Nano dispersed water-based conductive primer for vehicle bumper and preparation method thereof

A nano-dispersion technology for automobile bumpers, applied in conductive coatings, biocide-containing paints, anti-fouling/underwater coatings, etc., to achieve the effect of small addition

Active Publication Date: 2011-04-06
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still no patents and reports on the use of water-based conductive polymers as conductive additives for the preparation of water-based primers for automobile bumpers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1: Preparation of chlorinated polypropylene modified polyurethane anionic water-based resin

[0040]By mol ratio, the molecular weight 40000 Daltons of 2.1mol toluene, 0.002mol, contain the chlorinated polypropylene of 20% chlorine weight percentage, 0.44mol hydroxyethyl acrylate and 0.03mol benzoyl peroxide, at reaction temperature React for 3 hours at 105°C; then add 2.2mol of 2,4-xylene diisocyanate, 0.25mol of polybutylene adipate diol with a molecular weight of 2000 Daltons, 0.95mol of dimethylol propionic acid and 0.0004mol dibutyltin silicate catalyst, reacted at 80°C for 2.5 hours; then added 0.48mol trimethylolpropane, reacted at 82°C for 2 hours; added 0.8mol triethylamine pH regulator at 40°C, reacted for 15min, Add 58.9 mol of water, emulsify at 1500rpm for 30min, remove toluene under reduced pressure, and discharge to obtain chlorinated polypropylene modified polyurethane water-based resin with 41% solid content.

Embodiment 2

[0041] Embodiment 2: Preparation of chlorinated polypropylene modified polyurethane anionic water-based resin

[0042] By mol ratio, 2mol toluene, 0.003mol chlorinated polypropylene (molecular weight 10000 Daltons, containing 10% chlorine weight percentage), 0.46mol hydroxyethyl acrylate and 0.04mol benzoyl peroxide, at a reaction temperature of 105 ℃ for 3.5 hours; then add 2.4 mol of 2,4-xylene diisocyanate, 0.3 mol polybutylene succinate diol (molecular weight 2000 Daltons), 1 mol dimethylol butyric acid and 0.0005 mol di Dibutyltin lauricate catalyst, react at 80°C for 2.5 hours; then add 0.5mol trimethylolpropane, react at 82°C for 2 hours; add 0.9mol dimethylethanolamine pH regulator at 40°C, react for 15min, add 117.2 mol of water was emulsified at 1500 rpm for 30 minutes; the toluene was removed under reduced pressure, and the material was discharged to obtain a chlorinated polypropylene modified polyurethane water-based resin with a solid content of 40%.

Embodiment 3

[0043] Embodiment 3: Preparation of chlorinated polypropylene modified polyurethane cationic water-based resin

[0044] By mol ratio, 2.5mol toluene, 0.001mol chlorinated polypropylene (molecular weight 150000 Daltons, chlorine-containing weight percentage composition 40%), 0.38mol hydroxyethyl acrylate and 0.01mol benzoyl peroxide, the reaction temperature is 110 ° C reaction for 2.5 hours; then add 1.8 mol of isophorone diisocyanate, 0.1 mol of polyethylene adipate diol (molecular weight 2000 Daltons), 0.8 mol of N-methyldiethanolamine and 0.0002 mol February dibutyltin silicate catalyst, react at 80°C for 2.5 hours; then add 0.4mol trimethylolpropane, react at 85°C for 2 hours; add 0.6mol glycolic acid pH regulator at 45°C, react for 20min, add 82.5mol Water was emulsified at 2000 rpm for 30 minutes; the toluene was removed under reduced pressure, and the material was discharged to obtain a chlorinated polypropylene modified polyurethane water-based resin with a solid conte...

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Abstract

The invention provides a nano dispersed water-based conductive primer for a vehicle bumper and a preparation method thereof. The nano dispersed water-based conductive primer for the vehicle bumper is prepared by using water-based conductive polyaniline and a water-based conductive polymer of poly-3,4-ethylene dioxide thiophene-polystyrene sulfonate as conductive mediums and using CPP (Chlorinatedpolypropylene) modified polyurethane water-based resin as forming resin. The nano dispersed water-based conductive primer for the vehicle bumper can reach the conductance requirement even if less water-based conductive primer which is 1.3-14.2 percent in parts by weight of the total solid of the primer is added. The nano dispersed water-based conductive primer is nano dispersed water-based paint containing no harmful substances, such as toluene, xylene, and the like, thereby causing no pollution to the environment and being an environmental-friendly product.

Description

technical field [0001] The invention belongs to nano-dispersed water-based primer for automobile bumpers and a preparation method thereof. technical background [0002] Automobile bumpers are usually plastic substrates such as polypropylene modified by EPDM rubber. The surface coating generally adopts electrostatic spraying process, because this method can increase the utilization rate of paint by 25% compared with traditional air spraying. ~ 40%, thereby effectively reducing the consumption of coatings, reducing production costs, and at the same time reducing environmental pollution caused by automotive coating production. However, the surface resistance of automobile bumper plastic parts is usually about 10 12 ~10 16 Ω / sq, the topcoat cannot be applied directly to the plastic surface by electrostatic coating. Therefore, a layer of conductive primer is usually applied to the surface of the plastic substrate to endow the substrate with conductivity and make its surface re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/06C09D179/02C09D187/00C09D5/24C09D5/14C08G18/42C08G18/63C08F255/02
Inventor 张红明李季王献红王佛松
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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