Hoechst Aktiengesellschaft

Werner Sommer

Volker Knittel

Horst-Dieter Thamm

Gerhard Weckler

Wolfram Busch

Udo Becker

Franz Scheidl

Johannes Brandrup

Johann P Fischer

Horst Semmler

Novel phosphonocarboxylic acid compounds having the formula ##STR1## wherein the radicals R which may be identical or different and which represent alkyl radicals with 1-18 carbon atoms which may be optionally substituted by halogen, hydrogen, alkali metal ions or ammonium ions, are prepared by reacting methylene phosphonic acid alkyl esters with acrylic acid esters in the presence of strongly basic catalysts at temperatures of about 0.degree.-140.degree. C., and by possibly transesterifying the reaction products or by submitting the latter to acid or basic hydrolysis. The acid hydrolysis to yield the free, 3,3-diphosphono-pimelic acid is best carried out with at least the about 6-fold molar quantity of a carboxylic acid such as HCOOH, CH.sub.3 COOH, etc., optionally in the presence of catalytic quantities of strong acids or bases, at elevated temperatures. The compounds of formula (I), wherein the radicals R represent only alkyl radicals which may possibly be substituted by halogen, are valuable plasticizers for polyvinyl chloride, the compounds of formula (I), wherein R=H, alkali metal ions and/or ammonium ions, are valuable gypsum setting retardants and complex-forming agents for metal ions.

Diphosphonodicarboxylic acid esters

Medical apparatus for parenteral liquids wherein at least the surfaces coming into contact with said liquids consist of or contain a chlorinated polyolefin as specified and additionally contain a glycerol ester of an aliphatic fatty acid. The apparatus is characterized by a very good blood tolerance.

Medical apparatus for parenteral liquids

Free-flowing chloropolyethylene in powder form which keeps this property after prolonged storage and has good processing properties is impregnated substantially on the particle surface with definite amounts of fine-grained vinyl chloride polymer and fine-grained organic substance in a definite proportion. The invention also relates to a process for the manufacture of such an improved chloropolyethylene and the use thereof.

Free flowing chloropolyethylene, its manufacture and use

Novel phosphonocarboxylic acid compounds having the formula ##STR1## wherein the radicals R which may be identical or different and which represent alkyl radicals with 1-18 carbon atoms which may be optionally substituted by halogen, hydrogen, alkali metal ions or ammonium ions, are prepared by reacting methylene phosphonic acid alkyl esters with acrylic acid esters in the presence of strongly basic catalysts at temperatures of about 0.degree.-140.degree. C., and by possibly trans-esterifying the reaction products or by submitting the latter to acid or basic hydrolysis. The acid hydrolysis to yield the free 3,3-diphosphono-pimelic acid is best carried out with at least the about 6-fold molar quantity of a carboxylic acid such as HCOOH, CH.sub.3 COOH, etc., optionally in the presence of catalytic quantities of strong acids or bases, at elevated temperatures. The compounds of formula (I), wherein the radicals R represent only alkyl radicals which may possibly be substituted by halogen, are valuable plasticizers for polyvinyl chloride, the compounds of formula (I), wherein R=H, alkali metal ions and/or ammonium ions, are valuable gypsum setting retardants and complex-forming agents for metal ions.

Novel phosphonocarboxylic acid compounds

The present invention is related to stabilizer compositions for the stabilization of molding compositions based on halogenated polyolefins, essentially consisting of aluminum salts of certain carboxylic acids, organic phosphites and substituted indoles. Further subject of the invention are the molding compositions which are stabilized with said stabilizers. The stabilizers according to the present invention show an excellent stabilizing effect.

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Bad Soden am Taunus, Germany

Werner Sommer