CN105258004B - A kind of LED daylight lamp of good heat dissipation effect - Google Patents

Abstract

The invention discloses an LED fluorescent lamp with good heat dissipation effect, which comprises an aluminum base heat dissipation base, an installation position is arranged on the aluminum base heat dissipation base; The through hole of the entire aluminum-based heat dissipation base is provided with a heat dissipation coating on the inner wall of the through hole, an LED assembly is provided on the installation position, and a lampshade is arranged on the aluminum-based heat dissipation base. The lampshade is made of impact-resistant Made of polycarbonate material. The object of the present invention is to overcome the disadvantages of the prior art, and provide an LED fluorescent lamp with reasonable ratio, good heat dissipation effect, long service life and strong impact resistance of the lampshade.

Description

A LED fluorescent lamp with good cooling effect

technical field

The invention relates to an LED fluorescent lamp with good heat dissipation effect.

Background technique

In the existing LED fluorescent lamps, the heat generated by the illuminant cannot realize forced convection heat dissipation in a narrow space, so the heat dissipation effect of the existing LED fluorescent lamps is relatively poor, which seriously affects the service life of the LED fluorescent lamps. The lampshades of the existing LED fluorescent lamps are generally It is made of materials such as glass or acrylic, which has relatively poor impact resistance and is easily damaged during transportation or use.

Contents of the invention

The object of the present invention is to overcome the disadvantages of the prior art, and provide an LED fluorescent lamp with reasonable ratio, good heat dissipation effect, long service life and strong impact resistance of the lampshade.

In order to achieve the above object, the present invention adopts the following scheme:

An LED fluorescent lamp with good heat dissipation effect, comprising an aluminum base heat dissipation base, an installation position is arranged on the aluminum base heat dissipation base, and a heat dissipation device is provided between the installation position and the aluminum base heat dissipation base along the length direction and runs through the entire aluminum base heat dissipation base. The through hole of the base is provided with a heat dissipation coating on the inner wall of the through hole, the LED assembly is arranged on the installation position, and the lampshade is arranged on the aluminum base heat dissipation base, and the lampshade is made of impact-resistant polycarbonate material, the impact-resistant polycarbonate material is prepared by the following method:

Step A, preparation of prefabricated body: by weight, take 20-30 parts of fatty acid calcium, heat to 150-170°C, then add 20-30 parts of silicon oxide powder, 0.5-1 part of glass fiber, stir evenly, and cool Finally, the modified powder is obtained; then the modified powder is mixed with 10-20 parts of polyethylene in a mixer, and then 5-10 parts of ethylene bisstearamide and 5-10 parts of chlorinated polyethylene are added. After heating up, mix evenly, and cool to room temperature to obtain a preform;

Step B, the preform in step A and 40-60 parts of polycarbonate, 3-5 parts of butanediol diacrylate, 0.5-1 part of antioxidant, 0.5-1 part of silane coupling agent, 0.5 parts of lubricant -1 part, mix well to get a mixture;

Step C, sending the mixture into a twin-screw extruder for extrusion and granulation.

An LED lamp with good heat dissipation effect as described above is characterized in that the heat dissipation coating includes the following components by weight:

A LED lamp with good heat dissipation effect as described above is characterized in that the polycarbonate-type water-based polyurethane is prepared by the following method:

Add 1000 parts by weight of polycarbonate diol into a container with a stirrer, raise the temperature to 100-120°C, distill under reduced pressure for 0.5-1 hour, cool down to 75-85°C, add 300 parts by weight of 2,4-toluene diol Isocyanate, vacuum dehydration for 0.5-1 hour, blow nitrogen, add 450 parts by weight of isophorone diisocyanate, react at 70-90°C for 2-3 hours, add 80-120 parts by weight of acetone, cool down to 25-40°C , add 90-100 parts by weight of triethylamine for neutralization reaction for 10-20 minutes, add 30-50 parts by weight of N-methylpyrrolidone, react at 60-65°C for 0.5 hours, add 100 parts by weight of butanone and 156 parts by weight 1,4-butanediol, react for 1-2 hours, add 800-900 parts by weight of deionized water and 70-80 parts by weight of trifluoroacetic acid, stir and disperse evenly.

