KR101147271B1 - Silicon composition for back light unit lamp holder of liquid crystal display - Google Patents

Abstract

The present invention relates to a silicone polymer composition for a lamp holder, which is a BLU (Back Light Unit) component of a liquid crystal display. More specifically, the present invention relates to a multifunctional silicone polymer composition which simultaneously imparts heat resistance, conductivity and flame retardancy to be applicable to a lamp holder. The present invention also relates to a lamp holder that can simplify the manufacturing process of a liquid crystal display using the silicone polymer composition.

Description

Silicone polymer composition for backlight unit lamp holder of liquid crystal display device {SILICON COMPOSITION FOR BACK LIGHT UNIT LAMP HOLDER OF LIQUID CRYSTAL DISPLAY}

The present invention relates to a silicone polymer composition for a lamp holder, which is a BLU (Back Light Unit) component of a liquid crystal display. More specifically, the present invention relates to a multifunctional silicone polymer composition which simultaneously imparts heat resistance, conductivity and flame retardancy to be applicable to a lamp holder. The present invention also relates to a lamp holder that can simplify the manufacturing process of a liquid crystal display using the silicone polymer composition.

Liquid crystal displays (LCDs) display images by using electrical and optical characteristics of liquid crystals. The liquid crystal display device is widely used throughout the industry because it has a significant reduction in thickness compared to other display display devices, light weight, low power consumption, and low driving voltage. The backlight assembly employed in the liquid crystal display (LCD) includes a lamp for generating light, a lamp holder for supplying stable power, a lamp assembly having the same, and a power line for transferring power to the lamp. In general, a plurality of lamps exist to improve the brightness of light, and power lines are soldered to the electrodes of the lamps to transmit power applied from the outside to each lamp.

However, the current silicon lamp holder has only heat resistance and flame retardant function, and the power line electrically connected by soldering with the electrode of each lamp has a problem of easily disconnected by force from the soldered part to the outside, and the electrode of the lamp is also external There is a problem that is easily broken by the impact of.

In addition, several lamp holders are used to stabilize the power supplied to each fluorescent lamp to emit a plurality of fluorescent lamps, which increases the number of assembly operations, increases the size of the entire product, and increases the manufacturing cost. I have it.

In order to solve this problem, it is necessary to develop a new silicon composite material having both heat resistance, conductivity, and flame retardant properties, simplify the manufacturing process, and optimize a required function to develop a high value-added silicon composite material.

The present invention has been made to solve the above problems, and an object thereof is to provide a new silicon composite material having both physical properties of heat resistance, conductivity and flame resistance.

In addition, the present invention can be manufactured in the form that can be detachable lamp by extrusion and injection using the new silicone composite material and has a heat resistance, conductivity and flame retardant properties, so the assembly is detachable without the need for a separate soldering process It is an object of the present invention to provide a lamp holder for an LCD using a new silicon composite material that can simplify the manufacturing process.

The present invention is a polymethyl vinyl siloxane resin, polymethyl vinyl phenyl siloxane resin at least one selected from 50 to 70% by weight, silicon dioxide 10 to 30% by weight, silandiol 1 to 10% by weight and diphenylsilanediol 1 100 to 500 parts by weight of nickel-coated graphite, 1.5 to 4 parts by weight of a curing agent, 0.1 to 5 parts by weight of a heat resistant agent, and 0.1 to 5 parts by weight of a flame retardant, based on 100 parts by weight of a silicone compound base resin including about 10% by weight. The present invention relates to a silicone polymer composition for a backlight unit lamp holder of a liquid crystal display device.

The present invention may further include 50 to 90 parts by weight of carbon black as necessary.

Method for producing a silicone polymer composition for a backlight unit lamp holder of the liquid crystal display device of the present invention

a) 50 to 70% by weight of at least one silicone resin selected from polymethylvinylsiloxane resin, polymethylvinylphenylsiloxane resin, 10 to 30% by weight of silicon dioxide, 1 to 10% by weight of silanediol and 1 to 1 of diphenylsilanediol. Compounding 10% by weight to prepare a silicone compound base resin;

b) kneading by adding 100 to 500 parts by weight of nickel coated graphite, based on 100 parts by weight of the silicone compound base resin;

c) preparing a silicone rubber composition by adding 0.1 to 5 parts by weight of a heat resistant agent and 0.1 to 5 parts by weight of a flame retardant and mixing the mixture uniformly, and then adding 1.5 to 4 parts by weight of a curing agent;

It includes.

The present inventors are characterized by providing a new silicone composite material having physical properties of heat resistance, conductivity and flame retardancy at the same time, and they are characterized by a combination and content range of components in order to express physical properties at the same time. In particular, in the present invention, it was found that the conductivity is greatly improved by using graphite coated with nickel as the conductive particles. In addition, when the nickel-coated graphite and carbon black, in particular, acetylene carbon black when used in combination to find that the conductivity is significantly improved by the synergy effect was completed the present invention.

