WO2003037983A2 - Materiau polymere thermoplastique et disques moules - Google Patents
Materiau polymere thermoplastique et disques moules Download PDFInfo
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- WO2003037983A2 WO2003037983A2 PCT/FR2002/003751 FR0203751W WO03037983A2 WO 2003037983 A2 WO2003037983 A2 WO 2003037983A2 FR 0203751 W FR0203751 W FR 0203751W WO 03037983 A2 WO03037983 A2 WO 03037983A2
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- methyl methacrylate
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- 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
- C08L33/12—Homopolymers or copolymers of methyl methacrylate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
-
- 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
-
- 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
- C08L33/08—Homopolymers or copolymers of acrylic acid esters
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/123—Integrated head arrangements, e.g. with source and detectors mounted on the same substrate
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
- G11B7/127—Lasers; Multiple laser arrays
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/18—Spheres
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2666/00—Composition of polymers characterized by a further compound in the blend, being organic macromolecular compounds, natural resins, waxes or and bituminous materials, non-macromolecular organic substances, inorganic substances or characterized by their function in the composition
- C08L2666/02—Organic macromolecular compounds, natural resins, waxes or and bituminous materials
- C08L2666/24—Graft or block copolymers according to groups C08L51/00, C08L53/00 or C08L55/02; Derivatives thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L51/003—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds
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- 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
- Y10T428/21—Circular sheet or circular blank
Definitions
- the invention relates to molded discs for recording audio and / or optical information, in particular audio discs (CD) and DVD (digital video dise), and to a thermoplastic polymer material useful for their manufacture.
- CD audio discs
- DVD digital video dise
- thermoplastic polymer material within the meaning of the invention is particularly meant a material based on a thermoplastic methacrylic (co) polymer resin, that is to say a homopolymer of methyl methacrylate or of a copolymer mainly containing units derived from the methyl methacrylate monomer or else resulting from the chemical modification of the methacrylic (co) polymer, for example by imidation.
- a thermoplastic methacrylic (co) polymer resin that is to say a homopolymer of methyl methacrylate or of a copolymer mainly containing units derived from the methyl methacrylate monomer or else resulting from the chemical modification of the methacrylic (co) polymer, for example by imidation.
- the homopolymer of methyl methacrylate and the methacrylic copolymers containing mainly methyl methacrylate units are thermoplastic polymers which are increasingly used because of their exceptional optical properties (gloss, very high transparency with at least 90% light transmission in the visible), their resistance to aging, corrosion and atmospheric agents.
- these polymers and copolymers are of some interest for molded discs useful for manufacturing audio and / or optical information recording media as a result of their low birefringence (low index of double refraction) and on the other hand, their high fluidity which makes it possible, in particular, to obtain discs by conventional injection molding or injection-compression techniques and precise duplication of "pits" ( cavities with reduced geometry) of the matrices.
- These methacrylic thermoplastic (co) polymers because they are fragile, are liable to break during the various stages of their transformation as well as during their transport and use.
- the molded discs for recording audio and / or optical information media obtained from these polymers may have cracks which form from the center of the discs during their manufacture and handling. during this manufacture and during their use, in particular when they are stored in boxes.
- thermoplastic polymer which make it possible to manufacture molded discs for recording media for audio and / or optical information which are resistant to cracking while retaining the properties necessary for this type. of products, in particular the ability to correctly duplicate "pits", without forgetting transparency and birefringence.
- the present invention therefore relates primarily to molded discs for recording media for audio and / or optical information, obtained from a thermoplastic polymer material comprising by weight:
- thermoplastic resin chosen from:
- a glutarimide polymer optionally in admixture with a copolymer of substituted or unsubstituted styrene and (meth) acrylonitrile and (b) 5 to 40%, preferably 15 to 30%, of at least one impact modifying compound having in the form of particles with an average size between 10 and
- thermoplastic resin (a) can be formed from a methyl methacrylate homopolymer (1) and / or from a copolymer (2) mainly containing units derived from the methyl methacrylate monomer.
