CN103102789B - Water-borne non-ionic polyurethane antistatic coating and preparation method and application thereof - Google Patents
Water-borne non-ionic polyurethane antistatic coating and preparation method and application thereof Download PDFInfo
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Abstract
The invention provides a water-borne non-ionic polyurethane antistatic coating. The water-borne non-ionic antistatic polyurethane coating is prepared from the following components in weight percent (wt%): 50-95wt% of water-borne non-ionic polyurethane emulsion, 3.5-30 wt% of conductive carbon black, 0.5-10wt% of water-borne antistatic agent and 1-10wt% of additives. A preparation method of the water-borne non-ionic polyurethane antistatic coating comprises the following steps: adding isocyanate and a polyol into a reactor in sequence, stirring to make the isocyanate and the polyol react to generate an isocyanate prepolymer, adding a non-ionic hydrophilic chain extender and a low-boiling-point solvent to extend chains to obtain polyurethane solution, emulsifying under the action of high-speed shear force, removing the low-boiling-point solvent in vacuum to obtain water-borne non-ionic polyurethane emulsion, adding the conductive carbon black, the water-borne antistatic agent and the additives, stirring and mixing at a low speed to obtain water-borne non-ionic polyurethane antistatic solution, spraying the water-borne non-ionic polyurethane antistatic solution onto the surface of a product needing to the coated, and baking. The water-borne non-ionic polyurethane antistatic coating prepared by adopting the preparation method has excellent performances, can be stored stably, can be adjusted in the electric quantity and the spraying amount flexibly and can be applied to printers and other electronic photographic equipment.
Description
[technical field]
The present invention relates to a kind of printer Material Field, be specifically related to a kind of can with ink powder triboelectrification aqueous polyurethane coating completing development and preparation method thereof, be applied in electrofax and printer developer roll.
[background technology]
Aqueous polyurethane is nontoxic, pollution-free, and simultaneously quite, therefore the research and development of aqueous polyurethane are subject to the most attention of countries in the world for the performance such as hardness, gloss, cohesiveness and solvent borne polyurethane.At present, in aqueous polyurethane, the research that nonionic polyaminoester emulsion is compared in the research of carboxylate anion's type polyurethane emulsion is more.
In printer electronics photographic system, constantly rub between dependence developer roll and toning agent, electrify, thus the process completing development and print.Investigate the print quality of printer, usually adopt the carried charge Q/M of unit mass ink powder and the upper powder amount M/A of unit surface to weigh.In printer work, frictional electrification makes Xeroxing be achieved, if but electrostatic in print procedure is too high, then can to printer even human body bring harm.Therefore, in electronic imaging developing technique, usually need to add static inhibitor.
Static inhibitor is separated out at coatingsurface, is combined and forms conductive channel, electric charge can be removed from coatingsurface soon with moisture in air, thus obtains antistatic effect.Cationic antistatic agent, especially quaternary ammonium salt static inhibitor, due to the antistatic property that it is excellent, enjoy favor in polyurethane industries among others.Operable static inhibitor in current aqueous polyurethane emulsion, also mainly quaternary ammonium salt static inhibitor.
Conventional aqueous anionic polyurethane emulsion, because its side chain has the hydrophilic group such as carboxyl, sulfonic group, makes emulsion cannot be blended with quaternary ammonium salt static inhibitor.When stirring at low speed, add quaternary ammonium salt static inhibitor and usually make aqueous anionic polyurethane emulsion breaking.Even added in polyvalent alcohol by static inhibitor in building-up process, then preparing aqueous anionic polyurethane with isocyanate reaction, also can produce demulsifying phenomenon when adding 1wt% quaternary ammonium salt static inhibitor.Technical difficulty makes aqueous anionic polyurethane emulsion, is difficult to use in that processability is excellent, the aqueous antistatic coating of stable storing.
Chinese patent literature CN 102432992 A discloses the method using polyvalent alcohol, isocyanic ester, chainextender etc. to prepare non-ionic water polyurethane emulsion.The method can prepare non-ionic water polyurethane emulsion, but does not have good triboelectric behavior.
Another part of Chinese patent literature CN98120882.7 discloses a kind of electrophotographic developer, and it has lower frictional electrification Q/M numerical value, but this photographic developer is oily matter, is only suitable for oleoresin and uses.
