Basf Aktiengesellschaft

Franz Neumayr

Martin Decker

Karl Merkel

Erhard Seiler

Gerhard Fahrbach

Kurt Schneider

Guenther Daumiller

Joachim Datow

Heinrich Scholz

Chlorocarboxylic acid chlorides of the formula ##STR1## where R is H or alkyl and n is an integer from 2 to 4, are prepared by reacting a lactone of the formula ##STR2## with phosgene at elevated temperatures and in the presence of a quaternary ammonium salt.

Preparation of chlorocarboxylic acid chlorides

The manufacture of .beta.-chlorocarboxylic acid chlorides by reacting .alpha..beta.-olefinically unsaturated carboxylic acids with phosgene is advantageously carried out by first at least partially reacting the unsaturated carboxylic acid with hydrogen chloride and then carrying out the reaction with phosgene.

Manufacture of .beta.-chlorocarboxylic acid chlorides

A new compound, 1,3,5-tris-(2-chloroformyl-oxyethyl)-isocyanurate.

1,3,5 Tris-(2-chloroformyl-oxyethyl)-isocyanurate

Process for the removal of phosgene from an off-gas in which it is present in small quantities, by washing with an aqueous solution of alkali and ammonia.

Removal of phosgene from off-gases

Modified copolymers of vinyl aromatic compounds or diene hydrocarbons with diisopropenylbenzene. They contain at least 0.2% of polymerized units of a group of the general formula The copolymers are intermediates in the manufacture of block copolymers and graft copolymers suitable for use as impact-resistant plastics or polymeric antistatic agents.

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Weisenheim, Germany

Franz Neumayr