CN112063264A - Heat dissipation powder coating and preparation method thereof - Google Patents
Heat dissipation powder coating and preparation method thereof Download PDFInfo
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- CN112063264A CN112063264A CN202010811368.1A CN202010811368A CN112063264A CN 112063264 A CN112063264 A CN 112063264A CN 202010811368 A CN202010811368 A CN 202010811368A CN 112063264 A CN112063264 A CN 112063264A
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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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/4007—Curing agents not provided for by the groups C08G59/42 - C08G59/66
- C08G59/4014—Nitrogen containing compounds
- C08G59/4042—Imines; Imides
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/50—Amines
- C08G59/5006—Amines aliphatic
- C08G59/502—Polyalkylene polyamines
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/50—Amines
- C08G59/504—Amines containing an atom other than nitrogen belonging to the amine group, carbon and hydrogen
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/50—Amines
- C08G59/5046—Amines heterocyclic
- C08G59/5053—Amines heterocyclic containing only nitrogen as a heteroatom
- C08G59/5073—Amines heterocyclic containing only nitrogen as a heteroatom having two nitrogen atoms in the ring
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/50—Amines
- C08G59/56—Amines together with other curing agents
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- 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
- C09D5/031—Powdery paints characterised by particle size or shape
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- C—CHEMISTRY; METALLURGY
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- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/08—Materials not undergoing a change of physical state when used
- C09K5/14—Solid materials, e.g. powdery or granular
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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
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
Abstract
The invention relates to the field of powder coatings, in particular to a heat dissipation powder coating and a preparation method thereof. One or a mixture of diamino diphenyl sulfone DDS HT-976 or diamino diphenyl methane DDM HT-972 DEH-50, phthalimide, polyethylene polyamine PEPA or aminoethyl piperazine AE is added into epoxy resin and saturated polyester, so that modified epoxy resin is obtained, has high temperature resistance, acid resistance and water resistance, can meet the requirements of convenient heat dissipation, no decomposition in case of high temperature, acid corrosion resistance and no easy shedding in case of water, has excellent heat resistance, can meet the heat dissipation requirements of various high-power objects, and does not have the problem of decomposition in case of heat; the heat dissipation powder coating also has extremely high acid resistance and water resistance, is not easy to corrode in an acid environment, and prevents the condition that a powder coating is corroded to influence the spraying of an object.
Description
Technical Field
The invention relates to the field of powder coatings, in particular to a heat dissipation powder coating and a preparation method thereof.
Background
The powder coating is a solid powder synthetic resin coating composed of solid resin, pigment, filler, auxiliary agent and the like. Unlike conventional solvent-based coatings and water-based coatings, the dispersion medium is not a solvent and water, but air. It has the characteristics of no solvent pollution, 100 percent film forming and low energy consumption. The powder coating is in a completely different form from general coating, and it exists in a state of fine powder. Since no solvent is used, it is called a powder coating. The powder coating is mainly characterized in that: has the characteristics of harmlessness, high efficiency, resource saving and environmental protection.
The common powder coating has poor heat resistance due to the defects of the self structure, so that the heat dissipation of a sprayed object is influenced; meanwhile, the traditional powder coating has poor acid resistance and water resistance, and can be corroded after being used for a period of time, so that the original function of the powder coating is lost.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a heat-dissipating powder coating and a preparation method thereof aiming at the technical defects, wherein the heat-dissipating powder coating has excellent heat resistance, can meet the heat-dissipating requirements of various high-power objects, and does not have the problem of decomposition under heat; the heat dissipation powder coating also has extremely high acid resistance and water resistance, is not easy to corrode in an acid environment, and prevents the condition that a powder coating is corroded to influence the spraying of an object.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a heat dissipation powder coating and a preparation method thereof are characterized in that: the raw materials comprise the following components in parts by weight: 200-240 parts of epoxy resin, 200-240 parts of saturated polyester resin, 25-30 parts of curing agent, 150-180 parts of pigment and filler and 15-18 parts of auxiliary agent;
wherein the curing agent is a mixture of aromatic polyamine, polyamide and aliphatic amine;
the aromatic polyamine is selected from diaminodiphenyl sulfone DDS HT-976 or diaminodiphenyl methane DDM HT-972 DEH-50, the polyamide is selected from phthalimide, the aliphatic amine is selected from polyethylene polyamine PEPA or aminoethyl piperazine AE, wherein the aromatic polyamine: polyamide: the weight portion ratio of the aliphatic amines is 2: 2: 1.
