Chemische Werke Huls Aktiengesellschaft

Chemische Werke Huels Aktiengesellschaft

Huels Aktiengesellschaft

Chemische Werke Huels, Aktiengellschaft

Konrad Rombusch

Gunther Maahs

Hanns-Jorg Bax

Armin Gude

Wolfgang Zaar

Wolfgang Schafer

Alfred Konietzny

Hans-Dieter Zagefka

Gerhard Menzel

Johanna M Hegenberg, Heir

Peter Hegenberg, Deceased

Joachim Hegenberg, Heir

Sigrid Rossnagel, Heir

Helmut Birkner

Heidelore Freyberger, Heir

Dagmar Hegenberg, Heir

Hans-Ernst Sprenger

Felicitas Zottl, Heir

A process for producing squaric acid comprises reacting hexachlorocyclobutene, or its mixtures with hexachlorobutadiene, with 96-100% sulfuric acid, at 80.degree.-150.degree. C., and adding at least the stoichiometric amount of water required for the hydrolysis, while maintaining the acid concentration between 96% and 100% throughout the reaction.

Process for producing squaric acid

Quadratic acid bisamides and salts thereof having the formula I are effective stabilizers of synthetic resins, especially for imparting resistance to deterioration resulting from exposure to light ##STR1## wherein R.sub.1 is H, C.sub.1-12 alkyl or OH-substituted C.sub.2-12 alkyl; R.sub.2 is --(CH.sub.2).sub.m --O--.sub.n, wherein m is an integer of 2-6; n is 0 or 1;

Quadratic acid amide derivatives, their use as stabilizers, and

Amino-group bearing, low molecular weight 1,3-butadiene polymers used as stabilizers for molded or unshaped plastics in amounts of 0.01 to 2.0 weight percent referred to the plastic, where the amino-group bearing component is derived from a substituted piperidine having the general formula: ##STR1## where R represents similar or different alkyl groups having 1 to 3 carbon atoms.

Amino-group bearing, low molecular weight 1,3-butadiene polymer for

A process for preparing a pentachloro-3-butenoic acid alkyl ester comprises reacting the corresponding 1-alkoxyheptachloro-3-butene with an aqueous solution of an alkali metal carbonate. In a preferred embodiment, the starting material 1-alkoxyheptachloro-3-butene is the solution obtained as the reaction product of the reaction of the corresponding 1-alkoxypentachloro-1,3-butadiene with chlorine.

Process for the preparation of pentachloro-3-butenoic acid esters

A process for preparing tetrachlorocyclobutenone from hexachlorocyclobutene comprises reacting (a) hexachlorocyclobutene with

Process for the manufacture of tetrachlorocyclobutenone from

A process for preparing a 2,3,4,4-tetrachloro-3-butenoic acid ester comprises reacting tetrachlorocyclobutenone in the presence of hexachloro-1,3-butadiene with an alcohol at a temperature of 125.degree.-200.degree. C.

Process for the manufacture of 2,3,4,4-tetrachloro-3-butenoic acid esters

Ethylene and at least one other 1-monoolefin monomer, alone or in admixture with a non-conjugated hydrocarbon diene monomer, are copolymerized in the presence of organic chlorine compound-activated Ziegler-Natta catalyst, wherein the organic chlorine compound is a hydrocarbon or a halohydrocarbon ester of up to 15 carbon atoms of 2,3,4,4-tetrachloro-3-butenoic acid.

Copolymerization of ethylene employing an organic chlorine

Pentachlorovinylacetyl chloride is prepared by chlorinating tetrachlorocyclobutenone with a chlorinating agent such as (a) Cl.sub.2, optionally in the presence of additives, e.g., phosphorous pentachloride, antimony pentachloride, or oxides, hydroxides or carbonates of metals such as alkali or alkaline earth metals; or (b) phosphorous pentachloride.

Process for the manufacture of pentachlorovinylacetyl chloride

Shaped or unshaped synthetic resins having about 0.01-5% by weight of stabilizers where the stabilizers are bisamides of quadratic acids having the general formulas I and/or II as follows: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4, are identical or different, and represent

Growing community of inventors

Marl, Germany

Konrad Rombusch