CN108610870B - Environment-friendly hot-melt pencil paint and preparation method and application method thereof - Google Patents
Environment-friendly hot-melt pencil paint and preparation method and application method thereof Download PDFInfo
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- CN108610870B CN108610870B CN201810410623.4A CN201810410623A CN108610870B CN 108610870 B CN108610870 B CN 108610870B CN 201810410623 A CN201810410623 A CN 201810410623A CN 108610870 B CN108610870 B CN 108610870B
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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
- C09D157/00—Coating compositions based on unspecified polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C09D157/02—Copolymers of mineral oil hydrocarbons
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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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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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
- C09D5/002—Priming paints
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- 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
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- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paints Or Removers (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
An environment-friendly hot-melt pencil paint and a preparation method and an application method thereof are disclosed, wherein in parts by mass, 25-30 parts of primer resin, 40-60 parts of filler and 5-10 parts of epoxidized soybean oil are uniformly mixed to obtain a primer; uniformly mixing 40-50 parts of finish paint resin, 30-40 parts of pigment and 5-10 parts of epoxidized soybean oil to obtain finish paint; and uniformly mixing 80-90 parts of finish paint resin and 5-10 parts of epoxidized soybean oil to obtain the varnish. And (3) adopting a rubber ring extrusion and drawing coating method, sequentially passing the pencil rod through a hopper containing primer, finish paint and varnish, and cooling to finish the pencil painting. The raw materials adopted by the invention are environment-friendly, the production process is clean and environment-friendly, no pollution is caused, the curing time of the coating is less than 5min, the heat-resisting temperature is more than 100 ℃, and the requirements of European Union toy safety standard EN71 are met.
Description
Technical Field
The invention relates to the technical field of pencil manufacturing, in particular to environment-friendly hot-melt pencil paint and a preparation method and an application method thereof.
Background
The pencil paint is mainly used for coating wood-holder pencils so as to achieve the effects of attractive appearance and pencil protection. At present, the preparation of the pencil paint mainly comprises the preparation of nitrolacquer, wherein a nitrocellulose mixed solvent is mixed during the preparation, the nitrocellulose is dissolved in the solvent to obtain a base material, and different pigments and auxiliary agents are added to prepare different types of pencil paints. The mixed solvent used for preparing the pencil paint mainly comprises ester, ketone and alcohol solvents, and when the pencil paint is used, the environment is polluted, and some of the mixed solvents also contain harmful substances, so that the health of pupils is harmed.
The lead core is considered to be the most harmful to children in the conventional concept, but actually the most dangerous is paint, wood and adhesive on the surface of the pencil, and the paint on the surface of the pencil instead contains metal lead, preservative and metal toxins such as mercury, arsenic and the like, so that the health of children biting the pencil is damaged. Pencils are the most commonly used by students, especially for writing and learning at present, and the safety and quality are more important for the students of lower grade and even preschool children. The quality of domestic stationery products is uneven, and the stationery products are relatively lagged behind in the establishment of stationery standards in China to a great extent, and lack a sound standard system. In addition, domestic consumers usually pay more attention to appearance and smell when purchasing stationery, neglecting the key problem of quality safety.
Then, how are safe stationery items chosen? Experts suggest that whistles and scented stationery should be avoided as much as possible, and that stationery with a bright and fresh appearance may contain an excessive amount of plasticizer. In addition, industry standards need to be identified. At present, domestic stationery generally takes 'general safety requirements of student articles' as reference, but manufacturers adopt European Union or American standards, which gives the opportunity of drilling blanks for some manufacturers. Taking CE standard of European Union as an example, the detection of the CE on stationery is divided into a plurality of levels from the most basic physical mechanical property test to the index test of various additives at the highest level. Some vendors may mislead consumers by generally identifying their products as meeting the european union standards after passing only a minimum level of authentication.
According to the knowledge, the requirement on the plasticizer content standard in stationery is not mentioned in the current national mandatory standard, but the national environmental protection standard refers to the international requirement, and the harmful substances in the student supplies are regulated. Such tests represent a high cost for the enterprise, so that only regular enterprises of considerable size will be actively checked. Taking the domestic wooden pencil brand Makepencils as an example, as the products are sold to 80 countries and regions all over the world, the annual cost for professional detection exceeds 500 ten thousand yuan, so as to ensure that the products reach all standards.
