WO2013075638A1 - Conductive aqueous coating for outer protection of hard rubber charging roll - Google Patents

Conductive aqueous coating for outer protection of hard rubber charging roll Download PDF

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Publication number
WO2013075638A1
WO2013075638A1 PCT/CN2012/085022 CN2012085022W WO2013075638A1 WO 2013075638 A1 WO2013075638 A1 WO 2013075638A1 CN 2012085022 W CN2012085022 W CN 2012085022W WO 2013075638 A1 WO2013075638 A1 WO 2013075638A1
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WIPO (PCT)
Prior art keywords
charging roller
agent
hard rubber
outer layer
rubber charging
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PCT/CN2012/085022
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French (fr)
Chinese (zh)
Inventor
胡华荣
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珠海天威飞马打印耗材有限公司
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Publication of WO2013075638A1 publication Critical patent/WO2013075638A1/en

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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
    • 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

Definitions

  • the present invention relates to a coating, and more particularly to an outer layer protective aqueous conductive coating for a hard rubber charging roller.
  • the charging roller is a consumable part of the laser printer.
  • the charging roller and the photosensitive drum are constantly in contact with the friction and charging and discharging, which may cause aging and wear on the surface of the charging roller for a long time, thereby causing bottom ash and sensitization during printing.
  • Drum breakdown which seriously affects print quality and printer cartridge life, so a protective conductive coating is placed on the surface of the charging roller.
  • the conductive coatings used in the conductive protective coating on the surface of the existing charging roller are oily system coatings and aqueous system coatings.
  • the oil-based system coating uses organic matter as the main solvent, which has the disadvantages of high toxicity, environmental pollution, and unstable electrical properties.
  • the aqueous system coating uses metal-based conductive materials, conductive carbon black or conductive graphite as the conductive agent, but the metal is conductive.
  • the relative price of the material is relatively high, and some metal-based conductive materials are easily oxidized, and the conductivity of the coating with conductive carbon black or conductive graphite is difficult to control, and the addition of conductive carbon black or conductive graphite is relatively easy to contaminate the toner cartridge, resulting in the existing
  • the conductive protective coating made of the aqueous system coating has defects of poor chemical stability, pollution, and insufficient conductive stability.
  • the hard rubber charging roller does not have the displacement of the sleeve, can be better adapted to high-speed printing, has uniform electric conduction, and does not cause pinhole discharge to break through the photosensitive drum.
  • its size requirements are relatively high and the processing difficulty is relatively large.
  • the technical problem to be solved by the present invention is that the prior art oil-based system coatings have the defects of high toxicity, environmental pollution, and unstable electrical properties, and the aqueous system coatings have poor chemical stability, pollution and electrical stability. Insufficient defects provide an outer layer of protective water-based conductive coating for hard rubber charging roller with good chemical stability, no pollution, stable conductivity and good controllability.
  • an outer layer protective water-based conductive coating for a hard rubber charging roller which is made of the following parts by weight: aqueous polyurethane resin emulsion 58-65, deionized Water 8-25, low molecular weight alcohol 5-20, pH adjuster 0.01, aqueous auxiliary agent 0.65-2.8, charge adjuster 1-2, acetylene black 1-2, silane coupling agent 1-1.5.
  • the aqueous polyurethane resin emulsion is a silicone-modified aqueous polyurethane emulsion or a fluororesin-modified aqueous polyurethane emulsion.
  • the low molecular weight alcohol is a mixture of ethanol and propylene glycol in any ratio.
  • the pH adjusting agent is an amine solvent soluble in water.
  • the aqueous auxiliary agent includes a dispersing agent, an antifoaming agent and a leveling agent, wherein the parts by weight of the dispersing agent is 0.5-1, the parts by weight of the antifoaming agent is 0.05-0.3, and the parts by weight of the leveling agent They are 0.1-1.5 respectively.
  • the dispersing agent is a phosphate dispersant, dimethylaminoethyl methacrylate or a sodium polycarboxylate dispersant.
  • the antifoaming agent is at least one of a mineral oil type antifoaming agent and a silicone type antifoaming agent.
  • the antifoaming agent is preferably a siloxane.
  • the leveling agent is an acrylic leveling agent, a silicone leveling agent or a fluorocarbon type leveling agent.
  • the leveling agent is preferably a silicone leveling agent.
  • the charge adjuster is a compound of a quaternary ammonium salt.
  • the invention adopts an aqueous polyurethane emulsion as a matrix resin, and adds acetylene black and a charge adjuster as a conductive agent, and simultaneously adds a low molecular weight alcohol, an aqueous system auxiliary agent, a silane coupling agent and deionized water to be uniformly mixed in a certain ratio, and mechanically stirred,
  • the coating of the present invention is obtained by sanding, filtration, or the like.
  • the water-based conductive coating of the invention adopts deionized water as a solvent instead of an organic solvent, and has no volatile organic solvent during the preparation and use, and does not pollute the environment, and is an environment-friendly coating.
  • the water-based conductive paint of the invention has good adhesion to the hard rubber charging roller, and the prepared coating is coated on the charging roller, and the coating film is wear-resistant, strong in anti-staining property and compact, and the printing test is good. It has a long life and does not pollute the drum. It satisfies the requirements of the laser printer for the hard rubber charging roller (PCR).
  • the invention can meet the requirements of the conductivity of the coating by adjusting the addition amount of the conductive agent acetylene black and the charge regulator.
  • the low molecular weight alcohol is miscible with deionized water to form a mixed aqueous coating solvent, but the low molecular weight alcohol is sprayed at a slower rate than water. Therefore, the use of low molecular weight alcohol and deionized water as a mixed solvent reduces the air drying rate and can be sprayed.
  • the coating film remains stable to achieve a good coating effect.
  • the pH adjusting agent is used to adjust the acid-base balance of the coating liquid as a whole, so that the coating liquid remains neutral, and the pH adjusting agent is combined with the solvent, which is beneficial to the curing effect of the coating film and the coating performance.
  • the silane coupling agent has two functions: 1. Before spraying, the components of the coating are not discrete and maintain good mutual solubility and maintain equilibrium. 2. After spraying and curing, the components can be tightly combined to maintain good physical properties.
  • Deionized water, low molecular weight alcohol, pH adjuster and water-based additive work together to make the coating before spraying have suitable viscosity and good mutual solubility characteristics, which is beneficial to spraying operation, and the leveling is sufficient after spraying, so that the coating effect is good. Defects, the coating is dried and cured to give the coating high density, high wear resistance, and maintain its good, stable electrical conductivity.
  • An outer layer protective aqueous conductive coating for a hard rubber charging roller made of the following parts by weight:
  • Silicone modified waterborne polyurethane emulsion 58.0 Deionized water 19.99 pH regulator (Alpamine N41) 0.01
  • Aqueous additives (dispersants, leveling agents, defoamers) 2.0 Low molecular weight alcohol (industrial alcohol) 13.0 Low molecular weight alcohol (1,2-propanediol) 2.0 Charge regulator (quaternary amine salt) 2.0 Acetylene black 1.50 Silane coupling agent (v-(methacryloyloxy)propyltrimethoxysilane) 1.50
  • the aqueous auxiliary agent includes a dispersing agent, an antifoaming agent and a leveling agent, wherein the dispersing agent is (polycarboxylate, German BYK BYK-163), and the part by weight is 0.7.
