DE2847386A1 - Cellular polyurethane filler for longitudinal sealing of cable - of electrical or optical communications type without reducing flexibility - Google Patents

Cellular polyurethane filler for longitudinal sealing of cable - of electrical or optical communications type without reducing flexibility

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Publication number
DE2847386A1
DE2847386A1 DE19782847386 DE2847386A DE2847386A1 DE 2847386 A1 DE2847386 A1 DE 2847386A1 DE 19782847386 DE19782847386 DE 19782847386 DE 2847386 A DE2847386 A DE 2847386A DE 2847386 A1 DE2847386 A1 DE 2847386A1
Authority
DE
Germany
Prior art keywords
foam
polyurethane
water
polyols
cpds
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
DE19782847386
Other languages
German (de)
Inventor
Bjoern Dipl Chem Noethe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
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.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to DE19782847386 priority Critical patent/DE2847386A1/en
Publication of DE2847386A1 publication Critical patent/DE2847386A1/en
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4401—Optical cables
    • G02B6/4429—Means specially adapted for strengthening or protecting the cables
    • G02B6/44384—Means specially adapted for strengthening or protecting the cables the means comprising water blocking or hydrophobic materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/302—Polyurethanes or polythiourethanes; Polyurea or polythiourea
    • 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
    • H01B7/285—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable
    • H01B7/2855—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable using foamed plastic

Abstract

Cellular filler based on polyurethane (urea) for longitudinal sealing of electrical or optical communications cables with plastics-insulated carrier elements and/or corresp. cable fittings is produced by adding much less water than is usual in polyurethane foam mfr. for the isocyanate-water reaction, i.e. max. twice as much as is needed theoretically to produce the required degree of foaming, and partially replacing part of the organic OH cpds. (polyester-polyols, polyether-polyols or polyester-polyether-polyols with equiv. wts. of ca. 100-500) required for the normal polyurethane reaction with cpds. (I) acting as chain inhibitor and internal plasticiser. The filler is not detrimental to flexibility of the cable. Pref. (I) consists of long-chain, aliphatic, branched, monohydric alcohols with an equiv. ratio of 10-50% w.r.t. OH cpds. used; di- or poly-hydroxyl cpds. with equiv. wts. of 800-1600; or isocyanate prepolymers with NCO content of 5-15%.

Description

Schaumartige Füllmasse zur Längsabdichtung elektrischerFoam-like filling compound for longitudinal sealing electrical

oder optischer Nachrichtenkabel mit kunststoffisolierten Ubertragungselementen Die Erfindung bezieht sich auf eine schaumartige Füllmasse auf Polyurethan- oder Polyurethanharnstoff-Basis zur Längsabdichtung von elektrischen oder optischen Nachrichtenkabeln mit kunststoffisolierten Ubertragungselementen und/oder den entsprechenden Kabelgarnituren.or optical communication cables with plastic-insulated transmission elements The invention relates to a foam-like filling compound on polyurethane or Polyurethane urea base for the longitudinal sealing of electrical or optical communication cables with plastic-insulated transmission elements and / or the corresponding cable fittings.

Um bei elektrischen Kabeln, insbesondere bei Nachrichtenkabeln, mit kunststoffisolierten Adern im Schadensfalle die Längsausbreitung von Wasser oder Feuchtigkeit zu unterbinden, ist es bekannt, die Kabelseele mit einer wasserabweisenden oder wasseraufsaugenden Substanz zu füllen. Neben zelluloseartigen Stoffen, die im Kontakt mit Wasser ihr Volumen um ein Vielfaches vergrößern, und neben vaselineartigen Substanzen (DE-OS 23 02 662, DE-OS 24 29 670) kommen hierbei auch schäumbare Polyurethane (DE-OS 23 61 207) in Betracht.In order to use electrical cables, especially communication cables plastic-insulated cores in the event of damage the longitudinal spread of water or To prevent moisture, it is known to provide the cable core with a water-repellent or to fill water-absorbent substance. In addition to cellulosic substances that in contact with water increase their volume many times over, and next to vaseline-like Substances (DE-OS 23 02 662, DE-OS 24 29 670) also include foamable polyurethanes (DE-OS 23 61 207) into consideration.

Bei der Auswahl einer geeigneten Füllmasse müssen im allgemeinen besondere Randbedingungen berücksichtigt werden, wie z. B. die Forderung nach einer guten Beweglichkeit der einzelnen übertragungselemente.When choosing a suitable filling compound, special needs are generally required Boundary conditions are taken into account, such as B. the demand for a good one Mobility of the individual transmission elements.