- These (co) polymers (1) and (2) comprise from 51 to
- the methyl methacrylate monomer can polymerize with one or more comonomers.
- the monoethylenically unsaturated comonomer (s) copolymerizable with the methyl methacrylate monomer is (are) chosen in particular from acrylic, methacrylic, maleimide, maleic anhydride and styrene monomers.
- alkyl acrylates in which the alkyl group has from 1 to 10 carbon atoms (such as methyl acrylate, ethyl acrylate, n-butyl acrylate, 2 -ethylhexyl, isobutyl), hydroxyalkyl or alkoxyalkyl acrylates, in which the alkyl group has from 1 to 4 carbon atoms, acrylamide, acrylonitrile.
- alkyl methacrylates in which the alkyl group has from 2 to 10 carbon atoms (such as ethyl, isobutyl, secondary butyl, tertiary butyl methacrylate), methacrylate. isobornyl, methacrylonitrile, hydroxyalkyl or alkoxyalkyl methacrylates in which the alkyl group has from 1 to 4 carbon atoms.
- maleimide monomers mention may be made of N-cyclohexylmaleimide or N-isopropylmaleimide.
- the thermoplastic resin (a) can also be formed from a mixture (3) comprising, by weight, 60 to 97%, preferably 70 to 95%, of methyl methacrylate homopolymer (1) and / or of copolymer ( 2) mainly containing units derived from the methyl methacrylate monomer and 3 to 40%, preferably 5 to 30%, of substituted or unsubstituted styrene copolymer and of (meth) acrylonitrile and / or of a substituted or unsubstituted styrene copolymer and maleic anhydride (SMA) and / or a copolymer of substituted or unsubstituted styrene and maleimide.
- a mixture (3) comprising, by weight, 60 to 97%, preferably 70 to 95%, of methyl methacrylate homopolymer (1) and / or of copolymer ( 2) mainly containing units derived from the methyl methacrylate monomer and 3 to 40%, preferably
- the copolymer of substituted or unsubstituted styrene and (meth) acrylonitrile is advantageously formed, by weight, from 8 to 35% of (meth) acrylonitrile and from 65 to 92% of substituted or unsubstituted styrene.
- the copolymer of substituted or unsubstituted styrene and maleic anhydride (SMA) is advantageously formed, by weight, from 8 to 33% of maleic anhydride and from 67 to 92% of substituted or unsubstituted styrene.
- the copolymer of substituted or unsubstituted styrene and maleimide which can be used in the invention is advantageously formed, by weight, from 8 to 21% of maleimides and from 79 to 92% of substituted or unsubstituted styrene.
- maleimides there may be mentioned N-cyclohexylmaleimide or N-isopropylmaleimide.
- substituted styrene of these copolymers use may be made of the alpha-methylstyrene, monochlorostyrene and tert-butylstyrene monomers.
- thermoplastic resin (a) can also consist of a glutarimide polymer (4) comprising imide units of formula:
- RI, R2 and R3 are the same or different and may be hydrogen or a substituted or unsubstituted alkyl, aryl, alkaryl or aralkyl group having from 1 to 20 carbon atoms.
- the substituents can be chosen from halogen atoms and methyl, ethyl, hydroxyl, methoxy, ethoxy, carboxyl and ethylcarbonyl groups. The degree of imidation is at least 40%.
- thermoplastic resin (a) a mixture of polymers, as described in document EP-A-515095, which comprises a copolymer with glutarimide groups and a copolymer of styrene or substituted styrene and of
- the mixture can comprise, by weight, from 40 to 85% of glutarimide polymer and from 15 to 60% of (meth) acrylonitrile.
- thermoplastic resin (a) is used, a copolymer (2) mainly containing units derived from the methyl methacrylate monomer.
- Such copolymers are described in documents WO 98/57799 and WO 99/65671.
- the thermoplastic resin (a) generally has a mass average molar mass (Mw), measured by steric exclusion chromatography using standards of methyl methacrylate homopolymer for calibration, of between 50,000 and 200,000 g / mol , preferably 60,000 and 140,000 g / mol.
