WO2001010941A1 - Mousse de resine thermoplastique et procede de fabrication - Google Patents
Mousse de resine thermoplastique et procede de fabrication Download PDFInfo
- Publication number
- WO2001010941A1 WO2001010941A1 PCT/JP2000/005281 JP0005281W WO0110941A1 WO 2001010941 A1 WO2001010941 A1 WO 2001010941A1 JP 0005281 W JP0005281 W JP 0005281W WO 0110941 A1 WO0110941 A1 WO 0110941A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- thermoplastic resin
- layered silicate
- chemical substance
- weight
- foam
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/0016—Granular materials, e.g. microballoons
- C04B20/002—Hollow or porous granular materials
- C04B20/0024—Hollow or porous granular materials expanded in situ, i.e. the material is expanded or made hollow after primary shaping of the mortar, concrete or artificial stone mixture
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/04—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B26/045—Polyalkenes
-
- 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
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0066—Use of inorganic compounding ingredients
-
- 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
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
Definitions
- the present invention relates to a thermoplastic resin foam containing a thermoplastic resin and a layered silicate and a method for producing the same, and more particularly, to a thermoplastic resin foam in which uniformly fine foam cells are uniformly dispersed, and a method for producing the same.
- thermoplastic resin in order to improve properties such as mechanical properties, thermal characteristics, and gas barrier properties of the thermoplastic resin.
- layered silicate that constitutes the clay mineral extremely fine flaky crystals are aggregated by ionic bonds.
- the properties of the thermoplastic resin are improved by separating the aggregated structure by chemical or physical means and uniformly dispersing the flaky crystals in the thermoplastic resin.
- Japanese Patent Publication No. Hei 8-2-29466 discloses that the distance between layers is increased in advance by intermixing aminocarboxylic acid with a layered silicate, and then the polyamide monomer It is disclosed that a structure in which lamellar silicate flakes are uniformly dispersed in a polyamide resin can be formed by inserting polyprotatatam between layers and simultaneously performing polycondensation.
- Japanese Patent Application Laid-Open No. 9-189390 discloses that a layered silicate is polymerized by mixing an organic dispersion obtained by swelling and dispersing an organically modified layered silicate with a vinyl polymer compound in a dissolved state. Dispersion methods are disclosed therein. Japanese Patent Application Laid-Open No.
- H10-182882 discloses that an organically modified layered silicate, a polyolefin oligomer containing a hydrogen bonding functional group, and a polyolefin polymer are melt-kneaded to form an interlayer of the layered silicate. It is disclosed that can prepare a polyolefin-based resin composite in which the polymer swells infinitely in a polymer.
- resin is used as a foam to reduce the weight and cost of the resin or to impart design properties.
- foam is used to improve the mechanical strength, heat insulation performance, shock absorption performance, etc. of the foam. It has been conventionally performed to include an inorganic filler therein.
- Japanese Unexamined Patent Publication No. Hei 8-143697 discloses that physical properties such as strength of the foam are improved by adding a layered silicate to a polypropylene foam composition. I have.
- the use of a solvent is indispensable, and the resulting composite material has a sufficient strength such as a flexural modulus, probably because the remaining solvent is not completely removed. I could not say that.
- this prior art method is practically difficult to implement industrially because it involves complicated steps such as a polymer dissolving step, an organically modified layered silicate swelling step, and a solvent removing step. .
- the hydroxyl groups of the layered silicate are not necessarily efficiently treated by the functional groups of the polyolefin oligomer. I got it. Therefore, a large amount of polyolefin oligomer was required in order to actually achieve uniform dispersion of the layered silicate. It is not preferable that a large amount of such an oligomer component is contained in the polymer in view of physical properties and cost.
- Japanese Patent Application Laid-Open No. 8-1443697 discloses a polypropylene foam having a high expansion ratio and a high strength by including a layered silicate having a blowing agent adsorbed in a polypropylene foam composition. It is disclosed that it can be obtained. However, no consideration is given to disintegrating the agglomerated structure of the layered silicate and uniformly dispersing the flaky crystals in the resin, and the effect of blending the layered silicate has not been sufficiently obtained. In addition, a specific blowing agent must be adsorbed to the layered silicate in advance, and such multi-stage processing is required, and thus the productivity is reduced. In addition, it is essential to use a silane coupling agent, which is costly and easily binds to moisture in the air, making it unstable and difficult to handle.
- the present invention has been made in view of the problems of the above-mentioned conventional thermoplastic foam composition comprising a thermoplastic resin and a layered silicate, and a method for producing the same, wherein foam cells and a layered silicate are uniformly and finely dispersed.
- An object of the present invention is to provide a thermoplastic resin foam containing a thermoplastic resin and a layered silicate, and a method for producing the same. Disclosure of the invention
- thermoplastic resin foam comprising, as main components, 100 parts by weight of a thermoplastic resin and 0.1 to 50 parts by weight of a layered silicate.
- an average interlayer distance of the layered silicate detected by X-ray diffraction measurement is 6 OA or more.
- XZ (Y-1) 1/3 is 30 m or less.
- thermoplastic resin a polyolefin-based resin is used as the thermoplastic resin.
- the polyolefin-based resin includes a group consisting of polyethylene, ethylene- ⁇ -olefin copolymer, ethylene-propylene copolymer, polypropylene, and propylene- ⁇ -olefin copolymer. At least one selected from the group consisting of:
- the composite containing 100 parts by weight of the thermoplastic resin and 0.1 to 50 parts by weight of the layered silicate is formed of the composite material.
- a method comprising: impregnating a silicate layer with a volume-expandable chemical substance; and forming a cell by expanding the volume of the chemical substance in the composite to obtain a thermoplastic resin foam. Is done.
- the step of impregnating the chemical substance is performed by impregnating a gaseous chemical substance under high pressure at normal temperature and normal pressure, and expanding the volume of the chemical substance in the composite. At this time, the chemical substance is vaporized in a composite.
- the gaseous chemical substance in impregnated in a supercritical state at normal temperature and normal pressure, is impregnated in a supercritical state at normal temperature and normal pressure.
- the composite material containing 100 parts by weight of a thermoplastic resin and 0.1 to 50 parts by weight of a layered silicate, wherein the pyrogenic foaming agent is a layered silica Providing a composite containing a pyrolytic foaming agent between the layers of the salt, and a temperature higher than the temperature at which the pyrolytic foaming agent decomposes the composite.
