WO1992013913A1 - Structure de composition de resine a base de polyolefine et sa production - Google Patents
Structure de composition de resine a base de polyolefine et sa production Download PDFInfo
- Publication number
- WO1992013913A1 WO1992013913A1 PCT/JP1992/000078 JP9200078W WO9213913A1 WO 1992013913 A1 WO1992013913 A1 WO 1992013913A1 JP 9200078 W JP9200078 W JP 9200078W WO 9213913 A1 WO9213913 A1 WO 9213913A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- resin
- component
- polyolefin
- thermoplastic polyester
- melt
- Prior art date
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Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
-
- 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
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
-
- 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
- C08L23/10—Homopolymers or copolymers of propene
-
- 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
- C08L23/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of 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
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
Definitions
- the present invention relates to a structure in which a polyolefin-based resin is used as a matrix, in which a thermoplastic polyester resin is dispersed in a network, and a method for producing the same, which is formed by an inexpensive and simple method, and is used as a molded article.
- An object of the present invention is to provide a resin molded product which retains the excellent characteristics of a polyolefin-based resin, and which has insufficient heat resistance and improved mechanical properties.
- Polyolefin-based resins are inexpensive, have relatively good properties as shochu, and are generally lightweight and can be used with a wide variety of mechanical properties. Therefore, they are widely used in various fields as general-purpose resin materials.
- polyolefin-based resins generally have a low glass transition temperature or a low melting point, and thus have a low heat deformation temperature, and generally have a drawback of being flexible and having a low elastic modulus. Therefore, despite its excellent shochu chemical properties and certain mechanical properties, there are problems in applications requiring heat resistance and rigidity in the fields of electric and electronic parts, automotive parts, etc. .
- As a method of improving heat resistance and rigidity (elastic modulus) it is generally conceivable to mix fillers such as inorganic textile fillers and plate-like fillers.
- a large amount of filler must be blended, and a large amount of these inorganic fillers increases the specific gravity of the material, countering the weight reduction characteristic of polyolefin resin, and The melt viscosity of the composition may increase, which may hinder the injection molding or the like.
- a heat-resistant resin having a high modulus of elasticity, a glass transition temperature, a melting point, etc. for example, a thermoplastic polyester resin.
- a large amount of compounding is required, which often impairs the properties of the polyolefin resin.
- thermoplastic polyester resin generally requires the resin component to be granular or layered. The fact is that it does not have sufficient improvement in heat resistance, etc., because it exhibits a dispersed form.
- the present invention improves the dispersion form when a relatively small amount of thermoplastic polyester resin is blended with the polyolefin resin, makes use of the characteristics of the polyolefin resin, and improves the mechanical properties such as heat resistance and elastic modulus. It is intended to improve significantly.
- the inventors of the present invention have conducted intensive studies on the control of the dispersion form of polyolefin resin and a relatively small amount of thermoplastic polyester resin in a polymer blend, and as a result, a specific filler was used in combination with melting.
- a composition structure in which the thermoplastic polyester resin is dispersed in a network in the polyolefin resin is formed.
- the present inventors have found that the network structure has remarkably improved heat resistance and rigidity without significantly impairing the inherent properties of the morpholine-based resin, and have arrived at the present invention.
- the present invention when the polyolefin-based resin A is used as a matrix and the thermoplastic polyester resin B is melt-kneaded, the surface tension at the melt-kneading temperature is larger than that of the component B, and the average particle diameter is 0.
- a and B components which are characterized by melting and kneading a filler C having a size of from 05 to 50 m in a blending amount satisfying the following formulas (1) and (2), form a network
- the present invention relates to a method for producing a dispersed composition structure and a molded article comprising the composition structure obtained by the production method.
- FIG. 1 is a schematic diagram showing the form of dispersion of particles in a conventional polymer blend system, which is a polyolefin resin A, which is a matrix resin.
- the relatively low content of the thermoplastic polyester resin B exhibits a dispersed form II separated into particles.
- FIG. 2 is a schematic view showing the interpenetrating network structure of the present invention.
