摘要:
Phosphate-containing, glycol-based coolant mixtures which are stable in hard water and are free of nitrites, silicates, amines and borates containa) 0.5-3% by weight of ammonium and/or alkali metal phosphateb) 2-5.5% by weight of ammonium or alkali metal benzoatec) 0.2-1.5% by weight of ammonium or alkali metal molybdated) 0.2-0.8% by weight of ammonium or alkali metal nitratee) 0.05-0.4% by weight of benzotriazolef) 0.05-0.4% by weight of tolyltriazoleg) 0.005-0.35% by weight of a water-soluble magnesium compoundh) 0.02-0.5% by weight of an oligomeric or polymeric carboxylic acid with a molecular weight of 1,000-100,000,i) 0.05-5% by weight of water and the amount of glycol necessary to make up to 100% by weight.
摘要:
Quaternized imidazoles I ##STR1## in which R.sup.1 and R.sup.3 independently of one another are saturated or unsaturated hydrocarbon radicals of 1-12 carbon atoms which can be substituted by oxygen-functional groups or interrupted by nonadjacent oxygens,R.sup.2, R.sup.4 and R.sup.5 independently of one another are hydrogen or saturated or unsaturated hydrocarbon radicals of 1-12 carbon atoms which can be substituted by oxygen-functional groups or interrupted by nonadjacent oxygens, it being possible for R.sup.4 and R.sup.5, together with the corresponding imidazole carbons, to form a five- or six-membered ring, andX.sup..crclbar. is an anion,are used as corrosion inhibitors in the corrosion protection of nonferrous metals, especially for car radiator protection.
摘要:
A description is given of antifreeze concentrates which comprise a) at least one water-miscible alcohol which lowers the freezing point; b) at least one corrosion inhibitor; and c) as reserve alkalinity donor, at least one mono- or polycyclic aromatic compound which has at least one hydroxyl group and a high buffer capacity in the pH range from about 6 to 10 and of coolant compositions which comprise said concentrates and are intended for the cooling circuits in internal combustion engines.
摘要:
The present invention relates to novel silicate-, borate- and nitrate-free antifreeze concentrates based on alkylene glycols or derivatives thereof which include an inhibitor combination essentially comprising salts of carboxylic acids together with hydrocarbon-triazoles and/or -thiazoles. These antifreeze concentrates are, in particular, entirely free from any salts of inorganic acids as corrosion inhibitors. The invention also relates to ready-to-use aqueous coolant compositions comprising these antifreeze concentrates.
摘要:
Antifreeze concentrates based on alkylene glycols or derivatives thereof or on glycerol, comprising from 0.0005 to 0.1% by weight of the dye C.I. Reactive Violet 5 (Color Index No. 18097), based on the total amount of the concentrate.
摘要:
A heat transfer liquid concentrate comprises, in addition to at least one glycol, a) from 0.05 to 10, preferably from 0.1 to 5, % by weight of one or more aliphatic amines of the formula (I), where R1 to R3 may be identical or different and are hydrogen, optionally branched C1-C9-alkyl or C1-C9-hydroxyalkyl, b) from 0.005 to 3, preferably from 0.01 to 1, % by weight of one or more silicates which may have been stabilized, c) from 0 to 3% by weight of one or more corrosion inhibitors selected from the group consisting of the hydrocarbon-triazoles and of the hydrocarbon-thiazoles, d) from 0 to 5% by weight of one or more alkali metal, ammonium or substituted ammonium molybdates and e) from 0 to 1% by weight of one or more polymeric hard water stabilizers. The concentrates, if required after prior dilution with water, are particularly suitable for use in solar plants in which a heat transfer liquid is in direct contact with the glass of the solar plant.
摘要翻译:传热液体浓缩物除了至少一种二醇之外还包含a)0.05至10重量%,优选0.1至5重量%的一种或多种式(I)的脂族胺,其中R 1 R 3可以相同或不同,为氢,任选支链C 1 -C 9 - 烷基或C
摘要:
The present invention relates to aqueous coolants having vapor-space corrosion inhibiting properties, in particular for the run-in phase of internal combustion engines, after which the coolant is drained (engine run-in fluids), containing at least one ammonium salt of phthalic acid monoamides of the following formula (I), where R1 and R2 may be identical or different and are hydrogen or a linear or branched, cyclic or acyclic C1-C2o-alkyl radical and A+ is an ammonium cation.
摘要:
An antifreeze concentrate for cooling systems in fuel-cell drives which gives ready-to-use aqueous coolant compositions having a conductivity of at most 50 μS/cm, based on alkylene glycols or derivatives thereof and containing one or more five-membered heterocyclic compounds (azole derivatives) having 2 or 3 hetero atoms from the group consisting of nitrogen and sulfur, which contain no or at most one sulfur atom and which may carry a fused aromatic or saturated six-membered ring.
摘要翻译:一种用于燃料电池驱动器中的冷却系统的防冻浓缩物,其提供基于亚烷基二醇或其衍生物并含有一种或多种五元杂环化合物的导电率至多为50μS/ cm 2的即用型水性冷却剂组合物( 唑类衍生物),其具有2或3个来自氮和硫的杂原子,其不含或最多一个硫原子,并且可带有稠合芳族或饱和六元环。
摘要:
An antifreeze concentrate for cooling systems in fuel-cell drives which gives ready-to-use aqueous coolant compositions having a conductivity of at most 50 μS/cm, based on alkylene glycols or derivatives thereof and containing one or more five-membered heterocyclic compounds (azole derivatives) having 2 or 3 hetero atoms from the group consisting of nitrogen and sulfur, which contain no or at most one sulfur atom and which may carry a fused aromatic or saturated six-membered ring.
摘要:
Hydraulic fluids, in particular brake fluids for motor vehicles, comprising from 0.01 to 50 wt % of one or more cyclic carboxylates, or cyclic carboxamides, which can carry a linear or branched C1-bis C20 alkyl group on the nitrogen atom.