摘要:
The present invention relates to solutions of polyurethanes in organic solvents, wherein the polyurethanes are the reaction products of a) one or more at least difunctional polyols having a number average molecular weight of 500 to 16,000, b) one or more at least difunctional polyisocyanates having a molecular weight of 140 to 1500, c) optionally one or more low molecular weight at least difunctional alcohols and/or amines having a molecular weight of 32 to 500 and d) one or more monoamino-functional heterocyclic compounds. The present invention also relates to a process for preparing these polyurethane solutions and to their use in lacquers, coatings, sealants and/or adhesives.
摘要:
The present invention relates to polyurethane-polyacrylate hybrid dispersions comprising A) 20 to 99% by weight, based on resin solids, of a polyurethane wherein i) the polyurethane is rendered hydrophilic by ionic and/or nonionic hydrophilic groups and ii) the polyisocyanate component used to prepare the polyurethane contains an aliphatic or cycloaliphatic polyisocyanate containing allophanate groups, and B) 1 to 80% by weight, based on resin solids) of a polyacrylate polymer, wherein the sum of components A and B is 100%, based on the total weight of A) and B). The present invention also relates to the use of these hybrid dispersions for coating substrates, in particular wood.
摘要:
The present invention relates to a process for preparing a coated substrate by coating the substrate with an aqueous dispersion, which may be physically cured to form a light stable, elastic coating, containingA) a polyol component containingA1) 20 to 60 wt. %, based on the resin solids content of polyol component A), of a polyester resin containing 10 to 60 wt. %, based on the weight of the polyester resin, of one or more aliphatic, saturated or unsaturated monocarboxylic acids having 8 to 30 carbon atoms, and 0.4 to 5 wt. %, based on the weight of the polyester resin, of one or more radically polymerizable .alpha.,.beta.-unsaturated mono- or di-carboxylic acids having 3 to 8 carbon atoms, or their anhydrides, andA2) 40 to 80 wt. %, based on the resin solids content of polyol component A), of a polyacrylate, which is prepared in the presence of component A1), andB) 1 to 70 wt. %, based on the resin solids content of the aqueous dispersion, of one or more blocked polyisocyanates,and physically curing the dispersion to form a coating.
摘要:
The present invention relates to a process for preparing aqueous binders for aqueous coating compositions by reacting a mixture of A) 9.9 to 85 wt. % of a hydroxy- and acid-functional poly(meth)acrylate andB) 14.9 to 90 wt. % of a hydroxy-functional, fatty acid-modified polyester with C) 0.1 to 20 wt. % of a diisocyanate having a molecular weight of 140 to 318, to form urethane groups and then dissolving or dispersing the reaction product in water with prior or simultaneous neutralization of at least a portion of the carboxyl groups present, wherein the sum of the percentages of A) to C) add up to 100. The present invention also relates to the aqueous binders obtained by this process and their use, optionally combined with other oxidatively drying lacquer resins, in air- and/or heat-drying, two-component coating compositions, preferably aqueous polyurethane coating compositions, or in combination with optionally blocked polyisocyanates and/or amino cross-linking agents in aqueous heat-curing coating compositions.
摘要:
The present invention relates to water dilutable, urethane group-containing polyester polyols having an acid number of 6 to 45 mg KOH/g, wherein 25 to 100% of the acid groups are neutralized by bases, a hydroxyl number of 20 to 250 mg KOH/g, a molecular weight (M.sub.w) of 2,000 to 150,000 and a urethane content (--NH--CO--O--) of 2 to 16% by weight, wherein the polyester polyol is the at least partly neutralized reaction product ofa) 35 to 90% by weight of branched polyester polyols having a hydroxyl number of 40 to 600 and prepared froma1) 0 to 60% by weight of monocarboxylic acids,a2) 6 to 65% by weight of di- and/or tricarboxylic acids or their anhydrides,a3) 10 to 70% by weight of alcohols,a4) 0 to 35% by weight of monoalcohols,a5) 0 to 30% by weight of hydroxycarboxylic acids, aminocarboxylic acids, lactones, lactams and aminoalcohols anda6) 0 to 45% by weight of polycarbonate polyols,b) 0.5 to 8.5% by weight of hydroxycarboxylic acidsc) 0 to 15% by weight of compounds containing OH, NH and/or NH.sub.2 groups and having a molecular weight of 32 to 500,d) 3 to 33% by weight of compounds containing isocyanate groups and having a molecular weight of 168 to 2,000 ande) 0 to 45% by weight of polycarbonate polyols,wherein the percentages of a) to e) and a1) to a6) add up to 100% and wherein the urethane group-containing polyester polyols contain 1 to 25% by weight of carbonate groups (--0--CO--O--) incorporated through components e) and/or a6).
