Secondary dimming light diffusion material applied to LED lamp and preparation method of secondary dimming light diffusion material

Abstract

The invention discloses a secondary dimming light diffusion material applied to an LED lamp and a preparation method of the secondary dimming light diffusion material. The secondary dimming light diffusion material comprises the following raw materials in percentage by weight: 94.09% of a phase A; 2.91% of a phase B; and 3% of a phase C; the phase A is prepared from the following raw materials in percentage by weight: 55 to 95 percent of polydimethylmethylvinylsiloxane, 5 to 45 percent of silicon dioxide, 0 to 8 percent of hydroxyl-terminated polydimethylsiloxane and 0 to 1 percent of auxiliaries; the phase B is prepared from the following raw materials in percentage by weight: 70 to 80 percent of silicon dioxide, 10 to 20 percent of polydimethylsiloxane, 6 to 10 percent of 107 raw rubber and 1.8 to 2.2 percent of dispersing agent; the phase C is prepared from the following raw materials in percentage by weight: 60 to 70 percent of silicon dioxide, 10 to 20 percent of polydimethylsiloxane, 6 to 10 percent of 107 raw rubber, 4 to 6 percent of titanium dioxide and 5.88 to 7.78 percent of dispersing agent; and 0.12 to 0.22 percent of pigment. Titanium dioxide is added in the light diffusion material of the lamp, so that the problem that the color temperature of the LED lamp drifts seriously due to the use of the light diffusion material is solved, and the LED lamp can meet the color requirement of high-quality light.

Description

Technical Field

[0001] The present application relates to the technical field of polymer compound compositions, and in particular to a light diffusion material used for secondary dimming of LED lamps, and a preparation method thereof. Background Art

[0002] LED light color temperature refers to the color of the LED light when it is emitting light, and is the standard for measuring color temperature. The raw materials of light diffusion materials commonly used for secondary dimming of LED lights are counted by weight percentage:

[0003] a phase 97%;

[0004] b phase 3%;

[0005] in,

[0006] The raw materials of phase a include by weight percentage:

[0007]

[0008] The raw materials of phase b include by weight percentage:

[0009]

[0010] When waterproofing LED lamps, waterproofing is usually achieved by placing the LED lamps in a silicone lamp strip made of light diffusion material or dripping glue on the surface of the LED lamps. When used, components a and b are mixed evenly with a rubber mixer to obtain a material body, and then 1% of a curing agent is added to the material body and continued to be mixed evenly. After co-extrusion with the LED lamp, it is heated at 120-130°C for 2-3 minutes and then cured. The raw materials of the curing agent include 20-30% silicon dioxide, 10-20% platinum catalyst, 50-55% hydrogen-containing siloxane and 2-5% inhibitor in terms of weight percentage.

[0011] However, after the LED lamp is placed inside the silicone light strip through the co-extrusion process, the light emitted by the LED lamp will diffuse through the above silicone light strip and cause a change in color temperature, resulting in the inability to accurately control the color of the product and the color of the finished LED light strip, and the user cannot get the accurate lighting color they want. Summary of the invention

[0012] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a light diffusion material for secondary dimming of LED lamps and a preparation method thereof, and the technical solution adopted includes:

[0013] A light diffusion material used for secondary dimming of LED lamps, with A phase 94.09%;

[0014] Phase B 2.91%; and

[0015] Phase C 3%;

[0016] The raw materials of phase A include by weight percentage:

[0017]

[0018]

[0019] The raw materials of phase B include by weight percentage:

[0020]

[0021] The raw materials of phase C include by weight percentage:

[0022]

[0023] The technical solution adopted by an embodiment of the present invention to solve the technical problem is: the molecular weight of the polydimethylmethylvinylsiloxane in the A phase is 610,000-620,000.

[0024] A technical solution adopted by an embodiment of the present invention to solve the technical problem is: the viscosity of the hydroxyl-terminated polydimethylsiloxane in the A phase is 950-1050 Pa·s.