- thermoplastic polyester resin B contains a specific filler C, and the thermoplastic polyester resin Despite the low B content, the polyolefin-based resin A and the thermoplastic polyester resin B form a network with each other, and have an intertwined structure to form a connected phase.
- thermoplastic polyester resin B with respect to the polyolefin resin A generally has a network structure in which most of the thermoplastic polyester resin B are substantially connected to each other, and exhibits such a dispersion form.
- the present invention has a feature that the heat resistance, rigidity and the like are remarkably improved as compared with a case where a thermoplastic polyester resin is simply blended, even though a relatively small amount is blended.
- Such a dispersed structure can be confirmed by appropriately pulverizing or cutting a formed structure, for example, a molded piece, and dissolving and removing the component A, which is a matrix, with an appropriate solvent. it can.
- component A which is a matrix
- component B When component B is dispersed in a network, it retains its shape even after matrix A is dissolved and removed, whereas it is separated into particles or layers and dispersed. In some cases, it can be understood from the fact that the form has collapsed and the original form cannot be maintained.
- a portion existing in a mesh shape can be almost quantitatively known by separating the matrix with an appropriate sieve.
- polystyrene-based resin of Component A used in the present invention examples include polyethylene, polypropylene, polybutyrene, and polymethylpentene, and ethylene, propylene copolymer, ethylene propylene-gen copolymer, In addition, a polymer or copolymer containing an olefin-based unit as a main component is also exemplified. These polyolefin resins can be used as one kind or as a mixture of two or more kinds.
- the thermoplastic polyester resin of component B used in the present invention includes terephthalic acid, naphthalenedicarboxylic acid, 4,4-diphenyldicarboxylic acid, diphenyletherdicarboxylic acid, and ⁇ -bis (4-carboxy) as constituent components.
- Phenoxy) one or more dicarboxylic acids or ester derivatives thereof such as ethane, adipic acid, sebacic acid, azelaic acid, decanedicarboxylic acid, dodecanedicarboxylic acid, cyclohexanedicarboxylic acid, and dimer acid; and ethylene.
- glycol propylene glycol, butanediol, pentanediol, neopentyl glycol, hexanediol, octanediol, decanediol, cyclohexanedimethanol, hydroquinone, bisphenol II, 2,2-bis (4 ' ⁇ Hydroxetoxy Enyl) Polycondensation with one or more glycols such as pronon, xylene glycol, polyethylene glycol, polytetramethylene glycol, and aliphatic polyester oligomers having hydroxyl groups at both ends.
- Thermoplastic polyester resin It may be any of polyesters.
- comonomer components for composing the copolyester include hydroxycarboxylic acids such as glycolic acid, hydroxyacid, hydroxybenzoic acid, hydroxyphenoxyacetic acid, and naphthylglycolic acid, and propiolactone. Lactone compounds such as, butyrolactone, cabrolactone, and reloractone can be used, and trimethylolpropane, trimethyloluretan, and pentaerythritol can be used as long as thermoplasticity can be maintained. Polyesters having a branched or cross-linked structure using a polyfunctional ester-forming component such as tall, trimellitic acid, trimesic acid, and pyromellitic acid may be used.
- hydroxycarboxylic acids such as glycolic acid, hydroxyacid, hydroxybenzoic acid, hydroxyphenoxyacetic acid, and naphthylglycolic acid
- lactone compounds such as, butyrolactone, cabrolactone, and reloract
- polyester copolymers having halogens using compounds having an aromatic nucleus as a substituent and having an ester-forming group are also included. ⁇ These thermoplastic polyester resins are used as component B. One or more kinds can be used in combination.
- thermoplastic polyester resins are polyalkylene terephthalates such as poly (ethylene terephthalate) and poly (butylene terephthalate) and copolymers containing these as main components, and are used as comonomer components for forming the copolymer.
- Particularly preferred are isophthalic acid, bisphenol A, 2,2-bis (S-hydroxyethoxyethoxyphenyl) propane, 2,2-bis ( ⁇ -hydroxyxethoxy trabromophenyl) propane and the like.
