CN112831258A - Environment-friendly hot-press-resistant transparent finishing powder and preparation method thereof - Google Patents
Environment-friendly hot-press-resistant transparent finishing powder and preparation method thereof Download PDFInfo
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- CN112831258A CN112831258A CN202110241127.2A CN202110241127A CN112831258A CN 112831258 A CN112831258 A CN 112831258A CN 202110241127 A CN202110241127 A CN 202110241127A CN 112831258 A CN112831258 A CN 112831258A
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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 environment-friendly hot-press-resistant transparent finishing powder, which belongs to the field of powder coating and comprises the following components in percentage by mass: 80-85% of polyester resin, 6-9% of triglycidyl isocyanurate, 0.7-1% of acrylic copolymer flatting agent, 0.5-1% of wetting agent, 0.2-0.3% of benzine degasifier, 0.3-0.5% of thermoplastic resin, 0.2-0.4% of organic tin catalyst, 0.3-0.5% of adhesion promoter and 5-10% of precipitated barium sulfate. The environment-friendly hot-press-resistant transparent finishing powder disclosed by the invention is good in transparency, free of indentation after hot pressing, free of coating falling off, good in storage stability, and more durable in color retention time, and the surface experience and satisfaction of customers on door products are improved.
Description
Technical Field
The invention belongs to the field of powder coating, and particularly relates to environment-friendly hot-press-resistant transparent finishing powder and a preparation method thereof.
Background
After the transfer printing of the transfer printing door, a layer of oily gloss oil needs to be sprayed to improve the surface decoration effect and the anticorrosion function of the product, but after the oily gloss oil is glued and hot-pressed, the surface has indentations, the coating is easy to fall off, the surface effect is greatly reduced, the quality risk is high, and the environment pollution can be caused by the subsequent treatment of residues.
Disclosure of Invention
The invention aims to provide environment-friendly hot-press-resistant transparent finishing powder and a preparation method thereof, which can solve the problems of indentation and coating falling and can reduce the environment-friendly pressure.
The more specific technical scheme of the invention is as follows:
the environment-friendly hot-press-resistant transparent finishing powder comprises the following components in percentage by mass: 80-85% of polyester resin, 6-9% of triglycidyl isocyanurate, 0.7-1% of acrylic copolymer, 0.5-1% of wetting agent, 0.2-0.3% of benzidine degasifier, 0.3-0.5% of thermoplastic resin, 0.2-0.4% of organic tin catalyst, 0.3-0.5% of adhesion promoter and 5-10% of precipitated barium sulfate.
Further, the resin acid value of the polyester resin is 33-45AV, and the epoxy value of triglycidyl isocyanurate is 0.12.
Further, the weight ratio of the polyester resin to triglycidyl isocyanurate is 93: 7-90: 10.
the invention also provides a preparation method of the environment-friendly hot-press-resistant transparent finishing powder, which comprises the following steps:
step 1: sequentially weighing polyester resin, triglycidyl isocyanurate, acrylic copolymer, a flatting agent, a benzine degasifier, a wetting agent, thermoplastic resin, an organic tin catalyst, an adhesion promoter and precipitated barium sulfate according to the proportion of the dosage, adding into a high-speed stirring cylinder, and uniformly mixing;
step 2: putting the uniformly mixed materials into a reciprocating extruder for melt mixing, pressing the materials to be 0.5-1.5mm in thickness by a steel strip tabletting machine, and crushing the materials into 2-3mm thin flaky sheets;
and step 3: and (3) putting the crushed sheet materials into a cyclone separation mill, and grinding the sheet materials into powder with the average grain diameter of 32-35 microns. The particle size is in a state of 32-35 microns, which is beneficial to improving the surface effect in an excellent state after film formation.
In step 1, the rotating speed of the high-speed mixer is 2000-2500 rpm, and the dispersion time is 5-7 minutes.
In step 2, the temperature of the melt mixing of the reciprocating extruder is constant 105-110 ℃. The set temperature can fully melt all solid materials into liquid and can completely coat the solid materials; the subsequent grinding is facilitated by the 2-3mm flake breaking.
