Wire enamel having high adhesion to electric wires

FIELD: chemistry.

SUBSTANCE: invention can be used in producing wires with enamel insulation for motors, coils and transformers. The wire enamel contains binder, an organic solvent, auxiliary substances and additives, an adhesion promoter selected from imidazole, pyrrolidone, amidocarboxylic acids, derivatives thereof and mixtures thereof. The method of coating electric wires with the enamel involves providing an electric wire, applying the enamel and curing.

EFFECT: improved adhesion of the enamel to electric wires.

20 cl, 9 ex

 

The real formula of invention application has a priority of DE 102007047492.1-43. The priority document is incorporated by reference in full.

All documents cited in this application are incorporated by reference.

The present invention relates to enamels for wires that have high and wear resistant adhesion to the electric wire.

The present invention also relates to a method for coating wires by curing of the enamels of the invention.

The present invention also relates to the use of thermosetting enamels of the invention for coating electric wires.

The level of technology

Polyurethanes as insulating coating materials based on hydroxyl-containing polyesters and block isocyanates and adducts of isocyanates are known in large numbers and are described for example in DE 1957157 and DE 10051392 A1. Combination of one or more hydroxyl-containing polyesters having in General the number HE 200-900 mg KOH/g, preferably 250-750 mg KOH/g, and one or more block adducts of isocyanates, as applied for based on polyurethane enamel wire, also known and described, for example, in DE 2840352 A1 or DE 2545912 A1.

The coating materials of the wires on the basis of polyester resins are known, for example, from US 3,342,780, US 3,249,578, EP 0144281 A1 and WO 93/12188 is 1.

Polyetherimide enamel is known, for example, from DE 1445263 and DE 1495100 and WO 91/07469 A1. Given their good mechanical, thermal and chemical properties, they are widely used in industry for the production of enamel wire.

Modern production of motors, coils and transformers imposes stringent requirements on the technological properties of the wire with enamel insulation. Components are reduced and become more complex. During the processing of the wire enamel insulation is increasingly stretched, compressed and twisted than ever. During processing also wire with enamel insulation is subjected to vibration and tensile strength. To the wire with enamel insulation resisted this process, it is mandatory high adhesion of the coating to copper, even after wear. The state of the prior art is the use of adhesion promoters, such as dicyandiamide (curing agent of epoxy resins), in enamels for the wires. This leads to improved adhesion in the new wire with enamel insulation, but after wear adhesion is lost almost completely.

Problem

The problem solved by this invention was to develop an enamel wire, which are distinguished by good and wear resistant adhesion to electric wires, specifically copper.

Solution

This problem is solved by using enamels DL the wires, including:

A) 20-60 wt.% at least one binder,

B) 40-80 wt.% at least one solvent,

C) 0-5 wt.%, preferably 0.01-5 wt.% auxiliary substances and additives,

D) 0.01-5 wt.% the adhesion promoter.

Definitions of terms

For the purposes of the present invention, the terms "wire with enamel insulation and enamel wires for both and all their possible forms of declinations cases, are synonymous.

In the context of the present invention all specify the amount, unless otherwise indicated, shall be understood as weights.

Unless otherwise indicated, all of the above reactions or phase of the method carried out under standard pressure (atmospheric pressure).

Detailed description

Enamel wire of the present invention include:

A) 20-60 wt.% in terms of the total weight of the enamel wire, at least one binder,

B) 40-80 wt.% in terms of the total weight of the enamel wire, at least one organic solvent,

C) 0-5 wt.%, preferably 0.01 - 5 wt.% in terms of the total weight of the enamel wire, auxiliary substances and additives,

D) 0.01-5 wt.% in terms of the total weight of the enamel wire, adhesion promoter.

Enamel wire of the invention can take the form of one-component (1K) system or a two-component (2K) systems.

In case 1, the system adhesion promoters D) may be present

i) in the form of independent connections or

ii) is condensed with a binder.

