WO2005049706A1 - 発泡成形用樹脂組成物、発泡体、および発泡体の製造方法 - Google Patents
発泡成形用樹脂組成物、発泡体、および発泡体の製造方法 Download PDFInfo
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- WO2005049706A1 WO2005049706A1 PCT/JP2004/016468 JP2004016468W WO2005049706A1 WO 2005049706 A1 WO2005049706 A1 WO 2005049706A1 JP 2004016468 W JP2004016468 W JP 2004016468W WO 2005049706 A1 WO2005049706 A1 WO 2005049706A1
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- 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
- C08J9/06—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 by a chemical blowing agent
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- 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
- C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
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- 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
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/16—Ethene-propene or ethene-propene-diene copolymers
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- 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
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
Definitions
- the present invention relates to a resin composition for foam molding, a foam, and a method for producing a foam. More specifically, the present invention provides a foam molded article that can be used for automotive interior parts and the like, has a high degree of freedom in expansion ratio from low foaming to high foaming, is flexible, has excellent cushioning properties, heat insulating properties, and recycling.
- the present invention relates to an obtainable olefin resin composition, a foam obtained by using the resin composition, and a method for producing a foam. Background art
- in-mold foam molding has a high expansion ratio, has excellent moldability in the mold, and has a flexible feel and cushioning properties. Although it is used as a chip form in terms of material recycling, it has many issues to be recycled as a foaming material again, and it is a material with a low recycling potential.
- Thermoplastic elastomer based elastomers are widely used as materials having good recyclability, and efforts have been made on foams thereof (Japanese Patent Application Laid-Open No. 54-112 967).
- This prior art includes "(a) 90 to 50 parts by weight of a peroxide-crosslinked olefin copolymer rubber, and (b) 10 to 50 parts by weight of a peroxide-decomposed olefin resin (where (a ) + (b) is 100 parts by weight ⁇
- the mixture is dynamically heat-treated in the presence of an organic peroxide to obtain a foamed composition
- a foamed composition comprising a lightly crosslinked rubber composition (A) and a decomposable foaming agent (B).
- a method for producing a thermoplastic elastomer foam characterized in that the composition is heated and melted and then foamed to obtain a molded article. " Is disclosed.
- the expansion ratio is up to 2.9 times by extrusion foaming
- the expansion ratio is increased by injection foaming. The maximum is 2.5 times, and both have low foaming ratios, and sufficient feel and cushioning have not been obtained.
- JP-A-54-112967 and JP-A-9-1143297 disclose that there are various problems with foaming, which contribute to improving the rubber elasticity of the resin itself. This has been clarified by the inventors' research.
- the techniques disclosed in JP-A-54-112967 and JP-A-9-1143297 disclose that (i) the base material needs to be dispersed, dissolved and dissolved in the base material before foam molding. As the crosslink density (gel fraction) of the material increases, the base material Dispersing, dissolving, and dissolving the foaming agent in the mixture, and (ii) the resulting foaming agent cannot effectively contribute to foaming. (Iii) As a result, the foaming ratio is increased.
- a foam-molded product having excellent recyclability and excellent moldability in the mold, a high foaming ratio of the cushion layer, and a flexible cushioning property with excellent texture can be obtained. It is not yet provided.
- the present invention has been made in view of the above circumstances, and has a problem that it can be used for interior parts of automobiles, has a high expansion ratio, is flexible, has excellent cushioning properties, and has excellent heat insulation properties. It is an object of the present invention to provide a resin composition capable of obtaining a foamed molded article, a foam obtained using the resin composition, and a method for producing the foam. Disclosure of the invention
- the present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, by using a specific composition of an olefin-based thermoplastic elastomer composition as a resin composition for foam molding, a desired foam is obtained. I came to confirm that I could get.
- the resin composition specified by the present inventors is an olefin-based thermoplastic elastomer capable of achieving a high expansion ratio and capable of obtaining a foam having excellent cushioning properties and excellent heat insulation properties.
- This olefin thermoplastic elastomer comprises an organic peroxide crosslinked olefin copolymer rubber (A) and an organic peroxide compound; ⁇ an early crystalline olefin resin (B).
- the organic peroxide crosslinked olefin copolymer rubber (A) exists as a continuous phase
- the organic peroxide decomposable crystalline olefin resin (B) exists as a discontinuous phase. It is characterized by doing.
- the micro-aggregated structure referred to in the present invention means that a resin composition for foam molding comprising a rubber component, a resin component, and a force is treated with a staining agent such as osmium-trioxide-ruthenium-ruthenium to obtain a transmission-type electron-emitting device.
- a staining agent such as osmium-trioxide-ruthenium-ruthenium to obtain a transmission-type electron-emitting device.
