EP1377635A4 - Composition ignifuge anti-abrasive - Google Patents

Composition ignifuge anti-abrasive

Info

Publication number
EP1377635A4
EP1377635A4 EP02721203A EP02721203A EP1377635A4 EP 1377635 A4 EP1377635 A4 EP 1377635A4 EP 02721203 A EP02721203 A EP 02721203A EP 02721203 A EP02721203 A EP 02721203A EP 1377635 A4 EP1377635 A4 EP 1377635A4
Authority
EP
European Patent Office
Prior art keywords
composition
fire retardant
abrasive
weight percent
fire
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Withdrawn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
EP02721203A
Other languages
German (de)
English (en)
Other versions
EP1377635A2 (fr
Inventor
David E Tweet
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.)
Tandem Products Inc
Original Assignee
Tandem Products Inc
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 Tandem Products Inc filed Critical Tandem Products Inc
Publication of EP1377635A2 publication Critical patent/EP1377635A2/fr
Publication of EP1377635A4 publication Critical patent/EP1377635A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • C09K21/14—Macromolecular materials
    • 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
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/04—Carbon
    • 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
    • C08K5/49—Phosphorus-containing compounds
    • C08K5/51—Phosphorus bound to oxygen
    • C08K5/52—Phosphorus bound to oxygen only
    • C08K5/521—Esters of phosphoric acids, e.g. of H3PO4
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
    • C04B2235/422—Carbon
    • C04B2235/425—Graphite

