Dielectric composition for protective coating

FIELD: electronic engineering; gas panel manufacture.

SUBSTANCE: protective coating that can be used for manufacturing contact members of gas-panel strip conductors is formed on both sides of polyamide and applied by stenciling method using for the purpose dielectric composition resistant to 20-30% alkali solutions at temperature of 65 - 85oC that incorporates in its composition ethyl cellulose in the amount of maximum 9 parts by weight and organic solvent in the amount of minimum 91 parts by weight with boiling temperature of ≥ 190oC, minimal amount of ethyl cellulose and maximal amount of organic solvent being, respectively, 7.5 and 92.5 parts by weight.

EFFECT: improved rheological and protective properties of coating using proposed composition.

1 cl, 1 ex

 

The invention relates to the field of electronic technology and can be used in the manufacture of gas discharge display panels (GUI).

Known dielectric composition for protective coatings based cyklokapron - enamel K4-728, characterized by resistance to the action of dilute mineral and organic acids, alkalis, such as caustic soda, trisodium phosphate, ammonia solution [Mevlevis, Biesiadecki. Paint and varnish materials. M, Chemistry, 1982, page 247].

The lack of protective coatings based enamel K4-728 is instability in 20-30% solution of NaOH at a temperature of 75-80°and the high cost of cyclocarya.

Known dielectric composition for protective coatings based on PTFE - enamels and varnishes that can withstand prolonged exposure to 98% sulfuric and hydrochloric acids, 45% solution of alkali, hydrofluoric acid [Mevlevis, Biesiadecki. Paint and varnish materials. M, Chemistry, 1982, page 247].

The lack of protective coatings based on PTFE enamels and lacquers is a great length of time of drying the applied protective coatings (lacquer FP - 525 drying time is 1 hour at a temperature of 160°With up to 24 hours at a temperature of 18-22° (C)that lengthens the process and increases the cost of products.

Closest to the proposed invention is dial chechetka composition for the protective coating, including ethylcellulose not more than 9 parts and an organic solvent in an amount of not less than 91 parts in a mixture of organic solvents. This composition varnish EC-550 F. is designed to protect products from aluminum alloys chemical milling using a hot (t=75-80°C) and a 12% solution of alkali. The lacquer is applied to the product pneumatic spraying. [Mevlevis, Biesiadecki. Paint and varnish materials. M, Chemistry, 1982, page 298].

The disadvantage of the lacquer is long drying time of coatings formed from the varnish and the inability to use it for production in which the value vytravlivaetsya plots is 0,19-1 mm, because the distortion of the size of the plot because of odpilenia under the template or damage of the protective coating when removing the template after the formation of the protective coating, which leads to the corrosion products.

The objective of the invention is to provide a dielectric composition for a protective coating formed by the method of screen printing, sustainable solutions 20-30% alkali at t=65-85°C, used in the manufacture of the contact strip wires GUI.

This technical effect is achieved by the fact that in the known dielectric compositions for protective coatings, including ethylcellulose not more than 9 parts the organic solvent in an amount of not less than 91 parts, it contains as the organic solvent, the solvent having a boiling point ≥190°With a minimum amount of ethyl cellulose and the maximum amount of organic solvent respectively equal to 7.5 parts and of 92.5 parts

This dielectric composition allows forming method of screen printing a protective coating with discrete elements with high resolution that meets the requirements of the ISU, with dielectric composition has a high resistance to corrosive environments, such as 20-30%solution of alkali (KOH) at t=65-85°C.

The use of the above dielectric composition by formation of a protective coating screen printing allows you to automate the process of forming a protective coating.

Conducted by the applicant's analysis of the prior art, including searching by the patent and scientific and technical information sources, and identify sources that contain information about the equivalents of the claimed invention, allows to establish that the applicant is not detected similar, characterized by symptoms that are identical to the characteristics of the claimed invention, and the definition from the list of identified unique prototype, as the most similar set of features analogue, has identified a set of essential with respect to nativemenu by the applicant to the technical result of the distinctive features in the claimed object, set forth in the claims.

Therefore, the claimed invention meets the requirement of “novelty”.

To verify compliance of the claimed invention to the requirement of inventive step was conducted an additional search of the known solutions, in order to identify characteristics that match the distinctive features of the prototype of the characteristics of the claimed invention, the results of which show that the claimed invention is not necessary for the expert in the obvious way from the prior art, so as not detected dielectric composition for a protective coating formed by the method of screen printing, sustainable solutions 20-30% alkali at t=65-85°used for the manufacture of the contact strip wires GUI.

Thus, the claimed method of manufacturing a contact strip wires of the ISU meets the requirement of “inventive step”.

The dielectric composition used for forming the protective coating includes ethylcellulose with high chemical resistance, and an organic solvent with Kip t≥190°providing for the dissolution of ethyl cellulose and giving dielectric composition required rheological properties that allow you to use it for applying a protective coating by the method of screen PE the ATI in the formation of the contact strip wires GUI.

