Abstract:
This invention relates to a composition containing (a) a component selected from the group of a mono- or poly- vinyl substituted mono- or poly-ether, a mono- or poly- vinyl substituted lactam, or a mixture thereof contained in an acidic medium and (b) an aliphatic, primary or secondary mono- or poly-amine at a concentration sufficient to adjust the pH of the composition above
Abstract:
Dyes difficultly soluble or insoluble in water are used together with specific auxiliaries to dye or print textile material made from cellulose fibres, or mixtures thereof with synthetic fibres. These auxiliaries effect an increased dye yield, particularly on the cellulose material, and level tone-in-tone dyeings on mixed fabrics.
Abstract:
The invention relates to a compound (RS)-2-(2-oxo-4-phenylpyrrolidin-1-yl)acetamide having modulatory activity with a commensurate effect, to a pharmaceutical substance (RS)-2-(2-oxo-4-phenylpyrrolidin-1-yl)acetamide containing: 2-(2-oxo-4-phenylpyrrolidin-1-yl)acetamide—no less than 99.0% and no more than 100.5% on dry basis, individual related impurities individually or in total—no more than 0.2%; residual amounts of organic solvents individually or in total—no more than 3000 ppm. The invention also relates to a method for producing the pharmaceutical substance differing in that the obtained raw materials are subjected to purification, crystallization and stabilization of the compound by processing it with demineralized (distilled) water, and the isothermal crystallization from propanol followed by drying. The invention also relates to compositions for internal and external application. The invention provides higher efficacy, safety, stability and width of therapeutic application. 55 cl, 3 dwg, 80 tbl, 27 ex.
Abstract:
A method of storing and transporting N-vinyl-&egr;-caprolactam is provided wherein the N-vinyl-&egr;-caprolactam is kept in the liquid phase.
Abstract:
A process for preparing an N-alkyllactam with improved color quality, wherein from 0.01 to 10% by weight of a C1-10-alcohol or a compound which releases from 0.01 to 10% by weight of a C1-10-alcohol is added to the N-alkyllactam.A mixture comprising at least 99.0% by weight of an N-alkyllactam and in the range from 100 to 5000 ppm by weight of a C1-10-alcohol or of an acetal, aminal or of an Orthoester which releases in the range from 100 to 5000 ppm by weight of a C1-10-alcohol.
Abstract:
The invention provides an N-alkenyllactam having at least a 6-membered lactam ring, stabilized by phenothiazine and/or derivatives thereof, and a process for the stabilization of N-alkenyllactams.
Abstract:
Hexaorgano distannanes of the general formula R.sub.3 Sn--SnR.sub.3 significantly reduce or eliminate the discoloration which occurs when mixtures containing an alkali metal salt of a lactam are stored under an inert atmosphere for extended periods of time at temperatures between ambient and 100.degree. C. R in the foregoing formula represents a monovalent hydrocarbon radical containing between 1 and 20 carbon atoms.
Abstract:
A process for preparing an N-alkyllactam with improved color quality, wherein from 0.01 to 10% by weight of a C1-10-alcohol or a compound which releases from 0.01 to 10% by weight of a C1-10-alcohol is added to the N-alkyllactam.A mixture comprising at least 99.0% by weight of an N-alkyllactam and in the range from 100 to 5000 ppm by weight of a C1-10-alcohol or of an acetal, aminal or of an orthoester which releases in the range from 100 to 5000 ppm by weight of a C1-10-alcohol.
Abstract:
A process for preparing an N-alkyllactam with improved color quality, wherein from 0.01 to 10% by weight of a C1-10-alcohol or a compound which releases from 0.01 to 10% by weight of a C1-10-alcohol is added to the N-alkyllactam.A mixture comprising at least 99.0% by weight of an N-alkyllactam and in the range from 100 to 5000 ppm by weight of a C1-10-alcohol or of an acetal, aminal or of an orthoester which releases in the range from 100 to 5000 ppm by weight of a C1-10-alcohol.