- thermoplastic resin According to still another broad aspect of the production method according to the present invention, a thermoplastic resin
- the chemical substance which is a gas at normal temperature and normal pressure is impregnated in a supercritical state in an injection molding machine.
- the layered silicate used is one in which the layers are made hydrophobic.
- the most remarkable point in the present invention is that the chemical substance between the layers of the layered silicate is volume-expanded in the resin, whereby the flaky crystals of the layered silicate are uniformly dispersed in the organic polymer, and a fine foamed structure is formed. It can be easily formed.
- the flaky crystals 2 and 3 of the layered silicate 1 are surrounded by ions such as silicon, for example, like montmorillonite shown in FIG. And OH groups, with six oxygen ions coordinated around ions such as aluminum, and OH groups.
- Each flaky crystal 2, 3 has a crystal surface (B)
- the cations, such as sodium calcium, are arranged on the (B) and are linked by ionic bonding force.
- ions such as sodium and calcium on the crystal surface (B) Since it has an ion exchange property with a cationic substance, various substances having a cationic property can be inserted between layers. By utilizing this property, it is possible to ion-exchange the ion with a ionic surfactant, and by using a highly non-polar cation species as the cationic surfactant used for this, the layered silicate can be used.
- the salt (B) is depolarized, and the phyllosilicate in the nonpolar polymer is easily dispersed.
- a volume-expandable chemical substance is inserted between the layers of the thermoplastic resin and the layered silicate or thermally decomposed between the layers of the layered silicate. Including the type of substance. Subsequently, the volume expansion of the chemical substance or the decomposition of the pyrolytic foaming agent by heating provides sufficient energy to separate the flaky crystals. Further, as schematically shown in FIG. 3, according to the present invention, the gas as the chemical substance or the gas resulting from the decomposition of the pyrolytic blowing agent is contained in the composite of the thermoplastic resin and the layered silicate 5.
- the flaky crystal 5A of the layered silicate acts as a partition, so that excessive diffusion of gas from between the thermoplastic resin molecular chains 4 is suppressed. Thereby, a foam in which the foam cells 6 are finely and uniformly dispersed is inevitably obtained. Further, since excessive diffusion of gas is suppressed, outgassing hardly occurs, so that a high expansion ratio can be obtained inevitably.
- the expansion ratio Y of the thermoplastic resin foam according to the present invention is preferably 1.01 to 100, and in this range of the expansion ratio Y, the average cell diameter of the thermoplastic resin foam is X (Mm). Preferably satisfies the following equation (1). Average cell diameter XZ (expansion ratio Y—1) 1/3 ⁇ 30 ⁇ ⁇ ⁇ (1) If the value of the above formula (1) exceeds 30, the heat insulating performance, compressive strength, bending of the thermoplastic resin foam Physical properties such as creep decrease.
- the above-mentioned layered silicate means a silicate mineral having a plurality of layers composed of a large number of fine flaky crystals and having exchangeable cations between the layers.
- This flaky crystal usually has a thickness of about 1 nm and a ratio of its major axis to its thickness (hereinafter referred to as aspect ratio) is about 20 to 200.
- aspect ratio a ratio of its major axis to its thickness
- the type of layered silicate having exchangeable cations between the layers is not particularly limited.
- swelling mica swelling my ability
- a swellable smectite clay mineral or swellable mica is used.
- two or more kinds of the above layered silicates may be used in combination.
- the flaky silicate crystal of the layered silicate acts as a partition wall to suppress bubble growth and suppress outgassing, it has a high aspect ratio.
- a layered silicate in which flaky crystals are aggregated a fine cell structure and a high expansion ratio can be realized.
- a layered silicate having a flaky crystal with an aspect ratio of 100 or more is preferable, and particularly a montmorillonite having a flaky crystal with an aspect ratio of about 100 or more.
- a swellable my force having a value of about 150 and an aspect ratio is more preferably used.
- the above-mentioned layered silicate has a hydrophobic layer between layers.
- a non-polar resin such as a polyolefin resin
- a high affinity is obtained between the layered silicate and the thermoplastic resin.
- Examples of the method for making the layers hydrophobic include the following methods (1) to (3).
- the exchangeable cations existing between the layers of the layered silicate are ions such as sodium and calcium, and these ions are exchangeable cations of the cationic surfactant. And has ion exchangeability. Therefore, various cationic surfactants having exchangeable cations can be inserted between the layers.
- the crystal surface of the layered silicate is made nonpolar or low-polarized.
- the dispersibility of the layered silicate in the non-polar resin which is polarized can be enhanced.
- the exchangeable cation is generally an alkali metal or alkaline earth metal ion such as sodium or calcium, and the exchangeable cation is more than the exchangeable cation. Mean or equivalent Are used.
- the concentration of the exchangeable cation may be higher than the concentration of the exchangeable cation.
- a hydroxyl group present on the crystal surface of the layered silicate is chemically bonded to the hydroxyl group or a functional group having chemical affinity, and Z or a reactive functional group.
- the crystal surface of the layered silicate is an anionic surfactant and / or a reagent having anionic surface activity, and contains one or more reactive functional groups other than the anionic site in the molecule.
- Hydrophobized layered silicates are preferably used because they are more easily dispersed in non-polar or low-polar resin such as polyolefin resin than non-hydrophobicized layered silicates.
- the cationic surfactant is not particularly limited, and a commonly used cationic surfactant is used, and examples thereof include those having a quaternary ammonium salt, a quaternary phosphonium salt, or the like as a main component.
- a quaternary ammonium salt having an alkyl chain having 8 or more carbon atoms is used. When an alkyl chain having 8 or more carbon atoms is not contained, the alkyl group ammonium ion has strong hydrophilicity, and it is difficult to sufficiently reduce the polarity between the layers of the layered silicate.
- Examples of the quaternary ammonium salt include lauryltrimethylammonium salt, stearyltrimethylammonium salt, trioctylammonium salt, distearyldimethylammonium salt, di-hardened tallow dimethylammonium salt, distearyldibenzylammonium salt. And salt It is.
- the cation exchange capacity of the above-mentioned layered silicate is not particularly limited, but if it is too small, the amount of the cationic surfactant activated by ion exchange between the crystal layers is small, so that sufficient interlayer exchange is possible. It may not be hydrophobized. If it is too large, the bonding strength between the layers of the layered silicate becomes strong, and it may be difficult to delaminate (delaminate) the crystal flakes. It is preferably 100 g.