Dielectric composition for forming a protective coating is prepared as follows. Ethylcellulose in the amount of 7.5-9 parts and an organic solvent with Kip t≥190°With (for example, terpineol Kip t=219° (C) the number 91-92,5 parts mixed in glass or polyethylene containers. For dissolving ethyl cellulose and its uniform distribution in the volume of the mixture was kept in a water bath with constant stirring for 4 hours. The weight ratio of the components in the dielectric composition for the protective coating are selected in such a manner that a good protective properties of the coating, its integrity and rheological properties of the dielectric composition, and allowing its use in screen printing to form elements with a width of 0.2-0.3 mm

If the amount of ethyl cellulose in the dielectric composition is below 7.5 parts, the dielectric composition will spread out when forming the protective coating, which leads to a distortion of his image.

The increase in the content of ethyl cellulose in a protective composition above 9 parts leads to galenical composition and the formation of the protective coating defects (pores)that violates the integrity of the protective coating.

The dielectric composition as the organic solvent includes a solvent t Kip.≥ 190°C. the Application of the dielectric composition of an organic solvent with t Kip.<190°it leads to drying on the stencil during the printing process and, accordingly, to the distortion of the elements of the pattern formed on the surface of the dielectric tape wire.

The amount of organic solvent 91-92,5 parts is determined by the amount of the polymer component of the dielectric composition - ethylcellulose.

The organic solvent may include an organic pigment used in the dielectric composition to obtain a contrast coating for facilitating the control of the alignment holes in the protective coating wires with tape and the quality control application of the protective coating.

The study of the properties of the proposed dielectric composition was carried out during the formation of the protective coating in the process of obtaining the contact strip wires for the ISU AC information capacity of 256×320 color display elements. Tape the wire in increments of 0.84 mm, and the width of the wire of 0.25 mm was made from a sheet of polyimide foil dielectric by known techniques. For formation of the contact strip the wires on both surfaces of the dielectric through the stencil was applied protective coating in the form of a mask with rectangular holes and the locations of the contact strip wires at a distance of 1.5-3 mm from the edge of the dielectric. The width of the holes was 0.2 mm and the length is 2.5 mm Protective coating made from a dielectric composition of different formulations. When coating is carried out drying at a temperature of 120±10°C. the thus Prepared tape wire was placed in the etching solution for the decomposition of unprotected areas polyimide dielectric.

The composition of the solution: monoethanolamine - 350 g/l triethanolamine - 75 g/l, sodium hydroxide and 200 g/l water to 1 liter.

The temperature of the pickling solution is 65-85°With the time of etching of the dielectric - 5-15 minutes depending on the temperature and degree of elaboration of the solution. The destruction of the dielectric occurs on both surfaces of the tape wires in places open to the etching, the location of which corresponds to the location of the contact elements on the tape the wires. Upon completion of the etching tape the wires are washed in water to remove residual etching solution from the surface of the protective coating. Next, the protective coating is removed by a method of exfoliation.

The compositions of the dielectric composition used in the protective coating.

Example 1.

Ethylcellulose of 7.5 parts,

terpineol - of 92.5 parts

A protective coating formed on the basis of this dielectric composition, dense, without punctures; distortion of the picture when printing is not h is observed; the coating is resistant to the etching solution.

Example 2.

Ethylcellulose - 9 parts,

terpineol - 91 parts

The coating quality matches the quality of the coating in example 1.

Example 3.

Ethylcellulose - 10 parts,

terpineol - 90 parts

The dielectric composition has a pronounced galenically character. When the protective coating is formed pores; protective coating is uneven. When the etching in the areas of defects in the protective coating is etched insulator - tape output is not fit for further use.

Thus, the proposed dielectric composition resistant to the action of the pickling solution and allows you to create a screen printing protective cover with discrete elements with high resolution, used in the manufacture of the contact elements tape the wires to the ISU width of 0.2-0.3 mm in increments of location up 0,56 0,84 mm

Dielectric composition for protective coatings, including ethylcellulose not more than 9 parts and an organic solvent in an amount of not less than 91 parts, characterized in that it contains as the organic solvent, the solvent having a boiling point ≥190°With a minimum amount of ethyl cellulose and the maximum amount of organic solvent is equal to the COO is responsible to 7.5 parts and of 92.5 parts



 

Same patents:

FIELD: power supply cables.

SUBSTANCE: proposed cable that can be used to supply with power electrical loads and at the same time to transmit telephone, television, computer, and radio communication signals has one or more similar sections incorporating central flat current-carrying conductor disposed between two flat insulating tapes, the latter being disposed, in their turn, between two flat neutral conductors whose width is greater than that of current-carrying conductor by double thickness of insulating tape.

EFFECT: enhanced conductivity and enlarged functional capabilities of cable.

