Classifications

• • 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
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
  • C08J5/18—Manufacture of films or sheets
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
  • C08L25/02—Homopolymers or copolymers of hydrocarbons
  • C08L25/04—Homopolymers or copolymers of styrene
  • C08L25/08—Copolymers of styrene
  • C08L25/10—Copolymers of styrene with conjugated dienes
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
  • C08L25/02—Homopolymers or copolymers of hydrocarbons
  • C08L25/04—Homopolymers or copolymers of styrene
  • C08L25/08—Copolymers of styrene
  • C08L25/14—Copolymers of styrene with unsaturated esters
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L35/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical, and containing at least one other carboxyl radical in the molecule, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
  • C08L35/06—Copolymers with vinyl aromatic monomers
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
  • C08L53/02—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes
• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
  • G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
• • 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
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31855—Of addition polymer from unsaturated monomers
  • Y10T428/31909—Next to second addition polymer from unsaturated monomers

Definitions

• the present invention relates to a resin composition and an optical screen sheet using the same as a base material.
• An optical screen such as a transmission type screen of a projection television is usually composed of a lens sheet such as a Fresno lens sheet / a lenticular lens sheet.
• a front panel may be mounted on the surface of the lens sheet for the purpose of protecting the lens sheet.
• Japanese Patent Application Laid-Open No. 1-128059 proposes a lens sheet obtained by adding a methyl methacrylate-based multilayer rubber to an acrylic resin.
• Japanese Patent Application Laid-Open No. 9-320176 and Japanese Patent Application Laid-Open No. Hei 9-320177 propose a lens sheet comprising a methyl methacrylate-styrene copolymer resin.
• Japanese Patent Application Laid-Open Publication No. 2000-66607 proposes a lens sheet obtained by adding a butadiene-based graft rubber to a methyl methacrylate-styrene copolymer resin.
• the lens sheet proposed in the above-mentioned Japanese Patent Application Laid-Open No. 1-128059 / Japanese Patent Application Laid-Open No. 2000-66307 has a problem such as warping or bending during use, storage and transportation. There is a problem of easy deformation.
• the lens sheet proposed in Japanese Patent Application Laid-Open No. Hei 9-301-176 and Japanese Patent Application Laid-Open No. Hei 9-301 177 has a problem that cracks easily occur during processing or installation. There is.
• An object of the present invention is to provide a resin material which is excellent in transparency, hardly causes deformation such as warpage or bending, and can be suitably used as a base material of a screen sheet which hardly causes cracking or chipping. That is, the present invention provides a rubber-like copolymer (A) having a styrene-based monomer unit and a gen-based monomer unit, and a styrene-based monomer unit and a (meth) acrylate-based monomer unit.
• a resin composition comprising a copolymer (B) having the following formula (1) and satisfying the following conditions (1) to (5):
• the sheet has a thickness of 2 mm, the total light transmittance is 85% or more, the haze value is 5% or less,
• Vicat softening temperature is 90 ° C or more.
• the present invention also provides an optical screen sheet comprising the above resin composition according to the present invention as a base material.
• the present invention provides a method for producing a sheet for an optical screen by cutting a sheet having the above-mentioned resin composition according to the present invention as a base material by cutting both sides thereof with a cutting blade.
• the (meth) acrylic acid ester means an ester of acrylic acid and / or an ester of methacrylic acid.
• the resin composition of the present invention comprises a rubbery copolymer (A) having a styrene monomer unit and a digen monomer unit, and a styrene monomer unit and a (meth) acrylate ester unit. It is composed of a copolymer (B) having a monomer unit, and usually particles of the rubbery copolymer (A) are dispersed in a continuous phase of the copolymer (B).
• the styrene monomer which is a constituent unit of the rubbery copolymer (A) means styrene or a styrene derivative, and examples thereof include styrene, alkyl-substituted styrenes (for example, o-methylstyrene, p-methylstyrene, —Methynolestyrene, m-methylstyrene, 2,4-dimethynolestyrene, —Ethylstyrene, p-t-butylstyrene, a-methylstyrene, ct-methyl-1-p-methylstyrene, etc., nodogen-substituted styrenes (eg , O-chlorostyrene, p-chlorostyrene, etc.) You. Among them, styrene is preferred. These styrenic monomers may
• Examples of the gen-based monomer that is a constituent unit of the rubber-like copolymer (A) include butadiene, 2-methylbutadiene, 2,3-dimethylbutadiene and the like. Of these, butadiene is preferred. These gen monomers may be used in combination of two or more as necessary.
• the rubbery copolymer (A) may have a monomer unit other than a styrene monomer unit and a gen monomer unit as necessary.
