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WO2017199845A1 - Silicone rubber composition for waterproofing, silicone rubber moulded body for waterproofing, and wire harness - Google Patents

Silicone rubber composition for waterproofing, silicone rubber moulded body for waterproofing, and wire harness Download PDF

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Publication number
WO2017199845A1
WO2017199845A1 PCT/JP2017/017863 JP2017017863W WO2017199845A1 WO 2017199845 A1 WO2017199845 A1 WO 2017199845A1 JP 2017017863 W JP2017017863 W JP 2017017863W WO 2017199845 A1 WO2017199845 A1 WO 2017199845A1
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WIPO (PCT)
Prior art keywords
silicone rubber
wire harness
water
waterproofing
rubber composition
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Ceased
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PCT/JP2017/017863
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French (fr)
Japanese (ja)
Inventor
隆彰 濱口
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Sumitomo Wiring Systems Ltd
AutoNetworks Technologies Ltd
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Wiring Systems Ltd
AutoNetworks Technologies Ltd
Sumitomo Electric Industries Ltd
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Publication of WO2017199845A1 publication Critical patent/WO2017199845A1/en
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Ceased legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K3/00—Materials not provided for elsewhere
    • C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
    • H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables

Definitions

  • the present invention relates to a water-stopping silicone rubber composition, a water-stopping silicone rubber molding, and a wire harness, and more specifically, a water-stopping silicone rubber composition used for a water-stopping portion of a wire harness, and a water-stopping silicone rubber.
  • the present invention relates to a molded body and a wire harness.
  • wire harnesses for automobiles may come in contact with water such as rainwater. For this reason, in this kind of wire harness, a water stop process may be performed in an electric wire terminal, between electric wires, the inside of a housing, etc.
  • the problem to be solved by the present invention is to provide a water-stopping silicone rubber composition, a water-stopping silicone rubber molded product, and a wire harness that can maintain water-stopping performance even when bending or bending occurs.
  • a silicone rubber composition for water stop is a silicone rubber composition for water stop used for a water stop portion of a wire harness, and includes a platinum catalyst and a thermosetting silicone rubber.
  • the gist is that the Shore A hardness after curing is 25 or less and the breaking strength after curing is 5.0 MPa or more.
  • a sulfur-based compound is included together with the platinum catalyst and the thermosetting silicone rubber.
  • the content of the sulfur compound is preferably in the range of 0.08 to 1.0 part by mass with respect to 100 parts by mass of the thermosetting silicone rubber.
  • the gist of the silicone rubber molded body for water stop according to the present invention consists of a cured product of the above-mentioned silicone rubber composition for water stop.
  • the gist of the wire harness according to the present invention is that the above-mentioned silicone rubber molded body for water stop is disposed in the water stop portion of the wire harness.
  • the water-stop silicone rubber composition according to the present invention includes a platinum catalyst and a thermosetting silicone rubber, and has a Shore A hardness of 25 or less after curing and a breaking strength after curing of 5.0 MPa or more.
  • the water-stop performance can be maintained even if bending or bending occurs.
  • the silicone rubber molded body for water stop according to the present invention and the wire harness according to the present invention using the same water stop performance can be maintained even if bending or bending occurs.
  • the silicone rubber composition for water stop according to the present invention (hereinafter sometimes referred to as the present composition) is a silicone rubber composition for water stop used for a water stop portion of a wire harness, and includes a platinum catalyst and thermosetting. Including silicone rubber, the Shore A hardness after curing is 25 or less, and the breaking strength after curing is 5.0 MPa or more.
  • the thermosetting silicone rubber is an addition reaction type (addition curing type) silicone rubber, and includes an alkenyl group-containing organopolysiloxane as a main component and a hydrosilyl group-containing organopolysiloxane as a curing agent.
  • the platinum catalyst is a crosslinking catalyst for thermosetting silicone rubber.
  • the alkenyl group include a vinyl group, an allyl group, a butenyl group, and a pentenyl group.
  • the organopolysiloxane has a polysiloxane chain (—Si—O—Si—O—) as a main chain and has an organic group on Si. Examples of the organic group of the organopolysiloxane include a methyl group, an ethyl group, and a phenyl group.
  • This composition is excellent in flexibility because the Shore A hardness after curing is 25 or less, and even when bending or bending occurs when used in the water-stop part of the wire harness, the water-stop part has cracks or gaps. The occurrence of such defects can be suppressed. Thereby, water stop performance can be maintained.
  • Shore A hardness is measured according to JIS K6253.
  • the Shore A hardness after curing is more preferably 23 or less, and even more preferably 20 or less.
  • the Shore A hardness after curing is preferably 15 or more from the viewpoint of ensuring strength. More preferably, it is 18 or more. By securing an appropriate strength, it is possible to suppress the occurrence of defects such as cracks and gaps in the water stop portion even when bending or bending occurs when used in the water stop portion of the wire harness.
  • this composition has a breaking strength after curing of 5.0 MPa or more, so that even when bending or bending occurs when used in the water-stop part of the wire harness, the water-stop part has cracks or gaps. It is possible to suppress the occurrence of defects.
  • the breaking strength is measured according to JIS K6252.
  • the breaking strength after curing is preferably 5.3 MPa or more, more preferably 7.0 MPa or more, and further preferably 7.5 MPa or more. Further, the breaking strength after curing is preferably 10.5 MPa or less. When the breaking strength after curing is 10.5 MPa or less, it is easy to ensure flexibility.
  • the breaking strength after curing is more preferably 10.1 MPa or less, and still more preferably 9.5 MPa or less.
  • the Shore A hardness after curing and the breaking strength after curing are affected by the composition of the thermosetting silicone rubber, etc., but only by adjusting the blend ratio of the main component and the curing agent, the Shore A hardness after curing Is difficult to reduce to the above range.
  • the Shore A hardness after curing is made lower than that of ordinary thermosetting silicone rubber by a method of reducing the crosslinking point of the silicone rubber by reducing the activity of the platinum catalyst. Along with this, the breaking strength after curing is also lowered.
  • Examples of a method for reducing the crosslinking point of the silicone rubber by reducing the activity of the platinum catalyst include blending a sulfur compound with the platinum catalyst and the thermosetting silicone rubber.
  • a sulfur compound is usually a catalyst poison of a platinum catalyst, and adding a sulfur compound in a thermosetting silicone rubber that is thermally cured using a platinum catalyst is avoided.
  • a sulfur-based compound is blended.
  • the sulfur-based compound is not particularly limited, but a thiol compound having an SH group at the terminal is preferable from the viewpoint of reducing the activity of the platinum catalyst and easily reducing the crosslinking point of the silicone rubber.
  • the thiol compound may be monofunctional or polyfunctional.
  • the polyfunctional one is a compound having a plurality of SH groups in one molecule, and the monofunctional one is a compound having one SH group in one molecule.