  • the defoamer is (silicone and mineral oil mixed defoamer, Becker, Germany) BYK-141), the part by weight is 0.3.
  • the leveling agent is (silicone leveling agent, BYK-333, Germany), and its weight fraction is 1.0.
  • Silane coupling agent is Japan Shin-Etsu Chemical KBM-503 or KH570 of the Chinese Academy of Sciences has a weight fraction of 1.5.
  • Method for preparing outer layer protective water-based conductive paint for hard rubber charging roller adding deionized water, pH adjuster, water-based auxiliary agent, industrial alcohol and 1,2- in the mixing container according to the ratio of the above table.
  • the mixture is uniformly stirred by adding acetylene black, and the mixture is ground on a sand mill so that the particle size of the particles in the mixture is less than 1 ⁇ m, and then the aqueous polyurethane resin emulsion and the silane coupling agent are added at 500.
  • the mixture was stirred at a stirring speed of rpm for 20 minutes, and filtered through a 200-mesh nylon mesh to obtain an aqueous conductive coating of the finished product of the present invention.
  • the outer layer of the hard rubber charging roller is sprayed into a film by a reciprocating automatic spraying device by using the water-based conductive coating prepared above, and dried at 100 ° C for 60 minutes, and the dry film thickness of the coating is controlled within 20-30 micrometers.
  • the dry film thickness of this example was 20 ⁇ m.
  • test project surface insulation resistance
  • Test method direct testing of spray products
  • Test conditions normal temperature, regular humidity
  • Test procedure 1. Insert the plate electrode into the “A” jack on the test chart;
  • the PCR is placed on the insulating plate;
  • the plate electrode (parallel electrode, two parallel aluminum plates) is placed across the product, and both plates need to be in contact with the product;
  • Test method print comparison comparison judgment
  • Test conditions normal temperature, regular humidity
  • Test instrument Spectrodensitometer, model spectroeye
  • Test conditions normal temperature, regular humidity
  • the product is loaded into the laser box
  • test point of the spectrodensitometer is placed flat on the print and needs to be measured, and the test head is pressed;
  • the displayed value is printed black
  • test part is required to read multiple sets of values
  • the surface insulation resistance of the hard rubber charging roller of this embodiment can be controlled between 0.2-0.3 megaohms, and five points are selected on the surface of the hard rubber charging roller for testing.
  • the specific test results are 0.20, 0.24, 0.21, 0.3, 0.28 megohms.
  • the charging roller After the high and low temperature test and the normal temperature test, the charging roller has no pollution to the photosensitive drum, and can reach more than two cycles of the life of the charging roller.
  • Blackness The test results of the test blackness values at the four corners of the print and the middle of the print are 1.57, 1.54, 1.52, 1.55, and 1.50, respectively.
  • Waterborne polyurethane resin emulsion 65.0 Deionized water 17.49 pH regulator (Alpamine N41) 0.01 Aqueous additives (dispersants, leveling agents, defoamers) 2.0 Low molecular weight alcohol (industrial alcohol) 10.0 Low molecular weight alcohol (1,2-propanediol) 2.0 Charge regulator (quaternary amine salt) 1.0 Acetylene black 1.0 Silane coupling agent (v-(methacryloyloxy)propyltrimethoxysilane) 1.50
  • the aqueous auxiliary agent includes a dispersing agent, an antifoaming agent and a leveling agent, wherein the dispersing agent is (dimethylaminoethyl methacrylate) and its weight fraction is 0.6.
  • the antifoaming agent is siloxane, and its part by weight is 0.3.
  • the leveling agent is (fluorocarbon-based leveling agent, grade or manufacturer AC-703, Ark (Fogang) Chemical Materials Co., Ltd.), and its weight fraction is 1.1. .
  • the silane coupling agent is Japan Shin-Etsu Chemical KBM-503 or KH570 of the Chinese Academy of Sciences, and its weight fraction is 1.5.
  • Alpamine N41 is a commercial brand number in the pH regulator.
  • the preparation method of the outer layer protective aqueous conductive coating for the hard rubber charging roller, the coating method on the charging roller, and the performance test are the same as those in the first embodiment, and are not described herein again.
  • the surface insulation resistance of the hard rubber charging roller can be controlled between 0.6-0.8 megaohms. Five points are selected on the surface of the hard rubber charging roller for testing. The specific test results are 0.8, 0.65, 0.6, 0.72. , 0.68 megohms.
  • the charging roller does not pollute the photosensitive drum, and can reach the life of the charging roller for more than two cycles.
  • Blackness The blackout value of the test draft is 1.45, 1.48, 1.42, 1.5, 1.49 at the four corners of the print and the middle part.
  • An outer layer protective aqueous conductive coating for a hard rubber charging roller made of the following parts by weight:
  • Silicone modified waterborne polyurethane emulsion 60.0 Deionized water 19.99 pH regulator (Alpamine N41) 0.01 Aqueous additives (dispersants, leveling agents, defoamers) 2.0 Low molecular weight alcohol (industrial alcohol) 13.0 Low molecular weight alcohol (1,2-propanediol) 2.0 Charge regulator (quaternary amine salt) 1.0 Acetylene black 1.0 Silane coupling agent (v-(methacryloyloxy)propyltrimethoxysilane) 1.0
  • the aqueous auxiliary agent comprises a dispersing agent, an antifoaming agent and a leveling agent
  • the dispersing agent is (a polycarboxylate sodium salt dispersing agent, Guangzhou Ondi AD-28), its weight fraction is 0.7.
  • the antifoaming agent is (silicone defoamer, Guangzhou Ondi AD-67), and its weight fraction is 0.3.
  • the leveling agent is (acrylic acid copolymer leveling agent, Dongguan Bocheng Chemical SP-958), and the weight fraction thereof is 1.0.
  • the method for preparing the outer layer of the hard rubber charging roller for protecting the aqueous conductive coating and the method for coating the charging roller are the same as those of the first embodiment, and are not described herein again.
  • the surface insulation resistance of the hard rubber charging roller of this embodiment can be controlled between 0.4-0.7 megohms. Five points are selected on the surface of the hard rubber charging roller for testing. The specific test results are 0.7, 0.5, 0.55. , 0.54, 0.4 megohms.
  • the charging roller does not pollute the photosensitive drum, and can reach the life of the charging roller for more than two cycles.
  • Blackness The test results of the test blackness values at the four corners of the print and the middle of the print are: 1.50, 1.48, 1.49, 1.47, 1.49.
  • An outer layer protective aqueous conductive coating for a hard rubber charging roller made of the following parts by weight:
  • Silicone modified waterborne polyurethane emulsion 62.0 Deionized water 8 pH regulator (Alpamine N41) 0.01 Aqueous additives (dispersants, leveling agents, defoamers) 2.8 Low molecular weight alcohol (industrial alcohol) 16.0 Low molecular weight alcohol (1,2-propanediol) 4.0 Charge regulator (quaternary amine salt) 2.0 Acetylene black 2.0 Silane coupling agent (v-(methacryloyloxy)propyltrimethoxysilane) 1.2
  • the aqueous auxiliary agent includes a dispersing agent, an antifoaming agent and a leveling agent, wherein the dispersing agent is (sodium polycarboxylate, BYK-163, Germany), and the part by weight is 1.0.