[0025] The technical solution adopted by an embodiment of the present invention to solve the technical problem is: the dispersants in the phase A, phase B and phase C are all methyl silicone oil, and the viscosity of the methyl silicone oil is 9900-10100 Pa·s.

[0026] The technical solution adopted by an embodiment of the present invention to solve its technical problem is: the particle size of the silicon dioxide in the A phase, the B phase and the C phase is less than or equal to 200 mesh, and the particle size of the titanium dioxide in the C phase is less than or equal to 200 mesh.

[0027] The technical solution adopted by an embodiment of the present invention to solve the technical problem is: the molecular weight of the polydimethylsiloxane in the phase B and the phase C is 610,000-620,000.

[0028] The technical solution adopted by an embodiment of the present invention to solve the technical problem is: the molecular weight of the 107 raw rubber in the B phase and the C phase is 670,000-580,000.

[0029] The method for preparing the light diffusion material used for secondary dimming of LED lamps in the present invention comprises:

[0030] Step 1, weighing phase A, phase B and phase C materials respectively according to the formula, and using a fine grinder to make the particle size of silicon dioxide and titanium dioxide less than 200 mesh;

[0031] Step 2, mixing the raw materials of phase A and phase B uniformly with a rubber mixer to obtain a material body 1;

[0032] Step 3: Put the material body 1 and the C-phase raw material into a mixer, and mix them evenly to obtain a secondary dimming light diffusion material.

[0033] Beneficial effects of the present invention:

[0034] Light diffusion materials used as LED waterproof materials can solve the problem of LED light color drift caused by the use of existing waterproof materials, avoid the problem of serious color temperature drift of LED lights after waterproof treatment of existing LED lights, solve the problem of serious color temperature drift of LED lights after waterproof treatment, and make LED lights meet the color requirements of high-quality light;

[0035] The light emitted by the LED lamp beads is also dimmed for the second time to improve the color temperature drift of the light emitted by the LED lamp beads, further making the color temperature of the LED lamp more accurate and meeting the color requirements of high-quality light. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0037] Figure 1 This is a color temperature detection diagram after the light diffusion material in Example 1 is applied to a bare LED light source board with a color temperature of 1800K;

[0038] Figure 2 This is a color temperature detection diagram after the light diffusion material in Example 1 is applied to a bare board of an LED light source with a color temperature of 5000K;

[0039] Figure 3 This is a color temperature detection diagram after the light diffusion material in Example 1 is applied to a bare board of an LED light source with a color temperature of 12000K;

[0040] Figure 4 This is a color temperature detection diagram of a bare LED light source with a color temperature of 1800K in Comparative Example 1;

[0041] Figure 5 This is a color temperature detection diagram of a bare LED light source with a color temperature of 5000K in Comparative Example 1;

[0042] Figure 6 This is a color temperature detection diagram of a bare LED light source with a color temperature of 12000K in Comparative Example 1;

[0043] Figure 7 This is a color temperature detection diagram after the light diffusion material in Comparative Example 2 is applied to a bare LED light source board with a color temperature of 1800K;

[0044] Figure 8 This is a color temperature detection diagram after the light diffusion material in Comparative Example 2 is applied to a bare LED light source board with a color temperature of 5000K;

[0045] Fig. 9 This is a color temperature detection diagram after the light diffusion material in Comparative Example 2 is applied to a bare LED light source board with a color temperature of 12000K. DETAILED DESCRIPTION

[0046] This section will describe the specific embodiments of the present invention in detail. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as limiting the scope of protection of the present invention. In the description of the present invention, the meaning of "more than" is more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself.

[0047] The raw materials of the secondary dimming light diffusion material described in this application include, by weight percentage:

[0048] Phase A 94.09%;

[0049] Phase B 2.91%; and

[0050] Phase C 3%;

[0051] The raw materials of phase A include by weight percentage:

[0052]

[0053] The raw materials of phase B include by weight percentage:

[0054]

[0055] The raw materials of phase C include by weight percentage:

[0056]

[0057] In this application, the dispersants in phase A, phase B and phase C are all methyl silicone oil;

[0058] The silicon dioxide in phases A, B and C was finely ground to a particle size of less than or equal to 200 meshes by a fine grinder; the pigment in phase C was purchased from BASF with the brand name Blue K 7090.

