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Insulation silicon rubber compound

A silicone rubber composition and insulating technology, applied in the field of thermosetting silicone rubber compositions, can solve the problems of difficulty in maintaining electrical insulation, inability to apply wire coating and remote control input devices, etc., and achieve excellent anti-static properties and excellent Antistatic effect

Active Publication Date: 2011-06-08
SHIN ETSU CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When using carbon black, there is a problem that it is difficult to maintain electrical insulation, or it is limited to black
In addition, JP-A-2003-82232 (Patent Document 4) proposes a silicone rubber composition for a semiconductive roller to which a lithium salt is added, but in the semiconductive region, there are some materials that cannot be used unless it is an insulating material. Covering of wires and remote control input devices (キ一パツド) etc.

Method used

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  • Insulation silicon rubber compound
  • Insulation silicon rubber compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Added organopolysiloxane with an average degree of polymerization of about 6000, consisting of 99.825 mol% of dimethylsiloxane units, 0.15 mol% of methylvinylsiloxane units, and 0.025 mol% of dimethylvinylsiloxane units 100 parts by mass of oxane, BET specific surface area is 200m 2 45 parts by mass of fumed silica (Aerosil 200, manufactured by Japan Aerosil Co., Ltd.) per g, which has silanol groups at both ends as a dispersant, an average degree of polymerization of 15, and a viscosity of 30 cs at 25° C. 10 parts by mass of methylpolysiloxane was kneaded with a kneader, and heat-treated at 170° C. for 2 hours to prepare a composition.

[0068] With respect to 100 parts by mass of the composition, add 0.05 parts by mass of antistatic agent paste 1 and 0.4 parts by mass of 2,5-dimethylbis(tert-butylperoxy)hexane as a crosslinking agent, and use a double roller to uniformly After mixing, at 165°C, 70kgf / cm 2 Pre-cure for 10 minutes under the same conditions to make a 2...

Embodiment 2

[0072] Except having changed the addition amount of the antistatic agent paste 1 into 0.01 mass part, it carried out similarly to Example 1, and measured the charge amount and volume resistance.

[0073] The results are shown in Table 1.

Embodiment 3

[0075] The diorganosiloxane unit in the main chain of the molecular chain contains 10 mol% of methylvinylsiloxane units and 90 mol% of dimethylsiloxane units, and the two ends of the molecular chain with a viscosity of 500mPa·s use trimethyl Siloxane-terminated dimethylsiloxane-methylvinylsiloxane copolymer 100 parts by mass, specific surface area 110m 25 parts by mass of hydrophobized fumed silica (R-972, manufactured by Japan Aerosil Co., Ltd.), 38 parts by mass of crystalline silica (Crystallight VX-S, manufactured by Longsen Co., Ltd.) Parts by mass, a dimethylsiloxane-methylhydridosiloxane copolymer having a SiH group at both ends of the molecular chain and a non-terminal of the molecular chain with a viscosity of 9 mPa·s (hydrogen atoms bonded to silicon atoms: 0.51 mass %) 1.5 parts by mass, 0.03 parts of 1-ethynyl cyclohexanol, the coordination compound of chloroplatinic acid and divinyltetramethyldisiloxane is converted into the mass of platinum metal, and trimethylsi...

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Abstract

The present invention relates to an insulative silicone rubber composition with excellent antistatic properties, comprising 100 parts by mass of a thermosetting silicone rubber composition and 0.0001-5 parts by mass of an ionic conductive antistatic agent such as one or more kinds of lithium salts selected from LiBF4, LiCLO4, LiPF6, LiAsF6, LiSbF6, LiSO3CF3, LiN(SO2CF3)2, LiSO3C4F9, LiC(SO2CF3) 3 and LiB(C6H5) 4. The present invention is aimed to obtain an insulative silicone rubber composition that becomes a silicone rubber maintaining insulation properties, excellent antistatic properties and maintaining antistatic properties even being exposed to a high temperature.

Description

technical field [0001] The present invention relates to a heat-curable silicone rubber composition, particularly an insulating silicone rubber composition having sufficient antistatic properties not only at room temperature but also at high temperatures. Background technique [0002] Silicone rubber is widely used in various fields such as electronic instruments, automobiles, construction, medical treatment, and food due to its excellent weather resistance, electrical properties, low compression set, heat resistance, and cold resistance. . Examples include button pads used as rubber contacts for remote controls, typewriters, word processors, computer terminals, musical instruments, etc.; gaskets for construction; anti-vibration rubber for audio equipment, etc.; connector gaskets, spark plug protection covers (Space Platg Bur) and other automotive parts, packaging for micro-discs used in computers, molds for bread and confectionery, etc. Nowadays, the demand for silicone ru...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/04C08K3/24C08K5/56
CPCC08K3/10C08K3/36C08K2201/017C08L83/04C08L2201/02C08L2201/06C08L2205/02
Inventor 轰大地廻谷典行中村勉
Owner SHIN ETSU CHEM CO LTD