CN112126323A - Electroplating-resistant powder coating and preparation method thereof - Google Patents
Electroplating-resistant powder coating and preparation method thereof Download PDFInfo
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- CN112126323A CN112126323A CN202011037904.3A CN202011037904A CN112126323A CN 112126323 A CN112126323 A CN 112126323A CN 202011037904 A CN202011037904 A CN 202011037904A CN 112126323 A CN112126323 A CN 112126323A
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- powder coating
- electroplating
- resistant powder
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/03—Powdery paints
- C09D5/033—Powdery paints characterised by the additives
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses an electroplating-resistant powder coating which comprises the following raw materials in parts by weight: 20-26 parts of polyethylene resin, 30-57 parts of polyester resin, 8-14 parts of curing agent, 15-30 parts of titanium dioxide and 12-16 parts of silicon powder. The invention also provides a preparation method of the electroplating-resistant powder coating. The electroplating-resistant powder coating provided by the invention has stronger electroplating resistance.
Description
Technical Field
The invention relates to the technical field of powder coatings, in particular to an electroplating-resistant powder coating and a preparation method thereof.
Background
High concentrations of nitric acid and phosphoric acid are generally used as the electroplating solution, and the common coating is difficult to bear the electroplating solution containing the high concentrations of nitric acid and phosphoric acid, can seriously discolor and lose the anticorrosion capability. Experiments show that the color difference can exceed 3.0 by primary electroplating, the color difference can even exceed 5.0 by secondary electroplating after deplating, and the adhesion can be reduced to be below grade 3. In addition, the salt spray performance is reduced after electroplating, and the neutral salt spray test is difficult to exceed 250 hours.
Therefore, there is a need for an electroplating-resistant powder coating and a preparation method thereof based on the prior art to solve the above problems.
Disclosure of Invention
In view of the above, the invention provides an electroplating-resistant powder coating and a preparation method thereof, and the wear resistance of the electroplating-resistant powder coating is greatly improved.
The invention provides an electroplating-resistant powder coating which comprises the following raw materials in parts by weight:
20-26 parts of polyethylene resin
30-57 parts of polyester resin
8-14 parts of curing agent
15-30 parts of titanium dioxide
12-16 parts of silicon powder.
Preferably, the curing agent is TGIC.
Preferably, the acid value of the polyester resin is in the range of 46-48MGKOH/G, the softening point is in the range of 120-125 ℃, and the glass transition temperature is more than 60 ℃.
The invention also provides a preparation method of the electroplating-resistant powder coating, which comprises the following steps:
uniformly mixing the raw materials, and crushing to 70-80 meshes;
adding the mixed material into a double-screw extruder, wherein the rotating speed of a screw is 150-;
adding the melt extrusion into a tablet press, and cooling in a nitrogen atmosphere after tabletting and forming;
and adding the tablets into a crusher for crushing, grinding and crushing the crushed tablets by a grinder, and sieving the crushed tablets by a sieve of 160-mesh and 200-mesh to obtain the powder coating.
The invention has the beneficial effects that: the powder coating can achieve the accumulated color difference of primary and secondary electroplating of not more than 1.0, and the adhesive force is kept at zero level. The neutral salt spray test may pass 1000 hours. In addition, the coating is powder, does not contain VOC, and meets the requirement of environmental protection.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
The invention provides an electroplating-resistant powder coating which comprises the following raw materials in parts by weight:
20-26 parts of polyethylene resin
30-57 parts of polyester resin
8-14 parts of curing agent
15-30 parts of titanium dioxide
12-16 parts of silicon powder.
Preferably, the curing agent is TGIC; the acid value of the polyester resin is in the range of 46-48MGKOH/G, the softening point is in the range of 120-125 ℃, and the glass transition temperature is more than 60 ℃.
The invention also provides a preparation method of the electroplating-resistant powder coating, which comprises the following steps:
uniformly mixing the raw materials, and crushing to 70-80 meshes;
adding the mixed material into a double-screw extruder, wherein the rotating speed of a screw is 150-;
adding the melt extrusion into a tablet press, and cooling in a nitrogen atmosphere after tabletting and forming;
and adding the tablets into a crusher for crushing, grinding and crushing the crushed tablets by a grinder, and sieving the crushed tablets by a sieve of 160-mesh and 200-mesh to obtain the powder coating.
Detailed description of the preferred embodiment 1
An electroplating-resistant powder coating comprises the following raw materials in parts by weight:
polyethylene resin 20 parts
57 parts of polyester resin
8 portions of curing agent
30 parts of titanium dioxide
And 12 parts of silicon powder.
The curing agent is TGIC; the acid value of the polyester resin is in the range of 46-48MGKOH/G, the softening point is in the range of 120-125 ℃, and the glass transition temperature is more than 60 ℃.
The invention also provides a preparation method of the electroplating-resistant powder coating, which comprises the following steps:
uniformly mixing the raw materials, and crushing to 70 meshes;
adding the mixed materials into a double-screw extruder, wherein the rotating speed of screws is 150r/min, the temperature of a machine cavity is 100 ℃, the temperature of a machine head is 120 ℃, and performing melt extrusion to obtain an extruded material;
adding the melt extrusion into a tablet press, and cooling in a nitrogen atmosphere after tabletting and forming;
and adding the pressed sheets into a crusher for crushing, grinding and crushing the crushed pressed sheets by a grinder, and sieving the crushed pressed sheets by a 160-mesh sieve to obtain the powder coating.
Specific example 2
An electroplating-resistant powder coating comprises the following raw materials in parts by weight:
polyethylene resin 22 parts
45 parts of polyester resin
Curing agent 10 parts
24 portions of titanium dioxide
And 14 parts of silicon powder.
