Degussa Aktiengesellschaft

Deutsche Gold- Und Silber-scheideanstalt Vormals Roessler

Henkel & Cie G.m.b.h.

Henkel Kommanditgesellschaft Auf Aktien (henkel Kgaa)

Degussa Akteingesellschaft

Henkel U. Cie

Wolfgang Merk

Peter Werle

Volker Binder

Werner Schwarze

Gerhard Pohl

Friedhelm Hoevels

Karl-Heinz Rink

Gerd Schreyer

Horst Weigel

Rudolf M Wagner

Friedbert Nees

Robert S Nygren

Holger Focke

Klaus Popp

Gunther Reissmann

Aromatic mono or polycarboxylic acid glycidyl esters are obtained in good yields and high purity by transesterification of the corresponding aromatic carboxylic acid alkyl esters with glycidol in the presence of weakly toxic catalysts, namely the alkali, ammonium, and alkaline earth metal salts of pseudohalogen hydride acids with readily polarizable anions.

Process for the production of aromatic glycidyl esters

Pentaerythritol is treated at a temperature of about 180.degree. to 220.degree. C. with a strongly alkaline acting material, e.g. calcium oxide. The thus treated pentaerythritol serves as a costabilizer e.g., with the salt of a polyvalent metal and a carboxylic acid, for a vinyl chloride resin, e.g. polyvinyl chloride and has outstanding properties as such.

Alkaline modified pentaerythritol stabilizer for vinyl chloride resin

There are employed water soluble low molecular weight polycondensation products produced by the condensation of acrolein and formaldehyde in a molar ratio between 1:1 and 1:10 in aqueous or aqueous-organic medium in the presence of a basic catalyst for the elimination of hydrogen sulfide and iron sulfide present in aqueous systems. The condensation reaction can also be carried out in the additional presence of water soluble monohydric or polyhydric alcohols and/or acid amides.

Process for the elimination of hydrogen sulfide or iron sulfide from an

There is described new alkylene bismelamines and their production. They correspond to the formula ##STR1## in which o is a number from 10 to 18. Alkylene bismelamines serve as stabilizers for formaldehyde solutions and as such have an outstanding suitability and activity.

Bismelamine stabilizers

There are employed as biocides for aqueous systems water soluble low molecular weight polycondensation products which are produced from acrolein and formaldehyde in the molar ratio between 1:1 and 1:10 in aqueous or aqueous-organic medium in the presence of a basic catalyst. The condensation reaction can also be carried out in the additional presence of water soluble mono- or polyhydric alcohols and/or acid amides.

Use of polycondensation products from acrolein and formaldehyde as

Pure hydroxypropyltheophylline is produced by the catalytic reaction of theophylline with glycidol in the presence of a hydroxide of a short chain alcoholate of an alkali metal or an alkali metal salt of a pseudohydrohalic acid which has a readily polarizable anion. The catalyst is suitably employed in an amount between 0.01 and 0.2 moles per mole of theophylline. The dihydroxypropyltheophylline is obtained directly in the reaction in a high purity.

Process for the production of dihydroxypropyltheophylline

Guaiacol glycerine ether is obtained in very good yield and in very high purity by reacting glycidol with o-methyoxyphenol in the presence of an alkali hydroxide, an alkali alcoholate, an alkali cyanate or an alkali thiocyanate at 80.degree. to 150.degree. C. An especially effective purification of the crude product can be obtained by adding hydrogen peroxide, preferably prior to cooling.

Process for the production of guaiacol glycerine ether

There are described new bisguanamines of the formula ##STR1## where n is a number from 10 to 20 and their production. The bisguanamines are stabilizers for formaldehyde solutions and have outstanding qualifications and action for this purpose.

Bisguanamine

Bisguanamines

There are used as antistatic agents for thermoplastic synthetic resins compounds of the formulae ##STR1## where R and R' are saturated alkyl groups in which the sum of the carbon atoms in the two alkyl groups is 4 to 30 carbon atoms and wherein one of R and R' can be hydrogen,

Antistatic agents for thermoplastic synthetic resins

Skatylhydantoin is prepared by hydrogenation of indolalhydantoin in the presence of a solvent and a hydrogenation catalyst wherein the solvent is a compound of the formula ##STR1## or a mixture of (I) and (II) and in which either R.sub.1 to R.sub.3 are hydrogen or R.sub.1 is hydrogen or a straight or branched chain alkyl group with 1 to 6 carbon atoms and R.sub.2 and R.sub.3 each are straight or branched chain alkyl groups with 1 to 8 carbon atoms or an aryl group, or R.sub.2 and R.sub.3 together are a straight or branched chain alkylene group with 2 to 8 carbon atoms; or one of R.sub.2 and R.sub.3 is hydrogen and R.sub.1 and R.sub.2 or R.sub.3 are joined to form a straight or branched chain alkylene group with 2 to 8 carbon atoms; and R.sub.4 to R.sub.7 each are straight or branched chain alkyl groups with 1 to 8 carbon atoms, an aryl group, an alkaryl group or an aralkyl group, or two of the substituents R.sub.4 to R.sub.7 together also are a straight or branched chain alkylene group with 2 to 8 carbon atoms, wherein the melting point of the solvent (or mixture of solvents) is below 50.degree. C and a noble metal catalyst is used as the hydrogenation catalyst.

Process for the production of skatylhydantoin

There are prepared compounds of the formulae ##STR1## where R and R.sup.1 are saturated alkyl groups in which the sum of the carbon atoms in the two alkyl groups is 4 to 30 carbon atoms and wherein one of R and R.sup.1 can be hydrogen, R.sup.2 is hydrogen, lower alkyl with one to five carbon atoms, 2-hydroxyethyl, 2-hydroxypropyl, 2,3-dihydroxypropyl, benzyl,o-,m- or p-methylbenzyl, o-,m- or p-chlorobenzyl, o-,m- or p-bromobenzyl, aminoalkyl (C.sub.2 to C.sub.6), preferably aminoalkyl (C.sub.2 and C.sub.3), alkyl (C.sub.1 to C.sub.5)-aminoalkyl (C.sub.2 to C.sub.6), 2-hydroxyethyl-aminoalkyl (C.sub.2 to C.sub.6), 2-hydroxypropyl-aminoalkyl (C.sub.2 to C.sub.6) or 2,3-dihydroxy-propyl-aminoalkyl (C.sub.2 to C.sub.6), R.sup.3 in case the compound is present as the ammonium salt is hydrogen or a lower alkyl group with 1 to 5 carbon atoms, and X- is a monovalent, inorganic or organic acid group or one equivalent of a polybasic inorganic or organic group. The compounds are useful as antistatic finishing agents for thermoplastic synthetic resins.

N-2,3-Dihydroxypropyl-N-2-hydroxyalkyl-amine and its salts

There are prepared compounds of the formula ##STR1## where R and R.sup.1 are saturated and preferably linear alkyl groups in which the sum of carbon atoms in the two alkyl groups is 4 to 30,

Growing community of inventors

Hanau, Germany

Wolfgang Merk