  • the content of the sulfur compound is preferably in the range of 0.08 to 1.0 part by mass with respect to 100 parts by mass of the thermosetting silicone rubber. More preferably, it is in the range of 0.5 to 1.0 part by mass.
  • the content of the sulfur compound is relatively increased, the effect of reducing the activity of the platinum catalyst and reducing the crosslinking point of the silicone rubber is improved, and the flexibility is improved.
  • the content of the sulfur compound is relatively reduced, a crosslinking point is secured and the strength is improved.
  • the composition preferably has an elongation at break of 650% or more as a physical property after curing. More preferably, it is 700% or more. Further, it is preferable that the crosslink density is less than 4.0 ⁇ 10 -4 mol / cc. Further, from the viewpoint of strength, it is preferable that the elongation at break is 900% or less as a physical property after curing.
  • the crosslink density is preferably 2.0 ⁇ 10 ⁇ 4 mol / cc or more.
  • the elongation at break is measured according to JIS K6252.
  • the crosslinking density can be calculated from the measurement result of dynamic viscoelasticity.
  • the composition is preferably in a liquid state at room temperature because it can be easily applied to a desired position and flexibility can be easily obtained.
  • the silicone rubber molded body for water-stopping according to the present invention (hereinafter sometimes referred to as the present molded body) obtained using the present composition comprises a cured product of the present composition.
  • This molded object is a molded object used for the water stop part of a wire harness, and the molded object obtained by arrange
  • a molded body placed in the water stop portion of the wire harness may be used. Examples of the latter molded body include a rubber plug that has been molded into a cylindrical shape in advance.
  • the water stop treatment is performed on the water stop portion of the wire harness using the composition and the molded body.
  • the wire harness which concerns on this invention consists of this molded object arrange
  • the wire harness has at least one insulated wire.
  • the insulated wire has a conductor and a covering material that covers the outer periphery of the conductor.
  • a connection terminal is connected by an electric wire terminal.
  • it is accommodated in a housing (connector housing) at a wire end.
  • FIG. 1 shows a wire harness according to an embodiment of the present invention in which a wire terminal is subjected to a water stop treatment.
  • FIG. 2 what gave the water stop process between electric wires as a wire harness which concerns on one Embodiment of this invention is shown.
  • FIG. 3 shows a wire harness according to an embodiment of the present invention that has been subjected to a water stop treatment in the housing.
  • the insulated wire 10 included in the wire harness has the conductor 12 partially exposed by peeling the covering material 14 at the end of the wire.
  • a terminal fitting 16 is connected to the end of the exposed conductor 12. Since the conductor 12 is partially exposed at the end of the wire, water may enter the inside of the wire from between the covering material 14 and the conductor 12.
  • the water stop treatment is performed by arranging and curing the present composition so as to block between the exposed conductor 12 and the covering material 14 in the electric wire terminal.
  • the silicone rubber molding 15 for water stop is arrange
  • the wire harness includes a plurality of insulated wires 10 and 11.
  • a wire harness arranged at a place where there is a possibility of being exposed to water water may enter from between the covering materials 14 and 14 of the plurality of insulated wires 10 and 11. Therefore, in FIG. 2, the water-stopping treatment is performed by arranging and curing the present composition so as to block between the covering materials 14 and 14 of the plurality of insulated wires 10 and 11. Thereby, the silicone rubber molding 15 for water stop is arrange
  • the insulated wire 10 included in the wire harness is accommodated in a housing (connector housing) 17 at the end of the wire.
  • a housing connector housing 17
  • water may enter from between the insulated wire 10 and the housing 17. Therefore, in FIG. 3, the water-stopping treatment is performed by arranging and curing the present composition so as to block the space between the insulated wire 10 and the housing 17.
  • the silicone rubber molding 15 for water stop is arrange
  • the material of the insulating wire covering material 14 is not particularly limited, and may be an insulating resin material or the like.
  • the insulating resin material include vinyl chloride resin, olefin resin, and silicone rubber.
  • the insulating resin material may contain an additive added to the coating material. Examples of the additive include a flame retardant and an antioxidant.
  • the conductor 12 may be composed of a single wire or a plurality of strands.
  • the single wire or the plurality of strands is composed of one or more selected from metal strands and organic fibers.
  • metal strand copper, copper alloy, aluminum, aluminum alloy, etc., which are excellent in conductivity are used. Further, stainless steel or the like may be used as the reinforcing wire (tension member).
  • organic fiber conductive organic fiber or non-conductive organic fiber is used as the organic fiber.
  • the conductive organic fiber may be a conductive fiber containing a conductive filler inside the fiber, or may be a conductive fiber in which a metal layer is coated on the outer periphery of the organic fiber.
  • the non-conductive organic fiber is preferably used as a reinforcing wire (tension member).
  • the plurality of strands may be twisted to form a twisted wire, or may not be twisted.
  • thermosetting silicone rubber containing a platinum catalyst and a sulfur compound were blended with the blending composition (parts by mass) shown in Table 1, and mixed in a mixer at room temperature for 60 minutes in the air. Thereby, a silicone rubber composition was obtained.
  • the obtained silicone rubber composition was press-molded in a press frame for 1 minute under the conditions of 180 ° C. and 10 MPa to prepare a plate-shaped (200 mm ⁇ 200 mm ⁇ 2 mm) cured silicone rubber.
  • thermosetting silicone rubber was blended with the blending composition (parts by mass) shown in Table 1, and mixed in the atmosphere at room temperature for 60 minutes with a mixer. Thereby, a silicone rubber composition was obtained. A sulfur-based compound was not blended.
  • Preparation of cured silicone rubber A cured silicone rubber was prepared in the same manner as in the examples.
  • Water stop treatment of the wire terminal The water stop process of the electric wire terminal was performed similarly to the Example.
  • Air leak test As shown in FIG. 4, the rubber tube 3 is inserted into the end portion of the insulated wire 1 whose water terminal is water-stopped with the cured silicone rubber 2, and the entire insulated wire 1 is placed in the water tank 4. Air pressure was applied from the rubber tube 3 in a state where the conductor 5 was bent in the direction of the arrow so that a force was applied. If there was no air leak from the water stop section 6 while the air pressure of 200 kPa was being applied for 30 seconds, the water stop performance was evaluated as “ ⁇ ”, and if there was air leak, it was evaluated as “No”. . In addition, when there was no air leakage from the water stop portion 6 while the air pressure of 300 kPa was applied for 30 seconds, the water stop performance was particularly good “ ⁇ ”.
  • Comparative Example 1 the water-stopping silicone rubber was insufficient in flexibility, and when the water-stopping portion 6 was bent so that the force was applied, the water-stopping performance deteriorated and the air leak test did not satisfy the result.
  • the water-stopping silicone rubber has sufficient flexibility and strength, and the water-stopping performance is maintained even if the water-stopping portion 6 is bent so that a force is applied. It was a satisfactory result.
  • the strength was insufficient due to poor curing, and the air leak test was not satisfactory.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Insulated Conductors (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Insulating Materials (AREA)
  • Sealing Material Composition (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