Compared with the prior art, the invention has the beneficial effects that:
1. the transparent hot-pressing resistant powder has good transparency, no indentation after hot pressing, no falling off of a coating and good storage stability.
2. The use is simple, and the oily gloss oil can be replaced by 100 percent;
3. the environment is not polluted, and the recovery utilization rate reaches 99.9 percent;
4. the production is simple, and no additional equipment or labor is added;
5. the coating has wide applicability and is suitable for surface coating of any hardware.
Detailed Description
The present invention will be further described with reference to the following examples, which are intended to illustrate only some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, other embodiments used by those skilled in the art without any creative effort belong to the protection scope of the present invention.
Example 1:
an environment-friendly hot-pressing-resistant transparent powder coating comprises the following components in percentage by mass: 80% of polyester resin, 7% of triglycidyl isocyanurate, 1% of acrylic copolymer flatting agent, 0.5% of wetting agent, 0.3% of benzine degasifier, 0.5% of thermoplastic resin, 0.4% of organic tin catalyst, 0.3% of adhesion promoter and 10% of precipitated barium sulfate.
The embodiment also provides a preparation method of the environment-friendly hot-pressing-resistant transparent powder coating, which comprises the following steps:
step 1: sequentially weighing polyester resin, triglycidyl isocyanurate, acrylic copolymer, a flatting agent, a benzine degasifier, a wetting agent, thermoplastic resin, an organic tin catalyst, an adhesion promoter and precipitated barium sulfate according to the proportion of the dosage, adding into a high-speed stirring cylinder, and uniformly mixing; the speed of the high-speed mixer was 2000 rpm and the dispersion time was 7 minutes.
Step 2: putting the uniformly mixed materials into a reciprocating extruder, carrying out melt mixing at a constant temperature of 105 ℃, and pressing the materials into thin flaky sheets with the thickness of 1mm and the thickness of 3mm by a steel strip tabletting machine;
and step 3: and (3) putting the crushed sheet materials into a cyclone separation mill, and grinding the sheet materials into powder with the average particle size of 32 microns. The particle size is in a 32 micron state, which is beneficial to improving the surface effect in an excellent state after film forming.
Example 2:
an environment-friendly hot-pressing-resistant transparent powder coating comprises the following components in percentage by mass: 83% of polyester resin, 8% of triglycidyl isocyanurate, 0.8% of acrylic copolymer flatting agent, 0.8% of wetting agent, 0.3% of benzine degasifier, 0.5% of thermoplastic resin, 0.4% of organic tin catalyst, 0.4% of adhesion promoter and 5.8% of precipitated barium sulfate.
The embodiment also provides a preparation method of the environment-friendly hot-pressing-resistant transparent powder coating, which comprises the following steps:
step 1: sequentially weighing polyester resin, triglycidyl isocyanurate, acrylic copolymer, a flatting agent, a benzine degasifier, a wetting agent, thermoplastic resin, an organic tin catalyst, an adhesion promoter and precipitated barium sulfate according to the proportion of the dosage, adding into a high-speed stirring cylinder, and uniformly mixing; the speed of the high speed mixer was 2500 rpm, and the dispersion time was 5 minutes.
Step 2: putting the uniformly mixed materials into a reciprocating extruder, carrying out melt mixing at the constant temperature of 110 ℃, and pressing the materials to be 1.2mm in thickness by a steel belt tabletting machine and crushing the materials into 2mm thin flaky sheets;
and step 3: and (3) putting the crushed sheet materials into a cyclone separation grinding mill, and grinding the sheet materials into powder with the average particle size of 35 microns. The particle size is in a 32 micron state, which is beneficial to improving the surface effect in an excellent state after film forming.
Example 3:
an environment-friendly hot-pressing-resistant transparent powder coating comprises the following components in percentage by mass: 85% of polyester resin, 6% of triglycidyl isocyanurate, 0.8% of acrylic copolymer flatting agent, 0.7% of wetting agent, 0.5% of benzine degasifier, 0.5% of thermoplastic resin, 0.2% of organic tin catalyst, 0.3% of adhesion promoter and 6% of precipitated barium sulfate.
