摘要:
An aqueous coating composition including a combination of hydroxyl group-containing polyols and blocked polyisocyanate cross-linking agents, which dries preferably in pulverulent manner on the surface to be coated and, after stoving, affords coatings having a high resistance to water, chemicals and solvents, in particular on metallic substrates, and a process for the production of the coating composition.
摘要:
The present invention relates to binder compositions containingA) 40 to 95 parts by weight of OH-functional graft copolymer resins prepared by copolymerizinga) 0.1 to 10 parts by weight of polybutadienes containing at least 20% of 1,2-vinyl groups,b) 5 to 30 parts by weight of aliphatic .alpha.-olefins,c) 0.1 to 35 parts by weight of glycidyl esters of .alpha.-alkylalkane-monocarboxylic acids,d) 10 to 70 parts by weight of unsaturated, aromatic monomers,e) 5 to 60 parts by weight of hydroxyalkyl esters of acrylic and/or methacrylic acid having primary hydroxyl groups,f) 0 to 50 parts by weight of (cyclo)aliphatic esters of acrylic and/or methacrylic acid,g) 0.1 to 20 parts by weight of .alpha.,.beta.-mono-olefinically unsaturated monocarboxylic or dicarboxylic acids and/or maleic acid or fumaric acid semi-esters andh) 0 to 30 parts by weight of other copolymerizable compounds andB) 5 to 60 parts by weight of polyfunctional crosslinking resins,wherein 1 to 30% by weight of the OH groups of the component A) are secondary OH groups. The present invention also relates to the use of these binder compositions for vehicle coatings, in particular automotive refinish coatings and large vehicle coatings, for wood and furniture coatings, general industrial coatings, and for coatings that provide corrosion protection.
摘要:
The present invention relates to binder compositions containing A) 40 to 95 parts by weight of OH-functional graft copolymer resins which are prepared by copolymerizing a mixture containing 0.1 to 10 parts by weight of at least one optionally functional polybutadiene having a molecular weight of 500 to 10,000 and having at least 20% by weight of side-chain 1,2-vinyl double bonds, and B) 5 to 60 parts by weight of a polyfunctional cross-linking resin selected from aminoplast resins and optionally blocked polyisocyanates, wherein the sum of the parts by weight of components A) and B) add up to 100, based on the weight of components A) and B). The present invention also relates to the use of the binder compositions according to the invention for lacquering vehicles, wood and furniture, and for preventing corrosion.
摘要:
The present invention relates to powder coating compositions wherein the binder contains copolymers which are solid below 30.degree. C., prepared from olefinically unsaturated compounds and have a weight-average molecular weight (M.sub.w) of 1500 to 75,000, a content of free hydroxyl groups of 0.2 to 6.0% by weight and a content of intramolecular carboxylic acid anhydride groups (calculated as C.sub.4 H.sub.2 O.sub.3) of 1 to 30% by weight.
摘要翻译:本发明涉及粉末涂料组合物,其中粘合剂含有固体低于30℃的共聚物,由烯属不饱和化合物制备,重均分子量(Mw)为1500至75,000,游离羟基含量为 0.2〜6.0重量%,分子量内羧酸酐基(C 4 H 2 O 3计算)含量为1〜30重量%。
摘要:
A powder coating composition for the production of non-yellowing, flexible coatings which contains a mixture of a polyisocyanate component which contains one or more lacquer polyisocyanates having free (unblocked) isocyanate groups bound to primary and/or secondary carbon atoms and a polyol component containing one or more polyhydroxyl compounds selected from polyhydroxy polyurethanes, polyhydroxy polyacrylates and polyhydroxy polyesters, wherein at least 50% of the hydroxyl groups are bound to secondary or tertiary carbon atoms; and its use for coating heat-resistant substrates, in particular as clear coating compositions for automobiles.
摘要:
The present invention relates to a process for the production of polyhydroxyl compounds having a hydroxyl group content of 2 to 10% by weight and a viscosity at 23.degree. C. of 250 to 80,000 mPa.s by the radically initiated polymerization at a reaction temperature of 80.degree. to 220.degree. C. ofa) 100 parts by weight of a mixture of olefinically unsaturated monomers containing at least 1% by weight of monomers containing alcoholic hydroxyl groups in the presence ofb) 5 to 500 total parts by weight, which may be present at the beginning of the reaction or added during the reaction, of one or more cyclic compounds which, in the presence of initiator compounds containing alcoholic hydroxyl groups, are capable of a ring-opening polymerization reaction andc) 2 to 300 parts by weight, which may be present at the beginning of the reaction or added during the reaction, of one or more polyhydric alcohols having a molecular weight of 62 to 1000.The present invention also relates to the polyhydroxyl compounds obtained by this process and to their use in combination with suitable hardeners as binders for one-component or two-component coating compositions.
摘要:
A process for the solvent-free production of hydroxy-functional copolymers by copolymerization of unsaturated monomers in a mixture of a polyester component and an unsaturated ester component as reaction medium, the use of the hydroxy-functional copolymers so obtained as binder component in polyurethane powder coatings, a powder coating based on these copolymers and its use for coating any heat resistant substrates.
摘要:
The present invention relates to coating compositions in pulverulent form which are solid below 30.degree. C. and liquid above 150.degree. C. and containA) 10 to 99 parts by weight of a copolymer component containing at least one copolymer which is prepared from olefinically unsaturated compounds, has a weight average molecular weight of 1500 to 75,000 and contains in chemically bound form(i) 1 to 30% by weight of cyclic carboxylic acid anhydride groups (calculated as C.sub.4 H.sub.2 O.sub.3) and(ii) 0.3 to 10% by weight of epoxide groups (calculated as C.sub.2 H.sub.3 O), andB) 1 to 90 parts by weight of a polyol component containing at least one organic polyol having at least two hydroxyl groups per molecule,provided that for every anhydride group of component A) there are 0.1 to 10 hydroxyl groups of component B).
摘要:
The present invention relates to powder coating compositions which are solid below 3O.degree. C. and contain a mixture ofA) a copolymer component which is solid below 3O.degree. C. and contains at least one copolymer containing both cyclic carboxylic anhydride groups and hydroxyl groups,B) a polyepoxide component which contains at least one polyepoxide containing at least two epoxide groups per molecule.