Treatment of (Co)polymers to remove residual monomers

US4503219A · kind A · utility

Assignee

• BASF SE

Inventors

• Rudi W. Reffert · Beindersheim, DE
• Juergen Hambrecht · Heidelberg, DE
• Rudolf H. Jung · Worms, DE
• Adolf Echte · Ludwigshafen, DE

Key dates

• Filing date: Apr 28, 1983
• Grant date: Mar 5, 1985
• Expiry date: Apr 28, 2003

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F6/006
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

(Co)polymers which are composed of one or more monomers from the group comprising PA0 (a) the vinyl-aromatic monomers and PA0 (b) the ethylenically unsaturated monomers and furthermore contain one or more monomer components (a) or (b), or (a) and (b), as unreacted residual monomers are treated at above the glass temperature of the (co)polymer and in the presence of one or more assistants, which have been added to the (co)polymer. The assistant used is a bicyclic compound of the general formula I ##STR1## where X is a methylene, ethylene, 1,1-ethenyl, 1,2-ethenyl, carbonyl, azo, amino, ether or thioether group which is unsubstituted or substituted by halogen, alkyl, alkenyl, cycloalkyl, aryl, carboxyl, carboxyalkyl, an ether group or a thioether group, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each hydrogen, halogen, alkyl, alkenyl, cycloalkyl, aryl, carboxyalkyl or nitrile, R.sup.5 and R.sup.6 are each hydrogen, halogen, alkyl or carboxyalkyl, and R.sup.7 and R.sup.8 are each hydrogen, halogen, alkyl, alkenyl, aryl, carboxyalkyl, carboxyl or nitrile.