In accordance with the invention, it is preferable that the adhesion promoters are present in the form of independent connections, in other words not condensed with a binder.

If 2K system adhesion promoters D) are present in the second component and the second component may

i) to be added to the first component prior to application, or

ii) to be applied to the electric wire before the first component in the form of the first covering layer.

In one possible implementation of the enamel wire consist of components A), b) and D).

Binder (A) comprises polyurethane, polyester or polyetherimide connecting wire enamels for, the quality, the appropriate level of technology.

Examples of the polyurethane binder enamels for wires that may be applied, such as described in DE 1957157, DE 10051392 A1, DE 2840352 A1 or DE 2545912 A1.

Examples of the polyester resin enamels for wires that may be applied, such as described in US 3,342,780, US 3,249,578, EP 0144281 A1 and WO 93/12188 A1.

Examples polyetherimide binder enamels for wires that may be applied, such as described in DE 1445263, DE 1495100 and WO 91/07469 A1.

Organic solvents are usually used as component b) in the context of nastojasih the invention.

Suitable organic solvents) are common solvents enamels for the wires. They can be phenol, Cresols, xylenols, as well as their technical isomer mixtures, esters of glycol, dimethylglycine, ethylglycol, isopropylparaben, butylparaben, metildigoxin, ethyldiglycol, butyldiglycol, phenylglycol, glycol ether esters, such as methylsiliconate, atilglukuronida, butylglycol and methoxypropylacetate, for example, cyclic carbonates, polypropenkarbonat, for example cyclic ethers, gamma-butyrolactone, and dimethyl formamide, N,N-dimethylacetamide and N-methyl-pyrrolidone. In addition, it is also possible the use of aromatic and aliphatic alcohols and esters and phthalates, such as dimethylphthalate and methylbenzoate, benzyl alcohol, n-butanol, isobutyl alcohol, optionally in combination with established of solvents. And also ketones, such as cyclohexanone and isophorone.

Some organic solvents) can be partially replaced with thinners. Preferably or use clean solvent or pure mixture of solvents, or solvents to 40 wt.% in terms of total weight of diluents. Examples of suitable solvents are xylene, solvent-naphtha, toluene, ethylbenzene, cumene, naphtha, various products SolvesoŽ, ShellsolŽ, and DeasolŽ.

Excipients and zabawkami C) (also referred to below as "adjuvants") can be any components that are known to the specialist in the art and are conventional in the technology of enamels for the wires.

Examples include improving the flow of phenolic or melamine resin or other conventional agents, flow control, based on, for example, polyacrylates and polysiloxanes, as well as catalysts. Additional examples are catalysts, such as ORGANOMETALLIC compounds such as the metals magnesium, aluminum, tin, graphite, zinc, iron, titanium, bismuth, antimony and zirconium, and also tertiary amines.

The number of auxiliary substances and additives in enamels for the wires of the invention may vary within prescribed limits and is determined initially by their function. Specialist in the art and therefore is able to easily determine the appropriate amount of adjuvant in each case on the basis of his or her knowledge of the prior art, if necessary, using simple experiments that define the range. In addition to these auxiliary substances and additives specialist in the art well knows more such substances and their inclusion in the component (C)covered by this invention.

Suitable adhesion promoters D) include the imidazole and its derivatives, pyrrolidone and its derivatives, and amidocarbonyl acid and its derivatives, and mixtures of these compounds.

Suddenly, in the context of the present invention it has become possible to obtain particularly good effect of the use of derivatives, imidazole derivatives, pyrrolidone and derivatives amidocarbonyl acids as promoters of adhesion D).

Particularly suitable derivatives of imidazole and derivatives of pyrrolidone include the following:

vinylimidazole, vinyl pyrrolidone, homopolymers and copolymers of these vinyl compounds in all proportions, for copolymers it is possible that they are block copolymers or irregular, syndiotactic or stereoregular copolymers.

Particular preference is given in accordance with the invention vinylimidazole and/or copolymer of vinylimidazole-methanol (50:50).

