WO2012049896A1 - Composition de résine polylactique et corps moulé en résine polylactique - Google Patents

Composition de résine polylactique et corps moulé en résine polylactique Download PDF

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Publication number
WO2012049896A1
WO2012049896A1 PCT/JP2011/066216 JP2011066216W WO2012049896A1 WO 2012049896 A1 WO2012049896 A1 WO 2012049896A1 JP 2011066216 W JP2011066216 W JP 2011066216W WO 2012049896 A1 WO2012049896 A1 WO 2012049896A1
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polylactic acid
acid resin
resin composition
resin
mass
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PCT/JP2011/066216
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English (en)
Japanese (ja)
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直樹 森下
幸浩 木内
位地　正年
曽山　誠
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日本電気株式会社
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Priority to JP2012538593A priority Critical patent/JPWO2012049896A1/ja
Publication of WO2012049896A1 publication Critical patent/WO2012049896A1/fr

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    • 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
    • C08K5/00—Use of organic ingredients
    • C08K5/49—Phosphorus-containing compounds
    • C08K5/5399—Phosphorus bound to nitrogen

Definitions

  • the present invention relates to a polylactic acid resin composition and a polylactic acid resin molded article.
  • Polyhydroxycarboxylic acid including polylactic acid has relatively excellent moldability, toughness, rigidity and the like.
  • polylactic acid can be synthesized from natural raw materials such as corn, and has excellent molding processability, biodegradability, and the like, and therefore has been developed in various fields as an environmentally friendly resin.
  • polylactic acid is generally flammable. For example, it is necessary to make it flame retardant when used in applications that require high flame retardance, such as exterior materials for electrical and electronic equipment. is there. Therefore, many attempts have been made to impart flame retardancy to a resin composition containing a polylactic acid resin.
  • biodegradable polyester ie, polylactic acid and polybutylene succinate adipate lactide are mixed with at least a polyfunctional monomer, crosslinked with radiation, and further phosphorus-based flame retardant, melamine-based flame retardant, metal hydrate, nitrogen-based flame retardant
  • a resin composition containing at least one flame retardant selected from a flame retardant and a silane-based flame retardant has been proposed (Patent Document 1).
  • Patent Document 1 high flame retardancy is achieved by adding 11 phr or more of a phosphoric acid ester to 100 parts by mass of the polylactic acid resin.
  • Patent Document 2 10 phr of an aromatic phosphate is added to 100 parts by mass of the polylactic acid resin.
  • Patent Document 3 A polylactic acid resin composition and a polylactic acid resin molded article that have both good properties and excellent molecular weight retention have been proposed (Patent Document 3).
  • Patent Document 3 since there is a large difference in polarity between the polylactic acid resin and the phosphorus compound, there is a limit to the upper limit of the concentration of the phosphorus compound that can be added. For this reason, when the amount of the phosphorus compound is increased to an amount required to achieve both good flame retardancy and mechanical properties such as impact resistance, a large amount of bleed material may be generated on the surface of the molded body.
  • an object of the present invention is to provide a polylactic acid resin composition and a polylactic acid resin molded article having high flame retardancy and heat resistance and further having excellent bleed resistance.
  • the polylactic acid resin composition of the present invention includes a polylactic acid resin, a metal hydroxide, a flame retardant, and a reinforcing fiber having a moisture content of 0.1% or less. To do.
  • the polylactic acid resin molded article of the present invention is characterized by being molded with the polylactic acid resin composition of the present invention.
  • the polylactic acid resin composition and the polylactic acid resin molded article of the present invention have high flame retardancy and heat resistance, and further excellent bleed resistance.
  • the polylactic acid resin composition of the present invention includes a polylactic acid resin, a metal hydroxide, a flame retardant, and a reinforcing fiber having a moisture content of 0.1% or less.
  • the present inventors diligently investigated the improvement of flame retardancy, heat resistance and bleed resistance of polylactic acid resin and the compatibility of these properties.