In addition to strict control of lead, which is a heavy metal in children products, in the recent american Consumer Product Safety Committee (CPSC), strict regulatory measures are also strengthened for other heavy metals such as cadmium and chromium. According to the CPSIA act (the American Consumer product safety improvement act), children's products include not only toys, but also products whose appearance or function indicates that the product is intended for children, such as various products printed with animal cartoon graphics. It is understood that many non-toy commodity production export enterprises do not have much knowledge about CPSIA and other regulations, for example, the pencil manufacturing industry considers that the pencil does not belong to a toy, and the quality requirement is not strict than that of the toy, so that the quality control according to the requirements of related children products is not realized in the purchasing of paint ink. However, most of the appearance of the pencils is coated with paint ink or film in the actual production process, and the pencils are easy to contact when being used by children, which brings great risk to the normal export and sale of products.
Disclosure of Invention
Based on the problems, the invention aims to provide environment-friendly hot-melt pencil paint and a preparation method and an application method thereof.
In order to achieve the purpose, the invention adopts the technical scheme that:
the environment-friendly hot-melt pencil paint comprises a primer and a finish, wherein the primer comprises, by mass, 25-30 parts of primer resin, 40-60 parts of filler and 5-10 parts of epoxidized soybean oil; the finishing paint comprises, by mass, 40-50 parts of finishing paint resin, 30-40 parts of pigment and 5-10 parts of epoxidized soybean oil.
The invention further improves that the primer resin is one of C5 petroleum resin and C9 petroleum resin or a mixture of the two in any proportion.
In a further improvement of the invention, the top coat resin is a thermoplastic polyurethane.
A further improvement of the invention is that the thermoplastic polyurethane is
WHT-1164、
WHT-1172、
WHT-1264 or
WHT-1129。
The invention is further improved in that the pigment is an inorganic pigment or an organic pigment with a fineness of more than 2000 mesh.
The invention further improves the epoxy resin varnish and the preparation method thereof, and the epoxy resin varnish further comprises varnish, wherein the varnish comprises 80-90 parts by mass of finish paint resin and 5-10 parts by mass of epoxidized soybean oil.
A preparation method of environment-friendly hot-melt pencil paint comprises the following steps:
(1) the preparation method of the primer comprises the following steps: uniformly mixing 25-30 parts by mass of primer resin, 40-60 parts by mass of filler and 5-10 parts by mass of epoxidized soybean oil to obtain a primer;
(2) the preparation method of the finish paint comprises the following steps: uniformly mixing 40-50 parts of finish paint resin, 30-40 parts of pigment and 5-10 parts of epoxidized soybean oil in parts by mass to obtain finish paint;
(3) the preparation method of the varnish comprises the following steps: and uniformly mixing 80-90 parts of finish paint resin and 5-10 parts of epoxidized soybean oil in parts by mass to obtain the varnish.
The invention further improves that the primer resin is one or a mixture of C5 petroleum resin and C9 petroleum resin in any proportion; the finishing resin is thermoplastic polyurethane; the pigment is an environment-friendly inorganic pigment or organic pigment with the fineness of more than 2000 meshes.
An application method of environment-friendly hot-melt pencil paint comprises the steps of adopting a rubber ring extrusion coating method, enabling a pencil rod to sequentially pass through a primer hopper, a finish paint hopper and a varnish hopper, and cooling to finish pencil painting, wherein the temperature of the primer in the primer hopper is kept between 180 ℃ and 220 ℃, and the temperature of the finish paint in the finish paint hopper and the temperature of the varnish in the varnish hopper are kept between 150 ℃ and 190 ℃.
The invention has the further improvement that the painting times of the primer is 1 to 3, the painting times of the finish paint is 1 to 3, and the painting times of the varnish is 0 to 2.
Compared with the prior art, the invention has the following beneficial effects: the primer and the finish coat form the pencil paint, wherein the primer comprises primer resin, a filler and epoxidized soybean oil; the finish paint comprises finish paint resin, pigment and epoxidized soybean oil. The adopted raw materials are environment-friendly, the preparation process is also environment-friendly, the environmental pollution is avoided, and the preparation method is simple and convenient and is easy to realize. When in application, the rubber ring extrusion drawing coating method is adopted for coating, the pencil is easy to prepare, the application process is clean and environment-friendly, no pollution is caused, and the requirements of European Union toy safety standard EN71 are met. The invention modifies the original equipment, can paint the pencil, has low cost, high painting efficiency and excellent coating performance, the curing time of the coating is less than 5min, and the heat-resisting temperature is more than 100 ℃.