[0059] Based on the above content, embodiments of the present application are proposed. The specific technical specifications of the raw materials of the A phase, B phase, and C phase of the light diffusion material in embodiments 1-3 are shown in Tables 1-3.

[0060] Table 1

[0061]

[0062]

[0063] In Examples 1-3, the molecular weight of the polydimethylmethylvinylsiloxane in phase A is 610,000-620,000;

[0064] The particle size of silicon dioxide is less than or equal to 200 mesh;

[0065] The viscosity of hydroxyl-terminated polydimethylsiloxane is 950-1050 Pa·s;

[0066] The viscosity of methyl silicone oil is 10000Pa·s-10100Pa·s.

[0067] Table 2

[0068]

[0069]

[0070] In Examples 1-3, the particle size of the silicon dioxide in phase B is less than or equal to 200 mesh; the molecular weight of the polydimethylsiloxane is 610,000-620,000;

[0071] The molecular weight of 107 raw rubber is 580,000-670,000;

[0072] The viscosity of methyl silicone oil dispersant is 9900-10100 Pa·s.

[0073] Table 3

[0074]

[0075]

[0076] In Examples 1-3, the C phase

[0077] The particle sizes of silicon dioxide and titanium dioxide are both less than or equal to 200 mesh;

[0078] The molecular weight of polydimethylsiloxane is 610,000-620,000;

[0079] The molecular weight of 107 raw rubber is 580,000-670,000 molecular weight;

[0080] The grade of titanium dioxide is Huntsman RTC30;

[0081] The viscosity of methyl silicone oil dispersant is 9900-10100 Pa·s;

[0082] The brand of the pigment is BASF Blue K 7090.

[0083] After the raw materials in Examples 1-3 are prepared, the method for preparing the light diffusion material in Examples 1-3 includes:

[0084] Step 1, weighing phase A, phase B and phase C materials respectively according to the formula, and using a fine grinder to make the particle size of silicon dioxide and titanium dioxide less than 200 mesh;

[0085] Step 2, mixing the raw materials of phase A and phase B uniformly with a rubber mixer to obtain a material body 1;

[0086] Step 3: Put the material body 1 and the C-phase raw material into a mixer, and mix them evenly to obtain a secondary dimming light diffusion material.

[0087] 1% by weight of curing agent was added to the light diffusion material prepared in Example 1 and mixed evenly. Then, the mixture was co-extruded with bare LED light source boards with color temperatures of 1800K, 5000K and 12000K, respectively, and cured after heating at 120-130°C for 2-3 minutes. The spectrum of light passing through the light diffusion material of Example 1 was tested, and the test reports were as follows: Figure 1-3 shown.

[0088] Comparative Example 1

[0089] The spectrum of bare LED light source with color temperature of 1800K, 5000K and 12000K is tested. The test report is as follows: Figure 4-6 shown.

[0090] Comparative Example 2

[0091] The raw materials of the light diffusion material in Comparative Example 2 include, by weight percentage:

[0092] a phase 97%;

[0093] b phase 3%;

[0094] in,

[0095] The raw materials of phase a include by weight percentage:

[0096]

[0097] The raw materials of phase b include by weight percentage:

[0098]

[0099]

[0100] The specific raw material percentages of phase a and phase b in Comparative Example 2 are shown in Table 5.

[0101] Table 5

[0102]

[0103]

[0104] The preparation method of the light diffusion material in Comparative Example 2 is:

[0105] Step 1, weigh the raw materials of phase a and phase b respectively according to the formula, and use a fine grinder to make the particle size of silicon dioxide less than or equal to 200 mesh;

[0106] Step 2: Mix the raw materials of phase A and phase B by using a rubber mixer to obtain a light diffusion material.