The LED lamp with good heat dissipation effect as described above is characterized in that it also includes 0.5-1 weight part of aluminum oxide, 0.1-1 weight part of zirconia, and the curing agent is isocyanate.

The above-mentioned LED lamp with good heat dissipation effect is characterized in that a plurality of heat dissipation fins are arranged on the outer wall of the aluminum base heat dissipation base.

The above-mentioned LED lamp with good heat dissipation is characterized in that the LED assembly includes a PCB board, and LED chips are arranged on the PCB board.

In summary, the present invention has the beneficial effects relative to the prior art as follows:

The heat dissipation coating in the present invention has good heat dissipation effect, which can greatly improve the heat exchange efficiency of the heat emitted by the LED components in a narrow space and improve the operating environment. Effectively prolong the service life of LED fluorescent lamps.

In the invention, the carbon nanotube has stable chemical properties, strong stability and corrosion resistance, can protect the object to be coated, and increase its service life.

The polycarbonate waterborne polyurethane latex film of the present invention has excellent tensile strength and elongation at break, and has excellent hydrolysis stability.

The LED fluorescent lamp of the invention has the advantages of simple structure, convenient installation, good heat dissipation effect and long service life.

Description of drawings

Fig. 1 is a schematic cross-sectional view of the present invention.

Detailed ways

The present invention will be further described below in conjunction with specific embodiment:

As shown in Figure 1, a LED fluorescent lamp with good heat dissipation effect includes an aluminum base heat dissipation base, an installation position 2 is arranged on the aluminum base heat dissipation base, and a The through-hole 3 that runs through the entire aluminum-based heat dissipation base along the length direction is provided with a heat-dissipation coating 4 on the inner wall of the through-hole 3, an LED assembly 5 is provided on the installation position 2, and a heat dissipation coating 4 is provided on the aluminum-based heat dissipation base. There is a lampshade 6, and the lampshade 6 is made of impact-resistant polycarbonate material, and the impact-resistant polycarbonate material is prepared by the following method:

Step A, preparation of prefabricated body: by weight, take 20-30 parts of fatty acid calcium, heat to 150-170°C, then add 20-30 parts of silicon oxide powder, 0.5-1 part of glass fiber, stir evenly, and cool Finally, the modified powder is obtained; then the modified powder is mixed with 10-20 parts of polyethylene in a mixer, and then 5-10 parts of ethylene bisstearamide and 5-10 parts of chlorinated polyethylene are added. After heating up, mix evenly, and cool to room temperature to obtain a preform;

Step B, the preform in step A and 40-60 parts of polycarbonate, 3-5 parts of butanediol diacrylate, 0.5-1 part of antioxidant, 0.5-1 part of silane coupling agent, 0.5 parts of lubricant -1 part, mix well to get a mixture;

Step C, sending the mixture into a twin-screw extruder for extrusion and granulation.

The heat dissipation coating 4 of the present invention comprises the following components by weight:

Polycarbonate water-based polyurethane of the present invention is prepared by the following method:

Add 1000 parts by weight of polycarbonate diol into a container with a stirrer, raise the temperature to 100-120°C, distill under reduced pressure for 0.5-1 hour, cool down to 75-85°C, add 300 parts by weight of 2,4-toluene diol Isocyanate, vacuum dehydration for 0.5-1 hour, blow nitrogen, add 450 parts by weight of isophorone diisocyanate, react at 70-90°C for 2-3 hours, add 80-120 parts by weight of acetone, cool down to 25-40°C , add 90-100 parts by weight of triethylamine for neutralization reaction for 10-20 minutes, add 30-50 parts by weight of N-methylpyrrolidone, react at 60-65°C for 0.5 hours, add 100 parts by weight of butanone and 156 parts by weight 1,4-butanediol, react for 1-2 hours, add 800-900 parts by weight of deionized water and 70-80 parts by weight of trifluoroacetic acid, stir and disperse evenly.

The present invention also includes 0.5-1 weight part of aluminum oxide, 0.1-1 weight part of zirconium oxide, and the curing agent is isocyanate.

In the present invention, several cooling fins are arranged on the outer wall of the aluminum base cooling base.