Provided are: a silicone rubber composition for waterproofing which is capable of maintaining waterproofing performance even if flexing and bending occur; a silicone rubber moulded body for waterproofing; and a wire harness. This silicone rubber composition for waterproofing includes a platinum catalyst and a thermosetting silicone rubber, has a Shore A hardness of not more than 25 after being cured, and has a breaking strength of at least 5.0 MPa after being cured. The silicone rubber composition for waterproofing is used in a waterproofing part of a wire harness. It is preferable that a sulfur-based compound be included in addition to the platinum catalyst and the thermosetting silicone rubber.

Description

止水用シリコーンゴム組成物、止水用シリコーンゴム成形体およびワイヤーハーネスSilicone rubber composition for water stop, silicone rubber molded body for water stop and wire harness

　本発明は、止水用シリコーンゴム組成物、止水用シリコーンゴム成形体およびワイヤーハーネスに関し、さらに詳しくは、ワイヤーハーネスの止水部に用いられる止水用シリコーンゴム組成物、止水用シリコーンゴム成形体およびワイヤーハーネスに関するものである。 The present invention relates to a water-stopping silicone rubber composition, a water-stopping silicone rubber molding, and a wire harness, and more specifically, a water-stopping silicone rubber composition used for a water-stopping portion of a wire harness, and a water-stopping silicone rubber. The present invention relates to a molded body and a wire harness.

　自動車用ワイヤーハーネスの中で、車外、特にエンジンルームに使用されるワイヤーハーネスは、雨水などの水に接することがある。このため、この種のワイヤーハーネスでは、電線端末や電線間、ハウジング内などにおいて止水処理が施されることがある。 Among wire harnesses for automobiles, wire harnesses used outside the vehicle, particularly in the engine room, may come in contact with water such as rainwater. For this reason, in this kind of wire harness, a water stop process may be performed in an electric wire terminal, between electric wires, the inside of a housing, etc.

特開２００３－３０８７４２号公報JP 2003-308742 A 特開２０１２－１６４６０２号公報JP 2012-164602 A

　ワイヤーハーネスには、配策時などに屈曲や曲げが発生することがある。止水部に屈曲や曲げの力がかかると、止水部から止水剤が剥がれたりして止水性能が低下するおそれがある。 ワ イ ヤ ー Bending and bending may occur in wiring harnesses during routing. If bending or bending force is applied to the water-stopping part, the water-stopping agent may be peeled off from the water-stopping part and the water-stopping performance may be deteriorated.

　本発明の解決しようとする課題は、屈曲や曲げが発生しても止水性能を維持できる止水用シリコーンゴム組成物、止水用シリコーンゴム成形体およびワイヤーハーネスを提供することにある。 The problem to be solved by the present invention is to provide a water-stopping silicone rubber composition, a water-stopping silicone rubber molded product, and a wire harness that can maintain water-stopping performance even when bending or bending occurs.

　上記課題を解決するため本発明に係る止水用シリコーンゴム組成物は、ワイヤーハーネスの止水部に用いられる止水用シリコーンゴム組成物であって、白金触媒および熱硬化性シリコーンゴムを含み、硬化後のショアＡ硬度が２５以下、硬化後の破断強度が５．０ＭＰａ以上であることを要旨とするものである。 In order to solve the above problems, a silicone rubber composition for water stop according to the present invention is a silicone rubber composition for water stop used for a water stop portion of a wire harness, and includes a platinum catalyst and a thermosetting silicone rubber. The gist is that the Shore A hardness after curing is 25 or less and the breaking strength after curing is 5.0 MPa or more.

　前記白金触媒および熱硬化性シリコーンゴムとともに硫黄系化合物を含むことが好ましい。前記硫黄系化合物の含有量は、前記熱硬化性シリコーンゴム１００質量部に対し、０．０８～１．０質量部の範囲内であることが好ましい。 It is preferable that a sulfur-based compound is included together with the platinum catalyst and the thermosetting silicone rubber. The content of the sulfur compound is preferably in the range of 0.08 to 1.0 part by mass with respect to 100 parts by mass of the thermosetting silicone rubber.

　そして、本発明に係る止水用シリコーンゴム成形体は、上記の止水用シリコーンゴム組成物の硬化物からなることを要旨とするものである。 And the gist of the silicone rubber molded body for water stop according to the present invention consists of a cured product of the above-mentioned silicone rubber composition for water stop.

　また、本発明に係るワイヤーハーネスは、上記の止水用シリコーンゴム成形体がワイヤーハーネスの止水部に配置されていることを要旨とするものである。 The gist of the wire harness according to the present invention is that the above-mentioned silicone rubber molded body for water stop is disposed in the water stop portion of the wire harness.