[0107] The light diffusion material prepared in Comparative Example 2 was added with 1% by weight of a curing agent and mixed evenly, and then co-extruded with bare LED light source boards with color temperatures of 1800K, 5000K and 12000K, respectively, and cured after heating at 120-130°C for 2-3 minutes. The spectrum passing through the light diffusion material of Comparative Example 2 was tested, and the test reports were as follows: Figure 7-9 shown.

[0108] In Example 1 and Comparative Example 2, the specific raw materials of each component of the curing agent and their technical specifications are shown in Table 4.

[0109] Table 4

[0110]

[0111]

[0112] according to Figure 1-9 From the content:

[0113] (1) Based on Figure 4-6 The test results show that the color temperatures of the bare board LED light sources of 1800K, 5000K and 12000K are 1760K, 5006K and 11968K, respectively. The color temperatures of the bare board LED light sources all have color drift.

[0114] (2) Based on Figure 7-9 The test results show that the light diffusion material obtained in Comparative Example 2 is applied to 1800K, 5000K and 12000K LED light source bare boards, and the final color temperatures obtained are: 1679K, 4193K, 7472K, respectively. Compared with Comparative Example 1, the light diffusion material used in Comparative Example 2 causes a larger drift in the color temperature of the LED light source bare board;

[0115] (3) Based on Figure 1-3The test results show that the light diffusion material obtained in Example 1 is applied to 1800K, 5000K and 12000K LED light source bare boards, and the final color temperatures obtained are: 1766K, 5043K, 12282K;

[0116] Compared with Comparative Example 2, Example 1 has basically no change in color temperature, the color temperature of the LED lamp is accurate, the influence of existing light diffusion materials on the color temperature of the LED is solved, the color drift problem of the LED after waterproofing treatment is solved, and the problem that the color temperature of the LED light source cannot be accurately controlled, resulting in the inability to control the color of the LED finished light strip; it also improves the phenomenon of color temperature drift of the LED lamp itself.

[0117] Of course, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications and substitutions are all included in the scope defined by the claims of this application.

Claims

1. A light diffusion material for secondary dimming of LED lamps, characterized in that: The raw materials include by weight percentage: Phase A 94.09%; Phase B 2.91%; and Phase C 3%; The raw materials of phase A include by weight percentage: The raw materials of phase B include by weight percentage: The raw materials of phase C include by weight percentage:

2. The light diffusion material for secondary dimming of LED lamps according to claim 1, characterized in that: The molecular weight of the polydimethylmethylvinylsiloxane in the phase A is 610,000-620,000.

3. The light diffusion material for secondary dimming of LED lamps according to claim 1, characterized in that: The viscosity of the hydroxyl-terminated polydimethylsiloxane in the phase A is 950-1050 Pa·s.

4. The light diffusion material for secondary dimming of LED lamps according to claim 1, characterized in that: The dispersants in the phase A, phase B and phase C are all methyl silicone oil, and the viscosity of the methyl silicone oil is 9900-10100 Pa·s.

5. The light diffusion material for secondary dimming of LED lamps according to claim 1, characterized in that: The particle size of the silicon dioxide in the phase A, phase B and phase C is less than or equal to 200 meshes, and the particle size of the titanium dioxide in the phase C is less than or equal to 200 meshes.

6. The light diffusion material for secondary dimming of LED lamps according to claim 1, characterized in that: The molecular weight of the polydimethylsiloxane in the phase B and phase C is 610,000-620,000.

7. The light diffusion material for secondary dimming of LED lamps according to claim 1, characterized in that: The molecular weight of the 107 raw rubber in the phase B and phase C is 670,000-580,000.

8. A method for preparing a light diffusion material for secondary dimming of LED lamps as claimed in any one of claims 1 to 7, characterized in that: include: Step 1, weighing phase A, phase B and phase C materials respectively according to the formula, and using a fine grinder to make the particle size of silicon dioxide and titanium dioxide less than 200 mesh; Step 2, mixing the raw materials of phase A and phase B uniformly with a rubber mixer to obtain a material body 1; Step 3: Put the material body 1 and the C-phase raw material into a mixer, and mix them evenly to obtain a secondary dimming light diffusion material.

Images