KR101220209B1 - High heat radiation and light-weight plastic resin composition for led lamp parts and manufacturing method of the same and product using the same - Google Patents

Abstract

PURPOSE: A manufacturing method of a synthetic resin composition is provided to have an extremely high dispersing effect of expanded carbons, to improve heat-radiating performance of a final product and to provide a synthetic resin composition with light weight. CONSTITUTION: A manufacturing method of a synthetic resin composition comprises: a step(S1) of mixing and stirring polyol, expandable graphite, and water to manufacture a polyol/expandable graphite mixture solution; a step(S2) of manufacturing a polyurethane/expandable graphite master batch by in-situ reacting the mixture solution and isocyanate; a step(S3) of manufacturing a polyurethane/expandable graphite to crushing the master batch; and a step(S4) of molding an engineering synthetic resin, an expandable graphite, the master batch powder, an antioxidant and a coupling agent in an extruder by a master batch pellet. [Reference numerals] (S1) Step of manufacturing a polyol/expandable graphite mixture solution; (S2) Step of manufacturing a polyurethane/expandable graphite master batch; (S3) Step of manufacturing polyurethane/expandable graphite master batch powder; (S4) Step of molding master batch pellets

Description

HIGH HEAT RADIATION AND LIGHT-WEIGHT PLASTIC RESIN COMPOSITION FOR LED LAMP PARTS AND MANUFACTURING METHOD OF THE SAME AND PRODUCT USING THE SAME}

The present invention is to prepare a master batch of polyurethane / expanded graphite composite through In Situ reaction and then pulverize it to powder, and then to produce a compound pellet by mixing a synthetic resin, expanded graphite therein, this pellet High heat dissipation for LED lighting parts by manufacturing products such as LED (Light Emitting Diode) lighting sockets by injection molding, so that the dispersing effect of expanded graphite is very large and the heat dissipation characteristics of articles such as sockets can be improved. And a lightweight synthetic resin composition, a method for producing the same, and an article manufactured using the composition.

In recent years, as electronic devices become smaller and higher in performance, there are many problems such as deterioration and failure of members due to retention of heat generated inside the device, and to solve this problem, a heat dissipation member for dissipating heat to the outside is required. .

In particular, LED lighting has a significant effect on quality due to shortening of lifespan and deterioration of luminous efficiency due to heat generation. Generally, when junction temperature is lowered by 10 degrees, relative efficiency is improved by 20% and junction temperature is high. It is known that the lifespan of ground LED lighting is reduced exponentially.

In other words. The key advantage of high efficiency and long life, which is the unique advantage of LED lighting, is LED heat dissipation technology. Therefore, it is urgent to develop core technologies for the development of high efficiency heat dissipation modules.

On the other hand, generally, the material of the socket used for LED lighting is mostly applied by aluminum die casting (manufactured by melting aluminum powder into an injection molding machine and injecting it into a mold). .

However, the aluminum has a high heat dissipation degree, but is less competitive than synthetic resins in productivity, processability, weight, price, and the like. For example, in the case of LED street light, the weight of the product is heavy, and the support is bent by the weight after construction, which shows various problems.

Therefore, there is a growing need for thermally conductive resins mixed with inorganic fillers in order to reduce weight and reduce manufacturing costs by replacing aluminum die-casting housing products.

That is, by adding a filler such as an insulating type containing a ceramic-based filler or a conductive type containing a carbon-based and metal powder to the resin, the overall thermal conductivity is increased, and processed into molded products and fillers to heat heat from the heating element to the outside or outside air. Will be dissipated.

In particular, LED lighting peripherals are required to dissipate heat from the heat source and the case in order to prolong the life of electronic devices, and attention to heat dissipation engineering synthetic resins is increasing, and the market size is still small, and high growth is expected in the future.

As related prior arts, Patent Literatures 1 to 3 disclose a technique in which an expanded graphite sheet is used as a heat dissipating material.

However, the conventional technology as described above is a structure in which expanded graphite is manufactured in a sheet form, that is, a structure is installed in a lower portion of a printed circuit board, and the LED lighting is not only bulky but also has a problem in that heat dissipation efficiency is extremely poor.

Nevertheless, the reason why the expanded graphite had to be formed as a separate structure was because the dispersibility of the expanded graphite was very low. In the case of manufacturing by injecting into the mold of the mold, since the dispersibility of the expanded graphite is very low, the molding thereof is very difficult, and there is a problem in that even if the molding is performed, the physical properties and heat dissipation characteristics of the final product are very poor.