Definitions

  • the present invention relates to anti-abrasive fire retardant compositions, more particularly to plastisol or urethane elastomer systems which may include effective amounts of fire retardant plasticizers, metallic compounds, ceramic elements and/or char forming graphite, the compositions being especially well suited for wear applications, such as lining material handling equipment and the like.
  • Nickel-hardened steel alleged to be non-burning, lacks an acceptable level of abrasion resistance, particularly when compared to available and widely used urethane elastomer products, such as Rhino-Hyde® and Kryptane®, and ceramic tiles. Aside from other economic considerations, the cost associated with maintenance and replacement of nickel hardened steel, let alone the "cost" of equipment and processing down time, is overly burdensome for the majority of material handling applications.
  • the ceramic material available for liner tiles is especially brittle, being particularly susceptible to chipping and breakage when directly affixed to a rigid structural substrate, as is almost always the manner in which such tiles are utilized in material handling applications. Premature tile failure frequently occurs in material handling applications where, in addition to surface sliding, surface impacts are present.
  • elastomeric lining materials i.e., chute lining elastomers
  • elastomeric lining materials which generally lack the supreme abrasion resistance of ceramic material, combine sufficient abrasion resistance with advantageous impact cushioning, they, by their very nature, are known to contribute fuel to the very fires that the industry seeks to reduce and eliminate.
  • the grain feed and flour milling industries have desired a fire-retardant urethane composition suitable for lining bulk handling equipment for upwards of twenty years .
  • Urethane elastomer systems can be made fire retardant by the incorporation of massive amounts of a fire retarding additive agent, such as aluminum tri-hydrate.
  • a fire retarding additive agent such as aluminum tri-hydrate.
  • the amount of such fire retardant additive agent typically and prohibitively approaches, and often times exceeds, fifty weight percent of the total composition.
  • Adding fifty percent of an inert, non- performing raw material makes the polymer almost impossible to handle without the abrasion resistant characteristics normally associated with urethane elastomeric products. Needless to say, the advantage of improved fire retardation at the "cost" of reduced or diminished abrasion resistance was not a viable solution, and as such was not well received.
  • an anti-abrasive fire retardant composition namely those comprising a plastisol binder, a polyurethane modified plastisol binder or system, or a pure urethane system modified to induce fire- retardancy.
  • the instant compositions of the subject invention are characterized as including a phosphate ester plasticizer, and further optionally including, alone or in combination, metallic compounds or intumescent graphite flake. It is likewise contemplated to include/incorporate (e.g., bind) ceramic (Al 2 0 3 ) chips into base formulations of the subject invention to greatly enhance the abrasive character of the resulting composition or panels so fabricated.
  • composition Formulations provides a listing of composition constituents for the tested composition formulations
  • TABLE 8 Physical Properties, provides a listing of select physical properties for the compositions of TABLES 3-7 relative to ultrahigh molecular weight polyethylene;
  • FIGS. 1A-1C depict heat release rate, specific extinction area, and carbon monoxide, respectively, as a function of time for the urethane 5.1 control;
  • FIGS. 2A-2C depict heat release rate, specific extinction area, and carbon monoxide, respectively, as a function of time for the urethane 5.2 control
  • FIGS. 3A-3C depict heat release rate, specific extinction area, and carbon monoxide, respectively, as a function of time for the ultra high molecular weight polyethylene control
  • FIGS. 4A-4C depict heat release rate, specific extinction area, and carbon monoxide, respectively, as a function of time for illustrative composition formulation 1;
  • FIGS. 5A-5C depict heat release rate, specific extinction area, and carbon monoxide, respectively, as a function of time for illustrative composition formulation 1C;
  • FIGS. 6A-6C depict heat release rate, specific extinction area, and carbon monoxide, respectively, as a function of time for illustrative composition formulation 21;
  • FIGS. 7A-7C depict heat release rate, specific extinction area, and carbon monoxide, respectively, as a function of time for illustrative composition formulation 21C;
  • FIGS. 8A-8C depict heat release rate, specific extinction area, and carbon monoxide, respectively, as a function of time for illustrative composition formulation 22;
  • FIGS. 9A-9C depict heat release rate, specific extinction area, and carbon monoxide, respectively, as a function of time for illustrative composition formulation 22C.