Hereinafter, each component of the present invention will be described in more detail.

In the present invention, the silicone compound base resin includes at least one silicone resin selected from polymethylvinylsiloxane resin and polymethylvinylphenylsiloxane resin, and compounded by adding silicon dioxide, silanediol, and diphenylsilanediol, Mechanical properties (tensile, elongation, tear) and heat resistance can be improved.

In the present invention, the polymethylvinylsiloxane resin has a weight average molecular weight of 400,000 to 800,000 g / mol, and is preferable to achieve optimum physical properties and extrusion conditions in a vinyl group content of 0.2 to 11 mol%. If the vinyl group content is less than 0.2 mol%, the mechanical properties of the rubber (tensile, elongation, tear) is lowered, and if the vinyl group content is more than 11 mol%, the hardness is high and the physical properties are lowered, which is not preferable.

The polymethylvinylphenylsiloxane resin has a weight average molecular weight of 400,000 to 800,000 g / mol, a vinyl group content of 0.2 to 11 mol%, and preferably 10 to 25 mol% of the methyl group content is substituted with a phenyl group. . When the phenyl group is substituted with 10 to 25 mol%, it is preferable to achieve heat resistance. When the phenyl group is substituted by less than 10 mol%, the heat resistance effect is insignificant, and when the phenyl group is substituted by more than 25 mol%, the cost increases, which is not preferable.

The silicon dioxide is used to reinforce physical properties such as tensile and elongation, and it is preferable to use one having a B.E.T of 100 to 300 m 2 / g to achieve optimum physical properties. The content is preferably 10 to 30% by weight to achieve hardness and extrusion workability. If the content is less than 10% by weight, extrusion workability is poor, and if the content is more than 30% by weight, the hardness is high, which is not preferable.

The silanediol is used to improve the extrusion workability, the content is preferably used because 1 to 10% by weight can achieve the optimal extrusion workability. If less than 1% by weight extrusion workability is lowered, if more than 10% by weight plasticity is lowered may cause problems in workability is not preferred.

It is used to achieve the durability of the diphenylsilanediol, the content is preferably used because 1 to 10% by weight can achieve the optimal durability. If it is less than 1% by weight, durability is lowered, and if it is more than 10% by weight, plasticity is high, which may cause problems in extrusion workability, which is not preferable.

In the present invention, the nickel coated graphite is used to impart conductivity, and in particular, when the nickel content is coated with 70 to 80% by weight, it is preferable because the conductivity is very excellent. Specific product names include NCG-75 of Novamet Specialty Products Corporation and E-FILL ^™ 2801 of Sulzer Metco (Canada), but are not limited thereto. The nickel-coated graphite is preferably 100 to 500 parts by weight based on 100 parts by weight of the silicone compound base resin. When using less than 100 parts by weight is difficult to use because of high resistance, when used in excess of 500 parts by weight is too low workability and resistance, there is a problem in mixing, the cost may rise and physical properties may be lowered.

In addition, carbon black may be added together with the nickel-coated graphite, if necessary, and the carbon black is used to impart conductivity, and acetylene black is a low cost among acetylene black, channel black, and thermal black, and carbon structure Capillary pores are preferred because of their excellent conductivity. However, since acetylene black is poor in compatibility with the silicone-based polymer, this problem can be solved by kneading at 60 to 70 ° C. for 15 to 20 minutes. If the kneading time is less than 15 minutes, the rubber compound is difficult to combine, and if more than 20 minutes, the adhesive force is generated by the strong shear force. At this time, it is preferable to use 50 to 90 parts by weight based on 100 parts by weight of the silicone resin. Synthetic effect can be expressed with nickel coated graphite in the above content range. In other words, it acts as a bridging to reduce the adjacent distance between the nickel-coated graphite conductive particles, induces a synergy effect to facilitate the formation of a conductive network inside the composite material and at the same time conductive cluster It can play a role in expanding the area.

The curing agent is 2,5-dimethyl-2,5-di (t-butylperoxy) hexane (2,5-Dimethyl-2,5-di (tert-butylperoxy) hexane), di- (2,4-dichloro Benzoyl) -peroxide (Di- (2,4-dichlorobenzoyl) -peroxide), dibenzoyl peroxide, Dicumyl peroxide, Di-t-butylperoxide , t-butylcumylperoxide (t-butylcumylperoxide) using any one or more selected, specific examples thereof, Akzo Nobel's Trigonox 101, Trigonox 101-50D-pd, Trigonox 101-45S-ps, Trigonox 101-45B-pd, Perkadox PD-50S-ps, Lucidol S-50S-ps, Perkadox BC-40MB-gr (40%), Trigonox B (99%), Trigonox T-50D-pd (50%, on silica Dow's LS 4, LS 5, LS 2, etc., but is not limited thereto. It is preferable to use the said hardening | curing agent at 1.5-4 weight part with respect to 100 weight part of silicone compound base resins. When the amount is less than 1.5 parts by weight, the uncured silicone compound base resin occurs, and when used in excess of 4 parts by weight, the overall mechanical properties decrease due to overcure.