  • the defoamer is (silicone and mineral oil mixed defoamer, Becker, Germany) BYK-141), the part by weight is 0.3.
  • the leveling agent is (silicone leveling agent, BYK-333, Germany), and its weight fraction is 1.5.
  • Silane coupling agent is Japan Shin-Etsu Chemical KBM-503 or Chinese Academy of Sciences KH570 has a weight fraction of 1.2.
  • the method for preparing the outer layer of the hard rubber charging roller for protecting the aqueous conductive coating and the method for coating the charging roller are the same as those of the first embodiment, and are not described herein again.
  • the surface insulation resistance of the hard rubber charging roller of this embodiment can be controlled between 0.1-0.2 megaohms, and five points are selected on the surface of the hard rubber charging roller for testing.
  • the specific test result is 0.1, 0.12. 0.2, 0.15, 0.1.
  • the charging roller does not pollute the photosensitive drum, and can reach the life of the charging roller for more than two cycles.
  • Blackness The test results of the test blackness values at the four corners of the print and the five parts of the middle are 1.57, 1.54, 1.58, 1.54, and 1.57, respectively.
  • An outer layer protective aqueous conductive coating for a hard rubber charging roller made of the following parts by weight:
  • Silicone modified waterborne polyurethane emulsion 59.0 Deionized water 25 pH regulator (Alpamine N41) 0.01 Aqueous additives (dispersants, leveling agents, defoamers) 0.65 Low molecular weight alcohol (industrial alcohol) 1.0 Low molecular weight alcohol (1,2-propanediol) 4.0 Charge regulator (quaternary amine salt) 1.5 Acetylene black 1.5 Silane coupling agent (v-(methacryloyloxy)propyltrimethoxysilane) 1.1
  • the aqueous auxiliary agent includes a dispersing agent, an antifoaming agent and a leveling agent, wherein the dispersing agent is (sodium polycarboxylate, BYK-163, Germany), and the part by weight is 0.5.
  • the defoamer is (silicone and mineral oil mixed defoamer, Becker, Germany) BYK-141), the part by weight is 0.05.
  • the leveling agent is (silicone leveling agent, BYK-333, Germany), and the weight fraction is 0.1.
  • the silane coupling agent is Japan Shin-Etsu Chemical KBM-503 or KH570 of the Chinese Academy of Sciences, and its weight fraction is 1.1.
  • the method for preparing the outer layer of the hard rubber charging roller for protecting the aqueous conductive coating, the method for coating the charging roller, and the detecting method are the same as those in the first embodiment, and are not described herein again.
  • the surface insulation resistance of the hard rubber charging roller of this embodiment can be controlled between 0.1-0.2 megaohms, and five points are selected on the surface of the hard rubber charging roller for testing.
  • the specific test result is 0.1, 0.11. 0.1, 0.15, 0.14.
  • the charging roller does not pollute the photosensitive drum, and can reach the life of the charging roller for more than two cycles.
  • Blackness The test results of the test blackness values are 1.56, 1.55, 1.58, 1.55, and 1.54 at the four corners of the print and the middle part.
  • the present invention can be manufactured or used industrially, and has industrial applicability.

Abstract

Disclosed is a conductive aqueous coating for outer protection of a hard rubber charging roll, the coating being made of raw materials in the following weight parts: 58-65 of an aqueous polyurethane resin emulsion, 8-25 of deionized water, 5.0-20.0 of a low molecular weight alcohol, 0.01 of a pH value conditioner, 0.4-2.0 of an aqueous aid, 1.0-2.0 of a charge conditioner, 1.0-2.0 of acetylene black, and 1.0-1.5 of a silane coupling agent. The coating has the advantages of good chemical stability, no pollution, stable electrical conductivity, and good controllability.

Description

用于硬质橡胶充电辊的外层保护水性导电涂料  Protective coating for outer layer of hard rubber charging roller 技术领域Technical field
本发明涉及一种涂料，尤其涉及一种用于硬质橡胶充电辊的外层保护水性导电涂料。本申请要求于2011年11月25日提交中国专利局、申请号为201110381976.4、名称为“用于硬质橡胶充电辊的外层保护水性导电涂料”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。 The present invention relates to a coating, and more particularly to an outer layer protective aqueous conductive coating for a hard rubber charging roller. This application claims priority to Chinese Patent Application No. 201110381976.4, entitled "Outer Protective Waterborne Conductive Coating for Hard Rubber Charging Rollers", which was submitted to the Chinese Patent Office on November 25, 2011. The citations are incorporated herein by reference.
背景技术Background technique
充电辊是激光打印机的一个易耗件，因打印机使用过程中，充电辊和感光鼓不断接触磨擦和充放电，长时间会引起充电辊表面的老化及磨损，从而导致打印时出现底灰和感光鼓击穿，严重影响打印质量和打印机硒鼓寿命，因此，会在充电辊表面设置保护性导电涂层。The charging roller is a consumable part of the laser printer. During the use of the printer, the charging roller and the photosensitive drum are constantly in contact with the friction and charging and discharging, which may cause aging and wear on the surface of the charging roller for a long time, thereby causing bottom ash and sensitization during printing. Drum breakdown, which seriously affects print quality and printer cartridge life, so a protective conductive coating is placed on the surface of the charging roller.
现有的充电辊表面的导电保护涂层采用的导电涂料有油性体系涂料和水性体系涂料。其中油性体系涂料以有机物作为主要溶剂，其存在毒性大、对环境污染、且电性能不稳定等不足；水性体系涂料采用金属系导电料、导电碳黑或导电石墨作为导电剂，但金属系导电料相对价格较高，且有些金属系导电料易氧化，而加入导电碳黑或导电石墨的涂料的导电性能难于控制，另外导电碳黑或导电石墨添加量较大易污染硒鼓，导致现有的水性体系涂料制成的导电保护涂层存在化学稳定性较差、有污染和导电稳定性不足的缺陷。The conductive coatings used in the conductive protective coating on the surface of the existing charging roller are oily system coatings and aqueous system coatings. Among them, the oil-based system coating uses organic matter as the main solvent, which has the disadvantages of high toxicity, environmental pollution, and unstable electrical properties. The aqueous system coating uses metal-based conductive materials, conductive carbon black or conductive graphite as the conductive agent, but the metal is conductive. The relative price of the material is relatively high, and some metal-based conductive materials are easily oxidized, and the conductivity of the coating with conductive carbon black or conductive graphite is difficult to control, and the addition of conductive carbon black or conductive graphite is relatively easy to contaminate the toner cartridge, resulting in the existing The conductive protective coating made of the aqueous system coating has defects of poor chemical stability, pollution, and insufficient conductive stability.
硬质橡胶充电辊与套管类充电辊软辊比较，其不会有套管的移位，能较好适应高速打印，导电均匀，不会产生针孔放电击穿感光鼓。但是其尺寸要求较高，加工难度相比较大。Compared with the sleeve-type charging roller soft roller, the hard rubber charging roller does not have the displacement of the sleeve, can be better adapted to high-speed printing, has uniform electric conduction, and does not cause pinhole discharge to break through the photosensitive drum. However, its size requirements are relatively high and the processing difficulty is relatively large.