  • the subject anti-abrasive fire retardant composition namely those which comprise a plastisol binder, a polyurethane modified plastisol binder or system, or a pure urethane system modified to induce fire-retardancy. It is likewise contemplated to include/incorporate (e.g., bind) ceramic (A1 2 0 3 ) chips into base formulations of the subject invention to greatly enhance the abrasive character of the resulting composition or panels so fabricated. Specifics of this composition feature will be subsequently developed.
  • a basic plastisol formulation is preferred in which a high performance polyvinyl chloride (PVC) dispersion resin is combined with fire- retardant plasticizers, preferably but not necessarily FDA approved plasticizers.
  • PVC polyvinyl chloride
  • metallic compounds may be added in effective amounts to more greatly attain the sought after fire stop qualities.
  • a borax (i.e., zinc borate) fire retardant powder may be added up to a concentration of about 15 wt% .
  • an aluminum trihydrate may be added to the basic plastisol formulation to a concentration of up to about 25 wt%.
  • borax and aluminum trihydrate may be added up to a total concentration of about 30 wt% of the basic plastisol formulation.
  • the aforementioned four plastisol base formulations can. be modified with a urethane elastomeric system.
  • the basic principle is to add the polyol portion of the urethane system to the above plastisol formulations.
  • the pre-polymer Prior to product use, the pre-polymer is then added to the modified plastisol and the process to manufacture the product proceeds as in the case of the plastisol.
  • the polyol used to cure the urethane pre-polymer also functions as a plasticizer and becomes an integral part of the cured plastisol system.
  • the level of urethane modification can be up to 50 wt%. The greater the concentration of urethane modification, the greater the tendency of the product to drip on burning and the less fire-retardant the system becomes, however, the abrasion resistance of the product is significantly improved.
  • a pure urethane system such as those commercially available from Tandem Products, Inc., Minneapolis, MN, USA, namely their line of Rhino Hyde® products, may be modified to induce fire-retardancy .
  • a high performance abrasion resistant urethane elastomer system may be modified via the introduction of an expandable char forming graphite material.
  • fire retardant plasticizers may be included, more particularly, the urethane elastomeric system may be modified with the fire retardant plasticizers and the inclusion one or more metallic compounds (e.g., borax and/or aluminum trihydrate) . Processing of such compositions proceeds as previously outlined, however, the cure is completed at approximately 200-250°F rather than at about 400°F.
  • Performance test data relating to both the fire retardant and abrasion resistant character of the compositions of the subject invention, and several controls, are summarized in TABLE 1, Test Summary: Illustrative Formulation Composition vs. Controls.
  • Figures 1-10 graphically illustrate select ASTM E 1354-90 test findings or properties, namely heat release, specific extinction area, and carbon monoxide, all as a function of time, for those select formulations of TABLE 1.
  • TABLES 2-7 Illustrative formulations for the tested anti-abrasive fire retardant composition of the subject invention are presented in TABLES 2-7, Illustrative Composition Formulations (ICF) , more particularly, a summary of select or group test formulations from TABLE 1 is provided in TABLE 2, whereas TABLES 3-7 are each directed to specific later occurring formulations of TABLE 1.
  • TABLE 8 Physical Properties, provides a listing of select physical properties for the specific later occurring compositions of TABLE 1, namely those formulations of TABLES 3-7, relative to ultrahigh molecular weight polyethylene.
  • ASTM D 2863-97 Standard Test Method for Measuring the Minimum Oxygen Concentration to Support Candle-Like Combustion of Plastics (Oxygen Index) , " incorporated herein by reference, covers a fire-test-response procedure and provides for the measuring of the minimum concentration of oxygen in a flowing mixture of oxygen and nitrogen that will just support flaming combustion of plastics .
  • ASTM E 1354-90 Standard Test Method for Heat and Visible Smoke Release Rates from Materials and Products using an Oxygen Consumption Calorimeter
  • ASTM E 1354-90 Standard Test Method for Heat and Visible Smoke Release Rates from Materials and Products using an Oxygen Consumption Calorimeter
  • This test method is used to determine the ignitability, heat release rates, mass loss rates, effective heat of combustion, and visible smoke development of materials and products.
  • the rate of heat release is determined by measurement of the oxygen consumption as determined by the oxygen concentration and the flow rate in the exhaust products stream.
  • the effective heat of combustion is determined from a concomitant measurement of specimen mass loss rate, in combination with the heat release rate.
