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A kind of water-based antistatic coating and preparation method thereof

An antistatic, water-based technology, applied in conductive coatings, polyurea/polyurethane coatings, coatings, etc., can solve problems such as poor solvent resistance, brittleness, and unfavorable environmental protection

Inactive Publication Date: 2015-11-04
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the shortcomings of acrylic resin, such as poor solvent resistance, brittleness at low temperature, and stickiness at high temperature, it is not conducive to the solvent resistance of the coating, and limits the use of antistatic coatings at high or low temperatures.
[0005] CN 101921540 and CN 101643549 respectively disclose a method for preparing an antistatic polyester film. In the invention, an antistatic coating composed of polythiophene conductive polymer, water-based polyurethane resin and curing agents such as isocyanate, melamine, and oxazolidine is used. In order to achieve A certain curing effect, the use of toxic curing agents such as isocyanate is relatively large, which is not conducive to environmental protection

Method used

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  • A kind of water-based antistatic coating and preparation method thereof
  • A kind of water-based antistatic coating and preparation method thereof
  • A kind of water-based antistatic coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Embodiment 1. prepares the aqueous solution of carboxylated aqueous conductive polymer system

[0074] The aqueous solution of the carboxylated waterborne conductive polymer system P3TCa / DBSA whose solid content is 0.5wt% is prepared:

[0075] Step 1): Dissolving 0.25g DBSA in 49.75mL deionized water to obtain a DBSA aqueous solution with a concentration of 0.5wt%;

[0076] Step 2): Add 0.125g 3TCa to the DBSA aqueous solution obtained in step 1), and stir evenly to obtain a DBSA aqueous solution dispersed with 3TCa, wherein the concentration of 3TCa is 0.25wt%;

[0077] Step 3): Add 0.5 g of ferric sulfate to the DBSA aqueous solution dispersed with 3TCa obtained in step 2), and react for 48 hours to obtain the initial product system;

[0078] Step 4): Add 17.5g 201*7 type anion exchange resin to the initial product system obtained in step 3), after soaking for 10 minutes, remove the anion exchange resin by suction filtration, then add 16g 001*7 type cation exchange r...

Embodiment 2

[0144] Embodiment 2. prepares the aqueous solution of the aqueous conductive polymer system PEDOT / PSS not containing carboxyl group

[0145] Step 1): Dissolving 0.75g PSS (weight average molecular weight 500000) in 49.25mL deionized water to obtain a PSS aqueous solution with a concentration of 1.5wt%;

[0146] Step 2): Add 0.25g EDOT to the PSS aqueous solution obtained in step 1), and stir evenly to obtain a PSS aqueous solution with EDOT dispersed, wherein the concentration of EDOT in the PSS aqueous solution with EDOT dispersed is 0.5wt%;

[0147] Step 3): Add 1.25 g of sodium persulfate to the PSS aqueous solution dispersed with EDOT obtained in step 2), and react for 24 hours to obtain the initial product system;

[0148] Step 4): Add 25g 201*7 type anion exchange resin to the initial product system obtained in step 3), after soaking for 5 hours, remove the anion exchange resin by suction filtration, then add 25g 001*7 type cation exchange resin to the filtrate, After s...

Embodiment 3

[0149] Embodiment 3. prepare the aqueous solution of carboxylation waterborne polyurethane resin

[0150] Preparation weight average molecular weight is the aqueous solution of the carboxylated waterborne polyurethane resin of 10000:

[0151] Step 1): Under the protection of dry nitrogen, 13 g of dimethylol propionic acid was dissolved in 30 mL of N-methylpyrrolidone to obtain a dimethylol propionic acid solution;

[0152] Step 2): add 52g Polyethylene Glycol (weight average molecular weight 600) in the dimethylolpropionic acid solution that step 1) obtains, after stirring, then add 65g isophorone diisocyanate in above-mentioned system, in Constant temperature reaction at 80°C for 1 hour;

[0153] Step 3): Lower the temperature to 50° C., slowly add 6.5 g of tripropylamine dropwise to the system obtained in step 2), and continue the reaction for 1 hour;

[0154] Step 4): Cool to room temperature, add 163 mL of acetone to the system obtained in step 3), stir evenly, then add ...

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Abstract

The invention relates to a waterborne antistatic coating and preparation method thereof. The method comprises the following steps: slowly adding the water solution of carboxylated waterborne polyurethane resin in a water solution of a carboxylated waterborne conductive polymer system, uniformly stirring, adding a polyfunctional aziridine compound, stirring to uniformly mix the components to obtain the waterborne antistatic coating, wherein the content of the carboxylated waterborne conductive polymer system in the waterborne antistatic coating is 0.1-2.5wt%, the content of the carboxylated waterborne polyurethane resin is 2-28wt%, the content of the polyfunctional aziridine compound is 0.1-3wt%, and the rest is water. The waterborne antistatic coating is tightly combined with the surfaces of substrates such as plastic, glass, wood, round and the wall to form the antistatic paintcoat with good antistatic effect, good water resistance and alcohol resistance; the antistatic coating can be widely applied to the fields of film negative film package, electron component package, display protective film and electromagnetic shielding.

Description

technical field [0001] The invention belongs to the field of antistatic materials, and relates to a water-based antistatic coating and a preparation method thereof, in particular to a carboxylated water-based conductive polymer system as a conductive substance including a carboxylated water-based conductive polymer system, a carboxylated water-based polyurethane resin and a water-based antistatic coating. Waterborne antistatic coating of polyfunctional aziridine compounds. Background technique [0002] In recent years, conductive polymers have attracted great attention due to their excellent electrical and optical properties, among which polyaniline, polypyrrole and polythiophene are the most notable. Polyaniline is easy to prepare at low cost and mass-produced. However, the molecule has a benzidine structure, which will produce toxic substances during the degradation process. In contrast, polypyrrole and polythiophene are environmentally friendly, but they have the disadva...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D165/00C09D5/24C09D7/12
Inventor 周树云张铭严峻肖时卓孙承华胡秀杰陈萍
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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