EP1478693A2 - Transparent thermoplastic composition comprising hollow glass beads - Google Patents
Transparent thermoplastic composition comprising hollow glass beadsInfo
- Publication number
- EP1478693A2 EP1478693A2 EP03718891A EP03718891A EP1478693A2 EP 1478693 A2 EP1478693 A2 EP 1478693A2 EP 03718891 A EP03718891 A EP 03718891A EP 03718891 A EP03718891 A EP 03718891A EP 1478693 A2 EP1478693 A2 EP 1478693A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- particles
- light
- diffusing
- thermoplastic composition
- plate
- 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- Withdrawn
Links
Classifications
-
- 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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/16—Solid spheres
- C08K7/18—Solid spheres inorganic
- C08K7/20—Glass
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
-
- 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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
- C08L33/10—Homopolymers or copolymers of methacrylic acid esters
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
- Y10T428/24992—Density or compression of components
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
- Y10T428/254—Polymeric or resinous material
Definitions
- the subject of the present invention is a transparent plastic composition comprising particles of hollow glass beads, which can be used to form shaped articles, in particular plates (or panels) diffusing light. These plates are more particularly suitable for making flat luminous screens intended for the display system of microcomputers, in particular liquid crystal.
- Light scattering plates are known which are intended for the manufacture of microcomputer screens.
- a plate is for example made of a transparent plastic material, such as poly (methyl methacrylate) (PMMA), and is coated on one of its faces with dots of suitable size, printed by a technique such as serigraphy.
- PMMA poly (methyl methacrylate)
- such a plate of generally rectangular shape, is illuminated by a light source, generally one or more fluorescent tubes placed in the vicinity of one or more edges of the panel (especially in parallel to the latter), so as to illuminate the latter (or these) by the edge (also designated by the term “song").
- a light source generally one or more fluorescent tubes placed in the vicinity of one or more edges of the panel (especially in parallel to the latter), so as to illuminate the latter (or these) by the edge (also designated by the term “song").
- the light rays from the source are transmitted by the transparent material in the mass of the plate, which thus functions as a light guide.
- a diffusing plate In a microcomputer display system, such a diffusing plate is generally mounted behind the liquid crystal display device, and thus brightens the information displayed by the latter.
- This diffusing plate, the associated light source (s), the frame in which the assembly is mounted, and possibly accessory elements (such as films helping to make the diffused light more homogeneous, prismatic films and / or one or more protective films) constitute a unit used in the field of assembling flat screens of microcomputers, often referred to in the art by the English expression of "back light unit”. It is designated in the present text by the terms "backlight unit".
- the diffusing plate is illuminated for example by 2 fluorescent tubes placed parallel to the edges corresponding to 2 opposite sides.
- the scattered light intensity can show a certain variation from one of these sides to the other, with a drop in the central part of the plate. It is desirable for the visual comfort of the user that the drop in light intensity observed in the central part of the plate is as limited as possible.
- Diffusing plates provided with screen-printed dots have drawbacks arising from the difficulty of their manufacture, which is accompanied by a high rejection rate of non-conforming products. They are more fragile, in particular due to problems of adhesion of the points to the plate or the possibility of scratching when handling said plates.
- light scattering panels usable for light display systems, for advertising or signage purposes.
- These display systems generally comprise, mounted in an appropriate frame, an assembly comprising a plate (or panel) of transparent plastic material containing particles of material capable of diffusing light. These plates can be lit by light sources placed in the vicinity of the edge (s).
- patent application EP 0893481 describes a composition made of transparent plastic material comprising polyamide particles, usable for light display systems.
- the levels of illumination allowed by such a system of the order of a few hundred lux, are however insufficient to ensure the illumination of a microcomputer screen.
- Japanese application JP 50-002180 discloses a thermoplastic resin composition obtained by polymerization of a monomer derived from methyl methacrylate, which comprises from 0.2 to 20% by weight of glass particles. This composition is used for the preparation of a molded product by stretching a cast plate, said product offering, thanks to its surface roughness, advantageous optical properties taken advantage of in the making of a lampshade.
- the purpose of this application is to improve the optical properties of the shaped articles diffusing the light, and in particular those of the plates required by the backlighting units intended for the assembly of flat screens for microcomputer. It therefore aims to ensure a high scattered light intensity, while maintaining a homogeneous character of this intensity over the entire surface of the plate, and in particular on its central part.
