CN115595055A - Conductive polyurethane coating, conductive film and preparation method of conductive polyurethane coating - Google Patents
Conductive polyurethane coating, conductive film and preparation method of conductive polyurethane coating Download PDFInfo
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- CN115595055A CN115595055A CN202211335551.4A CN202211335551A CN115595055A CN 115595055 A CN115595055 A CN 115595055A CN 202211335551 A CN202211335551 A CN 202211335551A CN 115595055 A CN115595055 A CN 115595055A
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- polyurethane coating
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- conductive polyurethane
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/0427—Coating with only one layer of a composition containing a polymer binder
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/044—Forming conductive coatings; Forming coatings having anti-static properties
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/24—Electrically-conducting paints
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2475/04—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/001—Conductive additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
Abstract
The invention provides a conductive polyurethane coating, a conductive film and a preparation method of the conductive polyurethane coating, wherein the conductive polyurethane coating comprises 53.5-72.5% of waterborne polyurethane serving as a carrier, 8-13% of nano flat spherical metal powder, 9-15% of deionized water and 0.1-0.3% of wetting agent. The conductive polyurethane coating has fine granularity and good dispersibility of the conductor material, and the conductive film prepared by the conductive coating has better volume resistance, surface resistance and tensile breaking strength.
Description
Technical Field
The invention relates to a conductive polyurethane coating, a conductive film and a preparation method of the conductive polyurethane coating.
Background
The conductive coating has conductive performance and the function of eliminating static charge, is widely applied to various fields of electronic products and the like, and can be coated on a substrate film to prepare a conductive film. Conductive materials or conductive agents are generally used in the conductive paint, and the conductive materials comprise carbon fillers such as graphite powder and metal powder, but the granularity of the conductive materials is not fine enough, the dispersibility is poor, the mass ratio of the components of the conductive paint also influences the performance of the conductive paint and the conductive film, and the conductive film with the same thickness has different performances such as volume resistance, surface resistance, tensile breaking strength and the like.
The patent with publication number CN 109206965A discloses a conductive coating for electronic products, which is composed of the following components in parts by weight: silver nanowire water dispersion, 0.3-0.6% of hydroxypropyl methyl cellulose aqueous solution, 0.8-1.2% of polyvinyl alcohol aqueous solution, 4-6% of water-soluble resin solution, a cross-linking agent XR-501, a leveling agent, a digao 670 dispersant and a digao 845 defoaming agent; the solid content of the silver nanowire water dispersion liquid is 0.3-0.5%, and the 4-6% water-soluble resin liquid is water-soluble acrylic resin liquid or water-soluble polyester resin liquid; the leveling agent adopts digao 410 or long chemical BnK-LK600, and the producer of the digao 670 dispersant is Shanghai Jing Wen chemical. After the film is formed, the indexes of adhesion fastness, light transmittance, conductivity and the like of the PET, glass, PMMA and other substrates reach or exceed the technical parameters of the existing ITO film, and the problem that the water-soluble coating is pollution-free is effectively solved, and the hardness reaches 3-4H. But the combination properties such as surface resistance and tensile breaking strength are not excellent enough.
Disclosure of Invention
Aiming at the problems, the invention provides the conductive polyurethane coating, the conductive material in the conductive polyurethane coating has fine granularity and good dispersibility, and a conductive film prepared by using the conductive coating has better volume resistance, surface resistance and tensile breaking strength.
The invention provides a conductive polyurethane coating, which comprises the following components: the composite material comprises 53.5-72.5% of waterborne polyurethane serving as a carrier, 10-18% of nano graphite powder serving as a conductor, 8-13% of nano flat spherical metal powder serving as a total mass, 9-15% of deionized water serving as a total mass and 0.1-0.3% of a wetting agent serving as a total mass.
Further, the nano flat spherical metal powder is nano nickel powder.
The invention also provides a conductive film containing the conductive polyurethane coating, which comprises a PET film, wherein the conductive polyurethane coating as claimed in any one of claims 1-2 is coated on the PET film, and the conductive polyurethane coating is dried and cured on the PET film. The PET film is provided with the grids, so that the adhesive force of the conductive polyurethane coating on the film can be increased. The conductive film has the performance of conducting electricity and eliminating static charges.