the heat dissipation powder coating adopts the following synthesis steps of the curing agent:
(1) adding Diamino Diphenyl Sulfone (DDS) HT-976, phthalimide and polyethylene polyamine (PEPA) into a high-speed mixing stirrer according to the weight part ratio, and fully stirring and mixing for 10-15 min;
(2) heating the stirred mixture to 100-140 ℃ and preserving the heat for 1 hour at the temperature;
(3) after the stirred materials are mixed and cooled, adding epoxy resin, saturated polyester resin, pigment and filler and an auxiliary agent into the stirred mixture according to the weight part of the formula;
(4) putting the uniformly stirred and mixed materials into a double-screw extruder at the temperature of 100-120 ℃, and heating, melting and mixing the materials by the extruder to obtain a molten extrudate;
(5) extruding the melt obtained in the last step, cooling and tabletting the extruded melt by a stainless steel cooling roller pair, and slicing the extruded melt to obtain slices with the thickness of 2-4 mm;
(6) further cooling the large sheets by a steel belt and conveying the large sheets to a primary crushing area, and primarily crushing the large sheets by a wolf tooth stick pair roller to obtain sheets with the size of 1-3cm and the thickness of 2-4 mm;
(7) and (3) putting the primarily crushed slices into an ACM (Acetobacter asiaticum) pulverizer to be crushed, screening by a cyclone separator, and further screening by a rotary screen with a certain mesh number to obtain the heat dissipation powder coating.
Further optimizing the technical scheme, the auxiliary agent comprises one or more of polyacrylate, silicon-containing acrylate and polyvinyl butyral.
Further optimizing the technical scheme, the particle diameter of the heat dissipation powder coating in the step (7) is about 45 mu m.
Compared with the prior art, the invention has the beneficial effects that: according to the heat dissipation type powder coating provided by the invention, one or a mixture of diaminodiphenyl sulfone DDS HT-976 or diaminodiphenyl methane DDM HT-972 DEH-50, phthalimide, polyethylene polyamine PEPA or aminoethyl piperazine AE is added into epoxy resin and saturated polyester, so that the modified epoxy resin is obtained, has high temperature resistance, acid resistance and water resistance, and can meet the requirements of convenience in heat dissipation, no decomposition in high temperature, acid corrosion resistance and difficulty in falling off in water.
Drawings
Fig. 1 is a test result chart of a heat-dissipating powder coating and a method for preparing the same.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The specific implementation mode is as follows: referring to fig. 1, a heat dissipation powder coating and a preparation method thereof, the heat dissipation powder coating comprises the following raw materials in parts by weight: 200-240 parts of epoxy resin, 200-240 parts of saturated polyester resin, 25-30 parts of curing agent, 150-180 parts of pigment and filler and 15-20 parts of auxiliary agent;
the heat dissipation powder coating adopts the following synthesis steps of the curing agent:
(1) adding Diamino Diphenyl Sulfone (DDS) HT-976, phthalimide and polyethylene polyamine (PEPA) into a high-speed mixing stirrer according to the weight part ratio, and fully stirring and mixing for 10-15 min;
(2) heating the stirred mixture to 100-140 ℃ and preserving the heat for 1 hour at the temperature;
(3) adding epoxy resin, saturated polyester resin, pigment and filler and an auxiliary agent into the stirred mixture according to the weight part of the formula;
(4) putting the uniformly stirred and mixed materials into a double-screw extruder at the temperature of 100-120 ℃, and heating, melting and mixing the materials by the extruder to obtain a molten extrudate;
(5) extruding the melt obtained in the last step, cooling and slicing the melt by a stainless steel cooling roller pair to obtain a slice with the thickness of 2-4 mm;
(6) further cooling the large sheets by a steel belt and conveying the large sheets to a primary crushing area, and primarily crushing the large sheets by a wolf tooth stick pair roller to obtain sheets with the size of 1-3cm and the thickness of 2-4 mm;
(7) and (3) putting the primarily crushed slices into an ACM (Acetobacter asiaticum) pulverizer to be crushed, screening by a cyclone separator, and further screening by a rotary screen with a certain mesh number to obtain the heat dissipation powder coating.
