Sodium salt of a copolymer of acentrella and maleic anhydride as a substance exhibiting ion-exchange properties
(57) Abstract:Usage: the synthesis of copolymers of nitroethylene and maleic anhydride and their sodium salts, which can be used in the chemical industry as substances exhibiting ion-exchange properties. The inventive copolymer structure specified in the description, with a molecular mass of 78000-100000, where n = 390-500. table 1. The invention relates to the chemistry of the modified polymers, specifically to a new sodium salt of a copolymer of acentrella and maleic anhydride (SPAN-MA), and can be used in the chemical industry, including for the separation of mixtures of metal ions, as well as for deposition and codeposition of metals.Known industrial carboxyl ion type KB  however, they have low exchange capacity and, in addition, act as ion exchangers mostly in a series of alkaline earth metals.The closest achieved the effect are the nitro-derivatives of chlorinated atactic polypropylene (APH) and polyvinyl chloride (PVC) 
The ion-exchangers based on APH and PVC have a wider scope in contrast to ion-type KB and proaza not high enough.The aim of the present invention to provide a new ion exchanger with high exchange capacity.This objective is achieved in that the ion exchanger with improved characteristics selectivity is proposed to use a modified sodium nitrite is a copolymer of vinyl chloride and maleic anhydride (SPWH-MA) in the form of its sodium salt, having the structure
< / BR>where n 390-500, MM 78000-100000
Full sodium salt SPAN-MA contain in the structure of the carboxyl groups
as an industrial ion type KB and nitro nitro-derivatives as APH and PVC. The set of features is the structure of the ion exchanger provides greater selectivity, however, the mutual influence of carboxy - and itinirary, as well as the influence of molecular weight is not obvious.The proposed ion exchanger is produced by interaction SPWH-MA NaNO2in dimethylformamide (DMF), maintaining the mixture from 6 h up to 40 minutes at a temperature of 70-100oC followed by treatment with an aqueous solution of alkali within 12 hours the product Yield of 83% of the nitrogen content of nitro groups 4-7 wt.Example 1. In a round bottom flask with reflux condenser are placed 10 g SPWH-MA (mol. m shivani 40 min at 90oC. the Solution is cooled and poured into 15 ml of 4 and NaOH solution and leave in the cold for 12 hours. The precipitation is separated, dried in vacuumsealed Cabinet. The product, sodium salt of a copolymer of acentrella and maleic anhydride brown, soluble in water, acetone and other solvents. Exit 83%
Changing the temperature and duration of nitration leads to a final product with different molecular weight. Thus, carrying out the reaction at 60oC for 6 h with subsequent transfer to the sodium salt allows to obtain a product with MM 78000. Synthesis at 100°C for 1 h gives the product MM 100000.The structure of the final product was identified by IR spectroscopy, elemental analysis, potentiometric titration. The molecular weight of the methods of high-speed sedimentation and gel chromatography.In the IR spectra of sodium salt SPAN-MA. there is a new band 1620 cm-1that answersVal.C=N aciniform. At the same time in the 1700-1800 cm-1noVal.C=O present in the IR spectra of the copolymer of nitroethylene and maleic anhydride, which means that the NaOH reacts not only with nitrogroup, but with anhydrite ring with the formation of groups-C00<'s who I am. Depending on the synthesis conditions, it is 4.5-7% compared to data from elemental analysis allowed to determine the ratio of:
< / BR>where the content of nitrogen in NO2groups, Ntotal- the content of total nitrogen.With increasing amount of nitrogen in the molecule increases total capacity calculated by potentiometric titration curve.The average molecular mass was measured on an analytical ultracentrifuge model 3180 method of high-speed sedimentation, as well as by gel-chromatography. The convergence results are satisfactory.Determination of exchange capacity of metals held complexometric titration by Trilon B (Zn++, Mg++), and (Cu++, Fe+++Nd++Er+++) on the photocolorimeter using the calibration curves. The table shows some values exchange capacity. Sodium salt of a copolymer of acentrella and maleic anhydride patterns
< / BR>with mol. m 78000 100000,
where n 390 500,
as a substance exhibiting ion-exchange properties.
