Anti-corrosion coatings


C09J179/04 - Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
C09D179/04 - Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors

FIELD: chemistry.

SUBSTANCE: described curable compositions comprise a polybenzoxazine component, a polyamine component, and a fluoropolymer component. The fluoropolymer component used is selected from fluoroolefin (co) polymers, perfluoroolefin (co) polymers, (co) polymers of perfluoroalkylvinylethers and (co) perfor alkoxyvinyl ether polymers.

EFFECT: invention provides protection against corrosion of substrates under the influence of high temperatures.

14 cl, 3 tbl, 3 ex

 



 

Same patents:

FIELD: chemistry.

SUBSTANCE: invention relates to composition for covering and solvent formulation. Composition of solvent for enamel for wires, based on polyvinylformal, consisting of ethanol, toluene and dimethylphthalate, and its application for dissolution of enamels for wires and impregnating varnishes. And composition of enamel for wires based on polyvinylformal, including said solvent formulation, method of its obtaining and application for production of winding wires.

EFFECT: invention provides composition of enamel for wires based on cresol-free polyvinylformal, without impairment of enamel working characteristics, as well as solvent, possessing low toxicity and high ability to dissolve coating materials.

5 cl, 6 ex

FIELD: chemistry.

SUBSTANCE: invention refers to pigment dispersion that can find application in electrophoretic displays. The dispersion contains α) a bis-(oxodihydroindolilene)benzodifuranone colouring agent of formula I wherein R1-R10 have values specified in cl.1, β) a special polymer dispersing agent containing modified poly(meth)acrylates, and γ) a solvent applicable for dispersions used in the electrophoretic displays. There are also described new colouring agents of bis-(oxodihydroindolilene)benzodifuranone compounds, dispersing agents and the electrophoretic display comprising these agents.

EFFECT: presented colouring agents have low conductivity and using them as black pigments in the electrophoretic displays enables reducing energy consumption as compared to using state-of-art carbon black.

11 cl, 1 dwg, 1 tbl, 11 ex

FIELD: process engineering.

SUBSTANCE: invention relates to removal of excess paint at spraying in painting chamber by separation fluid. Separation fluid contains the components that follow. (a) At least 49.95 wt % of water. (b) At least one non-ionic surfactant. (c) At least 5-50 wt % of organic water-soluble film stabilising component of monomer and polymer polyols. Components (b) and (c) differ. Separation fluid viscosity complies with DIN 53211 at 23°C to make 11-25 s. Proposed method comprises the steps that follow. i) Forcing the gas flow through painting chamber. ii) Bringing excess paint in contact with gas flow the make paint-saturated gas flow. iii) Making of continuous flow of fluid film of separation fluid on gas flow surface. iv) Forcing said gas flow saturated with paint to said surface with forming of first separation fluid saturated with paint. v) Removal of first separation fluid saturated with paint and gas flow with decreased content paint.

EFFECT: efficient removal of excess paint, stable process.

15 cl, 1 tbl, 1 ex

FIELD: chemistry.

SUBSTANCE: invention relates to water-dispersible polyurethane, method of obtaining thereof, thereof application and cosmetic preparation, containing polyurethane as thickening agent. Water-dispersible polyurethane contains mainly linear basic chains, consisting of alternating hydrophilic and hydrophobic sections. Polyurethane has two terminal sections (T), which are hydrophobic, and, at least, one hydrophobic terminal section (T) represents branched alkyl residue. Hydrophilic section (S) is directly attached to each section (T). At least, one hydrophobic section (D) is directly attached to, at least, one end of each of sections (S). The main polyurethane chain contains, at least, one hydrophilic section (P), and if there is more than one section (P), two sections (P) are separated with, at least, one hydrophobic section (D). Polyurethane contains, at least, three hydrophilic sections. Ratio of molecular weight of any of hydrophilic sections (S) to molecular weight of any of hydrophilic sections (P) lies within the interval from 1:1.4 to 1:70. At least, two hydrophobic sections (D) are aliphatic diisocyanate residues, and, at least, one hydrophilic section (P) represents residue of polyether with number average molecular weight, at least, 1500 g/mol. Polyurethane can represent mixture of different mentioned above polyurethanes. Polyurethanes are obtained in two steps. At the first stage interaction of, at least, one polyether diol with, at least, one aliphatic diisocyanate is realised in presence of zinc carboxylate in solvent medium. At the second stage obtained product is subjected to interaction with, at least, one ethoxylated aliphatic alcohol in solvent medium. After that, separation of solvents is performed and water is added. Polyurethanes are applied for manufacturing of water-containing cosmetic preparation.