The technology provided in above-mentioned data, all cannot meet and have good physical behavior and triboelectric behavior concurrently required by field of waterborne polyurethane, thus cannot meet the service requirements of printer and other electronic photographing devices.
[summary of the invention]
The object of the invention is to overcome above-mentioned prior art defect, provide a kind of excellent property, stable storing, can the water-based non-ionic polyurethane antistatic coating of flexible carried charge Q/M and upper powder amount M/A.
Water-based non-ionic polyurethane antistatic coating technical scheme provided by the invention comprises the component of following weight per-cent:
Water-based non-ionic polyurethane emulsion 50-95wt%, graphitized carbon black 3.5-30wt%, aqueous antistatic agent 0.5-10wt%, auxiliary agent 1-10wt%; Preferred water-based non-ionic polyurethane emulsion 70-93.5wt%, graphitized carbon black 5-20wt%, aqueous antistatic agent 0.5-5wt%, auxiliary agent 1-5wt%; Wherein,
Nano-scale water carbon black dispersion liquid selected by described graphitized carbon black;
Described water-based non-ionic polyurethane emulsion is reacted by hydroxyl polyol, isocyanic ester, small molecule chain extender and non-ionic hydrophilic chainextender to generate;
Described aqueous antistatic agent is water soluble quaternary ammonium salt static inhibitor.
Present invention also offers a kind of method preparing above-mentioned water-based non-ionic polyurethane antistatic coating, comprise the following steps:
(1) water-based non-ionic polyurethane emulsion is prepared:
In reactor, add 20 ~ 40% isocyanic ester and 50 ~ 70% hydroxyl polyols successively, stirring reaction 1-3 hour under 80-100 DEG C of condition, obtains Isocyanate prepolymers body;
The Isocyanate prepolymers body that above-mentioned steps is obtained is cooled to 45-55 DEG C, and the low boiling point solvent adding 5 ~ 15% non-ionic hydrophilic chainextenders and 5 ~ 15% small molecule chain extenders and said mixture total amount 30 ~ 100% carries out chain extension, obtains polyurethane solution;
Make polyurethane solution in containing the water of salt forming agent, carry out emulsification under high shear effect, under vacuum, remove low boiling point solvent, obtain water-based non-ionic polyurethane emulsion;
(2) water-based non-ionic polyurethane liquid antistatic is prepared:
In the water-based non-ionic polyurethane emulsion that step (1) is obtained, add graphitized carbon black, aqueous antistatic agent and auxiliary agent in proportion, and be uniformly mixed under low stirring velocity;
(3) antistatic coating is prepared:
The water-based non-ionic polyurethane liquid that step (2) is obtained is sprayed at the product subsurface that need apply processing, is then positioned in 120-130 DEG C of baking oven and toasts 0.5-2 hour, namely obtain water-based non-ionic polyurethane antistatic coating.
Coating prepared by water-based non-ionic polyurethane antistatic coating described above and preparation method can be applicable in printer and other electronic photographing devices.
Compared with prior art, water-based non-ionic polyurethane antistatic coating provided by the invention has following characteristics:
1) the present invention uses waterborne polyurethane resin for non-ionic water polyurethane resin, owing to not containing ionic group, namely can mix with arbitrary proportion with static inhibitor under the condition of stirring at low speed, and then can antistatic coating be prepared, and there is good triboelectric behavior;
2) static inhibitor that the present invention uses is polyurethanes static inhibitor conventional in urethane, and can use common commercially available product, cost is low, easily obtains.
3) conductive filler material that the present invention uses is adopted as nano-scale water carbon black dispersion liquid, has good electroconductibility and water dispersible.
Non-ionic polyurethane antistatic coating prepared by the present invention, have stable, powder amount M/A in adjustable friction belt electricity Q/M and stable unit surface, not only solve in prior art the problem cannot prepared containing quaternary ammonium salt static inhibitor aqueous polyurethane, and can join in waterborne polyurethane resin under stirring at low speed, preparation is simple, overcome in prior art the singularity of anion polyurethane production and the defect of high cost with antistatic property, the addition flexibility and changeability of static inhibitor, have broad application prospects in printer and other electronic photographing devices.
[accompanying drawing explanation]
Fig. 1 is the preparation technology figure of aqueous polyurethane coating of the present invention.
Fig. 2 is antistatic developer roll structural representation prepared by the present invention.