Further, the primer resin is one of C5 petroleum resin and C9 petroleum resin or a mixture of the two in any proportion. The C5 petroleum resin and the C9 petroleum resin are respectively a thermoplastic resin produced by the processes of pretreatment, polymerization, distillation and the like of C5 fractions and C9 fractions which are byproducts of petroleum cracking; the finish resin is thermoplastic polyurethane, and the thermoplastic resin is used as a film forming material, so that the pencil is easily painted.
Further, during the application, to current varnishing machine reequip can, install heating heat preservation device additional on the hopper of varnishing machine, guarantee that hot melt type pencil lacquer is in the hot melt state can realize the japanning to the pencil, with low costs.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments, but the present invention is not limited to these examples.
The environment-friendly hot-melt pencil paint comprises a primer and a finish, wherein the primer comprises, by mass, 25-30 parts of primer resin, 40-60 parts of filler and 5-10 parts of epoxidized soybean oil; the finishing paint comprises, by mass, 40-50 parts of finishing paint resin, 30-40 parts of pigment and 5-10 parts of epoxidized soybean oil. The varnish comprises 80-90 parts of finish paint resin and 5-10 parts of epoxidized soybean oil in parts by mass.
The primer resin is one or a mixture of C5 petroleum resin and C9 petroleum resin in any proportion. The C5 petroleum resin and C9 petroleum resin are respectively a C5 fraction and a C9 fraction which are byproducts of petroleum cracking, and are produced into thermoplastic resin by processes of pretreatment, polymerization, distillation and the like.
The finishing resin is thermoplastic polyurethane. Such as Vanhua chemical group, Inc
WHT-1164、
WHT-1172、
WHT-1264、
WHT-1129, and the like.
The pigment is an environment-friendly inorganic pigment or organic pigment with the fineness of more than 2000 meshes.
A preparation method of environment-friendly hot-melt pencil paint comprises the following steps:
(1) the preparation method of the primer comprises the following steps: uniformly mixing 25-30 parts by mass of primer resin, 40-60 parts by mass of filler and 5-10 parts by mass of epoxidized soybean oil to obtain a primer;
(2) the preparation method of the finish paint comprises the following steps: uniformly mixing 40-50 parts of finish paint resin, 30-40 parts of pigment and 5-10 parts of epoxidized soybean oil in parts by mass to obtain finish paint;
(3) the preparation method of the varnish comprises the following steps: and uniformly mixing 80-90 parts of finish paint resin and 5-10 parts of epoxidized soybean oil in parts by mass to obtain the varnish.
The application method of the environment-friendly hot-melt pencil paint is characterized in that the painting machine is modified into a rubber ring extrusion drawing painting machine, and the modification part is mainly characterized in that a heating and heat-insulating device is additionally arranged on a hopper to ensure that the hot-melt pencil paint is in a hot-melt state, wherein the temperature of a primer hopper is kept between 180-fold and 220 ℃, and the temperature of a finish paint hopper and a varnish hopper is kept between 150-fold and 190 ℃.
And (3) adopting a rubber ring extrusion and drawing coating method, enabling the pencil rod to sequentially pass through a primer, a finish paint and a varnish hopper, and cooling to finish the pencil painting, wherein the temperature of the primer in the primer hopper is kept between 180 ℃ and 220 ℃, and the temperature of the finish paint in the finish paint hopper and the temperature of the varnish in the varnish hopper are kept between 150 ℃ and 190 ℃.
According to the painting requirements of different pencils, the painting times of the primer are 1-3 times, the painting times of the finish paint are 1-3 times, and the painting times of the varnish are 0-2 times.
Example 1
A preparation method of environment-friendly hot-melt pencil paint comprises the following steps:
(1) the preparation method of the primer comprises the following steps: uniformly mixing 25 parts of primer resin, 60 parts of filler and 5 parts of epoxidized soybean oil in parts by mass to obtain a primer;
(2) the preparation method of the finish paint comprises the following steps: uniformly mixing 50 parts of finish paint resin, 32 parts of pigment and 10 parts of epoxidized soybean oil in parts by mass to obtain finish paint;
(3) the preparation method of the varnish comprises the following steps: and uniformly mixing 80 parts of finish paint resin and 5 parts of epoxidized soybean oil in parts by mass to obtain the varnish.
Wherein the primer resin is C5 petroleum resin.
The finishing resin is thermoplastic polyurethane, in particular to the finishing resin of Wanhua chemical group company Limited
WHT-1164。
The pigment is an environment-friendly inorganic pigment with the fineness of more than 2000 meshes.
