenecamphor derivatives of the formula (1) ##STR1## where the diene system is in the Z,Z, Z,E, E,Z or E,E configuration and R.sup.1 is H, CH.sub.3,R.sup.2 is C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.6 -alkoxy, halogen, NR.sup.3 H, NR.sup.3.sub.2,R.sup.3 is C.sub.1 -C.sub.4 -alkyl,R.sup.4 is H, C.sub.1 -C.sub.6 -alkyl,n is 1, 2,and to its use.
    Type: Grant
    Filed: September 3, 1998
    Date of Patent: July 11, 2000
    Assignee: BASF Aktiengesellschaft
    Inventors: Christof Kandzia, Horst Westenfelder, Volker Schehlmann