摘要:
A radiographic screen comprising (1) a metal or hydrophobic resin support, (2) a layer comprising a fluorescent phosphor dispersed in an organic polymeric binder and (3) an optionally present outermost organic polymer coating protecting said phosphor layer against abrasion, characterised in that the edges (side surfaces) of said screen are covered with a polymer material being formed essentially from a moisture-hardened polymer composition.
摘要:
The present invention relates to aqueous polyesters for high-solids stoving coatings which containa) 35.0 to 65.0% by weight of a polyester resin containing urethane, carboxyl and hydroxyl groups and containing the reaction product of77 to 89% by weight of a branched polyester polyol having a hydroxyl number of 125 to 175, an acid number of less than 4 and a molecular weight of 2,500 to 6,500,2) 2.5 to 4.5% by weight of a 2,2-bis-(hydroxymethyl)alkane carboxylic acid,3) 0 to 3.5% by weight of a diol component having a molecular weight of 62 to 250 and4) 9 to 19% by weight of a diisocyanate component, wherein the percentages of a1), a2), a3) and a4) add up to 100%, based on the weight of a1), a2), a3) and a4),b) 0.1 to 1.5% by weight of a basic neutralizing agent which is sufficient to convert 35 to 100% of the carboxyl groups of component a) to carboxylate groups,c) 0 to 7.5% by weight of an organic auxiliary solvent andd) 26 to 64.9% by weight water,wherein the percentages of a), b), c) and d) add up to 100%, based on the weight of a), b), c) and d).
摘要:
The present invention relates to binder compositions containingA) 10 to 99 parts by weight of a copolymer component containing at least one copolymer prepared from olefinically unsaturated compositions having a weight average molecular weight of 1,500 to 75,000 and having in chemically bound form both(i) 1 to 30% by weight of cyclic carboxylic anhydride groups (calculated as C.sub.4 H.sub.2 O.sub.3) and(ii) 1 to 29% by weight of epoxide groups (calculated as C.sub.2 H.sub.3 O) andB) 1 to 90 parts by weight of a hydroxyl 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).The present invention also relates to the use of these binder compositions as binders for heat-curing coating compositions or sealing compositions optionally containing paint auxiliaries and additives or as binders for room-temperature-curing sealing or coating compositions containing catalysts and, optionally, other paint auxiliaries and additives.
摘要翻译:本发明涉及粘合剂组合物,其包含A)10至99重量份的共聚物组分,所述共聚物组分含有至少一种由烯属不饱和组合物制备的共聚物,其重均分子量为1,500至75,000,并具有化学键合形式,(i) 1至30重量%的环状羧酸酐基团(以C 4 H 2 O 3计)和(ii)1至29重量%的环氧基团(以C 2 H 3 O计算)和B)1至90重量份的至少含有至少 一个每分子具有至少两个羟基的有机多元醇,条件是对于组分A)的每个酸酐基团,组分B)中都有0.1至10个羟基。 本发明还涉及这些粘合剂组合物作为粘合剂用于热固化涂料组合物或任选地含有涂料助剂和添加剂的密封组合物或用作室温固化密封剂的粘合剂或含有催化剂和任选的其它涂料的涂料组合物的粘合剂 助剂和助剂。
摘要:
The present invention relates to bis-oxazolidines corresponding to formula (II) ##STR1## wherein R represents a branched, saturated, aliphatic hydrocarbon radical containing 5 to 8 carbon atoms.The present invention also relates to oxazolidine mixtures, which are also suitable as hardeners for plastics precursors containing isocyanate groups, consisting essentially ofa) bis-oxazolidines corresponding to formula (II) above andb) 0.03 to 0.3 moles per mole of component (a), of compounds corresponding to formula (III) ##STR2## wherein R represents a saturated, branched, aliphatic hydrocarbon radical containing 5 to 8 carbon atoms.The present invention additionally relates to a process for the production of these oxazolidine mixtures and to their use in combination with polymer precursors containing isocyanate groups for coating or sealing compositions.
摘要:
The present invention relates to aqueous solutions or dispersions of hydroxy-functional copolymers containing imide structural units corresponding to the formula ##STR1## The present invention also relates to a process for the production of these aqueous solutions or dispersions of hydroxy-functional copolymers containing imide structural units by reacting anhydride-functional and optionally carboxyl-functional copolymers corresponding to the hydroxy-functional copolymers with aminoalcohols and optionally aminocarboxylic acids. In a further embodiment of the process the hydroxy-functional copolymers may be reacted with lactones resulting in ring opening and the formation of ester groups.