Patents Assigned to Ciba Specialty Chemcials Corp.
  • Aqueous dispersions for antioxidants
    Patent number: 7205350
    Abstract: The present invention relates to aqueous dispersions for solid phenolic antioxidants, wherein the antioxidants are dispersed in the aqueous phase with polyvinyl alcohol as dispersing agent. The invention also relates to a process, which comprises stabilising a polymer material against oxidative, thermal or light-induced degradation by adding to the polymer the aqueous dispersion.
    Type: Grant
    Filed: March 13, 2003
    Date of Patent: April 17, 2007
    Assignee: Ciba Specialty Chemcials Corp.
    Inventor: Daniel Thibaut
  • Difunctional photoinitiators
    Patent number: 7084183
    Abstract: The invention relates to ?-hydroxy ketones of formula I or IIa; or mixtures of compounds of formula I and II; or mixtures of compounds of formulae Ia and IIa
    Type: Grant
    Filed: October 31, 2002
    Date of Patent: August 1, 2006
    Assignee: Ciba Specialty Chemcials Corp.
    Inventors: André Fuchs, Rinaldo Hüsler, Christian Schregenberger, Martin Kunz