: Republic of Korea Patent Publication No. 10-1034046 "Substrate for electronic components including expanded graphite sheet and light emitting diode lighting lamp comprising the same" : Republic of Korea Patent Publication No. 10-2008-0096083 "graphite composite sheet for heat diffusion, assembly and electronic device employing the same" : Republic of Korea Patent Publication No. 10-2011-0078577 "Method for producing polyurethane conductive nanocomposite using expanded graphite"

The present invention is to solve the problems as described above, after preparing a master batch of polyurethane / expanded graphite composites by In Situ reaction and then pulverized it to powder, synthetic resin, expanded graphite A high heat dissipation and light weight synthetic resin composition for LED lighting parts, and a method of manufacturing the same, characterized in that a compound pellet is prepared, and an article such as a light emitting diode (LED) lighting socket is manufactured by injection molding using the pellet. It is a subject to provide the article manufactured using this composition.

In particular, according to the present invention, the dispersion effect of the expanded graphite is very large as it is dispersed by using the laminated shape characteristic unique to the expanded graphite in the master batch manufacturing step, and the master when mixing the synthetic resin and expanded graphite in the manufacture of the compound pellet Batch powder acts as a compatibilizer at the interface between synthetic resin, a polymer matrix, and inorganic graphite, and more evenly dispersed, thereby improving heat dissipation characteristics of articles such as sockets, and thus having excellent heat dissipation characteristics. Another object is to provide a high heat dissipation and light weight synthetic resin composition, a method for producing the same, and an article manufactured using the composition.

In addition, the heat dissipation composition manufactured by the method described above is applied to various industrial groups with thermal problems in addition to the LED lighting sockets to reduce the weight and size of various structures (for example, street lamps). By making it possible, high heat dissipation for LED lighting parts, which can contribute greatly to heat dissipation of electronic materials and various industries in economic aspects such as heat dissipation characteristics, heat resistance, mechanical strength, miniaturization, light weight, and resource use and cost reduction. Another object is to provide a lightweight synthetic resin composition, a method for producing the same, and an article manufactured using the composition.

The present invention provides a method for producing a high heat dissipation and light weight synthetic resin composition for LED lighting components,

Preparing a polyol / expanded graphite mixed solution by adding a polyol, expanded graphite, water, and a catalyst into a mixer and mixing the mixture, followed by stirring (S1);

Preparing a polyurethane / expanded graphite master batch by injecting a polyol / expanded graphite mixed solution and an isocyanate into the reactor by an In Situ reaction (S2);

Grinding the polyurethane / expanded graphite master batch to produce a polyurethane / expanded graphite master batch powder (S3); And

Adding an engineering synthetic resin, expanded graphite, and polyurethane / expanded graphite master batch powder, an antioxidant, and a coupling agent to an extruder to form a master batch pellet (S4);

The manufacturing method of the high heat dissipation and light weight synthetic resin composition for LED lighting components characterized by manufactured through this is made | formed as a solution of a subject.

And this invention makes the high heat dissipation and light weight synthetic resin composition for LED lighting components manufactured by the said manufacturing method into another solution of a subject.

In addition, the present invention is made by using the composition, an article characterized in that the heat dissipation effect is excellent and light weight as another means of solving the problem.

According to the present invention, the expanded graphite and aluminum metal powders are not simply dispersed in an engineering synthetic matrix, but the polyurethane / expanded graphite master-batch powder manufactured using the In Situ method and the engineering synthetic resin and expanded By mixing graphite and using compound pellets, the dispersed shape of expanded graphite is dispersed by dispersing the laminated shape peculiar to expanded graphite in the master batch manufacturing step, and the dispersing effect of expanded graphite is very high, and the polymer matrix when manufacturing compounder with ABS resin and expanded graphite It acts as a compatibilizer at the interface of the expanded graphite, which is an inorganic material, to be evenly dispersed, and improves the heat dissipation characteristics of the final product and has a light weight.

In addition, the heat-dissipating composition prepared as described above is applied to various industrial groups with thermal problems in addition to LED lighting fixtures, thereby enabling the weight reduction and miniaturization of various structures (for example, a street lamp mounting stand) requiring heat dissipation. In terms of economics such as heat dissipation characteristics, heat resistance, mechanical strength, miniaturization, weight reduction, and resource use and cost reduction, it can greatly contribute to heat dissipation of electronic materials and various industries. In addition to meeting the company's green growth policy, it is expected to be actively used in various types of lighting supply projects in the future.