• optional monomers include (meth) acrylates (eg, methyl acrylate, ethyl acrylate, butyl acrylate, hexyl acrylate, phenyl acrylate, phenyl acrylate, benzyl acrylate, 2-Ethylhexyl acrylate, 2-hydroxyhexyl acrylate, methyl methacrylate, methyl methacrylate, butyl methacrylate, cyclyl methacrylate Unsaturated nitriles (eg, acrylonitrile, methacrylonitrile, etc.); unsaturated amides (eg, acrylamide, diacetone acrylamide, etc.); Unsaturated acids (eg, acrylic acid, meta Such acrylic acid); unsaturated imide compound (e.g., Fueerum
• Examples of the styrene-based monomer that is a constituent unit of the copolymer (B) include the same styrene-based monomer that constitutes the rubber-like copolymer (A). Styrene is preferred.
• Examples of the (meth) acrylate-based monomer that is a constituent unit of the copolymer (B) include the same ones as the above (meth) acrylates. Among them, methyl methacrylate is particularly preferred. Is preferred.
• the copolymer (B) may have a monomer unit other than a styrene monomer unit and a (meth) acrylate ester monomer unit as necessary.
• examples of such an arbitrary monomer include the above-mentioned unsaturated ditrinoles, unsaturated amides, unsaturated acids, unsaturated imides, and unsaturated acid anhydrides.
• the resin composition of the present invention needs to have a saturated water absorption of 0.8% or less at a temperature of 60 ° C and a relative humidity of 90%. If the saturated water absorption exceeds 0.8%, the resulting screen tends to be greatly warped due to dimensional change due to water absorption, which tends to cause image deterioration due to defocus and the like.
• the saturated water absorption is preferably set to 0.7% or less.
• the resin composition of the present invention needs to have a flexural modulus of 180 OMPa or more.
• the flexural modulus is less than 180 OMPa, the resulting screen may be easily bent and the self-sustainability may be insufficient.
• the flexural modulus is preferably at least 190 OMPa.
• the resin composition of the present invention needs to have a notched Izod impact strength of 2 kJ / m 2 or more. If the notched Izod impact strength is less than 2 kJ / m 2, it may be cracked or chipped when processed into a screen or when the obtained screen is installed.
• the notched Izod impact strength is preferably at least 2.5 kj / m 2 .
• the total light transmittance in the thickness direction is 85% or more, and the power haze value is 5% or less. is necessary. If the total light transmittance is less than 85%, the brightness of the resulting screen may not be sufficient. On the other hand, if the haze value exceeds 5%, the clear feeling of the screen of the obtained screen may be impaired.
• the resin composition of the present invention needs to have a Vicat softening temperature of 90 ° C. or more.
• the Vicat softening temperature is preferably 95 ° C. or higher.
• Rubber-like copolymer (A) and copolymer (B) The resin composition of the present invention having desired and various physical properties can be obtained by using rubber-like copolymer (A) and styrene-based monomer as raw materials. Using (meth) acrylic acid ester monomers and other monomers as necessary, adjusting the types and ratios of the above-mentioned raw materials, polymerization conditions, and the like, and mixing these monomers And then polymerized.
• Rubbery copolymer of the raw material (A) is preferably styrene-based monomer unit 5-5 0 weight 0/0 and diene-based monomer unit 5 0 - has a 9 5% by weight, more preferably scan styrene-based monomer unit 1 0 - 4 5 wt% and diene system has a monomer unit 5 5-9 0 by weight 0/0, particularly preferably styrene-based monomer unit 1 5-4 0 weight 0/0 and having a 6 0-8 5 wt% oxygenate emissions based monomer unit.
• the higher the proportion of the diene monomer unit in the rubbery copolymer (A) the higher the notched Izod impact strength of the resin composition.
• the rubbery copolymer (A) as the raw material may be a random copolymer or a block copolymer, but the total light transmittance and transmission of the luster composition are as follows. From the viewpoint of balance with the color of light, a random copolymer is preferred.
• the rubbery copolymer as the raw material may be, for example, one obtained by solution polymerization or one obtained by emulsion polymerization. From the viewpoint of lowering the temperature, those obtained by solution polymerization are preferred.
• the quantitative ratio of each monomer of the above-mentioned raw materials is calculated by summing the total of all the monomers, that is, the total of the styrene monomer, the (meth) acrylic acid ester monomer and other monomers used as necessary.
• the other monomer in the styrene monomer is 2 5-6 5 wt% (meth)
• Atarinore ester monomer is 3 for 5-7 5 weight 0/0 0-4 0 by weight 0/0
• other monomer more preferably by styrene monomer is 3 0-6 0% by weight (meth)
• acrylic acid ester monomer is 4 0-7
• wt% body is 0-3 0% by weight
• particularly preferably from other styrene-based monomer is 3 5 to 5 5 wt 0/0 (meth) acrylic acid ester monomer is 4 5-6 5 wt% Is 0 to 20% by weight.
• the higher the ratio of the (meth) acrylate-based monomer The higher the temperature, the higher the vicat softening temperature of the resin composition can be. Further, from the viewpoint of increasing the total light transmittance of the resin composition and decreasing the haze value, the difference in the refractive index between the produced copolymer (B) and the rubbery copolymer (A) becomes smaller. Thus, it is preferable to adjust the quantitative ratio of each monomer of the raw material.
• the ratio of the amount of the rubbery copolymer (A) of the raw material to the total amount of the monomers of the raw material is preferably based on the sum of the two, preferably 1 to 20% by weight.