- Mw mass average molar mass
- the thermoplastic polymeric material which is used for the production of molded discs for audio and / or optical information recording media, in accordance to the invention, further comprises at least one impact modifier compound (also called impact enhancer additive) whose average size is between 10 and 200 nm, preferably between 40 and 150 nm and, in particular between 80 and 120 nm.
- shock boosters are products based on elastomeric materials.
- These impact reinforcing additives are generally polymeric substances having a structure with several layers, at least one being constituted by an elastomer phase. Since it is the elastomer phase contained in the additive which imparts impact resistance, this additive is added to the fragile thermoplastic material to have a suitable proportion of the elastomer.
- the impact reinforcing component also called impact modifier
- useful in the invention can consist of a block copolymer comprising at least one elastomer block resulting from the polymerization of monomers such as butadiene, substituted or not, alkyl acrylates or aralkyl.
- It can be in particular a bis-sequenced copolymer, such as poly (butadiene-block-methyl methacrylate) or a tri-sequenced copolymer such as poly (styrene-block-butadiene-block-methyl methacrylate) in which the elastomeric polybutadiene phase represents up to Approximately 50% by weight of the mass of the block copolymer.
- the butadiene block can be non-hydrogenated, partially or completely hydrogenated. It can also be a poly (methyl methacrylate - block - butyl acrylate - block - methyl methacrylate), copolyetheresteramides with polyamide and polyether blocks, copolymers with polyester and polyether blocks.
- the impact reinforcing component can also be a polymeric substance having a structure with several layers, at least one of which consists of an elastomer phase. These polymeric substances can thus be particles obtained by coagulation, by drying, by spraying or atomization of an elastomer latex.
- the manufacture of such latexes, used for impact reinforcement of thermoplastic matrices is well known to those skilled in the art. It is known in particular that by modifying the conditions of manufacture of these latexes, one can act on their morphology and, consequently, on their ability to improve the impact resistance and on their ability to maintain the optical properties of the matrix. to reinforce.
- elastomer latex The different morphologies of elastomer latex known to date can be used without disadvantage in the context of the present invention.
- a latex of “soft-hard” morphology the first phase (or core) of which is elastomer. and whose final "hard” phase (or outer layer) is a fragile thermoplastic.
- These latexes can be obtained in two stages, for example, in a first stage, by emulsion polymerization, in aqueous medium, in the presence of an initiator generating free radicals and of an emulsifying agent, of at least one monomer.
- soft that is to say a monomer leading to a polymer having a glass transition temperature below 25 ° C.
- elastomer phase chosen for example from monomers such as butadiene, substituted or not , and alkyl or aralkyl acrylates in which the alkyl group has from 1 to 15 carbon atoms and, in a second stage, also by emulsion polymerization, in the presence of the polymer of the first stage, at least at least one monomer which should constitute a "hard” phase compatible with the fragile thermoplastic polymer (matrix) for which the impact resistance is to be improved.
- This or these monomers can be chosen, for example, from alkyl methacrylates in which the alkyl group comprises from 1 to 4 carbon atoms, vinyl aromatic monomers such as styrene and substituted styrenes, acrylonitrile and methacrylonitrile monomers.
- the "hard” phase can also be obtained from a mixture of previous hard monomers (in majority amount) and ethylenically unsaturated comonomer (s), such as a lower alkyl acrylate or acid (meth )acrylic.
- the polymerization of the monomers which do not constitute the final "hard” phase may be carried out in the presence of other polyfunctional monomers with ethylenic unsaturations copolymerizable with them, in particular crosslinking and / or grafting monomers.
- the polymer constituting the final "hard” phase can be formed in the presence of crosslinking monomer.
- crosslinking monomers which can be used, mention may be made of polyacrylates and polymethacrylates of polyols, such as diacrylates and alkylene glycol dimethacrylates; as grafting monomers which can be used, mention may be made of allyl esters, such as allyl acrylate and methacrylate.