The application method of the environment-friendly hot-melt pencil paint adopts a rubber ring extrusion and suction coating method, and the pencil rod sequentially passes through a primer hopper, a finish paint hopper and a varnish hopper, and is cooled to finish pencil painting, wherein the temperature of the primer in the primer hopper is 180 ℃, the temperature of the finish paint in the finish paint hopper is 150 ℃, and the temperature of the varnish in the varnish hopper is 160 ℃.
According to the painting requirements of different pencils, the painting times of the primer is 1 time, the painting times of the finish paint is 3 times, and the painting times of the varnish is 1 time.
Example 2
A preparation method of environment-friendly hot-melt pencil paint comprises the following steps:
(1) the preparation method of the primer comprises the following steps: uniformly mixing 27 parts of primer resin, 50 parts of filler and 6 parts of epoxidized soybean oil in parts by mass to obtain a primer;
(2) the preparation method of the finish paint comprises the following steps: uniformly mixing 45 parts of finish paint resin, 35 parts of pigment and 9 parts of epoxidized soybean oil in parts by mass to obtain finish paint;
(3) the preparation method of the varnish comprises the following steps: and uniformly mixing 85 parts of finish paint resin and 7 parts of epoxidized soybean oil in parts by mass to obtain the varnish.
Wherein the primer resin is C9 petroleum resin.
The finishing resin is thermoplastic polyurethane, in particular to the finishing resin of Wanhua chemical group company Limited
WHT-1172。
The pigment is an environment-friendly organic pigment with the fineness of more than 2000 meshes.
The application method of the environment-friendly hot-melt pencil paint adopts a rubber ring extrusion and suction coating method, and the pencil rod sequentially passes through a primer hopper, a finish paint hopper and a varnish hopper, and is cooled to finish pencil painting, wherein the temperature of the primer in the primer hopper is 220 ℃, the temperature of the finish paint in the finish paint hopper is 170 ℃, and the temperature of the varnish in the varnish hopper is 150 ℃.
According to the painting requirements of different pencils, the painting times of the primer are 2 times, the painting times of the finish paint are 2 times, and the painting times of the varnish are 2 times.
Example 3
A preparation method of environment-friendly hot-melt pencil paint comprises the following steps:
(1) the preparation method of the primer comprises the following steps: uniformly mixing 28 parts of primer resin, 40 parts of filler and 7 parts of epoxidized soybean oil in parts by mass to obtain a primer;
(2) the preparation method of the finish paint comprises the following steps: uniformly mixing 42 parts of finish paint resin, 30 parts of pigment and 7 parts of epoxidized soybean oil in parts by mass to obtain finish paint;
(3) the preparation method of the varnish comprises the following steps: and uniformly mixing 87 parts of finishing resin and 9 parts of epoxidized soybean oil in parts by mass to obtain the varnish.
Wherein the primer resin is a mixture of C5 petroleum resin and C9 petroleum resin in any proportion.
The finishing resin is thermoplastic polyurethane, in particular to the finishing resin of Wanhua chemical group company Limited
WHT-1264。
The pigment is an environment-friendly organic pigment with the fineness of more than 2000 meshes.
The application method of the environment-friendly hot-melt pencil paint adopts a rubber ring extrusion and suction coating method, and the pencil rod sequentially passes through a priming paint hopper, a finishing paint hopper and a varnish hopper, and is cooled to finish pencil painting, wherein the temperature of the priming paint in the priming paint hopper is 190 ℃, the temperature of the finishing paint in the finishing paint hopper is 180 ℃, and the temperature of the varnish in the varnish hopper is 170 ℃.
According to the painting requirements of different pencils, the painting times of the primer is 3 times, the painting times of the finish paint is 1 time, and the painting times of the varnish is 1 time.
Example 4
A preparation method of environment-friendly hot-melt pencil paint comprises the following steps:
(1) the preparation method of the primer comprises the following steps: uniformly mixing 30 parts of primer resin, 55 parts of filler and 90 parts of epoxidized soybean oil in parts by mass to obtain a primer;
(2) the preparation method of the finish paint comprises the following steps: uniformly mixing 40 parts of finish paint resin, 40 parts of pigment and 5 parts of epoxidized soybean oil in parts by mass to obtain finish paint;
(3) the preparation method of the varnish comprises the following steps: and uniformly mixing 90 parts of finishing resin and 10 parts of epoxidized soybean oil in parts by mass to obtain the varnish.
Wherein the primer resin is C5 petroleum resin.