技术问题technical problem
本发明要解决的技术问题在于，针对现有技术中油性体系涂料存在毒性大、对环境污染、且电性能不稳定的缺陷，以及水性体系涂料存在化学稳定性较差、有污染和导电稳定性不足的缺陷，提供一种化学稳定性好、无污染、导电性稳定且可控性好的用于硬质橡胶充电辊的外层保护水性导电涂料。 The technical problem to be solved by the present invention is that the prior art oil-based system coatings have the defects of high toxicity, environmental pollution, and unstable electrical properties, and the aqueous system coatings have poor chemical stability, pollution and electrical stability. Insufficient defects provide an outer layer of protective water-based conductive coating for hard rubber charging roller with good chemical stability, no pollution, stable conductivity and good controllability.
技术解决方案Technical solution
本发明解决其技术问题所采用的技术方案是：一种用于硬质橡胶充电辊的外层保护水性导电涂料，由以下重量份数的原料制成：水性聚氨酯树脂乳液58-65、去离子水8-25、低分子量醇5-20、pH值调节剂0.01、水性助剂0.65-2.8、电荷调整剂1-2、乙炔黑1-2、硅烷偶联剂1-1.5。The technical solution adopted by the invention to solve the technical problem is: an outer layer protective water-based conductive coating for a hard rubber charging roller, which is made of the following parts by weight: aqueous polyurethane resin emulsion 58-65, deionized Water 8-25, low molecular weight alcohol 5-20, pH adjuster 0.01, aqueous auxiliary agent 0.65-2.8, charge adjuster 1-2, acetylene black 1-2, silane coupling agent 1-1.5.
所述水性聚氨酯树脂乳液为硅树脂改性的水性聚氨酯乳液或氟树脂改性的水性聚氨酯乳液。The aqueous polyurethane resin emulsion is a silicone-modified aqueous polyurethane emulsion or a fluororesin-modified aqueous polyurethane emulsion.
所述低份子量醇为乙醇和丙二醇任意比例的混和物。The low molecular weight alcohol is a mixture of ethanol and propylene glycol in any ratio.
所述pH值调节剂为溶于水的胺类溶剂。The pH adjusting agent is an amine solvent soluble in water.
所述水性助剂包括分散剂、消泡剂和流平剂，其中分散剂的重量份数为0.5-1、所述消泡剂的重量份数为0.05-0.3、流平剂的重量份数分别为0.1-1.5。The aqueous auxiliary agent includes a dispersing agent, an antifoaming agent and a leveling agent, wherein the parts by weight of the dispersing agent is 0.5-1, the parts by weight of the antifoaming agent is 0.05-0.3, and the parts by weight of the leveling agent They are 0.1-1.5 respectively.
所述分散剂为磷酸酯类分散剂、甲基丙烯酸二甲氨基乙酯或聚羧酸钠盐分散剂。The dispersing agent is a phosphate dispersant, dimethylaminoethyl methacrylate or a sodium polycarboxylate dispersant.
所述消泡剂为矿物油类消泡剂、聚硅氧烷类消泡剂中的至少一种。所述消泡剂优选硅氧烷。The antifoaming agent is at least one of a mineral oil type antifoaming agent and a silicone type antifoaming agent. The antifoaming agent is preferably a siloxane.
所述流平剂为丙烯酸类流平剂、有机硅类流平剂或氟碳化合物类流平剂。The leveling agent is an acrylic leveling agent, a silicone leveling agent or a fluorocarbon type leveling agent.
所述流平剂优选有机硅类流平剂。The leveling agent is preferably a silicone leveling agent.
所述电荷调整剂为季胺盐类的化合物。The charge adjuster is a compound of a quaternary ammonium salt.
有益效果Beneficial effect
本发明以水性聚氨酯乳液作为基体树脂，加入乙炔黑和电荷调整剂作为导电剂，同时加入低分子量醇、水性体系助剂、硅烷偶联剂和去离子水按一定比例混合均匀，经机械搅拌、砂磨、过滤等制得本发明涂料。The invention adopts an aqueous polyurethane emulsion as a matrix resin, and adds acetylene black and a charge adjuster as a conductive agent, and simultaneously adds a low molecular weight alcohol, an aqueous system auxiliary agent, a silane coupling agent and deionized water to be uniformly mixed in a certain ratio, and mechanically stirred, The coating of the present invention is obtained by sanding, filtration, or the like.
本发明的水性导电涂料采用去离子水为溶剂而不采用有机溶剂，制备和使用过程中，不会有挥发的有机溶剂，不会对环境造成污染，是一种环境友好型的涂料。本发明的水性导电涂料对硬质橡胶充电辊有很好的附着力，制成的涂料在充电辊上涂覆干燥后的涂膜耐磨、抗沾污性强和致密性很好，打印测试寿命很长，不会污染感光鼓，在性能上满足了激光打印机对硬质橡胶充电辊（PCR）的要求。The water-based conductive coating of the invention adopts deionized water as a solvent instead of an organic solvent, and has no volatile organic solvent during the preparation and use, and does not pollute the environment, and is an environment-friendly coating. The water-based conductive paint of the invention has good adhesion to the hard rubber charging roller, and the prepared coating is coated on the charging roller, and the coating film is wear-resistant, strong in anti-staining property and compact, and the printing test is good. It has a long life and does not pollute the drum. It satisfies the requirements of the laser printer for the hard rubber charging roller (PCR).
本发明可以通过调节导电剂乙炔黑和电荷调整剂的添加量来满足涂料导电性的要求。The invention can meet the requirements of the conductivity of the coating by adjusting the addition amount of the conductive agent acetylene black and the charge regulator.
低分子量醇与去离子水混溶形成混合水性涂料溶剂，但低分子量醇喷涂后风干速率比水慢，因此采用低分子量醇与去离子水混溶作为混合溶剂相应降低了风干速率，可以使喷涂的涂膜保持稳定从而达到良好的涂层效果。The low molecular weight alcohol is miscible with deionized water to form a mixed aqueous coating solvent, but the low molecular weight alcohol is sprayed at a slower rate than water. Therefore, the use of low molecular weight alcohol and deionized water as a mixed solvent reduces the air drying rate and can be sprayed. The coating film remains stable to achieve a good coating effect.
采用pH值调节剂作用是调节涂液整体的酸碱平衡，使涂液保持中性，pH值调节剂与溶剂配合在一起，有利于涂膜固化效果和涂层性能效果。The pH adjusting agent is used to adjust the acid-base balance of the coating liquid as a whole, so that the coating liquid remains neutral, and the pH adjusting agent is combined with the solvent, which is beneficial to the curing effect of the coating film and the coating performance.
硅烷偶联剂作用有两点：1.喷涂前让涂料各组份不离散保持良好互溶，保持均衡状态 2.喷涂并固化后则可使各组份间结合紧密，保持良好物性。The silane coupling agent has two functions: 1. Before spraying, the components of the coating are not discrete and maintain good mutual solubility and maintain equilibrium. 2. After spraying and curing, the components can be tightly combined to maintain good physical properties.