1 is a flow chart showing a method of manufacturing a high heat dissipation and lightweight synthetic resin composition for LED lighting components according to an embodiment of the present invention.
Figure 2 is a SEM (5000 times magnified) photograph showing the surface of the socket for LED lighting component according to an embodiment of the present invention
3 is a graph showing the surface temperature of the socket for the LED lighting component according to the embodiment and comparative example of the present invention

The present invention for achieving the above effect relates to a high heat-dissipating and lightweight synthetic resin composition for LED lighting parts, a method of manufacturing the same and an article manufactured using the composition, only the parts necessary for understanding the technical configuration of the present invention It should be noted that descriptions of other parts will be omitted so as not to obscure the subject matter of the present invention.

Hereinafter, the high heat dissipation and light weight synthetic resin composition for LED lighting parts according to the present invention and the manufacturing method thereof will be described in detail.

Method for producing a heat dissipating composition for LED lighting socket according to the present invention, as shown in Figure 1, preparing a polyol / expanded graphite mixture (S1), preparing a polyurethane / expanded graphite master batch (S2), It comprises a step (S3) of producing a polyurethane / expanded graphite master batch powder and a step (S4) of molding a master batch pellet.

The step of preparing the polyol / expanded graphite mixture (S1) is a step of preparing a polyol / expanded graphite mixture by adding a polyol, expanded graphite, water, and a catalyst into a mixer, followed by stirring, specifically, a polyol The expanded graphite mixed solution is prepared by adding 5 to 15 parts by weight of expanded graphite, 2 to 4 parts by weight of water, and 0.0001 to 0.0004 parts by weight of catalyst based on 100 parts by weight of polyol, and then performing the stirring step 1 to 3 times to prepare the polyol / expanded graphite mixture. Manufacture.

In the preparing of the polyurethane / expanded graphite master batch (S2), the polyurethane / expanded graphite master batch is prepared by injecting the polyol / expanded graphite mixture and isocyanate into the reactor by an in-situ reaction. In the step, the polyol / expanded graphite mixture is added to the reactor and stirred at 90 ~ 110rpm, while isocyanate is added to the polyol and the equivalence ratio 1: 1 to react in situ (In Situ) to synthesize a polyurethane / expanded graphite composite do.

The polyols, isocyanates, and catalysts used in the present invention are compositions commonly used in polyurethane synthesis processes, and polyols may be used alone or in polypropylene diols, polyester diols, polycarbonate diols, 1,4-butanediol, and ethylene glycol. 2 or more types can be selected and used in combination, and as isocyanate, single or 2 types or more can be selected and used among toluene diisocyanate (TDI) and diphenyl isocyanate (MDI), and water is used as a blowing agent, and a catalyst May be used alone or in combination of two or more selected from dibutyl tin dilaurate, cobalt octoate, triethanolamine, triethylenediamine, and tris (dimethylaminopropyl) amine.

On the other hand, when the mixing amount and the process conditions of the polyol, isocyanate, water, catalyst is outside the above range, there is a fear that the polyurethane / expanded graphite master batch is not formed properly.

The expanded graphite used in the present invention is a graphite in which crystalline graphite having excellent heat dissipation characteristics is oxidized in a solution of chromic acid and dilute sulfuric acid, and water is deposited between layers of graphite by heating and expanded to 100 to 700% relative to the initial volume. In the present invention, a void (heat conduction of air 0.028W / mK) is included therein, and the hexagonal ring structure has a unique laminated shape in which a planar layer is laminated. In order to disperse the specific lamination phenomenon, water is mixed with expanded graphite as polyol and blowing agent, and the polyol and water are penetrated between layers of expanded graphite, followed by urethane reaction with isocyanate through In Situ synthesis. By growing the urethane bonds between them, the dispersion effect of the expanded graphite is very large, and by reacting with isocyanate using water as a blowing agent In addition, carbon dioxide is generated to form a foam to maximize the dispersion effect of expanded graphite.

As the expanded graphite as described above, expanded graphite of various specifications may be used, but in the present invention, expanded graphite having a thickness of 50 to 80 nm and a size of 5 to 10 μm and a purity of 95 wt% or more is used.

