CN109749588A - A kind of domestic ovens spraying environment-friendly type thermostable powdery paints - Google Patents
A kind of domestic ovens spraying environment-friendly type thermostable powdery paints Download PDFInfo
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- CN109749588A CN109749588A CN201811599115.1A CN201811599115A CN109749588A CN 109749588 A CN109749588 A CN 109749588A CN 201811599115 A CN201811599115 A CN 201811599115A CN 109749588 A CN109749588 A CN 109749588A
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Abstract
This application involves cooking toast food device fields, more particularly to a kind of domestic ovens for spraying environment-friendly type thermostable powdery paints, what is solved be domestic ovens in the prior art sprayings is common coating, harmful substance can be generated in baking process floating coat, coating heated discoloration is serious, the problem of coating is heated to be easy to fall off, poor heat resistance；In order to solve the above-mentioned technical problem, the embodiment of the present application discloses a kind of domestic ovens for spraying environment-friendly type thermostable powdery paints, wherein, the environment-friendly type thermostable powdery paints includes: by percentage to the quality, resin 40~60%, curing agent 1~5%, pigment 10~20%, auxiliary agent 1~5%, filler 20~30%, harmful substance low amounts is up to standard when achieving domestic ovens baking, and coating is heated to be basically unchanged color, coating is heated not easily to fall off, the technical effect of excellent heat resistance.
Description
Technical field
This application involves cooking toast food device field more particularly to a kind of spraying environment-friendly type thermostable powdery paints
Domestic ovens.
Background technique
Cooking toast food device has become the daily necessities of more and more families, and as people are to quality of the life
It is required that continuous improvement, the environmental requirement of cooking toast food device is also continuously improved, wherein for domestic ovens, this Shen
Please inventor during implementing the technical solution in the embodiment of the present application, at least there is following technology and ask in the discovery prior art
Topic:
1, domestic ovens spraying in the prior art is common coating, can generate nuisance in baking process floating coat
The problem of matter, coating heated discoloration is serious, and coating is heated to be easy to fall off, poor heat resistance.
Summary of the invention
It is common coating that technical problems to be solved in this application, which are domestic ovens in the prior art sprayings, is being toasted
The problem of process floating coat can generate harmful substance, and coating heated discoloration is serious, and coating is heated to be easy to fall off, poor heat resistance.
In order to solve the above-mentioned technical problem, the embodiment of the present application provides a kind of spraying environment-friendly type thermostable powdery paints
Domestic ovens.
In a first aspect, the embodiment of the present application provides a kind of domestic ovens for spraying environment-friendly type thermostable powdery paints, wherein
The environment-friendly type thermostable powdery paints includes: resin 40~60%, curing agent 1~5%, pigment 10 by percentage to the quality
~20%, auxiliary agent 1~5%, filler 20~30%.
Preferably, the environment-friendly type thermostable powdery paints includes: resin 50%, curing agent by percentage to the quality
5%, pigment 15%, auxiliary agent 4%, filler 26%.
Preferably, the resin includes: 0.6 part of polyester resin in terms of mass fraction, 0.4 part of silicone resin.
Preferably, the auxiliary agent includes: 0.25 part of levelling agent in terms of mass fraction, 0.25 part of catalyst, 0.5 part of wax powder.
Preferably, the filler includes: 0.2 part of mica powder in terms of mass fraction, 0.4 part of talcum powder, 0.4 part of molten silicon
Micro mist.
Second aspect, the embodiment of the present application provide a kind of preparation method of environment-friendly type thermostable powdery paints, wherein packet
It includes: following steps:
Premixing, resin, curing agent, pigment, auxiliary agent, filler are pre-mixed；Melting extrusion mixing, resin and solidification
Molecular level mixing is carried out after agent melting, pigment group is fractured into predecessor and is evenly dispersed in melting together with auxiliary agent
Resin in curing agent mixture, while the resin that is melted of the surface of pigment particles curing agent mixture wetting, then via
Double screw extruder hot-melt extruded；It is cooling, it is cooled down rapidly via the tabletting that cooling tablet press machine squeezes out；Broken, tabletting is through crusher
It is broken；Finely divided, broken tabletting is milled finely divided through ACM grinding machine；Sizing screening passes through ultrasonic activation screening grain
Diameter.
Preferably, the premixing time is 10~20min.
Preferably, at 60~70 DEG C, the discharge port temperature of extruder is not higher than for temperature control when the melting extrusion mixes
140 DEG C, extruder draw ratio is 15:1, revolving speed 300r/min.
Preferably, partial size when described finely divided by adjusting host and grading control after finely divided.
