|
Modified ligninsulfonates as dispersing agents for benzoltriazole ultra-violet absorbing agents
U.S. Patent Number: 5360559
Abstract: Stable dispersions of benzotriazole U.V. absorbing agents utilizing modified ligninsulfonates as the dispersing agent. The modified ligninsulfonates are formaldehyde condensates of ligninsulfonate. The disclosed dispersions have improved stability at elevated temperatures and improved application characteristics.
Inventors: Cooke; Thomas W. (Greensboro, NC)
Assignee: Ciba-Geigy Corporation (Ardsley, NY)
Application Number: 08/168,743
Issued: 1994-11-01
Expired: 2006-11-01
Classes: 252/8.61 ; 524/91; 8/118; 8/648
Field of search: 252/8.7 524/91 8/118,648
|