The finishing resin is thermoplastic polyurethane, in particular to the finishing resin of Wanhua chemical group company Limited
WHT-1129。
The pigment is an environment-friendly inorganic pigment with the fineness of more than 2000 meshes.
The application method of the environment-friendly hot-melt pencil paint adopts a rubber ring extrusion and suction coating method, and the pencil rod sequentially passes through a primer and a finish paint hopper, and is cooled to finish the pencil painting, wherein the temperature of the primer in the primer hopper is 210 ℃, and the temperature of the finish paint in the finish paint hopper is 190 ℃.
According to the painting requirements of different pencils, the painting frequency of the primer is 1 time, and the painting frequency of the finish paint is 3 times.
The invention has the following advantages: firstly, the adopted raw materials are environment-friendly, the production process is clean and environment-friendly, and no pollution is caused. Secondly, the painting efficiency is high, the performance of the coating is excellent, the curing time of the coating is less than 5min, and the heat-resistant temperature is more than 100 ℃. Thirdly, the product is safe and environment-friendly, and meets the requirements of European Union toy safety standard EN 71.
Claims (8)
1. The environment-friendly hot-melt pencil paint is characterized by comprising a primer and a finish, wherein the primer comprises, by mass, 25-30 parts of primer resin, 40-60 parts of filler and 5-10 parts of epoxidized soybean oil; the finishing paint comprises, by mass, 40-50 parts of finishing paint resin, 30-40 parts of pigment and 5-10 parts of epoxidized soybean oil;
the primer resin is one or a mixture of C5 petroleum resin and C9 petroleum resin in any proportion; the finishing resin is thermoplastic polyurethane.
2. The environment-friendly hot melt type pencil paint as claimed in claim 1, wherein the thermoplastic polyurethane is WANTHANE WHT-1164, WANTHANE WHT-1172 or WANTHANE WHT-1264.
3. The environment-friendly hot melt pencil paint as claimed in claim 1, wherein the pigment is an environment-friendly inorganic pigment or organic pigment with fineness greater than 2000 mesh.
4. The environment-friendly hot-melt pencil paint as claimed in claim 1, further comprising varnish, wherein the varnish comprises 80-90 parts by mass of finish resin and 5-10 parts by mass of epoxidized soybean oil.
5. The preparation method of the environment-friendly hot-melt pencil paint is characterized by comprising the following steps of:
(1) the preparation method of the primer comprises the following steps: uniformly mixing 25-30 parts by mass of primer resin, 40-60 parts by mass of filler and 5-10 parts by mass of epoxidized soybean oil to obtain a primer;
(2) the preparation method of the finish paint comprises the following steps: uniformly mixing 40-50 parts of finish paint resin, 30-40 parts of pigment and 5-10 parts of epoxidized soybean oil in parts by mass to obtain finish paint;
(3) the preparation method of the varnish comprises the following steps: uniformly mixing 80-90 parts of finish paint resin and 5-10 parts of epoxidized soybean oil in parts by mass to obtain varnish;
wherein the primer resin is one or a mixture of C5 petroleum resin and C9 petroleum resin in any proportion; the finishing resin is thermoplastic polyurethane.
6. The method for preparing an environment-friendly hot melt pencil paint as claimed in claim 5, wherein the pigment is an environment-friendly inorganic pigment or organic pigment with fineness greater than 2000 meshes.
7. The application method of the environment-friendly hot-melt pencil paint prepared by the method as claimed in claim 5 is characterized in that the pencil rod is sequentially passed through a hopper for primer, finish paint and varnish by adopting a rubber ring extrusion and suction coating method, and the pencil painting is completed after cooling, wherein the temperature of the primer in the primer hopper is kept between 180 ℃ and 220 ℃, and the temperature of the finish paint in the finish paint hopper and the temperature of the varnish in the varnish hopper are kept between 150 ℃ and 190 ℃.
8. The method for applying an environmentally friendly hot melt pencil paint as claimed in claim 7, wherein the number of times of applying the primer is 1-3, the number of times of applying the top-coat is 1-3, and the number of times of applying the clear coat is 0-2.
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|---|---|---|---|
| CN201810410623.4A CN108610870B (en) | 2018-05-02 | 2018-05-02 | Environment-friendly hot-melt pencil paint and preparation method and application method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106574146A (en) * | 2014-08-26 | 2017-04-19 | 汉高股份有限及两合公司 | Polyamide hot melt coating |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106574146A (en) * | 2014-08-26 | 2017-04-19 | 汉高股份有限及两合公司 | Polyamide hot melt coating |
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