Huels Aktiengesellschaft

Chemische Werke Huls Aktiengesellschaft

Chemische Werke Huels Aktiengesellschaft

Huls Aktiengesellschaft

Degussa Aktiengesellschaft

Chemische Werke

Elmar Wolf

Rainer Gras

Josef Disteldorf

Felix Schmitt

Werner Hubel

Horst Schnurbusch

Johann Obendorf

Rainer Lomoelder

Bernhard Schleimer

Joern Volker Weiss

Wilfried Paulen

Richard Braunstein

Christoph Theis

Heinz Riemer

Werner Huebel

Gunter Dormann

Ansgar Schott

Heike Kelkenberg

Process for the preparation of (cyclo)aliphatic uretdiones of improved color quality

Partially or completely blocked polyisocyanates having an built-in HALS stabilizer.

Blocked polyisocyanates with built-in hals stabilizer

Moisture-crosslinking PU hot-melt adhesives produced by reacting an --NCO containing prepolymer and a sterically hindered polyamine which have a very high initial strength.

Moisture-crosslinking PU hot-melt adhesives

Partially or completely blocked polyisocyanates having a built-in HALS stabilizer.

Blocked polyisocyanates with built-in HALS stabilizer

A process for the preparation of an isocyanurate-free uretdione of isophorphone diisocyanate, comprising dimerizing an isophorone diisocyanate of the general formula: ##STR1## in an inert organic solvent or in the absence of a solvent, with the aid of a catalysts, at a temperature of 0 to 80.degree. C.; isolating the uretdione formed from the reaction mixture after a conversion of 5-70%, without prior deactivation of the catalyst, by thin film distillation at 100-180.degree. C. under 0.01-0.5 mbar; wherein the isophorone diisocyanate has a purity of .gtoreq.99.9% by weight, and the concentration of the unknown first runnings component in a gas chromatogram of the isophorone diisocyanate employed for the dimerization is not greater than 0.05 area%; and wherein R.sup.1 and R.sup.2 are identical or different alkyl radicals having 1-8 C atoms, or with the N atom bonded to the ring, can form a common 5- or 6-membered ring which can contain a CH--CH.sub.3 group, an N--CH.sub.3 group or an O atom instead of a CH.sub.2 group.

Process for the preparation of an isocyanate-free uretdione of

A power coating and a substrate coated with the coating are provided, wherein the coating contains a mixture of

Powder coating and its use for coating heat-resistant substrates

A Polyaddition product, containing uretdione groups, which is obtainable by reaction of (A) a diisocyanate mixture which contains uretdione groups and comprises (1) at least 40 mol % to not more than 80 mol % of isophorone diisocyanate containing uretdione groups and (2) not more than 60 mol % and not less than 20 mol % of hexamethylene diisocyanate containing uretdione groups, with (B) a disecondary diamine, in an NCO/NH ratio of 1:0.5 to 1:0.9 at room temperature to 60.degree. C. in a solvent which is inert towards isocyanates.

Reaction product of mixed uretdiones and a disecondary diamine

Uretdione-functional polyaddition compounds of the formula: ##STR1## Y and Y' are O, NH, or NR.sup.5 ; n is 1-20;

Simplified process for preparing uretdione-functional polyaddition

Uretdione-functional polyaddition compounds of the formula: ##STR1## where: ##STR2## R.sup.1 is R or linear, branched or cyclic alkylene radicals of 2-16 carbon atoms, R.sup.2 and R.sup.3 are identical or different hydrocarbon radicals of 1-14 carbon atoms, R.sup.4 is R.sup.2 or a group ##STR3##

Uretdione-functional polyaddition compounds, a process for their

The invention relates to cold-curing, low-solvent or solvent-free 2-component polyurethane/polyurea compositions comprising a reaction product of:

Cold-curing, low-solvent or solvent-free 2-component

Isocyanurate- and uretdione-group-containing polyaddition product of an isophorone diisocyanate comprising the reaction product of:

Polyaddition product containing isocyanurate groups and uretdione

A liquid one-component PU stoving enamel is provided along with its synthesis, where the stoving enamel contains a) a hydroxyl-containing polymer; b) a partially or totally blocked isophorone-based polyisocyanate containing uretdione groups; c) an organic bismuth compound catalyst, and d) an organic solvent or mixture of two or more organic solvents, wherein components a and b are present in a total (a+b) amount of from 40 to 70 parts by weight based on total composition weight, component c is present in an amount of from 0.5 to 5 parts by weight based on total composition weight; and component d is present in an amount of from 30 to 60 parts by weight based on total composition weight; and wherein a and b are each present in amounts sufficient to provide an OH/NCO equivalents ratio of from 0.8 to 1.2 NCO equivalents of component b per OH equivalent of component a.

Liquid one component PU stoving enamels

Polyamines containing tert-butyl (meth)acrylate groups and having the general formula I ##STR1## wherein R.sup.1 represents a (cyclo)alkylene radical having 2-14 carbon atoms, which may optionally be substituted by 1-3 CH.sub.3 or C.sub.2 H.sub.5 groups and 1-3 CH.sub.2 groups may be substituted by oxygen or --NH--, --NCH.sub.3 -- or --C(O)NH-- groups, R.sup.2 denotes hydrogen or methyl and x may be a number between 1 and 0 with the proviso that 2(1-x).gtoreq.0.1, are effective epoxy curing agents.

Polyamines containing tert-butyl (meth) acrylate groups

A compound containing cyclic amidine groups and uretdione groups, having the formula: ##STR1## wherein X is O or NR.sup.2, R is the hydrocarbon radical of isophorone diisocyanate: ##STR2## R.sup.1 is a substituted (cyclo)alkylene radical which is substituted with O-3 CH.sub.3 groups and has 2-14 carbon atoms @

Compounds containing cyclic amidine and uretdione groups, a process for

A flexible epoxy resin system is prepared by incorporating a combination of hardeners (A) and (B) in an epoxy resin, wherein the amounts of the two hardeners are varied to adjust the flexibility of the epoxy resin.

Growing community of inventors

Recklinghausen, Germany

Elmar Wolf