- the object of the invention is, for this purpose, a thermoplastic composition for shaped articles diffusing light, based on the one hand of transparent thermoplastic material formed of a (meth) acrylic (co) polymer, and on the other hand of light scattering particles, said composition being characterized in that it comprises, as light scattering particles, particles of hollow glass beads - or a mixture of particles of hollow glass beads and particles of mineral and / or organic compound -, said light-scattering particles: having an average dimension of 0.5 ⁇ m to 200 ⁇ m, having a refractive index different from that of the transparent thermoplastic material of at least ⁇ 0.05 and, being used in quantity, by relative to the total composition, from 5 ppm to
- the light scattering particles preferably have an average dimension of 2 ⁇ m to 100 ⁇ m, and even more preferably from 10 to 50 ⁇ m.
- thermoplastic composition according to the invention preferably contains from 50 to 700 ppm and particularly from 100 to 500 ppm by weight of light-diffusing particles.
- the relative quantities of ingredients are indicated by percentages by weight.
- the refractive index of the light scattering particles preferably differs from that of the thermoplastic by at least ⁇ 0.1.
- composition according to the invention can also contain additives such as, for example, dyes, lubricants or UV stabilizers.
- the (meth) acrylic thermoplastic (co) polymer can be, in particular, constituted by a homopolymer of alkyl (meth) acrylate, or else by a copolymer derived from alkyl (meth) acrylate and from at least one monomer. ethylenically unsaturated (s) copolymerizable (s) with alkyl (meth) acrylate.
- the term "(meth) acrylic” is intended to denote a derivative of acrylic or methacrylic acid, and by "(meth) acrylate” an acrylate or methacrylate ester.
- thermoplastic (co) polymer It is preferred to use a methacrylic thermoplastic (co) polymer.
- alkyl methacrylate mention may in particular be made of compounds in which the alkyl group has from 1 to 10 carbon atoms, for example methyl, ethyl, propyl, isopropyl, butyl and isobornyl methacrylate .
- a particularly advantageous monomer is methyl methacrylate, the polymerization of which leads to poly (methyl methacrylate) which, as a thermoplastic polymer suitable for the invention, is particularly preferred, in particular because of its advantageous optical properties.
- the (meth) acrylic thermoplastic (co) polymer preferably comprises from 70 to 100% by weight of the main monomer: (for example alkyl methacrylate), and from 0 to 30% by weight of monomer (s) to ethylenic unsaturation (s) copolymerizable with alkyl methacrylate.
- ethylenically unsaturated monomer (s) are chosen, for example, from Cio-alkyl acrylates, styrene, substituted styrenes, acrylonitrile, methacrylonitrile, methacrylates C1-C10 alkyl different from the main monomer, hydroxyalkyl acrylates and methacrylates, alkoxyalkyl or aryloxyalkyl acrylates and methacrylates, in which the alkyl group has from 1 to 4 carbon atoms, acrylamide, methacrylamide , acrylic acid, methacrylic acid, maleimides and alkylene glycol dimethacrylates, in which the alkylene group has from 1 to 4 carbon atoms.
- the (meth) acrylic (co) polymers can be obtained by any known process, for example by suspension, emulsion, bulk or solution polymerization in a solvent.
- the light scattering particles consist only of hollow glass beads.
- hollow glass beads are commercially available.
- beads known under the name Scotchlite ® is marketed by Minnesota Mining and Manufacturing Company (3M), St. Paul, Minnesota, USA. These beads are obtained by known methods.
- EP 1 172 341 it is possible, for example, to add a flammable liquid to a mixture containing ingredients suitable for the preparation of glass as well as a blowing agent, then subject the entire composition to wet grinding so as to obtain a dispersion of particles having a 5
- This slurry is then atomized by means of a nozzle with 2 fluids, at a pressure between 0.2 and 2 MPa, so as to form droplets. Heating these droplets leads to the formation of hollow glass beads or microspheres.
- ingredients suitable for the preparation of glass mention may be made of silica sand, volcanic ash, perlite, obsidian, silica gel, zeolite, bentonite, borax, boric acid, Ca (PO ), Na 2 SO 4 , Ma P 2 O, Al 2 O 3 , a compound derived from SiO 2 , B 2 O 3 or Na 2 O. It is preferred to use a glass based on borosilicates, in particular sodium hydroxide and lime.
- the blowing agent generates gas when the mixture of ingredients leading to the glass is subjected to vitrification by heating, and has the effect of producing substantially spherical and hollow particles of molten and vitrified glass.