The auxiliary agent comprises one or more of polyacrylate, silicon-containing acrylate and polyvinyl butyral.
The particle diameter of the heat dissipation powder coating is about 45 mu m.
The invention has the beneficial effects that: according to the heat dissipation type powder coating provided by the invention, one or a mixture of diaminodiphenyl sulfone DDS HT-976 or diaminodiphenyl methane DDM HT-972 DEH-50, phthalimide, polyethylene polyamine PEPA or aminoethyl piperazine AE is added into epoxy resin and saturated polyester, so that the modified epoxy resin is obtained, has high temperature resistance, acid resistance and water resistance, and can meet the requirements of convenience in heat dissipation, no decomposition in high temperature, acid corrosion resistance and difficulty in falling off in water.
In order to facilitate understanding of the heat dissipating powder coating and the method for preparing the same provided by the embodiments of the present invention, the following detailed description is given with reference to specific examples.
Example 1:
a heat dissipation powder coating comprises the following components in parts by weight:
200 parts of epoxy resin, 200 parts of saturated polyester, 200 parts of diamino diphenyl sulfone DDS HT-97610 parts, 10 parts of phthalimide, 5 parts of polyethylene polyamine PEPA, 150 parts of pigment and filler and 15 parts of auxiliary agent.
The preparation method of the heat dissipation powder coating comprises the following steps:
(1) diaminodiphenyl sulfone DDS HT-976, phthalimide and polyethylene polyamine PEPA are mixed according to the weight part of 10: 10: 5, adding the mixture into a high-speed mixing stirrer, and fully stirring and mixing for 10 min;
(2) heating the stirred mixture to 100 ℃ and maintaining the temperature at this temperature for 1 hour;
(3) adding epoxy resin, saturated polyester resin, pigment and filler and an auxiliary agent into the stirred mixture according to the weight part of the formula;
(4) putting the uniformly stirred and mixed materials into a 100 ℃ double-screw extruder, and heating, melting and mixing the materials by the extruder to obtain a molten extrudate;
(5) extruding the melt obtained in the last step, cooling and tabletting the extruded melt by a stainless steel cooling roller pair, and slicing the extruded melt to obtain slices with the thickness of 2-4 mm;
(6) further cooling the large sheets by a steel belt and conveying the large sheets to a primary crushing area, and primarily crushing the large sheets by a wolf tooth stick pair roller to obtain sheets with the size of 1-3cm and the thickness of 2-4 mm;
(7) and (3) putting the primarily crushed slices into an ACM (Acetobacter asiaticum) pulverizer to be crushed, screening by a cyclone separator, and further screening by a rotary screen with a certain mesh number to obtain the heat dissipation powder coating.
Example 2;
a heat dissipation powder coating comprises the following components in parts by weight:
240 parts of epoxy resin, 240 parts of saturated polyester, 240 parts of diamino diphenyl sulfone DDS HT-97612 parts, 12 parts of phthalimide, 6 parts of polyethylene polyamine PEPA, 180 parts of pigment and filler and 18 parts of auxiliary agent.