Preferably, control partial size is sieved by ultrasonic activation when the sizing screening.
Said one or multiple technical solutions in the embodiment of the present application at least have following one or more technology effects
Fruit:
1, technical solution general thought provided by the present application is as follows: by spraying environment-friendly type thermostable powdery paints, wherein
The environment-friendly type thermostable powdery paints includes: resin 40~60%, curing agent 1~5%, pigment 10 by percentage to the quality
~20%, auxiliary agent 1~5%, filler 20~30%, the resin are the main film forming substance of powdery paints；The curing agent with
The resin chemically reactive, the mechanical performance after enhancing powdery paints film；The pigment enhances the covering of film,
Improve the heat resistance of film；The filler enhances hardness of film, improves heat-resistance of film, solves in the prior art
Domestic ovens spraying is common coating, can generate harmful substance in baking process floating coat, coating heated discoloration is serious, coating
Heated to be easy to fall off, the problem of poor heat resistance, harmful substance low amounts is up to standard when achieving domestic ovens baking, and coating is heated basic
Non-discolouring, coating is heated not easily to fall off, the technical effect of excellent heat resistance.
Detailed description of the invention
Fig. 1 is a kind of powdery paints preparation side of the oven of spraying environment-friendly type thermostable powdery paints of the embodiment of the present application
The flow diagram of method.
Specific embodiment
The embodiment of the present application provides a kind of domestic ovens for spraying environment-friendly type thermostable powdery paints, provided by the present application
Technical solution general thought is as follows: by spraying environment-friendly type thermostable powdery paints, wherein the environment-friendly type thermostable powder applies
Material includes: resin 40~60%, curing agent 1~5%, pigment 10~20%, auxiliary agent 1~5%, filler by percentage to the quality
20~30%, the resin is the main film forming substance of powdery paints；The curing agent and the resin chemically reactive, enhancing
Mechanical performance after powdery paints film；The pigment enhances the covering of film, improves the heat resistance of film；It is described
Filler enhances hardness of film, improves heat-resistance of film, and solve domestic ovens spraying in the prior art is commonly to apply
Material, can generate harmful substance in baking process floating coat, and coating heated discoloration is serious, and coating is heated to be easy to fall off, poor heat resistance
The technical issues of, harmful substance low amounts is up to standard when achieving domestic ovens baking, and coating is heated to be basically unchanged color, and coating is heated not
It is easy to fall off, the technical effect of excellent heat resistance.
The technical issues of in order to solve the application and technical solution and technical effect are more clearly understood, below by way of
The application is described in detail in drawings and examples.Should be apparent, specific embodiment described herein is the application one
Divide embodiment, be only used to explain the application, is not used to limit the application, those skilled in the art are not paying creativeness
The every other embodiment obtained when labour belongs to the application protection scope, in the absence of conflict, the embodiment of the present application
And the technical characteristic in embodiment can be combined with each other.
, should be apparent in the description of the embodiment of the present application, term " center ", " in ", "upper", "lower", "left", "right",
The orientation or positional relationship of the instructions such as "inner", "outside", "top", "bottom", " side ", "vertical", "horizontal" is based on the figure
Orientation or positional relationship, description the embodiment of the present application merely for convenience and simplified description, rather than described in indication or suggestion
Device or element must have specific direction or positional relationship, that is, should not be understood as the limitation to the embodiment of the present application；In addition,
Term " one ", " first ", " second ", " third ", " the 4th " etc. are only used for facilitating description or simplify description, rather than indication or suggestion
Its importance.
, should be apparent in the description of the embodiment of the present application, unless otherwise specific regulation or limit, term " installation ",
" connected ", " connection " etc. shall be understood in a broad sense, and can be to be fixedly connected e.g., can be to be detachably connected, and can connect for globality；It can
It can be electrical connection for mechanical connection；It can be to be directly connected to, can be to be indirectly connected with, can be connection inside device or element.To ability
For field technique personnel, according to the concrete meaning of the apparent above-mentioned term of the embodiment of the present application concrete condition in the embodiment of the present application.
In the description of the embodiment of the present application, term "and/or", only it is a kind of describe affiliated partner incidence relation,
Indicate may exist three kinds of relationships, for example, A and/or B, can indicate: individualism A exists simultaneously A and B, individualism B this
Three kinds of situations.In addition, character "/" herein, typicallys represent the relationship that forward-backward correlation object is a kind of "or".
