WO2010139011A1 - Polymère présentant une performance au feu comprenant une composition de verre - Google Patents

Polymère présentant une performance au feu comprenant une composition de verre Download PDF

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Publication number
WO2010139011A1
WO2010139011A1 PCT/AU2010/000681 AU2010000681W WO2010139011A1 WO 2010139011 A1 WO2010139011 A1 WO 2010139011A1 AU 2010000681 W AU2010000681 W AU 2010000681W WO 2010139011 A1 WO2010139011 A1 WO 2010139011A1
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Prior art keywords
weight
phosphate glass
fire performance
fire
composition
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PCT/AU2010/000681
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English (en)
Inventor
Pulahinge Don Dayananda Rodrigo
Yi-Bing Cheng
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Ceram Polymerik Pty Ltd
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Priority claimed from AU2009902541A external-priority patent/AU2009902541A0/en
Application filed by Ceram Polymerik Pty Ltd filed Critical Ceram Polymerik Pty Ltd
Publication of WO2010139011A1 publication Critical patent/WO2010139011A1/fr

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    • 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
    • C09K21/00—Fireproofing materials
    • C09K21/02—Inorganic materials
    • 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
    • H01B7/29—Protection against damage caused by extremes of temperature or by flame
    • H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame

Definitions

  • This invention relates to a fire performance polymer composition, to articles formed of the fire performance polymer composition and methods of forming the composition and articles.
  • a material used to impart fire resistance has acceptable mechanical strength for the intended application, following exposure to the elevated temperatures likely to be encountered in a fire situation, so that it can remain in place when subjected to the mechanical shocks and/or forces (e.g. from strong gas currents) associated with fire scenarios.
  • a fire performance polymer composition comprising:
  • phosphate glass composition comprises (based on the weight of glass): 40% to 50% by weight phosphorous pentoxide;
  • a cable comprising a conductor and an insulating layer formed of a fire performance polymer composition described above.
  • the cable may, for example, comprise a conductor and an insulating layer applied onto the conductor by extrusion.
  • organic polymer does not include silicone polymers.
  • examples of organic polymers include polyolefins, ethylene-propylene rubber, ethylene- propylene terpolymer rubber (EPDM), chlorosulfonated polyethylene and chlorinate polyethylene, vinyl polymers, acrylic and methacrylic polymers, polyamides, polyesters, polyimides, polyoxymethylene acetals, polycarbonates, polyurethanes, natural rubber, butyl rubber, nitrile-butadiene rubber, epichlorohydrin rubber, polychloroprene, styrene polymers, styrene-butadiene, styrene-isoprene-styrene, styrene-butadiene-styrene, styrene-ethylene-butadiene-styrene, epoxy resins, polyester resins, vinyl ester resins, phenolic resins, melamine formaldehyde
  • silicate mineral includes aluminosilicates, magnesium silicates, calcium silicates and mixtures thereof.
  • the preferred silicate minerals are calcium silicates, magnesium silicates, and mixtures thereof. It is particularly preferred in order to optimise resistance that the silicate mineral component comprises no more than 5% by weight of the silicate mineral component of alkali aluminosilicates.
  • the composition contains a combination of phosphate glass and silicate mineral.
  • the phosphate glass having a composition of 40% to 50% by weight phosphorous pentoxide; 1.5% to 2.5% by weight barium oxide; 25% to 35% by weight zinc oxide; and alkali metal oxide in an amount of up to 15% by weight of the phosphate glass composition; melts in the heat generated during a fire to generate a liquid phase which in turn will react with the silicate mineral, particularly a silicate mineral selected from calcium silicate, magnesium silicate and mixtures thereof, to form a crystalline solid at moderately high temperatures (e.g. in the range of about 500 Q C to 900 Q C). In this way the fire performance polymer composition maintains good thermal insulation despite the high glass content.
  • Glasses conventionally used in fire barrier compositions need to be used in limited amounts because their use as a high proportion of the total inorganic materials can lead to fusion of the inorganic materials or severe shrinkage and distortion.