The preparation method of the heat dissipation powder coating comprises the following steps:
(1) diamino diphenyl sulfone DDS HT-976, phthalimide and polyethylene polyamine PEPA according to the weight part of 12: 12: 6, adding the mixture into a high-speed mixing stirrer, and fully stirring and mixing for 10 min;
(2) heating the stirred mixture to 140 ℃ and maintaining the temperature at that temperature for 1 hour;
(3) adding epoxy resin, saturated polyester resin, pigment and filler and an auxiliary agent into the stirred mixture according to the weight part of the formula;
(4) putting the uniformly stirred and mixed material into a 120 ℃ double-screw extruder, and heating, melting and mixing the material by the extruder to obtain a molten extrudate;
(5) extruding the melt obtained in the last step, cooling and tabletting the extruded melt by a stainless steel cooling roller pair, and slicing the extruded melt to obtain slices with the thickness of 2-4 mm;
(6) further cooling the large sheets by a steel belt and conveying the large sheets to a primary crushing area, and primarily crushing the large sheets by a wolf tooth stick pair roller to obtain sheets with the size of 1-3cm and the thickness of 2-4 mm;
(7) and (3) putting the primarily crushed slices into an ACM (Acetobacter asiaticum) pulverizer to be crushed, screening by a cyclone separator, and further screening by a rotary screen with a certain mesh number to obtain the heat dissipation powder coating.
Example 3:
a heat dissipation powder coating comprises the following components in parts by weight:
220 parts of epoxy resin, 220 parts of saturated polyester, 220 parts of diamino diphenyl sulfone DDS HT-97611 parts, 11 parts of phthalimide, 5.5 parts of polyethylene polyamine PEPA, 198 parts of pigment and filler and 16.5 parts of auxiliary agent.
The preparation method of the heat dissipation powder coating comprises the following steps:
(1) diamino diphenyl sulfone DDS HT-976, phthalimide and polyethylene polyamine PEPA are mixed according to the weight portion of 11: 11: 5.5 adding into a high-speed mixing stirrer, and fully stirring and mixing for 12 min;
(2) heating the stirred mixture to 140 ℃ and maintaining the temperature at that temperature for 1 hour;
(3) adding epoxy resin, saturated polyester resin, pigment and filler and an auxiliary agent into the stirred mixture according to the weight part of the formula;
(4) putting the uniformly stirred and mixed material into a double-screw extruder at 105 ℃, and heating, melting and mixing the material by the extruder to obtain a molten extrudate;
(5) extruding the melt obtained in the last step, cooling and tabletting the extruded melt by a stainless steel cooling roller pair, and slicing the extruded melt to obtain slices with the thickness of 2-4 mm;
(6) further cooling the large sheets by a steel belt and conveying the large sheets to a primary crushing area, and primarily crushing the large sheets by a wolf tooth stick pair roller to obtain sheets with the size of 1-3cm and the thickness of 2-4 mm;
(7) and (3) putting the primarily crushed slices into an ACM (Acetobacter asiaticum) pulverizer to be crushed, screening by a cyclone separator, and further screening by a rotary screen with a certain mesh number to obtain the heat dissipation powder coating.
Comparative example 1:
a heat dissipation powder coating comprises the following components in parts by weight:
200 parts of epoxy resin, 200 parts of saturated polyester, 200 parts of diamino diphenyl sulfone DDS HT-97610 parts, 10 parts of phthalimide, 150 parts of pigment and filler and 15 parts of auxiliary agent.
The preparation method of the heat dissipation powder coating comprises the following steps:
(1) diaminodiphenyl sulfone DDS HT-976 and phthalimide are added according to the weight part of 10: 5, adding the mixture into a high-speed mixing stirrer, and fully stirring and mixing for 10 min;
(2) heating the stirred mixture to 100 ℃ and maintaining the temperature at this temperature for 1 hour;
(3) adding epoxy resin, saturated polyester resin, pigment and filler and an auxiliary agent into the stirred mixture according to the weight part of the formula;
(4) putting the uniformly stirred and mixed materials into a 100 ℃ double-screw extruder, and heating, melting and mixing the materials by the extruder to obtain a molten extrudate;
(5) extruding the melt obtained in the last step, cooling and tabletting the extruded melt by a stainless steel cooling roller pair, and slicing the extruded melt to obtain slices with the thickness of 2-4 mm;
(6) further cooling the large sheets by a steel belt and conveying the large sheets to a primary crushing area, and primarily crushing the large sheets by a wolf tooth stick pair roller to obtain sheets with the size of 1-3cm and the thickness of 2-4 mm;
(7) and (3) putting the primarily crushed slices into an ACM (Acetobacter asiaticum) pulverizer to be crushed, screening by a cyclone separator, and further screening by a rotary screen with a certain mesh number to obtain the heat dissipation powder coating.