  • a flame retardant such as a phosphorus compound having a low polarity is likely to migrate to the surface of the molded body and may promote bleeding of the flame retardant.
  • these mechanisms are estimations and do not limit the present invention.
  • copolymers examples include L-lactic acid, D-lactic acid and derivatives thereof, for example, glycolic acid, polyhydroxybutyric acid, polycaprolactone, polybutylene succinate, polyethylene succinate, polybutylene adipate terephthalate, polybutylene succinate. Mention may be made of copolymers obtained from one or more of terephthalate, polyhydroxyalkanoate and the like. Among these, from the viewpoint of saving petroleum resources, those derived from plants are preferable. From the viewpoint of heat resistance and moldability, poly (L-lactic acid), poly (D-lactic acid) and their co-products are preferred. Polymers are particularly preferred. Polylactic acid mainly composed of poly (L-lactic acid) has a melting point of 160 ° C. or higher in consideration of the mechanical properties and heat resistance of the molded product, although the melting point varies depending on the ratio of the D-lactic acid component. Is preferred.
  • polylactic acid resin is polymerized by cross-linking polylactic acid resin with a compound capable of reacting with polylactic acid resin such as carbodiimide compound, compound having epoxy group, compound having amino group, compound having aliphatic unsaturated double bond, etc. Lactic acid resin can also be used.
  • the compound having an epoxy group, the compound having an amino group, and the compound having an aliphatic unsaturated double bond include siloxane compounds having these functional groups.
  • metal hydroxide examples include aluminum hydroxide, magnesium hydroxide, dosonite, calcium aluminate hydrate, hydrated gypsum, calcium hydroxide, zinc borate, barium metaborate, borax, and kaolinite. Can be mentioned. Among these, at least one or a mixture of two or more selected from aluminum hydroxide, magnesium hydroxide, and calcium hydroxide is preferable, and aluminum hydroxide is more preferable.
  • the metal hydroxide is preferably made of a granular material having an average particle diameter of 10 ⁇ m or less, and more preferably made of a granular material having an average particle diameter of 0.1 ⁇ m to 5 ⁇ m.
  • the average particle diameter of the metal hydroxide can be determined by measuring the volume-based median diameter by, for example, the diffraction / scattering method. Examples of a commercially available apparatus capable of measuring the average particle diameter include a laser diffraction particle size distribution measuring apparatus SALD-3100 (trade name) manufactured by Shimadzu Corporation.
  • the metal hydroxide may be subjected to a surface treatment with a silane coupling agent.
  • the method for obtaining the metal hydroxide surface-treated with the silane coupling agent is not particularly limited.
  • a solution obtained by dissolving the silane coupling agent in a solvent such as acetone, ethyl acetate, toluene examples thereof include a method of spraying or coating the surface of a metal hydroxide having a substance content of 0.2% by mass or less and then drying to remove the solvent.
  • the flame retardancy can be increased by adding the metal hydroxide.
  • This flame retardant improvement effect is considered to be due to the endotherm during the thermal decomposition of the metal hydroxide, the endothermic effect caused by the water generated during the thermal decomposition, and the diluting effect of the combustible gas.
  • the addition of the metal hydroxide does not hinder the effect of diluting the flammable gas with the above-described flame retardant such as a phosphorus compound.
  • the compounding amount of the metal hydroxide can be set in a range of 30 to 150 parts by mass with respect to 100 parts by mass of the polylactic acid resin as a total amount of the metal hydroxide and a flame retardant such as a phosphorus compound.
  • the polylactic acid resin composition of the present invention further contains a flame retardant.
  • a flame retardant a phosphorus compound is preferable.
  • a phosphazene derivative and an aromatic condensed phosphoric acid ester are more preferable because they are excellent in flame retardancy, and a phosphazene derivative is particularly preferable.
  • the phosphazene derivative include cyclic cyclophosphazene compounds represented by the following formula (2).
  • n represents an integer of 3 or more, preferably in the range of 3 to 25, and more preferably in the range of 3 to 5. If n is 3, a 6-membered ring is formed by P (phosphorus element) and N (nitrogen element). If n is 4, an 8-membered ring is formed by P and N. The same applies when n is 5 or more.
