Conducting primer for electrostatic coating of plastic base material and preparation method thereof

An electrostatic coating and substrate technology, used in conductive coatings, coatings, polyester coatings, etc., can solve the problem of inability to meet the requirements of single-component primers for canning and recycling, poor water resistance, heat resistance, heat shock resistance, and inability to Applicable to PP plastic parts and other problems, to achieve the effect of excellent matching, good adhesion, and excellent thermal shock resistance

Active Publication Date: 2012-12-26
湖南湘江关西涂料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The conductive primer has the following defects: 1) It uses a large amount (20-40%) of expensive conductive titanium dioxide pigments to achieve conductivity, and the cost is too high; 2) It is only suitable for medium and high polarity plastics such as ABS and PC, and is not suitable for widely used Low-polarity plastics such as PP, TPO, etc. are difficult to adhere to, especially not suitable for automotive PP plastic parts (such as bumpers, door s...

Method used

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  • Conducting primer for electrostatic coating of plastic base material and preparation method thereof
  • Conducting primer for electrostatic coating of plastic base material and preparation method thereof
  • Conducting primer for electrostatic coating of plastic base material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The conductive primer for electrostatic coating of plastic substrates of the present embodiment is made up of the following components by weight: thermoplastic acrylic resin (Deqian resin AC-7435) 6kg, polyester resin (modified hydrophobicity shown in table 1) Polyester resin A1) 8kg, epoxy resin (Wuxi Di Aisheng 850S) 0.8kg, mixed solvent 50kg (wherein containing toluene 25kg, xylene 10kg, methyl isobutyl ketone 15kg), pigment dispersant 0.42kg (Bike Chemical Disperbyk 161 is 0.12kg, Lubrizol SOLSPERSE hyperdispersant 32500 is 0.24kg, Lubrizol SOLSPERSE hyperdispersant 5000 is 0.06kg), rutile titanium dioxide pigment (U.S. DuPont R-706 titanium dioxide) 5kg, conductive carbon Black pigment (Evonik Degussa Printex XE2-B conductive carbon black) 1kg, fumed silica (Degosa-Hess AEROSILR972) 1kg, polyolefin resin (polyurethane modified chlorinated polyolefin resin shown in Table 2 B1) 15kg, leveling agent (organic silicon leveling agent, Shin-Etsu Chemical KP-327) 0.001kg, ...

Embodiment 2

[0054] The conductive primer for electrostatic coating of plastic substrates of this embodiment consists of the following components by weight: thermoplastic acrylic resin (Deqian resin AC-7435) 8kg, polyester resin (modified hydrophobicity shown in Table 1) Polyester resin A2) 10kg, epoxy resin (Wuxi Diaisheng 850S) 0.8kg, mixed solvent 52kg (including toluene 25kg, xylene 12kg, methyl isobutyl ketone 15kg), pigment dispersant 0.42kg (byk chemical Disperbyk 161 is 0.12kg, Lubrizol SOLSPERSE hyperdispersant 32500 is 0.24kg, Lubrizol SOLSPERSE hyperdispersant 5000 is 0.06kg), rutile titanium dioxide pigment (Kemeiji CR826) 5kg, conductive carbon black pigment (win Chuang Degussa Printex XE2-B conductive carbon black) 1kg, fumed silica (Degosa-Hess AEROSIL R972) 1kg, polyolefin resin (polyurethane modified chlorinated polyolefin resin B1 shown in Table 2) 11kg , leveling agent (Shin-Etsu Chemical KP-327) 0.001kg, defoamer (Japan Kusei Chemical OX-70) 0.01kg, high boiling point a...

Embodiment 3

[0062] The conductive primer for electrostatic coating of plastic substrates of the present embodiment is made up of the following components by weight: thermoplastic acrylic resin (Nengda Chemical AC2080M) 6kg, polyester resin (modified hydrophobic polyester shown in Table 1) Resin A1) 8kg, epoxy resin (Wuxi Diaisheng 850S) 0.8kg, mixed solvent 52kg (including toluene 25kg, xylene 12kg, methyl isobutyl ketone 15kg), pigment dispersant 0.42kg (Bick chemical Disperbyk 161 0.12kg, Lubrizol SOLSPERSE hyperdispersant 32500 is 0.24kg, Lubrizol SOLSPERSE hyperdispersant 5000 is 0.06kg), rutile titanium dioxide pigment (U.S. DuPont R-706 titanium dioxide) 5kg, conductive carbon black (card Bote VXC72R) 3kg, fumed silica (Di Gaosha-Hess AEROSIL R972) 1kg, polyolefin resin (polyurethane modified chlorinated polyolefin resin B2 shown in Table 2) 13kg, leveling agent (Shin-Etsu Chemical KP -327) 0.001kg, defoamer (Japan Kusei Kasei OX-70) 0.01kg, high boiling point aromatic hydrocarbon s...

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PUM

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Abstract

The invention discloses a conducting primer for electrostatic coating of a plastic base material and a preparation method thereof. The conducting primer comprises the following components in parts by weight: 5-10 parts of thermoplastic acrylic resin, 5-10 parts of polyester resin, 0.5-2 parts of epoxy resin, 40-60 parts of mixed solvent, 0-2 parts of pigment dispersing agent, 3-10 parts of rutile titanium dioxide pigment, 0.5-3 parts of conductive carbon black pigment, 0.5-2 parts of gas-phase silicon dioxide, 10-20 parts of polyolefin resin, 0-0.5 part of leveling agent, 0-0.5 part of defoaming agent and 5-15 parts of high-boiling-point aromatic hydrocarbon solvent. The invention also comprises the preparation method of the conducting primer for electrostatic coating of the plastic base material. The conducting primer disclosed by the invention has the advantages of good single-component stability, good adhesive force with multiple plastic base materials, good water resistance and humidity-heat resistance, excellent heat-shock resistance and lower cost.

Description

technical field [0001] The invention relates to a conductive primer and a preparation method thereof, in particular to a conductive primer for electrostatic coating of plastic substrates and a preparation method thereof. Background technique [0002] At present, non-conductive primers are widely used on plastic substrates in the market. The upper paint and varnish cannot be sprayed electrostatically, and can only be sprayed manually or automatically, resulting in a high amount of paint for the top coat, and for irregular workpieces, it will form Spray leaks and color inconsistencies. [0003] CN102277057A disclosed a conductive primer for electrostatic coating of plastic substrates and a preparation method thereof on December 14, 2011. The conductive primer consists of thermosetting acrylic resin, thermoplastic acrylic resin, conductive titanium white pigment, carbon black pigment, dispersed Agents, solvents, substrate wetting agents. The conductive primer has the followin...

Claims

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Application Information

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IPC IPC(8): C09D133/00C09D167/00C09D163/00C09D123/28C09D5/24C09D7/12
Inventor 黄翔黄立义胡杰平
Owner 湖南湘江关西涂料有限公司
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