SUBSTANCE: method is described for preparing aqueous solutions of copolymers, involving a fundamental step for copolymerisation of partially neutralised acrylic and maleic acid in the presence of hydrogen peroxide in amount of 2 to 4% of total mass of monomers at temperature ranging from 85 to 105°C in an aqueous medium, which is realised through gradual addition of an aqueous solution of hydrogen peroxide for 3 to 6 hours into an aqueous solution of partially neutralised maleic acid and simultaneous gradual addition of an aqueous solution of partially neutralised acrylic acid, or an aqueous solution of free acrylic acid, or aqueous solutions of free acrylic acid and a base, and subsequent addition of hydrogen peroxide for 30 to 60 minutes after completion of simultaneous addition of hydrogen peroxide and acrylic acid, and a step for pre-polymerisation by keeping the reaction mixture at polymerisation temperature, distinguished by that, the pre-polymerisation step is realised by keeping the reaction mixture at polymerisation temperature for 35 to 60 minutes, subsequent simultaneous addition of aluminium or potassium persulphate in amount ranging from 0.10 to 0.15% of total mass of monomers and subsequent keeping at polymerisation temperature for 45 to 90 minutes.
EFFECT: increased dispersion capacity of copolymers.
1 cl, 1 tbl, 8 ex
SUBSTANCE: flocculant has the following composition, wt %: partial magnesium salt of a copolymer of acrylic and methacrylic acid neutralised by 60% (with ratio of monomers: acrylic acid - 45%, and methacrylic acid - 55%) 2.4-3.5; sodium salt of a copolymer of acrylic and methacrylic acid (with ratio of monomers: acrylic acid - 35%, and methacrylic acid 65%) 3.8-5.8; polyacrylamide 1.1-1.5; water - the balance. The flocculant is used in form of process solutions with concentration 0.015-0.035 wt %. 0.035% aqueous flocculant solutions have the highest flocculating power.
EFFECT: flocculant has high solubility in water and ensures high efficiency when used to clarify waste water.
SUBSTANCE: invention relates to emulsifying polymers and use of these polymers for stable emulsification of hydrophobic additives in aqueous concrete plasticisers. Disclosed is a polymer P, obtained via copolymerisation (a) of at least one ethylenically unsaturated monomer A selected from a group consisting of unsaturated mono- and dicarboxylic acids, sulphonic acids, phosphonic acids in form of free acids or salts or partial salts or halide or anhydride, with (b) at least one ethylenically unsaturated monomer B of formula ,
where radicals and coefficients are as described in the claim and (c) with at least one ethylenically unsaturated monomer C of formula
where radicals and coefficients are as described in the claim and with (d) at least one ethylenically unsaturated monomer D of formula
where radicals and coefficients are as described in the claim and optionally (e) with at least one basic ethylenically unsaturated monomer E of formula ,
where radicals and coefficients are as described in the claim and optionally (f) with at least one other ethylenically unsaturated monomer W. Use of the polymer as a plasticiser for water-curable compositions and a water-curable composition are also disclosed.
EFFECT: polymer improves quality of mortar.
19 cl, 5 tbl
SUBSTANCE: group of inventions relates to curable water-based composition for obtaining coating on non-woven material, method of manufacturing treated non-woven material, treated with curable water-based composition, and non-woven material, treated with composition. Composition includes copolymer and cross-linking agent. As copolymerised units aid copolymer contains from 1 to 10 wt %, counted per dry weight, of itaconic acid copolymer and from 90 to 99 wt % of copolymerised ethylene-unsaturated monomer, selected from the group, including ethylacrylate, butylacrylate, styrene, methylmethacrylate, acrylic acid, methacrylic acid, acrylonitrile and their mixtures. Cross-linking agent has at least two hydrazine groups, with molar ratio of hydrazine group in cross-linking agent to carboxyl group in copolymer constituting from 0.05 to 2. Water-based composition is cured at temperature from 100°C to 250°C.
EFFECT: high tensile strength in dry, wet and submerged into isopropyl alcohol state.
6 cl, 13 tbl, 19 ex
SUBSTANCE: invention relates to methods of producing raw maleic anhydride. In particular, method includes steps where: reactor output stream, containing maleic anhydride, is fed into bottom part of absorption column, where it comes into contact with a non-cyclic solvent, that is fed close to its upper part and is a diester, having a boiling point under normal conditions between 250 °C and 350 °C, solubility of fumaric acid at least 0.06 wt% at temperature of 60 °C, solubility of maleic anhydride at least 10 wt% at temperature of 60 °C, water solubility not higher than 100 mg/l, density, different from water density at least to 0.020 g/ml, and a water-soluble hydrolysis product with molecular weight not higher than that of pentanol, with transfer of maleic anhydride of outlet stream of reactor into a solvent, wherein gas stream to be extracted is blown off from absorption column, and enriched solvent, containing maleic anhydride, is removed from absorption column near bottom of absorber and directed into flash tower near its middle part, untreated maleic anhydride is removed from stripping column near its middle or upper part.