, should be apparent in the description of the embodiment of the present application, for simple and clear purpose, the principle of the embodiment of the present application
It is described by referring mainly to example, in the following description, many details of the embodiment of the present application are described to be used to mention
For a thorough understanding of embodiments, but to those skilled in the art, the embodiment of the present application is not limited to correlation in practice
Detail；In some embodiments, it is not described in known features and/or method, to avoid causing these embodiments difficult
To understand.
The embodiment of the present application provides a kind of domestic ovens for spraying environment-friendly type thermostable powdery paints, wherein the ring
Guarantor's type Heat Resistant Powder Coatings include: by percentage to the quality, resin 40~60%, curing agent 1~5%, pigment 10~20%,
Auxiliary agent 1~5%, filler 20~30%.
Wherein, the resin is the main film forming substance of powdery paints；The curing agent and the resin chemically reactive,
Mechanical performance after enhancing powdery paints film；The pigment enhances the covering of film, improves the heat resistance of film；
The filler enhances hardness of film, improves heat-resistance of film.
Further, the resin includes: 0.6 part of polyester resin in terms of mass fraction, 0.4 part of silicone resin.
Further, the curing agent includes: 1 part of three-glycidyl isocyanates in terms of mass fraction.
Further, the pigment includes: 1 part of iron oxide black in terms of mass fraction.
Further, the auxiliary agent includes: 0.25 part of levelling agent in terms of mass fraction, 0.25 part of catalyst, 0.5 part of wax
Powder.
Further, the filler includes: 0.2 part of mica powder in terms of mass fraction, 0.4 part of talcum powder, 0.4 part of melting
Silicon powder.
Wherein, the silicone resin enhances the heat resistance after powdery paints film；The levelling agent enhances powder painting
Planarization effects after expecting film, the catalyst accelerate powder curing of coating speed, and the wax powder improves powder painting
Hardness and surface abrasion resistance after material film；The mica powder enhances the heat resistance and gloss of powdery paints Tu Mohou, described
Talcum powder enhances heat resistance after powdery paints film, and the silicon powder enhances the heat resistance after powdery paints film.
Wherein, the polyester resin is the polyester resin of the functional group containing carboxyl end group and its acid value is 30 to 40, the silicon tree
Rouge is methyl phenyl silicone resin, and the polyester resin is formed by dihydric alcohol or binary acid or polyalcohol and polyacid polycondensation, described
Silicone resin is made by methyl trimethoxy oxosilane, dimethoxydiphenylsilane, zinc Isoocatanoate for primary raw material.
Wherein, the three-glycidyl isocyanates is by solid phase isocyanuric acid and liquid phase epoxidation chloropropane in catalyst action
Lower synthesis.
Wherein, the iron oxide black generates to be reacted by ferroso-ferric oxide and Mn oxide by high temperature lattice, wherein ferro element
Molar ratio with manganese element is 1.5:1 to 5:1.
Wherein, the levelling agent is esters of acrylic acid levelling agent, and specially Ningbo South-sea Chemical Co., Ltd. GLP588 is logical
With type levelling agent.
Wherein, the catalyst is praseodynium aluminium, to react the acetone synthesized by acetylacetone,2,4-pentanedione and aluminum oxide
Metal complex.
Based on identical inventive concept, the embodiment of the present application also provides a kind of preparations of environment-friendly type thermostable powdery paints
Method, wherein the following steps are included:
Premixing, resin, curing agent, pigment, auxiliary agent, filler are pre-mixed；Melting extrusion mixing, resin and solidification
Molecular level mixing is carried out after agent melting, pigment group is fractured into predecessor and is evenly dispersed in melting together with auxiliary agent
Resin in curing agent mixture, while the resin that is melted of the surface of pigment particles curing agent mixture wetting, then via
Double screw extruder hot-melt extruded；It is cooling, it is cooled down rapidly via the tabletting that cooling tablet press machine squeezes out；Broken, tabletting is through crusher
It is broken；Finely divided, broken tabletting is milled finely divided through ACM grinding machine；Sizing screening passes through ultrasonic activation screening partial size.
Wherein, the premixing step ensure that being sufficiently mixed for raw material, by powdery paints before melting extrusion mixing
Each component carry out premixing be very important significant process, decisive role is played to the performance of powdery paints, especially
It is the auxiliary agent and pigment less to dosage, if premixing is insufficient, can not be compensated in melting extrusion mixing step；Institute
Stating melting extrusion mixing step ensure that the abundant melting mixing of raw material；The cooling step ensure that the raw material of melting extrusion just
In being pressed into sheet；The destruction step ensure that and can sufficiently be crushed to tabletting in latter finely divided step；It is described thin
Pulverising step ensure that the abundant crushing of tabletting to sift out the powder of enough appropriate particle sizes in latter sizing screening step
End；The sizing screening step ensure that the partial size of finally obtained powder is suitable, convenient for construction.