去离子水、低分子量醇、pH调节剂和水性助剂协同作用，让喷涂前的涂料具有合适的粘度和良好的互溶特性，有利于喷涂作业，喷涂后流平充分，使涂膜效果良好无缺陷，涂层干燥固化后让涂层获得高致密性、高耐磨性，并保持其良好、稳定的导电性能。Deionized water, low molecular weight alcohol, pH adjuster and water-based additive work together to make the coating before spraying have suitable viscosity and good mutual solubility characteristics, which is beneficial to spraying operation, and the leveling is sufficient after spraying, so that the coating effect is good. Defects, the coating is dried and cured to give the coating high density, high wear resistance, and maintain its good, stable electrical conductivity.
本发明的实施方式Embodiments of the invention
实施例1Example 1
一种用于硬质橡胶充电辊的外层保护水性导电涂料，由以下重量份数的原料制成：An outer layer protective aqueous conductive coating for a hard rubber charging roller, made of the following parts by weight:
组 份 Component 重量份数 Parts by weight
硅树脂改性的水性聚氨酯乳液 Silicone modified waterborne polyurethane emulsion 58.0 58.0
去离子水 Deionized water 19.99 19.99
pH 值调节剂（Alpamine N41） pH regulator (Alpamine N41) 0.01 0.01
水性助剂（分散剂，流平剂，消泡剂） Aqueous additives (dispersants, leveling agents, defoamers) 2.0 2.0
低分子量醇（工业酒精） Low molecular weight alcohol (industrial alcohol) 13.0 13.0
低分子量醇（1，2-丙二醇） Low molecular weight alcohol (1,2-propanediol) 2.0 2.0
电荷调整剂（季胺盐） Charge regulator (quaternary amine salt) 2.0 2.0
乙炔黑 Acetylene black 1.50 1.50
硅烷偶联剂（v-（甲基丙烯酰氧）丙基三甲氧基硅烷） Silane coupling agent (v-(methacryloyloxy)propyltrimethoxysilane) 1.50 1.50
其中，水性助剂包括分散剂、消泡剂和流平剂，其中分散剂为（聚羧酸钠，德国毕克BYK-163），其重量份数为0.7。其中消泡剂为（硅氧烷及矿物油混合类消泡剂，德国毕克 BYK-141），其重量份数为0.3。其中流平剂为（有机硅类流平剂，德国毕克BYK-333），其重量份数为1.0 。硅烷偶联剂为 日本信越化学KBM-503或中国科学院的KH570，其重量份数为1.5。 Among them, the aqueous auxiliary agent includes a dispersing agent, an antifoaming agent and a leveling agent, wherein the dispersing agent is (polycarboxylate, German BYK BYK-163), and the part by weight is 0.7. Among them, the defoamer is (silicone and mineral oil mixed defoamer, Becker, Germany) BYK-141), the part by weight is 0.3. The leveling agent is (silicone leveling agent, BYK-333, Germany), and its weight fraction is 1.0. Silane coupling agent is Japan Shin-Etsu Chemical KBM-503 or KH570 of the Chinese Academy of Sciences has a weight fraction of 1.5.
用于硬质橡胶充电辊的外层保护水性导电涂料的制备方法：按照上述表的配比依次在混合容器中加入去离子水、pH值调节剂、水性助剂、工业酒精和1，2-丙二醇和电荷调整剂搅拌均匀后，接着加入乙炔黑搅拌均匀得到混合物，将混合物在砂磨机上研磨，使得混合物中微粒的粒度小于1微米，再加入水性聚氨酯树脂乳液和硅烷偶联剂在500转/分的搅拌速度下搅拌20分钟，用200目的尼龙网过滤而得到本发明成品的水性导电涂料。Method for preparing outer layer protective water-based conductive paint for hard rubber charging roller: adding deionized water, pH adjuster, water-based auxiliary agent, industrial alcohol and 1,2- in the mixing container according to the ratio of the above table. After the propylene glycol and the charge adjuster are uniformly stirred, the mixture is uniformly stirred by adding acetylene black, and the mixture is ground on a sand mill so that the particle size of the particles in the mixture is less than 1 μm, and then the aqueous polyurethane resin emulsion and the silane coupling agent are added at 500. The mixture was stirred at a stirring speed of rpm for 20 minutes, and filtered through a 200-mesh nylon mesh to obtain an aqueous conductive coating of the finished product of the present invention.
采用上面制成的水性导电涂料通过往复自动喷涂设备对硬质橡胶充电辊外层喷涂成膜，在100℃下烘干60分钟成型，其涂层的干膜厚度控制在20-30微米内，本实施例的干膜厚度为20微米。 The outer layer of the hard rubber charging roller is sprayed into a film by a reciprocating automatic spraying device by using the water-based conductive coating prepared above, and dried at 100 ° C for 60 minutes, and the dry film thickness of the coating is controlled within 20-30 micrometers. The dry film thickness of this example was 20 μm.
硬质橡胶充电辊的性能检测：Performance test of hard rubber charging roller:
一、测试项目：表面绝缘电阻First, the test project: surface insulation resistance
测试方法：喷涂产品直接测试Test method: direct testing of spray products
测试仪器：surface Resistance Test Kit (美国) 型号：EMI-20780Test Equipment: surface Resistance Test Kit (USA) Model: EMI-20780
测试条件：常温，常湿Test conditions: normal temperature, regular humidity
测试步骤：1.配套平板电极***测试表上的 “A” 插孔；Test procedure: 1. Insert the plate electrode into the “A” jack on the test chart;
2.喷涂后PCR平放于绝缘板上； 2. After spraying, the PCR is placed on the insulating plate;
3.平板电极(平行电极,两片平行的铝板),横跨放于产品上,两片板都需与产品接触； 3. The plate electrode (parallel electrode, two parallel aluminum plates) is placed across the product, and both plates need to be in contact with the product;
4.按住 “D”测试按键15秒,所显示结果就是表面电阻； 4. Press and hold the “D” test button for 15 seconds, the result is the surface resistance;
5.更换与产品的接触位置,测出不同部位的表面电阻； 5. Replace the contact position with the product and measure the surface resistance of different parts;
二、测试项目：污染性 Second, the test project: pollution
测试方法：打印稿对比评判Test method: print comparison comparison judgment
测试仪器：目测Test instrument: visual inspection
测试条件：常温，常湿Test conditions: normal temperature, regular humidity
测试步骤：Test steps:
1. 装入激光盒（成品状态），打印出初稿保管好；1. Load the laser box (finished product status), print out the first draft and keep it safe;
2. 再置于室温条件下放置15天或1个月；2. Place at room temperature for 15 days or 1 month;
3. 然后再次打印，前后打印稿对比，看是否有变化，如果稿面无变化测可评判其对感光鼓无污染；3. Then print again, before and after the print comparison, to see if there is any change, if there is no change in the draft, it can be judged that it is not polluted to the photosensitive drum;
三、测试项目：黑度Third, the test project: blackness
测试方法：打印稿测试Test method: print test
测试仪器：分光密度计，型号 spectroeyeTest instrument: Spectrodensitometer, model spectroeye
测试条件：常温，常湿Test conditions: normal temperature, regular humidity
测试步骤：Test steps:
1． 产品装入激光盒；1. The product is loaded into the laser box;
2． 打印稿；2. Printed draft
3． 分光密度计测试口对准平放于打印稿需测位，按下测试头；3. The test point of the spectrodensitometer is placed flat on the print and needs to be measured, and the test head is pressed;
4． 所显数值就 打印稿黑度；4. The displayed value is printed black;
5． 如3-4更换打印稿需测试部位，读取多组数值；5. If 3-4 replaces the printed draft, the test part is required to read multiple sets of values;
表面绝缘电阻：本实施例硬质橡胶充电辊的表面绝缘电阻可控制在0.2-0.3兆欧之间，在硬质橡胶充电辊的表面选择五个点进行测试，具体测试结果为0.20、0.24、0.21、0.3、0.28兆欧。Surface insulation resistance: The surface insulation resistance of the hard rubber charging roller of this embodiment can be controlled between 0.2-0.3 megaohms, and five points are selected on the surface of the hard rubber charging roller for testing. The specific test results are 0.20, 0.24, 0.21, 0.3, 0.28 megohms.