The embodiment also provides a preparation method of the environment-friendly hot-pressing-resistant transparent powder coating, which comprises the following steps:
step 1: sequentially weighing polyester resin, triglycidyl isocyanurate, acrylic copolymer, a flatting agent, a benzine degasifier, a wetting agent, thermoplastic resin, an organic tin catalyst, an adhesion promoter and precipitated barium sulfate according to the proportion of the dosage, adding into a high-speed stirring cylinder, and uniformly mixing; the high-speed mixer was operated at 2300 rpm for 6 minutes.
Step 2: putting the uniformly mixed materials into a reciprocating extruder, carrying out melt mixing at the constant temperature of 108 ℃, and pressing the materials into thin flaky sheets with the thickness of 0.8mm and the thickness of 3mm by a steel strip tabletting machine;
and step 3: and (3) putting the crushed sheet materials into a cyclone separation grinding mill, and grinding the sheet materials into powder with the average particle size of 35 microns. The particle size is in a 32 micron state, which is beneficial to improving the surface effect in an excellent state after film forming.
The product detection method and standard are as follows:
paint film thickness test:
according to a GB/T13452.2-92 thickness test method, an electromagnetic film tester is adopted for testing, and the film is qualified when the film reaches 40-50 um.
And (3) testing the hardness of the paint film:
according to the GB/T1730-93 scratch hardness method, the product reaches 1H-2H as qualified.
And (3) testing the adhesive force of the paint film:
and according to a GB/T1720-89 hundred-grid plate partition test method, the product which reaches the 0 grade is qualified.
And (3) testing the flexibility of the paint film:
the cylinder bending is qualified by using a flexibility tester according to the GB/T1731-93 specification and reaching the diameter of 10mm or less.
And (3) testing the impact resistance of the paint film:
according to the GB/T1732-93 weight hammer impact method, the front impact and the back impact both reach 40 N.CM, and the front impact and the back impact do not break or fall off, so the product is qualified.
Paint film gloss test:
according to GB/T1743-1979(1989) glossiness measuring method, a 60-degree angle gloss meter is adopted to test, and 35 +/-5 degrees is qualified.
The paint film properties of the products of the examples were tested as follows:
| numbering | Thickness of | Hardness of | Adhesion force | Flexibility | Impact force | Degree of gloss |
| Example 1 | 42um | 1H | Level 0 | 5mm | 58N·cm | 32 degree |
| Example 2 | 48um | 1.5H | Level 0 | 8mm | 62N·cm | 28 degree |
| Example 3 | 45um | 1.2H | Level 0 | 6mm | 65N·cm | 35 degree |
The proportion of the polyester resin used in the formula and triglycidyl isocyanurate is very important, and the following results are obtained through verification for a plurality of times: the ratio of polyester resin to triglycidyl isocyanurate must be maintained at "93: within the range of 7', the prepared product can be ensured to have compact cross-linking of paint film molecules, moderate hardness, and excellent flexibility and impact resistance.
The organic tin catalyst and the thermoplastic resin are very critical, the usage amount of the organic tin catalyst and the thermoplastic resin respectively accounts for 0.2-0.4 percent of the total content of all the resins in the formula, and if the usage amount is too large or too small, the organic tin catalyst and the thermoplastic resin can cause great influence on the appearance of a coating film, and further influence each performance index of the coating film.
Although the present invention has been described herein with reference to the illustrated embodiments thereof, which are intended to be preferred embodiments of the present invention, it is to be understood that the invention is not limited thereto, and that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure.
Claims (6)
1. The environment-friendly hot-press-resistant transparent finishing powder is characterized by comprising the following components in percentage by mass: 80-85% of polyester resin, 6-9% of triglycidyl isocyanurate, 0.7-1% of acrylic copolymer flatting agent, 0.5-1% of wetting agent, 0.2-0.3% of benzine degasifier, 0.3-0.5% of thermoplastic resin, 0.2-0.4% of organic tin catalyst, 0.3-0.5% of adhesion promoter and 5-10% of precipitated barium sulfate.