- TEM transmission-type electron-emitting device
- the determination of the rubber phase and the crystal phase in such a mixed structure can be made as follows.
- the TEM observation of only the organic peroxide crosslinked type olefin copolymer rubber (A) treated with a dye alone shows that the entire surface is dark black, while the organic peroxide decomposable crystalline Observation of the same resin alone (B) alone after the same treatment and observation revealed that the entire surface had a distinctive color. Therefore, it can be determined that the rubber component phase was dark black and the crystalline component phase was a distinctive color.
- the resin composition of the present invention has a feature that “the organic peroxide crosslinked olefin copolymer rubber (A), which is a constituent component of the resin composition, exists as a continuous phase,
- the constituent organic peroxide-decomposable crystalline olefin resin (B) is present as a discontinuous phase.
- This micro-aggregation structure is not fixed in a narrow range, but has a relatively variable range. In other words, the area occupied by the continuous phase and the discontinuous phase is not fixed, but has a certain fluctuation range, and the fluctuation range makes it possible to arbitrarily set a wide magnification range from a low expansion ratio to a high expansion ratio. .
- a foam having a desired expansion ratio can be obtained by controlling such a micro-aggregated structure.
- control factors as follows. That is, the “micro-aggregated structure composed of a continuous phase and a discontinuous phase” of the present invention is based on the composition of the rubber component and the crystalline resin component. , Molecular weight, and blending ratio, and conditions such as the degree of shearing and temperature during mixing, the degree of branching (gel fraction) of the rubbery olefin-based soft resin as described later, and the difference in melt viscosity of each component. And the interfacial tension can be controlled by blending a compatibilizer.
- the fact that there are various control factors means that the expansion ratio can be finely controlled by variously combining the control factors.
- the feature of the present invention is that a foamed body having an arbitrary expansion ratio can be provided.
- the micro-aggregated structure of the rubbery soft resin (C) is based on the fact that the organic peroxide cross-linked type copolymer rubber (A) exists as a continuous phase,
- the oxide-decomposable crystalline resin (B) has a systematic structure in which it is present as a discontinuous phase, it has excellent foaming properties and can have a foaming ratio of 3 times or more.
- the micro-aggregation structure of the rubbery soft resin (C) is based on the fact that the organic peroxide decomposable crystalline resin (B) exists as a continuous phase, and the organic peroxide cross-linked soft resin (B) is present.
- coalesced rubber (B) has a systematic structure in which it is present as a discontinuous phase, the foamability is poor, and it is difficult to stably obtain an expansion ratio of 3 times or more. ), The flexibility and cushioning were further deteriorated.
- the organic peroxide used in the present invention crosslinked Orefuin based copolymer rubber (A) is, alpha-Orefin content of carbon atoms 2-2 0 5 0 mole 0/0 or more amorphous random elastic A copolymer or an elastic copolymer having a degree of crystallinity of 50% or less, which is an amorphous ⁇ -olefin comprising two or more types of ⁇ -olefins, or a copolymer of two or more types of ⁇ -olefins and a non-conjugated gen copolymer It is.
- copolymer copolymer rubber examples include the following rubbers.
- ex-olefins include, specifically, ethylene, propylene, 1-butene, 1-pentene, 4-methyl-111-pentene, 1-1hexene, 1-otene, 1-nonene, 1-decene, 1 1-decene, 1-dedecene, 1-tridecene, 1-tetradecene, 1-pentadecene, 1-hexadecene, 1-heptadecene, 1-octadecene, 1-nonadecene, 1-eicosene, 3-methyl-1-butene, 3-methyl-1 1-pentene, 3-ethyl-1 1-pentene, 4-methyl-1-pentene, 4-methyl-1-hexene, 4,4-dimethyl-1-pentene, 4-ethyl-1-hexene, 3-ethyl-1 Examples include 1-hexene, 9-methyl-1-decene, 11-methyl-1dodecene, 12-e
- non-conjugated diene examples include dicyclopentadiene, 1,4-hexadiene, cyclooctadiene, methylene norbornene ', and ethylidene norbornene.
- the Mooney viscosity [ML 1.4 (100.C)] of these copolymer rubbers is preferably 10 to 250, particularly preferably 40 to 150.
- the ethylene'-olefin 'non-conjugated gen copolymer rubber of the above (b) preferably has an iodine value of 25 or less.
- the organic peroxide crosslinked olefin copolymer is used.
- the amounts of the polymer rubber (A) and the organic peroxide crosslinked olefin copolymer rubber (A) and the organic peroxide degradable crystalline olefin resin (B ) With respect to 100 parts by weight in total, preferably from 30 parts by weight to less than 100 parts by weight, more preferably from 60 parts by weight to less than 100 parts by weight, particularly preferably from 65 to 95 parts by weight. Parts by weight.