- the blowing agent can be, for example, sulfate, carbonate, nitrate, sodium acetate, potassium, lithium, calcium, magnesium, barium, aluminum or zinc.
- the light-scattering particles can also consist of a mixture comprising: particles of hollow glass beads, and particles of mineral compound, such as titanium dioxide, barium sulphate, zinc oxide, and / or - particles of organic compound, such as crosslinked polystyrene, poly (tetrafluoroethylene) or particles with a multilayer structure, for example bilayer, formed from at least one crosslinked polystyrene core.
- the composition according to the invention can be obtained by hot mixing of the thermoplastic material (for example in the form of granules), with particles of diffusing material (hollow glass beads and, optionally, particles of mineral and / or organic compound ) and possibly other additives such as dyes, lubricants or UV stabilizers. These particles and additives are, in general, mixed with the thermoplastic material in the form of a masterbatch. This mixing can be carried out in any suitable device.
- the present invention also relates to a shaped article diffusing light which can be produced from the thermoplastic composition described above by various known molding methods, in particular by extrusion, injection, compression or casting. We then obtain plate products and molded products of various shapes.
- composition according to the invention is particularly suitable for manufacturing articles, in particular plates, by extrusion. Indeed, for the shaped article to have diffusing properties, the composition from which it is made, must contain particles whose substantially spherical shape is not changed at the temperature used for extrusion.
- the composition according to the invention which contains particles of the hollow glass beads is particularly suitable since these particles have a high melting temperature (approximately 1200 ° C.). This is also the case for compositions which comprise a mixture of particles as described above, particularly that based on hollow glass beads and poly (tetrafluoroethylene).
- the shaped articles can also be obtained directly in the form of plates by mass polymerization of a mixture of (meth) acrylic monomers and optionally of their prepolymer, in the presence of light-diffusing particles (hollow glass beads and optionally particles of compound mineral and / or organic) and other possible additives, in a mold formed by two glass plates (casting process).
- light-diffusing particles hindered glass beads and optionally particles of compound mineral and / or organic
- any known free radical initiator can be used, for example diazo compounds such as azo-bis-isobutyronitrile (AIBN), peroxides, such as benzoyl peroxide.
- the copolymerization generally takes place in the presence of a chain transfer agent, such as monocyclic diunsaturated terpenes and monounsaturated bicyclic terpenes such as terpinolene, mercaptans, such as tert-dodecyl-mercaptan. It is also possible to add agents promoting the release of the plates, for example stearic acid, sodium dioctylsulfosuccinate, in the amount usually used.
- the plates obtained from the compositions according to the invention, can have different thicknesses depending on the use envisaged, and in particular from 3 mm to 25 mm.
- the thickness is generally 8 to 20 mm.
- Extrusion is a suitable process for manufacturing articles (plates for example) of the thickness indicated above and, in particular, of thin thickness.
- the extrusion process provides a low thickness tolerance compared to other manufacturing processes, which ensures the reproducibility of plates and therefore of the light intensity emitted, and facilitates the mounting of plates in frames with precise dimensions. .
- This type of specification is particularly required for the production of flat luminous screens.
- the subject of the invention is also a light diffusing panel, which comprises a support made of transparent thermoplastic material formed from a (meth) acrylic (co) polymer, and a diffusing layer formed from a composition according to the invention, placed on one side or both sides of the support.
- This product can be obtained by any suitable process, for example by coextrusion, juxtaposition of 2 hot plates by simple adhesion (still T FR03 / 00524
- the support can have a thickness of 2 to 25 mm and the diffusing layer (s) a thickness of 20 to 1000 ⁇ m.
- the plates obtained from the compositions according to the invention can be used in any light display system, and in particular that described in patent application EP-A-0893481.
- the shaped articles described above are light diffusing plates having a thickness of between 3 to 15 mm, preferably between 4 and 12 mm, and even more preferably between 6 and 10 mm. These plates are suitable for making backlight units for assembling flat screens of microcomputers. These plates are advantageously produced by shaping the thermoplastic composition according to the invention by extrusion.
- the invention finally relates to a backlight unit suitable for assembling flat screens of microcomputers, comprising:
- one or more light sources placed in the vicinity of one or more edges of said plate, so as to illuminate the latter by one or more edges,
- fluorescent tubes are used as a light source, 2 in number or an even number greater than 2, arranged (optionally in pairs) parallel to the edges of the plate which correspond to 2 sides opposed.
- FIG. 1 illustrates an embodiment of the backlight unit according to the invention, seen from above.