  • Smoke development is measured by obscuration of light by the combustion product stream. It is further noted that the rate of heat release is one of the most important variables, in many cases the single most variable, in determining the hazard from a fire .
  • Time to ignition is simply the time in seconds that the sample must be heated at a specific heat flux before it bursts into a flame.
  • the heat flux i.e., heat input into the sample
  • the heat flux may be varied over a wide range, from 10-100 kilowatts per square meter. Higher heat fluxes typically give shorter times to ignition. Fire safety is improved by using materials with high (i.e., long) times to ignition.
  • Rate of heat release is a measurement of how much heat a material produces once it is burning, and how fast the heat is evolved. Often the RHR changes as the material burns, increasing to a maximum once it "gets going" and then tapering off.
  • the peak rate of heat release is the highest value obtained during the burn, and is considered by many fire scientists to be the most critical parameter to fire safety, as it answers the question "how big is the fire”. It is desirable to have a low peak RHR and to have the peak occur as late as possible in the burning process. A low average RHR is also desirable.
  • the sum of the heat released by a material over the course of a burn is called the total heat released and is proportional to the average RHR.
  • SEA Specific extinction area
  • ASTM D 4060-95 "Standard Test Method for Abrasion Resistence of Organic Coatings by the Taber Abraser," incorporated herein by reference, covers the termination of the resistence of organic coatings to abrasion produced by the Taber Abraser on coatings applied to a plain, rigid surface, such as a metal panel.
  • the test method generally requires the organic material to be applied at a uniform thickness to a plain, ridged panel and, after curing, the surface is abraded by rotating the panel under weighted abrasive wheels.
  • Abrasion resistence is then calculated as loss in weight at a specified number of abrasion cycles (i.e., loss in weight per cycle) , or as a number of cycles required to remove a unit amount of coating thickness.
  • ICFs illustrative composition formulations
  • the ICFs are identified as follows: 1, 1C, 21, 21C, 22, 22C, 37, 37C, RH FRP-800, RH FRP- 700, RH FRP-800 HE, RH FRP-700 HE, and Ultraslide FRP 95.
  • the formulation of each of these tested compositions are either summarized, TABLE 2, or separately presented herewith (TABLES 2-7) .
  • test compositions may be fairly categorized as comprising either a vinyl plastisol (e.g., ICFs 1, 1C, 21, 21C, 22, 22C, 37, 37C) or as comprising a urethane elastomer system (e.g., RH FRP-800, RH FRP-700, RH FRP-800 HE, RH FRP- 700 HE, and Ultraslide FRP 95) .
  • a vinyl plastisol e.g., ICFs 1, 1C, 21, 21C, 22, 22C, 37, 37C
  • a urethane elastomer system e.g., RH FRP-800, RH FRP-700, RH FRP-800 HE, RH FRP- 700 HE, and Ultraslide FRP 95
  • each category of composition further includes at least a single fire retardant plasticizer (e.g., all ICFS but 1/lC) , and may selectively include at least one metallic compound (e.g., ICFS 21/21C, or 22/22C) , or expandable char forming graphite material (e.g., all urethane based ICFS) .
  • a single fire retardant plasticizer e.g., all ICFS but 1/lC
  • metallic compound e.g., ICFS 21/21C, or 22/22C
  • expandable char forming graphite material e.g., all urethane based ICFS
  • ICFS 1 and 37 omit from the organic formulation the inorganic fire retardant additives aluminum trihydrate and zinc borate, with IFC 1 further omitting a fire retardant plasticizer, and IFC 37 omitting a secondary plasticizer from the composition.
  • ICFS 21 and 22 have equivalent general compositions, however, each contain different fire retarding plasticizing agents, as noted.
  • composition designations include about approximately the same mass of PVC resin.
  • preferred compositions as evidenced by the performance test results, is that of IFC 21/21C.
  • the ceramic constituent of the subject ICFS is on the order of about 50 to 70 wt% of the composition.
  • the organic constituent is preferably a plastisol formulation comprising a PVC resin, ideally present in a quantity to comprise about 35 to 65 wt% of the composition.
  • the formulation further includes a fire retardant plasticizer, preferably a phosphorous containing plasticizer, more particularly a 2- ethylhexyl diphenyl phosphate or a triaryl phosphate ester.
  • the ceramic constituent it preferably comprises A1 2 0 3 particles having a thickness in the range of about ⁇ /i6 to ⁇ /8 of an inch.
  • Commercial embodiments of the composition may be backed with fabric, expanded metal or solid metal. Sheet materials are contemplated, with panels for instance being about four feet by ten feet and about ⁇ / ⁇ inch thick.,
  • a preferred composition includes a PVC based resin which incorporates fire retardant additives, with a reduced amount of organic material being significantly off-set with the addition of ceramic elements or chips.