- the elastomeric phase can be prepared from a mixture comprising by weight, at least 50% of alkyl or aralkyl acrylate in which the alkyl group has from 1 to 15 carbon atoms, 0.05 to 5.0% of a crosslinking monomer, 0.05 to 5% of grafting monomers, 0 to 10% of a hydrophilic monomer (such as amides and hydroxylated alkyl esters of methacrylic acid, acid (meth) acrylic), the remainder optionally consisting of other ethylenically unsaturated copolymerizable monomers (such as styrene);
- the final brittle thermoplastic phase, polymerized in the presence of the elastomer phase can be obtained from a mixture of monomers comprising at least 50% by weight of alkyl methacrylate, the elastomer phase and the thermoplastic phase having a minimum degree of chemical binding of around 20%.
- a latex of “hard-soft-hard” morphology the first phase of which (core or core), non-elastomer, is polymerized from monomers which may constitute the methacrylic (co) polymer material to be reinforced (a) or the previously mentioned “hard” final phase, the intermediate phase of which is elastomeric, obtained for example from the so-called “soft” monomers mentioned above, and the final phase of which is formed from monomers which can be used for the methacrylic (co) polymer material (a) or the "hard” final phase mentioned above.
- 3,793,402 is suitable which is formed (1) from a non-elastomeric core constituted by a copolymer obtained from 80 to 100% by weight of at least one so-called "hard” monomer. , such as an alkyl methacrylate (C 1-4 alkyl), styrene, (meth) acrylonitrile optionally combined (0-30% by weight) with one or more ethylenically unsaturated comonomers, such as a lower alkyl (meth) acrylate (C1-4 alkyl) and (meth) acrylic acid, 0 to 10% by weight of a polyfunctional crosslinking monomer and 0 to 10% by weight of a grafting monomer, such as those mentioned above, ( 2) an elastomeric intermediate layer, formed in the presence of the polymer (1), from 50 to 99.9% by weight of substituted or unsubstituted butadiene monomer (s) and / or alkyl acrylate in which the group alkyl has from 1 to 8 carbon
- a product of soft / hard / soft / hard morphology as described in document EP-B-270865 which comprises (1) a central core based on a crosslinked elastomer intimately mixed with a thermoplastic resin (co ) methacrylic polymer, (2) a first optional layer of said resin grafted onto the central core, (3) a second layer of crosslinked elastomer grafted onto said first layer or onto said core and (4) a third layer of resin grafted onto said second layer of crosslinked elastomer.
- Other usable morphologies are those, more complex, described in patents US-A-4052525 and FR-A-2446296.
- the impact reinforcing component (b) used in the invention is advantageously in the form of a multi-layer composite copolymer.
- thermoplastic polymer material may optionally contain usual additives, such as lubricant, UV stabilizer, in an amount of 0% to 1% by weight relative to the total weight of the material.
- thermoplastic polymer material is advantageously in the form of granules allowing the manufacture of the molded discs according to the invention, by injection or injection-compression.
- the thermoplastic resin (a) when it is formed by a methacrylic (co) polymer, can be obtained by any known method, for example by suspension or bulk polymerization. It can be in the form of granules or pearls.
- the pearls are obtained by the well-known process of polymerization in aqueous suspension of the monomer (s) in the presence of an initiator soluble in the monomer (s) and of a suspending agent.
- the granules can be obtained from these beads which are melted in an extruder to form rods; these are then cut into granules.
- the granules can also be prepared by mass polymerization, a well-known process, consisting in polymerizing the monomer (s) or else a prepolymer syrup dissolved in the monomer (s), in the presence of an initiator.
- the polymer obtained is forced at the end of the line into a die to obtain rods which are then cut into granules.
- a chain transfer agent to control the molar mass of the polymer and, optionally other usual additives.
- thermoplastic polymer material used according to the invention can be obtained by hot mixing of the granules and / or beads of thermoplastic resin (a), in particular of methacrylic (co) polymers, of at least one impact modifier compound (b ) usually in powder form, and possibly other additives such as lubricants, UV stabilizers.