Derivatives amidocarbonyl acid, which can be applied in accordance with the invention, are obtained from polycarboxylic acids and amines and their derivatives. Carboxylic acids and their derivatives, which can be used are aliphatic, cycloaliphatic and aromatic polycarboxylic acids and their derivatives, such as phthalic acid, phthalic anhydride, pyromellitic dianhydride and trimellitic anhydride, naphthalene tetracarbonyl dianhydride or dianhydro the s tetracosanoic acids, containing two benzene rings in the molecule, where the carboxyl group are in the 3,3',4 - and 4'-positions, and their free acids. In the case of polycarboxylic acids having a functionality of more than 2, the remaining acid functions can be esterified with alcohols or processed by other agents.

Suitable amines include aliphatic, cycloaliphatic and aromatic primary and secondary amines, preferably secondary amines, such as, for example, diethanolamine, pyrrole, pyrrolidine, piperidine, thiazole, tetrazole, indoles, morpholines, aziridine, athetini, imidazoles, pyrazoles, pyridone and piperazines.

When used polycarboxylic acid having a functionality of more than 2, first of all carry out the reaction of these acid groups. In the case of esterification used polycarboxylic acid and an alcohol, such as monophenyl glycol, for example, condensed in vacuum at a temperature of 150-250°C, depending on the components, until will not work theoretical amount of distillate. In the second stage is the reaction of accession with the amine, the amine is added slowly due to the high ekzotermicheskie reaction. After the reaction of deriving amidocarbonyl acid product can be dissolved and diluted using conventional solvents is La enamels for the wires.

Particular preference is given to amidocarbonyl acid of the following formula:

For the adhesion promoter may be allowed by reaction with a binder enamel to the wire, or it can be added as adjuvant to enamel at a concentration of 0.01-5 wt.%, preferably 0.1-3 wt.%, in terms of solid fraction or the fraction of binder in the enamel wire. In another embodiment, can be applied to the connection imidazole/pyrrolidone and/or derived amidocarbonyl acid, in solution in the usual solvents enamel wire, at a concentration of 5-80 wt.%, preferably 20-60 wt.%, as the primary coating of the wire. Further, the enamel wire emilyrose next layer.

An additional object of the present invention is the use of compounds identified as component D) as adhesion promoters, more particularly derivatives, imidazole derivatives, pyrrolidone and derivatives amidocarbonyl acid, most preferably of vinylimidazole and/or copolymer of vinylimidazole-methanol (50:50), for enamels for the wires in the form

i) additives

ii) is condensed with a binder, or

iii) in the form of primary coatings applied before the enamel wire.

Various embodiments of the present invention, examples that characterize different for isinya claims can be combined with each other in any desirable way.

The invention is now illustrated with reference to the following non-limiting examples.

Examples

The adhesion promoters of the invention were tested in the following enamels for wires ELANTAS GmbH: WE 1332/31 (polyurethane enamel wire hardness of 31%, a viscosity of 60-100 MPa at 23°C and thermal index (TI) 155), WE 1598/35 (polyetherimide enamel wire hardness of 35%, a viscosity of 140-220 MPaˇs at 23°C and T 180).

Conditions of enameling:

Temperature:500-550°C
System nanesenia:jets
Wire diameter:0.8 mm
The number of passes:11
Magnification:50-60 microns

Wire with enamel insulation have been tested in accordance with IEC 851. The adhesion properties were determined using samples from peeling and measuring flexibility (rasstegivaemoy, zakruchivaete). Test for exfoliation and the definition of flexibility was performed immediately after enameling and again after aging, i.e. after storage wire with enamel, isolatie is at the proper TI wire with enamel insulation for hours.

