- Author
-
Weisz, H. S.
|
Scheffler, B.
|
Neely, L. W.
- Title
- Method for Rendering Cellulosic Materials Flame Retardant.
- Coporate
- M. Lowenstein and Sons, Inc., New York, NY
- Report
-
U.S. Patent 3,644,140
April 17, 1970
6 p.
- Keywords
-
cellulosic materials
|
flame retardants
- Abstract
- The invention provides a teaching of method and apparatus for utilizing certain substituted phosphono-amide flame retardant containing compositions on cellulosic materials in a manner effective for mass production by continuous movement of the material. In particular, the invention utilizes apparatus which avoids sticking of the material to any conveying means during curing in the utilization of a festoon- or loop-curing-type oven. A critical material temperature range during curing has been found to be particularly effective in the process disclosed herein and the curing may be assisted by means of an auxiliary heater to render certain the maintenance of a predetermined temperature in the material itself as it passes through the oven.