- This mixing can be carried out in any suitable device, for example in an extruder, generally at a temperature of the order of 220 ° C.
- the mixture is then in the form of granules which can be used to make injection-compression molded discs.
- the molded discs according to the invention can be obtained, by any known method and in particular, by injection molding or injection-compression of the granules in an injection molding machine at a temperature of at least 250 ° C. as described in the WO 98/57799.
- the present invention also relates to molded discs suitable as recording media for audio and / or optical information (such as DVDs), comprising at least one molded disc as described above.
- DVD discs are typically obtained by combining, by means of an adhesive, a first molded disc metallized by sputtering and a second molded disc, possibly metallized.
- the present invention also relates to a new thermoplastic polymer material, which is useful in particular for the manufacture of molded discs for information recording media, the said material being as defined above, and further characterized in that it includes by weight:
- thermoplastic resin chosen from:
- a glutarimide polymer optionally in admixture with a copolymer of substituted or unsubstituted styrene and (meth) acrylonitrile and (b) from 15 to 30%, of at least one impact modifier compound which is in the form of particles with an average size of between 10 and 200 nm, preferably between 40 and 150 nm.
- FIG. 1 is a diagram representing a test piece, produced from the thermoplastic polymer material, to be subjected to a tensile test according to test No. 1 described later to measure the resistance to cracking of said test piece.
- the test piece is represented in the form of a rectangle of width "L”.
- Halfway along the test piece are 2 notches "a”. The distance between the ends of these 2 notches is equal to L - 2a and corresponds to the length of the "ligament" to be broken.
- Figure 2 is a diagram of an assembly for measuring the crack resistance of a disc according to test No. 2 described later.
- a disc (1) of which one wants to evaluate the resistance to cracking a punch (2) provided with 2 fins (3) forming an angle of 30 ° with the vertical direction of the punch, this punch comprising one end in the form of a ball (4) with a diameter of 14 mm.
- This punch is placed near the center of the disc for its impact on this part of the disc.
- Figures 3 to 5 show a view by atomic force microscopy of the replication of "pits" on DVD discs obtained in Examples 1 and 2 (controls) and 3 (according to the invention).
- the crack resistance was evaluated by the following tests:
- test n ° l Test on test piece
- thermoplastic polymer material obtained by hot mixing of granules of thermoplastic resin (a) and impact modifier (b) were baked for 4 h. at 70 ° C. They were then extruded in the form of a strip using a FAIREX type single screw, without degassing well and equipped with an appropriate flat die. The strips, 35 mm wide and 0.6 mm thick (E), were cooled by a non-thermostatically controlled calender.
- test pieces ready to be tested must lie within the limits given by 0.45 x L / 2 ⁇ a ⁇ 0.55 x L / 2.
- the distance (L - 2a) represents the length of the "ligament" to be broken.
- test piece was then conditioned for 24 hours (at 23 ° C and 50% relative humidity).
- test conditions The mechanical tests were carried out on an ADHAMEL DY30 testing machine from the company MTS. During the tensile test, the test piece was held by two clamping jaws. Test conditions:
- the fracture toughness, G or resilience was calculated using the following equation, i.e. from work W (carried out until the crack propagates in the absence additional stress) divided by the area of ruptured ligament:
- W is the work done (area under the Force-displacement curve)
- E is the thickness of the test piece (L - 2a) is the length of the ruptured ligament.
- the cracking resistance measured on DVD discs, was measured using an MTS 831 testing machine from the MTS Company according to the principle shown in Figure 2. Testing and mounting machine:
- the disc (1) with a diameter of 108 mm, was held between four diametrically opposite support points (not shown in the diagram) and was stressed in its center by the intermediate of the punch (2).
- Test conditions The tests were carried out at 23 ° C and at a test speed of 10 mm / min. A minimum of five tests were carried out for each material.
- the resistance to cracking was calculated from the work W carried out until the moment when a crack propagates, in the absence of additional stress, from the center of the disc.