- a light diffusing plate (1) according to the invention is illuminated by 2 fluorescent tubes (2) mounted in a white plastic frame (3), so as to illuminate the plate by 2 of its sides (or edges) (4) opposed.
- these edges (4) facing the fluorescent tubes are polished beforehand to avoid the reflection of the light emitted.
- the face (A) of the plate (1) is that through which the light is diffused, for example towards a liquid crystal display device.
- the face (B) of the plate advantageously carries a film or an opaque plate (5) formed by any suitable material, for example example by polymethyl methacrylate treated to have a low transmission (such as Altuglas ref. 101.47005), a polymer of white vinyl chloride, a white polyester or polyethylene.
- a film or an opaque plate (5) formed by any suitable material, for example example by polymethyl methacrylate treated to have a low transmission (such as Altuglas ref. 101.47005), a polymer of white vinyl chloride, a white polyester or polyethylene.
- FIG. 2 represents the distribution of the light intensity (in lux) diffused by plates prepared in accordance with examples 1 to 5 described below, and tested in accordance with the test protocol also described below, as a function of the distance from from the right fluorescent tube (in cm).
- the plates manufactured in the composition illustrated in the examples are first cut to a rectangular format of 31.4 cm by 23.9 cm. They are then tested in the device described in Figure 1, representative of a backlight unit.
- the light sources are 23.9 cm long LTM 150XH cold cathode fluorescent tubes sold by the company Harrison. Each of the 2 fluorescent tubes was placed in a white profile with a 6 mm lip into which the small side of the plate is also inserted. In this way, the light emitted by each tube is directed exclusively on the edge of the plate.
- the evaluation of the scattered light intensity is carried out perpendicular to the plate, using a luxmeter whose cell is placed at variable distances counted on an axis parallel to the length of the plate, and equal 4, 8, 12, 16 and 20 cm from the right fluorescent tube (for an observer looking at the scattered light).
- Example 1 Thermoplastic composition comprising PMMA and 170 ppm of hollow glass beads.
- PMMA beads are used, sold by the company ATOGLAS under the name "OROGLAS ® 9EL” (grade for the extrusion of plates).
- the hollow glass beads used have an average diameter of 20 ⁇ m and a refractive index of approximately 1 (product sold by the company 3M under the name "SKOTCHLITE ® K20").
- the refractive index of PMMA is 1.498.
- This mixture is then extruded to form a rectangular plate of dimension 2000 mm x 3000 mm x 6 mm which is then cut to the desired format.
- the plate of length 31.4 cm and width 23.9 cm is then tested according to the test protocol described above.
- This curve corresponds to a high light intensity level (greater than 2000 lux), and substantially uniform from one edge to the other of the plate. In the central area of the plate, the drop in intensity is relatively limited.
- Example 2 Thermoplastic composition comprising PMMA and 810 ppm of PTFE
- the same PMMA is used as in Example 1.
- the particles of PTFE have an average diameter of 11 ⁇ m (product sold by the company DUPONT DE NEMOURS under. The name “ZONYL ® 1000").
- the refractive index of PTFE is equal to 1.376.
- the PTFE particles are incorporated into the PMMA by proceeding as in Example 1, in an amount of 5.4% of a masterbatch consisting of 1.5% of PTFE. We also obtain in the same way extruded plates of the same dimension.
- test protocol leads to the light intensity values indicated in table 1, corresponding to the curve of FIG. 2 identified by "example 2".
- This curve corresponds to a high light intensity in the vicinity of the edges of the diffusing plate, of the same level as in Example 1.
- the light intensity is highly heterogeneous, showing a drop in the central area of the plate. about 15% compared to this same example.
- Example 3 Thermoplastic composition comprising PMMA and 200 ppm of hollow glass beads.
- Example 1 is repeated by introducing 1% of a masterbatch consisting of 2% of hollow glass beads.
- This curve has a slightly improved light intensity level compared to Example 1, while providing satisfactory homogeneity over the whole of the plate.
- Example 4 Thermoplastic composition comprising PMMA and 200 ppm of PTFE.
- Example 2 is repeated by introducing 1% of the masterbatch consisting of 2% of PTFE particles.
- This curve has a remarkably uniform light intensity over the whole of the plate, but which, in a range of around 1200 lux, is situated at a level which is very insufficient to be suitable for use in a backlight unit.
- Example 5 Thermoplastic composition comprising PMMA and a mixture of 100 ppm of hollow glass beads and 400 ppm of PS.