Example 1: Getting amidocarbonyl acid

Standard 2.5 l reactor flask with flat butt joints and the crystallizer condensate supplied, whilst stirring and passing nitrogen, the following Monomeric polyester building blocks: 280 g monophenyl glycol and 384 g trimellitic anhydride. Components of the reaction was slowly heated to a temperature of 220°C and kept at 200-230°C for 1 h the Mixture was then slowly heated to 220-250°C and placed in a vacuum. The condensation is carried out until then, until it is received at least 90% of theoretical amount of distillate. The download was cooled to 80-95°C in vacuum, the vacuum was stravovali using nitrogen. Then, from a dropping funnel in the load measured on 180 g of the research, the rate of addition was caused by the exothermic heating. After completion of addition, stirring was continued for 0.5 h at a temperature of 100-140°C. the Load was diluted using 540 g of cresol and 270 g of solvent-naphtha and thoroughly stirred for 4 h, the Product has a viscosity of 1400 MPaˇs (23°C) and hardness 56.8% (1 g/1 h/180°C).

Example 2: Obtaining enamel wire of the invention 1

2500 g of polyurethane enamel to the wire, WE 1332/31 with a hardness of 31% was mixed with 14 g amidocarbonyl acid of Example 1 (corresponding to 1% in terms of solid portion) and the mixture is then stirred for an hour. D. the more enamel wire was emalirovki in direct comparison with polyurethane enamel to the wire, WE 1332/31 without amidocarbonyl acid and subjected to testing. With polyurethane enamel to the wire, WE 1332/31 without amidocarbonyl acid is achieved 115 circuits in the sample to flaking and flexibility 10% before curing, and circuits 115 and flexibility 0% after aging. Adding 1% amidocarbonyl acid in polyurethane enamel to the wire, WE 1332/31 leads to 165 circuits in the sample to flaking and flexibility 15% before curing, and circuits 180 and flexibility 15% after aging. Changes in thermal, electrical or other mechanical properties was not.

Example 3: Obtaining enamel wire of the invention 2

2500 g of polyurethane enamel to the wire, WE 1332/31 with a hardness of 31% was mixed with 15 g of a 25% solution of a copolymer of vinylimidazole-methanol (50:50) cresol (corresponding to 0.5% in terms of solid portion) and the mixture is then stirred for an hour. Further, the enamel wire was emalirovki in direct comparison with polyurethane enamel to the wire, WE 1332/31 without copolymer of vinylimidazole-vinylpyrrolidone (50/50) and subjected to testing. With polyurethane enamel to the wire, WE 1332/31 without copolymer of vinylimidazole-vinylpyrrolidone (50/50) is achieved 115 circuits in the sample to flaking and flexibility 10% before curing, and circuits 115 and flexibility 0% after aging. Adding 0.5% of a copolymer of vinylimidazole-vinylpyrrolidone (50/50) in polio Lanovoy enamel to the wire, WE 1332/31 leads to 200 circuits in the sample to flaking and flexibility 15% before curing, and circuits 250 and flexibility 10% after aging. Changes in thermal, electrical or other mechanical properties was not.

Example 4: Obtaining enamel wire of the invention 3

2500 g of polyurethane enamel to the wire, WE 1332/31 with a hardness of 31% was mixed with 6 g of a 25% solution of vinylimidazole in cresol (corresponding to 0.2% in terms of solid portion) and the mixture is then stirred for an hour. Further, the enamel wire was emalirovki in direct comparison with polyurethane enamel to the wire, WE 1332/31 without vinylimidazole and subjected to testing. With polyurethane enamel to the wire, WE 1332/31 without vinylimidazole achieved 115 circuits in the sample to flaking and flexibility 10% before curing, and circuits 115 and flexibility 0% after aging. Adding 0.2% of vinylimidazole in polyurethane enamel to the wire, WE 1332/31 leads to 240 circuits in the sample to flaking and flexibility 20% before curing, and circuits 270 and flexibility 10% after aging. Changes in thermal, electrical or other mechanical properties was not.