- the flaky crystal of the layered silicate acts as a partition wall for suppressing bubble growth during foaming. Therefore, if the added amount of the layered silicate is too small, a foam having a fine foamed cell structure cannot be obtained. If the added amount is too large, the bending strength decreases and the production cost increases. It is necessary to use 0.1 to 50 parts by weight, and preferably 2 to 10 parts by weight, per 100 parts by weight of the fat.
- the average interlayer distance of the layered silicate when the layered silicate is dispersed in the thermoplastic resin (layered layer measured by X-ray diffraction)
- the silicate has an average interlayer distance of the (001) plane of 6 OA or more.
- thermoplastic resin is not particularly limited, but a polyolefin resin, an EVA resin, a polystyrene resin, a vinyl chloride resin, an ABS resin, a polyvinyl butyral resin, various rubbers, and the like can be preferably used. . Further, a crystalline resin such as a polyolefin-based resin is more preferably used.
- the crystalline resin Since the crystalline resin has a high shape retention effect due to the presence of crystal parts in the non-molten state, it retains the shape of the foam when the following chemical substance is expanded in volume in the composite of thermoplastic resin and layered silicate It's easy to do.
- the polyolefin resin used in the present invention is particularly limited.
- homopolymer of ethylene, propylene or ⁇ -olefin copolymer of ethylene and propylene; copolymer of ethylene and ⁇ -olefin; copolymer of propylene and ⁇ -olefin; two or more ⁇ -olefins And copolymers of polyolefins.
- ⁇ -olefin examples include 1-butene, 1-pentene, 1-hexene, 4-methylino 1-pentene,
- polyolefin-based resins may be used alone,
- Two or more kinds may be used as a mixture.
- the molecular weight and molecular weight distribution of the polyolefin resin are not particularly limited, and the weight average molecular weight is preferably 5,000 to 5,000,000, more preferably 20,000 to 300,000.
- the molecular weight distribution (weight average molecular weight MwZ number average molecular weight ⁇ ) is preferably
- thermoplastic resin may be alloyed or blended with another type of polymer compound as appropriate.
- a small amount of a polymer compound obtained by graphing a carboxylic acid such as maleic acid may be added to increase the affinity between the thermoplastic resin and the layered silicate in advance.
- the thermoplastic resin used in the present invention may be, for example, an antioxidant, a light stabilizer, an ultraviolet absorber, a lubricant, a flame retardant, an antistatic agent, or the like.
- An additive may be appropriately added. By adding a small amount of a crystal nucleating agent, it is possible to refine the crystal and improve the uniformity of physical properties.
- thermoplastic resin when the thermoplastic resin is a crystalline resin, the chemical substance inserted between the layers of the layered silicate used is in the range of (melting point ⁇ 20) to (melting point + 20 ° C.) In the case of amorphous resin (Glass transition point-20 ° C)
- gaseous organic gaseous organic or none Any gas of the nature can be used.
- gases include, for example, carbon dioxide (carbon dioxide), nitrogen, oxygen, argon or water; or Freon, low molecular weight hydrocarbons, chlorinated aliphatic hydrocarbons, alcohols, benzene, Organic gases such as toluene, xylene and mesitylene are listed.
- a gas that is a gas at normal temperature (23 ° C) and normal pressure (atmospheric pressure) is suitably used.
- the low molecular weight hydrocarbons include pentane, butane, hexane, and the chlorinated aliphatic hydrocarbons include methyl chloride and methylene chloride. Various fluorinated aliphatic hydrocarbons can also be used.
- carbon dioxide is preferably used because gas recovery is unnecessary and handling is safe.
- Carbon dioxide can be made supercritical by relatively low temperature and low pressure, and acts more effectively on dispersion of phyllosilicates in supercritical fluids.
- the supercritical state is a state in which the temperature and pressure are higher than the critical point of the chemical substance to be impregnated.
- gas and liquid There is no distinction between gas and liquid, and it has intermediate properties between gas and liquid and has thermal conductivity. It has the properties of high viscosity, high diffusion rate, and low viscosity. Therefore, a supercritical fluid is suitable for dispersing the layered silicate.
- the above-mentioned chemical substance may be liquid at normal temperature.
- examples of such a chemical substance include saturated hydrocarbons such as pentane, neopentane, hexane and heptane, or methylene chloride, trichloroethylene and dichloroethane.
- Chlorine compounds, fluorine compounds such as CFC-11, CFC-12, CFC-11, and CFC-1441b.
- the method for impregnating the above chemical substance between the layers of the layered silicate of the composite containing the thermoplastic resin and the layered silicate is not particularly limited.For example, a method in which a gas as a chemical substance is sealed in a closed autoclave. And a method of applying pressure. This method uses pressure and temperature controls.
- thermoplastic resin may be charged into a melt extruder, and a vent-type screw may be used as a screw, and the above-described gas may be injected into the vent portion from the middle of the cylinder.
- a vent-type screw may be used as a screw
- the above-described gas may be injected into the vent portion from the middle of the cylinder.
- the pressure of the gas when the chemical substance is impregnated into a composite of a thermoplastic resin and a layered silicate is 9.8 X 10 is preferably 5 P a higher, 9. 8 X 1 0 or 6 P a is more preferred.
- the temperature at which the above-described chemical substance is impregnated into the composite of the thermoplastic resin and the layered silicate is not particularly limited as long as the composite does not deteriorate. In any case, as the temperature is higher, the amount of the chemical substance dissolved in the composite containing the thermoplastic resin and the layered silicate increases, and a higher expansion ratio can be obtained. Therefore, it is preferable that the impregnation temperature is high.
- the thermoplastic resin is a crystalline resin
- the range of (melting point-20 ° C to melting point + 20 ° C) In the case of an amorphous resin, a temperature in the range of (glass transition point—20 ° C. to glass transition point + 20 ° C.) is more preferable.
- thermoplastic resin If the temperature at which the above chemicals are impregnated is higher than ', (melting point + 20 ° C) or (glass transition point + 20 ° C), the molecular motion of the thermoplastic resin is activated and the composite The chemicals dissolved therein will easily escape from the composite. On the other hand, if the temperature at which the chemical is impregnated is lower than the melting point or glass transition point, the molecular motion of the thermoplastic resin may not be sufficient, and the chemical may not be sufficiently dissolved in the composite.