- a composition according to the invention is produced by proceeding as in Example 1, except that one introduces into the PMMA placed in the single-screw extender 2% of a master mixture based on PMMA comprising 5000 ppm of glass beads hollow and 2% of PS. After extrusion under the same conditions as in the previous examples, and implementation of the test protocol, the values of the scattered light intensity are indicated in table 1, and the corresponding curve is plotted in FIG. 2.
- This curve has a light intensity slightly higher than that of Example 1, which thus corresponds to an efficiency in light transmission quite excellent, except in the central part of the plate, where it remains however very close.
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0202557A FR2836477B1 (en) | 2002-02-28 | 2002-02-28 | TRANSPARENT THERMOPLASTIC COMPOSITION COMPRISING HOLLOW GLASS BALLS |
FR0202557 | 2002-02-28 | ||
PCT/FR2003/000524 WO2003072645A2 (en) | 2002-02-28 | 2003-02-18 | Transparent thermoplastic composition comprising hollow glass beads |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1478693A2 true EP1478693A2 (en) | 2004-11-24 |
Family
ID=27676177
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03718891A Withdrawn EP1478693A2 (en) | 2002-02-28 | 2003-02-18 | Transparent thermoplastic composition comprising hollow glass beads |
Country Status (10)
Country | Link |
---|---|
US (1) | US7183001B1 (en) |
EP (1) | EP1478693A2 (en) |
JP (1) | JP2005527842A (en) |
KR (1) | KR100612633B1 (en) |
CN (1) | CN1329439C (en) |
AU (1) | AU2003222927A1 (en) |
FR (1) | FR2836477B1 (en) |
MY (1) | MY135165A (en) |
TW (1) | TWI284662B (en) |
WO (1) | WO2003072645A2 (en) |
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FR2766493B1 (en) * | 1997-07-25 | 2003-10-03 | Atohaas Holding Cv | THERMOPLASTIC COMPOSITION BASED ON TRANSPARENT THERMOPLASTIC (CO) POLYMER CONTAINING POLYAMIDE PARTICLES USEABLE FOR SHAPED ARTICLES DIFFUSING LIGHT |
JP3933277B2 (en) * | 1997-11-17 | 2007-06-20 | 電気化学工業株式会社 | Thermoplastic resin composition |
FR2806088B1 (en) | 2000-03-07 | 2003-07-18 | Atofina | TRANSPARENT THERMOPLASTIC COMPOSITION CONTAINING POLYTETRAFLUOROETHYLENE PARTICLES AND SHAPED ARTICLES MADE THEREFROM |
-
2002
- 2002-02-28 FR FR0202557A patent/FR2836477B1/en not_active Expired - Fee Related
-
2003
- 2003-02-18 CN CNB038048736A patent/CN1329439C/en not_active Expired - Fee Related
- 2003-02-18 JP JP2003571344A patent/JP2005527842A/en active Pending
- 2003-02-18 WO PCT/FR2003/000524 patent/WO2003072645A2/en active IP Right Grant
- 2003-02-18 AU AU2003222927A patent/AU2003222927A1/en not_active Abandoned
- 2003-02-18 EP EP03718891A patent/EP1478693A2/en not_active Withdrawn
- 2003-02-18 US US10/505,598 patent/US7183001B1/en not_active Expired - Fee Related
- 2003-02-18 KR KR1020047013480A patent/KR100612633B1/en not_active IP Right Cessation
- 2003-02-27 MY MYPI20030708A patent/MY135165A/en unknown
- 2003-02-27 TW TW092104243A patent/TWI284662B/en not_active IP Right Cessation
Non-Patent Citations (1)
Title |
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See references of WO03072645A2 * |
Also Published As
Publication number | Publication date |
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CN1639248A (en) | 2005-07-13 |
KR100612633B1 (en) | 2006-08-14 |
FR2836477A1 (en) | 2003-08-29 |
CN1329439C (en) | 2007-08-01 |
FR2836477B1 (en) | 2004-06-18 |
WO2003072645A3 (en) | 2004-04-01 |
WO2003072645A2 (en) | 2003-09-04 |
JP2005527842A (en) | 2005-09-15 |
US7183001B1 (en) | 2007-02-27 |
AU2003222927A1 (en) | 2003-09-09 |
MY135165A (en) | 2008-02-29 |
AU2003222927A8 (en) | 2003-09-09 |
KR20040088560A (en) | 2004-10-16 |
TWI284662B (en) | 2007-08-01 |
TW200307010A (en) | 2003-12-01 |
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