Example 5: Receiving enamel wire of the invention 4

2500 g polyetherimides enamel to the wire, WE 1598/35 with a hardness of 35% was mixed with 15 g amidocarbonyl acid from Example 1 (corresponding to 1% in terms of solid portion) and the mixture is then stirred at p is ateenyi hours. Further, the enamel wire was emalirovki in direct comparison with polyetherimides enamel to the wire, WE 1598/35 without amidocarbonyl acid and subjected to testing. With polyetherimides enamel to the wire, WE 1598/35 without amidocarbonyl acid is achieved 165 circuits in the sample to flaking and flexibility 30% before curing, and circuits 170 and flexibility 10% after aging. Adding 1% amidocarbonyl acid in polyetherimide enamel to the wire, WE 1598/35 leads to 190 circuits in the sample to flaking and flexibility 30% before curing, and circuits 230 and flexibility 20% after aging. Changes in thermal, electrical or other mechanical properties was not.

Example 6: Getting enamel wire of the invention 5

2500 g polyetherimides enamel to the wire, WE 1598/35 with a hardness of 35% was mixed with 35 g of a 25% solution of a copolymer of vinylimidazole-vinylpyrrolidone (50/50) cresol (corresponding to 1% in terms of solid portion) and the mixture is then stirred for an hour. Further, the enamel wire was emalirovki in direct comparison with polyetherimides enamel to the wire, WE 1598/35 without copolymer of vinylimidazole-vinylpyrrolidone (50/50) and subjected to testing. With polyetherimides enamel to the wire, WE 1598/35 without copolymer of vinylimidazole-vinylpyrrolidone (50/50) is 165 circuits in the e to flaking and flexibility 30% before curing, and circuits 170 and flexibility 10% after aging. Adding 1% of a copolymer of vinylimidazole-vinylpyrrolidone (50/50) in polyetherimide enamel to the wire, WE 1598/35 leads to 185 circuits in the sample to flaking and flexibility 30% before curing, and 240 circuits and flexibility 25% after aging. Changes in thermal, electrical or other mechanical properties was not.

Example 7: Getting enamel wire of the invention 6

2500 g polyetherimides enamel to the wire, WE 1598/35 with a hardness of 35% was mixed with 19 g of a 25% solution of vinylimidazole in cresol (corresponding to 0.5% in terms of solid portion) and the mixture is then stirred for an hour. Further, the enamel wire was emalirovki in direct comparison with polyetherimides enamel to the wire, WE 1598/35 without vinylimidazole and subjected to testing. With polyetherimides enamel to the wire, WE 1598/35 without vinylimidazole achieved 165 circuits in the sample to flaking and flexibility 30% before curing, and circuits 170 and flexibility 10% after aging. The addition of 0.5% of vinylimidazole in polyetherimide enamel to the wire, WE 1598/35 leads to 180 circuits in the sample to flaking and flexibility 30% before curing, and 235 circuits and flexibility 15% after aging. Changes in thermal, electrical or other mechanical properties was not.

PR is measures 8: Getting enamel wire of the invention 7

2500 g of polyester enamel wire Terebec SL225Ž hardness of 40% was mixed with 17 g amidocarbonyl acid from Example 1 (corresponding to 1% in terms of solid portion) and the mixture is then stirred for an hour. Further, the enamel wire cover (6 passes) polyamidimide covering enamel wire Allotherm 602LŽ hardness of 35% (4 passes) and tested in direct comparison with polyester enamel wire Terebec SL225Ž and polyamidimide covering enamel wire Allotherm 602LŽ without amidocarbonyl acid and subjected to testing. System enamel wire without amidocarbonyl acid is achieved 170 circuits in the sample to flaking and flexibility 25% before curing, and circuits 170 and flexibility 25% after aging. Adding 1% amidocarbonyl acid in the polyester-polyamidimide system enamel wire leads to 190 circuits in the sample to flaking and flexibility 25% before curing, and circuits 210 and flexibility 25% after aging. Changes in thermal, electrical or other mechanical properties was not.