  • the phosphate glass composition is generally present as at least 20%, preferably 25% and more preferably at least 30% by weight of the inorganic components of the fire performance polymer composition.
  • the glass will typically be up to 70% of the inorganic components (such as up to 65% or up to 60%) by weight of the inorganic components of the fire performance polymer composition.
  • This relatively high proportion allows more effective interaction with the silicate mineral and yet, by virtue of the reaction with the silicate, severe distortion and shrinkage is avoided.
  • the interaction of glass and silicate provides a relatively strong ceramic residue of crush strength of the order of at least 1 MPa or more.
  • Another significant advantage of the fire performance polymer composition is the relatively low conductivity of the composition under fire conditions.
  • the transition of glass components to a liquid phase under fire conditions together with the loss of organic polymers often results in an increase in conductivity which can compromise the electrical insulation performance of insulating layers in cables and other electrical components.
  • the composition comprise no more than 5% by weight of the phosphate glass of alkali aluminosilicate and preferably the total of aluminosilicate and alkali aluminosilicate is no more than 5% by weight on the weight of the phosphate glass. It is also preferred that the phosphate glass composition comprise no more than 15% by weight of alkali oxide based on the total weight of phosphate glass.
  • the phosphate glass comprises in the range of from 5% to 15% by weight of alkali oxide based on the total weight of phosphate glass.
  • alkali oxide components which may be present in the phosphate glass are the oxides of at least one alkali metal selected from the group consisting of sodium, potassium and lithium (Na 2 O, Li 2 O and K 2 O).
  • Na 2 O, Li 2 O and K 2 O alkali metal oxide
  • the alkali metal oxide components also have the desirable effect of reducing the melting point of the phosphate glass composition.
  • the phosphate glass may be used in the fire performance polymer composition in any suitable form such as fibre frit or micro(nano)spheres.
  • the use of frit is particularly preferred.
  • the melting point of the phosphate glass is in the range of from 35O 0 C to 600 0 C (and preferably from 35O 0 C to 500 0 C).
  • the melting of the phosphate glass in this temperature range is preferred in this embodiment as the molten glass assists in maintaining the integrity of the insulating layer during the significant changes which occur during combustion of the organic polymer which generally commences at about 400 Q C.
  • the phosphate glass composition reacts with the silicate (particularly calcium and magnesium silicates) so that on elevation of the temperature under fire conditions the phosphate glass provides a transient liquid phase before being transformed into a solid at elevated temperature in the range of about 500 Q to 900 Q C (preferably in the range of from 500-700 0 C). This transformation from a softened glass to a partially crystallized one at moderate temperatures enables the ceramic residue to maintaining the structural integrity and dimensional stability at these temperatures.
  • the phosphate glass comprises the alkali metal oxide in an amount of from 8% to 12% by weight of the phosphate glass.
  • the phosphate glass composition may comprise further components in addition to the phosphorous pentoxide, barium oxide, zinc oxide and alkali metal oxide.
  • the phosphate glass comprise less than 5% by weight of the phosphate glass of the total of oxides of antimony, lead and arsenic (and preferably less than 1 % by weight of the phosphate glass of the total of oxides of antimony, lead and arsenic). Although such glass components have been reported as useful by others they are not required to achieve the advantageous properties of the fire performance polymer.
  • the fire performance polymer composition may comprise alumina (AI 2 O 3 ) as part of the phosphate glass composition.
  • the phosphate glass may for example further comprise alumina in an amount of up to 2% by weight of the total glass composition and preferably 1 to 2% by weight of the total phosphate glass composition.
  • the fire performance polymer composition may further comprise silica as part of the phosphate glass composition.
  • the phosphate glass may, for example, comprise silica in an amount of up to 2.5% by weight of the phosphate glass composition and preferably 1 to 2.5% by weight of the phosphate glass composition.
  • the fire performance polymer composition may further comprise one or both of boron oxide and bismuth oxide.