The LED assembly 5 of the present invention includes a PCB board on which LED chips are arranged.

Example 1

The preparation method of impact-resistant polycarbonate of the present invention, comprises the steps:

Step 1. Preparation of the prefabricated body: Take 20Kg of fatty acid calcium, heat it to 150°C, then add 20Kg of silicon oxide powder and 0.5Kg of glass fiber, stir evenly, and obtain a modified powder after cooling; then add the modified powder Initially mixed with 10Kg of polyethylene in a mixer, then added 5Kg of ethylene bisstearamide and 5Kg of chlorinated polyethylene, mixed evenly after heating up, cooled to room temperature, and obtained a prefabricated body, the length of the glass fiber is 10 ~ 500 microns;

Step 2, mix the prefabricated body, polycarbonate 40Kg, butanediol diacrylate 3Kg, antioxidant 0.5Kg, silane coupling agent KH-570 0.5Kg, and lubricant 0.5Kg evenly to obtain the mixture; The antioxidant is Antioxidant 1010;

The third step is to send the mixture into the twin-screw extruder for extrusion and granulation. The extrusion temperature of the twin-screw extruder is 190°C in the first zone, 200°C in the second zone, 220°C in the third zone, and 220°C in the fourth zone. The temperature is 210°C, the temperature in the fifth zone is 230°C, and the screw speed is 180rpm.

Example 2

The preparation method of impact-resistant polycarbonate of the present invention, comprises the steps:

Step 1, preparation of the prefabricated body: Take 30Kg of fatty acid calcium, heat it to 170°C, then add 30Kg of silicon oxide powder and 1Kg of glass fiber, stir evenly, and obtain a modified powder after cooling; then mix the modified powder with 20Kg of polyethylene is initially mixed in a mixer, then 10Kg of ethylene bisstearamide and 10Kg of chlorinated polyethylene are added, after heating up, mix evenly, and cool to room temperature to obtain a preform. The length of the glass fiber is 10-500 Micron;

Step 2, mix the preform, polycarbonate 60Kg, butanediol diacrylate 5Kg, antioxidant 1Kg, silane coupling agent KH-570 1Kg, and lubricant 1Kg to obtain a mixture; The agent is antioxidant 1010;

The third step is to send the mixture into the twin-screw extruder for extrusion and granulation. The extrusion temperature of the twin-screw extruder is 190°C in the first zone, 200°C in the second zone, 220°C in the third zone, and 220°C in the fourth zone. The temperature is 210°C, the temperature in the fifth zone is 230°C, and the screw speed is 180rpm.

Example 3

The preparation method of impact-resistant polycarbonate of the present invention, comprises the steps:

Step 1. Preparation of prefabricated body: Take 25Kg of fatty acid calcium, heat it to 160°C, then add 25Kg of silicon oxide powder and 0.8Kg of glass fiber, stir evenly, and obtain a modified powder after cooling; then add the modified powder Initially mixed with 15Kg of polyethylene in a mixer, then added 8Kg of ethylene bisstearamide and 7Kg of chlorinated polyethylene, mixed evenly after heating up, cooled to room temperature, and obtained a prefabricated body, the length of the glass fiber is 10 ~ 500 microns;

Step 2, mix the prefabricated body, polycarbonate 50Kg, butanediol diacrylate 4Kg, antioxidant 0.6Kg, silane coupling agent KH-570 0.8Kg, and lubricant 0.6Kg evenly to obtain the mixture; The antioxidant is Antioxidant 1010;

The third step is to send the mixture into the twin-screw extruder for extrusion and granulation. The extrusion temperature of the twin-screw extruder is 195°C in the first zone, 205°C in the second zone, 225°C in the third zone, and 225°C in the fourth zone. The temperature is 220°C, the temperature in the fifth zone is 235°C, and the screw speed is 200rpm.

Comparative example 1

The difference from Example 3 is that the preparation of the preform is not carried out, and the glass fiber is added in the second step.

