摘要:
Air-drying alkyd resins which are in the form of neutralized semi-esters of hexahydrophthalic acid anhydride constitute an excellent basis for coatings which undergo virtually no yellowing and which, even when aged by heat, show a high constancy of color.
摘要:
A powder lacquer binder composition which comprises a homogeneous crosslinkable mixture comprising: (A) a polymer containing more than one carboxyl group and having a melting and softening point of from 20.degree. to 150.degree. C. (as determined by differential thermoanalysis) and an acid number of from 10 to 150 mg of KOH/g; and (B) a 1,2-polyepoxide which is N,N',N"-triglycidyl triazolidine-3,5-dione having an epoxide value of from 0.6 to 1.13; the mixture containing from 0.5 to 1.5 1,2-epoxide group per carboxyl group; and a process for the preparation thereof.
摘要:
An air-cross-linkable lacquer binder comprising a copolymer of copolymerized units of from 10 to 40% by weight of glycidyl acrylate, glycidyl methacrylate or a mixture thereof, and 70 to 10% by weight of at least one other vinyl monomer which has been reacted with (based in each case on the quantity of lacquer binder) of from 0.01 to 30% by weight of at least one wood preservative having at least one glycidyl-reactive hydrogen atom and from 20 to 60% by weight of at least one air-drying natural or isomerized fatty acid and from 0 to 10% by weight of a dicarboxylic acid anhydride, said lacquer binder having an average molecular weight M.sub.n of from 1500 to 15,000 and an acid number of from 3 to 15. One special advantage of the lacquer binder according to the invention is that the wood preservatives are chemically fixed to the polymer molecule so that their release is retarded and the protective action is prolonged. Another advantage is the possibility to prepare well-drying wood preservative systems with lacquers which have not been treated with drying agents.
摘要:
Phosphite-free polycarbonate molding compositions are provided which contain either a boric acid ester containing oxetane groups, a mixture of a boric acid ester containing oxetane groups and a boron-free oxetane compound or a mixture of a boric acid ester which is free from oxetane groups and a boron-free oxetane compound, in amounts between about 0.01 and 1% by weight, relative to the weight of pure polycarbonate resin. A process for stabilizing phosphite-free polycarbonate compositions to light and heat without impairing their resistance to hydrolysis is also provided by the incorporation of either a boric acid ester containing oxetane groups, a mixture of a boric acid ester containing oxetane groups and a boron-free oxetane compound or a mixture of a boric acid ester which is free from oxetane groups and a boron-free oxetane compound.
摘要:
Phosphites of the general formula: ##STR1## in which N.sub.1 IS AN INTEGER; n.sub.2 is 0 or an integer; n.sub.3 is an integer;At least one of the groups R is an oxetane group as hereinafter defined or a hydrocarbon radical being substituted at least by one oxetane group as hereinafter defined;The remaining groups R are selected from alkyl, aralkyl, cycloalkyl, aryl and hetaryl groups; andThe group or groups Ar are the same or different at-least-divalent aromatic groups the free valencies of which are directly linked to the aromatic nuclei;And a process for their preparation.
摘要翻译:亚磷酸酯,其通式如下:,其中N1是AN INTEGER; N2 IS 0或一个整数; N3是整数; 基团中的至少一个R是下文定义的氧杂环丁烷基团或至少被一个如下文定义的氧杂环丁烷基团取代的烃基; 剩余基团R选自烷基,芳烷基,环烷基,芳基和杂芳基; 和基团Ar是相同或不同的至少二价芳族基团,其自由基直接连接到芳香核上; 及其制备方法。
摘要:
The invention relates to a pulverulent coating material prepared from a polyester which contains free carboxyl groups of succinic acid and cross-linking agents which react with carboxyl groups at elevated temperatures.
摘要:
The present invention relates to coating compounds of which the binder consists essentially of a combination of a) a polyol component dissolved and/or dispersed in water or a water/solvent mixture, and b) a polyisocyanate component emulsified in the solution and/or dispersion of the polyol component with a viscosity at 23° C. of 50 to 10,000 mPa.s, in quantities corresponding to an equivalent ratio of isocyanate groups of component a) to alcoholic hydroxyl groups of component b) of 0.5:1 to 5:1, characterized in that component consists essentially of a1) a water-dilutable, hydroxyfunctional polycondensate resin free from urethane and sulfonate groups and having a molecular weight Mn above 500 or a2) a mixture of such a polycondensation resin with up to 100% by weight, based on the weight of the polycondensation resin, of at least one water-dilutable, hydroxyfunctional polymerization resin having a molecular weight Mn above 500. The present invention also relates to a process for the preparation of these coating compounds and to their use for the production of coatings.