  • the phosphate glass composition may for example further comprise at least one or both of:
  • the composition may comprise an additional inorganic filler comprising an amount of up to 30% (preferably up to 20%) by weight of the total composition of at least one of metal (non alkali metal) hydroxides, metal (non alkali metal) oxides and metal (non alkali metal) carbonates.
  • a fire performance polymer composition may for example comprise least one further filler selected from the group consisting of calcium hydroxide, magnesium hydroxide, calcium carbonate and magnesium carbonate in a total amount in the range of from 1 % to 20% (and preferably from 5 to 20%) by weight of the total fire performance polymer composition.
  • Aluminium hydroxide has the same adverse effect and the fire performance polymer composition thus preferably comprises less than 5% aluminium hydroxide based on the total weight of the polymer composition.
  • compositions of the present invention may be incorporated into the compositions of the present invention.
  • these other components include lubricants, plasticisers, inert fillers (e.g. fillers that are not the metal oxides that can react and/or sinter with the other inorganic components, or their precursors), antioxidants, fire retardant materials, fiber reinforcing materials, materials that reduce thermal conductivity (e.g. exfoliated vermiculite), chemical foaming agents (which serve to reduce density, improve thermal characteristics and further enhance noise attenuation), and intumescing materials (to obtain a composition that expands upon exposure to fire or elevated temperature).
  • Suitable intumescing materials include natural graphite, unexpanded vermiculite or unexpanded perlite. Other types of intumescing precursors may also be used. The total amount of such additional components does not usually exceed 20% by weight based on the total weight of the composition.
  • intumescent agents such as phosphates (e.g. organic phosphates or nitrogen containing phosphates such as ammonium polyphosphate), melamine, polyols such as pentaerythritol and mixtures thereof.
  • Particulate materials which expand in a fire such as perlite and expandable graphite may also be useful in some embodiments.
  • Intumescing and/or expanding agents may be useful for example in gap filling applications where it is important to ensure a barrier is maintained in an intense fire.
  • the fire performance polymer compositions used in cable applications it may be preferred that the fire performance polymer composition maintain the dimensions of the uncombusted material and in this application organic intumescents may be deleterious although inorganic phosphates particularly ammonium polyphosphate may serve a useful role in maintaining shape and dimensions in accordance with the disclosure in our International Publication WO/2005/095545.
  • the composition of the invention comprises an organic polymer.
  • An organic polymer is one that has an organic polymer as the main chain of the polymer. Silicone polymers are not considered to be organic polymers, however, they may be usefully blended with the organic polymer(s), as a minor component of for example less than 50% based on the amount of organic polymer, preferably less than 20% and most preferably less than 5% based on the amount of organic polymer.
  • the organic polymer can be of any type, for example a thermoplastic polymer, a thermoplastic elastomer, a cross-linked elastomer or rubber, a thermoset polymer.
  • the organic polymer may be present in the form of a precursor composition including reagents, prepolymers and/or oligomers which can be reacted together to form at least one organic polymer of the types mentioned above.
  • the organic polymer can accommodate high levels of the inorganic components required to form the ceramic, whilst retaining good processing and mechanical properties. It is desirable in accordance with the present invention to include in the fire resistant compositions high levels of the inorganic components as such compositions tend to suffer reduced weight loss on exposure to fire when compared with compositions having lower levels of the inorganic components. Compositions loaded with relatively high concentrations of inorganic components are therefore less likely to shrink and crack when ceramified by the action of heat.
  • Organic polymers suitable for use with this invention include thermoplastic polymers, thermoset polymers, and (thermoplastic) elastomers.