　本発明に係る止水用シリコーンゴム組成物によれば、白金触媒および熱硬化性シリコーンゴムを含み、硬化後のショアＡ硬度が２５以下、硬化後の破断強度が５．０ＭＰａ以上であることから、ワイヤーハーネスの止水部に用いたときに、屈曲や曲げが発生しても止水性能を維持できる。また、本発明に係る止水用シリコーンゴム成形体およびこれを用いた本発明に係るワイヤーハーネスによれば、屈曲や曲げが発生しても止水性能を維持できる。 The water-stop silicone rubber composition according to the present invention includes a platinum catalyst and a thermosetting silicone rubber, and has a Shore A hardness of 25 or less after curing and a breaking strength after curing of 5.0 MPa or more. When used in a water-stop part of a wire harness, the water-stop performance can be maintained even if bending or bending occurs. Further, according to the silicone rubber molded body for water stop according to the present invention and the wire harness according to the present invention using the same, water stop performance can be maintained even if bending or bending occurs.

本発明の一実施形態に係るワイヤーハーネスの断面図であり、電線端末に止水処理を施したものである。It is sectional drawing of the wire harness which concerns on one Embodiment of this invention, and performs a water stop process to the electric wire terminal. 本発明の一実施形態に係るワイヤーハーネスの断面図であり、電線間に止水処理を施したものである。It is sectional drawing of the wire harness which concerns on one Embodiment of this invention, and performs the water stop process between electric wires. 本発明の一実施形態に係るワイヤーハーネスの断面図であり、ハウジング内に止水処理を施したものである。It is sectional drawing of the wire harness which concerns on one Embodiment of this invention, and performs a water stop process in the housing. 止水性の評価方法の説明図である。It is explanatory drawing of the water-stop evaluation method.

　次に、本発明の実施形態について詳細に説明する。 Next, an embodiment of the present invention will be described in detail.

　本発明に係る止水用シリコーンゴム組成物（以下、本組成物ということがある）は、ワイヤーハーネスの止水部に用いられる止水用シリコーンゴム組成物であって、白金触媒および熱硬化性シリコーンゴムを含み、硬化後のショアＡ硬度が２５以下、硬化後の破断強度が５．０ＭＰａ以上である。 The silicone rubber composition for water stop according to the present invention (hereinafter sometimes referred to as the present composition) is a silicone rubber composition for water stop used for a water stop portion of a wire harness, and includes a platinum catalyst and thermosetting. Including silicone rubber, the Shore A hardness after curing is 25 or less, and the breaking strength after curing is 5.0 MPa or more.

　熱硬化性シリコーンゴムは、付加反応型（付加硬化型）のシリコーンゴムであり、主成分としてのアルケニル基含有オルガノポリシロキサンと硬化剤としてのヒドロシリル基含有オルガノポリシロキサンとを含む。白金触媒は、熱硬化性シリコーンゴムの架橋触媒である。アルケニル基としては、ビニル基、アリル基、ブテニル基、ペンテニル基などが挙げられる。オルガノポリシロキサンは、ポリシロキサン鎖（－Ｓｉ－Ｏ－Ｓｉ－Ｏ－）を主鎖とし、Ｓｉ上に有機基を有するものである。オルガノポリシロキサンの有機基としては、メチル基、エチル基、フェニル基などが挙げられる。 The thermosetting silicone rubber is an addition reaction type (addition curing type) silicone rubber, and includes an alkenyl group-containing organopolysiloxane as a main component and a hydrosilyl group-containing organopolysiloxane as a curing agent. The platinum catalyst is a crosslinking catalyst for thermosetting silicone rubber. Examples of the alkenyl group include a vinyl group, an allyl group, a butenyl group, and a pentenyl group. The organopolysiloxane has a polysiloxane chain (—Si—O—Si—O—) as a main chain and has an organic group on Si. Examples of the organic group of the organopolysiloxane include a methyl group, an ethyl group, and a phenyl group.

　本組成物は、硬化後のショアＡ硬度が２５以下であることにより、柔軟性に優れ、ワイヤーハーネスの止水部に用いたときに屈曲や曲げが発生しても止水部に亀裂や隙間などの欠陥が生じるのを抑えることができる。これにより、止水性能を維持することができる。ショアＡ硬度は、ＪＩＳ　Ｋ６２５３に準拠して測定される。硬化後のショアＡ硬度は、より好ましくは２３以下、さらに好ましくは２０以下である。また、硬化後のショアＡ硬度は、強度を確保するなどの観点から、１５以上が好ましい。より好ましくは１８以上である。適度な強度が確保されることで、ワイヤーハーネスの止水部に用いたときに屈曲や曲げが発生しても止水部に亀裂や隙間などの欠陥が生じるのを抑えることができる。 This composition is excellent in flexibility because the Shore A hardness after curing is 25 or less, and even when bending or bending occurs when used in the water-stop part of the wire harness, the water-stop part has cracks or gaps. The occurrence of such defects can be suppressed. Thereby, water stop performance can be maintained. Shore A hardness is measured according to JIS K6253. The Shore A hardness after curing is more preferably 23 or less, and even more preferably 20 or less. Further, the Shore A hardness after curing is preferably 15 or more from the viewpoint of ensuring strength. More preferably, it is 18 or more. By securing an appropriate strength, it is possible to suppress the occurrence of defects such as cracks and gaps in the water stop portion even when bending or bending occurs when used in the water stop portion of the wire harness.

　また、本組成物は、硬化後の破断強度が５．０ＭＰａ以上であることにより、ワイヤーハーネスの止水部に用いたときに屈曲や曲げが発生しても止水部に亀裂や隙間などの欠陥が生じるのを抑えることができる。破断強度は、ＪＩＳ　Ｋ６２５２に準拠して測定される。硬化後の破断強度は、好ましくは５．３ＭＰａ以上、より好ましくは７．０ＭＰａ以上、さらに好ましくは７．５ＭＰａ以上である。また、硬化後の破断強度は、１０．５ＭＰａ以下が好ましい。硬化後の破断強度が１０．５ＭＰａ以下であると、柔軟性を確保しやすい。硬化後の破断強度は、より好ましくは１０．１ＭＰａ以下、さらに好ましくは９．５ＭＰａ以下である。 In addition, this composition has a breaking strength after curing of 5.0 MPa or more, so that even when bending or bending occurs when used in the water-stop part of the wire harness, the water-stop part has cracks or gaps. It is possible to suppress the occurrence of defects. The breaking strength is measured according to JIS K6252. The breaking strength after curing is preferably 5.3 MPa or more, more preferably 7.0 MPa or more, and further preferably 7.5 MPa or more. Further, the breaking strength after curing is preferably 10.5 MPa or less. When the breaking strength after curing is 10.5 MPa or less, it is easy to ensure flexibility. The breaking strength after curing is more preferably 10.1 MPa or less, and still more preferably 9.5 MPa or less.