The curing agent is TGIC; the acid value of the polyester resin is in the range of 46-48MGKOH/G, the softening point is in the range of 120-125 ℃, and the glass transition temperature is more than 60 ℃.
The invention also provides a preparation method of the electroplating-resistant powder coating, which comprises the following steps:
uniformly mixing the raw materials, and crushing to 75 meshes;
adding the mixed materials into a double-screw extruder, wherein the rotating speed of screws is 178r/min, the temperature of a machine cavity is 115 ℃, the temperature of a machine head is 140 ℃, and performing melt extrusion to obtain an extrudate;
adding the melt extrusion into a tablet press, and cooling in a nitrogen atmosphere after tabletting and forming;
and adding the pressed sheets into a crusher for crushing, grinding and crushing the crushed pressed sheets by a grinder, and sieving the crushed pressed sheets by a 180-mesh sieve to obtain the powder coating.
Specific example 3
An electroplating-resistant powder coating comprises the following raw materials in parts by weight:
26 parts of polyethylene resin
30 parts of polyester resin
14 parts of curing agent
15 parts of titanium dioxide
And 16 parts of silicon powder.
The curing agent is TGIC; the acid value of the polyester resin is in the range of 46-48MGKOH/G, the softening point is in the range of 120-125 ℃, and the glass transition temperature is more than 60 ℃.
The invention also provides a preparation method of the electroplating-resistant powder coating, which comprises the following steps:
uniformly mixing the raw materials, and crushing to 80 meshes;
adding the mixed materials into a double-screw extruder, wherein the rotating speed of screws is 200r/min, the temperature of a machine cavity is 120 ℃, the temperature of a machine head is 150 ℃, and performing melt extrusion to obtain an extrudate;
adding the melt extrusion into a tablet press, and cooling in a nitrogen atmosphere after tabletting and forming;
and adding the pressed sheets into a crusher for crushing, grinding and crushing the crushed pressed sheets by a grinder, and sieving the crushed pressed sheets by a 200-mesh sieve to obtain the powder coating.
The invention has the beneficial effects that: the powder coating can achieve the accumulated color difference of primary and secondary electroplating of not more than 1.0, and the adhesive force is kept at zero level. The neutral salt spray test may pass 1000 hours. In addition, the coating is powder, does not contain VOC, and meets the requirement of environmental protection.
The present invention has been described in detail, and the principle and embodiments of the present invention are explained by applying specific examples, which are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
Claims (4)
1. An electroplating-resistant powder coating is characterized by comprising the following raw materials in parts by weight:
20-26 parts of polyethylene resin
30-57 parts of polyester resin
8-14 parts of curing agent
15-30 parts of titanium dioxide
12-16 parts of silicon powder.
2. The plating resistant powder coating of claim 1, wherein the curing agent is TGIC.
3. The plating-resistant powder coating as claimed in claim 1, wherein the polyester resin has an acid value ranging from 46 to 48MGKOH/G, a softening point ranging from 120 degrees to 125 degrees, and a glass transition temperature greater than 60 degrees.
4. A method of preparing an electroplating-resistant powder coating according to claim 1, comprising the steps of:
uniformly mixing the raw materials, and crushing to 70-80 meshes;
adding the mixed material into a double-screw extruder, wherein the rotating speed of a screw is 150-;
adding the melt extrusion into a tablet press, and cooling in a nitrogen atmosphere after tabletting and forming;
and adding the tablets into a crusher for crushing, grinding and crushing the crushed tablets by a grinder, and sieving the crushed tablets by a sieve of 160-mesh and 200-mesh to obtain the powder coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011037904.3A CN112126323A (en) | 2020-09-28 | 2020-09-28 | Electroplating-resistant powder coating and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011037904.3A CN112126323A (en) | 2020-09-28 | 2020-09-28 | Electroplating-resistant powder coating and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
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| CN112126323A true CN112126323A (en) | 2020-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011037904.3A Withdrawn CN112126323A (en) | 2020-09-28 | 2020-09-28 | Electroplating-resistant powder coating and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130230696A1 (en) * | 2010-11-02 | 2013-09-05 | Akzo Nobel Coatings International B.V. | Matte textured powder monocoat coating compositions |
| CN105062311A (en) * | 2015-07-31 | 2015-11-18 | 安徽圣德建材科技有限公司 | Water-resistant epoxy polyester powdery paint |
| CN106928819A (en) * | 2017-03-03 | 2017-07-07 | 安徽桑瑞斯环保新材料有限公司 | Powdery paints of resistance to plating for wave filter and preparation method thereof |
| CN111393961A (en) * | 2020-06-05 | 2020-07-10 | 广东睿智环保科技有限责任公司 | Thermosetting thermoplastic amphoteric powder coating and preparation method thereof |
-
2020
- 2020-09-28 CN CN202011037904.3A patent/CN112126323A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130230696A1 (en) * | 2010-11-02 | 2013-09-05 | Akzo Nobel Coatings International B.V. | Matte textured powder monocoat coating compositions |
| CN105062311A (en) * | 2015-07-31 | 2015-11-18 | 安徽圣德建材科技有限公司 | Water-resistant epoxy polyester powdery paint |
| CN106928819A (en) * | 2017-03-03 | 2017-07-07 | 安徽桑瑞斯环保新材料有限公司 | Powdery paints of resistance to plating for wave filter and preparation method thereof |
| CN111393961A (en) * | 2020-06-05 | 2020-07-10 | 广东睿智环保科技有限责任公司 | Thermosetting thermoplastic amphoteric powder coating and preparation method thereof |
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Application publication date: 20201225 |