Lanxess Deutschland Gmbh

Celanese Gmbh

Rhein Chemie Rheinau Gmbh

Oliver Herd

Wilhelm Laufer

Rolf Sperber

Norbert Weferling

Armin Eckert

Othmar Stelzer

Martina Schoenhaber

Martina Schönhaber

Martina Schonhaber

The present invention relates to processes for producing polymeric carbodiimides by addition of cesium salts and to polymeric carbodiimides produced by this process and to the use thereof as a hydrolysis inhibitor, especially in polyurethane (PU)-based systems, preferably thermoplastic TPU, PU adhesives, PU casting resins, PU elastomers or PU foams.

Method for the synthesis of polymer carbodiimides with added cesium salts, polymer carbodiimides, and use thereof

The present invention relates to novel processes for producing bis[3-isopropenyl-&#x3b1;,&#x3b1;-dimethylbenzyl]carbodiimide, to the thus-produced bis[3-isopropenyl-&#x3b1;,&#x3b1;-dimethylbenzyl]carbodiimide and to the use thereof as a hydrolysis inhibitor in polyurethane (PU)-based systems, preferably thermoplastic TPU, PU adhesives, PU casting resins, PU elastomers or PU foams.

Bis[3-isopropenyl-&#x3b1;,&#x3b1;-dimethylbenzyl]carbodiimide, production methods, and use of said compound

The invention relates to secondary and tertiary phosphines of the formula ##STR1## in which R is hydrogen, an aryl or benzyl group or a straight-chain or branched alkyl group, n is 1 or 2 and M is potassium or sodium. These phosphines are prepared by reacting either alkali metal salts of fluorobenzene-2,4-disulfonic acid with phosphine or with primary or secondary phosphines, or secondary phosphines of the type HP�C.sub.6 H.sub.3 -2,4-(SO.sub.3 M).sub.2 !.sub.2 with a compound RX in which R is an alkyl, aryl or benzyl group and X is a halogen, in an aprotic solvent in the presence of at least stoichiometric quantities of a solid, powdered alkali metal hydroxide at temperatures of from 0 to 100.degree. C.

Secondary and tertiary phosphines and processes for their preparation

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Wuppertal, Germany

Oliver Herd