- thermoplastic resin foam according to the present invention is carried out by impregnating the above-mentioned chemical substance into a composite and then expanding the chemical substance in a composite of the thermoplastic resin and the layered silicate.
- the method of expanding the volume of the chemical substance is appropriately selected according to the type of the chemical substance, and the pressure is lowered after impregnating the composite gas with the above-mentioned gas at a relatively high pressure. Or by heating.
- the temperature at which the above-mentioned chemical substance expands in volume in the composite is not particularly limited.
- the temperature is preferably in the range of (melting point ⁇ 150 to melting point + 10 ° C.)
- the glass transition point is preferably in the range of 50 ° C to 50 ° C + 50 ° C.
- the volume expansion temperature is higher than (melting point +10) or (glass transition point +50)
- the volume expansion temperature is lower than the melting point or the glass transition point of 150, the molecular motion of the thermoplastic resin is restricted, and a high foaming ratio cannot be obtained.
- thermoplastic resin composition containing 100 parts by weight of a thermoplastic resin and 0.1 to 50 parts by weight of a layered silicate is charged with a gas at room temperature and normal pressure.
- the chemical substance is impregnated under high pressure in an injection molding machine having a cavity, and then the thermoplastic resin composition impregnated with the chemical substance is injected into the cavity of the injection molding machine, and then the cavity is expanded.
- the thermoplastic resin, the layered silicate, and the chemical substance which is a gas at normal temperature and normal pressure those described above are used. However, there is no need to collect gas and it can be handled safely. And carbon dioxide is preferred.
- the method of impregnating the above-mentioned chemical substance under high pressure in an injection molding machine can also be performed by the method described above.
- the cavity After injecting the thermoplastic resin composition impregnated with the chemical substance into the cavity of the injection molding machine as described above, the cavity is expanded.
- the direction in which the cavities are expanded is preferably a direction perpendicular to the parting surface of the injection mold, since it is only necessary to retract the movable mold, but if necessary, a slide core or the like may be used. May be used to extend in the direction of the parting plane.
- the size of the cavity when expanding the above-mentioned cavity may be appropriately adjusted according to the desired expansion ratio of the foam, but if it is too small, the properties of the foam (light weight, heat insulation, etc.) are exhibited. If it is too large, the thermoplastic resin composition may not be sufficiently distributed to the expanded cavity, and the desired expansion ratio and shape of the foam may not be obtained. 30 times is preferred.
- the time required for expanding the cavities differs depending on the desired expansion ratio, shape, and extension viscosity of the thermoplastic resin composition, and further, there is a limit to means for expanding the cavities. It is preferable to use 0.5 to 5 seconds, since the shorter the foaming, the higher the elongational viscosity, and thus the more the foaming can be prevented.
- the chemical substance is impregnated in the injection molding machine, the chemical substance is brought into a supercritical state, whereby the dispersibility of the flaky crystal of the layered silicate can be further enhanced.
- the pressure applied in the cavity is rapidly released by expanding the cavity. Therefore, the electric power between the layered silicates Energy that overcomes the attractive force is applied, and the flaky crystals of the layered silicate can be exfoliated.
- the chemical substance when a chemical substance is impregnated into a thermoplastic resin composition in a supercritical fluid state, the chemical substance can be rapidly gasified by expanding the cavity. In this case, the volume change from the supercritical state to the gas state is accompanied by rapid and large volume expansion. Therefore, sufficient energy can be applied to exfoliate the flaky crystal of the layered silicate, and the dispersibility of the flaky crystal can be further improved.
- FIG. 4 One embodiment of the manufacturing method of the present invention for forming a foam structure by expanding cavities as described above will be described with reference to FIGS. 4 to 6.
- FIG. 4 One embodiment of the manufacturing method of the present invention for forming a foam structure by expanding cavities as described above will be described with reference to FIGS. 4 to 6.
- FIG. 4 One embodiment of the manufacturing method of the present invention for forming a foam structure by expanding cavities as described above will be described with reference to FIGS. 4 to 6.
- FIG. 4 is a sectional view showing an example of an injection molding machine used in the present embodiment.
- 11 is an injection molding machine
- .12 is an injection mold
- 16 is a vent.
- the injection molding machine used in the present embodiment includes an injection molding machine main body 11 and an injection mold 12.
- the injection molding machine body 11 has a cylinder 14 with a built-in screw 13, a hopper 15 for supplying a thermoplastic resin composition into the cylinder 14, and a gas injection device 6 1 to a cylinder 14.
- a vent section 16 for injecting a chemical substance into the fuel cell is provided.
- FIG. 5 is a cross-sectional view showing a closed state of the injection molding die used in the present embodiment, and FIG. 6 shows a state in which the cavity of the injection molding die is expanded. It is sectional drawing.
- reference numeral 12 denotes a mold for injection molding
- reference numeral 23 denotes a cavity
- the injection mold used in the present embodiment has a fixed mold 21 and a movable mold 22.
- a cavity 23 is formed between the fixed mold 21 and the movable mold 22.
- thermoplastic resin composition is supplied to the hopper 15 of the injection molding machine main body 11 shown in FIG. 4, and the gas is injected from the gas injection device 61 at normal temperature and normal pressure. Chemicals are injected into cylinder 14 through vent 16.
- the chemical substance is impregnated into the thermoplastic resin composition at a high pressure in the cylinder and at a temperature and pressure at which the chemical substance becomes a supercritical state.
- the thermoplastic resin composition by performing pressure sealing with the thermoplastic resin composition in a molten state, it is possible to effectively impregnate the high-pressure or supercritical chemical substance with the thermoplastic resin composition.
- thermoplastic resin composition 25 impregnated with a chemical substance is injected into the cavity 23 from the sprue 24 of the injection mold 12 shown in FIG.
- the movable mold 22 of the injection mold 12 is retracted, and the cavity 23 is expanded.
- FIG. 7 is a sectional view showing another example of the injection molding machine used in the present embodiment.
- reference numeral 17 denotes an airtight container.
- the injection molding machine main body 11 has a cylinder 14 with a built-in screw 13 and heat inside the cylinder 14.
- a hopper 15 for supplying a plastic resin composition and an airtight container 17 for injecting a chemical substance into a cylinder 14 from a gas injection device 70 are provided.
- thermoplastic resin composition was supplied, and a gaseous chemical substance was supplied from the gas injection device 70 at normal temperature and pressure to the hermetic container 17, and supplied into the hopper 15.