  • R 1 and R 2 each represents an organic group, for example, a substituted or unsubstituted phenoxy group or a substituted or unsubstituted naphthoxy group (for example, ⁇ -naphthoxy group).
  • aromatic condensed phosphoric acid ester resorcinol bis diphenyl phosphate, bisphenol A, bis diphenyl phosphate, resorcinol - bis-2,6 carboxymethyl les sulfonyl phosphate, resorcinol - bis-2,6-bis diphenyl phosphate, biphenol -
  • aromatic condensed phosphoric acid ester resorcinol bis diphenyl phosphate, bisphenol A, bis diphenyl phosphate, resorcinol - bis-2,6 carboxymethyl les sulfonyl phosphate, resorcinol - bis-2,6-bis diphenyl phosphate, biphenol -
  • examples thereof include bisphenyl phosphate and 4,4′-bis (diphenylphosphoryl) -1,1′-biphenyl.
  • the content of the flame retardant such as the phosphorus compound is preferably determined while confirming the effect, but from the viewpoint of improving the flame retardancy, it is preferably 1 part by mass or more with respect to 100 parts by mass of the polylactic acid resin.
  • the amount is more preferably 2 parts by mass or more, and further preferably 3 parts by mass or more.
  • it is preferably 30 parts by mass or less, more preferably 20 parts by mass or less, and further preferably 10 parts by mass or less with respect to 100 parts by mass of the polylactic acid resin. .
  • inorganic fibers include metal fibers, glass fibers, metal silicate fibers, inorganic oxide fibers, and inorganic nitride fibers.
  • organic synthetic fibers include polyamide fibers and polyarylate fibers.
  • Reinforcing fibers may be used alone or in combination of two or more. Two or more kinds of inorganic fibers, organic synthetic fibers and plant-derived natural fibers may be mixed and used, and preferably contain at least inorganic fibers. By including the reinforcing fiber, it is possible to obtain a thermal deformation preventing effect and a drip suppressing effect of the molded body.
  • the shape of the reinforcing fiber may be circular in fiber cross section, but may be polygonal, indeterminate or uneven. From the viewpoint of increasing the bonding area with the resin, those having irregularities with a high aspect ratio and those having a small fiber diameter are desirable.
  • the reinforcing fiber can be subjected to a surface treatment in order to enhance the affinity with the resin serving as the base material or the entanglement between the fibers.
  • a surface treatment agent such as treatment with a coupling agent such as silane or titanate, treatment with an alkyl phosphate ester type surfactant, treatment with ozone or plasma, and the like are effective.
  • the glass fiber is preferably treated with a surface treatment agent.
  • the surface treatment agent preferably contains at least one resin selected from a polyolefin resin and a resin having a functional group having an epoxy group, from the viewpoint of excellent bleed resistance.
  • the average fiber length of the reinforcing fibers is preferably in the range of 0.1 mm to 20 mm, and more preferably in the range of 0.1 mm to 10 mm. Further, it preferably contains fibers having a fiber length of 300 ⁇ m to 20 mm. Although there is no restriction
  • a hydrolysis inhibitor, a fluorine-containing resin and the like can be added to the polylactic acid resin composition of the present invention as necessary.
  • carbodiimide compound (polycarbodiimide) having two or more carbodiimide groups examples include aliphatic polycarbodiimides such as poly (4,4′-dicyclohexylmethanecarbodiimide); poly (4,4′-diphenylmethanecarbodiimide), poly (p- Phenylenecarbodiimide), poly (m-phenylenecarbodiimide), poly (methylphenylenecarbodiimide), poly (diisopropylphenylenecarbodiimide), poly (methyldiisopropylphenylenecarbodiimide), poly (1,3,5-triisopropylphenylenecarbodiimide), poly ( And aromatic polycarbodiimides such as 1,3,5-triisopropylpheny
  • an aliphatic polycarbodiimide having an alicyclic structure such as a cyclohexane ring is preferable.
