Polymer supported Ziegler-Natta catalysts

US4632912A · kind A · utility

Assignee

• THE DOW CHEMICAL COMPANY · US

Inventors

• Stephen A. Bedell · Lake Jackson, US
• William R. Howell, Jr. · Midland, US
• William Monroe Coleman, III · Lake Jackson, US

Key dates

• Filing date: Dec 10, 1985
• Grant date: Dec 30, 1986
• Expiry date: Dec 10, 2005

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F10/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Ziegler-Natta catalysts which are polymer supported compounds or complexes of elements of the d-block transition metals, lanthanide or actinide series are disclosed. An example of the polymer support is chloromethylated polystyrene-divinyl benzene copolymer covalently bonded to catechol. An example of the compound or complex of an element of the transition metal, lanthanide or actinide series is that which results when catechol which is covalently bonded to the polymer is contacted with titanium tetraisopropoxide. These catalysts are useful in preparing polymers with reduced halide content which reduces corrosion in polymer processing equipment.