The 1st step, with polycarbonate 50Kg, butanediol diacrylate 4Kg, antioxidant 0.6Kg, silane coupling agent KH-5700.8Kg, lubricant 0.6Kg, glass fiber 15Kg, mix uniformly, obtain mixture; The antioxidant is antioxidant 1010, and the length of the glass fiber is 10-500 microns;

The second step is to send the mixture into the twin-screw extruder for extrusion and granulation. The extrusion temperature of the twin-screw extruder is 195°C in the first zone, 205°C in the second zone, 225°C in the third zone, and 225°C in the fourth zone. The temperature is 220°C, the temperature in the fifth zone is 235°C, and the screw speed is 200rpm.

Comparative example 2

The difference from Example 3 is that the glass fiber is added in the second step.

The first step, the preparation of the prefabricated body: Take 25Kg of fatty acid calcium, heat it to 160°C, then add 25Kg of silicon oxide powder, stir evenly, after cooling, obtain the modified powder; then mix the modified powder with 15Kg of polyethylene Initially mix in the mixer, then add 8Kg of ethylene bisstearamide and 7Kg of chlorinated polyethylene, mix evenly after heating up, cool to room temperature, and obtain a preform;

Step 2, mix the preform, polycarbonate 50Kg, butanediol diacrylate 4Kg, antioxidant 0.6Kg, silane coupling agent KH-570 0.8Kg, lubricant 0.6Kg, and glass fiber 0.8Kg evenly, The mixture is obtained; the antioxidant is antioxidant 1010, and the length of the glass fiber is 10 to 500 microns;

The third step is to send the mixture into the twin-screw extruder for extrusion and granulation. The extrusion temperature of the twin-screw extruder is 195°C in the first zone, 205°C in the second zone, 225°C in the third zone, and 225°C in the fourth zone. The temperature is 220°C, the temperature in the fifth zone is 235°C, and the screw speed is 200rpm.

Comparative example 3

The difference with embodiment 3 is: no chlorinated polyethylene is added in the 1st step.

The preparation method of impact-resistant polycarbonate comprises the steps:

Step 1. Preparation of prefabricated body: Take 25Kg of fatty acid calcium, heat it to 160°C, then add 25Kg of silicon oxide powder and 0.8Kg of glass fiber, stir evenly, and obtain a modified powder after cooling; then add the modified powder Initially mix with 15Kg of polyethylene in a mixer, then add 8Kg of ethylene bisstearamide, mix evenly after heating up, cool to room temperature, and obtain a preform, and the length of the glass fiber is 10 to 500 microns;

Step 2, mix the prefabricated body, polycarbonate 50Kg, butanediol diacrylate 4Kg, antioxidant 0.6Kg, silane coupling agent KH-570 0.8Kg, and lubricant 0.6Kg evenly to obtain the mixture; The antioxidant is Antioxidant 1010;

The third step is to send the mixture into the twin-screw extruder for extrusion and granulation. The extrusion temperature of the twin-screw extruder is 195°C in the first zone, 205°C in the second zone, 225°C in the third zone, and 225°C in the fourth zone. The temperature is 220°C, the temperature in the fifth zone is 235°C, and the screw speed is 200rpm.

Performance test table 1

It can be seen from Table 1 that the polycarbonate provided by the present invention has good mechanical strength. As can be seen by comparing the examples with the comparative example 1, the tensile strength can be significantly improved by introducing the preform; as can be seen from the examples and the comparative example 2, the fiberglass can be better improved by being prepared in the preform. Notched impact strength of esters. It can be seen from Examples and Comparative Example 3 that the heat distortion temperature can be increased by introducing chlorinated polyethylene into the preform.

Example 4

The heat dissipation coating of the present invention comprises the following components by weight:

Wherein said polycarbonate type waterborne polyurethane is prepared by the following method:

Add 1000 parts by weight of polycarbonate diol into a container with a stirrer, raise the temperature to 100°C, distill under reduced pressure for 0.5 hours, cool down to 75°C, add 300 parts by weight of 2,4-toluene diisocyanate, and vacuum dehydrate for 0.5 hours , blow nitrogen, add 450 parts by weight of isophorone diisocyanate, react at 70°C for 2-3 hours, add 80 parts by weight of acetone, cool down to 25°C, add 90 parts by weight of triethylamine for neutralization reaction for 10 minutes , add 30 parts by weight of N-methylpyrrolidone, react at 60-65°C for 0.5 hours, add 100 parts by weight of butanone and 156 parts by weight of 1,4-butanediol, react for 1-2 hours, add 800 parts by weight to Ionized water and 70 parts by weight of trifluoroacetic acid are stirred and dispersed evenly.