  • the organic polymer component may comprise one or more selected from the group of polyolefins, ethylene-propylene rubber, ethylene-propylene terpolymer rubber (EPDM), chlorosulfonated polyethylene and chlorinate polyethylene, vinyl polymers, acrylic and methacrylic polymers, polyamides, polyesters, polyimides, polyoxymethylene acetals, polycarbonates, polyurethanes, natural rubber, butyl rubber, nitrile-butadiene rubber, epichlorohydrin rubber, polychloroprene, styrene polymers, styrene-butadiene, styrene- isoprene-styrene, styrene-butadiene-styrene, styrene-ethylene-butadiene-styrene, epoxy resins
  • the organic polymer chosen will in part depend upon the intended use of the composition. For instance, in certain applications a degree of flexibility is required of the composition (such as in electrical cable coatings) and the organic polymer will need to be chosen accordingly based on its properties when loaded with additives. Polyethylenes and ethylene propylene elastomers have been found to be particularly useful for compositions for cable coatings. Also in selecting the organic polymer account should be taken of any noxious or toxic gases which may be produced on decomposition of the polymer. The generation of such gases may be more tolerable in certain applications than others. Preferably, the organic polymer used is halogen-free.
  • the upper limit for the amount of polymeric components in the fire resistant composition tends to be influenced by the desired properties of the formulated composition. If the amount of the polymeric components exceeds about 60% by weight of the overall composition, it is unlikely that a cohesive, strong residue will be formed during a fire situation.
  • alkali metal oxides comprising at least one selected from the group consisting of Na 2 O, Li 2 O and K 2 O.
  • the invention provides a cable comprising at least one elongated functional element such as a conductor and at least one coating layer comprising the hereinbefore described fire performance polymer composition.
  • the cable comprises a single insulation coating and the single insulation coating is formed of the fire performance polymer composition composition.
  • the inner surface of the fire performance polymer composition layer may abut the functional element (such as one or more copper wires) and preferably the outer surface of the layer is free of further coatings or layers.
  • the fire performance polymer composition layer is preferably applied to the at least one functional element by extrusion.
  • composition of the invention provides a combination of fire protection and sufficient strength, on exposure to an elevated temperature experienced under fire conditions, to allow cables to be prepared using a single insulating layer of the fire performance polymer composition.
  • the commercially available cables with high fire rating generally require a physical supporting and sealing layer to maintain the integrity of the insulating layer.
  • such layers may be used with the composition of the invention, they are generally not required to provide a high fire rating.
  • compositions of the present invention may be provided in a variety of different forms, including:
  • the composition may be fabricated into these products using standard polymer processing operations, e.g. extrusion, moulding (including hot pressing and injection moulding).
  • the products formed can be used in passive fire protection systems.
  • the composition can be used in its own right, or as a laminate or composite with another material (for example, plywood, vermiculite board or other).
  • the composition may be extruded into shapes to make seals for fire doors. In the event of a fire, the composition is converted into a ceramic thus forming an effective mechanical seal against the spread of fire and smoke.
  • passive fire protection applications include but are not limited to firewall linings for ferries, trains and other vehicles, fire partitions, screens, ceilings and linings coatings for building ducts, gap fillers (i.e. mastic applications for penetration), structural fire protection [to insulate the structural metal frame of a building to allow it to maintain its required load bearing strength (or limit the core temperature) for a fixed period of time], fire door inserts, window and door seals, intumescent seals, and compounds for use in electrical boxes, in fittings, straps, trays etc that are attached to or used to house cables or similar applications.
  • firewall linings for ferries, trains and other vehicles include but are not limited to firewall linings for ferries, trains and other vehicles, fire partitions, screens, ceilings and linings coatings for building ducts, gap fillers (i.e. mastic applications for penetration), structural fire protection [to insulate the structural metal frame of a building to allow it to maintain its required load bearing strength (or limit the core temperature) for
  • the material When totally subject to fire, the material will transform to a ceramic, thereby protecting enclosed or separated areas. When partially subjected to fire, it may be desirable for a portion of the material to transform to ceramic, being held in place by the surrounding material that has not transformed to a ceramic.
  • Applications in the transport area may include panelling (e.g. in glass fibre reinforced thermoplastic or thermoset composites), exhaust, engine, braking, steering, safety devices, air conditioning, fuel storage, housings and many others. Applications in defence would include both mobile and non- mobile weapons, vehicles, equipment, structures and other areas. Applications in the machinery area may include bearings, housing barriers and many others.