Comparative example 2:
a heat dissipation powder coating comprises the following components in parts by weight:
240 parts of epoxy resin, 240 parts of saturated polyester, 12 parts of phthalimide, 6 parts of polyethylene polyamine PEPA, 180 parts of pigment and filler and 18 parts of auxiliary agent.
The preparation method of the heat dissipation powder coating comprises the following steps:
(1) phthalimide and polyethylene polyamine PEPA are mixed according to the weight part of 12: 6, adding the mixture into a high-speed mixing stirrer, and fully stirring and mixing for 10 min;
(2) heating the stirred mixture to 140 ℃ and maintaining the temperature at that temperature for 1 hour;
(3) adding epoxy resin, saturated polyester resin, pigment and filler and an auxiliary agent into the stirred mixture according to the weight part of the formula;
(4) putting the uniformly stirred and mixed material into a 120 ℃ double-screw extruder, and heating, melting and mixing the material by the extruder to obtain a molten extrudate;
(5) extruding the melt obtained in the last step, cooling and tabletting the extruded melt by a stainless steel cooling roller pair, and slicing the extruded melt to obtain slices with the thickness of 2-4 mm;
(6) further cooling the large sheets by a steel belt and conveying the large sheets to a primary crushing area, and primarily crushing the large sheets by a wolf tooth stick pair roller to obtain sheets with the size of 1-3cm and the thickness of 2-4 mm;
(7) and (3) putting the primarily crushed slices into an ACM (Acetobacter asiaticum) pulverizer to be crushed, screening by a cyclone separator, and further screening by a rotary screen with a certain mesh number to obtain the heat dissipation powder coating. .
The practical application effect, the test detection method and the test detection result of the invention are as follows:
the heat dissipation powder coating meets the spraying requirement of the heat dissipation device industry, and mass production practice is carried out, and the result shows that the spraying effect is excellent, the appearance of a paint film is attractive, the heat resistance is excellent, and the acid resistance and the water resistance are realized.
The test detection method of the heat dissipation powder coating and the result are as follows:
water resistance: firstly, the powder coating is sprayed on a test sample plate with a tinplate as a substrate, more than 3 test sample plates are prepared, 2/3 with the length of the test sample plate is placed in distilled water, the distilled water is boiled, foreign matters on the surface of the test sample plate are washed away by water after a period of time, and observation and detection are carried out after surface moisture is absorbed by washing cotton, so that no adverse effect is caused.
Heat resistance: placing the test sample plate sprayed with the powder coating in an oven for 2 hours, setting the temperature of the oven to be 100 ℃, and keeping the surface of the test sample plate unchanged;
acid resistance: and (3) placing the test sample plate sprayed with the powder coating for 48-72 hours, then placing the test sample plate in dilute hydrochloric acid with the concentration of 30-36% for 1 hour, and observing that the surface of the test sample plate has no change.
As can be seen from the graph shown in fig. 1, the heat dissipating powder coating has stronger heat resistance, water resistance and acid resistance than conventional ones.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (4)
1. A heat dissipation powder coating and a preparation method thereof are characterized in that: the raw materials comprise the following components in parts by weight: 200-240 parts of epoxy resin, 200-240 parts of saturated polyester resin, 25-30 parts of curing agent, 150-180 parts of pigment and filler and 15-18 parts of auxiliary agent;
wherein the curing agent is a mixture of aromatic polyamine, polyamide and aliphatic amine;
the aromatic polyamine is selected from diaminodiphenyl sulfone DDS HT-976 or diaminodiphenyl methane DDM HT-972 DEH-50, the polyamide is selected from phthalimide, the aliphatic amine is selected from polyethylene polyamine PEPA or aminoethyl piperazine AE, wherein the aromatic polyamine: polyamide: the weight portion ratio of the aliphatic amines is 2: 2: 1.
