WO2017199845A1 - Composition de caoutchouc silicone étanche à l'eau, corps moulé de caoutchouc silicone étanche à l'eau, et faisceau électrique - Google Patents

Composition de caoutchouc silicone étanche à l'eau, corps moulé de caoutchouc silicone étanche à l'eau, et faisceau électrique 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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WO
WIPO (PCT)
Prior art keywords
silicone rubber
wire harness
water
waterproofing
rubber composition
Prior art date
Application number
PCT/JP2017/017863
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English (en)
Japanese (ja)
Inventor
隆彰 濱口
Original Assignee
株式会社オートネットワーク技術研究所
住友電装株式会社
住友電気工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 株式会社オートネットワーク技術研究所, 住友電装株式会社, 住友電気工業株式会社 filed Critical 株式会社オートネットワーク技術研究所
Publication of WO2017199845A1 publication Critical patent/WO2017199845A1/fr

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

Abstract

L'invention fournit une composition de caoutchouc silicone étanche à l'eau permettant de préserver des performances d'étanchéité à l'eau y compris en cas de courbure ou pliage, un corps moulé de caoutchouc silicone étanche à l'eau et un faisceau électrique. La composition de caoutchouc silicone étanche à l'eau qui contient un catalyseur au platine et un caoutchouc silicone thermodurcissable, dont la dureté shore A après durcissement est inférieure ou égale à 25, et dont la résistance à la rupture après durcissement est supérieure ou égale à 5,0MPa, est mise en œuvre dans une partie étanche à l'eau du faisceau électrique. De préférence, cette composition de caoutchouc silicone étanche à l'eau contient en même temps que le catalyseur au platine et le caoutchouc silicone thermodurcissable, un composé à base de soufre.
PCT/JP2017/017863 2016-05-19 2017-05-11 Composition de caoutchouc silicone étanche à l'eau, corps moulé de caoutchouc silicone étanche à l'eau, et faisceau électrique WO2017199845A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016-100207 2016-05-19
JP2016100207A JP2017206622A (ja) 2016-05-19 2016-05-19 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

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WO2017199845A1 true WO2017199845A1 (fr) 2017-11-23

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004050758A1 (fr) * 2002-12-05 2004-06-17 Daikin Industries, Ltd. Composition polymere contenant du fluor et corps durci
JP2007217702A (ja) * 2002-03-14 2007-08-30 Daikin Ind Ltd 含フッ素共重合体、含フッ素共重合体製造方法、含フッ素共重合体硬化用組成物及び硬化体
JP2008534768A (ja) * 2005-04-06 2008-08-28 ダウ・コ−ニング・コ−ポレ−ション オルガノシロキサン組成物
JP2011153305A (ja) * 2009-12-29 2011-08-11 Dow Corning Toray Co Ltd シール部材形成用硬化性液状シリコーンゴム組成物およびシール部材
JP2012164433A (ja) * 2011-02-03 2012-08-30 Sumitomo Electric Ind Ltd 細径ケーブルハーネス
JP2014168060A (ja) * 2005-01-24 2014-09-11 Momentive Performance Materials Inc 発光素子封止用シリコーン組成物及び発光装置
JP2014203806A (ja) * 2013-04-10 2014-10-27 矢崎総業株式会社 電線の止水構造及びその製造方法
JP2016058138A (ja) * 2014-09-05 2016-04-21 矢崎総業株式会社 シール部材

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007217702A (ja) * 2002-03-14 2007-08-30 Daikin Ind Ltd 含フッ素共重合体、含フッ素共重合体製造方法、含フッ素共重合体硬化用組成物及び硬化体
WO2004050758A1 (fr) * 2002-12-05 2004-06-17 Daikin Industries, Ltd. Composition polymere contenant du fluor et corps durci
JP2014168060A (ja) * 2005-01-24 2014-09-11 Momentive Performance Materials Inc 発光素子封止用シリコーン組成物及び発光装置
JP2008534768A (ja) * 2005-04-06 2008-08-28 ダウ・コ−ニング・コ−ポレ−ション オルガノシロキサン組成物
JP2011153305A (ja) * 2009-12-29 2011-08-11 Dow Corning Toray Co Ltd シール部材形成用硬化性液状シリコーンゴム組成物およびシール部材
JP2012164433A (ja) * 2011-02-03 2012-08-30 Sumitomo Electric Ind Ltd 細径ケーブルハーネス
JP2014203806A (ja) * 2013-04-10 2014-10-27 矢崎総業株式会社 電線の止水構造及びその製造方法
JP2016058138A (ja) * 2014-09-05 2016-04-21 矢崎総業株式会社 シール部材

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SHORE A, JIS-A, 6 July 2017 (2017-07-06) *

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