[embodiment]
For realizing the object of the invention, below in conjunction with drawings and Examples, the present invention is described in further detail.Should be appreciated that specific embodiment described herein, only for explaining the present invention, being not intended to limit the present invention.
The invention provides a kind of water-based non-ionic polyurethane antistatic coating, comprise the component of following weight per-cent:
Water-based non-ionic polyurethane emulsion 50-95wt%, graphitized carbon black 3.5-30wt%, aqueous antistatic agent 0.5-10wt%, auxiliary agent 1-10wt%.
The weight percent preferable range of above-mentioned each component is: water-based non-ionic polyurethane emulsion 70-95wt%, graphitized carbon black 5-20wt%, aqueous antistatic agent 0.5-5wt%, auxiliary agent 1-5wt%.
In said components:
Described water-based non-ionic polyurethane emulsion is reacted by 20 ~ 40% isocyanic ester, 50 ~ 70% hydroxyl polyols, 5 ~ 15% non-ionic hydrophilic chainextenders and 5 ~ 15% small molecule chain extenders to generate.Wherein,
Described isocyanate is aliphatic isocyanates or aromatic isocyanate, and preferred aliphat isocyanic ester can select isophorone diisocyanate, hexamethylene diisocyanate, tolylene diisocyanate or diphenylmethanediisocyanate.Described aromatic isocyanate is owing to containing phenyl ring, oxygen reaction easily and in air generates quinoid structure, i.e. so-called xanthochromia, so in the preparation and use procedure of aromatic isocyanate coating, easily there is xanthochromia in coating, thus causes the outward appearance of coating and the change of mechanical property---weathering resistance and photostabilization poor; Described aliphatic isocyanates owing to not having unsaturated link(age), thus has good weathering resistance and photostabilization.Current high-grade water-borne coatings generally all uses aliphatic isocyanates.
Described hydroxyl polyol is non-ionic water-soluble polyvalent alcohol, preferably water dissolubility Polyoxyethylene glycol.Select non-ionic water-soluble polyvalent alcohol, can make aqueous polyurethane can utilize when emulsification polyvalent alcohol self with hydroxyl carry out emulsification, form stable emulsion, thus do not need outer interpolation emulsifying agent.If chainextender only uses general water-fast polyvalent alcohol to carry out emulsification, then need outer interpolation emulsifying agent, system could carry out emulsification smoothly, and the emulsifying agent added outward due to molecular weight smaller, can not be connected on polyurethane molecular chain, thus greatly reduce polyurethane coating performance.
Described small molecule chain extender can select glycol ether, 1,4-butyleneglycol or ethylene glycol, this is conventional chain extender, polyurethane coating is made to have a kind of block copolymerization type macromolecular compound formed with hard section by soft section after chain extension, give the performances such as product flexibility, rebound resilience and flexibility for soft section, hard section gives mechanical property and the chemical-resistant of product excellence.
Described non-ionic hydrophilic chainextender selects trolamine, dimethythiotoluene diamine and diethyl toluene diamine etc.Amine chain extender speed of reaction is higher, and reduce the reaction times, reaction can not add catalyzer; Amine chain extender has excellent moisture resistance air-sensitive perception simultaneously, easily prepares the coating of better performances.
Described graphitized carbon black is water nano level carbon black dispersion liquid, there is good electroconductibility and dispersiveness, obtained through grinding distribution by the graphitized carbon black, wetting agent, dispersion agent etc. with high structure, its concrete preparation method can see patent CN201110444681.7.
Described aqueous antistatic agent adopts quaternary ammonium compound, can use common commercially available product, the HK-PU-4 etc. of the Catafor F of such as Rhodia, Nantong ancient cooking vessel and novel material Science and Technology Ltd. TW-19A, Shanghai Ka Jite Chemical Industry Science Co., Ltd.
Described auxiliary agent comprises wetting agent, flow agent, and silane coupling agent etc. added as required.Wherein aqueous wetting agent selects Siloxane-Oxyalkylene Copolymers (the high company 245 of Germany), and water-based flow agent selects Siloxane-Oxyalkylene Copolymers (the high company 440 of Germany), and silane coupling agent selects KH550, KH560, KH570 etc.