  • the basic composition of the fire stop material includes approximately 35 wt% liquid organic binder material which functions to, among other things, hold the ceramic chips together (i.e., form a cohesive ceramic chip matrix) .
  • the liquid binder material may be one of several formulations as is supported by TABLE 2.
  • the balance, approximately 65 wt%, are ceramic chips, which have been primed and coated with a prime to increase the adhesion between the organic liquid binder and the ceramic chips .
  • Sheets of the basic composition include an expanded metal backing of 13-16 gauge flattened expanded metal, with openings from ⁇ / ⁇ to inch.
  • the expanded metal sheet may be washed, plasticized and primed to increase adhesion to the composite material.
  • the fire stop sheet may be made into many different sizes and thicknesses, the most common size sheets are 4 feet wide by 10 feet long, or 5 feet wide by 10 feet long. Sheet thicknesses preferably can vary between 1/4 to inch, with thicker or thinner sheets possible, such parameter being application specific, and ultimately a matter of practicality.
  • approximately 1/3 of the organic liquid binder material is poured onto a flat surface and is allowed to flow or spread in an even layer.
  • the primed ceramic chips are distributed evenly throughout the mold surface.
  • the balance of the organic liquid binder material is then distributed evenly over the ceramic chips, such that the binder material completely covers same.
  • the expanded metal is then placed on top of the mix and is slightly submerged in the liquid binder material.
  • a weight can be placed on top of the expanded metal to ensure intimate contact with the organic binder material.
  • the composite material is then heated to approximately 400°F until the composite is partially cured.
  • a cure can be defined as a cure sufficient to allow the composite sheet to be lifted from the mold and placed in a jig for subsequent cure.
  • the cure of the fire stop composite may be completed by one of the following three methods: (1) placing the pre-stage sheet in an air oven at approximately 450°F for 15-30 minutes; (2) allowing the sheet to continue to cure on the heated table for approximately 30 minutes at 400°F; or, (3) dip the staged composite sheet in molten salt at approximately 430°F for up to 4 minutes.
  • compositions of this type are nonetheless far more difficult to work with for maintenance mechanics and fabricators when compared to known abrasion resistant sheets of pure urethane without ceramic chips.
  • a 100% pure urethane elastomer is utilized, with or without ceramic chips, which substantially achieves the abrasion resistant characteristics of heretofore known non-modified urethane elastomers .
  • the urethane elastomer composition of the subject invention preferably but not necessarily includes a fire retardant phosphate ester plasticizer and an expandable charring/foaming graphite material.
  • a fire retardant phosphate ester plasticizer and an expandable charring/foaming graphite material.
  • other performance test parameter values indicate attainment of the sought after threefold advantage, namely abrasion resistance, fire retardant character, and non-flowing quality when subjected to an open flame.
  • the phosphate ester plasticizer and the charring graphite are present in equal proportion or relation, in the range of about 2-10 wt% each.
  • the fire retarding plasticizer reduces the flamability of the urethane elastomer and the expandable graphite material encapsulates the urethane composition in such a way that when flame impinges directly on the elastomer, it foams up but does not drip.
  • the foam char prevents oxygen and/or heat from burning the urethane elastomer.
  • the fire retardant plasticizer may be omitted (i.e., be 0 wt% of the composition) , it is further advantageously included to assist in "thinning" a mixture comprising the combination of the urethane and the graphite.
  • the ICFS generally comprise from about 25 wt% prepolymer (RH FRP-700) to about 50 wt% prepolymer (Ultraslide FRP 95), the prepolymer generally being a combination of isocyanate and polyols.
  • the balance by weight is generally shown as being a curative, more particularly a mixture of designated polyol, 1, 4, butanediol, graphite material (e.g., UCAR 220-50N: GrafGuardTM grade 220-50 which is an intumescent graphite flake that begins to show significant expansion near 220°C) , and a phosphorous flame retardant (e.g., Reofos® 50/Sant 141).
  • UCAR 220-50N GrafGuardTM grade 220-50 which is an intumescent graphite flake that begins to show significant expansion near 220°C
  • a phosphorous flame retardant e.g., Reofos® 50/Sant 141).
  • Isocyanates ($/lb.) Weights Weights 59.18 Isonate 125M (MDI) 1.220 125.5 1.1800 2.0 3.187 80.00 1273.4
  • NCO Index/Stoichiometry 1.020 0.980 Batch size: 236 764 1000 Cost ($/lb.): 1.376 1.758 1.668 Weight ratio: 1 3.243 Volume ratio 1 3.928
  • Catalyst Type Cost ($/lb.): 1.241 1.005 1.124
  • Catalyst Level 1 drop Sheets Cat & 1 drop 33LV Weight ratio: 1 0.985

