Abstract: The invention relates to surface-modified nanoparticles composed of metal or semimetal oxides or hydroxides and having been reacted on their surface with a modifier, with formation of covalent bonds. The modifier is a polysiloxane. The invention also relates to a process for preparing the nanoparticles, to their use as fillers in coating materials, plastics, foams and nail varnishes, and to dispersions which comprise the nanoparticles.

Abstract: The invention relates to polyester-modified poly-siloxanes of the general formula (I) where A is an alkyl group having 1 to 8 carbon atoms, Z is an aliphatic group having 1 to 14 carbon atoms, R is an aliphatic and/or cycloaliphatic and/or aromatic poly-ester group containing at least 3 and having a weight-average molecular weight of 200 to 4000 g/mol, with no Zerewitinoff hydrogen atoms, Q is a group which contains no Zerewitinoff hydrogen atoms and is free from reactive carbon-carbon multiple bonds, m is 3 to 200 and o+n=2, with both o and n being other than zero. The invention further relates to the use of the compounds of the invention in thermoplastics, moulding compounds and coating materials.

Abstract: The invention relates to levelling agents for surface coatings having a weight-average molecular weight of from 5000 to 100,000. The levelling agent is a branched polymer comprising a free-radically or ionically polymerized base molecule into which macromonomeric units containing at one end a monomeric unit which has an ethylenically unsaturated bond and possessing a weight-average molecular weight of from 1000 to 30,000 have been incorporated by free-radical or ionic copolymerization, the weight fraction of the macromonomeric units, based on the total weight of the branched polymer, being from 1 to 60% by weight. The invention further relates to the use of appropriate polymers as levelling agents for coating formulations and to coating formulations comprising the levelling agents of the invention.

Abstract: The invention relates to the use of block copolymers as leveling agents for surface coatings, having a weight-average molecular weight of from 1000 to 100000. The leveling agent is a linear or branched block copolymer composed of a polysiloxane block and one or more blocks prepared from ethylenically unsaturated monomers by controlled free-radical addition polymerization.

Abstract: This invention relates to a method of producing modified vinyl ether polymers, wherein vinyl ether polymers comprising recurring units of general formula (I) where R represents a C2-C4 alkyl group and x denotes an integer from 10 to 1000, are partially transetherified with compounds of general formula Y—OH, wherein Y represents aliphatic and/or cycloaliphatic hydrocarbon groups comprising 5 to 30 carbon atoms, the hydrogen atoms of which can be replaced at least in part by halogen atoms and/or aryl radicals, and/or represents aliphatic, cycloaliphatic and/or aromatic groups with a molecular weight of up to 6000 which contain at least one ether group —O— or an ester group —COO— within the molecule, in the presence of compounds of the platinum metals with the release of the corresponding C2-C4 alcohols, wherein statistically at least one R radical is replaced by a Y radical per molecule of vinyl ether polymer.

Abstract: The invention relates to levelling agents for surface coatings having a weight-average molecular weight of from 5000 to 100,000. The levelling agent is a branched polymer comprising a free-radically or ionically polymerized base molecule into which macromonomeric units containing at one end a monomeric unit which has an ethylenically unsaturated bond and possessing a weight-average molecular weight of from 1000 to 30,000 have been incorporated by free-radical or ionic copolymerization, the weight fraction of the macromonomeric units, based on the total weight of the branched polymer, being from 1 to 60% by weight. The invention further relates to the use of appropriate polymers as levelling agents for coating formulations and to coating formulations comprising the levelling agents of the invention.

Abstract: The invention relates to coating compositions having anti-adhesion and dirt repellency properties, these compositions being admixed as additive with from 0.1 to 10% by weight, based on the solids content of the coating composition, of a branched polymer which possesses a weight-average molecular weight of from 2000 to 200,000 and comprises a polymeric base molecule and also polydiorganosiloxane side chains which are bonded covalently to the base molecule via Si—C bonds, have a weight-average molecular weight of between 1000 and 30,000, and whose fraction of the total weight of the branched polymer is from 5 to 25% by weight. The present invention further relates to polymeric moulding compounds having anti-adhesion and dirt repellency properties, to which this branched polymer is added as additive in an amount of from 0.1 to 10% by weight, based on the total weight of the polymeric moulding compounds.