Further, the premixing time is 10~20min.
Further, at 120~150 DEG C, the set temperature of extruder is controlled for temperature control when the melting extrusion mixes
At 60~70 DEG C, discharge port temperature is not higher than 140 DEG C, and extruder draw ratio is 15:1, revolving speed 300r/min.
Further, the cooling step specifically: lead to ice water in the roller of the cooling tablet press machine, by twin-screw extrusion
The melting tabletting that machine squeezes out cools down rapidly after the roller pressure roller via cooling tablet press machine.
Further, partial size when described finely divided by adjusting host and grading control after finely divided.
Further, sieving control partial size by ultrasonic activation when the sizing screening will be compared with coarse grain by the screen to filtrate
The removal of diameter powder, obtained powdery paints partial size is 18~22 μm, so that powder coating particles particle size interval span is relatively narrow, particle
Uniformly, it so that film caudacoria is had excellent performance, and constructs convenient for client.
Wherein, the partial size of the coating of oven spraying in the prior art is generally 35~40 μm, causes to combine between particle
It is not close fineless and smooth, coating layer thickness increase is eventually led to, is differed at 80~100 μm, and the experiment proved that, coating layer thickness is at 40 μm
It is best for controlling, 18~22 μm of this powdery paints partial size, with a thickness of 20~40 μm after coating.
A kind of domestic ovens of the spraying environment-friendly type thermostable powdery paints of the embodiment of the present application, it is resistance to by spraying environment-friendly type
High temperature powder coating, wherein the environment-friendly type thermostable powdery paints includes: that by percentage to the quality, resin 40~60% is consolidated
Agent 1~5%, pigment 10~20%, auxiliary agent 1~5%, filler 20~30%, the resin are the main film forming of powdery paints
Substance；The curing agent and the resin chemically reactive, the mechanical performance after enhancing powdery paints film；The pigment increases
The strong covering of film, improves the heat resistance of film；The filler enhances hardness of film, improves heat-resistance of film,
Solve domestic ovens spraying in the prior art is common coating, can generate harmful substance in baking process floating coat, apply
The problem of layer heated discoloration is serious, and coating is heated to be easy to fall off, poor heat resistance, harmful substance is big when achieving domestic ovens baking
Amount is reduced and low amounts is up to standard, and coating is heated to be basically unchanged color, and coating is heated not easily to fall off, the technical effect of excellent heat resistance.
[embodiment]
The application implements 1 to 19 and provides a kind of domestic ovens for spraying environment-friendly type thermostable powdery paints, wherein described
Environment-friendly type thermostable powdery paints includes: resin, curing agent, pigment, auxiliary agent, filler, and each component content is as shown in Table 1 (with matter
Measure percentages).
Table one
Wherein, the resin is the main film forming substance of powdery paints；The curing agent and the resin chemically reactive,
Mechanical performance after enhancing powdery paints film；The pigment enhances the covering of film, improves the heat resistance of film；
The filler enhances hardness of film, improves heat-resistance of film.
Further, the resin includes: 0.6 part of polyester resin in terms of mass fraction, 0.4 part of silicone resin.
Further, the curing agent includes: 1 part of three-glycidyl isocyanates in terms of mass fraction.
Further, the pigment includes: 1 part of iron oxide black in terms of mass fraction.
Further, the auxiliary agent includes: 0.25 part of levelling agent in terms of mass fraction, 0.25 part of catalyst, 0.5 part of wax
Powder.
Further, the filler includes: 0.2 part of mica powder in terms of mass fraction, 0.4 part of talcum powder, 0.4 part of melting
Silicon powder.
Wherein, the heat resistance of the silicone resin enhanced after powdery paints film；The levelling agent enhances powder
Planarization effects after coating film, the catalyst accelerate powder curing of coating speed, and the wax powder improves powder
Hardness and surface abrasion resistance after coating film；The mica powder enhances the heat resistance and gloss of powdery paints Tu Mohou, institute
It states talcum powder and enhances heat resistance after powdery paints film, the silicon powder enhances the temperature tolerance after powdery paints film
Energy.