2. the heat dissipation powder coating adopts the following synthesis steps of the curing agent:
(1) adding Diamino Diphenyl Sulfone (DDS) HT-976, phthalimide and polyethylene polyamine (PEPA) into a high-speed mixing stirrer according to the weight part ratio, and fully stirring and mixing for 10-15 min;
(2) heating the stirred mixture to 100-140 ℃ and preserving the heat for 1 hour at the temperature;
(3) after the stirred materials are mixed and cooled, adding epoxy resin, saturated polyester resin, pigment and filler and an auxiliary agent into the stirred mixture according to the weight part of the formula;
(4) putting the uniformly stirred and mixed materials into a double-screw extruder at the temperature of 100-120 ℃, and heating, melting and mixing the materials by the extruder to obtain a molten extrudate;
(5) extruding the melt obtained in the last step, cooling and tabletting the extruded melt by a stainless steel cooling roller pair, and slicing the extruded melt to obtain slices with the thickness of 2-4 mm;
(6) further cooling the large sheets by a steel belt and conveying the large sheets to a primary crushing area, and primarily crushing the large sheets by a wolf tooth stick pair roller to obtain sheets with the size of 1-3cm and the thickness of 2-4 mm;
(7) and (3) putting the primarily crushed slices into an ACM (Acetobacter asiaticum) pulverizer to be crushed, screening by a cyclone separator, and further screening by a rotary screen with a certain mesh number to obtain the heat dissipation powder coating.
3. The heat-dissipating powder coating and the method for preparing the same according to claim 1, wherein: the auxiliary agent comprises one or more of polyacrylate, silicon-containing acrylate and polyvinyl butyral.
4. The heat-dissipating powder coating and the method for preparing the same according to claim 1, wherein: the particle diameter of the heat dissipation powder coating in the step (7) is about 45 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010811368.1A CN112063264A (en) | 2020-08-13 | 2020-08-13 | Heat dissipation powder coating and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010811368.1A CN112063264A (en) | 2020-08-13 | 2020-08-13 | Heat dissipation powder coating and preparation method thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1740207A (en) * | 2005-09-14 | 2006-03-01 | 中国科学院广州化学研究所 | A kind of epoxy resin roughening and curing agent |
| CN103342949A (en) * | 2013-07-15 | 2013-10-09 | 天津翔盛粉末涂料有限公司 | Special powder coating for radiator |
| CN108753101A (en) * | 2018-05-07 | 2018-11-06 | 张建洲 | A kind of epoxide powder coating and its application |
| CN108864902A (en) * | 2018-07-21 | 2018-11-23 | 佛山市禅城区热拉空间生物科技有限公司 | A kind of high-strength fire-retarding powdery paints and preparation method thereof |
| CN108929624A (en) * | 2018-06-28 | 2018-12-04 | 江苏华光新材料科技有限公司 | Heat conduction and heat radiation powdery paints and preparation method thereof |
| CN111040589A (en) * | 2019-12-27 | 2020-04-21 | 上海邦中新材料有限公司 | Special anticorrosive powder coating for pipeline and preparation method and application thereof |
-
2020
- 2020-08-13 CN CN202010811368.1A patent/CN112063264A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1740207A (en) * | 2005-09-14 | 2006-03-01 | 中国科学院广州化学研究所 | A kind of epoxy resin roughening and curing agent |
| CN103342949A (en) * | 2013-07-15 | 2013-10-09 | 天津翔盛粉末涂料有限公司 | Special powder coating for radiator |
| CN108753101A (en) * | 2018-05-07 | 2018-11-06 | 张建洲 | A kind of epoxide powder coating and its application |
| CN108929624A (en) * | 2018-06-28 | 2018-12-04 | 江苏华光新材料科技有限公司 | Heat conduction and heat radiation powdery paints and preparation method thereof |
| CN108864902A (en) * | 2018-07-21 | 2018-11-23 | 佛山市禅城区热拉空间生物科技有限公司 | A kind of high-strength fire-retarding powdery paints and preparation method thereof |
| CN111040589A (en) * | 2019-12-27 | 2020-04-21 | 上海邦中新材料有限公司 | Special anticorrosive powder coating for pipeline and preparation method and application thereof |
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