Example 9: the comparative example

2500 g polyetherimides enamel to the wire, WE 1598/35 with a hardness of 35% was mixed with 9 g of dicyandiamide (corresponding to 1% in terms of solid portion) and the mixture is then stirred for an hour. Further, the enamel DL the wires were emalirovki in direct comparison with polyetherimides enamel to the wire, WE 1598/35 without dicyandiamide and subjected to testing. With polyetherimides enamel to the wire, WE 1598/35 without dicyandiamide is achieved 165 circuits in the sample to flaking and flexibility 30% before curing, and circuits 170 and flexibility 10% after aging. Adding 1% of dicyandiamide in polyetherimide enamel to the wire, WE 1598/35 leads to circuits 230 in the sample to flaking and flexibility 30% before curing, and 0 circuits and flexibility 0% after aging. Adhesion was completely lost.

1. Enamel wire containing:
A) 20-60 wt.% in terms of the total weight of the enamel wire, at least one binder,
B) 40-80 wt.% in terms of the total weight of the enamel wire, at least one organic solvent,
C) 0-5 wt.% in terms of the total weight of the enamel wire, auxiliary substances and additives,
D) 0.01 to 5 wt.% in terms of the total weight of the enamel wire, adhesion promoter selected from the group comprising imidazole, pyrrolidone, amidocarbonyl acid, derivatives thereof and mixtures thereof, the total amount of the components is 100 wt.%.

2. Enamel wire according to claim 1, characterized in that it contains
C) 0.01 to 5 wt.% in terms of the total weight of the enamel wire, auxiliary substances and additives.

3. Enamel wire according to claim 1 or 2, characterized in that it is in the form of one-component (1K) system.

4. The enamel wire is about to claim 1 or 2, characterized in that it is in the form of two-component (2K) systems.

5. Enamel wire according to claim 4, wherein the first component includes or consists of components A), b) and C) and the second component 2K system includes or consists of component D).

6. Enamel wire according to claim 5, wherein the second component further includes
A') at least one binder,
In') at least one organic solvent,
(C) auxiliary substances and additives.

7. Enamel wire according to claim 6, in which
A)+A') together constitute the amount of 20-60 wt.%,
In)+In') together constitute the number of 40-80 wt.%
C)+C') together constitute the amount of 0-5 wt.%.

8. Enamel wire according to claim 1 or 2, characterized in that the binder (A) is selected from the group including polyurethane, polyester and polyetherimide enamel wire and mixtures thereof.

9. Enamel wire according to claim 1 or 2, characterized in that the organic solvent is chosen from the group including cresol, solvent-naphtha and mixtures thereof.

10. Enamel wire according to claim 1 or 2, characterized in that the auxiliary substances and additives C) selected from the group comprising phenolic resin, melamine resin, agents, flow control, catalysts, amines and mixtures thereof.

11. Enamel wire according to claim 1 or 2, characterized in that the applied adhesion promoters p is establet a vinylimidazole and/or copolymer of vinylimidazole-vinylpyrrolidone 50:50.

12. Method of coating electrical wires, characterized in that
a) provide an electric wire,
b) of the enamel wire according to any one of claims 1 to 11 on the power cord and
C) enamel wire utverjdayut.

13. The method according to item 12, characterized in that
B1) put the second component containing component D),
B2) causing the first component containing the components a), b) and C), or a method of applying a wet layer or after pre-curing or light distillate fractions under vacuum, the second component containing the component (D), on the second component.

14. The method according to item 12 or 13, characterized in that the electric wire is selected from the group comprising silver, gold, copper or alloys of these metals.

15. The method according to 14, characterized in that the electric wire is copper.

16. The application of the enamel wire according to any one of claims 1 to 11 for coating electric wires, specifically wire with enamel insulation.

17. The application of clause 16, wherein the wire with enamel insulation are part of motors, coils and transformers.

18. The application of item 16 or 17, characterized in that the electric wire is selected from the group comprising silver, gold, copper or alloys of these metals, specifically copper.