  • the compositions of the present invention are especially useful as coatings for the production of cables for example they can be used for insulation or sheathing layers. The compositions are therefore suitable for the manufacture of electrical cables that can provide circuit integrity in the case of fire.
  • the fire performance polymer composition may be applied by conventional means such as extrusion. This extrusion of the fire performance polymer composition may be carried out in a conventional manner using conventional equipment.
  • the thicknesses of the layers of insulation will depend upon the requirements of the particular standard for the size of conductor and operating voltage. Typically the insulation will have a total thickness from 0.6 to 3 mm. For example, for a 35 mm 2 conductor rated at 0.6/1 kV to Australian Standards would require an insulation thickness of approximately 1.2 mm.
  • the cable may include other layers such as a cut- resistant layer and/or sheathing layer. Furthermore, on exposure to elevated temperature experienced under fire conditions the compositions typically yield residue which is coherent and has good mechanical strength, even after cooling.
  • compositions in accordance with the present invention may also exhibit the required electrical insulating properties at elevated temperatures.
  • the ceramic formed on exposure of compositions of the present invention to an elevated temperature experienced under fire conditions has a flexural strength of at least 0.3 MPa, preferably at least 1 MPa and more preferably at least 2 MPa. It is a distinct advantage that the compositions are self-supporting, i.e. they remain rigid and do not undergo heat.
  • Figure 1 is a perspective view of a particularly preferred embodiment of the cable of the invention in which the composition of the invention forms a single insulating layer about a conductive element.
  • Figure 2 is a perspective view of a fire performance article.
  • Figure 3 is a graph showing the variation in pH of liquors prepared from a series of glasses by heating 2g of each glass in 50 ml of distilled water and titrated with 0.001 N hydrochloric acid solution in accordance with Example 1.
  • Figure 4 is a graph showing the variation of strength with sintering temperature for a range of compositions detailed in Example 2.
  • Figure 5 is a graph showing the variation of shrinkage with sintering temperature for a range of compositions detailed in Example 2.
  • Figure 1 shows the simple cable design which may be used with the fire performance polymer composition.
  • the fire performance polymer composition forms an extruded insulation layer 2 about the conductor (1 ).
  • the inner surface 2A of the insulation layer abuts the conductor and the outer surface 2B is free of further coatings.
  • Figure 2 shows a possible design for a fire performance article.
  • the metal substrate 12 has a protective coating 16 of the fire performance polymer formed on the metal substrate by extrusion.
  • a fire performance polymer composition is self- supporting.
  • the test involves specimens of nominal dimensions 30 mm x 13 mm x 2 mm (approximately) made from the composition which are placed on a rectangular piece of refractory so that their long axis is perpendicular to one edge of the supporting refractory block and a 13 mm long portion of each specimen is projecting from the edge of the supporting refractory block.
  • the specimens are then heated at 12 Q C per minute to 1000 Q C and maintained at this temperature for 30 minutes in air. At all temperatures, the specimens of composition remain rigid and coherent without bending over the edge of the supporting block to a significant degree (i.e. providing a bending angle to the original position of less than 15 degrees).
  • the resulting ceramic will preferably retain the shape the specimen had prior to exposure to elevated temperatures.
  • Example 1 Three groups of glasses of compositions given in Tables 1 , 2 and 3 were prepared by mixing the raw materials in the required proportions and melting in platinum crucibles at 1100-1200 0 C in an electric furnace. On completion of melting which required an exposure at the maximum temperature for about 1 hour, the glass melts were quenched in cold water to obtain fragments of approximately 0.5-5mm in size. They were then oven dried for about 12hrs at 105 0 C and ground into fine powders passing through a 200 mesh sieve using an agate mortar and pestle.
  • Glass powder compacts of approximately 14.1 mm diameter and 5mm thickness were made by uniaxial pressing moistened glass powder under a load of -2000N.
  • the powder compacts were oven dried for about 12hrs at 105 0 C and sintered at one or more temperatures of 350, 375, 400, 420, 450, 475, 500, 525, 575 and 625 0 C.
  • the heating rate was 270-300°C/h and the holding time at the maximum temperature was 30min.