　本組成物において、硬化後のショアＡ硬度や硬化後の破断強度は熱硬化性シリコーンゴムの組成等に影響されるが、主成分と硬化剤の配合比の調整だけでは硬化後のショアＡ硬度を上記範囲まで低くすることは難しい。本発明では、例えば白金触媒の活性を低下させてシリコーンゴムの架橋点を減ずる方法にて、硬化後のショアＡ硬度を通常の熱硬化性シリコーンゴムのものよりも低くしている。また、これに伴い、硬化後の破断強度も低くしている。白金触媒の活性を低下させてシリコーンゴムの架橋点を減ずる方法としては、白金触媒および熱硬化性シリコーンゴムとともに硫黄系化合物を配合することなどが挙げられる。硫黄系化合物は、通常、白金触媒の触媒毒であり、白金触媒を用いて熱硬化する熱硬化性シリコーンゴムにおいて硫黄系化合物を添加することは忌避される。本発明では、白金触媒の活性を低下させてシリコーンゴムの架橋点を減ずるために、硫黄系化合物を配合している。 In this composition, the Shore A hardness after curing and the breaking strength after curing are affected by the composition of the thermosetting silicone rubber, etc., but only by adjusting the blend ratio of the main component and the curing agent, the Shore A hardness after curing Is difficult to reduce to the above range. In the present invention, for example, the Shore A hardness after curing is made lower than that of ordinary thermosetting silicone rubber by a method of reducing the crosslinking point of the silicone rubber by reducing the activity of the platinum catalyst. Along with this, the breaking strength after curing is also lowered. Examples of a method for reducing the crosslinking point of the silicone rubber by reducing the activity of the platinum catalyst include blending a sulfur compound with the platinum catalyst and the thermosetting silicone rubber. A sulfur compound is usually a catalyst poison of a platinum catalyst, and adding a sulfur compound in a thermosetting silicone rubber that is thermally cured using a platinum catalyst is avoided. In the present invention, in order to reduce the activity of the platinum catalyst and reduce the crosslinking point of the silicone rubber, a sulfur-based compound is blended.

　硫黄系化合物は、特に限定されるものではないが、白金触媒の活性を低下させてシリコーンゴムの架橋点を減らしやすいなどの観点から、末端にＳＨ基を有するチオール化合物が好ましい。チオール化合物は、単官能のものであってもよいし、多官能のものであってもよい。多官能のものとは、１分子中にＳＨ基を複数有する化合物であり、単官能のものとは、１分子中にＳＨ基を１つ有する化合物である。 The sulfur-based compound is not particularly limited, but a thiol compound having an SH group at the terminal is preferable from the viewpoint of reducing the activity of the platinum catalyst and easily reducing the crosslinking point of the silicone rubber. The thiol compound may be monofunctional or polyfunctional. The polyfunctional one is a compound having a plurality of SH groups in one molecule, and the monofunctional one is a compound having one SH group in one molecule.

　硫黄系化合物の含有量は、熱硬化性シリコーンゴム１００質量部に対し、０．０８～１．０質量部の範囲内であることが好ましい。より好ましくは、０．５～１．０質量部の範囲内である。硫黄系化合物の含有量を相対的に多くすると、白金触媒の活性を低下させてシリコーンゴムの架橋点を減ずる効果が向上し、柔軟性が向上する。硫黄系化合物の含有量を相対的に少なくすると、架橋点を確保して、強度を向上する。 The content of the sulfur compound is preferably in the range of 0.08 to 1.0 part by mass with respect to 100 parts by mass of the thermosetting silicone rubber. More preferably, it is in the range of 0.5 to 1.0 part by mass. When the content of the sulfur compound is relatively increased, the effect of reducing the activity of the platinum catalyst and reducing the crosslinking point of the silicone rubber is improved, and the flexibility is improved. When the content of the sulfur compound is relatively reduced, a crosslinking point is secured and the strength is improved.

　本組成物は、柔軟性の観点から、硬化後の物性として、破断伸びが６５０％以上であることが好ましい。より好ましくは７００％以上である。また、架橋密度が４．０×１０－４ｍｏｌ／ｃｃ以下であることが好ましい。また、強度の観点から、硬化後の物性として、破断伸びが９００％以下であることが好ましい。また、架橋密度が２．０×１０－４ｍｏｌ／ｃｃ以上であることが好ましい。破断伸びは、ＪＩＳ　Ｋ６２５２に準拠して測定される。架橋密度は、動的粘弾性の測定結果から算出することができる。本組成物は、所望の位置への塗布しやすさ、柔軟性の得られやすさなどから、室温において液状であることが好ましい。 From the viewpoint of flexibility, the composition preferably has an elongation at break of 650% or more as a physical property after curing. More preferably, it is 700% or more. Further, it is preferable that the crosslink density is less than 4.0 × 10 -4 mol / cc. Further, from the viewpoint of strength, it is preferable that the elongation at break is 900% or less as a physical property after curing. The crosslink density is preferably 2.0 × 10 −4 mol / cc or more. The elongation at break is measured according to JIS K6252. The crosslinking density can be calculated from the measurement result of dynamic viscoelasticity. The composition is preferably in a liquid state at room temperature because it can be easily applied to a desired position and flexibility can be easily obtained.