- W expressed in J, represents the work carried out (area under the force-displacement curve).
- Granules of the methyl methacrylate-ethyl acrylate copolymer were used.
- the fracture toughness (G) was evaluated according to the no. 1 cracking test mentioned above. It was 1.71 ⁇ 0.26 h ⁇ / rn 2 . These granules were then injected onto a production line for video discs (DVDs) from the Singulus Company. The thickness of the DVD was 1.2 mm. The cracking resistance, measured according to test No. 2 for cracking resistance on DVD, was 14 mJ ⁇ 3. The replication of the “pits” was checked by atomic force microscopy. The replication is excellent (see Figure 3).
- This impact modifier was in the form of three-layer granules having the composition described in Example 2 of USP 3793402, that is to say: a core formed from a methyl methacrylate copolymer (99.8%) and allyl methacrylate (0.2%), an intermediate layer formed from copolymer of butyl acrylate (79.4%), styrene (18.6%) and allyl methacrylate (0.2% ) and an outer layer formed from a copolymer of methyl methacrylate (96%) and ethyl acrylate (4%), the weight distribution of the core, the intermediate layer and the outer layer being 30 respectively %, 50% and 20%.
- the average size of the impact modifier powder was 300nm.
- the refractive index was 1.49.
- the granules obtained were extruded in a strip as in Example 1.
- the fracture toughness G was evaluated according to the no. 1 cracking test mentioned above. It was 20.13 ⁇ 4.35 K / m 2 .
- a BUSS 11D co-kneader fitted with a weight metering device 80 parts by weight of granules of a methyl methacrylate-ethyl acrylate copolymer were mixed in an extruder at a temperature of about 220 ° C. (97/3% by weight) of average molar mass by mass 75,000 g / mol and 20 parts by weight of the impact modifier in powder form.
- the impact modifier was a two-layer compound: soft core / hard shell (70% / 30% by weight) in which the core consisted of a butyl acrylate / butadiene copolymer (48% / 52% by weight) and the bark was constituted by a methyl methacrylate / ethyl acrylate copolymer (96% / 4% by weight).
- the average size was 100nm.
- the refractive index was 1.49.
- the granules obtained were extruded in a strip as in Example 1.
- the fracture toughness G was evaluated according to the no. 1 cracking test mentioned above. It was 57.10 ⁇ 6.48 K / m2. These granules were then injected onto a production line for video discs (DVDs) from the Singulus Company. The thickness of the DVD was 1.2 mm.
- the replication of the "pits" was checked by atomic force microscopy. The replication was excellent (see Figure 5).
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Abstract
Description
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Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2002350863A AU2002350863A1 (en) | 2001-10-31 | 2002-10-30 | Thermoplastic polymer material for audio and/or optical data recording media |
| US10/494,192 US20050013962A1 (en) | 2001-10-31 | 2002-10-30 | Thermoplastic polymer material for audio and/or optical information recording media |
| JP2003540251A JP2005507539A (ja) | 2001-10-31 | 2002-10-30 | オーディオ/光データ記録媒体用の熱可塑性ポリマー材料 |
| EP02785574A EP1448706A2 (fr) | 2001-10-31 | 2002-10-30 | Materiau polymere thermoplastique et disques moules |