2. The environment-friendly hot press resistant translucent overprint varnish powder of claim 1, wherein the polyester resin has a resin acid value of 33 to 45AV and the epoxy value of triglycidyl isocyanurate is 0.12.
3. The environment-friendly hot-press-resistant translucent overprint varnish powder of claim 1, wherein the weight ratio of the polyester resin to triglycidyl isocyanurate is 93: 7-90: 10.
4. a method for preparing an environment-friendly heat-press-resistant transparent finishing powder, which comprises the steps of any one of claims 1 to 3, and comprises the following steps:
step 1: sequentially weighing polyester resin, triglycidyl isocyanurate, an acrylic copolymer flatting agent, a benzine degasifier, a wetting agent, thermoplastic resin, an organic tin catalyst, an adhesion promoter and precipitated barium sulfate according to the proportion of the dosage, adding into a high-speed stirring cylinder, and uniformly mixing;
step 2: putting the uniformly mixed materials into a reciprocating extruder for melt mixing, pressing the materials to be 0.5-1.5mm in thickness by a steel strip tabletting machine, and crushing the materials into 2-3mm thin flaky sheets;
and step 3: and (3) putting the crushed sheet materials into a cyclone separation mill, and grinding the sheet materials into powder with the average grain diameter of 32-35 microns.
5. The method for preparing the environment-friendly hot-press-resistant translucent overprint varnish powder of claim 4, wherein in the step 1, the rotation speed of the high-speed mixer is 2000-2500 rpm, and the dispersion time is 5-7 minutes.
6. The method for preparing the environment-friendly hot-press-resistant translucent overprint varnish powder of claim 4, wherein in the step 2, the temperature of the reciprocating extruder for melt mixing is constant 105-110 ℃.
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| CN202110241127.2A CN112831258A (en) | 2021-03-04 | 2021-03-04 | Environment-friendly hot-press-resistant transparent finishing powder and preparation method thereof |
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Citations (5)
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|---|---|---|---|---|
| CN103265874A (en) * | 2013-05-23 | 2013-08-28 | 浙江超浪新材料有限公司 | High-toughness powder coating specially used for security door |
| CN104356916A (en) * | 2014-11-21 | 2015-02-18 | 广东华江粉末科技有限公司 | High-gloss polyurethane heat transfer printing powder paint for aluminium profile and preparation method thereof |
| CN104559691A (en) * | 2014-12-25 | 2015-04-29 | 江苏兰陵高分子材料有限公司 | Polymer composite for heat transfer printing low-temperature crosslinking and preparation method thereof |
| CN104877497A (en) * | 2015-05-15 | 2015-09-02 | 山东朗法博粉末涂装科技有限公司 | Low-optical-transparency powder paint and preparation method thereof |
| WO2021016731A1 (en) * | 2019-07-26 | 2021-02-04 | 擎天材料科技有限公司 | Polyester resin and preparation method therefor, coating, and workpiece |
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2021
- 2021-03-04 CN CN202110241127.2A patent/CN112831258A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103265874A (en) * | 2013-05-23 | 2013-08-28 | 浙江超浪新材料有限公司 | High-toughness powder coating specially used for security door |
| CN104356916A (en) * | 2014-11-21 | 2015-02-18 | 广东华江粉末科技有限公司 | High-gloss polyurethane heat transfer printing powder paint for aluminium profile and preparation method thereof |
| CN104559691A (en) * | 2014-12-25 | 2015-04-29 | 江苏兰陵高分子材料有限公司 | Polymer composite for heat transfer printing low-temperature crosslinking and preparation method thereof |
| CN104877497A (en) * | 2015-05-15 | 2015-09-02 | 山东朗法博粉末涂装科技有限公司 | Low-optical-transparency powder paint and preparation method thereof |
| WO2021016731A1 (en) * | 2019-07-26 | 2021-02-04 | 擎天材料科技有限公司 | Polyester resin and preparation method therefor, coating, and workpiece |
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