- the mixing ratio of the organic peroxide cross-linked olefin copolymer rubber (A) and the organic peroxide ⁇ ⁇ -type crystalline olefin resin (B) deviates from a preferable ratio to an unfavorable ratio, the mixture is kneaded.
- the micro-aggregated structure of the rubber-like soft resin (C) obtained as a result the components of the continuous phase and the discontinuous phase grow in reverse, and the expansion ratio tends to decrease.
- Examples of the organic peracid decomposable crystalline resin ( ⁇ ) used in the present invention include homo- or copolymers of a-olefin having 2 to 20 carbon atoms.
- organic peroxide-decomposable crystalline resin ( ⁇ ) include the following (co) polymers.
- the ⁇ -olefin include the same ⁇ -olefins as the specific examples of the ⁇ -olefin constituting the above-described ⁇ -olefin copolymer rubber.
- the organic The compounding amount of the peroxide-decomposable crystalline olefin resin (B) is the same as that of the organic peroxide cross-linked olefin copolymer rubber (A) and the organic peroxide-degradable crystalline olefin resin (B). Is preferably less than 70 parts by weight, more preferably less than 40 parts by weight, particularly preferably 5 to 35 parts by weight, based on 100 parts by weight of the total amount of
- a softening material of the mixture a paraffinic, naphthenic, or aromatic softener or an ester plasticizer, and the like are used. It may be added in an amount of 50% by weight or less with respect to the total weight of 100% by weight with the oxide crosslinked type copolymer rubber (A).
- the above-mentioned organic peroxide-crosslinked olefin copolymer rubber (A) is composed of an organic peroxide-crosslinked olefin copolymer rubber (A) and an organic peroxide-decomposed crystalline olefin resin (A).
- A organic peroxide-crosslinked olefin copolymer rubber
- A organic peroxide-decomposed crystalline olefin resin
- the method for measuring the gel fraction is as follows. A test compound is immersed in this solvent at room temperature for 48 hours using a cycling hexane as a solvent, and a component insoluble in the solvent is converted into a gel component. I am dealing with it. Cyclohexane can substantially dissolve non-cross-linked EPDM rubber, but non-cross-linked crystalline polypropylene can hardly dissolve. When evaluating the crosslinked part of EP DM rubber as a gel component, or when using non-crosslinked crystalline polyp When pyrene is evaluated as a pseudo-crosslinked gel component, the conventional gel fraction measurement method and measured value using cyclohexane as a solvent should be broadly crosslinked, including pseudo-kana, and be used as a base material.
- the gel fraction measured using cyclohexane as a solvent has been found to be an improper measurement method having no meaning in the present invention.
- the following gel fraction is preferable as an index that can be evaluated for “chemical branching specified as contributing to enhance foaming properties”. This gel fraction is measured as follows.
- the proportion of branches present in the olefin thermoplastic elastomer is preferred.
- the gel fraction in boiling xylene (138 ° C.) for 3 hours is preferably less than 10 wt%, and more preferably less than 5 wt%.
- the gel fraction When the gel fraction is less than 10 wt%, it is particularly preferable because the fluidity is excellent, the expansion ratio is high, and foam molding in a mold or a die is easy.
- the foaming agent needs to be dispersed, dissolved, and dissolved in the base material before foaming, when the gel fraction becomes 1 O wt% or more, that is, the crosslink density of the base material (gel Ratio), it becomes difficult to uniformly disperse, dissolve, and dissolve the blowing agent in the base material. As a result, the expansion ratio does not increase and the fluidity is poor.
- the gel fraction is 1 O wt% or more
- the fluid viscosity is high, so that during the dispersion kneading with the foaming agent prior to in-mold foaming, the molecules are severely cut due to shear heat generation, for example, the olefin-based heat.
- the component fraction of the organic peroxide cross-linked olefin copolymer rubber (A) in the plastic elastomer (C) is 65 to 95 parts by weight (organic peroxide; ⁇ early crystalline crystalline resin ( (B) is 35 to 5 parts by weight), the micro-aggregation structure is such that the organic peroxide-decomposable crystalline olefin resin (B) constitutes a continuous phase, and the organic peroxide cross-linked olefin resin
- the combined rubber (A) forms a discontinuous phase, that is, a phase structure that is opposite to the preferred continuous Z discontinuous phase structure, and the expansion ratio is significantly reduced.
- the method of providing a branch having a gel fraction of less than 10 wt% is to knead the organic peroxide crosslinked type olefin copolymer rubber and the organic peroxide decomposition type crystalline olefin resin at a high temperature.