Der Erfindung liegt die Aufgabe zugrunde, eine FUllmasse der eingangs genannten Art durch geeignete Zusätze mit solchen Eigenschaften auszustatten, daß sie sowohl zur Abdichtung in Garnituren als auch Kabeln einsetzbar ist, ohne die Biegefähigkeit der Kabel namhaft nachhaltig zu beeinflussen.The invention is based on the object of providing a filling compound of the initially mentioned to equip the type mentioned by suitable additives with such properties that it can be used both for sealing in fittings and cables without the Influencing the bending ability of the cables in a notably sustainable manner.

Zur Lösung dieser Aufgabe wird gemäß der Erfindung vorgeschlagen, daß das für die Isocyanat-Wasser-Reaktion benötigte Wasser in wesentlich geringerer Menge zugesetzt wird, als es bei der Polyurethan-Schaumstoff-Herstellung üblich ist, und zwar maximal eine zweimal so große Wassermenge, wie theoretisch zur Erzielung des gewünschten Verschäumungsgrades erforderlich ist und daß die für die normale Polyurethan-Reaktion erforderlichen organischen Hydroxyl-Verbindungen, die zu den üblichen Polyesterpolyolen, Polyätherpolyolen oder Polyester-Polyätherpolyolen mit Äquivalenzgewichten von ca. 100 bis 500 gehören, teilweise durch als Kettenblocker und innere Weichmacher dienende Verbindungen ersetzt werden.To solve this problem it is proposed according to the invention, that the water required for the isocyanate-water reaction is much less Amount is added than is usual in polyurethane foam production is, namely a maximum of twice as large an amount of water as theoretically to achieve the desired degree of foaming is required and that the normal Polyurethane required organic hydroxyl compounds leading to the reaction conventional polyester polyols, polyether polyols or polyester-polyether polyols with Equivalence weights of around 100 to 500 belong, in part, as a chain blocker and compounds serving internal plasticizers are replaced.

Der verringerte Wasserzusatz führt zu einer relativ zur üblichen Verschäumung langsamen Reaktion und zu einem verringerten Anfall von Treibgas, wodurch einem Entweichen des Treibgases und auch einem Zusammenfallen der Schaumzellen durch thermische Kontraktion vorgebeugt wird. Einer unerwünschten, durch den Wasserzusatz bedingten Versteifung des Schaumes mit einer einhergehenden Verminderung der Klebrigkeit wird durch die Zugabe von klebrig- bzw. weichmachenden Komponenten (Kettenblocker) entgegengewirkt. Eine Migration dieser Stoffe wird durch die Ausbildung von Hauptvalenzen verhindert.The reduced addition of water leads to foaming relative to the usual slow response and a reduced build-up of propellant gas, creating a The propellant gas escapes and the foam cells also collapse due to thermal effects Contraction is prevented. An undesirable one, caused by the addition of water Stiffening of the foam with an associated reduction in stickiness counteracted by adding sticky or plasticizing components (chain blockers). A migration of this Substances are created through the formation of main valences prevented.

Als innere Weichmacher können sowohl langkettige, aliphatische, verzweigte, einwertige Alkohole mit einem Äquivalenzverhältnis von 10-50 % - bezogen auf die eingesetzten Hydroxyl-Verbindungen - als auch Di- oder Polyhydroxyl-Verbindungen mit Äquivalenzgewichten von 800 bis 1600 dienen. Selbstverständlich sind auch Kombinationen der zuvor erwähnten Stoffgruppen denkbar.Long-chain, aliphatic, branched, monohydric alcohols with an equivalence ratio of 10-50% - based on the hydroxyl compounds used - as well as di- or polyhydroxyl compounds serve with equivalent weights from 800 to 1600. Combinations are of course also possible of the aforementioned groups of substances are conceivable.

Schließlich eignen sich auch als innere Weichmacher präpolymere Isocyanate mit Isocyangehalten von 5 bis 15 %.Finally, prepolymer isocyanates are also suitable as internal plasticizers with isocyanate contents of 5 to 15%.

Ausführungsbeispiele für eine gemäß der Erfindung ausgebildete schaumartige Füllmasse sind nachfolgend angegeben.Embodiments for a foam-like formed according to the invention Fill mass are given below.

Beispiel 1 46,1 g eines Polyäther-Polyols mit einer Hydroxylzahl von 4,8 bis 5,0 und einer Dichte von ca. Example 1 46.1 g of a polyether polyol having a hydroxyl number from 4.8 to 5.0 and a density of approx.