The heat resistant agent may use a rare earth metal-based heat resistant agent, and specific product names include RBM-9002 of XIAMETER and SILCOSPERSE 300 of GSDI, but are not limited thereto. The content is preferably 0.1 to 5 parts by weight based on 100 parts by weight of the silicone compound base resin. When using less than 0.1 parts by weight there is a problem that does not play a role of improving the heat-resistant agent, when more than 5 parts by weight increases the elongation but there is a problem that the mechanical properties are lowered.

The flame retardant is a chloroplatinic acid compound, Pt {P (CH ₃ ) ₃ } ₄ , Pt {P (C ₄ H ₉ ) ₃ } ₄ , Pt {P (OCH ₃ ) ₃ } ₄ , Pt {P (OC ₆ H ₅ ) ₃ } ₃ , Pt {P (C ₆ H ₅ ) ₃ } ₃ , Pt {P (OC ₆ H ₅ ) ₃ } ₄ , Pt {P (C ₆ H ₅ ) ₃ } ₄ , Pt {P (C ₆ H ₅ ) (C ₂ H ₅ ) ₂ } ₄ , Pt {P (OC ₆ H ₅ ) (OC ₂ H ₅ ) ₂ } ₄ , Pt {P (C ₆ H ₅ ) ₂ (OC ₂ H ₅ )} ₄ Phosphoric acid-based platinum acid compounds such as those dispersed in alcohol, isopropyl alcohol, or silicone oil may be used, and they may be prepared and used in a master batch. Specific product names include Dichloro-bis- (triphenylphoisphine) -platinum (II) of UMICORE, but is not limited thereto. The content is preferably 0.1 to 5 parts by weight based on 100 parts by weight of the silicone compound base resin. When the amount is less than 0.1 parts by weight, the effect is insignificant, and when the amount is more than 5 parts by weight, the cost may increase, and flame retardancy may be lowered.

In the present invention, when used as the component and the content range, the silicone polymer composition has a volume resistance of 0.001 ~ 2Ωcm according to ASTM D 257, flame retardancy of 0.5 to 3mm according to UL-94 V-0, 250 by ASTM D 573 It has physical properties of 0 ~-8% of tensile change and 0 ~-14% of elongation change according to the heat resistance measured under the test condition of ℃ × 72hr.

Next, the method for producing the silicone polymer composition of the present invention will be described in detail.

a) 50 to 70% by weight of at least one silicone resin selected from polymethylvinylsiloxane resin, polymethylvinylphenylsiloxane resin, 10 to 30% by weight of silicon dioxide, 1 to 10% by weight of silanediol and 1 to 1 of diphenylsilanediol. Compounding 10% by weight to prepare a silicone compound base resin;

b) kneading by adding 100 to 500 parts by weight of nickel coated graphite, based on 100 parts by weight of the silicone compound base resin;

c) adding 0.1 to 5 parts by weight of a heat resistant agent and 0.1 to 5 parts by weight of a flame retardant to the kneaded material and mixing the mixture uniformly, and then adding 1.5 to 4 parts by weight of a curing agent to prepare a silicone rubber composition;

It includes.

The present invention is characterized by preparing a silicone composition which simultaneously retains the heat resistance, conductivity, and flame retardant properties by compounding the resin first, followed by further kneading the conductive particles, and then adding and mixing the additives.

The silicone compound base resin of step a) is a polymethylvinylsiloxane resin having a weight average molecular weight of 400,000 ~ 800,000g / mol, the vinyl group content of 0.2 ~ 11 mol%; Polymethylvinylphenylsiloxane resin having a weight average molecular weight of 400,000 to 800,000 g / mol, a vinyl group content of 0.2 to 11 mol%, and 10 to 25 mol% of a methyl group content substituted with a phenyl group; Or a mixture thereof. In this case, the compounding conditions are most preferably compounded for 8 to 10 hours at 100 to 200 ° C. When the compounding time is less than 8 hours, a lot of siloxane low molecular weight materials are generated, and when used as an electronic component material, the migration (MIGRATION) may occur on the circuit board, which may affect the life of the product, and the physical properties of the silica surface are poor, so the physical properties are low. Can lose. After more than 10 hours, there is no longer any effect of reducing the low molecular weight material.

Step b) is a step of kneading by adding conductive particles to the compounded silicon compound base resin, it can be achieved by going through this kneading process. In this case, kneading is preferably performed at 60 to 70 ° C. for 15 to 20 minutes to achieve conductivity.

In addition, it is also possible to further include 50 to 90 parts by weight of carbon black, it is possible to improve the conductivity by adding carbon black.

