Antistatic waterborne polyurethane coating and preparation method thereof
A water-based coating and antistatic technology, applied in polyurea/polyurethane coatings, conductive coatings, coatings, etc., can solve the problems of high cost, environmental protection, and complicated methods of single carbon nanotube conductive fillers, and achieve antistatic performance reduction , small amount of addition, simple operation process
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[0016] Example 1:
[0017] 1. Put 1.5 parts of carbon nanotubes into concentrated H 2 SO 4 And HNO 3 In the mixed solution (volume ratio 3:1), treated for 2.5h under the action of ultrasonic vibration and mechanical stirring, and then washed with a large amount of deionized water to neutrality.
[0018] 2. Add 45 parts of aqueous hydroxyl-containing acrylic dispersion (Bayhydrol XP series 2457) into the cone mill, add 1.0 part of carbon nanotubes obtained in step 1 under medium speed grinding, 0.2 part of conductive carbon black, and 0.1 part of wetting agent , 0.03 parts defoamer, 0.2 parts leveling agent, 15 parts water, disperse for 20 minutes.
[0019] 3. Add 16 parts of hydrophilic aliphatic polyisocyanate (Bayhydur XP series 2451) and disperse for 10 minutes to obtain a waterborne polyurethane antistatic coating containing carbon nanotubes.
Example Embodiment
[0020] Example 2:
[0021] 1. Put 2.0 parts of carbon nanotubes into concentrated H 2 SO 4 And HNO 3 In the mixed solution (volume ratio of 3:1), treated with ultrasonic vibration and mechanical stirring for 4h, and then washed with a large amount of deionized water to neutrality.
[0022] 2. Add 50 parts of aqueous hydroxyl-containing acrylic dispersion (Bayhydrol XP series 2470) into the cone mill, add 2.0 parts of carbon nanotubes obtained in step 1 under medium speed grinding, 0.3 parts of conductive carbon black, and 0.15 parts of wetting agent , 0.02 parts defoamer, 0.1 parts leveling agent, 17 parts water, 25 minutes dispersion.
[0023] 3. Add 17 parts of hydrophilic aliphatic polyisocyanate (Bayhydur XP series 2547) and disperse for 10 minutes to obtain a waterborne polyurethane antistatic coating containing carbon nanotubes.
Example Embodiment
[0024] Example 3:
[0025] 1. Put 4.0 parts of carbon nanotubes into concentrated H 2 SO 4 And HNO 3 In the mixed solution (volume ratio of 3:1), under the action of ultrasonic vibration and mechanical stirring, treat for 5h, and then wash with a large amount of deionized water to neutrality.
[0026] 2. Add 48 parts of aqueous hydroxyl-containing acrylic dispersion (Bayhydrol XP series 2546) into the cone mill, add 4.0 parts of carbon nanotubes obtained in step 1 under medium speed grinding, 0.5 parts of conductive carbon black, and 0.3 parts of wetting agent , 0.05 parts defoamer, 0.5 parts leveling agent, 20 parts water, dispersed for 30 minutes.
[0027] 3. Add 20 parts of hydrophilic aliphatic polyisocyanate (Bayhydur XP series 2451) and disperse for 20 minutes to obtain a waterborne polyurethane antistatic coating containing carbon nanotubes.
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