- the mixing ratio of the components A and B is such that the component B is 5 to 50%, preferably 10 to 40% of the total weight of the components A and B. If the amount of component B is too small, the desired heat resistance and elastic modulus, etc., effects of the present invention cannot be obtained, and if it is too large, the inherent properties of the polyolefin resin are lost, which is not preferable. .
- the component C has a surface tension at the melt-kneading temperature at least larger than the surface tension of the component B at the same temperature, and preferably the surface tension difference with the component B is larger than 2 dyn / cm. Things.
- the hanging drop method is a method of estimating the surface tension of a liquid from the shape behavior of a liquid drop in which a sample is placed vertically and a sample is placed inside the pipe and hangs at the end of the pipe.
- the critical surface tension can be determined and evaluated by the contact angle method calculated by the Zisman plot method (for details, see the examples below).
- melt kneading temperature definitive surface tension of the polyolefin down resin A is smaller than that of the thermoplastic Boriesuteru resin B, the way the surface tension values at 250 e C of Poriore Fi emission resin A is 18 ⁇ 28dyn / cm (Example For example, polyethylene is about 23 dyn / cm, polypropylene is about 19 dyn / cm), and the value of thermoplastic polyester resin B is about 30-40 dyn / cm (for example, polyethylene terephthalate is about 30 dyn / cm, and polybutylene terephthalate is about 30 dyn / cm. Is about 36 dyn / cm).
- the filler of component C is preferably in the form of powder (or fiber) having an average particle size (or average fiber length) of 0.05 to 50 ⁇ m, and more preferably 0. 1 to 10 zm.
- the compounding amount of the component C is suitably from 10 to 70%, and preferably from 20 to 60%, based on the total weight of the components B and C. If the amount is too small, the effect of the present invention is not easily exerted. If the amount is too large, the properties are unfavorably affected.
- the expression of the network dispersion form of the present invention is based on the fact that the component C satisfying the above conditions is present at the time of melt-kneading, so that the component C in the form of particles is selectively included by the component B under the influence of the relative surface tension.
- the component B containing a large number of the component C extends in a branch shape in conjunction with the movement and dispersion by kneading of the component C and joins to form a network structure.
- the filler of component C satisfies the above conditions, and may be an inorganic filler or an organic filler as long as the surface tension value is greater than the value of component B at the melt-kneading temperature as described above.
- the shape may be any shape such as an arrowhead shape, a powdery particle shape, a plate shape, and other purposes.
- inorganic fillers include glass fiber, asbestos moist fiber, silica fiber, silica-alumina fiber, alumina fiber, zirconia fiber, boron nitride fiber, silicon nitride fiber, boron fiber, Inorganic fibrous substances with an average fiber length of 50 m or less, such as calcium titanate fiber, or carbon black, graphite, silica, quartz powder, glass beads, milled glass fiber, glass balloon, glass powder, silicate calcium Silicates such as aluminum, aluminum silicate, kaolin, talc, cres, diatomaceous earth, pearlite, iron oxide, titanium oxide, zinc oxide, antimony trioxide, metal oxides such as alumina, calcium carbonate, Carbonation of metals such as magnesium carbonate Metal, sulfuric acid circles such as salt, calcium sulfate, barium sulfate, etc., powders, granular or plate-like fillers with average diameters of the following: powder, silicon carbide, silicon nitride, boronit
- a filler composed of a heat-resistant, high-melting thermoplastic resin, a thermosetting resin, or the like can be used as long as the above conditions are satisfied.
- an aromatic boramide resin, an aromatic borimide resin, a liquid crystal polymer, a melamine resin, a phenol resin, an epoxy resin, etc. are effective as Component C as long as the above conditions are satisfied.
- These powders may be used alone or in combination of two or more.
- fillers can be used as component C by adjusting the surface tension by performing a surface treatment with an appropriate surface treatment agent or the like, if necessary.
- additives such as a lubricant, a lubricant, a nucleating agent, a dye and a pigment, Molding agents, antioxidants, thermal stabilizers, weather (light) stabilizers, reinforcing agents, hydrolysis stabilizers, other thermoplastic resins other than components A and B, fillers other than component C, etc. May be blended.