- the thermoplastic resin composition is impregnated at a high pressure or at a temperature and pressure at which a chemical substance becomes a supercritical state, and poured into the cylinder 14.
- thermoplastic resin foam can be obtained in the same manner as described with reference to FIGS. 4 to 6.
- thermoplastic resin foam is obtained by preparing a composite containing a pyrolytic foaming agent between layers and heating the composite to a temperature higher than the decomposition temperature of the pyrolytic foaming agent.
- thermoplastic resin and the layered silicate used here those described above can be similarly used.
- the thermal decomposition type foaming agent is a substance which decomposes upon heating to generate gas, for example, azodicarbonamide, benzenesulfonium hydrazide, dinitrosopentamethylenetetramine, toluenesulfonyl hydrazide, 4 , 4-oxybis (benzenesulfonyl hydrazide) and the like.
- the method for incorporating the above-mentioned pyrolytic foaming agent between the layers of the layered silicate is not particularly limited, but for example, the following method can be used.
- Hydrochloric acid acts on the terminal amine of the foaming agent.
- the foaming agent is converted into a quaternary amide, and ion exchange between water and a quaternary amine of a layered silicate containing a metal ion between layers in advance. By doing so, a foaming agent is contained between the layers.
- general-purpose thermal decomposition type foaming agents have amine at the terminal The method is preferably used.
- general-purpose pyrolytic blowing agents often contain sites that form a coordination bond with a metal, such as nitrogen or a carbon-carbon double bond, and this technique is preferably used. .
- the temperature at which the pyrolytic blowing agent is contained between the layers of the layered silicate may be any temperature as long as the composite does not deteriorate and the pyrolytic blowing agent does not decompose.
- the temperature at which the pyrolytic foaming agent is foamed in the thermoplastic resin is not particularly limited.
- thermoplastic resin foam obtained according to the present invention has uniform and fine foam cells because the flaky crystals of the layered silicate act as partition walls during foaming. Therefore, as a foam having uniform and fine foam cells, the thermoplastic resin foam according to the present invention can be suitably used for various applications.
- the thermoplastic resin foam according to the present invention may not be used as it is. That is, when the properties of the foam are not so required, and when the reinforcing effect due to the dispersion of the layered silicate is mainly used, the expansion ratio may be low, or the thermoplastic resin foam according to the present invention may be heated. Alternatively, the foam may be broken by a press or the like and used as a solid body. Further, the thermoplastic resin foam obtained by the present invention may be used as a master batch and provided to the next molding process. BRIEF DESCRIPTION OF THE FIGURES
- FIG. 1 is a schematic perspective view for explaining the structure of a layered silicate used to obtain a thermoplastic resin foam of the present invention.
- FIG. 2 shows that the crystal planes of the layered silicate shown in FIG.
- FIG. 4 is an enlarged schematic view showing a crystal structure of a portion where the light-emitting portion is formed.
- FIG. 3 is a schematic diagram showing a gas diffusion suppression model during foam cell formation.
- FIG. 4 is a sectional view showing an injection molding machine used in one embodiment of the present invention.
- FIG. 5 is a cross-sectional view showing a state in which an injection molding die used in one embodiment of the present invention is clamped.
- FIG. 6 is a cross-sectional view showing a state where the cavity of the injection mold shown in FIG. 5 is expanded.
- FIG. 7 is a sectional view showing an injection molding machine used in another embodiment of the present invention.
- FIG. 8 is a schematic configuration diagram for explaining an extruder used in the present invention. BEST MODE FOR CARRYING OUT THE INVENTION
- the following minerals were used as the layered silicate.
- Swelling strength Swelling strength (manufactured by Corp Chemical Co., Ltd.)
- DS DM-modified montmorillonite Toyshun Mining Co., Ltd.
- DS DM-modified montmorillonite (trade name: Nuesven D, organic substance obtained by ion exchange of all sodium ions between layers of montmorillonite by distearyl dimethyl ammonium chloride) Montmorillo mouth night)
- the following acid-modified polyolefin resin was used to increase the affinity between the thermoplastic resin and the layered silicate, and for comparison with the conventional example.
- Table 1 below shows the raw materials used in Examples 1 to 14 and Comparative Examples 1 to 6.
- thermoplastic resin and the layered silicate were supplied at a weight ratio shown in Table 1 below into a Labo Plastomill manufactured by Toyo Seiki Co., Ltd., and were melt-kneaded at a set temperature of 170.
- Table 1 the above-mentioned layered silicate or layered silicate containing a cationic surfactant was used.
- 100 parts by weight of the above-mentioned acid-modified polyolefin resin was used. , Were added at the ratios shown in Table 1 below.
- the obtained composite composition was preheated at 170 ° C. for 5 minutes by a melt press, and pressed at 9.8 MPa for 1 minute to form a 1 mm thick sheet.
- the resulting sheet was cut into a 3 cm square, sealed in an autoclave, and the internal temperature of the autoclave was set to a temperature higher by 10 than the melting point or glass transition point of the thermoplastic resin.
- carbon dioxide, nitrogen or steam Gas was injected into the autoclave at a high pressure, and the internal pressure in the autoclave was maintained at 1.67 MPa for 30 minutes.
- the temperature inside the autoclave was set to a temperature 10 ° C lower than the melting point or the glass transition point of the thermoplastic resin, and the gas inside the autoclave was evacuated at once, and the internal pressure was returned to normal pressure.
- a foam sample was obtained.
- thermoplastic resin shown in Table 3 below and the layered silicate are supplied into a laboratory plastomill manufactured by Toyo Seiki Co., Ltd. in the weight ratio shown in Table 3 below, and are melt-kneaded at a set temperature of 17 did.
- the layered silicate montmorillonite containing azodicarbonamide between layers or swellable myi force was used.
- thermoplastic resin in Examples 19 to 23 and Comparative Examples 8 and 9, 100 parts by weight of the thermoplastic resin was added to Table 3 below. The indicated ratio of acid-modified polyolefin was added.
- the resulting composite composition was preheated with a melt press at 170 at 5 minutes, and pressed at 9.8 MPa for 1 minute to form a 1 mm thick sheet. Completed the thing.
- the obtained sheet was dipped in silicone oil heated at 200 ° C for 10 seconds to obtain a foam.