The invention also provides a preparation method of the conductive polyurethane coating, which comprises the following steps:
(1) Preparing waterborne polyurethane, nano graphite powder, nano flat spherical metal powder, deionized water and a wetting agent according to a mass ratio, and then uniformly stirring and mixing the prepared materials in a container to obtain a raw material;
(2) Adding the uniformly mixed raw materials into a ball mill, adding ceramic spheres with the diameters of 3mm, 5mm, 10mm and 15mm into the ball mill, preparing the ceramic spheres with the diameters of 3mm, 5mm, 10mm and 15mm according to a mass ratio of 2;
(3) And collecting the polyurethane conductive slurry in a stirring slurry barrel, and pumping negative pressure in the stirring slurry barrel to remove bubbles in the slurry, thereby obtaining the conductive polyurethane coating.
Further, the ball milling rotation speed of the ball mill in the step (2) is 60rmp/min, and the ball milling time is 48 hours.
The conductive polyurethane coating is prepared by grinding the conductive polyurethane coating by using a ball mill and adding ceramic spheres, the prepared conductive material has fine granularity and good dispersibility, and the conductive film prepared by using the conductive coating has better volume resistance, surface resistance and tensile breaking strength.
Detailed Description
The present invention is explained below with reference to specific examples.
An electrically conductive polyurethane coating comprising: the composite material comprises 53.5-72.5% of waterborne polyurethane serving as a carrier, 10-18% of nano graphite powder serving as a conductor, 8-13% of nano flat spherical metal powder serving as a total mass, 9-15% of deionized water serving as a total mass and 0.1-0.3% of a wetting agent serving as a total mass. The nano-scale graphite powder and the flat spherical metal powder have fine granularity and good dispersibility, are easy to be uniformly distributed in the slurry, and improve the conductivity.
Preferably, the nano flat spherical metal powder is nano nickel powder, and the nano nickel powder has conductive performance.
The invention also provides a conductive film containing the conductive polyurethane coating, which comprises a PET film, wherein the conductive polyurethane coating as claimed in any one of claims 1-2 is coated on the PET film, and the conductive polyurethane coating is dried and cured on the PET film. The PET film is provided with the grids, so that the adhesive force of the conductive polyurethane coating on the film can be increased. The conductive film has the performance of conducting electricity and removing static charges.
The invention also provides a preparation method of the conductive polyurethane coating, which comprises the following steps:
(1) Preparing waterborne polyurethane, nano graphite powder, nano flat spherical metal powder, deionized water and a wetting agent according to a mass ratio, stirring and mixing the prepared materials in a container uniformly to obtain a raw material, and uniformly distributing the nano graphite powder and the nano flat spherical metal powder in a raw material slurry;
(2) Adding the uniformly mixed raw materials into a ball mill, adding ceramic spheres with the diameters of 3mm, 5mm, 10mm and 15mm into the ball mill, preparing the ceramic spheres with the diameters of 3mm, 5mm, 10mm and 15mm according to a mass ratio of 2;
(3) And collecting the polyurethane conductive slurry in a stirring slurry barrel, and pumping negative pressure in the stirring slurry barrel to remove bubbles in the slurry, thereby obtaining the conductive polyurethane coating.
Preferably, the ball milling speed of the ball mill in the step (2) is 60rmp/min, and the ball milling time is 48 hours. The nano graphite powder and nano flat spherical metal powder particles in the slurry after ball milling at the ball milling rotating speed and the ball milling time are extremely fine and are uniformly distributed in the slurry.
The following formulations of conductive polyurethane coatings are exemplified: the water-based polyurethane accounts for 65 percent of the total mass, the nano graphite powder accounts for 15 percent of the total mass, the nano flat spherical metal powder accounts for 10 percent of the total mass, the deionized water accounts for 9 percent of the total mass, and the wetting agent accounts for 0.1 percent of the total mass. The conductive film prepared by using the conductive polyurethane coating with the formula is subjected to performance test, and the obtained test data is as follows:
as can be seen from the data in the table above, the volume resistance, the surface resistance and the tensile breaking strength of the conductive film prepared by the conductive polyurethane coating are all good, and the surface tension is more than or equal to 40dyne/cm 2 All performance indexes are balanced, and the comprehensive performance is good.
The above description should not be taken as limiting the invention to the embodiments, but rather, as will be apparent to those skilled in the art to which the invention pertains, numerous simplifications or substitutions may be made without departing from the spirit of the invention, which shall be deemed to fall within the scope of the invention as defined by the claims appended hereto.