In this case, the expanded graphite may be generally used expanded graphite, but in the present invention, expanded graphite in which graphite is expanded using a microwave dryer is used.

The reason is that the production of conventional expanded graphite was produced by expanding in a sintering furnace (expansion furnace) to which a dust collector is attached at a temperature of about 800 ° C. or higher. This is because the manufacturing process requires a large amount of energy sources and large-scale manufacturing equipment such as a dust collector and a sintering furnace.

Specifically, it is preferable to use a general graphite powder for the production of expanded graphite, the particle size may be a graphite of 10 ~ 100㎛, the drying efficiency of the microwave dryer is more than 0.5 liters per hour efficiency and high frequency It is desirable to use a microwave dryer with a magnetron power of 700W or more. When the graphite powder is dried in a microwave dryer for about 1 minute to 30 minutes depending on drying efficiency and high frequency output, heat may be instantaneously generated at about 800 ° C. or more, thereby producing expanded graphite having an apparent specific gravity of 200 to 400 ml / g. At this time, the moisture content of the graphite can be adjusted for faster drying efficiency, and acid such as sulfuric acid can be treated. When the moisture content is controlled, the self-heating temperature can be controlled by increasing the frictional heat generated by the moisture and polar molecules or ions in the graphite caused by the microwaves by vibrating or rotating due to the change of the polarity of the microwave. In addition, the acid treatment may play a role of improving the expansion ratio by the generation of carbon dioxide by the frictional heat and pyrolysis of the carboxyl group.

In the present invention, in the production of expanded graphite using graphite powder, the microwave dryer has a drying efficiency of about 0.4 to 0.6 per hour, specifically 0.5 liters, and a microwave dryer having a high frequency output of about 3000 to 3,400 W, specifically 3,200 W. To prepare expanded graphite by drying for 10 minutes, the apparent specific gravity of the prepared expanded graphite was about 200 ~ 400ml / g, specifically 380ml / g.

On the other hand, when the condition of the expanded graphite is out of the range, there is a fear that the heat radiation characteristics by the expanded graphite is lowered.

Therefore, the present invention is excellent in energy saving effect compared to the existing method by expanding the graphite using a microwave dryer for the production of expanded graphite, it is possible to manufacture expanded graphite with a relatively simple manufacturing equipment.

On the other hand, the expanded graphite as described above is mixed with 5 to 15 parts by weight of expanded graphite with respect to 100 parts by weight of polyol, when the mixed amount of the expanded graphite is less than 5 parts by weight, the heat dissipation and electrical conductivity is lowered as well as the plastic resin to be described later There is a fear that the compatibility when lowering, and when exceeding 15 parts by weight, the urethane synthesis by the in situ (In Situ) reaction may not be made.

The step of preparing the polyurethane / expanded graphite master batch powder (S3) is a step of pulverizing the powder by the polyurethane / expanded graphite master batch.

And, forming the master batch pellets (S4) is a step of molding the master batch pellets by injecting engineering synthetic resin, expanded graphite and the polyurethane / expanded graphite master batch powder, antioxidant and coupling agent to the extruder, Specifically, 3 to 10% by weight of the prepared polyurethane / expanded graphite master batch powder, 42 to 47% by weight of plastic resin and 43 to 55% by weight of expanded graphite are mixed and oxidized to 100 parts by weight of the mixed substrate. 0.1 to 0.3 parts by weight of the inhibitor, 1 to 5 parts by weight of the coupling agent is added, and then it is put into an extruder at 150 ~ 200 ℃ to produce a pellet (pellet).

The engineering synthetic resin used in the present invention is excellent in workability, impact resistance (impact absorption), chemical resistance, weather resistance, and the like, and in particular, as an engineering synthetic resin having excellent secondary processability such as molding and coloring such as injection molding and extrusion molding, Nitrile butadiene styrene copolymer (ABS, acrylonitrile butadiene styrene copolymer), polycarbonate resin (PC, PolyCarbonate), nylon (nylon) or polyphenylene sulfide (PPS, Polyphenylene Sulfide) selected alone or in combination use.

In addition, since the description of the polyurethane / expanded graphite master batch powder and expanded graphite has already been described above it will be omitted.

On the other hand, when the mixing amount of the polyurethane / expanded graphite master batch powder, engineering synthetic resin and expanded graphite constituting the substrate as described above deviates from the above conditions, it may not be molded into pellets or mechanical properties, heat dissipation performance, etc. may be deteriorated. .