Wherein, the polyester resin is the polyester resin of the functional group containing carboxyl end group and its acid value is 30 to 40, the silicon tree
Rouge is methyl phenyl silicone resin, and the polyester resin is formed by dihydric alcohol or binary acid or polyalcohol and polyacid polycondensation, described
Silicone resin is made by methyl trimethoxy oxosilane, dimethoxydiphenylsilane, zinc Isoocatanoate for primary raw material.
Wherein, the three-glycidyl isocyanates is by solid phase isocyanuric acid and liquid phase epoxidation chloropropane in catalyst action
Lower synthesis.
Wherein, the iron oxide black generates to be reacted by ferroso-ferric oxide and Mn oxide by high temperature lattice, wherein ferro element
Molar ratio with manganese element is 1.5:1 to 5:1.
Wherein, the levelling agent is esters of acrylic acid levelling agent, and specially Ningbo South-sea Chemical Co., Ltd. GLP588 is logical
With type levelling agent.
Wherein, the catalyst is praseodynium aluminium, to react the acetone synthesized by acetylacetone,2,4-pentanedione and aluminum oxide
Metal complex.
Based on identical inventive concept, the embodiment of the present application 1 to 19 additionally provides a kind of environment-friendly type thermostable powdery paints
Preparation method, wherein the following steps are included:
Premixing, resin, curing agent, pigment, auxiliary agent, filler are pre-mixed；Melting extrusion mixing, resin and solidification
Molecular level mixing is carried out after agent melting, pigment group is fractured into predecessor and is evenly dispersed in melting together with auxiliary agent
Resin in curing agent mixture, while the resin that is melted of the surface of pigment particles curing agent mixture wetting, then via
Double screw extruder hot-melt extruded；It is cooling, it is cooled down rapidly via the tabletting that cooling tablet press machine squeezes out；Broken, tabletting is through crusher
It is broken；Finely divided, broken tabletting is milled finely divided through ACM grinding machine；Sizing screening passes through ultrasonic activation screening grain
Diameter.
Wherein, the premixing step ensure that being sufficiently mixed for raw material, by powdery paints before melting extrusion mixing
Each component carry out premixing be very important significant process, decisive role is played to the performance of powdery paints, especially
It is the auxiliary agent and pigment less to dosage, if premixing is insufficient, can not be compensated in melting extrusion mixing step；Institute
Stating melting extrusion mixing step ensure that the abundant melting mixing of raw material；The cooling step ensure that the raw material of melting extrusion just
In being pressed into sheet；The destruction step ensure that and can sufficiently be crushed to tabletting in latter finely divided step；It is described thin
Pulverising step ensure that the abundant crushing of tabletting to sift out the powder of enough appropriate particle sizes in latter sizing screening step
End；The sizing screening step ensure that the partial size of finally obtained powder is suitable, convenient for construction.
The related process parameters of each step are as shown in Table 2.
Table two
Further, extruder draw ratio is 15:1, revolving speed 300r/min.
Further, the cooling step specifically: lead to ice water in the roller of the cooling tablet press machine, by twin-screw extrusion
The melting tabletting that machine squeezes out cools down rapidly after the roller pressure roller via cooling tablet press machine.
Further, partial size when described finely divided by adjusting host and grading control after finely divided.
Further, sieving control partial size by ultrasonic activation when the sizing screening will be compared with coarse grain by the screen to filtrate
The removal of diameter powder, obtained powdery paints partial size is 18~22 μm, so that powder coating particles particle size interval span is relatively narrow, particle
Uniformly, it so that film caudacoria is had excellent performance, and constructs convenient for client.
Wherein, the partial size of the coating of oven spraying in the prior art is generally 35~40 μm, causes to combine between particle
It is not close fineless and smooth, coating layer thickness increase is eventually led to, is differed at 80~100 μm, and the experiment proved that, coating layer thickness is at 40 μm
It is best for controlling, 18~22 μm of this powdery paints partial size, with a thickness of 20~40 μm after coating.
The domestic ovens of a kind of spraying environment-friendly type thermostable powdery paints of the embodiment of the present application 1 to 19, by spraying ring
Guarantor's type Heat Resistant Powder Coatings, wherein the environment-friendly type thermostable powdery paints include: by percentage to the quality, resin 40~
60%, curing agent 1~5%, pigment 10~20%, auxiliary agent 1~5%, filler 20~30%, the resin are the master of powdery paints
Want film forming matter；The curing agent and the resin chemically reactive, the mechanical performance after enhancing powdery paints film；It is described
Pigment enhances the covering of film, improves the heat resistance of film；The filler enhances hardness of film, and it is resistance to improve film
Hot, solve domestic ovens spraying in the prior art is common coating, can generate nuisance in baking process floating coat
The problem of matter, coating heated discoloration is serious, and coating is heated to be easy to fall off, poor heat resistance achieves harmful when domestic ovens baking
Substance largely reduces and low amounts is up to standard, and coating is heated to be basically unchanged color, and coating is heated not easily to fall off, the technology effect of excellent heat resistance
Fruit.