  • After cooling down slowly to the room temperature they were visually examined for evidence of melting during sintering and the visual observations were confirmed by examining the microstructure using both optical and electron microscopy. All glasses except glass A1 re-melted at a temperature less than or equal to 600 0 C.
  • Glasses were tested for their solubility in water using 2g samples of crushed glass particles having a size range from 0.3 to 0.5mm. Each glass sample was heated to 98 Q C in 50ml of distilled water in a beaker and maintained at that temperature for 1 h using a hot water bath. After cooling down to room temperature and filtering to remove the glass particles, 25ml of the liquor obtained was titrated against a 0.001 N HCI solution and the change in pH of the mixture was recorded as a function of the amount of HCL solution added. The HCL solution was added at a rate of ⁇ 1 ml/min and the mixture was stirred continuously using a magnetic stirrer. A bottle glass and a commercially available glass labelled #3 were also tested in the same manner for comparison.
  • Figures 3 shows that the pH of liquors prepared using all new low melting phosphate glasses was neutral (i.e. close to 7) and decreased with the addition of HCI solution indicating that there was no any dissolved ion to neutralise the acid added.
  • the liquor obtained by boiling bottle glass and glass #3 in water had initial pH values in excess of 9.
  • HCI solution was added the pH of the mixture decreased progressively. This indicates that both bottle glass and glass #3 used for comparison had released a substantial amount of alkali ions into water.
  • This example examines the behaviour of the inorganic components of the invention to simulate the composition remaining on combustion of the organic polymer.
  • Binary inorganic mixtures containing 33.3% glass frit CO (chemical composition shown in Example 1 ) were prepared in which the balance of inorganic material was as was selected from Talc, magnesium hydroxide (MDH), Wollastonite (WoII) calcium silicate, clay (an aluminosilicate), Zinc Borate (ZnB), calcium carbonate (CaCO 3 ) and aluminium hydroxide (ATH) in accordance with the heading of each column in the tables below.
  • MDH magnesium hydroxide
  • WoII Wollastonite calcium silicate
  • clay an aluminosilicate
  • Zinc Borate ZnB
  • CaCO 3 calcium carbonate
  • ATH aluminium hydroxide
  • Pellets of the compositions were made by uniaxial pressing the composition to 14.05 mm diameter and ⁇ 6-8mm thickness (high) under a 2OkN load.
  • compositions were sintered for 30 min at the temperatures shown in the table and the dimensions and compressive load to fracture of the pellets were measured. Dimensions were measured using a venire calliper and the load to fracture was measured using an lnstron testing machine. Shrinkage and compressive strength were calculated from the above measurements.
  • Glass frit and ZnB mixture developed the highest strength at 600 and 800 0 C, but formed a low viscous liquid at 1000 0 C.
  • This example illustrates the preparation of a fire performance polymer composition of the invention and forming an article thereof.
  • a compound of the invention is prepared using EPDM (Ethylene Propylene Diene Terpolymer - Nordel IP 3745), glass frit CO (chemical composition shown in Example 1 ), calcium silicate mineral (wollastonite - NYAD 400) and calcium carbonate (Omyacarb 2T).
  • the composition of the compound is given in Table 1.
  • Compounding of the polymer with the fillers is done by mixing the materials in a Haake Rheochord 600 internal mixer. The processing temperature is between 160 to 170 Q C. The polymer pellets are inserted into the mixing chamber and blended for about 3 min, increasing the rotor speed gradually from 10 to about 30 rpm. The filler mixture is then added progressively with small additions at a time and continued to mix for additional 15min.
  • the polymer blend On completion of mixing the polymer blend is removed from the mixer and pressed into a flat sheet of about 2mm thickness by hot pressing at approximately 170 Q C for 15min under a pressure of approximately 7 MPa. Complete filling of the die cavity during hot pressing at such a low pressure as 7 MPa and absence of any cracks or other visible defects will indicate that the polymer composition is suitable for making articles by conventional polymer processing methods such as extrusion.
