Abstract: The present invention relates to a process for the production of organic polyisocyanates containing at least partly blocked isocyanate groups characterized in that specific cyclic dicarbonyl compounds are used as the blocking agent. The present invention also relates to the polyisocyanates containing at least partly blocked isocyanate groups obtainable by this process and to the use of the polyisocyanates containing at least partly blocked isocyanate groups obtainable by this process as reactants for isocyanate-reactive compounds for the production of isocyanate polyaddition products.The present invention also relates to the use of polyisocyanates containing at least partly blocked isocyanate groups obtainable by the above process for the production of aqueous stoving lacquers and to the use of these polyisocyanates for the production of aqueous polyisocyanate solutions or dispersions.

Abstract: This invention relates to a new process for the preparation of storage stable aqueous dispersions or solutions of cross-linkable polyurethane polyureas containing heat activated cross-linking agents, in which mixtures of hydrophilically modified prepolymers containing isocyanate groups, hydrophobic polyisocyanates which contain blocked isocyanate groups and are neither soluble nor dispersible in water, and compounds containing at the most one free aminic or hydrazinic primary or secondary amino group and at least one blocked group which under the influence of water forms a free aminic or hydrazinic primary or secondary amino group and a total of at least two such amino groups are prepared in the absence of water and then mixed with water, and it also relates to the aqueous dispersions or solutions obtained by this process and to their use for the production of coatings on heat-resistant substrates.

Abstract: Melts of Urethane-modified oligoesters and 1 or polyesters can easily be dispersed in an aqueous phase in the presence of a dispersing agent combination comprising a polyether-modified polyester and a non-ionic dispersing agent having a particular HLB value.

Abstract: Aqueous dispersions of polyesters or alkyd resins for coatings are prepared by co-condensation of 10 to 100 mol-%, calculated on the sum of polybasic carboxylic acids, of polybasic acids whose carboxyl groups are attached to secondary and/or tertiary carbon atoms. Said dispersions are excellently stable and yield coatings with outstanding properties.

Abstract: An aqueous dispersion of an epoxide compound comprising water, one or more water-insoluble 1,2-epoxide compounds having mol weights Mn of from between 150 and 3000 and an emulsifying system comprising:(A) from 9.5 to 35% by weight of at least one polyester resin containing carboxyl groups having an acid number of from 10 to 50 mg KOH/g substance and a molecular weight Mn of from 400 to 4000, at least 30% of the carboxyl groups being neutralized;(B) from 0.5 to 25% by weight of at least one emulsifier having an HLB-value.gtoreq.15 and represented by the formula: ##STR1## wherein R.sup.1 represents a C.sub.1 -C.sub.16 -alkyl group,R.sup.2 represents H or a C.sub.1 -C.sub.16 -alkyl group,R.sup.3 represents H or methyl,n represents a number from 10 to 50;(C) from 40 to 90% by weight of at least one emulsifier having an HLB-value of 15 and the general formula: ##STR2## wherein R.sup.2 is previously defined, R.sup.4 represents C.sub.1 -C.sub.

Abstract: Blocked polyisocyanates with improved water-dispersible or water-soluble properties are prepared by reacting polyisocyanates, in which 50 to 99.8% of the isocyanate groups are blocked, optionally in a solvent-free environment with an organic polyaminosulphonate or an organic polyaminosulphonic acid in sufficient quantities to provide an end product containing from 0.1 to 10%, by weight, of sulphonate groups (SO.sub.3.sup.-). The blocked polyisocyanates have particular utility when used in combination with hydrophobic polyhydroxyl compounds as binders in aqueous coating compounds.

Abstract: A chlorinated colorless polyolefin, preferably a chlorinated colorless isotactic polypropylene, soluble in carbon tetrachloride and having a chlorine content of from 60% to 70% by weight and an average degree of polymerization of from 2000 to 6000, produced by chlorinating polyolefins having a degree of polymerization of from 2000 to 20,000 in suspension or solution or in suspension and solution at 40 to 60.degree. C. in the presence of a halogen transfer agent, a chlorination catalyst and from 0.2 to 0.5% by weight, based on polyolefin, of at least one compound corresponding to the general Formula (I):h.sub.2 n--r--nh>.sub.n H (I)in which R represents the ethylene, propylene or butylene group and n=1-6.