- thermoplastic resin and a layered silicate that does not contain a pyrolytic blowing agent between layers are supplied at a weight ratio shown in Table 3 below in a Labo Plastomill manufactured by Toyo Seiki Co., Ltd. The mixture was melt-kneaded with C.
- Comparative Example 8 5 parts by weight of the acid-modified polyolefin was added to 100 parts by weight of the thermoplastic resin to increase the affinity between the thermoplastic resin and the layered silicate.
- Comparative Examples 7, 8, 10 and 11 the composite compositions having the compositions shown in Table 2 below were pelletized and the pyrolysis products shown in Table 2 below were obtained.
- the mold foaming agent was melt-kneaded for 3 minutes using a Labo Plastomill.
- the obtained composite was preheated at 180 ° C. for 2 minutes by a melt press, and pressed at a pressure of 9.8 MPa for 1 minute to form a sheet having a thickness of 1 mm.
- the sheet was immersed in silicone oil heated to 20 for 10 seconds to obtain a foam.
- the following composition was used as a composite of a solvent-swelled layered silicate and a thermoplastic resin.
- 500 g of DS DM-modified montmorillonite (trade name: USB D) manufactured by Toyoshun Mining Co., Ltd. is put into 5 L of xylene (a reagent manufactured by Wako Pure Chemical Industries, Ltd.), and stirred at room temperature for 2 hours using a motor stirrer. A slurry was obtained.
- xylene a reagent manufactured by Wako Pure Chemical Industries, Ltd.
- the slurry was injected, and the liquid addition nozzle was also xylene from a ventro provided at the tip of the extruder.
- the composite extruded from the sheet die attached to the tip of the extruder was shaped into a 1 mm thick sheet and used as a sample for evaluation.
- the total adsorption rate of the blowing agent and the silane coupling agent adsorbed on the layered silicate was 45.3%.
- the expansion ratio of the foam was determined by the following equation (2).
- the specific gravity of the foam was calculated from the buoyancy generated when the foam was submerged in water. Expansion ratio-Specific gravity before foaming Specific gravity of foam ⁇ ⁇ ⁇ ⁇ (2)
- the foam was observed using a secondary electron reflection electron microscope (manufactured by JOEL, trade name: JSM-5800LV), and the average of 50 observed foam cells was defined as the foam cell diameter.
- Tables 2 and 4 show the evaluation results of the layer spacing of the layered silicate in the foam, the expansion ratio of the foam, and the cell diameter of the foam performed in the examples and comparative examples.
- a foam having a high expansion ratio and a uniform cell diameter was obtained by impregnating a composite containing a layered silicate with a chemical substance and expanding the volume in the composite.
- each foam cell diameter was 10 to 75 / m, and a very small foam cell diameter was obtained as a foam having an expansion ratio of 5 times or more.
- Comparative Example 12 Japanese Patent Application Laid-Open No. Hei 9-183939
- Comparative Example 13 Japanese Patent Application Laid-Open No. Hei 10-182892
- Example 10 6 OA ⁇ U: 14.2 53
- Example 11 60 AJiiJLh 16.
- Example 12 6 OA & i 6.5 49
- the following minerals were used as the layered silicate.
- the following materials were used as the layered silicate containing a cationic surfactant.
- thermoplastic resin The following compositions were used as the thermoplastic resin.
- compositions were used in order to increase the affinity between the thermoplastic resin and the layered silicate and to use it for comparison with the prior art.
- the following reagents were used as the pyrolytic foaming agent.
- thermoplastic resin In a Labo Plastomill manufactured by Toyo Seiki Co., Ltd., random polypropylene as a thermoplastic resin; SR256M and linear low-density polyethylene; 0238 CN added in a ratio of 8: 2; DSDM modified swelling force; MAE-100 was fed so as to be 5 parts by weight with respect to 100 parts by weight of the thermoplastic resin, and was melt-kneaded at a set temperature of 170. In order to increase the affinity between the thermoplastic resin and the layered silicate, 5 parts by weight of maleic anhydride-modified polypropylene; EUMEX 1001 was added to 100 parts of the thermoplastic resin.
- trimethylolpropane triatalylate is added in an amount of 3 parts by weight based on 100 parts by weight of the thermoplastic resin, and 12 parts by weight of azodicarbonamide; Uniform AZ-HM is added, followed by melt-kneading. did.
- the obtained composite composition was molded by heating with a hand press at 18 for 3 minutes to form a sheet having a thickness of 1 mm. This was irradiated with an electron beam at an acceleration voltage of 750 kV and an electron dose of 1 OMrad to perform crosslinking. The obtained electron beam irradiation raw material was foamed in a gear oven at 260 ° C. to obtain a sample for evaluation. Comparative Example 15
- talc which is generally used as an inorganic filler, is fed so that talc is 5 parts by weight based on 100 parts by weight of the thermoplastic resin, and maleic anhydride-modified polypropylene is used. Was not blended, and otherwise the same as in Example 1 to obtain a sample for evaluation.
- a foam was made from the same raw materials as in Example 4 except that tin was used.
- pentane was injected into the autoclave, and then the internal pressure in the autoclave was kept at 5.88 MPa for 30 minutes. Further, the temperature in the autoclave was set to a temperature one lower than the melting point of the thermoplastic resin (EA 9) used, and in this state, the gas in the autoclave was evacuated at once, and the inside of the autoclave was returned to normal pressure. .
- EA 9 thermoplastic resin
- thermoplastic resin composition was transferred from the pressure hopper 76 of the molding apparatus shown in FIG.
- the diameter of the screw 72 was 40 mm and the length of the screw 72 was 30 mm.
- pressurizing pump 73 is used for gas supply port 75 provided in liquid material transporting section 74 of extruder 71.
- thermoplastic resin composition was about 9% by weight.
- thermoplastic resin composition supplied to the extruder 71 is sufficiently melted therein under the conditions of an extrusion rate of 2 kg / hour, a screw rotation speed of 10 rpm, and a cylinder-set temperature of 20. Kneaded.
- the thermoplastic resin composition was passed through the tip of the mold, and the mold 7 7 The resin was extruded into a rod shape to produce a foam.
- the obtained foam was evaluated in the same manner as in Example 1. As a result, the interlayer distance of the layered silicate was 60 A or more, the expansion ratio was 13.2 times, and the expansion cell diameter was 95 / zm.
- thermoplastic resin composition supplied into the hopper 15.