  • polycarbodiimide in which the organic linking group R in the general formula “— (N ⁇ C ⁇ N—R) n—” includes at least an alicyclic divalent group such as a cyclohexylene group.
  • poly (4,4'-dicyclohexylmethanecarbodiimide) can be preferably used.
  • the blending ratio (mass ratio) of aliphatic carbodiimide and aromatic carbodiimide can be set, for example, in the range of 1/9 to 9/1, preferably in the range of 3/7 to 7/3, and in the range of 4/6 to 6/4. Can be set to a range.
  • the amount of the carbodiimide compound is too large, the effect according to the amount added cannot be obtained, so it can be set to 20 parts by mass or less, such as resin moldability, bleed resistance, production cost, etc. From the viewpoint, 10 parts by mass or less is preferable, and 5 parts by mass or less is more preferable.
  • the fluorine-containing resin is preferably a fiber-forming resin (that forms a fibril-like structure), and is a fluorinated polyethylene such as polytetrafluoroethylene or a tetrafluoroethylene copolymer (for example, a tetrafluoroethylene / hexafluoropropylene copolymer). Polymer).
  • the content of the fluorine-containing resin is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, based on the whole polylactic acid resin composition, from the viewpoint of obtaining a sufficient addition effect. On the other hand, 5 mass% or less is preferable and 1 mass% or less is more preferable from points, such as manufacture (granulation) of a resin composition.
  • crystal nucleating agents impact resistance improvers, plasticizers, other resins, antioxidants, lubricants, and the like may be added as long as the function of the polylactic acid resin composition of the present invention is not impaired.
  • a crystal nucleating agent may be used in the molding of a molded body in order to further promote crystallization of an amorphous component having a low flow initiation temperature.
  • the crystal nucleating agent itself becomes a crystal nucleus during molding of a molded body, and acts to arrange resin constituent molecules in a regular three-dimensional structure, so that the moldability of the molded body, shortening of molding time, mechanical Strength and heat resistance can be improved.
  • the crystal nucleating agent promotes crystallization of the amorphous component, so that deformation of the molded body is suppressed even when the mold temperature during molding is high, and mold release after molding is easy. To. The same effect can be obtained even when the mold temperature is higher than the glass transition temperature (Tg) of the resin.
  • crystal nucleating agent examples include inorganic crystal nucleating agents and organic crystal nucleating agents.
  • examples of the inorganic crystal nucleating agent include talc, calcium carbonate, mica, boron nitride, synthetic silicic acid, silicate, silica, kaolin, carbon black, zinc white, montmorillonite, clay mineral, basic magnesium carbonate, and quartz powder. Glass fiber, glass powder, diatomaceous earth, dolomite powder, titanium oxide, zinc oxide, antimony oxide, barium sulfate, calcium sulfate, alumina, calcium silicate, boron nitride and the like can be used.
  • Organic carboxylic acid alkali metal salt and organic carboxylic acid alkaline earth metal salt alkali metal salt and alkaline earth metal salt of organic carboxylic acid
  • Polymer organic compound having carboxyl group metal salt carboxyl group-containing polyethylene obtained by oxidation of polyethylene, carboxyl group-containing polypropylene obtained by oxidation of polypropylene, olefins such as ethylene, propylene, butene-1 and acrylic Metal salts such as copolymers of acid or methacrylic acid, copolymers of styrene and acrylic acid or methacrylic acid, copolymers of olefins and maleic anhydride, copolymers of styrene and maleic anhydride, etc.
  • Organic compounds of phosphoric acid or phosphorous acid and their metal salts diphenyl phosphate, diphenyl phosphite, sodium bis (4-tert-butylphenyl) phosphate, methylene phosphate (2,4-tert- Butylphenyl) sodium, etc.
  • sorbitol derivatives such as bis (p-methylbenzylidene) sorbitol, bis (p-ethylbenzylidene) sorbitol, (8) Cholesterol derivatives such as cholesteryl stearate and cholesteryloxy system aramid, (9) Thioglycolic anhydride, p-toluenesulfonic acid, p-toluenesulfonic acid amide and their metal salts can be mentioned.