• the latter is 80 to 99% by weight, more preferably the former is 2 to 18% by weight and the latter is 82 to 98% by weight, and particularly preferably the former is 3 to 15% by weight. Is 85 to 97% by weight.
• the higher the former ratio the lower the saturated water absorption of the resin composition and the higher the Izod impact strength with the notch.
• the higher the latter ratio the higher the bending of the resin composition.
• the elastic modulus can be increased and the Vicat softening temperature can be increased.
• 873 3 17 corresponds to the bulk polymerization method described above, and then the resulting partial polymer is cast or suspension polymerized.
• a method of polymerization or a method of polymerizing by a continuous bulk polymerization method and then removing and recovering unreacted monomers is preferable.
• an azo compound or an organic peroxide is used as a radical polymerization initiator, and a chain transfer agent is used for the purpose of controlling a polymerization rate, adjusting a molecular weight, adjusting a rubber dispersion state, and the like.
• a chain transfer agent is used for the purpose of controlling a polymerization rate, adjusting a molecular weight, adjusting a rubber dispersion state, and the like.
• the above-mentioned raw materials may be mixed at once or may be divided, and when the raw materials are divided, for example, the rubber-like copolymer (A) as the raw material and one monomer may be mixed. After the partial polymerization is carried out by mixing the resulting partial polymer and the remaining monomer, the obtained partial polymer and the remaining monomer may be mixed and polymerized.
• the resin composition of the present invention has excellent physical properties and can be suitably used as a material for various resin molded articles.
• the resin composition may contain, if necessary, a heat stabilizer, an antioxidant, a light stabilizer, an ultraviolet absorber, and a coloring agent.
• a heat stabilizer such as a heat stabilizer, an antioxidant, a light stabilizer, an ultraviolet absorber, and a coloring agent.
• One or more conventional additives such as a plasticizer, a release agent, a lubricant, and a light diffusing agent may be added. These may be added at the time of polymerization for preparing the resin composition, or may be added after polymerization, for example, at the time of pelletizing the resin composition.
• the resin composition of the present invention is suitably used as a material of an optical member, particularly as a base material of a sheet for an optical screen such as a transmission screen of a projection television.
• an optical screen sheet include a lens sheet such as a Fresnel lens sheet and a lenticular lens sheet, and a front panel.
• the Fresnel lens sheet may be produced by, for example, cast molding, or may be produced by giving a Fresnel lens shape by press molding to a so-called original sheet obtained by cast molding, extrusion molding, or the like. It may be manufactured by curing an ultraviolet ray curable resin on the surface of a sheet serving as an original plate so as to form a Fresnel lens shape.
• the lenticular lens sheet may be manufactured by, for example, extrusion molding, cast molding, or may be manufactured by applying a lenticular lens shape to a sheet serving as an original plate by press molding. Alternatively, it may be manufactured by laminating a film having a lenticular lens shape formed on its surface with an ultraviolet curable luster to the original sheet.
• the front panel may be manufactured by, for example, extrusion molding, cast molding, or may be manufactured by applying a surface treatment such as a hard coat or a low reflection coat.
• the sheet In the production of optical screen sheets such as Fresno lens sheet, lenticular lens sheet and front panel lens, it is usually necessary to finally cut the sheet to a desired size. From the viewpoint, it is preferable to employ a method of cutting and inserting a shear blade on both sides of the sheet from a direction which is usually almost perpendicular (so-called press cutting method). At this time, if the impact resistance of the sheet is not sufficient, the sheet is likely to crack or chip, but the sheet based on the resin composition of the present invention having a high notched Izod impact strength of 2 kj / m 2 or more is used. If so, such cracks and chips are unlikely to occur. From this point of view, the notched eye chilling impact strength is preferably 3 k J / m 2 or more, more preferably 4 k J / m 2 or more on, particularly preferably 5 k J / m 2 or more.
• a method of hardening an ultraviolet curable resin on the surface of the sheet serving as an original plate so that the Fresnel lens shape is formed is preferred.
• Fresnel lens type The thickness of the cured resin layer is usually in the range of 100 to 300 ⁇ .
• a cured resin layer protruding like a paris is usually formed to a thickness of about several mm around the Fresnel lens-shaped cured resin layer formed on the surface of the sheet serving as the original plate.
• the shearing blade is inserted into the surface having the resin layer and the surface opposite thereto.
• the cutting is substantially performed because the former surface is harder than the latter surface. Then, the notch on the latter surface is propagated. Therefore, the press cutting is performed under a condition in which cracks and chips are likely to occur.