- a, 6 (the case of C0 2, supercritical, when the N 2 pressure) atmosphere impregnated with, and supplied to the cylinder 14 which was at a temperature of 250, the melt-kneading and metering at a rotation number 50 r pm the disk Reuse 1 3
- the material is injected into a 250 mm diameter, 3 mm wide disk-shaped cavity, and is held for 20 seconds.Then, as shown in Fig. 6, the cavity is exposed for 1 second. After expanding 23 to 45 mm in width, cool it for 30 seconds, A foam was obtained.
- Example 2 The foam obtained in 8335 was evaluated in the same manner as in Example 1.
- the thermal conductivity of the foam obtained in Example 28 35 was evaluated using the following capacities. The results are shown in Table 6 below. In Table 6,
- the foams obtained in Examples 28 to 35 all had an average inter-layer distance exceeding 6 OA, which is the detection limit of the X-ray diffraction measurement apparatus, and a foam cell diameter of 12 to 7 2 / zm, which is uniform and fine, and has a thermal conductivity of 0.054 to 0.071 W / (m-K) and excellent heat insulation performance, while the foam obtained in Comparative Example 14
- the body had a narrow average interlayer distance of 28 A, a very large cell diameter of 300 ⁇ , and a high thermal conductivity of 0.098 WZ (m ⁇ ⁇ ).
- the thermoplastic resin foam according to the present invention contains 100 parts by weight of the thermoplastic resin and 0.1 to 50 parts by weight of the layered silicate, and contains the layered silicate detected by X-ray diffraction measurement. Since the average interlayer distance in the salt is 6 OA or more, the dispersibility of the flaky silicate crystal of the layered silicate in the foam is enhanced. Therefore, the lamellar silicate flake crystals are uniformly dispersed, and the physical properties, such as heat resistance, flame retardancy, and dimensional stability, of the addition of the lamellar silicate are enhanced.
- the foam is a foam in which uniformly fine foamed cells are uniformly dispersed.
- a foam having less variation in physical properties such as elasticity can be provided.
- a polyolefin-based resin can be used as the thermoplastic resin.
- a polyolefin-based resin foam having improved physical properties due to uniform dispersion of the layered silicate can be provided.
- the layered silicate at least one of a swellable smectite clay mineral and a swellable mica is preferably used, in which case the dispersibility of these minerals is enhanced and acts as a nucleating agent during foaming. Therefore, the foam diameter can be further reduced. In addition, the mechanical strength can be increased.
- thermoplastic resin foam In the method for producing a thermoplastic resin foam according to the present invention, there is provided a composite layered silicate containing 100 parts by weight of a thermoplastic resin and 0.1 to 50 parts by weight of a layered silicate.
- the foam is formed by impregnation of the substance and volumetric expansion of the chemical within the composite.
- the flaky crystals of the layered silicate act as partition walls when the chemical substance expands in volume, it is possible to suppress excessive escape of the chemical substance, that is, gas, and partially uneven expansion.
- the silicate flaky crystals can be uniformly dispersed, and the fine foam cells can be uniformly dispersed. Therefore, a thermoplastic resin foam excellent in physical properties such as strength and heat resistance can be easily provided.
- no solvent is required for the production, a complicated process for removing the residual solvent is not required.
- thermoplastic resin composition containing 100 parts by weight of a thermoplastic resin and 0.1 to 50 parts by weight of a layered silicate is mixed with a gaseous chemical substance at normal temperature and pressure in an injection molding machine having a cavity.
- the flaky silicate crystal of the layered silicate acts as a partition wall.
- the layered silicate can be more effectively dispersed.
- an increase in heat-resistant deformation temperature due to restraint of molecular chains can be expected, and a diffusion effect of combustion gas and a nucleating agent effect by inorganic crystals can be expected. It is also possible to greatly improve flame retardancy, dimensional stability and various physical properties.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Structural Engineering (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Inorganic Chemistry (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE60024849T DE60024849T2 (de) | 1999-08-09 | 2000-08-07 | Thermoplastischer hartschaum und verfahren zu dessen herstellung |
AT00951894T ATE312871T1 (de) | 1999-08-09 | 2000-08-07 | Thermoplastischer hartschaum und verfahren zu dessen herstellung |
EP00951894A EP1219672B1 (en) | 1999-08-09 | 2000-08-07 | Thermoplastic resin foam and process for producing the same |
US10/048,457 US6906119B1 (en) | 1999-08-09 | 2000-08-07 | Thermoplastic foam and method for production thereof |
US10/918,552 US7173068B2 (en) | 1999-08-09 | 2004-08-16 | Thermoplastic foam and method for production thereof |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22541299 | 1999-08-09 | ||
JP11/225412 | 1999-08-09 | ||
JP30588199 | 1999-10-27 | ||
JP11/305881 | 1999-10-27 | ||
JP2000026663 | 2000-02-03 | ||
JP2000/26663 | 2000-02-03 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10048457 A-371-Of-International | 2000-08-07 | ||
US10/918,552 Division US7173068B2 (en) | 1999-08-09 | 2004-08-16 | Thermoplastic foam and method for production thereof |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001010941A1 true WO2001010941A1 (fr) | 2001-02-15 |