Next step c) is a step of mixing by adding a heat-resistant agent and a flame retardant to improve the flame retardancy and heat resistance, it can be kneaded using a half-barrier mixer.

The present invention includes the step of preparing a molded product by putting the silicone rubber composition prepared by the above manufacturing method into a mold under pressure molding at 160 to 180 ° C. for 1 to 30 minutes, and the backlight unit of the liquid crystal display device manufactured by such a manufacturing method. Lampholders are also included within the scope of the present invention.

Silicone polymer composition according to the present invention has a volume resistance of 0.001 ~ 2Ωcm according to ASTM D 257, flame resistance according to UL-94 V-0 0.5 ~ 3mm, heat resistance measured under test conditions of 250 ℃ × 72hr by ASTM D 573 According to the present invention, the tensile change rate is 0 to 8% and the elongation change rate is 0 to 14%.

In addition, when manufacturing the backlight unit lamp holder of the liquid crystal display device using the silicone composition according to the present invention, the backlight unit can be manufactured by assembly without soldering process, the manufacturing process can be simplified.

In order to describe the present invention in more detail below, one example will be described, but the present invention is not limited to the following examples.

Hereinafter, physical properties were measured by the following method.

1) Conductivity (Ωcm)

Evaluated by ASTM D 257. Conductivity is represented by volume resistance.

2) Durability (%)

Evaluated by KS C 0228. Durability is expressed by the percentage change in volume resistance.

3) Heat resistance (%)

The heat resistance was measured under the test conditions of 250 ° C. × 72 hr by ASTM D 573, and the unit was tensile change rate (%) and elongation change rate (%). (For example, -8% means 8% reduction compared to the initial measurement. box)

4) Flame retardant (mm)

Evaluation was made by UL 94 V-0 (mm).

5) tensile strength, elongation

It was measured by ASTM D 412.

[Production Example 1]

Preparation of Silicone Compound Base Resin (A)

40 weight% of HR-S (S) of HRS Co., Ltd. having a weight average molecular weight of 600,000 g / mol, 0.2 mol% of vinyl group, and a molecular weight of 600,000 g / mol of 9 mol% of vinyl group 20 wt% HR-VR was mixed for 30 minutes. 30% by weight of silicon dioxide (EVONIC Corporation BET: 200 m 2 / g), 4% by weight of silanediol, and 6% by weight of diphenylsilanediol were added to the silicone gum resin composition, and then compounded at 200 ° C for 8 hours.

[Production Example 2]

Preparation of Silicone Compound Base Resin (B)

40 weight% of HR-S (S) of HRS Co., Ltd. having a weight average molecular weight of 600,000 g / mol, 0.2 mol% of vinyl group, 600,000 g / mol of weight molecular weight, and 0.3 mol% of vinyl group And 20 wt% of HR-PVT Co., Ltd., in which 20 mol% of methyl group was substituted with phenyl group, was mixed for 30 minutes. 30% by weight of silicon dioxide (EVONIC Corporation BET: 200 m 2 / g), 4% by weight of silanediol, and 6% by weight of diphenylsilanediol were added to the silicone gum resin composition, and then compounded at 200 ° C for 8 hours.

[Manufacture example 3]

Preparation of Silicone Compound Base Resin (C)

40 weight% of HR-S (S) of HRS Co., Ltd. having a weight average molecular weight of 600,000 g / mol, 0.2 mol% of vinyl group, and a weight molecular weight of 600,000 g / mol, of 9 mol% of vinyl group Mixing 10% by weight of HR-VR, HR-PVT, with 10% by weight of HR-VR, a molecular weight of 600,000g / mol, a vinyl group content of 0.3 mol%, and 20 mol% of methyl groups substituted with a phenyl group for 30 minutes It was. 30% by weight of silicon dioxide (EVONIC Corporation BET: 200 m 2 / g), 4% by weight of silanediol, and 6% by weight of diphenylsilanediol were added to the silicone gum resin composition, and then compounded at 200 ° C for 8 hours.

Example 1

100 parts by weight of the silicone compound base resin (A) prepared in Preparation Example 1 and 100 parts by weight of nickel-coated graphite (NCG-75 of Novamet Specialty Products Corporation) were added to the Banbari mixer and kneaded at 65 ° C. for 20 minutes to form a silicone polymer composition. Was prepared.

2 parts by weight of a curing agent (Tragonox-101-50D-PD of AkzoNobel Polymer Chemicals), 5 parts by weight of a heat resistant agent (RBM-9002 of XIAMETER), flame retardant (Pt {P dispersed in silicon oil with a phosphate-based platinum compound) (CH ₃ ) ₃ } ₄ , 0.5 parts by weight of Dichloro-bis- (triphenylphoisphine) -platinum (II)) of UMICORE was added and kneaded at 65 ° C. for 20 minutes to prepare a silicone polymer composition.