EFFECT: methods make it possible to use cheaper solvent than phthalates.
11 cl, 1 dwg, 1 tbl
FIELD: organic chemistry, chemical technology, polymers.
SUBSTANCE: invention describes a method for preparing water-soluble copolymers and homopolymers of vinylamine by radical (co)polymerization of vinyl formamide as a monomer comprising vinylamine with protecting formyl group. Method is carried out in aqueous, alcoholic or aqueous-alcoholic solution in the concentration of monomer 10-50 wt.-% in the presence of 0.1-2.0 wt.-% of ammonia (of the total mass of monomer). Protecting formyl group is removed at heating the prepared (co)polymer in aqueous or aqueous-alcoholic solution of strong inorganic acid in the concentration of acid 0.12-30 wt.-% and in the molar ratio acid : monomer link of vinyl formamide = (0.1-5.0):1. Invention provides preparing (co)polymers of vinylamine with regular structure in the broad range of molecular masses and high yield.
EFFECT: improved preparing method.
1 tbl, 9 ex
FIELD: paper-and-pulp industry.
SUBSTANCE: process comprises manufacturing sized paper in presence of sizing substance and water-soluble amphoteric promoter resin, which is obtained via polymerization of a monomer including at least one polymerizable cationic amine monomer and at least one polymerizable organic acid and wherein molar percentage of cationic amine constitutes at least 25% of monomers in amphoteric promoter resin and molar percentage of organic acid units constitutes at least 25% of monomers in amphoteric promoter resin, while whiteness loss is below 0.5 TAPPI units as compared to whiteness of composition obtained without promoter resin.
EFFECT: improved sizing characteristics due to optical bleacher added and with excellent preservation of whiteness.
3 cl, 12 dwg, 2 tbl, 19 ex
SUBSTANCE: present invention pertains to antistatic media, which prevent accumulation of static electricity, arising on the surface of textile materials, carpets, on artificial and natural fur. The aim of the invention is to develop a method of obtaining antistatic media, which allows for increasing antistatic effect, increase thermal stability and moisture resistance. Proposal is given of a method of obtaining an antistatic medium through radical co-polymerisation of N,N-dimethyl-N,N-diallylammonium chloride and methacrylic methylester in a period of 6-10 hours at 40-60°C in mass ratio of co-monomers N,N-dimethyl-N,N-diallylammonium chloride and methacrylic methylester of 1:0.005-3.0, with addition of ammonium persulphate in its mass ratio to the mixture of co-monomers N,N-dimethyl-N,N-diallylammonium chloride and methacrylic methylester of 1:250-2000 with subsequent addition of dimethyl sulfoxide in quantity, 3.4 times more than the total mass of N,N-dimethyl-N,N-diallylammonium chloride, methacrylic methylester and ammonium persulphate. Compared to the prototype, antistatic effect increases 3-5 fold, thermal stability and moisture resistance increase 5-11 fold.
EFFECT: development of a method of obtaining antistatic media, which allows for increasing antistatic effect, increase thermal stability and moisture resistance.
1 cl, 1 tbl, 4 ex
SUBSTANCE: invention concerns antistatic media preventing static electricity accumulation on the surface of textile, carpets, artificial and natural furs. Invention claims method of obtaining antistatic medium by radical copolymerisation of N,N-dimethyl-N,N-diallylammonium chloride and metacrylic acid for 6-10 hours at 40-60°C at 1:0.005-2.0 weight ratio of N,N- dimethyl-N,N-diallylammonium chloride to methacrylic acid, in the presence of ammonium persulfate at its weight ratio to dimethyl-N,N-diallylammonium chloride and metacrylic acid comonomers equal to 1:250-2000, with further addition of water in amount exceeding total mass quantity of dimethyl-N,N-diallylammonium chloride, metacrylic acid and ammonium persulfate by 0.8 times. Antistatic effect increases in 2-3 times in comparison to the prototype, while heat and water resistance increases in 8-12 times.
EFFECT: obtaining antistatic medium enhancing quality of target product due to enhanced antistatic effect and heat and water resistance.
