KR101196192B1 - Silicon composition for back light unit side cushion rubber of liquid crystal display - Google Patents

Abstract

The present invention relates to a silicone polymer composition that acts as a sealing and cushioning buffer between a BLU mold frame and a prism sheet of a liquid crystal display. More specifically, the present invention relates to a multifunctional silicone polymer composition provided with both conductivity and flame retardancy.

Description

Silicone polymer composition for backlight unit buffer spacer base material of liquid crystal display device {SILICON COMPOSITION FOR BACK LIGHT UNIT SIDE CUSHION RUBBER OF LIQUID CRYSTAL DISPLAY}

The present invention is a multifunctional silicone that simultaneously provides conductivity, durability, and flame retardancy to a silicone sheet serving as a sealing and cushion buffer between a BLU (Back Light Unit) mold frame of a liquid crystal display and a prism sheet. It relates to a polymer composition.

The recent trend in the LCD industry is the growing size of LCDs in response to growing demand for large TVs. To this end, it is essential to improve the performance of parts and materials, and to ensure stable supply and demand through efficient supply of products through the development of new materials. Among the components used for the functional control of LCDs currently used, silicon component materials are the most important core component materials for LCDs, and since most of them are imported from overseas, the demand for localization is urgent.

Liquid crystal displays (LCDs) display images by using electrical and optical characteristics of liquid crystals. Liquid crystal display devices are thinner and lighter than other display devices, and are used throughout the industry because they have advantages of low power consumption and low driving voltage.

In order to seal the BLU mold frame and prism sheet, the conventional silicon sheet had difficulty in producing a large sheet and a complicated manufacturing process requiring a primer and an adhesive treatment. In addition, since there is no charge prevention as an insulator, when a spacer is bonded to a mold frame, foreign matters are mixed in the process, thereby causing a problem in the PCB circuit.

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

In addition, an object of the present invention is to provide a more environmentally friendly multifunctional silicone polymer composition than the material to which the peroxide is applied in case of fire by the addition of a chloroplatinic acid compound as a flame retardant.

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 0.1 to 10 parts by weight of carbon black, 0.1 to 10 parts by weight of ionic liquid, 1 to 10 parts by weight of curing agent, 0.1 to 5 parts by weight of flame retardant, and quartz powder It relates to a silicone polymer composition for a backlight unit buffer spacer substrate of a liquid crystal display device containing 30 to 50 parts by weight.

The present invention may further include 100 to 500 parts by weight of nickel-coated graphite having a nickel content of 70 to 80% by weight as needed.

In addition, the inorganic pigment may further comprise 10 to 30 parts by weight.

Method for producing a silicone polymer composition for a backlight unit buffer spacer base material 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. Preparing a silicone compound base resin comprising 10 wt%;

b) kneading with 0.1 to 10 parts by weight of carbon black based on 100 parts by weight of the silicone compound base resin;

c) 0.1 to 10 parts by weight of an ionic liquid, 0.1 to 5 parts by weight of a flame retardant, 30 to 50 parts by weight of a quartz powder are mixed and uniformly mixed, and then 1 to 10 parts by weight of a curing agent is prepared to prepare a silicone rubber composition. Making;

It includes.

The present inventors are characterized in providing a new silicone composite material having properties of durability, 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, by using a liquid ionic liquid at room temperature in the silicone composition, the conductivity is improved, so that the inflow of dust and the like can be blocked when applied as a spacer substrate in the PCB circuit by incorporation of foreign matter such as dust during backlight unit manufacturing. We found that we could solve the problem that caused the disorder.

In addition, it is more eco-friendly than the material applied with peroxide in case of fire by the addition of chloroplatinic acid compound as a flame retardant, and the flame retardancy is further improved by using a mixture of quartz powder and iron oxide, and synergistic effect when using a mixture of carbon black and ionic liquid The present invention has been found to provide a silicone composition capable of using less carbon black.

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 further includes silicon dioxide, silanediol, and diphenylsilanediol for mechanical properties. It can improve more. In the present invention, by adding a silicon dioxide or silanediol to the silicone resin or the silicone resin in advance to compounding, mechanical properties 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%, mechanical properties (tension, tear) are lowered, and if the vinyl group content is more than 11 mol%, the hardness is high, 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.

The diphenylsilane diol is used to achieve durability, 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 carbon black is used to impart conductivity, and as the carbon black, acetylene black is less expensive among acetylene black, channel black, and thermal black, and the structure of carbon is relatively high, so that fine pores are developed and the conductivity is high. It is preferable because it improves. 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 merge, and if it is more than 20 minutes, adhesion occurs due to strong shear force. In this case, the content is preferably 0.1 to 10 parts by weight based on 100 parts by weight of the silicone compound base resin.