In addition, the antioxidant used in the present invention, 3,5-di-tert-butyl-4-hydroxy toluene, 2,4,6-tri tert-butylphenol, styrenated phenol, 4-hydroxy-methyl -2,6-di-tert-butylphenol, 2,5-di-tert-butylhydroquinone, cyclohexylphenol, butyl hydroxyanizol, 2,2-methylene-bis (4-methyl-6-3 Butyl-phenol), 4,4-isopropylidene bisphenol, 1,1,3-tris (2-ethyl-4-hydroxy-5-tertbutyl-phenol) butane, 1,3,5-tris-methyl -2,4,6-tris (3,5-di-tertbutyl-4-hydroxybenzyl) benzene or tetrakis [methylene-3 (3,5-di-tert-butyl-4-hydroxy-phenol ) Propionate] methane can be used alone or two or more selected and used in combination, 0.1 to 0.3 parts by weight based on 100 parts by weight of the substrate consisting of the polyurethane / expanded graphite master batch powder, engineering synthetic resin and expanded graphite The mixing amount of the antioxidant is 0.1 parts by weight If less than that, there is a risk of discoloration or surface roughness during extrusion and injection processing, if exceeding 0.3 parts by weight, there is a fear that the migration of the antioxidant in the final product.

In addition, the coupling agent used in the present invention is a titanate-based coupling agent, isopropyl triisostearoyl titanate, isopropyl tris (N-aminoethyl-aminoethyl) Titanate (isopropyltris (N-aminoethyl-aminoethyl) titanate), tetraisopropylbis (dioctylphosphite) titanate, tetraoctylbis (ditridecylphosphite) titanate ( tetraoctylbis (ditridecylphosphite) titanate), tetra (2,2-diallylmethyl-1-butyl) bis (ditridecyl) phosphite titanate (tetra (2,2-diallyloxymethyl-1-butyl) bis (ditridecyl) phosphite titanate), bis (dioctylpyrophosphate) oxyacetate titanate (bis (dioctylpyrophosphate) oxyacetate titanate), isopropyl tridodecylbenzene sulfonyl titanate, iso Alone or two or more of them are selected from isopropyl di (dioctylphosphite) titanate or isopropyl tris (dioctylpyrophosphate) titanate It can be selected and used in combination, 1 to 5 parts by weight based on 100 parts by weight of the substrate consisting of the polyurethane / expanded graphite master batch powder, engineering synthetic resin and expanded graphite, the mixing amount of the coupling agent is less than 1 part by weight In this case, the mechanical properties of the final product extruded and injection processed may be lowered, and if it exceeds 5 parts by weight, the coupling agent may occur in the final product.

On the other hand, if the process conditions such as temperature, time, etc. of forming the master batch pellet (S4) is out of the above range, there is a fear that the mechanical properties of the product is lowered.

Hereinafter, the manufacturing method of the article using the high heat dissipation and light weight synthetic resin composition for LED lighting parts according to the present invention will be described in detail.

Here, the article includes not only LED lighting sockets, housings and various components but also various structures (for example, mounting lamps for street lamps) that are applied to various industrial groups with thermal problems and require heat dissipation.

Among the articles as described above, the LED lighting socket is described as an example, preparing a polyol / expanded graphite mixture as described above (S1), preparing a polyurethane / expanded graphite master batch (S2), polyurethane / expanded The surface as shown in FIG. 2 by injection molding the master batch pellets formed through the step (S3) and the step of forming the master batch pellets (S4) of the graphite master batch powder through an injection machine of 200 ~ 250 ℃ The LED lighting socket is manufactured.

On the other hand, during the injection molding, if the process conditions, such as temperature, time, etc. are out of the above range, there is a fear that the molding of the final product may not be made smoothly, mechanical properties may also be lowered.

Hereinafter, the present invention will be described in more detail with reference to the following examples, which are not intended to limit the present invention.

On the other hand, among the articles as described above, LED lighting sockets were manufactured as examples and comparative examples, and thermal conductivity and surface temperature thereof were measured.