- the reaction can be carried out, and as a crosslinking agent, a crosslinking agent usually used for vulcanizing rubber can be used.
- a crosslinking agent usually used for vulcanizing rubber can be used.
- known methods such as a method using a peroxide, electron beam irradiation, sulfur vulcanization, and silane crosslinking can be used.
- phenolic resin a bromide of an alkylphenolic resin, or a curing agent such as a mixed cross-linking system containing an alkylphenol resin and a hachigen donor such as tin chloride tin and black-mouthed prene can also be used.
- peroxide examples include dicumyl peroxide, di-tert-butylbenzyloxide, 2,5-dimethyl-2,5-di (tert-butylinolexy) hexane, 2,5-Dimethyl-2,5-di (tert-butylperoxy) hexine-1,3,3-bis (tert-butylperoxy-isopropyl) benzene, 1,1-bis (tert-butylperoxy) 13,3,3-trimethylinoresi 5Chlorohexane, n-butyl-1,4,4-bis (tert- (Petinolenoreoxy) No ⁇ Releate, Benzoinoleperoxide, p-Brozen benzoynoroleoxide, 2,4-dichlorobenzoinoleperoxide, tert-butyl 7-leoxybenzoate, tert —Butyl perbenzoate,
- the peroxide is preferably added in an amount of usually about 0.01 to 2.5 parts by weight based on 100 parts by weight of the whole unfoamed foamed resin base material. It is adjusted in consideration of the balance such as bubble diameter, gel fraction, and density.
- sulfuric acid ⁇ -quinonedioxime, p, p, 1-benzoylquinonedioxime, N_methyl-N-4-dinitrosoaniline
- Peroxy crosslinking aids such as nitrosobenzene, dipheninoleguanidine, N, N, 1 m-phenylenedimaleimide, or divininolebenzene, triaryl cyanate, ethylene glycol'dimethacrylate, trimethylolpropane trimethacrylate, acrylic methacrylate And polyfunctional butyl monomers such as butyl butyrate and pinyl stearate.
- the flowability and foamability of the foamed base resin can be adjusted as appropriate depending on the amount of these auxiliaries.
- the resin when the resin is branched by ionizing radiation such as electron beam, neutron beam, ⁇ -ray,] 3-ray, ⁇ -ray, X-ray, ultraviolet ray, etc., it is not necessary to add a crosslinking agent.
- ionizing radiation such as electron beam, neutron beam, ⁇ -ray,] 3-ray, ⁇ -ray, X-ray, ultraviolet ray, etc.
- polyfunctional methacrylate monomers such as divinylbenzene, triallyl cyanurate, ethylene glycol dimethacrylate, trimethypropane trimethacrylate, and acrylic methacrylate
- bierptilate Multifunctional butyl 'monomers such as butyl stearate
- thermoplastic resins and thermoplastic elastomer compositions can be added as long as the objects of the present invention are not impaired.
- kneading is performed using a known kneading machine such as a V-type Brabender, a tumbler mixer, a Ribbon brabender, and a Henschel mixer, and the kneaded product is mixed with an open type mixer or non-mixer.
- a kneading and dispersing method using a known kneading machine such as an open pan bread mixer, an extruder, a kneader, or a continuous mixer can be preferably used.
- the composition may undergo a branching reaction, or may be mixed so as not to cause a branching reaction, and the resulting kneaded material may be statically reheated by an oven or a hot press device.
- a branching reaction may be performed.
- the unfoamed olefin-based thermoplastic elastomer for foam molding adjusted by these methods is preferably used in the form of a pellet using a known pelletizer. (Foamable resin and foam)
- an unfoamed foaming master can also be prepared by kneading a pyrolyzable foaming agent into the olefin-based thermoplastic elastomer composition for foam molding at a temperature not higher than the decomposition temperature of the foaming agent.
- kneading the olefin thermoplastic elastomer for foam molding and the blowing agent using a known kneading machine such as a V-brabender, a tumbler mixer, a ribbon brabender, or a Henschel's mixer.
- kneading is adjusted by using an extruder, mixing roll, kneader, pan parry mixer, etc. at a temperature at which the pyrolytic foaming agent does not decompose.
- the foaming agent is generally used in a proportion of 1 to 25 parts by weight based on 100 parts by weight of the unfoamed foamed base resin.
- the masterbatch of the unfoamed olefin-based thermoplastic elastomer for foam molding adjusted by these methods be used in the form of pellets using a known pelletizer.