In addition, synergistic effects may be expressed by further mixing nickel coated graphite on the carbon black as needed. 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 nickel coated graphite is used to impart conductivity, and in particular, when nickel is coated with a content of 70 to 80% by weight, it is preferable because the conductivity is very excellent. Specific product names include Sulzer METCO (CANADA) E-FILL ^™ 2801 graphite coated with 75 wt% nickel. 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.

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 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, the ionic liquid is used to further improve the conductivity, and specifically, for example, 1-ethyl-3-methylimidazolium methylsulfonate, 1-ethyl-3-methylimidazolium dicyania Mead, 1-ethyl-3-methylimidazolium ethyl sulfate, 1-ethyl-3-methylimidazolium thiocyanate, 1-ethyl-3-methylimidazolium tetrafluoroborate, 1-ethyl-3- Methylimidazolium hexafluorophosphate, 1-ethyl-3-methylimidazolium diethylphosphate, 1-ethyl-3-methylimidazolium bromide, 1-ethyl-3-methylimidazolium p-toluenesulfonate , 1-butyl-3-methylimidazolium methanesulfonate, 1-butyl-3-methylimidazolium dicyanamide, 1-butyl-3-methylimidazolium ethyl sulfate, 1-butyl-3-methyldi Midazolium thiocyanate, 1-butyl-3-methylimidazolium dimethylphosphate, 1-butyl-3-methylimidazolium bromide, 1- One selected from the group consisting of butyl-3-methylimidazolium p-toluenesulfonate, 1-butyl-3-methylimidazolium tetrafluoroborate and 1-butyl-3-methylimidazolium hexafluorophosphate Can be used. It is preferable to use the content of 0.1 to 10 parts by weight, the use of less than 0.1 parts by weight is insignificant, when using more than 10 parts by weight can not see any further effect.

In the present invention, the quartz powder is used to improve the flame retardancy, it is preferable to use 30 to 50 parts by weight, the use of less than 30 parts by weight of the flame retardancy improving effect, when used in excess of 50 parts by weight Mechanical properties (tension, height) are inferior.

In the present invention, the inorganic pigment is preferably included in the range of 10 to 30 parts by weight can be improved flame retardancy, less than 10 parts by weight, the effect of improving the flame retardancy is insignificant, if more than 30 parts by weight may cause curing failure is not preferred Can not do it. Specifically, black iron oxide or the like can be used.

In the present invention, when used as the component and the content range, the silicone polymer composition has a volume resistivity of 10 ¹⁰ to 10 ¹² μm by ASTM D 257, durability of 95 to 100% by KS C 0228, UL 94 V-0 Flame retardancy by 0.5 ~ 3.0mm has physical properties.

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. Preparing a silicone compound base resin comprising 10 wt%;

b) kneading with 0.1 to 10 parts by weight of carbon black based on 100 parts by weight of the silicone compound base resin;

c) 0.1 to 10 parts by weight of an ionic liquid, 0.1 to 5 parts by weight of a flame retardant, 30 to 50 parts by weight of a quartz powder are mixed and uniformly mixed, and then 1 to 10 parts by weight of a curing agent is prepared to prepare a silicone rubber composition. Making;

It includes.

The present invention is characterized in producing a silicone composition which simultaneously retains flame retardancy and conductivity 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%; At least one silicone selected from 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 a methyl group content of 10 to 25 mol% substituted with a phenyl group; 50 to 70% by weight of resin, 10 to 30% by weight of silicon dioxide, 1 to 10% by weight of silanediol and 1 to 10% by weight of diphenylsilanediol are compounded. In this case, compounding conditions may improve extrusion workability and durability by compounding for 5 to 10 hours at 100 ~ 200 ℃.

The step b) is a step of kneading by adding carbon black as conductive particles to the compounded silicon compound base resin, and through this kneading process, it is possible to prepare a resin composition imparted with conductivity. At this time, kneading is preferably performed at 60 to 70 ° C for 15 to 20 minutes, since the conductivity can be further improved.

Next, the step c) is a step of mixing by adding a flame retardant and a curing agent in order to improve durability, flame retardancy and conductivity, by kneading at 60 ~ 70 ℃, for 15 to 20 minutes using a half-barrier mixer, etc. To prepare.

The silicone polymer composition according to the present invention has a volume resistivity of 10 ¹⁰ to 10 ¹² μm by ASTM D 257, durability of 95 to 100% by KS C 0228, and flame resistance of 0.5 to 3.0 mm by UL-94-V ₀ . It has physical properties.

