Dynamit Nobel Aktiengesellschaft

Georg Blumenfeld

Norbert Vollkommer

Hermann Richtzenhain

Wilhelm Vogt

Egon N Petersen

Paul Riegger

Norbert Volkommer

An improvement in a process for preparing a xylene chlorinated in the nucleus by contacting the xylene with chlorine in the presence of a catalyst, the improvement residing in employing as the catalyst an iron halide or antimony halide and employing a co-catalyst which is an aliphatic, halogenated or nonhalogenated hydrocarbon having an oxygen function.

Method of preparing xylenes chlorinated in the nucleus

Halogen-containing bis-acrylates and bis-methacrylates corresponding to the formula ##STR1## in which R represents hydrogen or a methyl group and X represents chlorine and/or bromine, are provided as well as a process for producing such compounds. The compounds are useful for the formation of polymers and copolymers and as a cross-linking agents. Also included in the invention are the polymers and copolymers based on the above-described halogen-containing bis-acrylates and bis-methacrylates, methods for the production of said polymers and the use of said polymers as flame proofing agents, etc.

Halogen-containing unsaturated bis-esters

Tetrahaloxylene diesters of formulas 1 and 2: ##STR1## wherein R= hydrogen or a methyl group, and each X is bromo, with the proviso that some of the X's can be chloro. The compounds are useful as flame retardants for plastics.

Tetrabromoxylylene diacrylates and substituted acrylates

An improvement in an unsaturated polyesters having recurring units of the formula ##STR1## wherein A is the residue of an alcoholic moiety and B is the residue of an acid moiety, which improvement resides in the fact that some of the A residues are chloroxylylene containing residues having the formula ##STR2##

Solution of an unsaturated polyester and a copolymerizable monomer

Unsaturated polyesters derived from chloroxylylene diols

Compounds of the formula: ##STR1## WHEREIN: EACH X is chloro or bromo

Tetrahalogen xylylene diacrylates, tetrahalogen xylyl acrylates,

A process for preparing a chloromethyl-tetrachlorobenzene which comprises the steps of:

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St. Augustin, Germany

Georg Blumenfeld