Inventor

ZENGEL HANS

28 patents

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ZENGEL HANS

AKZONA INC

Polyfunctional isocyanates free of alkali and urea groups

Thick polyimide-metal laminates with high peel strength

Preparation of trans cyclohexane 1,4-diamine

Preparation of trans cyclohexane 1,4 diisocyanate

Process for the preparation of nitrosobenzene

Preparation of trans cyclohexane 1,4-diurea

Preparation of trans cyclohexane,1,4-diisocyanate and related compounds

Preparation of trans cyclohexane 1,4-diisocyanate

Preparation of trans-cyclohexane-1,4-disulphonyl urea

Process for the preparation of dithiazole-disulfides

Preparation of trans-cyclohexane-1,4-diurethanes

Benzene-1,3,5-tris-acetoxime and the process for making phloroglucinol therewith

Benzene-1,3,5-tris-acetoxime and the process for making phloroglucinol therewith

Process for the preparation of para-nitroso-diphenylhydroxylamines

Benzene-1,3,5-tris-acetoxime and the process for making phloroglucinol therewith

Process for the preparation of isocyanate derivatives of aliphatic, cycloaliphatic, and araliphatic compounds

Process for the preparation of nitrosobenzene

Process for the preparation of nitrosobenzene

AKZO NV

Process for the preparation of N,N&#39;-disubstituted guanidines

Method for making silica fibers

Process for the production of thiazolyl-2-sulphenamides

Thermoplastic polyurethane-elastomers from cyclohexane-1,4-diisocyanate

Water-containing water glass fibers

Method for making silica fibers

Polyurethanes from trans-cyclohexane-1,4-diisocyanate

Process for the production of aromatic and cycloaliphatic dicarboxylic acid diamides

Process for the preparation of organic mono- and polyisocyanates

Process for the preparation of aqueous ammonium thiocyanate solutions

Process for the preparation of N,N'-disubstituted guanidines