EFFECT: invention makes it possible to increase viscosity of cosmetic preparations and their storage stability.

10 cl, 4 tbl, 11 ex

FIELD: chemistry.

SUBSTANCE: dispersant is a copolymer of (meth)acrylic acid with an alkyl oxide monomer, having a polymerisable functional group and terminated by a hydrogen atom or an alkyl group having 1-4 carbon atoms. The thickener is an associative thickener containing at least one hydrophobic group which is a polystyrylphenyl, preferably selected from distyrylphenyl, tristyrylphenyl and mixtures thereof. More preferably, the hydrophobic group is tristyrylphenyl.

EFFECT: dispersant-thickener combination enables to enhance gloss retention of a paint film over time, while providing the aqueous composition with the required rheological properties.

28 cl, 2 tbl, 18 ex

FIELD: printing.

SUBSTANCE: invention discloses a counterfeit-proof document, in which at least on one area, which is visible from the side surface, at least two different paints are applied. The said paints along the marked direction on the area have concentration curves differing from each other, so that the ratio (R(x)) of the concentrations of at least two different paints varies on the area depending on the location along the marked direction, with at least two different paints are fluorescent paints. The concentration curves are chosen so that at the excitation of fluorescence the area which leads to the appearance of the marked colour print is distinguishable; and at least two different paints have different durability. In addition, the concentration curves and the area size along the marked direction are chosen so that, after manufacturing after a preliminary determined period of validity a distinguishable shift is formed which leads to the appearance of colour print of the area.

EFFECT: invention provides increased protection against forgery of the document, and the simplicity of checking the attribute of authenticity.

35 cl, 12 dwg, 3 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a paint composition containing a hydrophobic latex polymer component for endowing resistance to softening by water and staining of the paint film obtained from the latex paint produced from the paint composition, as well as paint, a paint film and production method thereof.

EFFECT: invention enables to obtain a latex paint film and a latex paint, which are not sensitive to water, staining, deterioration of lustre and change in rheological properties.

11 cl, 7 ex

FIELD: chemistry.

SUBSTANCE: present invention relates to copolymer surfactants and use thereof in emulsion paints. The paint composition for colouring emulsion paints contains at least one pigment, water and a copolymer surfactant. The copolymer surfactant has average molecular weight between 400 and 200000 Da and contains the following monomers: (a) 10-80 wt % of at least one compound selected from α,β-ethylene unsaturated C3-C12 carboxylic acids or anhydride thereof, (b) 10-80 wt % of at least one α,β-ethylene unsaturated C2-C12 vinyl monomer and (c) 0.01-20 wt % of at least one surfactant. Each of the said monomers is either an acrylic or methacrylic ester with an ethoxylated fragment, having the following structure: H2C=C(X)-C(O)O-E-R, where X denotes hydrogen or methyl, E denotes ethoxylate and R denotes alkyl phenyl, monostyrene phenyl, distyrene phenyl or tristyrene phenyl. When added to a water emulsion paint, the dye composition does not lead to change in viscosity for low Stormer shearing force in a water emulsion paint obtained from a mixture containing the said dye composition, by more than approximately ±10% of the viscosity for low Stormer shearing force of the acrylic base from which the paint was prepared. The dye composition also contains at least one oxygen-containing solvent, antifoaming agent, preservative and sodium hydroxide. Described also is a water emulsion paint which is prepared from a mixture of the base of the paint and the dye composition containing at least one pigment, water and the said copolymer surfactant. The paint also contains an associative thickener which is a non-ionic hydrophobically modified ethylene oxide urethane block copolymer, hydrophobically modified polyether, hydrophobically modified alkali-soluble emulsion, hydrophobically modified poly(meth)acrylic acid, hydrophobically modified hydroxyl ethyl cellulose, hydrophobically modified poly(acrylamide) or mixture thereof.

EFFECT: paint has good fluidity properties/levelling capacity, does not change colour after rubbing.

27 cl, 9 tbl, 15 ex, 1 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to a synthetic thickener used in compositions for making paints. The synthetic thickener contains a water-soluble or water-swellable synthetic polymer whose main chain contains terminal and/or intermediate blocks of oligomeric hydrophobic fragments. The hydrophobic fragments are selected from a group which includes alkyl or aryl fragments which contain a polymerising cyclic monomer or mixture thereof. The monomer is selected from a group which includes alkyl glycidyl ethers, aryl glycidyl ethers, alkyl epoxy and mixtures thereof. Alternatively, hydrophobic fragments are selected from a group which includes polymerising alkene or mixture thereof and derivatives thereof. The polymerising alkene monomer is selected from a group which includes styrene and styrene compounds. The main chain of the water-soluble or water-swellable synthetic polymer is selected from a group which includes polyethylene glycol, polyacetal polyethers and polyurethane. The synthetic thickener can be used as a modifier of rheological characteristics, especially in latex paints.