Applicant finds through lot of experiments, owing to containing the electronegative negatively charged ion such as carboxyl, sulfonic group in common anion polyurethane water-base resin, can not coexist, so cannot prepare antistatic aqueous anionic polyurethane coating with quaternary ammonium salt static inhibitor.The present invention is different from the anion polyurethane water-base resin used in prior art, by using waterborne polyurethane resin to be non-ionic water polyurethane resin, namely water-based non-ionic polyurethane emulsion is adopted to be filmogen, help that there is good electroconductibility and dispersed water nano level carbon black dispersion liquid simultaneously, and be aided with aqueous antistatic agent and auxiliary agent, just can obtain the water-based non-ionic polyurethane antistatic coating that performance is very excellent.Owing to not containing ionic group, namely can be blended with quaternary ammonium salt static inhibitor under the condition of stirring at low speed, it had both had the mechanical property suitable with anion aqueous polyurethane emulsion, stable storing, also there is the good friction charging property (Q/M and M/A numerical value is lower and stable) not available for anion aqueous polyurethane emulsion simultaneously, can flexible carried charge Q/M and upper powder amount M/A and preparation technology requires and equipment cost is also significantly less than the production technique adopting anion polyurethane.
See Fig. 1, the invention provides the preparation method of above-mentioned water-based non-ionic polyurethane antistatic coating, comprise the steps:
(1) water-based non-ionic polyurethane emulsion is prepared:
In reactor, add 20 ~ 40% isocyanic ester and 50 ~ 70% polyvalent alcohols successively, within stirring reaction 1-3 hour under 80-100 DEG C of condition, obtain Isocyanate prepolymers body;
Obtained Isocyanate prepolymers body is cooled to 45-55 DEG C, and the low boiling point solvent then adding 5 ~ 15% non-ionic hydrophilic chainextenders, 5 ~ 15% small molecule chain extenders and said mixture total amount 30 ~ 100% carries out chain extension, obtains polyurethane solution;
In containing the water (concentration 1%) of salt forming agent, carry out emulsification through high speed shear, vacuum sloughs low boiling point solvent, namely obtains water-based non-ionic polyurethane emulsion.
(2) water-based non-ionic polyurethane liquid antistatic is prepared:
The water-based non-ionic polyurethane emulsion 50-95wt% of step (1) gained is mixed with graphitized carbon black 3.5-30wt%, aqueous quaternary ammonium salt static inhibitor 0.5-10wt% and auxiliary agent 1-10wt% under lower stirring velocity (80-400r/min), namely forms water-based non-ionic polyurethane liquid antistatic;
(3) antistatic coating is prepared:
By the water-based non-ionic polyurethane liquid antistatic of step (2) gained, use spraying machine under certain spraying rate, be sprayed at the rubber surface that need apply, then be positioned in 130 DEG C of baking ovens and toast 0.5-2 hour, both obtained the coating with antistatic effect.Water-based non-ionic polyurethane antistatic coating prepared by the present invention, its static inhibitor can when stirring at low speed and resin mix with arbitrary proportion, having can the feature of accommodation zone electricity Q/M and upper powder amount M/A flexibly, overcomes the high property of singularity that the anion polyurethane with antistatic property produces and cost.Simultaneously preparation technology of the present invention is relatively simple, and institute adopts cost of material cheaply, and tooling cost is low, and the water-based non-ionic polyurethane antistatic coating mechanical property of preparation is good, has good use value marketable value.
The water-based non-ionic polyurethane antistatic coating adopting above-mentioned preparation technology to obtain, developer roll service requirements in printer and other electronic photographing devices can be met, can be well used in printer and other electronic photographing devices, and can continuous industrial production.
Fig. 2 shows a kind of structure of antistatic developer roll, comprises the elastic rubber layer 2 of metal shaft core 1, metal shaft core 1 outer cladding, described rubber layer 2 is coated with the coating 3 of above-mentioned antistatic effect.Like this, developer roll tool good physical behavior and triboelectric behavior can be made, effectively improve the quality of developer roll.
Below in conjunction with specific embodiment, preparation method of the present invention is described in further detail.
Embodiment 1:
(1) water-based non-ionic polyurethane emulsion is prepared:
In reactor, add 23.0g tolylene diisocyanate and the water-soluble Polyoxyethylene glycol 2000 of 67.5g of metering successively, within stirring reaction 1-3 hour under 80-100 DEG C of condition, obtain Isocyanate prepolymers body; Be cooled to about 45 DEG C, add 3.7g glycol ether, 5.8g trolamine and proper amount of acetone and carry out chain extension, obtain polyurethane solution; In containing the water of salt forming agent, carry out emulsification through high speed shear, vacuum sloughs low boiling point solvent, finally obtains water-based non-ionic polyurethane emulsion.