Claims (5)
1. The conductive polyurethane coating is characterized by comprising 53.5-72.5% of waterborne polyurethane serving as a carrier, 10-18% of nano graphite powder, 8-13% of nano flat spherical metal powder, 9-15% of deionized water and 0.1-0.3% of a wetting agent.
2. The conductive polyurethane coating of claim 1, wherein the nano-platelet spherical metal powder is nano-nickel powder.
3. A conductive film comprising the conductive urethane paint according to any one of claims 1 to 2, which comprises a PET film coated with the conductive urethane paint according to any one of claims 1 to 2, and dried and cured on the PET film.
4. The method for preparing an electrically conductive polyurethane coating according to any one of claims 1 to 2, comprising the steps of:
(1) Preparing waterborne polyurethane, nano graphite powder, nano flat spherical metal powder, deionized water and a wetting agent according to a mass ratio, and then uniformly stirring and mixing the prepared materials in a container to obtain a raw material;
(2) Adding the uniformly mixed raw materials into a ball mill, adding ceramic spheres with the diameters of 3mm, 5mm, 10mm and 15mm into the ball mill, preparing the ceramic spheres with the diameters of 3mm, 5mm, 10mm and 15mm according to a mass ratio of 2;
(3) And collecting the polyurethane conductive slurry in a stirring slurry barrel, and pumping negative pressure in the stirring slurry barrel to remove bubbles in the slurry, thereby obtaining the conductive polyurethane coating.
5. The method for preparing an electrically conductive polyurethane coating according to claim 4, wherein the ball milling speed of the ball mill in the step (2) is 60rmp/min, and the ball milling time is 48 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211335551.4A CN115595055A (en) | 2022-10-28 | 2022-10-28 | Conductive polyurethane coating, conductive film and preparation method of conductive polyurethane coating |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211335551.4A CN115595055A (en) | 2022-10-28 | 2022-10-28 | Conductive polyurethane coating, conductive film and preparation method of conductive polyurethane coating |
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| Publication Number | Publication Date |
|---|---|
| CN115595055A true CN115595055A (en) | 2023-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211335551.4A Pending CN115595055A (en) | 2022-10-28 | 2022-10-28 | Conductive polyurethane coating, conductive film and preparation method of conductive polyurethane coating |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1224038A (en) * | 1997-11-13 | 1999-07-28 | 纳幕尔杜邦公司 | Water-based thick film conductive compositions |
| CN103073953A (en) * | 2013-02-07 | 2013-05-01 | 苏州牛剑新材料有限公司 | Waterborne conductive ink and preparation method thereof |
| CN103102742A (en) * | 2012-12-12 | 2013-05-15 | 张家港威迪森化学有限公司 | Preparation method of nano graphite conductive ink |
| CN105778673A (en) * | 2014-12-22 | 2016-07-20 | 中国中化股份有限公司 | Aqueous conductive paint, preparation method and applications thereof |
| CN113337198A (en) * | 2021-06-25 | 2021-09-03 | 上海戎科特种装备有限公司 | Black shading conductive coating and preparation method thereof |
| CN114479574A (en) * | 2022-01-19 | 2022-05-13 | 得嘉工业(北京)有限公司 | Water-based conductive coating and preparation method thereof |
-
2022
- 2022-10-28 CN CN202211335551.4A patent/CN115595055A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1224038A (en) * | 1997-11-13 | 1999-07-28 | 纳幕尔杜邦公司 | Water-based thick film conductive compositions |
| CN103102742A (en) * | 2012-12-12 | 2013-05-15 | 张家港威迪森化学有限公司 | Preparation method of nano graphite conductive ink |
| CN103073953A (en) * | 2013-02-07 | 2013-05-01 | 苏州牛剑新材料有限公司 | Waterborne conductive ink and preparation method thereof |
| CN105778673A (en) * | 2014-12-22 | 2016-07-20 | 中国中化股份有限公司 | Aqueous conductive paint, preparation method and applications thereof |
| CN113337198A (en) * | 2021-06-25 | 2021-09-03 | 上海戎科特种装备有限公司 | Black shading conductive coating and preparation method thereof |
| CN114479574A (en) * | 2022-01-19 | 2022-05-13 | 得嘉工业(北京)有限公司 | Water-based conductive coating and preparation method thereof |
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