19. The use of certain compounds as the component is D) as adhesion promoters for enamel wire, in the form
i) additives
ii) is condensed with a binder or
iii) as a primary coating that is applied before the enamel
wires.

20. The application of claim 19, characterized in that as component (D) used imidazole, pyrrolidone and derivatives amidocarbonyl acid, most preferably vinylimidazole and/or copolymer of vinylimidazole-vinylpyrrolidone 50:50.



 

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15 cl, 20 dwg, 4 tbl, 4 ex

FIELD: chemistry.

SUBSTANCE: invention relates to use of nanomaterials in wire enamel for improving thermal properties of enamel. The nanomodified wire enamels are usually used in making insulated winding wire. The polymer base of wire enamel is selected from a group comprising polyamideimide, polyester, polyesterimide, polyurethane and mixtures thereof. The nanomaterial is selected from a group comprising nano-oxides, metal nano-oxides, metal oxides or hydroxides of aluminium, tin, born, germanium, gallium, lead, transition metals, lanthanides, actinides and mixtures thereof. The nanomaterial is also selected from a group comprising nano-oxides, metal nano-oxides, metal oxides and hydroxides of aluminium, silicon, titanium, zinc, yttrium, vanadium, zirconium, nickel and mixtures thereof. After applying enamel on the wire and curing thereof, the wire exhibits improved thermal and mechanical properties.

EFFECT: improved thermal properties of enamel.

8 cl, 6 tbl

FIELD: chemistry.

SUBSTANCE: disclosed is a method of producing a dispersion of silicon dioxide particles with a modified surface, having mean diameter of not more than 100 nm, via high-pressure grinding of a pre-dispersion containing a) 10-50 wt % silicon dioxide particles with a modified surface, b) at least one glycol monoether of general formula H3C(CH2)m-O-(CH2)n-[O-(CH2)o]p-OH (A), c) at least one carboxylic ester of general formula H2x+1Cx-O-CH2-(CHR)-[O-CHR]y-O-C(=O)-CzH2z+1 (B), where the molar ratio A/B ranges from 10:90 to 40:60 and m, n, o, p, x, y and z do not depend on each other. Also disclosed is a dispersion obtained using the disclosed method, a method of producing granules of silicon dioxide particles with a modified surface by separating the liquid phase of the dispersion, granules obtained using the disclosed method and use of the dispersion and granules in coating materials.

EFFECT: disclosed dispersion and particles can be used in transparent coating compositions.

10 cl, 2 tbl, 6 ex

FIELD: chemistry.

SUBSTANCE: invention relates to use of cyclohexane dicarboxylic acid diesters, wherein ester groups contain residues selected from a group of branched and straight substituted and unsubstituted alkyl residues, for producing coating materials for the method of coating roll or sheet metallic materials. The coating method is realised by continuously depositing onto one or both sides of a tape at least one fluid coating material and then thermally treating the layers. The coating material contains at least one said cyclohexane dicarboxylic acid diester, at least one paste-like polyvinyl chloride with mean grain diameter of 1-15 mcm and at least one extender polyvinyl chloride with mean grain diameter of 25-35 mcm. The invention also relates to production of three-dimensional moulded articles from the coated roll or sheet material, obtained by moulding from this material.

EFFECT: coated sheets, as well as their coating have improved weather resistance, particularly resistance to UV radiation.

21 cl, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to a resin paint composition for high internal permeability cationic electrodeposition and can be used as a primer coat. The composition contains a basic resin which contains products of reaction of polysulphide compounds with epoxy compounds and products of reaction of amine compounds and epoxy compounds; a resin curing agent which contains products of reaction of modified polyol compounds; aromatic sulphonic acid; and a substance which provides rheologic properties, containing a urethane functional group.

EFFECT: composition has high stability of aqueous dispersion, coating uniformity, antibacterial properties, plasticity and anticorrosion properties.

8 cl, 11 tbl

FIELD: chemistry.