- composition of the present invention can be prepared by various known methods.However, it is preferable that the composition is heated and melted in the presence of at least three components of A, B, and C and kneaded for 30 seconds or more.
- the above components may be used in combination at the same time, or may be added separately.
- A, B, C Pre-equilibrate the ingredients with a kneader such as a tumbler or Hensiel mixer.
- the mixture may be fed to a single- or twin-screw extruder and melt-kneaded to form a pellet, which may be used for molding or may be directly molded.
- the melt kneading referred to herein is desirably performed at a melting temperature at a shear rate of ⁇ sec- 1 or more. Particularly preferred shear rates are between 100 and 500 sec.
- Treatment temperature is 5 a to 100 ° C higher temperature than ⁇ the resin component is melted, particularly preferred properly is 10 a to 60 e C above the melting point. If the temperature is too high, decomposition or abnormal reaction occurs, which is not preferable.
- the melt-kneading time is 30 seconds to 15 minutes, preferably 1 to 10 minutes.
- the polyolefin resin composition structure of the present invention has a structure in which a thermoplastic polyester resin is dispersed in a network in a polyolefin resin, can be formed by a simple method, and has the features of the polyolefin resin. It is a resin composition that retains and improves heat resistance such as heat distortion temperature and mechanical properties such as elastic modulus compared to a conventional composition (particulate separation and dispersion) that simply blends both components. There is expected.
- Figure 1 is a schematic diagram showing the state of dispersion of a structure by a conventional polymer blend system.
- FIG. 2 is a schematic view showing a dispersed state of the structure according to the present invention.
- Examples 1-2 For the surface tension values (250 ° C) shown in Table 1, (A) polypropylene (manufactured by Mitsui Petrochemical Industries, Ltd., Hypole J400), (B) polyethylene terephthalate (manufactured by Kanebo Co., Ltd.) Berpet EFG-7) and (C) talc (manufactured by Fuji Talc Kogyo Co., Ltd., average particle size 2 or 20 / m) were mixed in the proportions shown in Table 1, and at a set temperature of 250 ° C, the inner diameter was 30 Using a shaft extruder, the mixture was melt-kneaded at a screw rotation speed of 80 rpm (shear speed: about 100 sec) and pelletized. Next, test pieces were prepared from the pellets using an injection molding machine, and the following characteristics were evaluated. The results are shown in Table 1.
- thermoplastic polyester resin A molded piece cut into a piece of 10 x 10 x 3 mm was placed in a xylene solution, and treated with 120 for 12 hours to dissolve the polyolefin resin as a matrix resin. The morphological change was observed with an electron microscope, and the dispersed state of the thermoplastic polyester resin that did not dissolve under these conditions was examined.
- the thermoplastic polyester resin is in the form of particles dispersed as in the prior art, the form of the molded piece does not remain, and only a deposit of the particulate thermoplastic polyester resin is observed.
- thermoplastic polyester resin has an interpenetrating network structure as in the present invention
- the molded piece retains its shape, which can be observed with the naked eye or an optical microscope. Further, when observed by enlarging with a scanning electron microscope, the interpenetrating network structure can be more clearly confirmed.
- the matrix resin A was dissolved and removed by the above-mentioned method, then separated by a 12-mesh sieve, and the remaining weight was examined. Although the particulate dispersion portion does not pass through the sieve but remains in the network structure portion, the remaining weight% means the weight of (B + C) in the mesh structure 0
- Heat distortion temperature Measured under a load of 18.6 kg according to the method of ASTM D648. Comparative Examples 1 to 5
- a molded piece was prepared and evaluated in the same manner as in Example 1 except that the amounts of components A, B, and C were changed as shown in Table 2. Table 2 shows the evaluation results.
- Example 1 The talc of Example 1 was replaced with calcium carbonate (Shiraishi Kogyo ( Co., Ltd., average particle size 1 m), silicone rubber particles (Toray Silicone Co., Ltd., R-930, average particle size 1 ⁇ ), and acrylic rubber particles (Mitsubishi Rayon Co., Ltd., W529 A molded piece was prepared and evaluated in the same manner as in Example 1 except that the average particle diameter was changed to 0.3 ⁇ 111). Table 3 shows the evaluation results. Examples 8 to 12, Comparative Examples 11 to 15
- the polypropylene of Example 1 was used as the component ⁇ as polyethylene (HIZEX 210 JH), manufactured by Mitsui Ishi Oil & Chemicals Co., Ltd., and Bolibutene M 8340 (manufactured by Mitsui Petrochemical Co., Ltd.).
