Degradable plastic composition

US4073764A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Heinz-Peter Hemmerich
• Gerhard Winter · Dossenheim, DE
• Hans J. Rosenkranz · Krefeld, DE
• Peter Woditsch · Krefeld, DE

Key dates

• Filing date: Jul 18, 1975
• Grant date: Feb 14, 1978
• Expiry date: Jul 18, 1995

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S260/43
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A plastic composition degradable under the influence of weather or light, comprising a plastic material and finely divided titanium dioxide with a specific surface of more than about 20 m.sup.2 /g. Preferably the titanium dioxide is obtained by hydrolyzing titanium sulfate in aqueous solution, has a predominantly anatase structure, a lightening power of less than about 400, a specific surface of about 60 to 400 m.sup.2 /g and is present in about 0.5 to 5% by weight of the composition, and the plastic material is selected from the group consisting of polyethylene, ethylene-vinyl acetate copolymer, polystyrene, polyvinyl chloride, polyamides and ABS-polymers.