  • a crystal nucleating agent composed of a neutral substance that does not promote hydrolysis of polyester is preferable because the polylactic acid resin composition can be prevented from undergoing hydrolysis and the molecular weight can be suppressed.
  • an ester or amide compound that is a derivative thereof is preferable to a crystal nucleating agent having a carboxy group, and similarly has a hydroxy group.
  • An ester or an ether compound which is a derivative thereof is preferable to a crystal nucleating agent.
  • a layered compound such as talc which is compatible or finely dispersed with a resin in a high-temperature molten state in injection molding or the like, precipitates or phase-separates in a molding cooling step in a mold, and acts as a crystal nucleus.
  • a layered compound such as talc, which is compatible or finely dispersed with a resin in a high-temperature molten state in injection molding or the like, precipitates or phase-separates in a molding cooling step in a mold, and acts as a crystal nucleus.
  • an inorganic crystal nucleating agent and an organic crystal nucleating agent may be used in combination, or a plurality of types may be used in combination.
  • the content of the crystal nucleating agent is preferably in the range of 0.1% by mass to 20% by mass in the composition.
  • heat stabilizers and antioxidants include hindered phenols, phosphorus compounds, hindered amines, sulfur compounds, copper compounds, alkali metal halides, vitamin E, and the like. These are preferably used in the range of 0.5% by mass or less with respect to the polylactic acid resin.
  • filler examples include glass beads, glass flakes, talc powder, clay powder, mica, wollastonite powder, and silica powder.
  • ⁇ Flexible ingredients can be used as the impact resistance improver.
  • the soft component include a block in which a polymer block (copolymer) such as a polyester segment, a polyether segment, and a polyhydroxycarboxylic acid segment, a polylactic acid segment, an aromatic polyester segment, and a polyalkylene ether segment are bonded to each other.
  • Copolymer block copolymer composed of polylactic acid segment and polycaprolactone segment, polymer based on unsaturated carboxylic acid alkyl ester unit, polybutylene succinate, polyethylene succinate, polycaprolactone, polyethylene adipate, polypropylene adipate , Aliphatic polyesters such as polybutylene adipate, polyhexene adipate, polybutylene succinate adipate, polyethylene glycol and its Ether, polyglycerol acetic ester, epoxidized soybean oil, epoxidized linseed oil, epoxidized linseed oil fatty acid butyl, adipic acid based aliphatic polyester, acetyl tributyl citrate, acetyl ricinoleic acid ester, sucrose fatty acid esters, sorbitan fatty acid esters, Examples thereof include plasticizers such as adipic acid dialkyl ester and alkylphthal
  • Polylactic acid resin composition of the present invention further, other thermoplastic resin as needed, for example, polypropylene, polystyrene, ABS, nylon, polyethylene terephthalate, polybutylene terephthalate, polycarbonate, may include those alloys, and the like. It is preferable to use a thermosetting resin having crystallinity, for example, polypropylene, nylon, polyethylene terephthalate, polybutylene terephthalate, alloys with these polylactic acid resins, and the like.
  • the polylactic acid resin composition of the present invention further includes phenol resin, urea resin, melamine resin, alkyd resin, acrylic resin, unsaturated polyester resin, diallyl phthalate resin, epoxy resin, silicone resin, cyanate resin, isocyanate resin, furan resin, ketone resin, xylene resin, thermosetting polyimide, thermosetting polyamide, styrylpyridine resins, nitrile-terminated resins, addition-curable quinoxaline, and thermosetting resins such as addition-curable polyquinoxaline resin, lignin, hemicellulose
  • a thermosetting resin using a plant raw material such as cellulose may be included. When using the said thermosetting resin, it is preferable to use the hardening
  • the polylactic acid resin composition of the present invention may contain an antioxidant such as a hindered phenol or a phosphite compound, and a lubricant such as a hydrocarbon wax or an anionic surfactant.
