摘要:
The invention relates to polymer dispersions or polymer solutions that are given antibacterial and fungicidal properties by metal ions of group Ib of the Periodic table. According to the invention, a) the polymer dispersions or polymer solutions are not produced using controllers that contain thiol groups, b) the metal ions have been introduced by means of an electrochemical process and c) said dispersions or solutions do not contain any active quantity of organic biocides.
摘要:
Dosage forms provided with protective coatings in which a core comprising at least one acidic active ingredient is provided with at least one inner and one outer coating layer, where the outer layer comprises, as component A, a cationic polymer which is an emulsion polymer of N,N-diethylaminoethyl methacrylate and further monomers.
摘要:
The present invention relates to a polymeric composition for coating solid substrates (S) consisting of: a) 0.5-90% by weight of polyethylene glycol with a weight-average molecular weight in the range from 1500 to 20 000 g/mol (component A), b) 0.5-20% by weight of a water-soluble polyvinylpyrrolidone with a Fikentscher K value in the range from 12 to 90 (component B), c) 0-95% by weight of a solvent (L), and d) 0-70% by weight of one or more non-polymeric aids (component C).
摘要:
The present invention relates to a process for preparing an aqueous polymer dispersion by free-radical emulsion polymerization of a monomer mixture which comprises N,N-diethylaminoethyl methacrylate, to the polymer dispersion obtainable by this process, and to the use thereof.
摘要:
A process for preparing (meth)acrylic esters (F) of N-hydroxyalkylated lactams, in which cyclic N-hydroxyalkylated lactams (L) in whichR1 is C1-C5-alkylene, or C2-C20-alkylene interrupted by one or more oxygen and/or sulfur atoms and/or one or more substituted or unsubstituted imino groups and/or by one or more cycloalkyl, —(CO)—, —O(CO)O—, —(NH)(CO)O—, —O(CO)(NH)—, —O(CO)— or —(CO)O— groups, where the radicals mentioned may each be substituted by aryl, alkyl, aryloxy, alkyloxy, heteroatoms and/or heterocycles,with the proviso that R1 must not have any atom other than a carbon atom directly adjacent to the lactam carbonyl group,R2 is C1-C20-alkylene, C5-C12-cycloalkylene, C6-C12-arylene, or C2-C20-alkylene interrupted by one or more oxygen and/or sulfur atoms and/or one or more substituted or unsubstituted imino groups and/or by one or more cycloalkyl, —(CO)—, —O(CO)O—, —(NH)(CO)O—, —O(CO)(NH)—, —O(CO)— or —(CO)O— groups, where the radicals mentioned may each be substituted by aryl, alkyl, aryloxy, alkyloxy, heteroatoms and/or heterocycles, orR2—OH is a group of the formula —[Xi]k—H,k is from 1 to 50 andXi, for each i=1 to k, may each independently be selected from the group of —CH2—CH2—O—, —CH2—CH2—N(H)—, —CH2—CH2—CH2—N(H)—, —CH2—CH(NH2)—, —CH2—CH(NHCHO)—, —CH2—CH(CH3)—O—, —CH(CH3)—CH2—O—, —CH2—C(CH3)2—O—, —C(CH3)2—CH2—O—, —CH2—CH2—CH2—O—, —CH2—CH2—CH2—CH2—O—, —CH2—CHVin—O—, —CHVin—CH2—O—, —CH2—CHPh—O— and —CHPh—CH2—O—, in which Ph is phenyl and Vin is vinyl,in the presence of at least one metal salt of C1-C10-alkoxides (A), is esterified with (meth)acrylic acid (S) or transesterified with at least one (meth)acrylic ester (D), in which the metal salt of C1-C10-alkoxides (A) used as a catalyst is added in the absence of solvents and completely at the start of the reaction.
摘要:
The present invention relates to water-soluble or water-dispersible copolymers obtainable by free-radical polymerization of a) 80 to 20% by weight of hydroxy-C1–C6-alkyl (meth)acrylate and, where appropriate, one or more compounds of the formula (A) or (B) with R1=H, C1–C6-alkyl, R2=H, CH3 R3=C1–C24-alkyl or mixtures thereof in the presence of b) 20 to 80% by weight of polyvinyl alcohol (PVA) and c) where appropriate 0 to 20% by weight of other polymerizable compounds (C), a process for their preparation, and their use as coating agent, binder and/or film-forming excipient in pharmaceutical dosage forms.
摘要:
A quick dissolving film coating composition for coating solid substrates is composed of a) 10-90% by weight of a polyvinyl alcohol-polyether graft copolymer (component A), b) 5-80% by weight of at least one further component containing at least one functional group selected from the group consisting of hydroxyl, amide and ester functions (component B), and c) 0-70% by weight of further customary coating constituents (components C).
摘要:
A description is given of a process for preparing aqueous copolymer dispersions by free-radical polymerization of ethylenically unsaturated monomers in an aqueous solution in which (a) from 10 to 90% by weight of at least one hydrophilic monomer A which has an N-vinyl group and whose polymerisation rate possesses a maximum at pH levels above 7, and (b) from 10 to 90% by weight of at least-one monoethylenically unsaturated hydrophobic monomer B whose polymerisation rate possesses a maximum at pH levels below 7, are copolymerised in the presence of a free-radical initiator system such that in the course of the polymerization the pH falls by from 2 to 5 units. The copolymer dispersions prepared in this way and the copolymers obtainable therefrom are suitable as auxiliaries for pharmaceutical, cosmetic or agrochemical formulations and for preparing paints, coating compositions, sizes, and adhesives.
摘要:
The invention relates to a pulverulent polymer composition comprisinga) a particulate mineral carrier of high specific surface area andb) a polymer dispersion applied to the carrier, andto a process for preparing this pulverulent polymer composition, to its use for preparing building materials, and to polymer-modified building materials, such as bitumen, dry mortars, powder adhesives, pulverulent coating formulations and filling compounds, all of which comprise such polymer compositions.