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (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)

Abstract

Cette invention se rapporte à plusieurs modes de réalisation généraux d'une composition ignifuge anti-abrasive, notamment ceux qui comprennent un liant au plastisol, un liant ou un système de plastisol modifié par polyuréthane ou un système d'uréthane pur modifié pour produire un effet ignifuge. Ces compositions se caractérisent de préférence en ce qu'elles contiennent un plastifiant à l'ester de phosphate et éventuellement, seuls ou associés entre eux, des composés métalliques ou des flocons de graphite intumescents. On prévoit également d'inclure/incorporer (par exemple par liaison) des éclats de céramique (Al2O3) dans les formulations de base faisant l'objet de cette invention, pour améliorer considérablement le caractère abrasif de la composition qui en résulte ou des panneaux fabriqués avec cette composition.
EP02721203A 2001-02-26 2002-02-26 Composition ignifuge anti-abrasive Withdrawn EP1377635A4 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US27147701P 2001-02-26 2001-02-26
US271477P 2001-02-26
PCT/US2002/006012 WO2002068061A2 (fr) 2001-02-26 2002-02-26 Composition ignifuge anti-abrasive

Publications (2)

Publication Number Publication Date
EP1377635A2 EP1377635A2 (fr) 2004-01-07
EP1377635A4 true EP1377635A4 (fr) 2005-06-01

Family

ID=23035747

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02721203A Withdrawn EP1377635A4 (fr) 2001-02-26 2002-02-26 Composition ignifuge anti-abrasive

Country Status (3)

Country Link
EP (1) EP1377635A4 (fr)
AU (1) AU2002252145A1 (fr)
WO (1) WO2002068061A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007061503A1 (de) * 2007-12-18 2009-06-25 Henkel Ag & Co. Kgaa Flammfeste Plastisole enthaltend Blähgraphit
WO2010034109A1 (fr) * 2008-09-26 2010-04-01 Quantum Technical Services Ltd. Revêtement ignifuge

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2547555A1 (de) * 1975-10-23 1977-04-28 Kz Vnii Sintetitscheskoyo Kaut Thermostabile urethanelastomere und mischungen auf deren basis
US4206102A (en) * 1976-09-15 1980-06-03 Mobay Chemical Corporation Method of producing polyurethanes with increased resistance to abrasion
US4397974A (en) * 1981-04-02 1983-08-09 Bayer Aktiengesellschaft Low-halogen-content, thermoplastic polyurethane elastomer having improved flame resistance by the addition of a 4-component additive combination, its production and its use
EP0384354A2 (fr) * 1989-02-20 1990-08-29 Canon Kabushiki Kaisha Lame de nettoyage et appareil électrophotographique l'utilisant
EP0730000A1 (fr) * 1995-03-03 1996-09-04 Tosoh Corporation Composition de polymère retardatrice de flamme

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Publication number Priority date Publication date Assignee Title
US4342682A (en) * 1981-09-18 1982-08-03 Borg-Warner Chemicals, Inc. Intumescent flame retardant thermoplastic polyurethane elastomer compositions
US4572862A (en) * 1984-04-25 1986-02-25 Delphic Research Laboratories, Inc. Fire barrier coating composition containing magnesium oxychlorides and high alumina calcium aluminate cements or magnesium oxysulphate
US5045635A (en) * 1989-06-16 1991-09-03 Schlegel Corporation Conductive gasket with flame and abrasion resistant conductive coating
US6228433B1 (en) * 1997-05-02 2001-05-08 Permagrain Products, Inc. Abrasion resistant urethane coatings

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2547555A1 (de) * 1975-10-23 1977-04-28 Kz Vnii Sintetitscheskoyo Kaut Thermostabile urethanelastomere und mischungen auf deren basis
US4206102A (en) * 1976-09-15 1980-06-03 Mobay Chemical Corporation Method of producing polyurethanes with increased resistance to abrasion
US4397974A (en) * 1981-04-02 1983-08-09 Bayer Aktiengesellschaft Low-halogen-content, thermoplastic polyurethane elastomer having improved flame resistance by the addition of a 4-component additive combination, its production and its use
EP0384354A2 (fr) * 1989-02-20 1990-08-29 Canon Kabushiki Kaisha Lame de nettoyage et appareil électrophotographique l'utilisant
EP0730000A1 (fr) * 1995-03-03 1996-09-04 Tosoh Corporation Composition de polymère retardatrice de flamme

Also Published As

Publication number Publication date
WO2002068061A3 (fr) 2002-10-31
AU2002252145A1 (en) 2002-09-12
WO2002068061A2 (fr) 2002-09-06
EP1377635A2 (fr) 2004-01-07

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