　本組成物を用いて得られる、本発明に係る止水用シリコーンゴム成形体（以下、本成形体ということがある）は、本組成物の硬化物からなる。本成形体は、ワイヤーハーネスの止水部に用いられる成形体であり、本組成物をワイヤーハーネスの止水部に配置後、硬化して得られた成形体であってもよいし、予め所定の形状に成形した後、ワイヤーハーネスの止水部に配置する成形体であってもよい。後者の成形体としては、予め円筒状に成形されたゴム栓などが挙げられる。 The silicone rubber molded body for water-stopping according to the present invention (hereinafter sometimes referred to as the present molded body) obtained using the present composition comprises a cured product of the present composition. This molded object is a molded object used for the water stop part of a wire harness, and the molded object obtained by arrange | positioning this composition in the water stop part of a wire harness, and hardening may be sufficient, and it is predetermined. After forming into the shape, a molded body placed in the water stop portion of the wire harness may be used. Examples of the latter molded body include a rubber plug that has been molded into a cylindrical shape in advance.

　本組成物、本成形体を用い、ワイヤーハーネスの止水部に止水処理を行う。本発明に係るワイヤーハーネスは、本成形体がワイヤーハーネスの止水部に配置されているものからなる。ワイヤーハーネスは、少なくとも１本の絶縁電線を有する。絶縁電線は、導体と、導体の外周を被覆する被覆材と、を有する。ワイヤーハーネスの絶縁電線は、電線端末で接続端子が接続される。また、電線端末でハウジング（コネクタハウジング）に収容される。 The water stop treatment is performed on the water stop portion of the wire harness using the composition and the molded body. The wire harness which concerns on this invention consists of this molded object arrange | positioned at the water stop part of a wire harness. The wire harness has at least one insulated wire. The insulated wire has a conductor and a covering material that covers the outer periphery of the conductor. As for the insulated wire of a wire harness, a connection terminal is connected by an electric wire terminal. Moreover, it is accommodated in a housing (connector housing) at a wire end.

　ワイヤーハーネスの止水部としては、ワイヤーハーネスに含まれる絶縁電線の電線端末における被覆材と導体との間に位置する止水部や、ワイヤーハーネスに含まれる複数本の絶縁電線の被覆材間に位置する止水部や、ワイヤーハーネスに含まれる絶縁電線とハウジングとの間に位置する止水部などが挙げられる。 As a water stop part of a wire harness, between the water stop part located between the coating | covering material and conductor in the electric wire terminal of the insulated wire contained in a wire harness, and the coating | covering material of the several insulated wire contained in a wire harness The water stop part located, the water stop part located between the insulated wire contained in a wire harness, and a housing are mentioned.

　図１には、本発明の一実施形態に係るワイヤーハーネスとして、電線端末に止水処理を施したものを示す。図２には、本発明の一実施形態に係るワイヤーハーネスとして、電線間に止水処理を施したものを示す。図３には、本発明の一実施形態に係るワイヤーハーネスとして、ハウジング内に止水処理を施したものを示す。 FIG. 1 shows a wire harness according to an embodiment of the present invention in which a wire terminal is subjected to a water stop treatment. In FIG. 2, what gave the water stop process between electric wires as a wire harness which concerns on one Embodiment of this invention is shown. FIG. 3 shows a wire harness according to an embodiment of the present invention that has been subjected to a water stop treatment in the housing.

　図１において、ワイヤーハーネスに含まれる絶縁電線１０は、電線端末で被覆材１４が皮剥ぎされて導体１２が部分的に露出されている。露出された導体１２の端末には、端子金具１６が接続されている。電線端末では導体１２が部分的に露出されているので、被覆材１４と導体１２の間１３から電線内部に水が浸入するおそれがある。被水する可能性のある場所に配置されるワイヤーハーネスでは、このような電線端末を止水する必要がある。そこで、図１では、電線端末において、露出された導体１２と被覆材１４との間を塞ぐように本組成物を配置し、硬化することにより、止水処理を行う。これにより、止水用シリコーンゴム成形体１５がワイヤーハーネスの止水部に配置される。 In FIG. 1, the insulated wire 10 included in the wire harness has the conductor 12 partially exposed by peeling the covering material 14 at the end of the wire. A terminal fitting 16 is connected to the end of the exposed conductor 12. Since the conductor 12 is partially exposed at the end of the wire, water may enter the inside of the wire from between the covering material 14 and the conductor 12. In a wire harness arranged at a place where there is a possibility of being flooded, it is necessary to stop such an electric wire terminal. Therefore, in FIG. 1, the water stop treatment is performed by arranging and curing the present composition so as to block between the exposed conductor 12 and the covering material 14 in the electric wire terminal. Thereby, the silicone rubber molding 15 for water stop is arrange | positioned in the water stop part of a wire harness.

　図２において、ワイヤーハーネスは、複数本の絶縁電線１０，１１を含む。被水する可能性のある場所に配置されるワイヤーハーネスでは、複数本の絶縁電線１０，１１の被覆材１４，１４間から水が浸入するおそれがある。そこで、図２では、複数本の絶縁電線１０，１１の被覆材１４，１４間を塞ぐように本組成物を配置し、硬化することにより、止水処理を行う。これにより、止水用シリコーンゴム成形体１５がワイヤーハーネスの止水部に配置される。 2, the wire harness includes a plurality of insulated wires 10 and 11. In a wire harness arranged at a place where there is a possibility of being exposed to water, water may enter from between the covering materials 14 and 14 of the plurality of insulated wires 10 and 11. Therefore, in FIG. 2, the water-stopping treatment is performed by arranging and curing the present composition so as to block between the covering materials 14 and 14 of the plurality of insulated wires 10 and 11. Thereby, the silicone rubber molding 15 for water stop is arrange | positioned in the water stop part of a wire harness.

　図３において、ワイヤーハーネスに含まれる絶縁電線１０は、電線端末でハウジング（コネクタハウジング）１７に収容される。被水する可能性のある場所に配置されるワイヤーハーネスでは、絶縁電線１０とハウジング１７との間から水が浸入するおそれがある。そこで、図３では、絶縁電線１０とハウジング１７との間を塞ぐように本組成物を配置し、硬化することにより、止水処理を行う。これにより、止水用シリコーンゴム成形体１５がワイヤーハーネスの止水部に配置される。 3, the insulated wire 10 included in the wire harness is accommodated in a housing (connector housing) 17 at the end of the wire. In a wire harness arranged at a place where there is a possibility of being flooded, water may enter from between the insulated wire 10 and the housing 17. Therefore, in FIG. 3, the water-stopping treatment is performed by arranging and curing the present composition so as to block the space between the insulated wire 10 and the housing 17. Thereby, the silicone rubber molding 15 for water stop is arrange | positioned in the water stop part of a wire harness.

