摘要:
Soluble polyacetals containing acetaldehyde acetal units are obtainable by cationically initiated addition polymerization of(a) compounds containing at least 3 hydroxyl groups, and(b) divinyl ethers containing terminal vinyl ether groups, or mixtures of such divinyl ethers and monovinyl ethers, in the presence or absence of(c) dihydroxy compounds and/or monohydroxy compounds, and are useful as admixture in phosphate-reduced and phosphate-free detergents and cleaners and as dispersant for finely divided minerals.
摘要:
Condensation products that contain N,O-acetal or carboxamide structures and are useful as detergent and cleaner additives are obtainable by condensation of(a) compounds that contain at least one unit of the structural elements ##STR1## where X is OH or NHR and R is C.sub.1 -C.sub.6 -alkyl or --CH.sub.2 --COOH, with(b) aldehydes, ketones or aldehyde- or keto-carboxylic acids to form acetal-lactones, and subsequent cleavage of the acetal-lactones with(c) aminocarboxylic acids, primary or secondary amines and/or polyethyleneimines.
摘要:
Phosphate-free and low-phosphate detergents which contain surfactants as essential constituents also contain from 0.1 to 20% by weight, based on the particular formulation, of water-soluble or water-dispersible grafted proteins obtainable by free radical copolymerization of(A) monoethylenically unsaturated monomers in the presence of(B) proteins in a weight ratio of (A):(B) of (0.5-90):(99.5-10).
摘要:
Polyacetals useful as reduced-phosphate or phosphate-free detergent and cleaner additives are obtainable by cationically initiated polyaddition of(a) divinyl ethers and(b) dihydroxy compounds and also, optionally,(c) monohydroxy compoundsand have K values of from 8 to 100.
摘要:
Copolymers of hydroxyalkyl vinyl ethers are obtainable by cationic or free radical copolymerization of(a) from 99 to 1% by weight of a hydroxyalkyl vinyl ether,(b) from 1 to 99% by weight of an adduct of a C.sub.2 -C.sub.4 -alkylene oxide with a hydroxyalkyl vinyl ether and(c) from 0 to 98% by weight of other copolymerizable monomers,and the stated copolymer and hydroxyalkyl vinyl ethers polymerized by cationic or free radical polymerization, which contain the monomers (a) or (b) as sole monomers or as a mixture with other copolymerizable monomers in the form of polymerized units, are used as additives for detergents and cleaning agents in amounts of from 0.1 to 50% by weight.
摘要:
Polyacetals useful as reduced-phosphate or phosphate-free detergent and cleaner additives are obtainable by cationically initiated polyaddition of(a) divinyl ethers and(b) dihydroxy compounds and also, optionally,(c) monohydroxy compoundsand have K values of from 8 to 100.
摘要:
The present invention relates to a process for preparing polyisocyanates comprising biuret groups from diisocyanates or polyisocyanates and diamines.
摘要:
The present invention relates to a novel process for preparing colorless, isocyanurate group-comprising polyisocyanates of (cyclo)aliphatic diisocyanates.
摘要:
The invention relates to a process for the preparation of water-soluble polymers containing polyalkylene glycol ether side chains and having molecular weights of from 15,000 to 65,000 by solution polymerization of esters of ethylenically unsaturated carboxylic acids and polyalkylene glycols which are masked on the end groups at one end, if desired together with another monomer in at least one hydrocarbon at monomer concentrations of from 70 to 95% by weight in the presence of free-radical-forming polymerization initiators and, if desired, polymerization regulators at temperatures of up to 200° C., removal of the solvent used in the solution polymerization, and dissolution of the polymers in water to give from 50 to 80% strength by weight solutions, with polymers containing acid groups being neutralized if desired.
摘要:
A process is disclosed for preparing D,L-aspartic acid by beating aqueous solutions of ammonium salts of the maleic acid. The molar ratio of maleic acid to ammonia ranges from 1:1 to 1:50. The process is carried out at temperatures from 60.degree. to 250.degree. C. and pressures of at least 1 bar. The pressure applied during the reaction is adjusted to ensure that the reaction mixture is almost completely present in liquid phase. Excess ammonia is removed and the reaction solution is acidified so as to release D,L-aspartic acid, which is then isolated.