- the foaming agent compounded in the above-mentioned olefin foam resin base material includes a pyrolysis-type foaming agent which generates gas by heating, and specific examples of such a foaming agent include azodicarbonamide. (AD CA), getyl azo carboxylate, barium azodicarbonate, 4,4-oxybis (benzenesulfonyl hydrazide), 3,3-disulfone hydraside phenyl sulfonic acid, ⁇ , ⁇ , dinitrosopentame
- Organic blowing agents such as tetramine, toluenesulfonyl hydrazide, and trihydrazinotriazine; and inorganic blowing agents such as sodium hydrogen carbonate, ammonium hydrogen carbonate, and ammonium carbonate.
- azodicarbonamide ADCA
- AD azodicarbonamide
- ⁇ 1,2-dinitrosopentamethetramine
- trihydrazinotriazine are preferable as the organic blowing agent
- sodium hydrogencarbonate is preferable as the inorganic blowing agent.
- sodium hydrogencarbonate may be used as a mixture of monosodium citrate and glycerin fatty acid ester.
- blowing agents may be used alone or in combination.
- a so-called ⁇ auxiliary can be used in combination.
- Additives such as a foaming aid, a wetting agent, a weather stabilizer, a heat stabilizer, an antioxidant, and a coloring agent, and a filler are blended at any stage of the kneading.
- foamable master patch consisting of a foaming olefin-based thermoplastic elastomer as a resin raw material
- an amorphous olefin rubber or a crystalline olefin resin may be mixed and used.
- olefin examples include ethylene, propylene, 1-butene, 1-pentene, 4-methynole_1-pentene, 1-hexene, 1-octene, 1-nonene, 1-decene, 1- undecene, 1-dodecene, and 1-tridecene.
- 1-tetradecene 1-pentadecene, 1-hexadecene, 1-heptadecene, 1-octadecene, 1-nonadecene, 1_eicosene, 3-methyl-1-1-pentene, 3-methyl-1-pentene, 3-ethyl-1 1-pentene, 4-methyl-1 1-pentene, 4-methylinone 1-hexene, 4,4-dimethynole-1 1-pentene, 4-ethynol-1 1-hexene, 3-ethyl-1 1-hexene, 9-methyl-1 —Decene, 11-methyl-11-decene, 12-ethyl-1-tetradecene, and combinations thereof.
- the crystalline Orefuin resin propylene and 1 0 random copolymer of mole 0/0 following other non Orefin, propylene and 30 mole 0 / o following other alpha - proc copolymerization with Orefuin combined, 1-heptene homopolymer, random copolymer of 1-butene alone polymer 1 0 mole 0/0 following other Fei one Orefin, 4-methyl-1-pentene homopolymer, and 4 Mechiru one 1 one-pentene Less than 20 mol% There is a random copolymer with refin.
- the resin can be foamed with a volatile solvent, water, or the like, instead of foaming with the pyrolytic foaming agent.
- the gas itself can be dispersed or impregnated in the foamed resin base material.
- carbon dioxide gas or nitrogen gas can be used as the foaming agent.
- the injection and kneading conditions of these foaming agents before injection or extrusion may be in a supercritical state or a non-supercritical state, or in a shifted state.
- the foamable olefin thermoplastic elastomer is foam-molded through a nozzle in a mold or through a die.
- the foam resin composition of the present invention is a mixture of an organic peroxide cross-linked olefin-based copolymer rubber (A) and an organic peroxide-decomposable crystalline olefin resin (B).
- the organic peroxide cross-linked olefin copolymer rubber (A) exists as a continuous phase, and the organic peroxide decomposable crystal is contained in the continuous phase. It is composed of a branched rubber-like soft resin (C) in which the crystalline resin (B) exists as a discontinuous phase, and exhibits a high level of expansion and expansion ratio by having the micro-aggregated structure.
- FIG. 1 is a view showing a transmission electron micrograph showing a micro-mouth aggregation structure of the molding resin composition prepared in Example 1
- FIG. 2 is a molding resin composition prepared in Example 2.
- FIG. 3 is a transmission electron micrograph showing a micro-aggregation structure of the product
- FIG. 3 is a transmission electron micrograph showing a micro-aggregation structure of the molding resin composition prepared in Comparative Example 1.
- FIG. 4 is a view showing a transmission electron micrograph showing a micro-mouth aggregate structure of the resin composition for molding prepared in Comparative Example 2.
- the injection molding machine used for molding was a type with a clamping force of 450 tons, a plasticizing capacity of 197 kg / h, a screw diameter of 58 mm, a maximum injection pressure of 216 MPa, and a maximum injection rate of 528 cm 3 / s.
- the core pack molding method was applied.
- the mold used for molding the foam of the present invention was an A4 size office receiving box having a wall thickness of 4 mm.
