摘要:
Hair-setting compositions comprising A) 0.5 to 20% by weight of a homopolymer of N-vinylcaprolactam or an anionic or nonionic copolymer of at least 70% by weight of N-vinylcaprolactam (polymer A), and B) 0.5 to 20% by weight of a terpolymer (polymer B) obtainable by copolymerization (a) of at least one C1-C4 N-alkylacrylamide or a C1-C4 N-alkylmethacrylamide and (b) at least one C1-C4 hydroxyalkyl ester or a C1-C4 alkyl ester of acrylic acid or methacrylic acid and (c) acrylic acid and/or methacrylic acid C) 0.5 to 20% by weight of a polymer chosen from the group consisting of copolymers of vinylpyrrolidone and a vinyl ester and of homopolymers of vinylpyrrolidone.
摘要:
The present invention relates to soft capsules comprising (a) polymers prepared by polymerization of vinyl esters in the presence of polyethers (b) where appropriate structure-improving auxiliaries and (c) where appropriate other conventional constituents, the use and production thereof.
摘要:
Naphthalenesulfonic acid-formaldehyde condensates are used as assistants in the drying of aqueous polymer dispersions. Also described is a process for preparing polymer powders by drying, using these condensates; the polymer powders obtainable by the process; and their use as binders.
摘要:
A process for preparing an addition-polymer powder suitable for modifying a binding mineral building material by drying an aqueous addition-polymer dispersion whose film has a glass transition temperature Tg≦30° C. and to which a drying assistant has been added comprises adding to the aqueous addition-polymer dispersion before drying only a drying assistant which will have a plasticizing or deplasticizing effect in the ready-to-use mix of the binding mineral building material with water and admixing the resulting dry addition-polymer powder with at least one assistant in the form of a finely divided solid which will have an opposite effect to the drying assistant added before drying.
摘要:
The invention provides for a process for preparing pulverulent polymers by drying aqueous polymer dispersions in the presence of copolymers based on ethylenically unsaturated C.sub.3 -C.sub.6 carboxylic acids and their hydroxyalkyl esters as assistants;polymer powders obtainable by this process;aqueous polymer dispersions obtainable by free-radical aqueous emulsion polymerization of ethylenically unsaturated monomers in the presence of the novel copolymers, and the powders obtainable therefrom, anda polymeric binder as well as and mineral building materials which comprise the novel polymer powders.
摘要:
Phenolsulfonic acid-formaldehyde condensates are used as assistants in the drying of aqueous polymer dispersions.Also described are a process for preparing polymer powders by drying, using these condensates; the polymer powders obtainable by the process; and their use as binders.
摘要:
Polymers I comprising from 15 to 80% by weight of monomers of the general formula I ##STR1## where R.sup.1, R.sup.2 and R.sup.3 are each C.sub.1 -C.sub.3 -alkyl, R.sup.4 is C.sub.1 -C.sub.3 -alkyl and X is O or NH, and from 20 to 85% by weight of other monomers capable of undergoing free radical copolymerization are used as assistants in the spray drying of aqueous dispersions of polymers II which differ from the polymers I. The resultant powders are added to mineral binders.
摘要:
Aqueous dispersions of polymers which have a high glass transition temperature and a low average molecular weight and contain a specific amount of methacrylic acid as polymerized units are suitable, in liquid or dried form, as additives for improving the flow behavior of cement-containing mineral building materials having binding properties.
摘要:
Aqueous polymer dispersions obtainable by incorporating into an aqueous starting dispersion containingA) from 25 to 60% by weight, based on the starting dispersion, of a polymer A as the disperse phase, built up froma) from 3 to 55% by weight of one or more .alpha.,.beta.-monoethylenically unsaturated mono- or dicarboxylic acids containing from 3 to 5 carbon atoms, of an anhydride of these acids or of a mixture of these monomers (monomers a), andb) from 45 to 97% by weight of one or more other copolymerizable monomers (monomer b), in polymerized form and having, in disperse form, a mean particle size of from 20 to 400 nm,B) an effective amount of an emulsifier, andC) water as the remainder, at a temperature below the boiling point of pure water and above the glass transition point of the polymer A, from 5 to 60 mol-%, based on the number of moles of acid functions of the polymer A copolymerized in the form of the monomers a, of one or more of the divalent metals magnesium, calcium and zinc in the form of the oxide, hydroxide, carbonate or bicarbonate or in the form of a mixture of these basic salts, a process for their preparation, binders prepared therefrom, and bitumen-treated roof sheeting produced using these binders.
摘要:
Aqueous (meth)acrylate copolymer dispersions can be prepared by polymerization of the monomers in two stages having different monomer compositions and with the concomitant use of crosslinking monomers in aqueous emulsion at the usual temperatures in the presence of the conventional emulsifiers and polymerization initiators, from 40 to 99.5% by weight of the total monomers being polymerized in the first stage and from 60 to 0.5% by weight of the total monomers being polymerized in the second stage, by a process in which from 0.5 to 10% by weight, based on the total monomers, of (meth)-acrylamidoglycollic acid and /or its methyl ester and/or its methyl ether are polymerized in the second stage and from 0 to 1.8% by weight, based on the total monomers, of the amidoglycollic acid compounds are polymerized in the first stage, and the resulting copolymer dispersions are used as binders for sheet-like textile fibrous structures.