污染性测试：高低温测试和常温测试后充电辊对感光鼓都没有污染，可达到充电辊寿命的两个周期以上。Contamination test: After the high and low temperature test and the normal temperature test, the charging roller has no pollution to the photosensitive drum, and can reach more than two cycles of the life of the charging roller.
黑度：测试稿黑度值在打印稿四角和中间部位五处的检测结果分别是1.57、1.54、1.52、1.55、1.50 。Blackness: The test results of the test blackness values at the four corners of the print and the middle of the print are 1.57, 1.54, 1.52, 1.55, and 1.50, respectively.
实施例2 Example 2
实施例2硬质橡胶充电辊（PCR）外层保护水性导电涂料按以下表的配方进行配制：Example 2 Hard Rubber Charging Roller (PCR) The outer layer protective aqueous conductive coating was formulated according to the following formula:
组 份 Component 重量份数 Parts by weight
水性聚氨酯树脂乳液 Waterborne polyurethane resin emulsion 65.0 65.0
去离子水 Deionized water 17.49 17.49
pH 值调节剂（Alpamine N41） pH regulator (Alpamine N41) 0.01 0.01
水性助剂（分散剂，流平剂，消泡剂） Aqueous additives (dispersants, leveling agents, defoamers) 2.0 2.0
低分子量醇（工业酒精） Low molecular weight alcohol (industrial alcohol) 10.0 10.0
低分子量醇（1，2-丙二醇） Low molecular weight alcohol (1,2-propanediol) 2.0 2.0
电荷调整剂（季胺盐） Charge regulator (quaternary amine salt) 1.0 1.0
乙炔黑 Acetylene black 1.0 1.0
硅烷偶联剂（v-（甲基丙烯酰氧）丙基三甲氧基硅烷） Silane coupling agent (v-(methacryloyloxy)propyltrimethoxysilane) 1.50 1.50
其中，水性助剂包括分散剂、消泡剂和流平剂，其中分散剂为（甲基丙烯酸二甲氨基乙酯）、其重量份数为0.6。其中消泡剂为硅氧烷、其重量份数为0.3。其中流平剂为（氟碳化合物类流平剂，牌号或厂家AC-703，方舟（佛冈）化学材料有限公司），其重量份数为1.1 。硅烷偶联剂为 日本信越化学KBM-503或中国科学院的KH570，其重量份数为1.5。pH值调节剂中Alpamine N41为商品牌号。Among them, the aqueous auxiliary agent includes a dispersing agent, an antifoaming agent and a leveling agent, wherein the dispersing agent is (dimethylaminoethyl methacrylate) and its weight fraction is 0.6. The antifoaming agent is siloxane, and its part by weight is 0.3. The leveling agent is (fluorocarbon-based leveling agent, grade or manufacturer AC-703, Ark (Fogang) Chemical Materials Co., Ltd.), and its weight fraction is 1.1. . The silane coupling agent is Japan Shin-Etsu Chemical KBM-503 or KH570 of the Chinese Academy of Sciences, and its weight fraction is 1.5. Alpamine N41 is a commercial brand number in the pH regulator.
本实施例用于硬质橡胶充电辊的外层保护水性导电涂料的制备方法、在充电辊上涂覆方法、性能测试同实施例1，在此不再赘述。The preparation method of the outer layer protective aqueous conductive coating for the hard rubber charging roller, the coating method on the charging roller, and the performance test are the same as those in the first embodiment, and are not described herein again.
检测结果：Test results:
表面绝缘电阻：硬质橡胶充电辊的表面绝缘电阻可控制在0.6-0.8兆欧之间，在硬质橡胶充电辊的表面选择五个点进行测试，具体测试结果为0.8、0.65、0.6、0.72、0.68兆欧。Surface insulation resistance: The surface insulation resistance of the hard rubber charging roller can be controlled between 0.6-0.8 megaohms. Five points are selected on the surface of the hard rubber charging roller for testing. The specific test results are 0.8, 0.65, 0.6, 0.72. , 0.68 megohms.
污染性：高低温测试和常温测试后充电辊对感光鼓没有污染，可达到充电辊寿命的两个周期以上。Contamination: After the high and low temperature test and the normal temperature test, the charging roller does not pollute the photosensitive drum, and can reach the life of the charging roller for more than two cycles.
黑度：测试稿黑度值在打印稿四角和中间部位五处的检测结果分别是1.45、1.48、1.42、1.5、1.49。Blackness: The blackout value of the test draft is 1.45, 1.48, 1.42, 1.5, 1.49 at the four corners of the print and the middle part.
实施例3Example 3
一种用于硬质橡胶充电辊的外层保护水性导电涂料，由以下重量份数的原料制成：An outer layer protective aqueous conductive coating for a hard rubber charging roller, made of the following parts by weight:
组 份 Component 重量份数 Parts by weight
硅树脂改性的水性聚氨酯乳液 Silicone modified waterborne polyurethane emulsion 60.0 60.0
去离子水 Deionized water 19.99 19.99
pH 值调节剂（Alpamine N41） pH regulator (Alpamine N41) 0.01 0.01
水性助剂（分散剂，流平剂，消泡剂） Aqueous additives (dispersants, leveling agents, defoamers) 2.0 2.0
低分子量醇（工业酒精） Low molecular weight alcohol (industrial alcohol) 13.0 13.0
低分子量醇（1，2-丙二醇） Low molecular weight alcohol (1,2-propanediol) 2.0 2.0
电荷调整剂（季胺盐） Charge regulator (quaternary amine salt) 1.0 1.0
乙炔黑 Acetylene black 1.0 1.0
硅烷偶联剂（v-（甲基丙烯酰氧）丙基三甲氧基硅烷） Silane coupling agent (v-(methacryloyloxy)propyltrimethoxysilane) 1.0 1.0
其中，水性助剂包括分散剂、消泡剂和流平剂，其中分散剂为（聚羧酸钠盐分散剂, 广州昂迪AD-28），其重量份数为0.7。其中消泡剂为（硅氧烷消泡剂,广州昂迪AD-67），其重量份数为0.3。其中流平剂为（丙烯酸共聚物流平剂,东莞博诚化工SP-958），其重量份数分别为1.0。Wherein, the aqueous auxiliary agent comprises a dispersing agent, an antifoaming agent and a leveling agent, wherein the dispersing agent is (a polycarboxylate sodium salt dispersing agent, Guangzhou Ondi AD-28), its weight fraction is 0.7. The antifoaming agent is (silicone defoamer, Guangzhou Ondi AD-67), and its weight fraction is 0.3. The leveling agent is (acrylic acid copolymer leveling agent, Dongguan Bocheng Chemical SP-958), and the weight fraction thereof is 1.0.