0,95 g/cm3 und einer Viskosität von ca. 2000 bis 3000 mPa . s bei 25 0C (Komponente A) 17,7 g 2-Octyldodecanol 0,56 g Wasser 21,4 g Hexamethylen - 1.6. - diisocyanat 0,7 g Dibutylzinndilaurat 0,05 g Silicon-Schaumstabilisator Beispiel 2 43,2 g Komponente A 20,3 g 2-Octyldodecanol 0,56 g Wasser 21,4 g Hexamethylen - 1.6. - diisocyanat 0,07 g Dibutylzinndilaurat 0,5 g Silicon-Schaumstabilisator Beispiel 3 -40,0 g Komponente A 23,1 g 2-Octyldododanol 0,56 g Wasser 21,4 g Hexamethylen - 1.6. - diisocyanat 0,1 g Dibutylzinndilaurat 0,5 g Silicon-Schaumstabilisator Beispiel 4 69,6 g eines Polyols auf der Basis von Polybutadien mit einer Hydroxylzahl von ca. 46,5, einem mittleren Molekulargewicht von ca. 2800 und einer Viskosität von 5000 bis 6000 mPa . s bis 25 °C. 0.95 g / cm3 and a viscosity of approx. 2000 to 3000 mPa. s at 25 0C (component A) 17.7 g 2-octyldodecanol 0.56 g water 21.4 g hexamethylene - 1.6. - diisocyanate 0.7 g dibutyltin dilaurate 0.05 g silicone foam stabilizer Example 2 43.2 g component A 20.3 g 2-octyldodecanol 0.56 g water 21.4 g hexamethylene - 1.6. - diisocyanate 0.07 g dibutyltin dilaurate 0.5 g silicone foam stabilizer example 3-40.0 g component A 23.1 g 2-octyldododanol 0.56 g water 21.4 g hexamethylene - 1.6. - diisocyanate 0.1 g dibutyltin dilaurate 0.5 g silicone foam stabilizer Example 4 69.6 g of a polyol based on polybutadiene with a hydroxyl number of approx. 46.5, an average molecular weight of approx. 2800 and a viscosity from 5000 to 6000 mPa. s to 25 ° C.

25.6 g Komponente A 17,4 g 2-Octyldodecanol 1,04 g Wasser 26,0 g Hexamethylen - 1.6. - diisocyanat 0,2 g Dibutylzinndilaurat 0,8 g Silicon-Schaumstabilisator Beispiel 5 43,2 g Komponente A 20,2 g 2-Octyldodecanol 0,56 g Wasser 29,4 g eines im wesentlichen aus Diphenylmethan - 4.4' -diisocyanat bestehenden Diisocyanatgemisches mit einem Isocyanatgehalt von 30 bis 32 %, einer Dichte von 1,22 g/cm3 und einer Viskosität von 100 bis 125 mPA . s bei 25 °C.25.6 g component A 17.4 g 2-octyldodecanol 1.04 g water 26.0 g hexamethylene - 1.6. - diisocyanate 0.2 g dibutyltin dilaurate 0.8 g silicone foam stabilizer Example 5 43.2 g of component A 20.2 g of 2-octyldodecanol 0.56 g of water 29.4 g of a Diisocyanate mixture consisting essentially of diphenylmethane - 4.4 'diisocyanate with an isocyanate content of 30 to 32%, a density of 1.22 g / cm3 and a Viscosity from 100 to 125 mPA. s at 25 ° C.

0,06 g Dibutylzinndilaurat 0,5 g Silicon-Schaumstabilisator O Figuren 4 Ansprüche 0.06 g dibutyltin dilaurate 0.5 g silicone foam stabilizer O figures 4 claims

Claims (4)

