CN106675347B - Powder coating for roll-bond evaporator and preparation method thereof - Google Patents
Powder coating for roll-bond evaporator and preparation method thereof Download PDFInfo
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- CN106675347B CN106675347B CN201611253133.5A CN201611253133A CN106675347B CN 106675347 B CN106675347 B CN 106675347B CN 201611253133 A CN201611253133 A CN 201611253133A CN 106675347 B CN106675347 B CN 106675347B
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- powder coating
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- extruder
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- 239000000843 powder Substances 0.000 title claims abstract description 61
- 238000000576 coating method Methods 0.000 title claims abstract description 42
- 239000011248 coating agent Substances 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 239000004645 polyester resin Substances 0.000 claims abstract description 13
- 229920001225 polyester resin Polymers 0.000 claims abstract description 13
- 238000003801 milling Methods 0.000 claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 11
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 8
- ISAOCJYIOMOJEB-UHFFFAOYSA-N benzoin Chemical compound C=1C=CC=CC=1C(O)C(=O)C1=CC=CC=C1 ISAOCJYIOMOJEB-UHFFFAOYSA-N 0.000 claims abstract description 8
- 235000013312 flour Nutrition 0.000 claims abstract description 8
- 239000000945 filler Substances 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 7
- 244000028419 Styrax benzoin Species 0.000 claims abstract description 4
- 235000000126 Styrax benzoin Nutrition 0.000 claims abstract description 4
- 235000008411 Sumatra benzointree Nutrition 0.000 claims abstract description 4
- 229960002130 benzoin Drugs 0.000 claims abstract description 4
- 238000007590 electrostatic spraying Methods 0.000 claims abstract description 4
- 238000001125 extrusion Methods 0.000 claims abstract description 4
- 235000019382 gum benzoic Nutrition 0.000 claims abstract description 4
- 239000000049 pigment Substances 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims abstract description 4
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 4
- 238000005303 weighing Methods 0.000 claims abstract description 4
- 238000005507 spraying Methods 0.000 claims abstract description 3
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- OUPZKGBUJRBPGC-UHFFFAOYSA-N 1,3,5-tris(oxiran-2-ylmethyl)-1,3,5-triazinane-2,4,6-trione Chemical group O=C1N(CC2OC2)C(=O)N(CC2OC2)C(=O)N1CC1CO1 OUPZKGBUJRBPGC-UHFFFAOYSA-N 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 238000005452 bending Methods 0.000 abstract description 6
- 239000002994 raw material Substances 0.000 abstract 1
- 230000008014 freezing Effects 0.000 description 7
- 238000007710 freezing Methods 0.000 description 7
- 239000004594 Masterbatch (MB) Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Landscapes
- 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 a powder coating for an inflation type evaporator, which comprises polyester resin, a curing agent, a filler, titanium dioxide, a flatting agent, a brightener, benzoin, elastic powder, a curing accelerator and pigment. The preparation method of the powder coating comprises the following steps: s1, weighing the components in parts by weight, premixing for 6-9 min, and stirring by a high-speed mixer; s2, adding the uniformly mixed raw materials in the step S1 into an extruder for melt extrusion and tabletting, wherein the temperature of a zone I of the extruder is 90-100 ℃, and the temperature of a zone II of the extruder is 95-105 ℃; and S3, adding the sheet materials obtained in the step S2 into a flour mill for milling, wherein the main milling speed of the flour mill is 45-50 Hz, the auxiliary milling speed is 20-35 Hz, and the screen mesh is 180-200 meshes to obtain a powder finished product. And in addition, adding the powder finished product obtained in the step S3 into an electrostatic spraying gun, and spraying the powder finished product onto the base material of the roll-bond evaporator to obtain the powder coating. The powder coating of the invention still has good impact resistance and bending property after being frozen at low temperature.
Description
Technical Field
The invention belongs to the technical field of powder coatings, and particularly relates to a powder coating for a roll-bond evaporator and a preparation method thereof.
Background
The powder coating has the advantages of environmental friendliness, no pollution, simple process and the like, and is widely applied to the industry of household appliances, kitchens and bathrooms. The evaporator is an important part in four refrigeration parts, and low-temperature condensed liquid is subjected to heat exchange with external air through the evaporator, and is gasified to absorb heat, so that the refrigeration effect is achieved. The roll-bond evaporators require coatings of powder coatings which, after low-temperature freezing, still have good impact resistance and bending properties, which are not met by the powder coatings currently on the market.
Disclosure of Invention
In view of the above-described drawbacks of the prior art, the present invention provides a powder coating for an expansion evaporator excellent in impact resistance and bending property after freezing at a low temperature, and a method for preparing the same.