- Ethylene 'propylene' non-conjugated diene copolymer rubber [EPT; ethylene content 38 mol%, iodine value 12, MFR (ASTM 1238, 190 ° C, 2.16 kg load) 1.1 g / 10 minutes] 65 parts by weight and 35 parts by weight of polypropylene [PP; propylene content 100%, MFR (ASTM 1238, 190 ° C, 2.16 kg load) 5.
- a master patch (foamable olefin-based thermoplastic elastomer) was prepared by kneading 4 parts by weight of a mixture of sodium bicarbonate and citric acid with 100 parts by weight of the obtained foamable olefin-based thermoplastic elastomer. did. After melting and dispersing the master patch again in a cylinder at 200 ° C, a foamable olefin thermoplastic elastomer was injected into a closed mold formed by upper and lower molds (injection conditions). The injection speed: 200mm / s, mold temperature: 30 ° C).
- the foamed molded product obtained from the olefin-based thermoplastic elastomer obtained was taken out, and the expansion ratio of the molded product was 4.1 times (expansion ratio: specific gravity after foaming Z specific gravity before foaming), the molded shape was good, and the feel was rubber.
- the condition was good (Ascar C hardness: 22).
- Ethylene / propylene / non-conjugated diene copolymer rubber [EPT; ethylene content: 38 mol. /. , Iodine value 12, MFR (ASTM 1238, 190 ° C, 2.16 kg load) 1. l gZl O content] 75 parts by weight and polypropylene [PP; propylene content 100%, MFR (ASTM 1238, 190 ° C , 2.16 kg load) 5. OZlO content]] 25 parts by weight of 2,5-dimethyl-1,2,5-di (tert-dibutylperoxy) hexine-3 [peroxide] 0.
- knead to form a foamable olefin-based thermoplastic elastomer ((i) the continuous phase in the micro-agglomerated structure is A discontinuous phase was a crystalline phase in the rubber phase, and (ii) a gel fraction: 4.2 wt%).
- a master patch (foamable olefin-based thermoplastic elastomer) was prepared by kneading 4 parts by weight of a mixture of sodium hydrogencarbonate and citric acid with 100 parts by weight of the obtained foamable olefin-based thermoplastic elastomer. did.
- the masterbatch was melted and dispersed again in a cylinder at 200 ° C, and then a foamable olefin thermoplastic elastomer was injected into a closed mold formed by upper and lower molds (injection).
- the conditions are: injection speed: 200 mm / s, mold temperature: 30 ° C).
- the foaming ratio of the molded product was 4.3 times (foaming ratio: specific gravity after foaming / specific gravity before foaming), the molded shape was good, and the feel was rubber-like. Good (Ascar C hardness: 21).
- Ethylene / propylene / non-conjugated diene copolymer rubber [EPT; ethylene content 38 mol 0 /. , Iodine value 12, MFR (ASTM 1238, 190.C, 2.16 kg load) 1. lg / 10 min] 75 parts by weight, polypropylene [PP; propylene content 100%, MFR (ASTM 1238, 190 ° C, 2.16 kg load) 5.
- Ethylene / propylene 'non-conjugated gen copolymer rubber [EPT; ethylene content 38 mol 0 /. , Iodine value 12, MFR (ASTM 1238, 190.C, 2.16 kg load) 1.1 / 10 minutes] 75 parts by weight, polypropylene [PP; propylene content 100%, MFR (ASTM 1238, 190.C , 2.16 kg load) 5 0/10 min]] 25 parts by weight of 2,5-dimethyl-2,5-di (tert-dibutylperoxy) hexyne- 1 [peroxide] 0.3 part by weight and trimethylolpropane Trimetarylate [auxiliary agent] Kneaded in the presence of 0.45 parts by weight of foamable olefin-based thermoplastic elastomer ((i) The continuous phase in the micro-aggregated structure is a rubber phase and the discontinuous phase is a crystalline phase , (Ii) gel fraction: 4.8 wt%)
- foamable olefin-based thermoplastic elastomer To 100 parts by weight of the obtained foamable olefin-based thermoplastic elastomer, 0.3 w% of nitrogen gas was melted and dispersed in a cylinder at 230 ° C, and then the mold formed from the upper and lower molds was closed. A foamable olefin thermoplastic elastomer was injected into the mold (injection conditions: injection speed: 20 Omm / s, mold temperature: 30 ° C).
- the molded product When the foamed molded product of the obtained olefin-based thermoplastic elastomer was taken out, the molded product had an expansion ratio of 3.1 (expansion ratio: specific gravity after foaming / specific gravity before foaming), a good molded shape, and a rubbery feel. The condition was good (Ascar C hardness: 35).
- Ethylene 'Propylene' non-conjugated gen copolymer rubber [EPT; Ethylene content 38 mol 0 /. , Iodine value 12, MFR (AS TM 1238, 190 ° C, 2.16 kg load) 1.