  • the content of each of the antioxidant and the lubricant is preferably 0.05 to 3 parts by mass, more preferably 0.1 to 2 parts by mass with respect to 100 parts by mass of the polylactic acid resin.
  • the polylactic acid resin composition of the present invention may contain various antistatic agents, antifogging agents, light stabilizers, ultraviolet absorbers, pigments, colorants, antifungal agents, antibacterial agents, as necessary.
  • You may contain a foaming agent, a heat stabilizer, a weathering agent, a mold release agent, and a filler in the range which does not inhibit the desired effect which concerns on the objective of this invention.
  • a molded article molded using the polylactic acid resin composition can be obtained.
  • a molding method of the molded body for example, injection molding, injection / compression molding, extrusion molding, and mold molding can be used. It is preferable to promote crystallization during the manufacturing process or after molding because a molded body excellent in impact resistance and mechanical strength can be obtained. Examples of the method for promoting crystallization include a method using the crystal nucleating agent in the above range.
  • Such a molded body has high flame retardancy and heat resistance and is prevented from being deteriorated by bleeding, and is suitable for various parts such as electric, electronic, and automobiles.
  • Polylactic acid resin (A) Product name Terramac TE-4000N (melting point: 170 ° C) manufactured by Unitika Ltd.
  • Metal hydroxide (B) The following was used as the metal hydroxide (B).
  • Metal hydroxide 1 product name HP-350 (aluminum hydroxide, average particle size: 3.2 ⁇ m, composition: Al (OH) 3 (99.95%), SiO 2 (0.01 %), Fe 2 O 3 (0.01%), Na 2 O (0.03%, alkali metal substances))
  • Flame retardant (C) The following were used as the flame retardant (C).
  • Phosphorus compound 1 product name sps-100 manufactured by Otsuka Chemical Co., Ltd.
  • Reinforcing fiber (D) The following was used as the reinforcing fiber (D).
  • Glass fiber 1 Product name 03JAFT689S manufactured by Owens Corning Japan
  • Glass fiber 2 Product name 03JAFT762 manufactured by Owens Corning Japan
  • Glass fiber 3 Product name 03JATPB0160 manufactured by Owens Corning Japan
  • Glass fiber 4 Product name 03JAFT592 manufactured by Owens Corning Japan
  • the glass fiber 1 has a water content of 0.10% and is treated with a surface treatment agent mainly composed of a resin having a functional group having an epoxy group.
  • the glass fiber 2 has a moisture content of 0.07% and is treated with a surface treatment agent mainly composed of a polyolefin resin.
  • the glass fiber 3 has a water content of 0.13% and has been treated with a surface treatment agent mainly composed of a resin having a functional group having an epoxy group.
  • the glass fiber 4 has a water content of 0.15% and has been treated with a surface treatment agent mainly composed of a resin having a functional group having an epoxy group.
  • Hydrolysis-resistant inhibitor As the hydrolysis-resistant inhibitor, the following was used. Hydrolysis inhibitor 1: aromatic polycarbodiimide, polydiisopropylphenylcarbodiimide (trade name Stavaxol P) manufactured by Rhein Chemie
  • Fluorine-containing resin The following were used as the fluorine-containing resin.
  • Fluororesin 1 Polytetrafluoroethylene (trade name: Polyflon FA-500) manufactured by Daikin Industries, Ltd.
  • Crystal nucleating agent 1 The following were used as the crystal nucleating agent.
  • Crystal nucleating agent 1 Product name ITOWAX J-530 (N, N′-ethylene-bis-12-hydroxystearylamide) manufactured by Ito Oil Co., Ltd.