• the sheet serving as an original sheet is made of the resin composition of the present invention as a base material, the cracks and chips are caused. Hard to stiffen.
• an optical screen composed of a plurality of sheets for example, an optical screen composed of a Fresnel lens sheet, a lenticular lens sheet and a front panel, at least one of them, preferably all sheets
• a sheet having the resin composition of the present invention as a base material can be employed.
• test piece was cut out from a resin sheet having a thickness of 2 mm, dried at 80 ° C. under a vacuum of 1 B, and the weight of the test piece was measured. This weight is referred to as “dry specimen weight”.
• dry specimen weight The dried test piece was placed in a thermo-hygrostat adjusted to a temperature of 60 ° C. and a relative humidity of 90%, and was allowed to stand until the weight became constant. This constant weight is referred to as “water saturation test piece weight”.
• the saturated water absorption was determined from the weight of the obtained dried test piece and the weight of the water saturated test piece according to the following formula.
• test piece was cut out from a resin sheet having a thickness of 2 mm, and the flexural modulus was measured according to JIS K 7203 (1995).
• Notched Izod impact strength (kj / m 2 ) A test piece was cut out from a 2 mm thick resin sheet, and the Izod impact strength with a notch was measured in accordance with JISK 7110 (1999).
• test piece was cut out from a resin sheet having a thickness of 2 mm, and the total light transmittance and the haze value were measured according to JIS K 7105 (1981).
• a test piece was cut out from a resin sheet having a thickness of 2 mm, and the Vicat softening temperature was measured according to JIS K 7206 (1991).
• the obtained resin sheet was evaluated by the following method.
• a sample of 20 cm ⁇ 30 cm was cut out from a resin sheet having a thickness of 2 mm, and an aluminum foil was adhered to one side using an adhesive.
• the sample with aluminum foil was placed in a thermo-hygrostat adjusted to a temperature of 60 ° C and a relative humidity of 90%, and the magnitude of the warp 24 hours later was visually determined.
• a sample of 20 cm ⁇ 30 cm was cut out from a 1 mm thick resin sheet, set upright with the 20 cm side at the bottom, and the bottom was fixed, and the magnitude of the deflection was visually determined.
• a 20 cm x 30 cm sample was cut out from a 2 mm thick resin sheet, cut in the direction of 20 cm with an acrylic cutter, cut by hand along the cut, and the presence or absence of cracks or chips in the cross section was visually determined. .
• a sample of 20 cm x 30 cm was cut out from a 2 mm thick resin sheet, placed on the front of the projection TV screen, and the clearness of the image was judged visually.
• a sample of 20 cm ⁇ 30 cm was cut out from a resin sheet having a thickness of 2 mm, kept at 80 ° C. for one week, and the presence or absence of deformation was visually determined.
• the following rubbery copolymer was used as a raw material.
• the rubbery copolymers, monomers and polymerization initiators of the types and amounts shown in Table 1 were mixed, and the mixture was subjected to a predetermined residence time at 150 ° C. using a two-stage stirring type continuous reactor (Examples 1 to 5).
• the polymer was partially polymerized in 360 seconds for Comparative Example 3 and Comparative Examples 1 and 4, and for 225 seconds in Comparative Examples 2 and 3.
• the weight ratio of the rubbery copolymer and the monomer (styrene and methyl methacrylate) and the weight ratio of styrene and methyl methacrylate used as raw materials are as shown in Table 2 in total.
• Table 3 shows the physical property values of the obtained tree sheet having a thickness of 2 mm
• Table 4 shows the evaluation results of the resin sheet having a thickness of lmm or 2 mm.
• a copolymer of styrene Z methyl methacrylate 40/60 (weight ratio), MS 600, manufactured by Mannichi Iron & Chemicals Co., Ltd., was molded using an extruder to obtain a lmm mm resin sheet was obtained.
• Table 3 shows the physical property values of the obtained resin sheet having a thickness of 2 mm
• Table 4 shows the evaluation results of the resin sheet having a thickness of 1 mm or 2 mm.
• the saturated water absorption was 0: 6%
• the flexural modulus was 2770 MPa
• the Izod impact strength with a notch was 7.
• Ok J Zm 2 and the total light transmittance was 91%
• the haze value was 0.3%
• the Vicat softening temperature was 104 ° C.
• An ultraviolet-curable resin is interposed between the obtained 1.8-mm-thick resin sheet and a mold having a Fresnel lens shape, and the resin is cured by irradiation with ultraviolet light.
• a Fresnel lens layer having a thickness of 100 to 300 ⁇ was formed. No cracking or chipping was observed on both sides of the sheet as a result of cutting with a shearing blade from almost perpendicular directions.
• Styrene methyl methacrylate 40/60 (weight ratio) copolymer MS 600, manufactured by Gaku Co., Ltd.] was molded using an extruder to obtain a resin sheet having a thickness of 1.8 mm.
• An ultraviolet curable resin is interposed between the obtained resin sheet and a mold having a Fresnel lens shape, and is cured by irradiation with ultraviolet light, so that the resin sheet has a thickness of 100 to A Fresnel lens layer of 300 / zm was formed.
• the resin composition of the present invention is excellent in transparency, hardly causes deformation such as warpage or deflection, and can be suitably used as a base material of a screen sheet that hardly causes cracking or chipping.