SUBSTANCE: formulation composition contains: A) 5-95 wt % at least one radiation-curable resin, B) 5-25 wt % silicic acid, C) 0.1-10 wt % at least one adhesion promoter, D) 5-90 wt % at least one radiation-curable reactive diluent, E) 0.5-5 wt % at least one dispersant. The adhesion promoter is selected form phosphoric acid and/or phosphonic acid and/or products of reaction thereof with functionalised acrylates. The composition can additionally contain photoinitiators, pigments and additives, selected from diffusion promoting agents, delustering agents and degassing agents. The compositions are used as a primer, an intermediate layer, coating varnish and/or clear varnish, as well as for making coatings via a coil coating technique.

EFFECT: coatings have flexibility, thereby providing excellent protection of metal substrates from corrosion.

18 cl, 2 tbl, 6 ex

FIELD: chemistry.

SUBSTANCE: additives are used in compositions which are applied on transparent panel bases, e.g., used in windows. The coating composition additive contains an agent for improving functioning of the coating composition, containing a Michael reaction siloxane product, also containing one or more active hydrogen-containing functional radicals with two or more acrylate groups and a compound containing an acid radical which is a carboxylic acid. The invention also relates to an article obtained using the following method. The base-coating method involves mixing the coating composition with said additive, depositing the mixture onto the base and adhesion of the deposited mixture. The invention relates to a coating composition which contains a resin selected from epoxy, acrylic, polyurethane or any combination thereof, a dye and said additive.

EFFECT: articles with the coating composition are characterised by prolonged use.

9 cl, 5 tbl

Pigment dispersion // 2455326

FIELD: chemistry.

SUBSTANCE: described is a method of producing an essentially aqueous pigment dispersion which is essentially free from organic binder and dispersions obtained using said method. The method involves mixing a water-soluble or water-dispersable silane compound and particles of colloidal silicon dioxide with weight ratio of silane to silicon dioxide from 0.25 to 1.5 to form particles of silanised colloidal silicon dioxide in an aqueous dispersion. Said particles of colloidal silicon dioxide are further mixed with an organic and/or inorganic pigment with weight ratio of silicon dioxide to pigment from about 0.001 to about 0.8, to form said essentially aqueous pigment dispersion. Described also is use of the disclosed pigment dispersion when applying coatings and for reducing formation of bubbles on non-absorbent substrates.

EFFECT: disclosed pigment dispersion has high resistance to flocculation and high stability over time.

20 cl, 5 tbl, 13 ex

FIELD: chemistry.

SUBSTANCE: described are novel benzotriazole UV-absorbers, having absorption spectrum shifted towards the long-wave side with considerable absorption in the region up to 410-420 nm, having general formulae (a)-(k) (structural formula and values of radicals are given in the description), composition which is stabilised with respect to UV radiation and containing novel UV-absorbers, and use of the novel compounds as UV light stabilisers for organic materials.

EFFECT: obtaining novel benzotriazole UV-absorbers, having absorption spectrum shifted towards the long-wave side.

13 cl, 23 ex, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to use of nanomaterials in wire enamel for improving thermal properties of enamel. The nanomodified wire enamels are usually used in making insulated winding wire. The polymer base of wire enamel is selected from a group comprising polyamideimide, polyester, polyesterimide, polyurethane and mixtures thereof. The nanomaterial is selected from a group comprising nano-oxides, metal nano-oxides, metal oxides or hydroxides of aluminium, tin, born, germanium, gallium, lead, transition metals, lanthanides, actinides and mixtures thereof. The nanomaterial is also selected from a group comprising nano-oxides, metal nano-oxides, metal oxides and hydroxides of aluminium, silicon, titanium, zinc, yttrium, vanadium, zirconium, nickel and mixtures thereof. After applying enamel on the wire and curing thereof, the wire exhibits improved thermal and mechanical properties.

EFFECT: improved thermal properties of enamel.

8 cl, 6 tbl

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