- the foaming ratio of the molded product was 2.3 times (foaming ratio: specific gravity after foaming / specific gravity before foaming), the molded shape was good, and the feel was rubber.
- the condition was good (Ascar C hardness: 38).
- Ethylene 'propylene' non-conjugated gen copolymer rubber [EPT; ethylene content 38 mol 0 /. , Iodine value 12, MFR (ASTM 1238, 190 ° C, 2.16 kg load) 1.1 g / 10 min] 50 parts by weight, polypropylene [PP; propylene content 100%, MFR (ASTM 1238, 190 ° C, 2.16 kg load) 5.0 / 10 min]] and 50 parts by weight of 2,5-dimethyl-2,5-di (tert-dibutylperoxy) hexine-3 [peroxide] 0 15 parts by weight and trimethylolpropane trimethacrylate [auxiliary agent] Kneaded in the presence of 0.2 parts by weight to form a foamable olefin-based thermoplastic elastomer ((i) the continuous phase in the micro-agglomerated structure is a crystalline phase As a result, a discontinuous phase was obtained as a rubber phase, and
- a master patch (expandable olefin-based thermoplastic elastomer) was prepared by kneading 4 parts by weight of a mixture of sodium hydrogen carbonate and citric acid with 100 parts by weight of the obtained olefin-based thermoplastic elastomer for foaming. did.
- This master patch was melted and dispersed again in a cylinder at 20 o ° c, and then foamable olefin-based thermoplastic gel and toma were injected into a closed mold formed by upper and lower molds. .
- Ethylene 'propylene' non-conjugated diene copolymer rubber [EPT; ethylene content 38 mol 0 /. , Iodine value 12, MFR (ASTM 1238, 190. C, 2.16 kg load) 1.1 g / 10 min] 80 parts by weight, polypropylene [PP; propylene Content 100%, MFR (ASTM 1238, 190.C, 2.16 kg load) 5.0 / 10 min]] 20 parts by weight of 2,5-dimethyl-1,2,5-di (tert-dibutyl Hexin-1 3 [peroxide] 0.5 parts by weight and trimethylolpropane trimethacrylate [auxiliaries] In the presence of 0.2 parts by weight, knead to form a foamable olefin thermoplastic elastomer.
- a foamable olefin thermoplastic elastomer was injected into a closed mold formed by upper and lower molds (injection conditions were: , Injection speed: 200mm / s, Mold temperature: 30. C).
- Ethylene / propylene / non-conjugated diene copolymer rubber [EPT; ethylene content 38 mol 0 /. , Iodine value 12, MFR (ASTM 1238, 190 ° C, 2.16 kg load) 1. 1 gZlO content] 75 parts by weight, polypropylene [PP; propylene content 100%, MFR (ASTM 1238, 190 units, 2.
- the foamed olefinic thermoplastic elastomer ((i) the continuous phase in the micro-agglomerated structure is a crystalline phase As a result, a discontinuous phase was obtained as a rubber phase, and (ii) a gel fraction: 48 wt%).
- compositional fraction of the raw materials is exactly the same as in Example 4, but the amount of peroxide is large, so the gel fraction is as high as 48%, and the raw materials are in the final Due to severe shearing and thermal history, the micro-agglomerated structure was reversed and the continuous phase was changed to a crystalline phase, which reduced the expansion ratio and made it harder and less flexible.
- compositions and evaluations of the above Examples and Comparative Examples are shown in Tables 1 and 2 below, respectively.
- the units in the table are parts by weight, and when a gas is used as a foaming agent, the unit is w t%.
- micrographs showing the microstructure of the orifice by a transmission electron microscope are shown in FIGS. 1 to 4.
- Example 1 Example 2 Example 3 Example 4 Example 5
- the units of the numbers other than the expansion ratio in the table are parts by weight, and when the blowing agent is gas, the unit is wt%.
- the units of the numbers other than the expansion ratio in the table are parts by weight, and when the blowing agent is gas, the unit is wt%.
- the degree of freedom of the expansion ratio which can be used for automobile interior material parts and the like, is high. It is possible to provide a recyclable foamed product that is flexible, has excellent cushioning properties and heat insulation properties, and has excellent in-mold foam moldability.