Landscapes

• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Organic Chemistry (AREA)
• Health & Medical Sciences (AREA)
• Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Materials Engineering (AREA)
• General Physics & Mathematics (AREA)
• Optics & Photonics (AREA)
• Manufacture Of Macromolecular Shaped Articles (AREA)
• Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
• Overhead Projectors And Projection Screens (AREA)
• Compositions Of Macromolecular Compounds (AREA)
• Optical Elements Other Than Lenses (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=18880301

Family Applications (1)

Country Status (7)

Families Citing this family (16)

Citations (6)

Family Cites Families (3)

• 2001
  • 2001-12-04 JP JP2001369659A patent/JP2002284946A/ja active Pending
• 2002
  • 2002-01-18 TW TW091100739A patent/TW555805B/zh active
  • 2002-01-21 EP EP02715835A patent/EP1375587A4/en not_active Withdrawn
  • 2002-01-21 CN CNB028039270A patent/CN1223630C/zh not_active Expired - Fee Related
  • 2002-01-21 US US10/466,889 patent/US6927257B2/en not_active Expired - Fee Related
  • 2002-01-21 WO PCT/JP2002/000367 patent/WO2002057356A1/ja not_active Ceased
  • 2002-01-21 KR KR1020037009620A patent/KR100828974B1/ko not_active Expired - Fee Related

Patent Citations (6)

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events