(2) water-based non-ionic polyurethane liquid antistatic is prepared:
In the water-based non-ionic polyurethane emulsion of step (1) gained, under lower stirring velocity, add 10wt% graphitized carbon black, 5wt% aqueous quaternary ammonium salt static inhibitor, 1wt ‰ wetting agent BYK 344,1wt ‰ flow agent TEGO410, i.e. obtained water-based non-ionic polyurethane liquid antistatic.
(3) developer roll antistatic coating is prepared
By the water-based non-ionic polyurethane liquid antistatic of step (2) gained, use spraying machine, 0.20g is sprayed in the rubber surface manufacturing developer roll under the speed of 800 revs/min, then be positioned in 130 DEG C of baking ovens and toast 0.5-2 hour, taking-up to be placed in normal temperature after 4 hours, be installed in the corresponding printer of rubber roll and print, and use Q/M tester and ten thousand/balance to carry out powder amount M/A in friction belt electricity Q/M and stable unit surface to test.
Obtained non-ionic polyurethane antistatic coating, has powder amount M/A in stable friction belt electricity Q/M and stable unit surface, meets developer roll service requirements in printer and other electronic photographing devices, specifically in table 1.
Embodiment 2:
(1) water-based non-ionic polyurethane emulsion is prepared:
In reactor, add 35.0g isophorone diisocyanate and the water-soluble Polyoxyethylene glycol 1000 of 57.2g of metering successively, within stirring reaction 1-3 hour under 80-100 DEG C of condition, obtain Isocyanate prepolymers body; Be cooled to about 50 DEG C, add 4.8g glycol ether, 3.0g trolamine and proper amount of acetone and carry out chain extension, obtain polyurethane solution; High speed shear carries out emulsification in containing the water of salt forming agent, and vacuum sloughs low boiling point solvent, finally obtains water-based non-ionic polyurethane emulsion.
Step (2) and step (3) are with embodiment 1, and concrete test data is in table 1.
Embodiment 3:
(1) water-based non-ionic polyurethane emulsion is prepared:
In reactor, add 22.6g hexamethylene diisocyanate and the water-soluble Polyoxyethylene glycol 2000 of 69.0g of metering successively, within stirring reaction 1-3 hour under 80-100 DEG C of condition, obtain Isocyanate prepolymers body; Be cooled to about 55 DEG C, add 4.2g glycol ether, 3.9g trolamine and proper amount of acetone and carry out chain extension, obtain polyurethane solution; High speed shear carries out emulsification in containing the water of salt forming agent, and vacuum sloughs low boiling point solvent, finally obtains water-based non-ionic polyurethane emulsion.
Step (2) and step (3) are with embodiment 1, and concrete test data is in table 1.
Comparative example 1:
(1) aqueous anionic polyurethane emulsion is prepared:
Use aqueous anionic polyurethane resin B ayhyol XP 2655 emulsion of hardness and embodiment 1-3 same rigidity.
(2) water-based non-ionic polyurethane antistatic coating is prepared:
In hydrotropisms's anionic polyurethane resin, stir and add 10wt% graphitized carbon black, 1wt ‰ wetting agent BYK 344,1wt ‰ flow agent TEGO 410.
Step (3) is with embodiment 1, and concrete test data is in table 1.
Table 1
Note: powder amount M/A testing tool in friction belt electricity Q/M and stable unit surface: TREK MODEL212HS Q/M METER and ten thousand/balance.
From table 1, embodiment of the present invention 1-3 has good mechanical property and triboelectric behavior: have the mechanical property compared favourably with anion aqueous polyurethane emulsion, also have the good friction charging property not available for anion aqueous polyurethane emulsion, Q/M and M/A numerical value is lower and stable simultaneously.And adopt the comparative example 1 of coating prepared by ordinary method, although have good physicals, but Q/M and M/A numerical value is very high, and this type of anion polyurethane water-based emulsion cannot use common quaternary ammonium salt static inhibitor to reduce Q/M and M/A, thus cannot meet high-grade demand printer.