The prepared silicone polymer composition was press-molded at 171 ° C. for 10 minutes to prepare test specimens having a size of 130 * 130 mm. The prepared sheet was subjected to secondary vulcanization at 200 ° C. for 4 hours, and the results of measuring the physical properties by the above method are shown in Table 2.

[Example 2]

Except for using the nickel-coated graphite content in 300 parts by weight in Example 1 was prepared in the same manner as in Example 1.

The prepared silicone polymer composition was press-molded at 171 ° C. for 10 minutes to prepare test specimens having a size of 130 * 130 mm. The prepared sheet was subjected to secondary vulcanization at 200 ° C. for 4 hours, and the results of measuring the physical properties by the above method are shown in Table 2.

Example 3

Except for using the nickel-coated graphite in Example 1 in 500 parts by weight was prepared in the same manner as in Example 1.

The prepared silicone polymer composition was press-molded at 171 ° C. for 10 minutes to prepare test specimens having a size of 130 * 130 mm. The prepared sheet was subjected to secondary vulcanization at 200 ° C. for 4 hours, and the results of measuring the physical properties by the above method are shown in Table 2.

Example 4

Except for the addition of 50 parts by weight of carbon black (acetylene black of JIAOZUO CITY HEXING CHEMICAL) in Example 1 was prepared in the same manner as in Example 1.

The prepared silicone polymer composition was press-molded at 171 ° C. for 10 minutes to prepare test specimens having a size of 130 * 130 mm. The prepared sheet was subjected to secondary vulcanization at 200 ° C. for 4 hours, and the results of measuring the physical properties by the above method are shown in Table 2.

Example 5

Except that the carbon black (acetylene black of JIAOZUO CITY HEXING CHEMICAL Co., Ltd.) 70 parts by weight was added in Example 1 was prepared in the same manner as in Example 1.

The prepared silicone polymer composition was press-molded at 171 ° C. for 10 minutes to prepare test specimens having a size of 130 * 130 mm. The prepared sheet was subjected to secondary vulcanization for 4 hours at 200 ° C., and the results of measuring the physical properties by the above method are shown in Table 2.

[Example 6]

Except for the addition of 90 parts by weight of carbon black (acetylene black of JIAOZUO CITY HEXING CHEMICAL) in Example 1 was prepared in the same manner as in Example 1.

The prepared silicone polymer composition was press-molded at 171 ° C. for 10 minutes to prepare test specimens having a size of 130 * 130 mm. The prepared sheet was subjected to secondary vulcanization at 200 ° C. for 4 hours, and the results of measuring the physical properties by the above method are shown in Table 2.

Example 7

Except that carbon black (acetylene black of JIAOZUO CITY HEXING CHEMICAL Co., Ltd.) 50 parts by weight was added in Example 2 was prepared in the same manner as in Example 2.

The prepared silicone polymer composition was press-molded at 171 ° C. for 10 minutes to prepare test specimens having a size of 130 * 130 mm. The prepared sheet was subjected to secondary vulcanization at 200 ° C. for 4 hours, and the results of measuring the physical properties by the above method are shown in Table 2.

Example 8

Except for the addition of 50 parts by weight of carbon black (acetylene black of JIAOZUO CITY HEXING CHEMICAL) in Example 3 was prepared in the same manner as in Example 3.

The prepared silicone polymer composition was press-molded at 171 ° C. for 10 minutes to prepare test specimens having a size of 130 * 130 mm. The prepared sheet was subjected to secondary vulcanization at 200 ° C. for 4 hours, and the results of measuring the physical properties by the above method are shown in Table 2.

Example 9

100 parts by weight of the silicone compound base resin (B) prepared in Preparation Example 2 and 100 parts by weight of nickel-coated graphite (NCG-75 from Novamet Specialty Products Corporation) were added to the banbari mixer and kneaded at 65 ° C. for 20 minutes to form a silicone polymer composition. Was prepared.

2 parts by weight of a curing agent (Tragonox-101-50D-PD of AkzoNobel Polymer Chemicals), 5 parts by weight of a heat resistant agent (RBM-9002 of XIAMETER), flame retardant (Pt {P dispersed in silicon oil with a phosphate-based platinum compound) (CH ₃ ) ₃ } ₄ , 0.5 parts by weight of Dichloro-bis- (triphenylphoisphine) -platinum (II)) of UMICORE was added and kneaded at 65 ° C. for 20 minutes to prepare a silicone polymer composition.

The prepared silicone polymer composition was press-molded at 171 ° C. for 10 minutes to prepare test specimens having a size of 130 * 130 mm. The prepared sheet was subjected to secondary vulcanization at 200 ° C. for 4 hours, and the results of measuring the physical properties by the above method are shown in Table 2.

Example 10

Except for using the nickel-coated graphite in Example 9 in 300 parts by weight was prepared in the same manner as in Example 9.