EFFECT: use of the synthetic thickener in water-based coatings ensures good thickening, levelling and insignificant drips.

5 cl, 23 ex, 4 tbl

FIELD: dyes.

SUBSTANCE: invention relates to stable mixtures comprising filling agents and condensing agents chosen in the indicated combinations and concentrations. These stable mixtures can be used as mixtures in a method for preparing dyes by using dye precursors or as a component in the covering material such as a dye, or for another final aim wherein pigments conferring the paints covering power are used.

EFFECT: improved and valuable properties of mixtures.

13 cl

FIELD: chemistry.

SUBSTANCE: invention relates to chemical industry and concerns a method for producing an additive in the form of hard fibres, wherein the said additive is storage stable and based on the eco-friendly polyamide acid; the said additive in a salt state can be used for the production of composite materials and metal coatings. The method for polyamide acid salt production comprises forming a polyamide acid fibre cocoon by mixing 13.0-13.5 wt % polyamide acid solution in dimethylformamide with distilled water while stirring at the rate of 50 rev/min. The obtained cocoon is washed with distilled water, and separated into individual fibres to dry in the air and then at 120-130°C for 60 min in a cabinet drier, in a vacuum thermostat at 79-81°C and a pressure of 1 atm. to reduce dimethylformamide content down to 3.68 wt %, followed by dissolving the fibres in a mixture of N-methylpyrrolidone, monoethanolamine and water to obtain the said salt. A method for producing coatings based on fluoropolymers with polyamide acid salt or polyamide acid-based lacquer.is also disclosed.

EFFECT: storage stable polyamide acid in the form of fibres, improved quality of polyamide acid and composite materials based on fluoropolymers and polyamide acid, improved antiadhesive and antifriction coatings.

3 cl, 2 tbl, 2 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a thermally reversible hot-melt adhesive which is isocyanate-free. The thermally reversible hot-melt adhesive contains at least one multifunctional diene monomer/prepolymer L-(X)P and at least one multifunctional dienophile monomer/prepolymer L-(Y)q, where at least one or P and Q is greater than 2.1. The thermally reversible composition can also be used as a priming coat.

EFFECT: thermally reversible hot-melt adhesive can be repeatedly heated and cooled without deterioration of performance characteristics of the adhesive.

20 cl, 4 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to a moisture-curable resin based on aliphatic isocyanates. The moisture-curable resin contains a material with aliphatic isocyanate functional groups, which contains a reaction product of hexamethylene diisocyanate and a hydroxy-functional ether compound, and a material with cycloaliphatic isocyanate functional groups, which contains a reaction product of isophorone diisocyanate and a monofunctional alcohol, wherein the weight ratio of the material with cycloaliphatic isocyanate functional groups to the material with aliphatic isocyanate functional groups ranges from 95:5 to 50:50. A method of improving cold lap resistance, bubbling resistance and weather resistance of the coating composition which contains said moisture-curable resin includes a step of preparing a composition which does not exhibit significant cold lap when deposited with thickness of the moist film of at least 6 mil, and where the coating composition does not exhibit bubbling during curing to thickness of the dry film of at least 6 mil.

EFFECT: invention improves cold lap resistance and bubbling resistance of the coating composition and improves film-forming and coating properties of the resin.

19 cl, 7 dwg, 16 tbl, 14 ex

FIELD: chemistry.

SUBSTANCE: invention relates to surface coatings with anti-icing properties, moulded articles and devices having said coating, methods of producing and using said coatings, moulded components and devices. The coating contains a matrix and an active polymer incorporated into said matrix, wherein said active polymer consists of certain structural links and is covalently bonded to the matrix, selected from a group consisting of sol-gel and polymer layers.

EFFECT: said coatings have excellent anti-icing properties.

15 cl, 2 dwg, 11 tbl

FIELD: chemistry.

SUBSTANCE: disclosed is a method of applying a coating on a substrate. The method includes applying a primer composition on part of the substrate. The primer contains a self-emulsifying polyester microgel.

EFFECT: invention provides a coating with good adhesion.