| MXPA04004088A MXPA04004088A (es) | 2001-10-31 | 2002-10-30 | Material polimerico termoplastico para soportes de registro de informacion audio y/u optica. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR01/14134 | 2001-10-31 | ||
| FR0114134A FR2831546B1 (fr) | 2001-10-31 | 2001-10-31 | Materiau polymere thermoplastique pour supports d'enregistrement d'informations audio et/ou optiques |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2003037983A2 true WO2003037983A2 (fr) | 2003-05-08 |
| WO2003037983A3 WO2003037983A3 (fr) | 2004-01-22 |
Family
ID=8868958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2002/003751 Ceased WO2003037983A2 (fr) | 2001-10-31 | 2002-10-30 | Materiau polymere thermoplastique et disques moules |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US20050013962A1 (fr) |
| EP (1) | EP1448706A2 (fr) |
| JP (1) | JP2005507539A (fr) |
| KR (1) | KR100629666B1 (fr) |
| CN (1) | CN1311026C (fr) |
| AU (1) | AU2002350863A1 (fr) |
| FR (1) | FR2831546B1 (fr) |
| MX (1) | MXPA04004088A (fr) |
| WO (1) | WO2003037983A2 (fr) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005090477A1 (fr) * | 2004-02-17 | 2005-09-29 | Arkema France | Disques moules pour supports d’enregistrement d’informations a base de copolymeres blocs nanostructures |
| FR2908417A1 (fr) * | 2006-11-13 | 2008-05-16 | Arkema France | Composition methacrylique permettant d'obtenir un revetement au toucher rugueux et d'aspect mat. |
| KR101017235B1 (ko) | 2003-10-17 | 2011-02-25 | 에보니크 룀 게엠베하 | 중합체 혼합물 및 이를 사용하여 제조된 사출 성형품 |
| EP3632938B1 (fr) * | 2018-10-05 | 2023-05-03 | Trinseo Europe GmbH | Monomère aromatique à vinylidène substitué et polymères d'esters (méth)acrylates cycliques |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004355732A (ja) * | 2003-05-29 | 2004-12-16 | Tdk Corp | 光記録媒体 |
| US7552854B2 (en) * | 2006-05-19 | 2009-06-30 | Applied Medical Resources Corporation | Surgical stapler with firing lock mechanism |
| KR101190981B1 (ko) | 2007-09-18 | 2012-10-15 | 주식회사 엘지화학 | 내열성이 우수한 광학 이방성 필름 및 이를 포함하는 액정디스플레이 장치 |
| JP5968327B2 (ja) * | 2010-11-02 | 2016-08-10 | スリーエム イノベイティブ プロパティズ カンパニー | 反射物品及びこれを作製する方法 |
| WO2013115977A1 (fr) * | 2012-01-31 | 2013-08-08 | 3M Innovative Properties Company | Films et articles réfléchissants et leurs procédés de fabrication |
| KR20140086729A (ko) * | 2012-12-28 | 2014-07-08 | 제일모직주식회사 | 투명 열가소성 수지 조성물 및 이를 이용한 성형품 |
| WO2017178210A1 (fr) * | 2016-04-12 | 2017-10-19 | Sabic Global Technologies B.V. | Composition polymère comprenant du poly(méthacrylate de méthyle) et une composition d'agent antichoc |
| WO2018016306A1 (fr) * | 2016-07-22 | 2018-01-25 | デンカ株式会社 | Composition de résine et film formé de ladite composition de résine |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3681475A (en) * | 1969-10-06 | 1972-08-01 | Rohm & Haas | Thermoplastic molding compositions |
| FR2092389A5 (fr) * | 1970-04-13 | 1972-01-21 | Rohm & Haas | |
| US4108923A (en) * | 1974-07-05 | 1978-08-22 | The Goodyear Tire & Rubber Company | Poly(methyl methacrylate) composition |
| JPH0798883B2 (ja) * | 1986-09-25 | 1995-10-25 | 三菱レイヨン株式会社 | 樹脂組成物 |
| JP2767041B2 (ja) * | 1988-08-05 | 1998-06-18 | 三菱レイヨン株式会社 | 耐衝撃性樹脂組成物 |
| US4959408A (en) * | 1988-11-09 | 1990-09-25 | Grant Frank O | Poly(methyl methacrylate) blended with a solid poly(butyl acrylate-co-allyl acrylate) plasticizer |