The preparation method of described waterborne carbon nanotube heat-dissipating coating, comprises the following steps:

A. Add carbon nanotubes to the mixed acid of concentrated H ₂ SO ₄ and concentrated HNO ₃ with a volume ratio of 3:1, acidify at 60°C for 1 hour, wash to neutral after reaction and dry in vacuum;

B. Add the carbon nanotubes and dispersant TNWDIS in step A into acrylic acid for ultrasonic dispersion for 20 minutes to form dispersion system I;

C. Heat polycarbonate-type water-based polyurethane, epoxy resin-modified acrylic resin, polycarbonate, and silicon carbide to 60°C and stir at 900r/min for 0.5 hours to obtain dispersion system II;

D. Mix and stir the dispersion system I in step B and the dispersion system II in step C evenly, then grind to 30 μm, and then add curing agent and ultrasonically disperse evenly.

Example 5

The heat dissipation coating of the present invention comprises the following components by weight:

Wherein said polycarbonate type waterborne polyurethane is prepared by the following method:

Add 1000 parts by weight of polycarbonate diol into a container with a stirrer, raise the temperature to 120°C, distill under reduced pressure for 0.5-1 hour, cool down to 85°C, add 300 parts by weight of 2,4-toluene diisocyanate, and vacuum dehydrate For 1 hour, blow nitrogen, add 450 parts by weight of isophorone diisocyanate, react at 90°C for 3 hours, add 120 parts by weight of acetone, cool down to 40°C, add 100 parts by weight of triethylamine for neutralization reaction for 20 minutes , add 50 parts by weight of N-methylpyrrolidone, react at 60-65°C for 0.5 hours, add 100 parts by weight of butanone and 156 parts by weight of 1,4-butanediol, react for 1-2 hours, add 900 parts by weight to Ionized water and 80 parts by weight of trifluoroacetic acid are stirred and dispersed evenly.

The preparation method of described waterborne carbon nanotube heat-dissipating coating, comprises the following steps:

A. Add carbon nanotubes to the mixed acid of concentrated H ₂ SO ₄ and concentrated HNO ₃ with a volume ratio of 3:1, acidify at 60°C for 4 hours, wash to neutral after reaction and dry in vacuum;

B. Add the carbon nanotubes and dispersant TNWDIS in step A into acrylic acid for ultrasonic dispersion for 60 minutes to form dispersion system I;

C. Heat polycarbonate-type water-based polyurethane, epoxy resin modified acrylic resin, polycarbonate, and silicon carbide to 75°C, and stir at 900-1200r/min for 2 hours to obtain dispersion system II;

D. Mix and stir the dispersion system I in step B and the dispersion system II in step C evenly, then grind to 50 μm, and then add curing agent and ultrasonically disperse evenly.

Example 6

The heat dissipation coating of the present invention comprises the following components by weight:

Wherein said polycarbonate type waterborne polyurethane is prepared by the following method:

Add 1000 parts by weight of polycarbonate diol into a container with a stirrer, raise the temperature to 120°C, distill under reduced pressure for 0.6 hours, cool down to 75-85°C, add 300 parts by weight of 2,4-toluene diisocyanate, and vacuum dehydrate 0.5-1 hour, blow nitrogen, add 450 parts by weight of isophorone diisocyanate, react at 80°C for 2.5 hours, add 100 parts by weight of acetone, cool down to 30°C, add 95 parts by weight of triethylamine to neutralize the reaction 15 minutes, add 40 parts by weight of N-methylpyrrolidone, react at 62°C for 0.5 hours, add 100 parts by weight of butanone and 156 parts by weight of 1,4-butanediol, react for 1.5 hours, add 850 parts by weight of deionized water and 75 parts by weight of trifluoroacetic acid, stir and disperse evenly.

