Method of producing high-molecular polymer poly-n-vinylcaprolactam in water

FIELD: chemistry.

SUBSTANCE: present invention relates to a method of producing high-molecular weight poly-N-vinylcaprolactam. Described is a method of producing high-molecular weight poly-N-vinylcaprolactam by radical polymerisation of vinyl caprolactam in presence of azo-isobutyric acid at reaction temperature 70C in water, characterised by that method includes adding to reaction system an activator in form of styrene in concentration 0.610-2-1.210-2 mol/l.

EFFECT: technical result is simplified process of producing high-molecular weight poly-N-vinylcaprolactam.

1 cl, 3 dwg, 1 tbl, 1 ex

 



 

Same patents:

FIELD: chemistry.

SUBSTANCE: invention relates to ionogenic water soluble polyelectrolytes of a diallyl origin, in particular to poly-N,N-diallylvaline of formula

given below, where n=100-112.

EFFECT: polymer possesses high complex-forming properties, a regulated acid-base and hydrophilic-hydrophobic balance and can be applied as a flocculent, coagulant, structurator of soils, prolonger of medications.

2 tbl, 1 dwg, 3 ex

FIELD: chemistry.

SUBSTANCE: invention relates to an ionic water-soluble polyelectrolyte - poly-N,N-diallyl leucine, which can be used as flocculants, coagulants, soil structuring agents and medicinal agent prolonging agents. The poly-N,N-diallyl leucine has the following formula: where n=100-112.

EFFECT: invention enables to obtain a polyelectrolyte with high molecular weight, having improved complexing properties, the molecules of which contain both negatively charged and positively charged functional groups, with a controlled acid-base and hydrophilic-hydrophobic balance.

1 dwg, 2 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: invention relates to ionogenic water-soluble diallyl polymers of formula: , where n=100-112. The polymer is obtained in aqueous solution by via radical polymerisation of N,N-diallyl aspartic acid in the presence of an ammonium persulphate (APS) radical initiator at sufficiently mild conditions.

EFFECT: improved complexing properties of the polymer with respect to iron, copper and cobalt cations, and obtaining a polymer with controlled acid-base and hydrophilic-hydrophobic balance.

1 cl, 1 dwg, 3 tbl, 4 ex

FIELD: chemistry.

SUBSTANCE: invention concerns hydrophilic adhesive polymers obtained by covalent or non-covalent linking, namely hydrogel and bioadhesive compositions incorporating one or more water-insoluble hydrophilic adhesive polymers, and applications of the said compositions in therapeutics, such as drug deliver systems, e.g. local, trasdermal, transmucous, iontophoretic, medical skin covering, wound healing bandages and biomedical electrodes, as well as cosmetic applications, such as tooth-whitening products. This task is accomplished by development of water-insoluble linked hydrophilic polymer obtained by polymerisation of composition of hydrophilic monomer and double-functionality monomer which both undergoes polymerisation with hydrophilic monomer as (a) and provides covalent links as (b) in the polymer where double-functionality monomer is a poly(alkylenoxide) molecule containing ca. 4-40 alkylenoxide units and substituted at each end by a reactive group liable to vinyl polymerisation.

EFFECT: development of molecular construction process for obtaining new hydrophilic glues.

86 cl, 17 tbl, 15 ex, 25 dwg

The invention relates to the production of water-soluble high molecular weight cationic polyelectrolytes used in the pulp and paper industry for paper production, to accelerate the processes of sedimentation and filtration of suspensions in the treatment of industrial circulating water and wastewater

FIELD: chemistry.

SUBSTANCE: invention concerns hydrophilic adhesive polymers obtained by covalent or non-covalent linking, namely hydrogel and bioadhesive compositions incorporating one or more water-insoluble hydrophilic adhesive polymers, and applications of the said compositions in therapeutics, such as drug deliver systems, e.g. local, trasdermal, transmucous, iontophoretic, medical skin covering, wound healing bandages and biomedical electrodes, as well as cosmetic applications, such as tooth-whitening products. This task is accomplished by development of water-insoluble linked hydrophilic polymer obtained by polymerisation of composition of hydrophilic monomer and double-functionality monomer which both undergoes polymerisation with hydrophilic monomer as (a) and provides covalent links as (b) in the polymer where double-functionality monomer is a poly(alkylenoxide) molecule containing ca. 4-40 alkylenoxide units and substituted at each end by a reactive group liable to vinyl polymerisation.

EFFECT: development of molecular construction process for obtaining new hydrophilic glues.

86 cl, 17 tbl, 15 ex, 25 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to ionogenic water-soluble diallyl polymers of formula: , where n=100-112. The polymer is obtained in aqueous solution by via radical polymerisation of N,N-diallyl aspartic acid in the presence of an ammonium persulphate (APS) radical initiator at sufficiently mild conditions.

EFFECT: improved complexing properties of the polymer with respect to iron, copper and cobalt cations, and obtaining a polymer with controlled acid-base and hydrophilic-hydrophobic balance.

1 cl, 1 dwg, 3 tbl, 4 ex

FIELD: chemistry.

SUBSTANCE: invention relates to an ionic water-soluble polyelectrolyte - poly-N,N-diallyl leucine, which can be used as flocculants, coagulants, soil structuring agents and medicinal agent prolonging agents. The poly-N,N-diallyl leucine has the following formula: where n=100-112.

EFFECT: invention enables to obtain a polyelectrolyte with high molecular weight, having improved complexing properties, the molecules of which contain both negatively charged and positively charged functional groups, with a controlled acid-base and hydrophilic-hydrophobic balance.

1 dwg, 2 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: invention relates to ionogenic water soluble polyelectrolytes of a diallyl origin, in particular to poly-N,N-diallylvaline of formula

given below, where n=100-112.

EFFECT: polymer possesses high complex-forming properties, a regulated acid-base and hydrophilic-hydrophobic balance and can be applied as a flocculent, coagulant, structurator of soils, prolonger of medications.

2 tbl, 1 dwg, 3 ex

FIELD: chemistry.

SUBSTANCE: method includes preparing a solution of a hydrophobically modified polyacrylamide with molecular weight of 300000-1500000, adding N-vinylcaprolactam and N,N-methylene-bis-acrylamide in toluene, and then dispersing with a mechanical mixer at a rate of 200-300 rpm or an ultrasonic disperser, wherein polymerisation is carried out in the presence of sodium persulphate for 5-6 hours, and the obtained aqueous dispersion is dialysed to pH 6.0-6.5.

EFFECT: method significantly cuts the duration of the process and virtually eliminates linear poly-N-vinylcaprolactam impurities completely.

4 ex

FIELD: chemistry.

SUBSTANCE: present invention relates to a method of producing high-molecular weight poly-N-vinylcaprolactam. Described is a method of producing high-molecular weight poly-N-vinylcaprolactam by radical polymerisation of vinyl caprolactam in presence of azo-isobutyric acid at reaction temperature 70C in water, characterised by that method includes adding to reaction system an activator in form of styrene in concentration 0.610-2-1.210-2 mol/l.

EFFECT: technical result is simplified process of producing high-molecular weight poly-N-vinylcaprolactam.

1 cl, 3 dwg, 1 tbl, 1 ex

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