Family
ID=27331046
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2000/005281 WO2001010941A1 (fr) | 1999-08-09 | 2000-08-07 | Mousse de resine thermoplastique et procede de fabrication |
Country Status (5)
Country | Link |
---|---|
US (2) | US6906119B1 (ja) |
EP (1) | EP1219672B1 (ja) |
AT (1) | ATE312871T1 (ja) |
DE (1) | DE60024849T2 (ja) |
WO (1) | WO2001010941A1 (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1408081A4 (en) * | 2001-06-22 | 2005-01-05 | Idemitsu Petrochemical Co | COMPOSITE RESIN COMPOSITION, RESIN FOAM, AND PROCESS FOR PRODUCING THE SAME |
JP4155749B2 (ja) * | 2002-03-20 | 2008-09-24 | 日本碍子株式会社 | ハニカム構造体の熱伝導率の測定方法 |
DE102005015983A1 (de) * | 2005-04-07 | 2006-10-12 | Basf Ag | Nanokomposit-Schaumstoff |
DE102005053697A1 (de) * | 2005-11-10 | 2007-05-24 | Wacker Chemie Ag | Schäumbare Zusammensetzung zur Herstellung geschäumter Kunststoffe |
US7384463B2 (en) * | 2006-10-30 | 2008-06-10 | Xerox Corporation | Phase change ink containing amphiphilic molecule |
WO2008112815A2 (en) | 2007-03-12 | 2008-09-18 | University Of Washington | Methods for altering the impact strength of noncellular thermoplastic materials |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58136630A (ja) * | 1982-02-09 | 1983-08-13 | Hitachi Chem Co Ltd | ポリオレフインフオ−ムの製造方法 |
JPS6295330A (ja) * | 1985-10-21 | 1987-05-01 | Kuraray Co Ltd | 熱可塑性樹脂発泡体 |
JPH10182141A (ja) * | 1996-12-24 | 1998-07-07 | Sumitomo Bakelite Co Ltd | 熱膨張性材料及びそれを含む難燃性樹脂組成物 |
JP2000026646A (ja) * | 1998-07-13 | 2000-01-25 | Kanegafuchi Chem Ind Co Ltd | ポリプロピレン系樹脂発泡体の製造方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4739007A (en) * | 1985-09-30 | 1988-04-19 | Kabushiki Kaisha Toyota Chou Kenkyusho | Composite material and process for manufacturing same |
US5164440A (en) * | 1988-07-20 | 1992-11-17 | Ube Industries, Ltd. | High rigidity and impact resistance resin composition |
WO1993004118A1 (en) | 1991-08-12 | 1993-03-04 | Allied-Signal Inc. | Melt process formation of polymer nanocomposite of exfoliated layered material |
JPH08143697A (ja) * | 1994-11-21 | 1996-06-04 | Nissan Motor Co Ltd | ポリプロピレン発泡体組成物 |
WO1997031057A1 (en) * | 1996-02-23 | 1997-08-28 | The Dow Chemical Company | Polymer composite and a method for its preparation |
-
2000
- 2000-08-07 US US10/048,457 patent/US6906119B1/en not_active Expired - Fee Related
- 2000-08-07 AT AT00951894T patent/ATE312871T1/de not_active IP Right Cessation
- 2000-08-07 WO PCT/JP2000/005281 patent/WO2001010941A1/ja active IP Right Grant
- 2000-08-07 DE DE60024849T patent/DE60024849T2/de not_active Expired - Lifetime
- 2000-08-07 EP EP00951894A patent/EP1219672B1/en not_active Expired - Lifetime
-
2004
- 2004-08-16 US US10/918,552 patent/US7173068B2/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58136630A (ja) * | 1982-02-09 | 1983-08-13 | Hitachi Chem Co Ltd | ポリオレフインフオ−ムの製造方法 |
JPS6295330A (ja) * | 1985-10-21 | 1987-05-01 | Kuraray Co Ltd | 熱可塑性樹脂発泡体 |
JPH10182141A (ja) * | 1996-12-24 | 1998-07-07 | Sumitomo Bakelite Co Ltd | 熱膨張性材料及びそれを含む難燃性樹脂組成物 |
JP2000026646A (ja) * | 1998-07-13 | 2000-01-25 | Kanegafuchi Chem Ind Co Ltd | ポリプロピレン系樹脂発泡体の製造方法 |
Also Published As
Publication number | Publication date |
---|---|
DE60024849D1 (de) | 2006-01-19 |
US7173068B2 (en) | 2007-02-06 |
ATE312871T1 (de) | 2005-12-15 |
EP1219672A1 (en) | 2002-07-03 |
US20050020704A1 (en) | 2005-01-27 |
DE60024849T2 (de) | 2006-08-24 |
US6906119B1 (en) | 2005-06-14 |
EP1219672A4 (en) | 2002-10-30 |
EP1219672B1 (en) | 2005-12-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
AU712100B2 (en) | Dispersions of delaminated particles in polymer foams | |
Park et al. | Preparation and properties of biodegradable thermoplastic starch/clay hybrids | |
Lee et al. | Effects of clay dispersion on the foam morphology of LDPE/clay nanocomposites | |
Lee et al. | Exfoliation and dispersion enhancement in polypropylene nanocomposites by in‐situ melt phase ultrasonication | |
JP7050136B2 (ja) | 低減した熱伝導度を有する発泡性ビニル芳香族ポリマー顆粒状物の生産のためのプロセス | |
JP2008201825A (ja) | 有機処理フィラーの製造方法 | |
Chen et al. | Novel thermoplastic starch–clay nanocomposite foams | |
JP2002356574A (ja) | 発泡性熱可塑性樹脂組成物、熱可塑性樹脂発泡体及び積層複合体 | |
JP5170865B2 (ja) | 層間化合物フィラーを含有する発泡性ポリオレフィン系樹脂組成物およびポリオレフィン系難燃発泡体 | |
JP4677684B2 (ja) | 高分子−フィラー複合材料の製造方法 | |
WO2001010941A1 (fr) | Mousse de resine thermoplastique et procede de fabrication | |
JP5128143B2 (ja) | ポリオレフィン系難燃発泡組成物およびオレフィン系難燃発泡体 | |
JP3769454B2 (ja) | 熱可塑性樹脂発泡体の製造方法 | |
Lee | Foaming of wood flour/polyolefin/layered silicate composites | |
WO2008140843A1 (en) | High temperature resistant, structural polymer foam | |
JP2004018595A (ja) | 熱可塑性樹脂架橋発泡体の製造方法 | |
Lee et al. | Extrusion foaming of nano-clay-filled wood fiber composites for automotive applications | |
JP2001123000A (ja) | ポリオレフィン系樹脂発泡体 | |
KR20120128524A (ko) | 나노충진제의 완전 박리화 공정과 효율적인 분산 및 이를 함유하는 고분자 나노복합체 제조방법 | |
US6835766B1 (en) | Nanocomposites | |
KR20120128736A (ko) | 친수성을 띄는 고분자 나노복합체 제조방법 및 그 복합체 | |
Kim et al. | Flammability in WPC Composites | |
JP2002146079A (ja) | 熱可塑性樹脂発泡体及びその製造方法 | |
WO2004007596A1 (ja) | ポリスチレン樹脂発泡体及びその製造方法 | |
Frache et al. | Preparation of nanocomposites based on PP and PA6 by direct injection molding |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2000951894 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 10048457 Country of ref document: US |
|
WWP | Wipo information: published in national office |
Ref document number: 2000951894 Country of ref document: EP |
|
WWG | Wipo information: grant in national office |
Ref document number: 2000951894 Country of ref document: EP |