The preparation method of described waterborne carbon nanotube heat-dissipating coating, comprises the following steps:

A. Add carbon nanotubes to the mixed acid of concentrated H ₂ SO ₄ and concentrated HNO ₃ with a volume ratio of 3:1, acidify at 60°C for 2 hours, wash to neutral after reaction and dry in vacuum;

B. Add the carbon nanotubes and dispersant TNWDIS in step A into acrylic acid for ultrasonic dispersion for 40 minutes to form dispersion system I;

C. Heat polycarbonate-type water-based polyurethane, epoxy resin modified acrylic resin, polycarbonate, and silicon carbide to 70°C and stir at 1200r/min for 1 hour to obtain dispersion system II;

D. Mix and stir the dispersion system I in step B and the dispersion system II in step C evenly, then grind to 40 μm, and then add curing agent and ultrasonically disperse evenly.

Example 7

The heat dissipation coating of the present invention comprises the following components by weight:

Wherein said polycarbonate type waterborne polyurethane is prepared by the following method:

Add 1000 parts by weight of polycarbonate diol into a container with a stirrer, raise the temperature to 100°C, distill under reduced pressure for 0.5 hours, cool down to 80°C, add 300 parts by weight of 2,4-toluene diisocyanate, and vacuum dehydrate for 0.5 hours , feed nitrogen, add 450 parts by weight of isophorone diisocyanate, react at 80°C for 2 hours, add 100 parts by weight of acetone, cool down to 40°C, add 95 parts by weight of triethylamine for neutralization reaction for 20 minutes, add 50 parts by weight of N-methylpyrrolidone, reacted at 60°C for 0.5 hours, added 100 parts by weight of butanone and 156 parts by weight of 1,4-butanediol, reacted for 1-2 hours, added 900 parts by weight of deionized water and 70 parts by weight of trifluoroacetic acid, stirred and dispersed evenly.

The preparation method of described waterborne carbon nanotube heat-dissipating coating, comprises the following steps:

A. Add carbon nanotubes to the mixed acid of concentrated H ₂ SO ₄ and concentrated HNO ₃ with a volume ratio of 3:1, acidify at 60°C for 1-4 hours, wash to neutral after reaction and dry in vacuum;

B. Add the carbon nanotubes and dispersant TNWDIS in step A into acrylic acid for ultrasonic dispersion for 60 minutes to form dispersion system I;

C. Heat polycarbonate-type water-based polyurethane, epoxy resin modified acrylic resin, polycarbonate, and silicon carbide to 60°C and stir at 1200r/min for 1 hour to obtain dispersion system II;

D. Mix and stir the dispersion system I in step B and the dispersion system II in step C evenly, then grind to 30-50 μm, then add curing agent and ultrasonically disperse evenly.

Example 8

The heat dissipation coating of the present invention comprises the following components by weight:

Wherein said polycarbonate type waterborne polyurethane is prepared by the following method:

Add 1000 parts by weight of polycarbonate diol into a container with a stirrer, raise the temperature to 120°C, distill under reduced pressure for 1 hour, cool down to 85°C, add 300 parts by weight of 2,4-toluene diisocyanate, and vacuum dehydrate for 0.5 hours , blow nitrogen, add 450 parts by weight of isophorone diisocyanate, react at 70°C for 2-3 hours, add 120 parts by weight of acetone, cool down to 25°C, add 100 parts by weight of triethylamine for neutralization reaction for 20 minutes , add 30 parts by weight of N-methylpyrrolidone, react at 65°C for 0.5 hours, add 100 parts by weight of butanone and 156 parts by weight of 1,4-butanediol, react for 1 hour, add 900 parts by weight of deionized water and 70 parts by weight of trifluoroacetic acid, stirred and dispersed evenly.

The preparation method of described waterborne carbon nanotube heat-dissipating coating, comprises the following steps:

A. Add carbon nanotubes to the mixed acid of concentrated H ₂ SO ₄ and concentrated HNO ₃ with a volume ratio of 3:1, acidify at 60°C for 2 hours, wash to neutral after reaction and dry in vacuum;

B. Add the carbon nanotubes and dispersant TNWDIS in step A to acrylic acid for ultrasonic dispersion for 30 minutes to form dispersion system I;

C. Heat polycarbonate-type water-based polyurethane, epoxy resin modified acrylic resin, polycarbonate, and silicon carbide to 65°C, and stir at 900-1200r/min for 1 hour to obtain dispersion system II;

D. Mix and stir the dispersion system I in step B and the dispersion system II in step C evenly, then grind to 30 μm, and then add curing agent and ultrasonically disperse evenly.