　絶縁電線の被覆材１４の材料は、特に限定されるものではなく、絶縁性の樹脂材料などであればよい。絶縁性の樹脂材料としては、例えば、塩化ビニル樹脂、オレフィン系樹脂、シリコーンゴムなどが挙げられる。絶縁性の樹脂材料には、被覆材に添加される添加剤が含まれていてもよい。添加剤としては、例えば難燃剤、酸化防止剤などが挙げられる。 The material of the insulating wire covering material 14 is not particularly limited, and may be an insulating resin material or the like. Examples of the insulating resin material include vinyl chloride resin, olefin resin, and silicone rubber. The insulating resin material may contain an additive added to the coating material. Examples of the additive include a flame retardant and an antioxidant.

　導体１２は、単線で構成されていてもよいし、複数本の素線で構成されていてもよい。単線あるいは複数本の素線は、金属素線、有機繊維から選択される１種または２種以上から構成される。金属素線としては、導電性に優れる銅、銅合金、アルミニウム、アルミニウム合金などが用いられる。また、補強線（テンションメンバ）として、ステンレスなどが用いられてもよい。有機繊維としては、導電性を有する有機繊維や非導電性の有機繊維が用いられる。導電性を有する有機繊維は、繊維内部に導電性フィラーを含む導電性繊維であってもよいし、有機繊維の外周に金属層が被覆されてなる導電性繊維であってもよい。非導電性の有機繊維は、補強線（テンションメンバ）として用いられるとよい。複数本の素線は、撚り合わされて撚線とされたものであってもよいし、撚り合わされていないものであってもよい。 The conductor 12 may be composed of a single wire or a plurality of strands. The single wire or the plurality of strands is composed of one or more selected from metal strands and organic fibers. As the metal strand, copper, copper alloy, aluminum, aluminum alloy, etc., which are excellent in conductivity are used. Further, stainless steel or the like may be used as the reinforcing wire (tension member). As the organic fiber, conductive organic fiber or non-conductive organic fiber is used. The conductive organic fiber may be a conductive fiber containing a conductive filler inside the fiber, or may be a conductive fiber in which a metal layer is coated on the outer periphery of the organic fiber. The non-conductive organic fiber is preferably used as a reinforcing wire (tension member). The plurality of strands may be twisted to form a twisted wire, or may not be twisted.

　以下、本発明の実施例、比較例を示す。 Hereinafter, examples of the present invention and comparative examples will be shown.

（実施例１－５、比較例２）
＜シリコーンゴム組成物の調製＞
　表１に記載の配合組成（質量部）で、白金触媒を含む熱硬化性シリコーンゴムおよび硫黄系化合物を配合し、大気中、室温下でミキサーにて６０分混合した。これにより、シリコーンゴム組成物を得た。
・白金触媒を含む熱硬化性シリコーンゴム：東レ・ダウコーニング製「７－６８４０Ａ」「７－６８４０Ｂ」
・硫黄系化合物＜１＞：ＳＣ有機化学製、２－エチルヘキシル－３－メルカプトプロピオネート
・硫黄系化合物＜２＞：ＳＣ有機化学製、トリメチロールプロパントリス（３－メルカプトプロピオネート） (Example 1-5, Comparative Example 2)
<Preparation of silicone rubber composition>
A thermosetting silicone rubber containing a platinum catalyst and a sulfur compound were blended with the blending composition (parts by mass) shown in Table 1, and mixed in a mixer at room temperature for 60 minutes in the air. Thereby, a silicone rubber composition was obtained.
-Thermosetting silicone rubber containing platinum catalyst: “7-6840A” and “7-6840B” manufactured by Toray Dow Corning
・ Sulfur-based compound <1>: manufactured by SC Organic Chemical Co., Ltd., 2-ethylhexyl-3-mercaptopropionate ・ Sulfur-based compound <2>: manufactured by SC Organic Chemical Co., Ltd., trimethylolpropane tris (3-mercaptopropionate)

＜シリコーンゴム硬化物の作製＞
　得られたシリコーンゴム組成物をプレス枠中、１８０℃、１０ＭＰａの条件で１分間プレス成形を行い、板状（２００ｍｍ×２００ｍｍ×２ｍｍ）のシリコーンゴム硬化物を作製した。 <Preparation of cured silicone rubber>
The obtained silicone rubber composition was press-molded in a press frame for 1 minute under the conditions of 180 ° C. and 10 MPa to prepare a plate-shaped (200 mm × 200 mm × 2 mm) cured silicone rubber.

＜電線端末の止水処理＞
　ＰＶＣ被覆電線の電線端末で被覆材を皮剥ぎして導体を露出し、図１に示すように露出された導体と被覆材との間を塞ぐようにシリコーンゴム組成物を配置し、熱硬化させた。これにより、電線端末の止水処理を行った。 <Water stop treatment of the wire terminal>
The conductor is exposed by peeling off the covering material at the end of the PVC-coated electric wire, and a silicone rubber composition is disposed so as to block between the exposed conductor and the covering material as shown in FIG. It was. Thereby, the water stop process of the electric wire terminal was performed.

（比較例１）
＜シリコーンゴム組成物の調製＞
　表１に記載の配合組成（質量部）で、熱硬化性シリコーンゴムを配合し、大気中、室温下でミキサーにて６０分混合した。これにより、シリコーンゴム組成物を得た。硫黄系化合物を配合しなかった。
＜シリコーンゴム硬化物の作製＞
　実施例と同様にシリコーンゴム硬化物を作製した。
＜電線端末の止水処理＞
　実施例と同様に電線端末の止水処理を行った。 (Comparative Example 1)
<Preparation of silicone rubber composition>
A thermosetting silicone rubber was blended with the blending composition (parts by mass) shown in Table 1, and mixed in the atmosphere at room temperature for 60 minutes with a mixer. Thereby, a silicone rubber composition was obtained. A sulfur-based compound was not blended.
<Preparation of cured silicone rubber>
A cured silicone rubber was prepared in the same manner as in the examples.
<Water stop treatment of the wire terminal>
The water stop process of the electric wire terminal was performed similarly to the Example.

