Stauffer Chemical Company

James River Ii, Inc.

Allyn J Ziegenhagen

Ramsey G Campbell

Attila Matray

Gene H Yeh

The barrier properties of crystalline polyolefin film can be improved substantially by incorporating a precise amount of a partially incompatible wax into the polyolefin. When the polyolefin is polypropylene or polybutylene, the wax is preferably a paraffin wax. The precise amount of wax, which produces optimum improvement in barrier properties, lies in the range of about 3 to 10 percent based on the weight of the polyolefin. The range in which excellent results are obtained can be broadened by contacting the film with a cooling medium immediately after it is extruded. The film may be annealed to further improve the barrier properties.

Polyolefin films having improved barrier properties

An improvement in a process for recovering residual amounts of ethylene in ethylene chlorination effluents is disclosed, whereby ureacted chlorine is virtually eliminated. Elimination of the chlorine is accomplished by reacting it with the clorinated hydrocarbons in the stream over a novel ferric chloride catalyst mixture.

Growing community of inventors

Berkeley, CA, United States of America

Allyn J Ziegenhagen