| US5328962A (en) * | 1989-03-13 | 1994-07-12 | Ici Acrylics, Inc. | High heat acrylics |
| US5073615A (en) * | 1989-03-13 | 1991-12-17 | Continental Polymers, Inc. | High temperature heat resistant acrylics |
| EP0414258B1 (fr) * | 1989-08-25 | 1995-06-28 | Mitsui Petrochemical Industries, Ltd. | Médium d'enregistrement d'information et composition adhésive utilisée |
| JP3396240B2 (ja) * | 1992-05-25 | 2003-04-14 | 住友化学工業株式会社 | メタアクリル樹脂組成物 |
| EP0847421B1 (fr) * | 1995-08-31 | 1999-07-21 | Basf Aktiengesellschaft | Matieres de moulage thermoplastiques a lumiere diffusee reduite |
| CN1150232C (zh) * | 1995-10-27 | 2004-05-19 | 东丽株式会社 | 耐冲击性树脂组合物的制造方法 |
| FR2742660B1 (fr) * | 1995-12-22 | 1998-04-03 | Ethypharm Lab Prod Ethiques | Nouvelles formes de microgranules a liberation prolongee contenant du diltiazem comme principe actif |
| FR2743078B1 (fr) * | 1995-12-28 | 1998-01-30 | Atohaas Holding Cv | Composition de resine methacrylique thermoplastique rigide et articles presentant une resistance amelioree aux agents fissurants, obtenus a partir de cette composition |
| FR2804439B1 (fr) * | 2000-02-01 | 2002-03-29 | Atofina | Compositions resistantes au choc a base de (co)polymere methacrylique thermoplastique, procedes pour les preparer et article faconnes obtenus a partir de ces compositions |
-
2001
- 2001-10-31 FR FR0114134A patent/FR2831546B1/fr not_active Expired - Fee Related
-
2002
- 2002-10-30 MX MXPA04004088A patent/MXPA04004088A/es unknown
- 2002-10-30 CN CNB028265661A patent/CN1311026C/zh not_active Expired - Fee Related
- 2002-10-30 EP EP02785574A patent/EP1448706A2/fr not_active Withdrawn
- 2002-10-30 AU AU2002350863A patent/AU2002350863A1/en not_active Abandoned
- 2002-10-30 WO PCT/FR2002/003751 patent/WO2003037983A2/fr not_active Ceased
- 2002-10-30 KR KR1020047006553A patent/KR100629666B1/ko not_active Expired - Fee Related
- 2002-10-30 JP JP2003540251A patent/JP2005507539A/ja active Pending
- 2002-10-30 US US10/494,192 patent/US20050013962A1/en not_active Abandoned
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101017235B1 (ko) | 2003-10-17 | 2011-02-25 | 에보니크 룀 게엠베하 | 중합체 혼합물 및 이를 사용하여 제조된 사출 성형품 |
| WO2005090477A1 (fr) * | 2004-02-17 | 2005-09-29 | Arkema France | Disques moules pour supports d’enregistrement d’informations a base de copolymeres blocs nanostructures |
| FR2908417A1 (fr) * | 2006-11-13 | 2008-05-16 | Arkema France | Composition methacrylique permettant d'obtenir un revetement au toucher rugueux et d'aspect mat. |
| WO2008059157A1 (fr) * | 2006-11-13 | 2008-05-22 | Arkema France | Composition methacrylique permettant d'obtenir un revetement au toucher rugueux et d'aspect mat |
| EP3632938B1 (fr) * | 2018-10-05 | 2023-05-03 | Trinseo Europe GmbH | Monomère aromatique à vinylidène substitué et polymères d'esters (méth)acrylates cycliques |
Also Published As
| Publication number | Publication date |
|---|---|
| US20050013962A1 (en) | 2005-01-20 |
| CN1311026C (zh) | 2007-04-18 |
| FR2831546B1 (fr) | 2007-03-23 |
| WO2003037983A3 (fr) | 2004-01-22 |
| KR100629666B1 (ko) | 2006-09-29 |
| EP1448706A2 (fr) | 2004-08-25 |
| CN1630688A (zh) | 2005-06-22 |
| JP2005507539A (ja) | 2005-03-17 |
| AU2002350863A1 (en) | 2003-05-12 |
| MXPA04004088A (es) | 2004-07-08 |
| FR2831546A1 (fr) | 2003-05-02 |
| KR20050042036A (ko) | 2005-05-04 |
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