Can see through the above test about performance and printing test on a printer, water-based non-ionic polyurethane developer roll coating prepared by the present invention, there is powder amount M/A in stable friction belt electricity Q/M and stable unit surface, no matter in conventionally test projects such as hardness, ethanol-tolerant wiping, printings, or in Q/M and M/A, all reach the product requirement of excellent developer roll coating, developer roll service requirements in printer and other electronic photographing devices can be met completely.
The above embodiment only have expressed the preferred embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (9)
1. a water-based non-ionic polyurethane antistatic coating, is characterized in that, comprises the component of following weight per-cent:
Water-based non-ionic polyurethane emulsion 50-95wt%, graphitized carbon black 3.5-30wt%, aqueous antistatic agent 0.5-10wt%, auxiliary agent 1-10wt%; Wherein,
Nano-scale water carbon black dispersion liquid selected by described graphitized carbon black;
Described water-based non-ionic polyurethane emulsion is reacted by hydroxyl polyol, isocyanic ester, small molecule chain extender and non-ionic hydrophilic chainextender to generate;
Described aqueous antistatic agent is water soluble quaternary ammonium salt static inhibitor.
2. water-based non-ionic polyurethane antistatic coating according to claim 1, it is characterized in that, the weight percent numerical value preferable range of described coating ingredients is: water-based non-ionic polyurethane emulsion 70-93.5wt%, graphitized carbon black 5-20wt%, aqueous antistatic agent 0.5-5wt%, auxiliary agent 1-5wt%.
3. water-based non-ionic polyurethane antistatic coating according to claim 1, is characterized in that, described isocyanic ester is aliphatic isocyanates or aromatic isocyanate.
4. water-based non-ionic polyurethane antistatic coating according to claim 1, is characterized in that, described hydroxyl polyol is non-ionic water-soluble polyvalent alcohol.
5. water-based non-ionic polyurethane antistatic coating according to claim 1, it is characterized in that, described small molecule chain extender selects glycol ether, BDO or ethylene glycol.
6. water-based non-ionic polyurethane antistatic coating according to claim 1, is characterized in that, described non-ionic hydrophilic chainextender selects trolamine or linear polyethylene ethylene glycol bis function methyl ether.
7. the water-based non-ionic polyurethane antistatic coating according to any one of claim 1-6, is characterized in that, described auxiliary agent comprises wetting agent, flow agent or/and silane coupling agent.
8. a preparation method for the water-based non-ionic polyurethane antistatic coating as described in any one of claim 1-7, is characterized in that, comprise the following steps:
(1) water-based non-ionic polyurethane emulsion is prepared:
In reactor, add 20 ~ 40% isocyanic ester and 50 ~ 70% hydroxyl polyols successively, stirring reaction 1-3 hour under 80-100 DEG C of condition, obtains Isocyanate prepolymers body;
The Isocyanate prepolymers body that above-mentioned steps is obtained is cooled to 45-55 DEG C, and the low boiling point solvent adding 5 ~ 15% non-ionic hydrophilic chainextenders, 5 ~ 15% small molecule chain extenders and said mixture total amount 30 ~ 100% carries out chain extension, obtains polyurethane solution;
Make polyurethane solution in containing the water of salt forming agent, carry out emulsification under high shear effect, under vacuum, remove low boiling point solvent, obtain water-based non-ionic polyurethane emulsion;
(2) water-based non-ionic polyurethane liquid antistatic is prepared:
In the water-based non-ionic polyurethane emulsion that step (1) is obtained, add graphitized carbon black, aqueous antistatic agent and auxiliary agent in proportion, and be uniformly mixed under low stirring velocity;
(3) antistatic coating is prepared:
The water-based non-ionic polyurethane liquid that step (2) is obtained is sprayed at the product subsurface that need apply processing, is then positioned in 120-130 DEG C of baking oven and toasts 0.5-2 hour, namely obtain water-based non-ionic polyurethane antistatic coating.
9. the application of coating in printer and other electronic photographing devices prepared of a water-based non-ionic polyurethane antistatic coating as described in any one of claim 1-7 and water-based non-ionic polyurethane antistatic coating preparation method according to claim 8.
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| CN115678398A (en) * | 2021-07-30 | 2023-02-03 | 北京化工大学 | Antistatic waterborne polyurethane coating material and preparation method thereof |
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