1 cl, 2 dwg

The invention relates to technology universal (multipurpose) electric cables for oil production that are used in conjunction with the equipment of oil and water wells to supply electric motors of submersible pumps, the limit of heating up of high-viscosity oil and gas mixture in the well, to prevent and eliminate parfenovitch tubes in the well, to the limit of heating up of pipelines, as well as the load-bearing cable

The invention relates to extruded cables, method of their production and harvesting, used for the manufacture of extruded cable this way
The invention relates to a cable technology, in particular to technology and devices for the manufacture of a ribbon (flat) cable

The invention relates to the field of electrical insulating equipment, in particular the silicone composition used in the electrical industry for the production of insulating materials and for impregnation of windings of electrical machines and apparatus

The invention relates to the field of electrical engineering, in particular to compositions based on ethylene-propylene rubber, used as maguilera placeholder in electric cables and wires

The invention relates to the field of electrical engineering, in particular to compositions for the manufacture of coatings for electrical steels for magnetic circuits of electrical machines and apparatus

The invention relates to the production of insulating coatings on electrical steel used in the magnetic circuits of electrical machines, apparatus and instruments

The invention relates to electrical engineering, in particular compositions for the manufacture of coatings for electrical steels for magnetic circuits of electrical machines and apparatus
The invention relates to electronic devices and can be used in the manufacture of gas discharge display panels

The invention relates to electrical engineering, and in particular to compositions for the manufacture of coatings for electrical steels for magnetic circuits of electrical machines and apparatus

The invention relates to electrical engineering, in particular compositions for the manufacture of coatings for electrical steels for magnetic circuits of electrical machines and apparatus

The invention relates to the production of insulating coatings on electrical steel used in the magnetic circuits of electrical machines, apparatus and instruments

FIELD: electronic engineering; gas panel manufacture.

SUBSTANCE: protective coating that can be used for manufacturing contact members of gas-panel strip conductors is formed on both sides of polyamide and applied by stenciling method using for the purpose dielectric composition resistant to 20-30% alkali solutions at temperature of 65 - 85oC that incorporates in its composition ethyl cellulose in the amount of maximum 9 parts by weight and organic solvent in the amount of minimum 91 parts by weight with boiling temperature of ≥ 190oC, minimal amount of ethyl cellulose and maximal amount of organic solvent being, respectively, 7.5 and 92.5 parts by weight.

EFFECT: improved rheological and protective properties of coating using proposed composition.

1 cl, 1 ex

FIELD: marking materials.

SUBSTANCE: invention relates to pigmentation and compositions for use in laser marking, in particular UV absorbing pigment at least partly covered with synergist having general formula [Rm(SiOn)]pR'q wherein m=1-3, n=1-3, p is a number equal to at least 1, q=0-3, and at least one of R or R' represents substituent. When pyrolized, pigment forms black material appropriate to form label. Such pigments are suitable for fluoropolymers serving to insulate wire conductors and cables.

EFFECT: expanded marking possibilities.

20 cl, 6 tbl, 38 ex

Insulating material // 2284593

FIELD: electrical engineering.

SUBSTANCE: proposed insulating material that can be effectively used to insulate conductors for various industries, including radio engineering, cable industry, microelectronics, and the like, has multilayer structure of N thin-film layers, where N > 1; all layers are made of separate piled films produced from same material and by same method, having actually equal thickness d < 25 μm.

EFFECT: facilitated manufacture, reduced cost of materials used, enhanced electric and mechanical strength.

1 cl, 1 dwg, 2 tbl

FIELD: electricity.

SUBSTANCE: invention is attributed to the field of electric engineering specifically to epoxide thin filling compounds used for electric insulating and reinforcing by means of embedding of high-voltage power supply units, transformers, electric circuitry, uncased and cased electric couplers, for sealing and protecting elements of radio-electronic devices against moisture and mechanical impacts. Composition for filling compound with moderate initial viscosity contains 30-36 wt-p. of epoxide diane resin, 12-20 wt-p. of threeglycid polyoxypropylene triol ether, 10-12 wt-p. of monoglycid n-butanol ether, 18-22 mass-p. of low-polymeric polyamid resin and 7-10 wt-p. of aliphatic amine.

EFFECT: creation of electric insulating filling compound composition keeping resiliency not less than for an hour, having high specific volume, high value of surface electric resistance and increased elasticity.

1 tbl

FIELD: chemistry.

SUBSTANCE: there is disclosed insulating coating composition, containing bitumen in amount 90-100 wt fractions, fluorocarbon polymer 32 LN in amount 10-15 wt fractions, butyl acetate in amount 40-45 wt fractions, acetone in amount 40-45 wt fractions and mica in amount 2-3 wt fractions.

EFFECT: improved insulating properties, mechanical strength and chemical stability.

1 tbl, 1 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a polyolefin composition with improved dielectric strength of insulation, to a wire or cable, in particular to a cable of middle, high or superhigh voltage, which includes such composition, as well as to application of such composition for production of wire or cable, in particular a cable of medium, high and superhigh voltage. Polyolefin composition contains polyolefin (A) and benzyl derivative (B) of a certain structure. Benzyl derivative (B) is used in the polyolefin composition as an additive for stabilisation of dielectric strength.

EFFECT: additive provides considerable improvement of dielectric strength, possesses good solubility in a polyolefin matrix and low predisposition to migration, and also possesses compatibility with respect to all other components of the polyolefin composition, in particular with cross-linking agents.

21 cl, 6 tbl, 5 ex

Up!