By using the instrument of detection ROHS to a kind of spraying environment-friendly type thermostable powdery paints of the embodiment of the present application
Domestic ovens are detected, and coherent detection data are obtained.
By using color difference instrument to the oven of spraying environment-friendly type thermostable powdery paints of the embodiment of the present application a kind of into
Row detection, obtains coherent detection situation.
Heating is carried out by using Muffle furnace and cross-cut tester carries out adhesive force detection, obtains coherent detection situation.
The detailed impression data of embodiment 1 to 19 and comparative example 1 to 10 are as shown in Table 3.
Table three
Can unambiguously it be found out by above-mentioned detection data, a kind of spraying environment-friendly type of the embodiment of the present application 1 to 19
Every harmful substance of the domestic ovens of Heat Resistant Powder Coatings is largely reduced compared with other ovens and low amounts is up to standard.
Can unambiguously it be found out by above-mentioned detection case, a kind of spraying environment-friendly type of the embodiment of the present application 1 to 19
Color difference is respectively less than the oven for spraying general coating after the coating of the oven of Heat Resistant Powder Coatings is heated.
Can unambiguously it be found out by above-mentioned detection case, a kind of spraying environment-friendly type of the embodiment of the present application 1 to 19
It is not easily to fall off after the coating of the oven of high temperature powder coating is heated.
[optimum embodiment]
The embodiment of the present application provides a kind of domestic ovens for spraying environment-friendly type thermostable powdery paints, wherein the ring
Guarantor's type Heat Resistant Powder Coatings include: that by percentage to the quality, resin 50%, pigment 15%, auxiliary agent 4%, is filled out curing agent 5%
Material 26%.
Wherein, the resin is the main film forming substance of powdery paints；The curing agent and the resin chemically reactive,
Mechanical performance after enhancing powdery paints film；The pigment enhances the covering of film, improves the heat resistance of film；
The filler enhances hardness of film, improves heat-resistance of film.
Further, the resin includes: 0.6 part of polyester resin in terms of mass fraction, 0.4 part of silicone resin.
Further, the curing agent includes: 1 part of three-glycidyl isocyanates in terms of mass fraction.
Further, the pigment includes: 1 part of iron oxide black in terms of mass fraction.
Further, the auxiliary agent includes: 0.25 part of levelling agent in terms of mass fraction, 0.25 part of catalyst, 0.5 part of wax
Powder.
Further, the filler includes: 0.2 part of mica powder in terms of mass fraction, 0.4 part of talcum powder, 0.4 part of melting
Silicon powder.
Wherein, the heat resistance of the silicone resin enhanced after powdery paints film；The levelling agent enhances powder
Planarization effects after coating film, the catalyst accelerate powder curing of coating speed, and the wax powder improves powder
Hardness and surface abrasion resistance after coating film；The mica powder enhances the heat resistance and gloss of powdery paints Tu Mohou, institute
It states talcum powder and enhances heat resistance after powdery paints film, the silicon powder enhances the temperature tolerance after powdery paints film
Energy.
Wherein, the polyester resin is the polyester resin of the functional group containing carboxyl end group and its acid value is 30 to 40, the silicon tree
Rouge is methyl phenyl silicone resin, and the polyester resin is formed by dihydric alcohol or binary acid or polyalcohol and polyacid polycondensation, described
Silicone resin is made by methyl trimethoxy oxosilane, dimethoxydiphenylsilane, zinc Isoocatanoate for primary raw material.
Wherein, the three-glycidyl isocyanates is by solid phase isocyanuric acid and liquid phase epoxidation chloropropane in catalyst action
Lower synthesis.
Wherein, the iron oxide black generates to be reacted by ferroso-ferric oxide and Mn oxide by high temperature lattice, wherein ferro element
Molar ratio with manganese element is 1.5:1 to 5:1.
Wherein, the levelling agent is esters of acrylic acid levelling agent, and specially Ningbo South-sea Chemical Co., Ltd. GLP588 is logical
With type levelling agent.
Wherein, the catalyst is praseodynium aluminium, to react the acetone synthesized by acetylacetone,2,4-pentanedione and aluminum oxide
Metal complex.