1 cl, 1 tbl, 4 ex
SUBSTANCE: there is disclosed water-soluble cation-active powdered polymer composition contains, at least, two cationic polymers of different molecular weight. The first cationic polymer consists of component monomers by radical polymerisation in aqueous solution with the second cationic polymer added whereat cation link types of the first and second polymers are matched. The first cationic polymer is a copolymer of cationic and nonionic monomers. Apparent molecular weight of the first cationic polymer is more than 1 million. The first cationic polymer is polymerised in aqueous solution of the second cationic polymer by adiabatic gel polymerisation method. Ratio of the second cationic polymer to the first cationic polymer is 0.01:10 to 1:3. Besides, there is described method of making these polymer compositions and their application as a flocculating additive for solid substance/liquid isolation.
EFFECT: developed effective method of producing water-soluble cationic polymer composition.
15 cl, 20 ex, 1 tbl
SUBSTANCE: there is disclosed water-soluble powdered cation-agent polymer compound containing at least two cationic polymers differing by cationic types with the first cationic polymer made of composing monomers by radical polymerisation in aqueous solution with the second cationic polymer added. The first cationic polymer is polymerised in an aqueous solution of the second cationic polymer by adiabatic gels-polymerisation. Ratio of the second cationic polymer to the first cationic polymer is 0.01:10 to 1:4. Additionally there is disclosed method of producing this polymeric compound applied as an auxiliary flocculative agent in solid/liquid separation.
EFFECT: extended application of the compound.
22 cl, 28 ex, 6 tbl
SUBSTANCE: invention relates to compound of cyclometalated platinum (II) complex - (2-phenylpyridinato-N,C2')(1-phenyl-3-methyl-4-(5-bicyclo[2.2.1]hept-5-en-2-yl)-5-pyrazolonato-O,O) platinum (II) of formula 1
Also claimed are based on it copolymers and organic light-emitting diode. Invention makes it possible to obtain compound of cyclometalated platinum (II) complex, on whose basis obtained are copolymers, which can be applied for creation of emission layer in organic light-emitting diodes.
EFFECT: method improvement.
5 cl, 1 dwg, 3 tbl, 5 ex
SUBSTANCE: present invention relates to a method of producing polymers by radical precipitation polymerisation: a) 99.99-10 wt % of at least one α,β-ethylenically unsaturated compound with at least one cationogenic and/or cationic group in the molecule, wherein a) is selected from vinyl imidazoles of general formula (III) in which residues R1-R3 denote hydrogen, an alkyl with 1-4 carbon atoms or a phenyl, b) from 0 to less than 25 wt % of at least one monoethylenically unsaturated compound, different from component a) and having amide groups, which is selected from a group comprising amide group-containing α,β-ethylenically unsaturated compounds of general formula (IV): in which R2 denotes a group of formula CH2=CH-, and R1 and R3 together with an amide group with which they are bonded form a lactam with 5 ring atoms, c) 0.01-5 wt % of a cross-linking agent, d) 0-15 wt % of at least one monoethylenically unsaturated compound selected from alkyl(meth)acrylates with 12-30 carbon atoms in the alkyl, e) 0-30 wt % methyl methacrylate, under the condition that the total amount of components a) - e) is equal to 100 wt %, characterised by that realisation thereof involves use of at least two different water-insoluble initiators A and B, which are selected such that the breakdown temperature of each is at least 70°C and said temperature values differ from each other by at least 10°C. Also described is use of at least one polymer obtained using said method to modify rheology of aqueous, alcohol or water-alcohol compositions. Described also is a cosmetic or pharmaceutical agent which contains at least one polymer obtained using said method.
EFFECT: obtaining polymers having optimum consumer properties and a thickening effect at the same time.
12 cl, 1 tbl, 16 ex
FIELD: pharmaceutical chemistry.
SUBSTANCE: invention provides water-soluble camptotecine derivatives showing excellent therapeutical activity and retarded release suitable for cancer chemotherapy. High-molecular weight camptotecine derivative has structure wherein carboxylic acid group of block copolymer of polyethylene glycol and polymer containing carboxylic acid group in side chain and being acidic amino acid polymer is linked to phenol hydroxyl group of phenolic camptotecines through ester linkage. Also claimed is high-molecular weight camptotecine derivative of general formula (I): . Preparation method comprises combining carboxylic acid group of above-defined block copolymer with phenol hydroxyl group of phenolic camptotecines through ester linkage in presence of condensation agent. Anticancer drug includes above-defined camptotecine derivative and optionally pharmaceutically acceptable carrier.
EFFECT: augmented choice of anticancer drugs.
9 cl, 2 dwg, 2 tbl, 5 ex