1. Manufacturing of LED Lighting Sockets

(Example 1)

As a step (S1) of preparing a polyol / expanded graphite mixture, 5 parts by weight of expanded graphite, 2 parts by weight of water, and 0.0001 parts by weight of dibutyltin dilaurate are added to 100 parts by weight of polypropylene diol, followed by a single stirring process. After preparing the polyol / expanded graphite mixture and preparing a polyurethane / expanded graphite master batch (S2), toluene diisocyanate (TDI) is added to the polyol / expanded graphite mixture in a reactor and stirred at 90 rpm. In step (S3) to prepare a polyurethane / expanded graphite master batch by the in-situ (In Situ) reaction, and to prepare a polyurethane / expanded graphite master batch powder by the polyol and equivalent ratio of 1: 1, the prepared poly The polyurethane / expanded graphite master batch is pulverized to produce a polyurethane / expanded graphite master batch powder, and then, as a step (S4) of forming the master batch pellets, the prepared 3% by weight of polyurethane / expanded graphite master batch powder, 42% by weight of acrylonitrile butadiene styrene copolymer (ABS) and 55% by weight of expanded graphite were mixed, and based on 100 parts by weight of the mixed substrate , 0.1 part by weight of antioxidant, 1 part by weight of coupling agent was added to the extruder at 150 ° C. to produce pellets, and the prepared heat dissipating composition for the LED lighting socket of pellets at 200 ° C. Injection molding through an injection molding machine to produce an LED lighting socket.

(Example 2)

As a step (S1) of preparing a polyol / expanded graphite mixture, 10 parts by weight of expanded graphite, 3 parts by weight of water, and 0.0003 parts by weight of dibutyltin dilaurate were added to 100 parts by weight of polyester diol, followed by two stirring processes. After preparing the polyol / expanded graphite mixture, and preparing a polyurethane / expanded graphite master batch (S2), toluene diisocyanate (TDI) is added to the polyol / expanded graphite mixed solution into the reactor and stirred at 100 rpm In step (S3) to prepare a polyurethane / expanded graphite master batch by the in-situ (In Situ) reaction, and to prepare a polyurethane / expanded graphite master batch powder by the polyol and equivalent ratio of 1: 1, the prepared poly The polyurethane / expanded graphite master batch is pulverized to produce a polyurethane / expanded graphite master batch powder, and then, as a step (S4) of forming the master batch pellets, the prepared 4% by weight of polyurethane / expanded graphite master batch powder, 43% by weight of acrylonitrile butadiene styrene copolymer (ABS) and 53% by weight of expanded graphite were mixed, and 100 parts by weight of the mixed substrate was used. , 0.2 parts by weight of antioxidant, 3 parts by weight of coupling agent was added to an extruder at 170 ° C. to produce pellets, and the heat-dissipating composition for LED light sockets of the pellets prepared above was prepared at 220 ° C. Injection molding through an injection molding machine to produce an LED lighting socket.

(Example 3)

As a step (S1) of preparing a polyol / expanded graphite mixture, 15 parts by weight of expanded graphite, 4 parts by weight of water, and 0.0004 parts by weight of dibutyltin dilaurate were added to 100 parts by weight of polycarbonate diol, followed by three stirring processes. To prepare a polyol / expanded graphite mixture, and to prepare a polyurethane / expanded graphite master batch (S2), toluene diisocyanate (TDI) is added while the polyol / expanded graphite mixture is added to the reactor and stirred at 110 rpm In step (S3) to prepare a polyurethane / expanded graphite master batch by the in-situ (In Situ) reaction, and to prepare a polyurethane / expanded graphite master batch powder by the polyol and equivalent ratio of 1: 1, the prepared The polyurethane / expanded graphite master batch is pulverized to produce a polyurethane / expanded graphite master batch powder, and then, the step of forming the master batch pellet (S4), the preparation 10% by weight of the prepared polyurethane / expanded graphite master batch powder, 47% by weight of nylon (nylon) and 43% by weight of expanded graphite, 0.3 part by weight of antioxidant, 5 parts by weight of coupling agent, based on 100 parts by weight of the mixed substrate. After the addition, the pellet was put into an extruder at 200 ° C. to produce pellets, and the LED heat socket was manufactured by injection molding the prepared heat dissipating composition for the pellet-shaped LED light socket through a 250 ° C. injection machine. It was.

(Comparative Example 1)

100 parts by weight of an acrylonitrile butadiene styrene copolymer (ABS) and 100 parts by weight of a substrate composed of 50% by weight of expanded graphite, 0.3 parts by weight of antioxidant and 3 parts by weight of coupling agent were added, followed by 200 ° C. Into the extruder of a pellet (pellet) to produce a master batch and injection molding through an injection machine at 250 ℃ to produce an LED lighting socket.