Based on identical inventive concept, the embodiment of the present application also provides a kind of preparations of environment-friendly type thermostable powdery paints
Method, wherein the following steps are included:
Premixing, resin, curing agent, pigment, auxiliary agent, filler are pre-mixed；Melting extrusion mixing, resin and solidification
Molecular level mixing is carried out after agent melting, pigment group is fractured into predecessor and is evenly dispersed in melting together with auxiliary agent
Resin in curing agent mixture, while the resin that is melted of the surface of pigment particles curing agent mixture wetting, then via
Double screw extruder hot-melt extruded；It is cooling, it is cooled down rapidly via the tabletting that cooling tablet press machine squeezes out；Broken, tabletting is through crusher
It is broken；Finely divided, broken tabletting is milled finely divided through ACM grinding machine；Sizing screening passes through ultrasonic activation screening grain
Diameter.
Wherein, the premixing step ensure that being sufficiently mixed for raw material, by powdery paints before melting extrusion mixing
Each component carry out premixing be very important significant process, decisive role is played to the performance of powdery paints, especially
It is the auxiliary agent and pigment less to dosage, if premixing is insufficient, can not be compensated in melting extrusion mixing step；Institute
Stating melting extrusion mixing step ensure that the abundant melting mixing of raw material；The cooling step ensure that the raw material of melting extrusion just
In being pressed into sheet；The destruction step ensure that and can sufficiently be crushed to tabletting in latter finely divided step；It is described thin
Pulverising step ensure that the abundant crushing of tabletting to sift out the powder of enough appropriate particle sizes in latter sizing screening step
End；The sizing screening step ensure that the partial size of finally obtained powder is suitable, convenient for construction.
Further, the premixing time is 14min.
Further, at 137 DEG C, the set temperature of extruder is controlled 59 for temperature control when the melting extrusion mixes
DEG C, discharge port temperature is not higher than 140 DEG C, and extruder draw ratio is 15:1, revolving speed 300r/min.
Further, the cooling step specifically: lead to ice water in the roller of the cooling tablet press machine, by twin-screw extrusion
The melting tabletting that machine squeezes out cools down rapidly after the roller pressure roller via cooling tablet press machine.
Further, partial size when described finely divided by adjusting host and grading control after finely divided.
Further, sieving control partial size by ultrasonic activation when the sizing screening will be compared with coarse grain by the screen to filtrate
The removal of diameter powder, obtained powdery paints partial size is 18~22 μm, so that powder coating particles particle size interval span is relatively narrow, particle
Uniformly, it so that film caudacoria is had excellent performance, and constructs convenient for client.
Wherein, the partial size of the coating of oven spraying in the prior art is generally 35~40 μm, causes to combine between particle
It is not close fineless and smooth, coating layer thickness increase is eventually led to, is differed at 80~100 μm, and the experiment proved that, coating layer thickness is at 40 μm
It is best for controlling, 18~22 μm of this powdery paints partial size, with a thickness of 20~40 μm after coating.
A kind of domestic ovens of the spraying environment-friendly type thermostable powdery paints of the embodiment of the present application, it is resistance to by spraying environment-friendly type
High temperature powder coating, wherein the environment-friendly type thermostable powdery paints includes: resin 50%, curing agent by percentage to the quality
5%, pigment 15%, auxiliary agent 4%, filler 26%, the resin are the main film forming substance of powdery paints；The curing agent and institute
Resin chemically reactive is stated, the mechanical performance after enhancing powdery paints film；The pigment enhances the covering of film, mentions
The high heat resistance of film；The filler enhances hardness of film, improves heat-resistance of film, solves family in the prior art
With oven spray be common coating, harmful substance can be generated in baking process floating coat, coating heated discoloration is serious, coating by
The problem of thermal capacitance is easy to fall off, poor heat resistance, harmful substance largely reduces when achieving domestic ovens baking and low amounts is up to standard, coating
Heated to be basically unchanged color, coating is heated not easily to fall off, the technical effect of excellent heat resistance.
It is possible to further prove above-mentioned technical effect by following experimental data.
By using the instrument of detection ROHS to a kind of spraying environment-friendly type thermostable powdery paints of the embodiment of the present application
Domestic ovens are detected, and coherent detection data are obtained.
By using color difference instrument to the oven of spraying environment-friendly type thermostable powdery paints of the embodiment of the present application a kind of into
Row detection, obtains coherent detection situation.
Heating is carried out by using Muffle furnace and cross-cut tester carries out adhesive force detection, obtains coherent detection situation.
The detailed impression data of optimum embodiment are as shown in Table 4.