本实施例用于硬质橡胶充电辊的外层保护水性导电涂料的制备方法、在充电辊上涂覆方法同实施例1，在此不再赘述。The method for preparing the outer layer of the hard rubber charging roller for protecting the aqueous conductive coating and the method for coating the charging roller are the same as those of the first embodiment, and are not described herein again.
检测结果：Test results:
表面绝缘电阻：本实施例硬质橡胶充电辊的表面绝缘电阻可控制在0.4-0.7兆欧之间在硬质橡胶充电辊的表面选择五个点进行测试，具体测试结果为0.7、0.5、0.55、0.54、0.4兆欧。Surface insulation resistance: The surface insulation resistance of the hard rubber charging roller of this embodiment can be controlled between 0.4-0.7 megohms. Five points are selected on the surface of the hard rubber charging roller for testing. The specific test results are 0.7, 0.5, 0.55. , 0.54, 0.4 megohms.
污染性：高低温测试和常温测试后充电辊对感光鼓没有污染，可达到充电辊寿命的两个周期以上。Contamination: After the high and low temperature test and the normal temperature test, the charging roller does not pollute the photosensitive drum, and can reach the life of the charging roller for more than two cycles.
黑度：测试稿黑度值在打印稿四角和中间部位五处的检测结果分别是： 1.50、1.48、1.49、1.47、1.49。Blackness: The test results of the test blackness values at the four corners of the print and the middle of the print are: 1.50, 1.48, 1.49, 1.47, 1.49.
实施例4Example 4
一种用于硬质橡胶充电辊的外层保护水性导电涂料，由以下重量份数的原料制成：An outer layer protective aqueous conductive coating for a hard rubber charging roller, made of the following parts by weight:
组 份 Component 重量份数 Parts by weight
硅树脂改性的水性聚氨酯乳液 Silicone modified waterborne polyurethane emulsion 62.0 62.0
去离子水 Deionized water 8 8
pH 值调节剂（Alpamine N41） pH regulator (Alpamine N41) 0.01 0.01
水性助剂（分散剂，流平剂，消泡剂） Aqueous additives (dispersants, leveling agents, defoamers) 2.8 2.8
低分子量醇（工业酒精） Low molecular weight alcohol (industrial alcohol) 16.0 16.0
低分子量醇（1，2-丙二醇） Low molecular weight alcohol (1,2-propanediol) 4.0 4.0
电荷调整剂（季胺盐） Charge regulator (quaternary amine salt) 2.0 2.0
乙炔黑 Acetylene black 2.0 2.0
硅烷偶联剂（v-（甲基丙烯酰氧）丙基三甲氧基硅烷） Silane coupling agent (v-(methacryloyloxy)propyltrimethoxysilane) 1.2 1.2
其中，水性助剂包括分散剂、消泡剂和流平剂，其中分散剂为（聚羧酸钠，德国毕克BYK-163），其重量份数为1.0。其中消泡剂为（硅氧烷及矿物油混合类消泡剂，德国毕克 BYK-141），其重量份数为0.3。其中流平剂为（有机硅类流平剂，德国毕克BYK-333），其重量份数为1.5 。硅烷偶联剂为 日本信越化学KBM-503或中国科学院的KH570，其重量份数为1.2。Among them, the aqueous auxiliary agent includes a dispersing agent, an antifoaming agent and a leveling agent, wherein the dispersing agent is (sodium polycarboxylate, BYK-163, Germany), and the part by weight is 1.0. Among them, the defoamer is (silicone and mineral oil mixed defoamer, Becker, Germany) BYK-141), the part by weight is 0.3. The leveling agent is (silicone leveling agent, BYK-333, Germany), and its weight fraction is 1.5. Silane coupling agent is Japan Shin-Etsu Chemical KBM-503 or Chinese Academy of Sciences KH570 has a weight fraction of 1.2.
本实施例用于硬质橡胶充电辊的外层保护水性导电涂料的制备方法、在充电辊上涂覆方法同实施例1，在此不再赘述。The method for preparing the outer layer of the hard rubber charging roller for protecting the aqueous conductive coating and the method for coating the charging roller are the same as those of the first embodiment, and are not described herein again.
检测结果：Test results:
表面绝缘电阻：本实施例硬质橡胶充电辊的表面绝缘电阻可控制在0.1-0.2兆欧之间，在硬质橡胶充电辊的表面选择五个点进行测试，具体测试结果为0.1、0.12、0.2、0.15、0.1。Surface insulation resistance: The surface insulation resistance of the hard rubber charging roller of this embodiment can be controlled between 0.1-0.2 megaohms, and five points are selected on the surface of the hard rubber charging roller for testing. The specific test result is 0.1, 0.12. 0.2, 0.15, 0.1.
污染性：高低温测试和常温测试后充电辊对感光鼓没有污染，可达到充电辊寿命的两个周期以上。Contamination: After the high and low temperature test and the normal temperature test, the charging roller does not pollute the photosensitive drum, and can reach the life of the charging roller for more than two cycles.
黑度：测试稿黑度值在打印稿四角和中间部位五处的检测结果分别是1.57、1.54、1.58、1.54、1.57。Blackness: The test results of the test blackness values at the four corners of the print and the five parts of the middle are 1.57, 1.54, 1.58, 1.54, and 1.57, respectively.
实施例5Example 5
一种用于硬质橡胶充电辊的外层保护水性导电涂料，由以下重量份数的原料制成：An outer layer protective aqueous conductive coating for a hard rubber charging roller, made of the following parts by weight:
组 份 Component 重量份数 Parts by weight
硅树脂改性的水性聚氨酯乳液 Silicone modified waterborne polyurethane emulsion 59.0 59.0
去离子水 Deionized water 25 25
pH 值调节剂（Alpamine N41） pH regulator (Alpamine N41) 0.01 0.01
水性助剂（分散剂，流平剂，消泡剂） Aqueous additives (dispersants, leveling agents, defoamers) 0.65 0.65
低分子量醇（工业酒精） Low molecular weight alcohol (industrial alcohol) 1.0 1.0
低分子量醇（1，2-丙二醇） Low molecular weight alcohol (1,2-propanediol) 4.0 4.0
电荷调整剂（季胺盐） Charge regulator (quaternary amine salt) 1.5 1.5
乙炔黑 Acetylene black 1.5 1.5
硅烷偶联剂（v-（甲基丙烯酰氧）丙基三甲氧基硅烷） Silane coupling agent (v-(methacryloyloxy)propyltrimethoxysilane) 1.1 1.1
其中，水性助剂包括分散剂、消泡剂和流平剂，其中分散剂为（聚羧酸钠，德国毕克BYK-163），其重量份数为0.5。其中消泡剂为（硅氧烷及矿物油混合类消泡剂，德国毕克 BYK-141），其重量份数为0.05。其中流平剂为（有机硅类流平剂，德国毕克BYK-333），其重量份数为0.1。硅烷偶联剂为日本信越化学KBM-503或中国科学院的KH570，其重量份数为1.1。Among them, the aqueous auxiliary agent includes a dispersing agent, an antifoaming agent and a leveling agent, wherein the dispersing agent is (sodium polycarboxylate, BYK-163, Germany), and the part by weight is 0.5. Among them, the defoamer is (silicone and mineral oil mixed defoamer, Becker, Germany) BYK-141), the part by weight is 0.05. The leveling agent is (silicone leveling agent, BYK-333, Germany), and the weight fraction is 0.1. The silane coupling agent is Japan Shin-Etsu Chemical KBM-503 or KH570 of the Chinese Academy of Sciences, and its weight fraction is 1.1.