In addition, since the antistatic performance is excellent when the backlight unit mold frame and the spacer are bonded to the liquid crystal display device using the silicone composition according to the present invention, it is possible to solve the problem of PCB circuit failure caused by dust.

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.

The following physical properties were measured by the following methods.

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) Flame retardant (mm)

It was evaluated by the UL-94-V _0.

[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 , 20% by weight of SE-52 of MPM, in which 20 mol% of the methyl group was substituted with a 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.

[Production 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 10 wt% of HR-VR and 10 wt% of SE-52 having a molecular weight of 600,000 g / mol, a vinyl group content of 0.3 mol%, and 20 mol% of a methyl group substituted with a phenyl group were 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.

Example 1

5 parts by weight of carbon black (EVONIC, XE-2B) was added to 100 parts by weight of the silicone compound base resin (A) prepared in Preparation Example 1, and kneaded at 65 ° C. for 20 minutes to prepare a kneaded product. .

0.5 parts by weight of an ionic liquid (1-butyl-3-methylimidazolium salt, Sino-Japanese Chemical Co., Ltd., JISTAT 1000), 1.6 parts by weight of a curing agent (Trigonox-101-50D-PD from AkzoNobel Polymer Chemicals), a flame retardant (Pt {P (CH ₃ ) ₃ } ₄ dispersed in silicon oil as a phosphate-based platinum compound, UMICORE, Dichloro-bis- (triphenylphoisphine) -platinum (II)) 0.5 part by weight, quartz powder (CAS No: 14808 -60-7, USA SILICATKDML MIN-U-SIL 5) 30 parts by weight and 10 parts by weight of pigment (black iron oxide, LANXESS, Bayferrox 318C) were added and mixed to prepare a silicone polymer composition in a half-barrier mixer at 50 ° C. It was.

The prepared silicone polymer composition was press-molded at 116 ° 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]

A quartz powder (CAS No: 14808-60-7, US SILICATKDML MIN-U-SIL 5) was prepared in the same manner as in Example 1, except that 50 parts by weight was used.

The prepared silicone polymer composition was press-molded at 116 ° 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]

In Example 1, 100 parts by weight of nickel-coated graphite (Sulzer METCO (CANADA) E-FILL ^™ 2801) was further added, and quartz powder (CAS No: 14808-60-7, US SILICATKDML MIN-U-SIL 5) was added. It was prepared in the same manner as in Example 1 except for using 40 parts by weight.

The prepared silicone polymer composition was press-molded at 116 ° 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

In preparing the kneaded product in Example 1, except that the silicone compound base resin (B) prepared in Preparation Example 2 was used in the same manner as in Example 1.

The prepared silicone polymer composition was press-molded at 116 ° 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 for using quartz powder (CAS No: 14808-60-7, US SILICATKDML MIN-U-SIL 5) in 50 parts by weight in Example 4 was prepared in the same manner as in Example 4.

The prepared silicone polymer composition was press-molded at 116 ° 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 6]

Nickel-coated graphite (Sulzer METCO (CANADA) E-FILL ^TM 2801) in Example 4 was prepared in the same manner as in Example 4, except that 100 parts by weight of quartz powder was added to 40 parts by weight.

The prepared silicone polymer composition was press-molded at 116 ° 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]

When preparing the kneaded product in Example 1, except that the silicone compound base resin (C) prepared in Preparation Example 3 was used in the same manner as in Example 1.

The prepared silicone polymer composition was press-molded at 116 ° 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 using a quartz powder (CAS No: 14808-60-7, US SILICATKDML MIN-U-SIL 5) in 50 parts by weight in Example 7 was prepared in the same manner as in Example 7.

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]

Except for the addition of 100 parts by weight of nickel coated graphite (Sulzer METCO (CANADA) E-FILL ^TM 2801) in Example 7, quartz powder (CAS No: 14808-60-7, US SILICATKDML MIN-U- It was prepared in the same manner as in Example 7, except that SIL 5) was used at 40 parts by weight.

The prepared silicone polymer composition was press-molded at 116 ° 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

Except not using the ionic liquid in Example 1, except that the quartz powder (CAS No: 14808-60-7, US SILICATKDML MIN-U-SIL 5) to 30 parts by weight, pigment 5 parts by weight And prepared in the same manner as in Example 1.

The prepared silicone polymer composition was press-molded at 116 ° 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 not using a flame retardant and pigment in Example 1, it was prepared in the same manner as in Example 1.