The prepared silicone polymer composition was press-molded at 171 ° C. for 10 minutes to prepare test specimens having a size of 130 * 130 mm. The prepared sheet was subjected to secondary vulcanization at 200 ° C. for 4 hours, and the results of measuring the physical properties by the above method are shown in Table 2.

Example 11

Except for using the nickel-coated graphite in Example 9 to 500 parts by weight was prepared in the same manner as in Example 9.

The prepared silicone polymer composition was press-molded at 171 ° C. for 10 minutes to prepare test specimens having a size of 130 * 130 mm. The prepared sheet was subjected to secondary vulcanization at 200 ° C. for 4 hours, and the results of measuring the physical properties by the above method are shown in Table 2.

Example 12

Except for the addition of 50 parts by weight of carbon black (acetylene black of JIAOZUO CITY HEXING CHEMICAL) in Example 9 was prepared in the same manner as in Example 9.

The prepared silicone polymer composition was press-molded at 171 ° C. for 10 minutes to prepare test specimens having a size of 130 * 130 mm. The prepared sheet was subjected to secondary vulcanization at 200 ° C. for 4 hours, and the results of measuring the physical properties by the above method are shown in Table 2.

Example 13

Except that the carbon black (acetylene black of JIAOZUO CITY HEXING CHEMICAL Co., Ltd.) 70 parts by weight was added in Example 9 was prepared in the same manner as in Example 9.

The prepared silicone polymer composition was press-molded at 171 ° C. for 10 minutes to prepare test specimens having a size of 130 * 130 mm. The prepared sheet was subjected to secondary vulcanization at 200 ° C. for 4 hours, and the results of measuring the physical properties by the above method are shown in Table 2.

Example 14

Except for the addition of 90 parts by weight of carbon black (acetylene black of JIAOZUO CITY HEXING CHEMICAL) in Example 9 was prepared in the same manner as in Example 9.

The prepared silicone polymer composition was press-molded at 171 ° C. for 10 minutes to prepare test specimens having a size of 130 * 130 mm. The prepared sheet was subjected to secondary vulcanization at 200 ° C. for 4 hours, and the results of measuring the physical properties by the above method are shown in Table 2.

Example 15

100 parts by weight of the silicone compound base resin (C) prepared in Preparation Example 3 and 100 parts by weight of nickel-coated graphite (NCG-75 from Novamet Specialty Products Corporation) were added to the banbari mixer and kneaded at 65 ° C. for 20 minutes to form a silicone polymer composition. Was prepared.

2 parts by weight of a curing agent (Tragonox-101-50D-PD of AkzoNobel Polymer Chemicals), 5 parts by weight of a heat resistant agent (RBM-9002 of XIAMETER), flame retardant (Pt {P dispersed in silicon oil with a phosphate-based platinum compound) (CH ₃ ) ₃ } ₄ , 0.5 parts by weight of Dichloro-bis- (triphenylphoisphine) -platinum (II)) of UMICORE was added and kneaded at 65 ° C. for 20 minutes to prepare a silicone polymer composition.

The prepared silicone polymer composition was press-molded at 171 ° C. for 10 minutes to prepare test specimens having a size of 130 * 130 mm. The prepared sheet was subjected to secondary vulcanization at 200 ° C. for 4 hours, and the results of measuring the physical properties by the above method are shown in Table 2.

Example 16

Except for using the nickel-coated graphite in Example 15 to 300 parts by weight was prepared in the same manner as in Example 15.

The prepared silicone polymer composition was press-molded at 171 ° C. for 10 minutes to prepare test specimens having a size of 130 * 130 mm. The prepared sheet was subjected to secondary vulcanization at 200 ° C. for 4 hours, and the results of measuring the physical properties by the above method are shown in Table 2.

Example 17

Except for using the nickel-coated graphite in Example 15 to 500 parts by weight was prepared in the same manner as in Example 15.

The prepared silicone polymer composition was press-molded at 171 ° C. for 10 minutes to prepare test specimens having a size of 130 * 130 mm. The prepared sheet was subjected to secondary vulcanization at 200 ° C. for 4 hours, and the results of measuring the physical properties by the above method are shown in Table 2.

Example 18

Except for the addition of 50 parts by weight of carbon black (acetylene black of JIAOZUO CITY HEXING CHEMICAL) in Example 15 was prepared in the same manner as in Example 15.

The prepared silicone polymer composition was press-molded at 171 ° C. for 10 minutes to prepare test specimens having a size of 130 * 130 mm. The prepared sheet was subjected to secondary vulcanization at 200 ° C. for 4 hours, and the results of measuring the physical properties by the above method are shown in Table 2.

Example 19

A carbon black (acetylene black, manufactured by JIAOZUO CITY HEXING CHEMICAL) was added in Example 15, except that 70 parts by weight of the carbon black was added in the same manner as in Example 15.