In order to realize one of the purposes, the invention provides a powder coating for a roll-bond evaporator, which adopts the following technical scheme:
the powder coating for the roll-bond evaporator comprises the following components in parts by mass:
50-70 parts of polyester resin;
3-7 parts of a curing agent;
10-20 parts of a filler;
10-25 parts of titanium dioxide;
0.5-1.5 parts of a leveling agent;
0.5 to 1.5 parts of a brightener;
0.1-1% of benzoin;
0.5-1.5 parts of elastic powder;
0.5-1.5% of a curing accelerator;
0-5% of pigment.
Preferably, the polyester resin is a carboxyl-terminated polyester resin.
Preferably, the curing agent is triglycidyl isocyanurate.
Preferably, the curing accelerator is polyester resin which contains 5% of catalytic master batch, has an acid value of 20-40 mgKOH/g, a viscosity of 2800-3800 mPa.s and is at 200 ℃.
Further, the curing accelerator is named ADDITOL P964 of cyanotex corporation.
Preferably, the elastic powder is polyurethane elastic powder 5070D with the relative density of 1.0-1.5, the volume weight of 0.5-0.9 g/mL and the average particle size of 15-40 mu m.
Preferably, the filler is precipitated barium sulfate.
The invention also aims to provide a preparation method of the powder coating for the roll-bond evaporator, which comprises the following steps:
s1, weighing the components in parts by weight, premixing for 6-9 min, and stirring in a high-speed mixer;
s2, adding the powder obtained in the step S1 into an extruder for melt extrusion and tabletting, wherein the temperature of a zone I of the extruder is 90-100 ℃, and the temperature of a zone II of the extruder is 95-105 ℃;
and S3, adding the sheet materials obtained in the step S2 into a flour mill for milling, wherein the main milling speed of the flour mill is 45-50 Hz, the auxiliary milling speed is 20-35 Hz, and the screen mesh is 180-200 meshes to obtain a powder finished product.
In addition, the powder finished product obtained in the step S3 is added to an electrostatic spray gun and sprayed on the roll-bond evaporator base material, so that the powder coating can be prepared.
The invention has the beneficial effects that:
according to the invention, on one hand, the elastic powder has better elasticity and low temperature resistance, the elasticity, toughness and low temperature resistance of the coating are increased, so that the coating has good bending property, on the other hand, the curing accelerator is used for accelerating the curing of the powder coating, the ADDITOL P964 of Cyanote company is adopted as the curing accelerator, the reaction with carboxyl and epoxy groups in polyester resin can be accelerated, the micromolecules of hydrophilic hydroxyl groups are consumed, and the crosslinking density of the powder coating is further increased, so that the combined use of the elastic powder and the curing accelerator makes up the defects of poor impact resistance and bending property of the powder coating after low-temperature freezing in the prior art, the coating is endowed with good impact resistance, the technical requirements of an inflation type evaporator on the powder coating are met, and the application of the powder coating in the freezing resistance field is widened.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Powder coating for roll-bond evaporator
The coating comprises the following components in parts by mass: 50-70 parts of polyester resin; 3-7 parts of a curing agent; 10-20 parts of a filler; 10-25 parts of titanium dioxide; 0.5-1.5 parts of a leveling agent; 0.5-1.5 parts of a brightener; 0.1-1 part of benzoin; 0.5-1.5 parts of elastic powder; 0.5-1.5 parts of a curing accelerator; 0-5 parts of pigment.
As shown in the following table, the components of the formulations of the preferred embodiments are in parts by mass.
Wherein the polyester resin is carboxyl-terminated polyester resin; the curing agent is triglycidyl isocyanurate; the filler is precipitated barium sulfate.
The curing accelerator is polyester resin which contains 5% of catalytic master batch, has an acid value of 20-40 mgKOH/g, a viscosity of 2800-3800 mPa.s and a temperature of 200 ℃. Specifically, the curing accelerator is ADDITOL P964 from cyanotex corporation.
The elastic powder is polyurethane elastic powder 5070D with the relative density of 1.0-1.5, the volume weight of 0.5-0.9 g/mL and the average particle size of 15-40 mu m.
Preparation method of powder coating for roll-bond evaporator
The manufacturing process comprises the following steps:
s1, weighing the components in the embodiment according to the formula, premixing for 6-9 min, and stirring by a high-speed mixer;
s2, adding the powder obtained in the step S1 into an extruder for melt extrusion and tabletting, wherein the temperature of a zone I of the extruder is 90-100 ℃, and the temperature of a zone II of the extruder is 95-105 ℃;
s3, adding the sheet materials obtained in the step S2 into a flour mill for milling, wherein the main milling speed of the flour mill is 45-50 Hz, the auxiliary milling speed is 20-35 Hz, and a screen is 180-200 meshes to obtain a powder finished product;
and S4, adding the powder finished product obtained in the step S3 into an electrostatic spraying gun, and spraying the powder finished product onto the roll-bond evaporator plate to form a powder coating.