2. Evaluation of LED Lighting Sockets

The LED lighting sockets prepared by Examples 1 to 3 and Comparative Example 1 were evaluated in the following manner.

1) Thermal Conductivity: According to ASTM E 1461, the surface of the flat plate sample maintained at a constant temperature is pulsed and heat is diffused one-dimensionally from the surface of the sample that is heated up at the moment. The thermal conductivity was measured on the principle of uniform temperature, and the results are shown in [Table 1] below.

2) Surface temperature: After measuring five times using an infrared thermometer, the average value was shown, the results are shown in Figure 3 below.

division Thermal Conductivity (W / m.k) Example 1 7.6 Example 2 12.2 Example 3 15.5 Comparative Example 1 5.8

As shown in Table 1, the LED lighting sockets according to Examples 1 to 3 are not only better in thermal conductivity than the LED lighting sockets according to Comparative Example 1, and as shown in FIG. LED lighting socket according to the surface temperature is lower than the LED lighting socket according to Comparative Example 1 it can be seen that the heat dissipation characteristics are excellent.

As described above, the high heat dissipation and light weight synthetic resin composition for LED lighting parts according to a preferred embodiment of the present invention, a method for manufacturing the same and an article manufactured using the composition have been described according to the above description and drawings. Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit and scope of the present invention.

S1: preparing a polyol / expanded graphite mixture
S2: preparing the polyurethane / expanded graphite master batch
S3: step of preparing polyurethane / expanded graphite master batch powder
S4: step of forming master batch pellets

Claims (7)

In the manufacturing method of high heat dissipation and light weight synthetic resin composition for LED lighting parts,
Preparing a polyol / expanded graphite mixed solution by adding a polyol, expanded graphite, water, and a catalyst into a mixer and mixing the mixture, followed by stirring (S1);
Preparing a polyurethane / expanded graphite master batch by injecting a polyol / expanded graphite mixed solution and an isocyanate into the reactor by an In Situ reaction (S2);
Grinding the polyurethane / expanded graphite master batch to produce a polyurethane / expanded graphite master batch powder (S3); And
Adding an engineering synthetic resin, expanded graphite, and polyurethane / expanded graphite master batch powder, an antioxidant, and a coupling agent to an extruder to form a master batch pellet (S4);
Method for producing a high heat dissipation and light weight synthetic resin composition for LED lighting components, characterized in that it is produced through.
The method of claim 1,
In the step (S1) of preparing the polyol / expanded graphite mixture,
The polyol / expanded graphite mixture is prepared by adding 5 to 15 parts by weight of expanded graphite, 2 to 4 parts by weight of water, and 0.0001 to 0.0004 parts by weight of catalyst based on 100 parts by weight of the polyol, followed by 1 to 3 stirring steps. Method for producing a high heat dissipation and light weight synthetic resin composition for LED lighting parts.
The method of claim 1,
In the step (S2) of preparing the polyurethane / expanded graphite master batch,
Polyurethane / expanded graphite master batch is a method for producing a high heat dissipation and light weight synthetic resin composition for LED lighting parts, characterized in that the polyol and isocyanate is prepared by adding and reacting the equivalent ratio of 1: 1.
The method of claim 1,
In the step (S4) of forming the master batch pellets,
The master batch pellets are mixed base material of 3-10 wt% of master batch powder, 42-47 wt% of engineering synthetic resin and 43-55 wt% of expanded graphite,
To 100 parts by weight of the mixed base material, 0.1 to 0.3 parts by weight of antioxidant, 1 to 5 parts by weight of coupling agent is added, and then put into an extruder at 150 ~ 200 ℃ to form a pellet (pellet) Method for producing a high heat dissipation and light weight synthetic resin composition for lighting parts.
The method according to any one of claims 1 to 4,
The expanded graphite,
A method for producing a high heat dissipation and light weight synthetic resin composition for LED lighting parts, characterized in that the expanded graphite expanded graphite using a microwave dryer.
The high heat dissipation and light weight synthetic resin composition for LED lighting parts manufactured by the manufacturing method of any one of Claims 1-4.
An article manufactured using the composition of claim 6, which is excellent in heat dissipation effect and light weight.

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