  • Plasticizer 1 Daihachi Chemical Co., Ltd. trade name DAIFATTY-101 (benzyl-2- (2-methoxyethoxy) ethyl adipate)
  • the obtained pellets were dried at 100 ° C. for 5 hours, and then an injection molding machine (manufactured by Toshiba Machine Co., Ltd., trade name EC20P-0.4A, molding temperature: 190 ° C., mold surface temperature: 80 ° C., in-mold holding time 30 ), A test piece (125 ⁇ 13 ⁇ 1.6 mm or 3.2 mm) is molded and crystallized (heated at 100 ° C. for 4 hours), and flame retardancy evaluation, bleed resistance evaluation, Fluidity evaluation, bending property evaluation, and Izod impact strength measurement were performed. For evaluation of bleed resistance, after determining the molding conditions, the surface of the mold was cleaned with MEK, and then the first and twelfth shot test pieces were used.
  • the flame retardancy evaluation was performed by leaving a test piece for flame retardancy evaluation (125 mm ⁇ 13 mm ⁇ 1.6 mm) obtained by injection molding in a temperature-controlled room at 23 ° C. and 50% humidity for 48 hours, and then underwriters. -Conducted in accordance with UL94 test (flammability test of plastic material for equipment parts) established by Laboratories.
  • UL94V is a method for evaluating the flame retardancy from the afterflame time and drip properties after indirect flame of a burner for 10 seconds on a test piece of a predetermined size held vertically, as shown in Table 1 below. Divided into classes.
  • the after-flame time is the length of time for which the test piece continues to burn with flame after the ignition source is moved away
  • t1 is the after-flame time after the first flame contact
  • t2 is 2
  • the after-flame time after the second flame contact, t3, is the after glow (flameless combustion) time after the second flame contact.
  • the second flame contact is performed by indirect flame for 10 seconds with a burner immediately after the first flame contact, after the flame has disappeared. Further, the ignition of cotton by the drip is determined by whether or not the labeling cotton that is about 300 mm below the lower end of the test piece is ignited by a drip from the test piece.
  • the results of Examples 1 and 2 indicate that the polylactic acid resin composition of the present invention has excellent flame retardancy and bleed resistance.
  • Comparative Example 1 in which 12 parts by mass of glass fiber 3 having an attached moisture content of 0.13% is added to 100 parts by mass of the polylactic acid resin, the flame resistance is good, but the bleed resistance is slightly inferior. It was.
  • Comparative Example 2 in which 12 parts by mass of glass fiber 4 having an attached water content of 0.15% was added to 100 parts by mass of polylactic acid resin, although flame retardancy was good, bleed resistance was inferior. . It can be seen that when the amount of moisture adhering to the reinforcing fiber is 0.1% or less, both flame retardancy and bleed resistance can be achieved.
  • Examples 1 and 2 were excellent in fluidity as compared with Comparative Examples 1 and 2.
  • the glass fibers added in Examples 1 and 2 are considered to have a low polarity due to the hydrophobic surface, and a good flowability due to a relatively large difference in polarity from the polylactic acid resin. .
  • the polylactic acid resin composition of the present invention has high flame retardancy and heat resistance, and further has excellent bleed resistance.
  • the use of the polylactic acid resin composition of the present invention is not particularly limited, and can be widely applied to, for example, household appliances, OA equipment housings, automobile parts, and the like.

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Abstract

L'invention concerne une composition de résine polylactique et un corps moulé en résine polylactique, qui en plus d'avoir un degré élevé de résistance à la chaleur et d'incombustibilité, présente également une résistance supérieure à l'exsudation. La composition de résine polylactique est caractérisée en ce qu'elle contient : une résine polylactique ; un hydroxyde métallique ; un agent ignifugeant ; et des fibres de renforcement dont la teneur en humidité adhérente est de 0,1 % ou moins.
PCT/JP2011/066216 2010-10-14 2011-07-15 Composition de résine polylactique et corps moulé en résine polylactique WO2012049896A1 (fr)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016060908A (ja) * 2014-09-12 2016-04-25 ハンファ トータル ペトロケミカルズ カンパニー リミテッド 難燃性ポリ乳酸樹脂組成物
US10961388B2 (en) 2015-12-04 2021-03-30 Nec Corporation Polylactic acid resin composition and polyester resin composition, and method for producing the same and molded body thereof

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