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- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
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- General Chemical & Material Sciences (AREA)
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Abstract
Description
Claims
Priority Applications (2)
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EP04793388A EP1679340A4 (en) | 2003-10-31 | 2004-10-29 | RESIN COMPOSITION FOR FOAM MOLDS, FOAM AND METHOD FOR MANUFACTURING FOAM |
US10/577,345 US20070082962A1 (en) | 2003-10-31 | 2004-10-29 | Resin composition for foam molding, foam and method for producing the foam |
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JP2003373755A JP2005133045A (ja) | 2003-10-31 | 2003-10-31 | 発泡成形用樹脂組成物、発泡体、および発泡体の製造方法 |
JP2003-373755 | 2003-10-31 |
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US (1) | US20070082962A1 (ja) |
EP (1) | EP1679340A4 (ja) |
JP (1) | JP2005133045A (ja) |
CN (1) | CN1875059A (ja) |
WO (1) | WO2005049706A1 (ja) |
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JP2006307070A (ja) * | 2005-04-28 | 2006-11-09 | Nhk Spring Co Ltd | 発泡体用樹脂組成物、発泡体、および発泡体の製造方法 |
EP2096135B1 (en) * | 2008-02-27 | 2012-07-04 | Airsec | Foamable polymer preparations and compositions comprising a foamed polymer and having high and rapid water absorption |
CN101560315B (zh) * | 2008-04-14 | 2012-08-29 | 上海大裕橡胶制品有限公司 | 改性发泡三元乙丙橡胶 |
DE202008014218U1 (de) * | 2008-10-24 | 2010-03-04 | Rehau Ag + Co | Thermoplastische Elastomere |
WO2011008845A1 (en) | 2009-07-14 | 2011-01-20 | Toray Plastics (America), Inc. | Crosslinked polyolefin foam sheet with exceptional softness, haptics, moldability, thermal stability and shear strength |
CN110461921B (zh) * | 2017-03-31 | 2023-02-21 | 积水化学工业株式会社 | 交联聚烯烃发泡体及使用了该交联聚烯烃发泡体的成型体 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58142917A (ja) * | 1982-02-18 | 1983-08-25 | Hitachi Chem Co Ltd | 架橋ポリプロピレンフォ−ムの製造方法 |
JPH09296063A (ja) * | 1996-03-04 | 1997-11-18 | Mitsui Petrochem Ind Ltd | 発泡性オレフィン系熱可塑性エラストマー組成物およびその発泡体 |
JP2003192853A (ja) * | 2001-12-27 | 2003-07-09 | Mitsui Chemicals Inc | 加硫可能なゴム組成物、加硫可能なゴム組成物の製造方法、加硫ゴム |
JP2004051793A (ja) * | 2002-07-19 | 2004-02-19 | Sunallomer Ltd | 改質ポリプロピレン系樹脂組成物およびその成形品 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2822815C2 (de) * | 1977-05-26 | 1994-02-17 | Mitsui Petrochemical Ind | Verfahren zur Herstellung einer teilweise vulkanisierten thermoplastischen Masse |
JP3456504B2 (ja) * | 1995-09-12 | 2003-10-14 | 三井化学株式会社 | 低圧圧縮成形用表皮材付き発泡パッド材 |
CA2198998C (en) * | 1996-03-04 | 2001-08-21 | Keiji Okada | Foamable olefin thermoplastic elastomer compositions and foamed products thereof |
JP4088429B2 (ja) * | 2000-07-05 | 2008-05-21 | 三井化学株式会社 | 加硫可能なゴム組成物 |
-
2003
- 2003-10-31 JP JP2003373755A patent/JP2005133045A/ja active Pending
-
2004
- 2004-10-29 WO PCT/JP2004/016468 patent/WO2005049706A1/ja active Application Filing
- 2004-10-29 CN CNA2004800325686A patent/CN1875059A/zh active Pending
- 2004-10-29 EP EP04793388A patent/EP1679340A4/en not_active Withdrawn
- 2004-10-29 US US10/577,345 patent/US20070082962A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58142917A (ja) * | 1982-02-18 | 1983-08-25 | Hitachi Chem Co Ltd | 架橋ポリプロピレンフォ−ムの製造方法 |
JPH09296063A (ja) * | 1996-03-04 | 1997-11-18 | Mitsui Petrochem Ind Ltd | 発泡性オレフィン系熱可塑性エラストマー組成物およびその発泡体 |
JP2003192853A (ja) * | 2001-12-27 | 2003-07-09 | Mitsui Chemicals Inc | 加硫可能なゴム組成物、加硫可能なゴム組成物の製造方法、加硫ゴム |
JP2004051793A (ja) * | 2002-07-19 | 2004-02-19 | Sunallomer Ltd | 改質ポリプロピレン系樹脂組成物およびその成形品 |
Non-Patent Citations (1)
Title |
---|
See also references of EP1679340A4 * |
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EP1679340A1 (en) | 2006-07-12 |
JP2005133045A (ja) | 2005-05-26 |
EP1679340A4 (en) | 2006-11-22 |
US20070082962A1 (en) | 2007-04-12 |
CN1875059A (zh) | 2006-12-06 |
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