Abstract:
A process is disclosed for preparing water-soluble, carboxyalkylated, amino group-containing polymers by reacting water-soluble, amino group-containing polymers with at least one aldehyde and one alkaline cyanide or with a cyanhydrin from an aldehyde and an alkaline cyanide in an aqueous solution at temperatures from 60 to 110 DEG C. Also disclosed is the use of the carboxyalkylated polymers which contain amino groups and of the N-oxides derived therefrom as auxiliary agents for the production of paper, as additives of washing and cleaning agents and as complexing agents during wood pulp bleaching, cellulose bleaching, cellulose production and de-inking of used printed paper.
Abstract:
Disclosed is the use of heterocyclic compounds of the formula (I) R -X-L, in which: L stands for a cyclic carbamate group, lactone oxy group or lactam group, X stands for an oxygen-containing group of one of the formulae (a), (b), (c), (d), (e) or (f), in which A represents a bridging group; and R indicates an organic group or an L group, as activators for inorganic peroxy compounds, in particular as cold bleach activators or optical brighteners in washing, cleaning and bleaching agents and in disinfectants.
Abstract:
N-benzyliminium salts have formula (I), in which R and R represent independently from each other hydrogen or optionally substituted alkyl, alkenyl, cycloalkyl, aralkyl, heteroaralkyl, aryl or heteroaryl, provided that at least one of the rests R or R has at least 5 C atoms, if it is an aliphatic rest, or at least 7 C atoms, if it is a cyclic rest; R stands for an organic or inorganic substituent; m equals 1, 2 or 3; and X stands for an oxidation-resistant anion, while n indicates the valence of anion X. These N-benzyliminium salts are used as bleach catalysts, in particular in textile washing and bleaching systems.
Abstract:
The invention relates to the use of tri-acids of formula (I) in which X to X are mutually independently carboxylic acid groups of the formula COOM, sulphonic acid groups of the formula SO3M or phosphonic acid groups of the formula PO3M2, in which M is hydrogen, alkaline metal, ammonium or substituted ammonium, A to A are mutually independently 1,2 alkylene with 2 to 18 C atoms, R to R are mutually independently C1 to C8 alkylene and x, y and z are mutually independently a number from 0 to 10, in which the sum x+y+z is greater than or equal to 1, as complex formers for complexing heavy metals or for the production of heavy metal complexes to alter the redox potential and as builders in washing and cleaning agents.
Abstract:
The present invention pertains to salts of aromatic hydroxyl compounds of the general formulas (I and II), wherein m, n, R , R , R , R , R , R and Ar are as indicated in the description and X is an alkali metal, alkaline earth metal atom or an amonium radical, and to their use as brighteners in acid electroplating baths. The invention also pertains to acid electroplating baths used for electrolytic deposition of metallic layers on shaped parts, the baths comprising as brightener at least one of the claimed salts of an aromatic hydroxyl compound. Finally, the invention pertains to a method of electrodeposition coating of shaped parts using the claimed acid electroplating baths.
Abstract:
The proposed method of producing free N-acyl amino-carboxylic and sulphonic acids from their alkali metal salts produced without solvents involves precipitation with aqueous acids. This is done by adding to the alkali metal salts a quantity of the appropriate free N-acyl amino-carboxylic and sulphonic acids equivalent to 5-100 wt % of the quantity of alkali metal salts before mixing with the aqueous acids.
Abstract:
Hydroxamic acids and hydroxamic acid ethers have formulae (I) and (II), in which Z and Z stand for the groups -NH-OY, -NR or Z in (I) or the residue Z in (II) being -NH-OY or -NR -OY; R stands for C1-18-alkyl; X stands for hydrogen, alkaline metal, ammonium or substituted ammonium; Y stands for hydrogen, alkaline metal, ammonium, substituted ammonium or C1-18-alkyl; and L stands for a C1-100 bridging member which may also bear oxygen- and nitrogen-function groups. Excepted is the N,N-bis(carboxymethyl)-2-aminoacethydroxamic acid. The compounds (I) and (II) are suitable as complexing agents for alkaline earth and heavy metal ions, in particular as builders or bleaching agent stabilizers in washing and cleaning products.
Abstract:
N-alkanoyl-polyhydroxyalkylamines having the formula (I), in which Z stands for the polyhydroxyalkyl residue of a mono- or oligo saccharide; R stands for hydrogen or C1-C8-alkyl and R stands for C1-C21-alkyl are prepared by reaction of polyhydroxyalkylamines having the formula (II): Z-NH-R , with carboxylic acid alkyl esters having the formula (III), in which R stands for a C1-C4-alkyl residue, in the presence of a basic catalyst. For that purpose, (a) the total amount of the ester (III) is taken, is heated up to the reaction temperature and the amine (II) is precisely added thereto as a molten mass while the reaction is in progress, the resulting alcohol represented by the formula R -OH being continuously distilled away; (b) the reaction is carried out at a temperature from 55 to 110 DEG C; and (c) the reaction is carried out in the absence of organic solvents.
Abstract:
A process is disclosed for preparing N-allyl compounds having general formula (I), in which (II) stands for a N-containing aromatic heterocycle; R?1, R3 and R4¿ represent independently from each other hydrogen or C¿1?-C4-alkyl; R?2¿ stands for hydrogen or methyl; n equals 1, 2, 3 or 4 and X- is an anion for rendering water-soluble. The process is characterized in that compounds having formula (II) are reacted in an aqueous medium with compounds having formula (III), in which A stands for a residue which can be split as an anion. These compounds are very suitable as brighteners for nickel-plating.
Abstract:
The invention relates to a process for producing beta-alanine diacetic acid (Ia) or its alkali metal or ammonium salts (Ib) in which imino diacetic acid is caused to react with acryl nitrile or C1-C4 alkyl acrylic acid esters in a slightly acid to slightly basic aqueous medium and then the nitrile or ester groups are saponified to the acid or a salt. The products made according to the invention are particularly useful as complex formers.