Example 9

The heat dissipation coating of the present invention comprises the following components by weight:

Wherein said polycarbonate type waterborne polyurethane is prepared by the following method:

Add 1000 parts by weight of polycarbonate diol into a container with a stirrer, raise the temperature to 120°C, distill under reduced pressure for 0.6 hours, cool down to 75-85°C, add 300 parts by weight of 2,4-toluene diisocyanate, and vacuum dehydrate 0.5-1 hour, blow nitrogen, add 450 parts by weight of isophorone diisocyanate, react at 80°C for 2.5 hours, add 100 parts by weight of acetone, cool down to 30°C, add 95 parts by weight of triethylamine to neutralize the reaction 15 minutes, add 40 parts by weight of N-methylpyrrolidone, react at 62°C for 0.5 hours, add 100 parts by weight of butanone and 156 parts by weight of 1,4-butanediol, react for 1.5 hours, add 850 parts by weight of deionized water and 75 parts by weight of trifluoroacetic acid, stir and disperse evenly.

The preparation method of described waterborne carbon nanotube heat-dissipating coating, comprises the following steps:

A. Add carbon nanotubes to the mixed acid of concentrated H ₂ SO ₄ and concentrated HNO ₃ with a volume ratio of 3:1, acidify at 60°C for 2 hours, wash to neutral after reaction and dry in vacuum;

B. Add the carbon nanotubes and dispersant TNWDIS in step A into acrylic acid for ultrasonic dispersion for 40 minutes to form dispersion system I;

C. Heat polycarbonate-type water-based polyurethane, epoxy resin modified acrylic resin, polycarbonate, and silicon carbide to 70°C and stir at 1200r/min for 1 hour to obtain dispersion system II;

D. Mix and stir the dispersion system I in step B and the dispersion system II in step C evenly, then grind to 40 μm, and then add curing agent and ultrasonically disperse evenly.

Example 10

The heat dissipation coating of the present invention comprises the following components by weight:

Add 1000 parts by weight of polycarbonate diol into a container with a stirrer, raise the temperature to 120°C, distill under reduced pressure for 0.5-1 hour, cool down to 85°C, add 300 parts by weight of 2,4-toluene diisocyanate, and vacuum dehydrate For 1 hour, blow nitrogen, add 450 parts by weight of isophorone diisocyanate, react at 90°C for 3 hours, add 120 parts by weight of acetone, cool down to 40°C, add 100 parts by weight of triethylamine for neutralization reaction for 20 minutes , add 50 parts by weight of N-methylpyrrolidone, react at 60-65°C for 0.5 hours, add 100 parts by weight of butanone and 156 parts by weight of 1,4-butanediol, react for 1-2 hours, add 900 parts by weight to Ionized water and 80 parts by weight of trifluoroacetic acid are stirred and dispersed evenly.

The preparation method of described waterborne carbon nanotube heat-dissipating coating, comprises the following steps:

A. Add carbon nanotubes to the mixed acid of concentrated H ₂ SO ₄ and concentrated HNO ₃ with a volume ratio of 3:1, acidify at 60°C for 4 hours, wash to neutral after reaction and dry in vacuum;

B. Add the carbon nanotubes and dispersant TNWDIS in step A into acrylic acid for ultrasonic dispersion for 60 minutes to form dispersion system I;

C. Heat polycarbonate-type water-based polyurethane, epoxy resin modified acrylic resin, polycarbonate, and silicon carbide to 75°C, and stir at 900-1200r/min for 2 hours to obtain dispersion system II;

D. Mix and stir the dispersion system I in step B and the dispersion system II in step C evenly, then grind to 50 μm, and then add curing agent and ultrasonically disperse evenly.

