摘要:
Compounds of the general formula ##EQU1## which may be used in place of malondialdehyde in synthesis reactions are obtained in a one-step reaction form dimethylformamide, phosgene and an alkyl vinyl ether.
摘要:
The invention relates to a process for the production of elastic, compact or cellular moldings based on elastomers containing N-substituted urea and amide groups in bound form, by reactinga) one or more organic and/or modified organic polyisocyanate withb) a polyazomethine-containing polyoxyalkylene-polyamine mixture (b) which contains:bi) one or more polyoxyalkylene-polyaldimine and/or polyketimine,bii) one or more polyoxyalkylene-polyamine containing terminal secondary amino groups, and, if desired,biii) one or more polyoxyalkylene-polyamine containing terminal primary amino groups andc) one or more alkyl-substituted aromatic polyamine having a molcular weight of up to 500, in the presence or absence ofd) catalyst, and, if appropriate,e) blowing agents,f) auxiliaries and/org) additives,to polyazomethine containing polyoxyalkylene - polyamine mixtures which can be used for this purpose and to the prepared elastomers.
摘要:
The present invention relates to a process for the production of elastic, compact or cellular moldings based on elastomers containing N-benzylurea groups in bound form, by reactinga) one or more organic and/or modified organic polyisocyanates withb) N-benzylpolyoxyalkylene-polyamines or mixtures of N-benzylpolyoxyalkylene-polyamines and polyoxyalkylene-polyamines containing from 2 to 4 primary amino groups andc) one or more alkyl-substituted aromatic polyamines having a molecular weight of up to 500,in the presence or absence ofd) catalystsand, if desired,e) blowing agents,f) auxiliaries and/org) additives,and to the N-benzylpolyoxyalkylene-polyamines and mixtures of N-benzylpolyoxyalkylene-polyamines and polyoxyalkylene-polyamines containing from 2 to 4 primary amino groups which can be used for this purpose, and to the elastomers prepared.
摘要:
A process for the preparation of tertiary alkylamines having a total of up to 9 carbon atoms by reacting a dialkylamine with a C.sub.2 -C.sub.4 -alcohol in the presence of a hydrogenation/dehydrogenation catalyst which contains essentially only copper as the hydrogenating/dehydrogenating catalytic metal is proposed, wherein the reactants(a) are present in the liquid phase,(b) contain alkali metal and/or alkaline earth metal oxides and/or hydroxides and(c) are reacted in a molar ratio of dimethylamine to alcohol of from 1:10 to 10:1 and(d) in the presence of the water formed during the reaction.
摘要:
The present invention relates to a process for the production of elastic, compact or cellular moldings based on elastomers containing N-benzylurea groups in bound form, by reactinga) one or more organic and/or modified organic polyisocyanates withb) N-benzylpolyoxyalkylene-polyamines or mixtures of N-benzylpolyoxyalkylene-polyamines and polyoxyalkylene-polyamines containing from 2 to 4 primary amino groups andc) one or more alkyl-substituted aromatic polyamines having a molecular weight of up to 500,in the presence or absence ofd) catalystsand, if desired,e) blowing agents,f) auxiliaries and/org) additives,and to the N-benzylpolyoxyalkylene-polyamines and mixtures of N-benzylpolyoxyalkylene-polyamines and polyoxyalkylene-polyamines containing from 2 to 4 primary amino groups which can be used for this purpose, and to the elastomers prepared.
摘要:
Liquid detergent formulations contain as essential constituents a surfactant and 0.1-20% by weight of a copolymer which contains(a) 50-99 mol % of units of a monoethylenically unsaturated C.sub.3 -C.sub.8 -monocarboxylic acid, a monoethylenically unsaturated C.sub.4 -C.sub.8 -dicarboxylic acid, a half ester of a monoethylenically unsaturated C.sub.4 -C.sub.8 -dicarboxylic acid, an ester of a monoethylenically unsaturated C.sub.3 -C.sub.8 -monocarboxylic acid, a C.sub.2 -C.sub.30 -olefin, styrene, a C.sub.1 -C.sub.3 -alkylstyrene, a C.sub.1 -C.sub.28 -alkyl vinyl ether, a vinyl ester of a saturated C.sub.1 -C.sub.8 -monocarboxylic acid or a mixture thereof and(b) 50-1 mol % of units of an amide of a monoethylenically unsaturated C.sub.3 -C.sub.8 -carboxylic acid where the amide groups have the structure ##STR1## where R.sup.1 is C.sub.8 -C.sub.28 -alkyl or preferably ##STR2## R.sup.3 and R.sup.4 are each H, CH.sub.3 or C.sub.2 H.sub.5, R is C.sub.1 -C.sub.28 -alkyl,n is from 2 to 100 andR.sup.2 is H or R.sup.1,and has a K value of from 8 to 200, or a salt thereof.
摘要:
Aminomono- or di-[(poly-n-butoxy)-n-butylamino]-(poly-n-butoxy)-n-butylamines of the general formula IH.sub.2 N--[(CH.sub.2 CH.sub.2 CH.sub.2 CH.sub.2 O).sub.x --(CH.sub.2).sub.4 --NH].sub.y --(CH.sub.2 CH.sub.2 CH.sub.2 CH.sub.2 O).sub.x --(CH.sub.2).sub.4 --NH.sub.2 (I)where x is from 1 to 150 and y is 1 or 2, are prepared by a process in which a hydroxy-(poly-n-butoxy)-butanol of the formula IIHO--(CH.sub.2 CH.sub.2 CH.sub.2 CH.sub.2 O).sub.x --(CH.sub.2).sub.4 --OH (II)where x is from 1 to 150, is reacted with from 1.01 to 300 mole equivalents of ammonia per hydroxyl group in the presence of a hydrogenation/dehydrogenation catalyst and hydrogen at from 150.degree. to 300.degree. C. and under from 20 to 400 bar.
摘要:
N,N'-dialkyl-substituted cyclic urea derivatives of the general formula I ##STR1## where R.sup.1 and R.sup.2 are each alkyl of 1 to 8 carbon atoms and A is CR.sup.3 R.sup.4 -CR.sup.5 R.sup.6 - or CR.sup.3 R.sup.4 -CR.sup.5 R.sup.6 -CR.sup.7 R.sup.8, where R.sup.3 to R.sup.8 are each hydrogen or alkyl of 1 to 17 carbon atoms, are prepared by reacting a diamine of the formula II ##STR2## with carbon dioxide, by a method in which the reaction is carried out in the gas phase in the presence of an oxide of an element of main group three or four or subgroup two to six of the Periodic Table, or a mixture of these, or in the presence of an aluminum silicate or magnesium silicate.1,3,4-trimethyl-2-imidazolidinone is used as a polar solvent at low temperatures.
摘要翻译:N,N'-二烷基取代的通式I(I)的环脲衍生物,其中R 1和R 2各自是1至8个碳原子的烷基,A是CR 3 R 4 -CR 5 R 6 - 或CR 3 R 4 -CR 5 R 6 -CR 7 R 8,其中 R 3至R 8各自为氢或具有1至17个碳原子的烷基,其通过使式II(II)的二胺与二氧化碳反应的方法通过使反应在气相中进行的方法 主要组分的元素的氧化物存在于元素周期表中主要为三或四元或二至六至六元的元素,或其混合物,或在硅酸铝或硅酸镁存在下。 1,3,4-三甲基-2-咪唑啉酮在低温下用作极性溶剂。
摘要:
In preparing or reacting alkanolamines, especially at high temperatures, the use of substantially nickel-free alloy steels prevents corrosion and discoloration.