Table four
Can unambiguously it be found out by above-mentioned detection data, a kind of spraying environment-friendly type of the application optimum embodiment is resistance to
Every harmful substance of the domestic ovens of high temperature powder coating is largely reduced compared with other ovens and low amounts is up to standard.
Can unambiguously it be found out by above-mentioned detection case, a kind of spraying environment-friendly type of the application optimum embodiment is resistance to
Color difference is respectively less than the oven for spraying general coating after the coating of the oven of high temperature powder coating is heated.
Can unambiguously it be found out by above-mentioned detection case, a kind of spraying environment-friendly type of the application optimum embodiment is high
It is not easily to fall off after the coating of the oven of warm powdery paints is heated.
Although being described above to the being illustrated property of specific embodiment of the application, in order to those skilled in the art
It will be appreciated that the application, but the application is not limited only to the range of specific embodiment, to those skilled in the art
For, as long as various change is in the application spirit and scope that the attached claims limit and determine, all utilize this Shen
The innovation and creation that please be conceived are in the column of protection.
Claims (10)
1. a kind of domestic ovens for spraying environment-friendly type thermostable powdery paints, wherein the environment-friendly type thermostable powdery paints packet
It includes: by percentage to the quality, resin 40~60%, curing agent 1~5%, pigment 10~20%, auxiliary agent 1~5%, filler 20~
30%.
2. a kind of domestic ovens for spraying environment-friendly type thermostable powdery paints according to claim 1, wherein the environmental protection
Type Heat Resistant Powder Coatings include: resin 50%, curing agent 5%, pigment 15%, auxiliary agent 4%, filler by percentage to the quality
26%.
3. a kind of domestic ovens for spraying environment-friendly type thermostable powdery paints according to claim 1, wherein the resin
It include: 0.6 part of polyester resin in terms of mass fraction, 0.4 part of silicone resin.
4. a kind of domestic ovens for spraying environment-friendly type thermostable powdery paints according to claim 1, wherein the auxiliary agent
It include: 0.25 part of levelling agent in terms of mass fraction, 0.25 part of catalyst, 0.5 part of wax powder.
5. a kind of domestic ovens for spraying environment-friendly type thermostable powdery paints according to claim 1, wherein the filler
It include: 0.2 part of mica powder in terms of mass fraction, 0.4 part of talcum powder, 0.4 part of melting silicon powder.
6. a kind of preparation method of environment-friendly type thermostable powdery paints, is used to prepare the resistance to height of environment-friendly type described in Claims 1 to 5
Warm powdery paints, wherein the following steps are included:
Premixing, resin, curing agent, pigment, auxiliary agent, filler are pre-mixed；
Melting extrusion mixing carries out molecular level after the melting of resin and curing agent and mixes, pigment group be fractured into predecessor and with
Auxiliary agent be evenly dispersed in together melting resin in curing agent mixture, while the tree that the surface of pigment particles is melted
Rouge curing agent mixture wetting, then via double screw extruder hot-melt extruded；
It is cooling, it is cooled down rapidly via the tabletting that cooling tablet press machine squeezes out；
Broken, tabletting is through broken crusher machine；
Finely divided, broken tabletting is milled finely divided through ACM grinding machine；
Sizing screening passes through ultrasonic activation screening partial size.
7. a kind of preparation method of environment-friendly type thermostable powdery paints according to claim 6, wherein when the premixing
Between be 10~20min.
8. a kind of preparation method of environment-friendly type thermostable powdery paints according to claim 6, wherein the melting extrusion
Temperature control is at 60~70 DEG C when mixing, and the discharge port temperature of extruder is not higher than 140 DEG C, and extruder draw ratio is 15:1, turns
Speed is 300r/min.
9. a kind of preparation method of environment-friendly type thermostable powdery paints according to claim 6, wherein when described finely divided
By adjusting the partial size of host and grading control after finely divided.
10. a kind of preparation method of environment-friendly type thermostable powdery paints according to claim 6, wherein the classifying screen
Control partial size is sieved by ultrasonic activation when selecting.
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| CN111057466A (en) * | 2019-12-30 | 2020-04-24 | 江南载福粉末涂料（张家港）有限公司 | High-temperature-resistant powder coating |
| CN111607314A (en) * | 2020-06-24 | 2020-09-01 | 庞贝捷粉末涂料(上海)有限公司 | Powder coating |
| CN115141534A (en) * | 2021-03-30 | 2022-10-04 | 浙江天喜厨电股份有限公司 | Microwave oven and manufacturing method thereof |
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