- the composition was changed to that of Polyethylene terephthalate, which was changed to Polybutyrene terephthalate (2002, manufactured by Polybutyrics Co., Ltd.) as the component B, the components were blended in the proportions shown in Table 4. It was molded in the same manner as in Example 1 and evaluated. The results are shown in Table 4.
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019920701875A KR927003696A (ko) | 1991-01-30 | 1992-01-28 | 폴리올레핀 수지 조성물의 구조 및 이의 제조방법 |
BR929204093A BR9204093A (pt) | 1991-01-30 | 1992-01-28 | Processo para a producao de uma estrutura de composicao de resina poliolefinica e produto de moldagem com a mesma |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP03009784A JP3137347B2 (ja) | 1991-01-30 | 1991-01-30 | ポリオレフィン系樹脂組成物構造体及びその製造法 |
JP3/9784 | 1991-01-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1992013913A1 true WO1992013913A1 (fr) | 1992-08-20 |
Family
ID=11729860
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1992/000078 WO1992013913A1 (fr) | 1991-01-30 | 1992-01-28 | Structure de composition de resine a base de polyolefine et sa production |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0522174A4 (ja) |
JP (1) | JP3137347B2 (ja) |
KR (1) | KR927003696A (ja) |
BR (1) | BR9204093A (ja) |
CA (1) | CA2072359A1 (ja) |
WO (1) | WO1992013913A1 (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU2003241749A1 (en) * | 2002-06-03 | 2003-12-19 | Yoshitaka Etho | Polyester composition and packaging material comprising the same |
CN1300239C (zh) * | 2004-05-27 | 2007-02-14 | 上海交通大学 | 一种抗静电和导电聚丙烯共混物的制备方法 |
CN102575076B (zh) * | 2009-09-29 | 2014-08-20 | 普立万公司 | 具有模拟金属或珠光外观的聚酯制品 |
KR200493321Y1 (ko) | 2019-05-20 | 2021-03-10 | 변성철 | 건축물 내외장재 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50151243A (ja) * | 1974-05-29 | 1975-12-04 | ||
JPS5377238A (en) * | 1976-12-20 | 1978-07-08 | Tokuyama Soda Co Ltd | Polyolefin composition |
JPS53108142A (en) * | 1977-03-03 | 1978-09-20 | Toray Ind Inc | Wear-resistant material |
-
1991
- 1991-01-30 JP JP03009784A patent/JP3137347B2/ja not_active Expired - Fee Related
-
1992
- 1992-01-28 KR KR1019920701875A patent/KR927003696A/ko not_active Application Discontinuation
- 1992-01-28 EP EP19920903716 patent/EP0522174A4/en not_active Withdrawn
- 1992-01-28 WO PCT/JP1992/000078 patent/WO1992013913A1/ja not_active Application Discontinuation
- 1992-01-28 CA CA002072359A patent/CA2072359A1/en not_active Abandoned
- 1992-01-28 BR BR929204093A patent/BR9204093A/pt not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50151243A (ja) * | 1974-05-29 | 1975-12-04 | ||
JPS5377238A (en) * | 1976-12-20 | 1978-07-08 | Tokuyama Soda Co Ltd | Polyolefin composition |
JPS53108142A (en) * | 1977-03-03 | 1978-09-20 | Toray Ind Inc | Wear-resistant material |
Also Published As
Publication number | Publication date |
---|---|
JP3137347B2 (ja) | 2001-02-19 |
EP0522174A1 (en) | 1993-01-13 |
KR927003696A (ko) | 1992-12-18 |
JPH04253733A (ja) | 1992-09-09 |
BR9204093A (pt) | 1993-06-08 |
EP0522174A4 (en) | 1993-09-22 |
CA2072359A1 (en) | 1992-07-31 |
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