（破断伸び、破断強度）
　得られた板状のシリコーンゴム硬化物をＪＩＳ　Ｋ６２５２に準拠して３号ダンベルに打ち抜き、伸張モジュラス（破断伸び、破断強度）を測定した。 (Elongation at break, strength at break)
The obtained plate-shaped silicone rubber cured product was punched into a No. 3 dumbbell according to JIS K6252, and the elongation modulus (breaking elongation, breaking strength) was measured.

（架橋密度）
　得られた板状のシリコーンゴム硬化物を１０ｍｍ×５ｍｍ×２ｍｍに打ち抜き、動的粘弾性を測定し、測定結果をもとに架橋密度を算出した。 (Crosslink density)
The obtained plate-like silicone rubber cured product was punched into 10 mm × 5 mm × 2 mm, the dynamic viscoelasticity was measured, and the crosslinking density was calculated based on the measurement result.

（ショアＡ硬度）
　得られた板状のシリコーンゴム硬化物を用い、ＪＩＳ　Ｋ６２５３に準拠してショアＡ硬度を測定した。 (Shore A hardness)
Using the obtained plate-like cured silicone rubber, the Shore A hardness was measured according to JIS K6253.

（エアリーク試験）
　図４に示すように、電線端末をシリコーンゴム硬化物２で止水処理した絶縁電線１の端部にゴムチューブ３を挿入し、絶縁電線１全体を水槽４中に入れ、止水部６に力がかかるように導体５を矢印の方向に屈曲させた状態で、ゴムチューブ３からエア圧を加えた。２００ｋＰａのエア圧を３０秒間加圧している間に止水部６からからエア漏れがなければ、止水性能が合格である「○」とし、エア漏れがあれば不合格「×」と評価した。また、３００ｋＰａのエア圧を３０秒間加圧している間に止水部６からからエア漏れがなければ、止水性能が特に良好「◎」とした。 (Air leak test)
As shown in FIG. 4, the rubber tube 3 is inserted into the end portion of the insulated wire 1 whose water terminal is water-stopped with the cured silicone rubber 2, and the entire insulated wire 1 is placed in the water tank 4. Air pressure was applied from the rubber tube 3 in a state where the conductor 5 was bent in the direction of the arrow so that a force was applied. If there was no air leak from the water stop section 6 while the air pressure of 200 kPa was being applied for 30 seconds, the water stop performance was evaluated as “◯”, and if there was air leak, it was evaluated as “No”. . In addition, when there was no air leakage from the water stop portion 6 while the air pressure of 300 kPa was applied for 30 seconds, the water stop performance was particularly good “◎”.

Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001

　比較例１では、止水用のシリコーンゴムの柔軟性が足りず、止水部６に力がかかるように屈曲させると止水性能が低下し、エアリーク試験で満足する結果とならなかった。これに対し、実施例１～８では、止水用のシリコーンゴムの柔軟性および強度が十分であり、止水部６に力がかかるように屈曲させても止水性能は維持され、エアリーク試験で満足する結果となった。なお、比較例２は、硬化不良で強度が不足し、エアリーク試験で満足する結果とならなかった。 In Comparative Example 1, the water-stopping silicone rubber was insufficient in flexibility, and when the water-stopping portion 6 was bent so that the force was applied, the water-stopping performance deteriorated and the air leak test did not satisfy the result. On the other hand, in Examples 1 to 8, the water-stopping silicone rubber has sufficient flexibility and strength, and the water-stopping performance is maintained even if the water-stopping portion 6 is bent so that a force is applied. It was a satisfactory result. In Comparative Example 2, the strength was insufficient due to poor curing, and the air leak test was not satisfactory.

　以上、本発明の実施の形態について詳細に説明したが、本発明は上記実施の形態に何ら限定されるものではなく、本発明の要旨を逸脱しない範囲で種々の改変が可能である。 The embodiments of the present invention have been described in detail above, but the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.

１０、１１　絶縁電線
１２　導体
１４　被覆材
１５　止水用シリコーンゴム成形体

  DESCRIPTION OF SYMBOLS 10, 11 Insulated electric wire 12 Conductor 14 Coating | covering material 15 Silicone rubber molding for water stop

Claims (5)

　ワイヤーハーネスの止水部に用いられる止水用シリコーンゴム組成物であって、白金触媒および熱硬化性シリコーンゴムを含み、硬化後のショアＡ硬度が２５以下、硬化後の破断強度が５．０ＭＰａ以上であることを特徴とする止水用シリコーンゴム組成物。 A silicone rubber composition for water stopping used for a water stopping part of a wire harness, comprising a platinum catalyst and a thermosetting silicone rubber, having a Shore A hardness of 25 or less after curing, and a breaking strength after curing of 5.0 MPa. A silicone rubber composition for water stopping, which is as described above. 　前記白金触媒および熱硬化性シリコーンゴムとともに硫黄系化合物を含むことを特徴とする請求項１に記載の止水用シリコーンゴム組成物。 The silicone rubber composition for waterstop according to claim 1, comprising a sulfur compound together with the platinum catalyst and the thermosetting silicone rubber. 　前記硫黄系化合物の含有量が、前記熱硬化性シリコーンゴム１００質量部に対し、０．０８～１．０質量部の範囲内であることを特徴とする請求項２に記載の止水用シリコーンゴム組成物。 The water-stopping silicone according to claim 2, wherein the content of the sulfur compound is in the range of 0.08 to 1.0 part by mass with respect to 100 parts by mass of the thermosetting silicone rubber. Rubber composition. 　請求項１から３のいずれか１項に記載の止水用シリコーンゴム組成物の硬化物からなることを特徴とする止水用シリコーンゴム成形体。 A silicone rubber molded body for waterstop, comprising a cured product of the silicone rubber composition for waterstop according to any one of claims 1 to 3. 　請求項４に記載の止水用シリコーンゴム成形体がワイヤーハーネスの止水部に配置されていることを特徴とするワイヤーハーネス。 5. A wire harness, wherein the water-stop silicone rubber molded body according to claim 4 is disposed in a water-stop portion of the wire harness.
PCT/JP2017/017863 2016-05-19 2017-05-11 Silicone rubber composition for waterproofing, silicone rubber moulded body for waterproofing, and wire harness Ceased WO2017199845A1 (en)

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