Abstract: This invention relates to free flowing additive preparations, particularly for powder coatings, which can be obtained by incorporating one or more liquid or viscous-adhesive additives in a wax melt consisting of one or more waxes, cooling the mixture obtained to a temperature below its melting point, and comminuting the solidified mixture or converting the mixture which is still liquid into a finely divided form and cooling the particles obtained. The invention also relates to a process for producing such preparations and to their use.

Abstract: Coating compositions and molding compositions containing an amount of alkyl vinyl ether polymer which is effective for improving leveling and/or preventing or eliminating foam, and the use of these copolymers for improving leveling and/or preventing or eliminating foam in coating compositions and molding compositions. The alkyl vinyl ether polymer is a copolymer containing identical or different repeating units of the formula ##STR1## in which R represents a C.sub.1-18 --alkyl group or C.sub.m F.sub.2m+1 --(CH.sub.2).sub.2 --group, where m is a number from 4 to 18, and identical or different repeating units of the formula ##STR2## in which R' represents various groups.

Abstract: Lacquers and molding compositions containing an anti-adhesive character producing and lubricity increasing amount of a polyester-containing polysiloxane corresponding to the formula ##STR1## wherein A, B and D each represent --CH.sub.3 or --Z--R--Q; Z represents an alkylene group with 1 to 11 carbon atoms, --(CH.sub.2).sub.2 SCH.sub.2 --or --(CH.sub.2).sub.3 NHCO--; R represents an aliphatic, cycloaliphatic or aromatic group containing at least 3 carboxylate ester groups and having an average molecular weight Mn of 300 to 3,000; Q represents a reactive group capable of chemically reacting with a resin component of the lacquer or molding composition; x represents a number from 4 to 150; y represents a number from 1 to 6, in which an average molecule contains at least one group --Z--R--Q and the ratio of the number of --Z--R--Q groups to the number x is from 1:3 to 1:30.

Abstract: To produce a de-foamer, mono- and/or poly-functional isocyanate is reacted with mono- and/or polyfunctional amines, preferably in equivalent ratio 0.5:1 up to 1:0.2, in an organic carrier media, to form urea sols at temperatures which lie below the melting temperature of the resulting urea, the organic carrier medium not being a true solvent for the urea. The prepared ureas are represented by the general Formula 1: ##STR1## wherein r=C.sub.4 -C.sub.30 -alkyl; R'=C2-C.sub.12 -alkylene, phenylene or naphthalene with or without substitution by one or more C.sub.1 -C.sub.9 -alkyl groups, or cycloalkylene; R'--H or CH.sub.3 ; R"--H or methyl; and x=0 to 1, and are prepared by reacting isocyanates with amines in organic carrier media to form ureas of Formula 1, at temperatures lying below the melting temperature of the resulting urea, the organic carrier media not being true solvents for the urea.

Abstract: Coating compositions and molding materials containing a polyester group containing siloxane to enhance spreading and increase lubricity, having the formula ##STR1## wherein R.sub.1 represents alkyl groups with 1 to 30 carbon atoms which may be replaced partially by other groups,A and B each represent --CH.sub.3 or R.sub.2 --Z--,R.sub.2 represents an aliphatic and/or cycloaliphatic and/or aromatic polyester group free of Zerewittinoff H atoms, having an average molecular weight of 200 to 3000, and containing at least three ##STR2## groups, Z represents a divalent group connecting the silicon atom with the R.sub.2 group,x is 3 to 250,y is 0 to 50,and in which the average molecule contains at least one R.sub.2 --Z-- group and the ratio of the number of R.sub.2 --Z-- groups to x is 1:2 to 1:40.