The powder coatings obtained in the above examples were tested
The results of the freeze resistance test on the powder coatings are shown in the following table:
test results show that the effects of the embodiment 1 without adding the elastic powder and the curing accelerator and the embodiment 2 without adding the curing accelerator do not reach the use requirement of low-temperature freezing resistance; in each of examples 1 to 3, the excellent low-temperature freezing resistance was achieved. The invention makes up the defects of poor impact resistance and bending property of the powder coating after low-temperature freezing in the prior art by using the elastic powder and the curing accelerator together, endows the coating with good impact resistance, and can successfully meet the technical requirements of the roll-bond evaporator on the used powder coating.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (4)
1. The powder coating for the roll-bond evaporator is characterized by comprising the following components in parts by mass:
50-70 parts of polyester resin;
3-7 parts of a curing agent;
10-20 parts of a filler;
10-25 parts of titanium dioxide;
0.5-1.5 parts of a leveling agent;
0.5 to 1.5 parts of a brightener;
0.1-1% of benzoin;
0.5-1.5 parts of elastic powder;
0.5-1.5% of a curing accelerator;
0-5 parts of pigment;
wherein the polyester resin is carboxyl-terminated polyester resin; the curing agent is triglycidyl isocyanurate;
the curing accelerator is ADDITOL P964 from cyanotex corporation;
the elastic powder is polyurethane elastic powder 5070D with the relative density of 1.0-1.5, the volume weight of 0.5-0.9 g/mL and the average particle size of 5-15 mu m.
2. A powder coating for a roll-bond evaporator according to claim 1, characterized in that the filler is precipitated barium sulfate.
3. A method for preparing a powder coating for a roll-bond evaporator according to claim 1 or 2, comprising the steps of:
s1, weighing the components in parts by weight, premixing for 6-9 min, and stirring in a high-speed mixer;
s2, adding the powder obtained in the step S1 into an extruder for melt extrusion and tabletting, wherein the temperature of a zone I of the extruder is 90-100 ℃, and the temperature of a zone II of the extruder is 95-105 ℃;
and S3, adding the sheet materials obtained in the step S2 into a flour mill for milling, wherein the main milling speed of the flour mill is 45-50 Hz, the auxiliary milling speed is 20-35 Hz, and the screen mesh is 180-200 meshes, so that a finished product of the powder coating is obtained.
4. Use of the method according to claim 3 for the preparation of a powder coating for a roll-bond evaporator for the preparation of the powder coating obtained, characterized in that: and (5) adding the finished powder coating obtained in the step S3 into an electrostatic spraying gun, and spraying the electrostatic spraying gun onto the base material of the roll-bond evaporator to prepare the powder coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611253133.5A CN106675347B (en) | 2016-12-30 | 2016-12-30 | Powder coating for roll-bond evaporator and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611253133.5A CN106675347B (en) | 2016-12-30 | 2016-12-30 | Powder coating for roll-bond evaporator and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106675347A CN106675347A (en) | 2017-05-17 |
| CN106675347B true CN106675347B (en) | 2020-06-05 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107022285A (en) * | 2017-04-26 | 2017-08-08 | 安徽联硕实业有限公司 | It is a kind of for polyester powder coating of electromagnetic wire and preparation method thereof |
| CN110183945A (en) * | 2019-05-30 | 2019-08-30 | 上海纳旭实业有限公司 | Low temperature impact heat insulating coat and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20080233300A1 (en) * | 2007-03-19 | 2008-09-25 | Cinoman Douglas S | Thermosetting powders comprising curing agent adducts of polyesters and strong, flexible powder coatings made therefrom |
| CN101805556A (en) * | 2010-04-12 | 2010-08-18 | 安徽华辉塑业科技有限公司 | Thermosetting powder coating with high tenacity |
| CN102002309A (en) * | 2010-12-24 | 2011-04-06 | 江苏华光粉末有限公司 | Epoxy polyester type powder coating for evaporator and preparation method thereof |
| CN103571321B (en) * | 2012-08-01 | 2016-01-27 | 展辰新材料集团股份有限公司 | A kind of Anti-scratch paint composition and preparation method thereof |
| CN103265878B (en) * | 2013-05-23 | 2015-09-16 | 天津翔盛粉末涂料有限公司 | A kind of metal substrate vacuum plating bottom powder coating and preparation method thereof |
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| CN106675347A (en) | 2017-05-17 |
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