The prepared silicone polymer composition was press-molded at 116 ° 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] (In Table 1, the content is parts by weight)

[Table 2]

As shown in the table, the embodiment according to the present invention was found to have a volume resistance of 10 ¹⁰ to 10 ¹² Ωcm, durability of 95 to 100%, and flame retardancy of 0.5 to 3.0 mm.

Claims (13)

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 0.1 to 10 parts by weight of carbon black, 0.1 to 10 parts by weight of ionic liquid, 1 to 10 parts by weight of hardener, 0.1 to 5 parts by weight of flame retardant, and 30 to 50 parts of quartz powder Silicone polymer composition for a backlight unit buffer spacer base material of the liquid crystal display device comprising a weight part. The method of claim 1,
The composition is a silicone polymer composition for a backlight unit buffer spacer base material of the liquid crystal display device further comprises 100 to 500 parts by weight of nickel coated graphite having a nickel content of 70 to 80% by weight. The method of claim 1,
The composition is a silicone polymer composition for a backlight unit buffer spacer base material of the liquid crystal display device further comprising 10 to 30 parts by weight of an inorganic pigment. The method of claim 1,
The ionic liquid is 1-ethyl-3-methylimidazolium methylsulfonate, 1-ethyl-3-methylimidazolium dicyanamide, 1-ethyl-3-methylimidazolium ethyl sulfate, 1-ethyl- 3-methylimidazolium thiocyanate, 1-ethyl-3-methylimidazolium tetrafluoroborate, 1-ethyl-3-methylimidazolium hexafluorophosphate, 1-ethyl-3-methylimidazolium Diethylphosphate, 1-ethyl-3-methylimidazolium bromide, 1-ethyl-3-methylimidazolium p-toluenesulfonate, 1-butyl-3-methylimidazolium methanesulfonate, 1-butyl- 3-methylimidazolium dicyanamide, 1-butyl-3-methylimidazolium ethylsulfate, 1-butyl-3-methylimidazolium thiocyanate, 1-butyl-3-methylimidazolium dimethylphosphate, 1-butyl-3-methylimidazolium bromide, 1-butyl-3-methylimidazolium p-toluenesulfonate, 1-butyl-3-methylimidazolium tetrafluorobore Bit and 1-butyl-3-methylimidazolium hexafluoro backlight unit cushioning spacer of a liquid crystal display device which is selected from the group consisting of fluoro-phosphate base silicone polymer composition. 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 Mole, a vinyl group content of 0.2 to 11 mol%, 10 to 25 mol% of the methyl group content of the silicone polymer composition for a backlight unit buffer spacer base material of the liquid crystal display device using a phenyl group substituted. 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 buffer spacer base material of the liquid crystal display device using any one or more selected from. The method of claim 1,
The flame retardant is a silicone polymer composition for a backlight unit buffer spacer base material 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 1,
The carbon black is a silicone polymer composition for a backlight unit buffer spacer base material of a liquid crystal display device using acetylene black. The method of claim 1,
The silicone polymer composition has physical properties of volume resistivity according to ASTM D 257 of 10 ¹⁰ to 10 ¹² Ωcm, durability of KS C 0228 to 95 to 100%, and flame retardancy of UL-94-V ₀ to 0.5 to 3.0 mm. Silicone polymer composition for a backlight unit buffer spacer substrate of a liquid crystal display device. A buffer spacer 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. Preparing a silicone compound base resin comprising 10 wt%;
b) kneading with 0.1 to 10 parts by weight of carbon black based on 100 parts by weight of the silicone compound base resin;
c) 0.1 to 10 parts by weight of an ionic liquid, 0.1 to 5 parts by weight of a flame retardant, 30 to 50 parts by weight of a quartz powder are mixed and uniformly mixed, and then 1 to 10 parts by weight of a curing agent is prepared to prepare a silicone rubber composition. Making;
Method of manufacturing a silicone polymer composition for a backlight unit buffer spacer substrate of the liquid crystal display device comprising a. 12. The method of claim 11,
In step a), the polymethylvinylsiloxane 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%, and the polymethylvinylphenylsiloxane resin has a weight average molecular weight 400,000 to 800,000 g / mol, a vinyl group content of 0.2 to 11 mol%, 10 to 25% of the methyl group content is substituted with a phenyl group of the method for producing a silicone polymer composition for a backlight unit buffer spacer substrate of the liquid crystal display device . 12. The method of claim 11,
The method of manufacturing a silicone polymer composition for a backlight unit buffer spacer substrate of the liquid crystal display device further comprises 100 to 500 parts by weight of nickel-coated graphite having a nickel content of 70 to 80% by weight in step b).