本实施例用于硬质橡胶充电辊的外层保护水性导电涂料的制备方法、在充电辊上涂覆方法、检测方法同实施例1，在此不再赘述。The method for preparing the outer layer of the hard rubber charging roller for protecting the aqueous conductive coating, the method for coating the charging roller, and the detecting method are the same as those in the first embodiment, and are not described herein again.
检测结果：Test results:
表面绝缘电阻：本实施例硬质橡胶充电辊的表面绝缘电阻可控制在0.1-0.2兆欧之间，在硬质橡胶充电辊的表面选择五个点进行测试，具体测试结果为0.1、0.11、0.1、0.15、0.14。Surface insulation resistance: The surface insulation resistance of the hard rubber charging roller of this embodiment can be controlled between 0.1-0.2 megaohms, and five points are selected on the surface of the hard rubber charging roller for testing. The specific test result is 0.1, 0.11. 0.1, 0.15, 0.14.
污染性：高低温测试和常温测试后充电辊对感光鼓没有污染，可达到充电辊寿命的两个周期以上。Contamination: After the high and low temperature test and the normal temperature test, the charging roller does not pollute the photosensitive drum, and can reach the life of the charging roller for more than two cycles.
黑度：测试稿黑度值在打印稿四角和中间部位五处的检测结果分别是1.56、1.55、1.58、1.55、1.54。Blackness: The test results of the test blackness values are 1.56, 1.55, 1.58, 1.55, and 1.54 at the four corners of the print and the middle part.
工业实用性Industrial applicability
本发明可以在工业上制造或使用，具备工业实用性。 The present invention can be manufactured or used industrially, and has industrial applicability.

Claims (9)

  1. 一种用于硬质橡胶充电辊的外层保护水性导电涂料，其特征在于，由以下重量份数的原料制成：水性聚氨酯树脂乳液58-65、去离子水8-25、低分子量醇5-20、pH值调节剂0.01、水性助剂0.65-2.8、电荷调整剂1-2、乙炔黑1-2、硅烷偶联剂1-1.5。 An outer layer protective aqueous conductive coating for a hard rubber charging roller, which is characterized by being made of the following raw materials by weight: aqueous polyurethane resin emulsion 58-65, deionized water 8-25, low molecular weight alcohol 5 -20, pH adjuster 0.01, water-based auxiliary agent 0.65-2.8, charge adjuster 1-2, acetylene black 1-2, silane coupling agent 1-1.5.
  2. 根据权利要求1所述的用于硬质橡胶充电辊的外层保护水性导电涂料，其特征在于，所述水性聚氨酯树脂乳液为硅树脂改性的水性聚氨酯乳液或氟树脂改性的水性聚氨酯乳液。The outer layer protective water-based conductive paint for a hard rubber charging roller according to claim 1, wherein the aqueous polyurethane resin emulsion is a silicone-modified water-based polyurethane emulsion or a fluororesin-modified water-based polyurethane emulsion. .
  3. 根据权利要求1所述的用于硬质橡胶充电辊的外层保护水性导电涂料，其特征在于，所述低份子量醇为乙醇和丙二醇任意比例的混和物。The outer layer protective aqueous conductive paint for a hard rubber charging roller according to claim 1, wherein the low molecular weight alcohol is a mixture of ethanol and propylene glycol in any ratio.
  4. 根据权利要求1所述的用于硬质橡胶充电辊的外层保护水性导电涂料，其特征在于，所述pH值调节剂为溶于水的胺类溶剂。The outer layer protective aqueous conductive paint for a hard rubber charging roller according to claim 1, wherein the pH adjuster is a water-soluble amine solvent.
  5. 根据权利要求1所述的用于硬质橡胶充电辊的外层保护水性导电涂料，其特征在于，所述水性助剂包括分散剂、消泡剂和流平剂，其中它们的重量份数分别为0.5-1、0.05-0.3、0.1-1.5。The outer layer protective aqueous conductive coating for a hard rubber charging roller according to claim 1, wherein the aqueous auxiliary agent comprises a dispersing agent, an antifoaming agent and a leveling agent, wherein the parts by weight thereof are respectively It is 0.5-1, 0.05-0.3, 0.1-1.5.
  6. 根据权利要求5所述的用于硬质橡胶充电辊的外层保护水性导电涂料，其特征在于，所述分散剂为磷酸酯类分散剂、甲基丙烯酸二甲氨基乙酯或聚羧酸钠盐分散剂。The outer layer protective aqueous conductive paint for a hard rubber charging roller according to claim 5, wherein the dispersing agent is a phosphate dispersant, dimethylaminoethyl methacrylate or sodium polycarboxylate Salt dispersant.
  7. 根据权利要求5所述的用于硬质橡胶充电辊的外层保护水性导电涂料，其特征在于，所述消泡剂为矿物油类消泡剂、聚硅氧烷类消泡剂中的至少一种。The outer layer protective aqueous conductive paint for a hard rubber charging roller according to claim 5, wherein the antifoaming agent is at least one of a mineral oil type antifoaming agent and a silicone type antifoaming agent. One.
  8. 根据权利要求5所述的用于硬质橡胶充电辊的外层保护水性导电涂料，其特征在于，所述流平剂为丙烯酸类流平剂、有机硅类流平剂或氟碳化合物类流平剂。The outer layer protective aqueous conductive coating for a hard rubber charging roller according to claim 5, wherein the leveling agent is an acrylic leveling agent, a silicone leveling agent or a fluorocarbon type stream Flat agent.
  9. 根据权利要求1所述的用于硬质橡胶充电辊的外层保护水性导电涂料，其特征在于，所述电荷调整剂为季胺盐类的化合物。The outer layer protective aqueous conductive paint for a hard rubber charging roller according to claim 1, wherein the charge control agent is a compound of a quaternary ammonium salt.
PCT/CN2012/085022 2011-11-25 2012-11-22 Conductive aqueous coating for outer protection of hard rubber charging roll WO2013075638A1 (en)

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CN102424740A (en) * 2011-11-25 2012-04-25 珠海天威飞马打印耗材有限公司 Outer layer protective aqueous conductive coating for hard rubber charging roller
CN105505161A (en) * 2015-09-30 2016-04-20 无锡同创石墨烯应用科技有限公司 Graphite-modified water-based conductive coating composition and preparation method thereof
CN107057028A (en) * 2017-02-20 2017-08-18 深圳凯奇化工有限公司 A kind of water nano height covers 3D printing coating and preparation method thereof
CN110205007B (en) * 2019-04-30 2022-07-12 清远市绚淳环保新材料有限公司 Surface treatment coating for charging roller made of foaming material and preparation method thereof

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