11 cl, 14 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a method of electroplating a substrate that has not undergone pretreatment. The method includes (a) contacting at least part of substrate material with a solution containing a copper source and water, where the solution is substantially free of a group IIIB metal source and a group IVB metal source, (b) bringing at least part of the substrate into contact with an electroplating composition containing (i) a film-forming resin and (ii) a yttrium source. Also described is a coated substrate and a method of electroplating a substrate, which includes (a) contacting at least part of substrate material with a solution containing a copper source, water and at least one substance selected from acids and surfactants, followed by contacting at least part of the substrate with an electroplating composition.

EFFECT: corrosion resistance of the substrate material without a compulsory pretreatment step.

20 cl, 9 tbl, 10 ex

FIELD: physics, optics.

SUBSTANCE: invention relates to the system of sunlight reflecting coatings. The system of coatings comprises two layers of coatings. The layer of the first coating a) has CIELAB L* value no more than 40 and includes: i) film-forming resin and ii) the pigment absorbing visible radiation and transparent for infrared radiation. The layer of the second coating b) is applied below, at least, a part of a layer of the first coating and includes: i) film-forming resin; ii) the pigment of thin scales of metal or alloy of metal reflecting the infrared radiation, and iii) the pigment absorbing visible radiation and transparent for infrared radiation. The layer of the first coating and the layer of the second coating has contrast ration (L*second/L*first) from 0.8:1 up to 1.6:1. The system of coatings has % of the full solar reflection (FSR) of, at least, 25%, and the layer of the second coating has % FSR of, at least, 25%.

EFFECT: invention allows to create the system of sunlight reflecting coatings.

16 cl, 7 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to protective coatings. Composition of protective coating includes acryl resin, reactionable polyorganosiloxane or its initial reagent, hexamethyldisiloxane and system of solvents.

EFFECT: invention provides preservation of external looks of coloured surfaces after durative influence of weather conditions, as well as at regular cleaning and washing, in particular leaves "water spots" invisible.

25 cl, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to composition for coating of different substrates, including metal substrates of packing products, for example, containers for food products or drinks, and method of obtaining such packing products. Product contains: metal substrate of container for food products or drinks or its parts and coating, applied on, at least, part of metal substrate surface, with coating containing: film-forming quantity of polyether polymer, which has one or more segments of the following formula I: -O-Ar-(Rn-Ar)n-O-, where each Ar independently represents phenylene group, each n independently stands for 0 or 1, R, if present, represents bivalent organic group, which has molecular weight lower than 500 and two atoms of oxygen, each represents ether oxygen, with temperature of glass transition (Tg) constitutes at least 70°C, with composition for coating is, at least, in fact, free from bisphenol A and diglycidyl ether of bisphenol A, and polyether polymer is product of reaction ingredients, which include polyepoxide and polyatomic phenol.

EFFECT: invention makes it possible to obtain coating with stability against albication, corrosion, stability to etching, and high adhesion to metal substrate.

24 cl, 4 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to obtaining protective coatings resistant to aggressive media with improved deactivating ability, intended for application in chemical, petroleum refining industry. Composition contains polyfluorinated copolymer of vinylidenefluoride, hexafluoropropylene and allylfluorosulphate, eposy diane resin, solvent, filling agent and hardening agent. As filling agent composition contains substances, selected from the group, including soot, fluoroplast, aerosil or their mixtures.

EFFECT: claimed polymer composition is hardened at room temperature, possesses high resistance to aggressive media and improved deactivating ability, as well as high adhesive and physical-mechanical properties.

4 cl, 3 tbl, 5 ex

FIELD: chemistry.

SUBSTANCE: invention relates to chemical industry and concerns a method for producing an additive in the form of hard fibres, wherein the said additive is storage stable and based on the eco-friendly polyamide acid; the said additive in a salt state can be used for the production of composite materials and metal coatings. The method for polyamide acid salt production comprises forming a polyamide acid fibre cocoon by mixing 13.0-13.5 wt % polyamide acid solution in dimethylformamide with distilled water while stirring at the rate of 50 rev/min. The obtained cocoon is washed with distilled water, and separated into individual fibres to dry in the air and then at 120-130°C for 60 min in a cabinet drier, in a vacuum thermostat at 79-81°C and a pressure of 1 atm. to reduce dimethylformamide content down to 3.68 wt %, followed by dissolving the fibres in a mixture of N-methylpyrrolidone, monoethanolamine and water to obtain the said salt. A method for producing coatings based on fluoropolymers with polyamide acid salt or polyamide acid-based lacquer.is also disclosed.

EFFECT: storage stable polyamide acid in the form of fibres, improved quality of polyamide acid and composite materials based on fluoropolymers and polyamide acid, improved antiadhesive and antifriction coatings.

3 cl, 2 tbl, 2 ex

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