The prepared silicone polymer composition was press-molded at 171 ° C. for 10 minutes to prepare test specimens having a size of 130 * 130 mm. The prepared sheet was subjected to secondary vulcanization at 200 ° C. for 4 hours, and the results of measuring the physical properties by the above method are shown in Table 2.

Example 20

In Example 15, the same procedure as in Example 15 was performed except that 90 parts by weight of carbon black (acetylene black of JIAOZUO CITY HEXING CHEMICAL) was further added.

The prepared silicone polymer composition was press-molded at 171 ° C. for 10 minutes to prepare test specimens having a size of 130 * 130 mm. The prepared sheet was subjected to secondary vulcanization at 200 ° C. for 4 hours, and the results of measuring the physical properties by the above method are shown in Table 2.

Comparative Example 1

It was prepared in the same manner as in Example 1 except that no nickel coated graphite was used and carbon black was used instead.

100 parts by weight of the silicone compound base resin (C) prepared in Preparation Example 1 and 100 parts by weight of carbon black (acetylene black, manufactured by JIAOZUO CITY HEXING CHEMICAL) were added to the Banbari mixer, and kneaded at 65 ° C. for 20 minutes to prepare a silicone polymer composition. .

2 parts by weight of a curing agent (Tragonox-101-50D-PD of AkzoNobel Polymer Chemicals), 5 parts by weight of a heat resistant agent (RBM-9002 of XIAMETER), flame retardant (Pt {P dispersed in silicon oil with a phosphate-based platinum compound) (CH ₃ ) ₃ } ₄ , 0.5 parts by weight of Dichloro-bis- (triphenylphoisphine) -platinum (II)) of UMICORE was added and kneaded at 65 ° C. for 20 minutes to prepare a silicone polymer composition.

The prepared silicone polymer composition was press-molded at 171 ° C. for 10 minutes to prepare test specimens having a size of 130 * 130 mm. The prepared sheet was subjected to secondary vulcanization at 200 ° C. for 4 hours, and the results of measuring the physical properties by the above method are shown in Table 2.

Comparative Example 2

Except for using 800 parts by weight of the nickel-coated graphite in Example 1 was prepared in the same manner as in Example 1.

The prepared silicone polymer composition was press-molded at 171 ° C. for 10 minutes to prepare test specimens having a size of 130 * 130 mm. The prepared sheet was subjected to secondary vulcanization at 200 ° C. for 4 hours, and the results of measuring the physical properties by the above method are shown in Table 2.

Comparative Example 3

It was prepared in the same manner as in Example 1 except for not using nickel-coated graphite and instead using carbon black and the silicon compound base resin prepared in Preparation Example 2.

100 parts by weight of the silicone compound base resin (C) prepared in Preparation Example 2 and 100 parts by weight of carbon black (acetylene black manufactured by JIAOZUO CITY HEXING CHEMICAL) were added to a short-barrier mixer and kneaded at 65 ° C. for 20 minutes to prepare a silicone polymer composition. .

2 parts by weight of a curing agent (Tragonox-101-50D-PD of AkzoNobel Polymer Chemicals), 5 parts by weight of a heat resistant agent (RBM-9002 of XIAMETER), flame retardant (Pt {P dispersed in silicon oil with a phosphate-based platinum compound) (CH ₃ ) ₃ } ₄ , 0.5 parts by weight of Dichloro-bis- (triphenylphoisphine) -platinum (II)) of UMICORE was added and kneaded at 65 ° C. for 20 minutes to prepare a silicone polymer composition.

The prepared silicone polymer composition was press-molded at 171 ° C. for 10 minutes to prepare test specimens having a size of 130 * 130 mm. The prepared sheet was subjected to secondary vulcanization at 200 ° C. for 4 hours, and the results of measuring the physical properties by the above method are shown in Table 2.

[Comparative Example 4]

In Example 2, the nickel-coated graphite was prepared in the same manner as in Example 1, except that 800 parts by weight of the silicon compound base resin prepared in Preparation Example 2 was used.

The prepared silicone polymer composition was press-molded at 171 ° C. for 10 minutes to prepare test specimens having a size of 130 * 130 mm. The prepared sheet was subjected to secondary vulcanization at 200 ° C. for 4 hours, and the results of measuring the physical properties by the above method are shown in Table 2.

[Table 1]

TABLE 2

As shown in Table 2, Examples 1 to 20 according to the present invention has a volume resistance of 0.001 to 2Ωcm according to ASTM D 257, flame retardancy of 0.5 to 3mm according to UL-94 V-0, and 250 to ASTM D 573. Tensile change rate was 0 ~ -8%, elongation change rate was 0 ~-14% according to the heat resistance measured by the test conditions of ℃ × 72hr.