Patentansprüche ö Schaumartige Füllmasse auf Polyurethan- oder Polyurethanharnstoff-Basis zur Längsabdichtung von elektrischen oder optischen Nachrichtenkabeln mit kunststoffisolierten Ubertragungselementen und/oder den entsprechenden Kabelgarnituren, d a d u r c h g e k e n n -z e i c h n e t , daß das für die Isocyanat-Wasser-Reaktion benötigte Wasser in wesentlich geringerer Menge zugesetzt wird, als es bei der Polyurethan-Schaumstoff-Herstellung üblich ist, und zwar maximal eine zweimal so große Wassermenge, wie theoretisch zur Erzielung des gewünschten Verschäumungsgrades erforderlich ist, und daß die für die normale Polyurethan-Reaktion erforderlichen organischen Hydroxyl-Verbindungen, die zu den üblichen Polyesterpolyolen, Polyätherpolyolen oder Polyester-Polyätherpolyolen mit Äquivalenzgewichten von ca. 100 bis 500 gehören, teilweise durch als Kettenblocker und innere Weichmacher dienende Verbindungen ersetzt werden. Claims ö Foam-like filling compound based on polyurethane or polyurethane urea for longitudinal sealing of electrical or optical communication cables with plastic-insulated Transmission elements and / or the corresponding cable fittings, d a d u r c h G e k e n n n -z e i c h n e t that this was required for the isocyanate-water reaction Water is added in a much smaller amount than in the production of polyurethane foam is usual, namely a maximum of twice as large an amount of water as theoretically is required to achieve the desired degree of foaming, and that the organic hydroxyl compounds required for the normal polyurethane reaction, the usual polyester polyols, polyether polyols or polyester-polyether polyols with equivalent weights of approx. 100 to 500 belong, partly through as a chain blocker and compounds serving internal plasticizers are replaced. 2. Schaumartige Füllmasse nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß als innere Weichmacher langkettige, aliphatische, verzweigte, einwertige Alkohole mit einem Äquivalenzverhältnis von 10 bis 50 % - bezogen auf die eingesetzten Hydroxyl-Verbindungen -dienen. 2. Foam-like filling compound according to claim 1, d a d u r c h g e k e n n z e i n e t that long-chain, aliphatic, branched, monohydric alcohols with an equivalence ratio of 10 to 50% - based on the hydroxyl compounds used serve. 3. Schaumartige Füllmasse nach Anspruch 1, d a -d u r c h g e k e n n z e i c h n e t , daß als innere Weichmacher Di- oder Polyhydroxyl-Verbindungen mit Äquivalenzgewichten von 800 bis 1600 dienen. 3. Foam-like filling compound according to claim 1, d a -d u r c h g e k e It is not stated that di- or polyhydroxyl compounds are used as internal plasticizers serve with equivalent weights from 800 to 1600. 4. Schaumartige Füllmasse nach Anspruch 1, d a -d u r c h g e k e n n z e i c h n e t , daß als innere Weichmacher präpolymere Isocyanate mit Isocyangehalten von 5 bis 15 % dienen. 4. Foam-like filling compound according to claim 1, d a -d u r c h g e k e It is noted that prepolymer isocyanates with isocyanate content are used as internal plasticizers serve from 5 to 15%.
DE19782847386 1978-10-30 1978-10-30 Cellular polyurethane filler for longitudinal sealing of cable - of electrical or optical communications type without reducing flexibility Withdrawn DE2847386A1 (en)

Priority Applications (1)

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DE19782847386 DE2847386A1 (en) 1978-10-30 1978-10-30 Cellular polyurethane filler for longitudinal sealing of cable - of electrical or optical communications type without reducing flexibility

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DE19782847386 DE2847386A1 (en) 1978-10-30 1978-10-30 Cellular polyurethane filler for longitudinal sealing of cable - of electrical or optical communications type without reducing flexibility

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DE2847386A1 true DE2847386A1 (en) 1980-05-08

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0047081A1 (en) * 1980-08-26 1982-03-10 International Standard Electric Corporation Telecommunication cable filled with foamed polyurethane composition
FR2544506A1 (en) * 1983-04-13 1984-10-19 Bretegnier Alain Extensible cord (lead), in the form of a helix, for optical fibres and process for manufacturing such a cord (lead)
JPS63196618A (en) * 1987-02-10 1988-08-15 Nippon Mektron Ltd Expandable composition for waterproof sealing of electric cable
WO1999064908A1 (en) * 1998-06-12 1999-12-16 Telefonaktiebolaget Lm Ericsson (Publ) An optofibre cable

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0047081A1 (en) * 1980-08-26 1982-03-10 International Standard Electric Corporation Telecommunication cable filled with foamed polyurethane composition
FR2544506A1 (en) * 1983-04-13 1984-10-19 Bretegnier Alain Extensible cord (lead), in the form of a helix, for optical fibres and process for manufacturing such a cord (lead)
JPS63196618A (en) * 1987-02-10 1988-08-15 Nippon Mektron Ltd Expandable composition for waterproof sealing of electric cable
JPH058943B2 (en) * 1987-02-10 1993-02-03 Nippon Mekutoron Kk
WO1999064908A1 (en) * 1998-06-12 1999-12-16 Telefonaktiebolaget Lm Ericsson (Publ) An optofibre cable
US6424769B1 (en) 1998-06-12 2002-07-23 Telefonaktiebolaget Lm Ericsson (Publ) Optofibre cable with concentric arrays of optical fiber tubes

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