Further verify the heat dissipation performance of heat dissipation coating of the present invention by following test:

Take 8 aluminum substrates and mark them respectively, plate 1, plate 2, plate 3, plate 4, plate 5, plate 6, plate 7, and plate 8; among them, plate 1 is not coated with heat-dissipating paint, and the surfaces of plates 2-8 are respectively coated with the present invention Test the performance of the heat-dissipating coating in Examples 4-10 after curing; place plates 1 to 8 on the heating plate, and adjust the temperature to 50°C, 80°C, 100°C, 150°C, 200°C, and 250°C in sequence , 300°C. After each temperature adjustment, equilibrate for 60 minutes and continue heating to the next temperature. Use a thermometer to record the temperature. The results are shown in Table 2. The room temperature is 25°C.

Table 2

It can be clearly shown from Table 2 that the temperature of the aluminum substrate coated with the heat dissipation coating of the present invention is much lower than that of the aluminum substrate without the heat dissipation coating, indicating that the heat dissipation coating of the present invention has a good heat dissipation effect.

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments. What are described in the above-mentioned embodiments and the description only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have Variations and improvements are possible, which fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (4)

1. a kind of LED daylight lamp of good heat dissipation effect, includes aluminium base heat dissipation base, peace is equipped on the aluminium base heat dissipation base It fills position (2), is equipped between the installation position (2) and aluminium base heat dissipation base along its length through the logical of entire aluminium base heat dissipation base Hole (3) is equipped with thermal dispersant coatings (4) in the through-hole (3) inner wall, LED component (5) is equipped on the installation position (2), described Aluminium base heat dissipation base is equipped with lampshade (6), and the lampshade (6) is made of impact-resistant makrolon material, the impact resistance Makrolon material be prepared by the following method：

Step A, the preparation of precast body：By weight, 20-30 parts of fatty acid calcium is taken, 150-170 DEG C is heated to, then adds in 20-30 parts of silica powder, 0.5-1 parts of glass fibre, stir evenly, after cooling, obtain modified powder；Again by modified powder with 10-20 parts of polyethylene is just mixed in mixing machine, adds 5-10 parts of ethylene bis stearamide, 5-10 parts of haloflex, heats up After be uniformly mixed, be cooled to room temperature, obtain precast body；

Step B, by the precast body in step A and 40-60 parts of makrolon, 3-5 parts of butanediol double methacrylate, antioxidant 0.5- 1 part, 0.5-1 parts of silane coupling agent, 0.5-1 parts of lubricant, be uniformly mixed, obtain mixture；

Step C, mixture is sent into extruding pelletization in double screw extruder, you can；

The thermal dispersant coatings (4) include following components by weight：

The polycarbonate waterborne polyurethane is prepared by the following method：

The polycarbonate glycol of 1000 parts by weight is added in the container of belt stirrer, be warming up to 100-120 DEG C, vacuum distillation 0.5-1 hours, 75-85 DEG C is cooled to, adds in 300 parts by weight 2,4- toluene di-isocyanate(TDI)s, vacuum dehydration 0.5-1 hours is led to Enter nitrogen, add in 450 parts by weight isophorone diisocyanate, reacted 2-3 hours at 70-90 DEG C, add in 80-120 parts by weight Acetone, be cooled to 25-40 DEG C, add in the triethylamine neutralization reaction of 90-100 parts by weight 10-20 minute, addition 30-50 weight Part N-Methyl pyrrolidone, reacts 0.5 hour at 60-65 DEG C, adds in 100 parts by weight butanone and 156 parts by weight Isosorbide-5-Nitrae-fourth two Alcohol reacts 1-2 hours, adds in 800-900 parts by weight of deionized water and 70-80 parts by weight trifluoroacetic acids, is dispersed with stirring uniformly, i.e., It can.

2. the LED daylight lamp of a kind of good heat dissipation effect according to claim 1, it is characterised in that further included 0.5-1 weights The alundum (Al2O3) of part, the zirconium oxide of 0.1-1 parts by weight are measured, the curing agent is isocyanates.

3. the LED daylight lamp of a kind of good heat dissipation effect according to claim 1, it is characterised in that at aluminium base heat dissipation bottom Seat outer wall is equipped with several cooling fins.

A kind of 4. LED daylight lamp of good heat dissipation effect according to claim 1, it is characterised in that the LED component (5) Include pcb board, LED chip is equipped on the pcb board.