Claims (15)

50 to 70% by weight of at least one silicone resin selected from polymethylvinylsiloxane resin, polymethylvinylphenylsiloxane resin, 10 to 30% by weight of silicon dioxide, 1 to 10% by weight of silanediol and 1 to 10% by weight of diphenylsilanediol Liquid crystal display including 100 to 500 parts by weight of nickel coated graphite, 1.5 to 4 parts by weight of curing agent, 0.1 to 5 parts by weight of heat resistant agent, and 0.1 to 5 parts by weight of flame retardant, based on 100 parts by weight of the silicon compound base resin including% Silicone polymer composition for a backlight unit lamp holder. The method of claim 1,
The silicone polymer composition is a silicone polymer composition for a backlight unit lamp holder of the liquid crystal display device further comprising 50 to 90 parts by weight of carbon black. The method of claim 1,
The polymethyl vinyl siloxane resin has a weight average molecular weight of 400,000 to 800,000 g / mol, and a vinyl group content of 0.2 to 11 mol%, the polymethyl vinyl phenyl siloxane resin has a weight average molecular weight of 400,000 to 800,000 g / mol mol, a vinyl group content of 0.2 to 11 mol%, 10 to 25 mol% of the methyl group content is substituted with a phenyl group silicone polymer composition for a lamp unit lamp holder of the liquid crystal display device. The method of claim 1,
The nickel coated graphite is a silicon polymer composition for a backlight unit lamp holder of the liquid crystal display device having a nickel content of 70 to 80% by weight. The method of claim 1,
The curing agent is 2,5-dimethyl-2,5-di (t-butylperoxy) hexane (2,5-Dimethyl-2,5-di (tert-butylperoxy) hexane), di- (2,4-dichloro Benzoyl) -peroxide (Di- (2,4-dichlorobenzoyl) -peroxide), dibenzoyl peroxide, Dicumyl peroxide, Di-t-butylperoxide and t-butylcumyl peroxide (t-butylcumylperoxide) using a silicone polymer composition for a backlight unit lamp holder of the liquid crystal display device using any one or more selected. The method of claim 1,
The heat resistant agent is a silicone polymer composition for a backlight unit lamp holder of a liquid crystal display device using a rare earth metal-based heat resistant agent. The method of claim 1,
The flame retardant is a silicone polymer composition for a backlight unit lamp holder of a liquid crystal display device using a chlorinated chloroplatinic acid compound or a phosphate-based platinum acid compound dispersed in alcohol, isopropyl alcohol or silicone oil. The method of claim 2,
The carbon black is a silicone polymer composition for a backlight unit lamp holder of the liquid crystal display device using acetylene black. The method of claim 1,
The silicone polymer composition has a tensile resistance of 0.001 to 2Ωcm, a flame retardance of 0.5 to 3mm according to UL-94 V-0, and a tensile resistance according to heat resistance measured at 250 ° C. × 72hr by ASTM D 573 according to ASTM D 257. A silicone polymer composition for a lamp unit lamp holder of a liquid crystal display device having a physical property having a change rate of 0 to 8% and an elongation change of 0 to 14%. A backlight unit lamp holder of a liquid crystal display device using the silicone polymer composition according to any one of claims 1 to 9. a) 50 to 70% by weight of at least one silicone resin selected from polymethylvinylsiloxane resin, polymethylvinylphenylsiloxane resin, 10 to 30% by weight of silicon dioxide, 1 to 10% by weight of silanediol and 1 to 1 of diphenylsilanediol. Compounding 10% by weight to prepare a silicone compound base resin;
b) kneading by adding 100 to 500 parts by weight of nickel coated graphite, based on 100 parts by weight of the silicone compound base resin;
c) preparing a silicone rubber composition by adding 1.5 to 4 parts by weight of a curing agent, 0.1 to 5 parts by weight of a heat resistant agent, and 0.1 to 5 parts by weight of a flame retardant to the kneaded material and mixing them uniformly;
Method of manufacturing a silicone polymer composition for a backlight unit lamp holder of the liquid crystal display device comprising a. 12. The method of claim 11,
The silicone compound base resin of step a) is a polymethylvinylsiloxane resin having a weight average molecular weight of 400,000 ~ 800,000g / mol, the vinyl group content of 0.2 ~ 11 mol%; Polymethylvinylphenylsiloxane resin having a weight average molecular weight of 400,000 to 800,000 g / mol, a vinyl group content of 0.2 to 11 mol%, and 10 to 25% of a methyl group content substituted with a phenyl group; Or compounding a mixture thereof. A method of manufacturing a silicone polymer composition for a backlight unit lamp holder of a liquid crystal display device. 12. The method of claim 11,
The method of manufacturing a silicone polymer composition for a backlight unit lamp holder of the liquid crystal display device further comprising 50 to 90 parts by weight of carbon black in step b). A method of manufacturing a backlight unit lamp holder of a liquid crystal display device, comprising the step of putting a silicone polymer composition prepared by the method of any one of claims 11 to 13 into a mold and forming a molded product by press molding. The backlight unit lamp holder of the liquid crystal display device manufactured by the manufacturing method of claim 14.