  • Example 4 Compounds of the invention with the compositions given in Table 2 were prepared by mixing the polymer with the fillers in a Haake Rheochord 600 internal mixer. The processing temperature was between 160 to 170 Q C. Each compound and specimens thereof were prepared as described below.
  • the polymer pellets were inserted into the mixing chamber and blended for about 3 min, increasing the rotor speed gradually from 10 to about 30 rpm.
  • the filler mixture was then added progressively with small additions at a time and continued to mix for additional 15min.
  • the polymer blend was removed from the mixer and pressed into a flat sheet of about 2mm thickness by hot pressing at approximately 170 Q C for 15min under a pressure of approximately 7 MPa.
  • Table 2 Fire performance polymer compositions Em1 , Em2, Em3 and Em4 (weight %).
  • Table 3 Change in dimensions and strength of ceramic formed by firing Em1 , Em2, Em3 and Em4 at 500, 700 and 950 0 C.
  • compositions Em5, Em6 and Em7 were prepared in a manner similar to those given in Table 2 under Example 4.
  • the processing temperatures for Em5, Em6 and Em7 were 195, 155 and 17O 0 C respectively.
  • Composition Em7 was prepared by manually mixing at room temperature in a glass container. A flat sheet of about 2mm thickness was made by curing the blend at 5O 0 C in a steel mould under a pressure of approximately 7 MPa.
  • Table 4 Fire performance polymer compositions Em5, Em6 and Em7 (weight %).
  • Table 5 Change in dimensions and strength of ceramic formed by firing Em5, Em6 and Em7 at 500, 700 and 950 0 C.

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Fireproofing Substances (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Insulated Conductors (AREA)

Abstract

L'invention porte sur une composition de polymère présentant une performance au feu comprenant : (a) 15 % à 60 % en poids de la composition de polymère d'un polymère organique; (b) 15 % à 40 % en poids de la composition de polymère d'une composition de verre de phosphate; (c) 15 % à 40 % en poids de la composition de polymère de matière minérale au silicate; la composition de verre de phosphate comprenant (sur la base du poids du verre) : 40 % à 50 % en poids de pentoxyde de phosphore; 1,5 % à 2,5 % en poids d'oxyde de baryum; 25 % à 35 % en poids d'oxyde de zinc; et un oxyde de métal alcalin en une quantité allant jusqu'à 15 % en poids de la composition de verre de phosphate.
PCT/AU2010/000681 2009-06-03 2010-06-02 Polymère présentant une performance au feu comprenant une composition de verre WO2010139011A1 (fr)

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AU2009902541A AU2009902541A0 (en) 2009-06-03 Fire performance polymer comprising glass composition

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CN102277653A (zh) * 2011-07-05 2011-12-14 东华大学 一种阻燃抗熔滴聚酯复合纤维的制备方法
CN102746585A (zh) * 2012-06-12 2012-10-24 安徽华海特种电缆集团有限公司 一种聚丙烯绝缘电缆料及其制备方法
WO2013023118A1 (fr) * 2011-08-10 2013-02-14 General Cable Technologies Corporation Câble sans plomb contenant un composé du bismuth
CN103524800A (zh) * 2013-09-30 2014-01-22 芜湖航天特种电缆厂 一种电线电缆用耐曲挠护套料及其制备方法
CN104194072A (zh) * 2014-08-26 2014-12-10 安徽蓝德集团股份有限公司 一种高拉伸强度耐磨稀土氧化物电缆料
CN104629135A (zh) * 2015-01-27 2015-05-20 安徽德源电缆集团有限公司 一种改性氯磺化聚乙烯电缆护套材料
JP2020007534A (ja) * 2018-06-27 2020-01-16 日東電工株式会社 難燃性塗膜

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WO2013023118A1 (fr) * 2011-08-10 2013-02-14 General Cable Technologies Corporation Câble sans plomb contenant un composé du bismuth
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CN103524800B (zh) * 2013-09-30 2016-03-30 芜湖航天特种电缆厂 一种电线电缆用耐曲挠护套料及其制备方法
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