JP5298467B2 - Resin composition and molded article comprising the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin composition having excellent moldability, impact resistance and heat-resistance and a molded article made of the resin composition. <P>SOLUTION: The resin composition is produced by compounding (A) a polylactic acid resin, (B) a polyolefin resin and (C) a compatibilizing agent. The compatibilizing agent C is preferably at least one compound selected from (C-1) an ethylene/vinyl acetate copolymer, (C-2) an ethylene/(meth)acrylate copolymer, (C-3) a polyolefin resin having acid anhydride group, carboxyl group, amino group, imino group, alkoxysilyl group, silanol group, silyl ether group, hydroxyl group or epoxy group, (C-4) an acrylic resin or styrene resin having acid anhydride group, carboxyl group, amino group, imino group, alkoxysilyl group, silanol group, silyl ether group, hydroxyl group or epoxy group and (C-5) an ionomer resin. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

Description

  The present invention comprises (A) a polylactic acid resin, (B) a polyolefin resin, and (C) a compatibilizing agent, and is excellent in moldability, impact resistance and heat resistance. In addition, the present invention relates to a resin composition that is also excellent and a molded product comprising the same.

  Polylactic acid-based resin can be produced at low cost by the fermentation method using microorganisms such as corn as a raw material, and the melting point is as high as about 170 ° C. and can be melt-molded. Therefore, it is expected as a biopolymer that can replace resin produced from fossil raw materials such as petroleum.

  However, since the polylactic acid-based resin has a low crystallization rate, there is a limit to use it as a molded product after crystallization. For example, when polylactic acid resin is injection-molded, it not only requires a long molding cycle time and heat treatment after molding, but is also practical in terms of moldability and heat resistance, such as large deformation during molding and heat treatment. There was a big problem.

  On the other hand, a technique of blending a plurality of resins is widely known as a polymer alloy technique, and is widely used for the purpose of improving the defects of individual polymers.

  Patent Document 1 discloses a microbial-disintegrating thermoplastic resin composition in which a polyolefin resin is mixed and dispersed in a biodegradable thermoplastic resin, and a part of the polyolefin resin is a modified polyolefin resin. However, Patent Document 1 aims to control microbial disintegration, and there is no disclosure of properties such as moldability, impact resistance, and heat resistance, such as moldability, impact resistance, and heat resistance. There is no suggestion of a solution for obtaining a resin composition excellent in any of the properties.

  Patent Document 2 discloses a microbial disintegrating thermoplastic resin film obtained from a composition obtained by blending a compatibilizer with a mixed system of an aliphatic polyester and a polyolefin resin. However, Patent Document 2 is an invention about a film having high microbial disintegration property and heat fusion property, and there is no disclosure about properties such as heat resistance and moldability, and moldability, impact resistance, and heat resistance are not disclosed. There is no suggestion of a solution for obtaining a resin composition that is excellent in any of the above characteristics.

  Patent Document 3 discloses a polyolefin resin composition containing a polyolefin resin, a polylactic acid synthetic resin component, a vinyl acetate / ethylene copolymer, and the like. However, it is an invention aimed at stable productivity when processed into a sheet-like material, and there is no disclosure about heat resistance, and a resin composition that is excellent in all of properties such as moldability, impact resistance, and heat resistance There is no suggestion of a solution to get things.

  Patent Document 4 discloses a biodegradable blend resin obtained by blending a biodegradable resin and a polyolefin resin. However, Patent Document 4 is an invention for the purpose of having a high interlayer adhesion strength in a laminated film, and there is no disclosure about properties such as impact resistance and heat resistance, formability, impact resistance, There is no suggestion of a solution for obtaining a resin composition excellent in any of the characteristics such as heat resistance.

  Patent Document 5 discloses a biodegradable plastic material obtained by blending a biodegradable polymer, a polymer other than the biodegradable polymer, and a compatibilizer. However, in the invention of Patent Document 5, the effect of improving the heat resistance is insufficient, and a solution means for obtaining a resin composition having excellent properties such as moldability, impact resistance, and heat resistance is completely suggested. Absent.

  Patent Document 6 discloses a polylactic acid resin, a crystalline polypropylene resin composition in which the crystalline polypropylene resin contains a modified polypropylene resin, and a polylactic acid resin composition containing an inorganic filler. However, in the invention of Patent Document 6, although the heat resistance has a certain improvement effect, it is still insufficient, and furthermore, a resin composition excellent in all of the characteristics such as moldability, impact resistance, and heat resistance. There is no suggestion of a solution to obtain.

  Patent Document 7 discloses a thermoplastic resin molded article that includes a thermoplastic resin component derived from a fossil resource, a thermoplastic resin component derived from a biomass resource, and a thermoplastic resin component that is compatible or dispersible with both. However, in the invention of Patent Document 7, the effect of improving toughness and impact resistance is insufficient, and further, a solution for obtaining a resin composition that is excellent in all of properties such as moldability, impact resistance, and heat resistance. There is no suggestion of means.

  Patent Document 8 discloses a composition comprising a polyolefin, an aliphatic polyester biodegradable polymer, an acid or an epoxy group-containing polyolefin. However, in the invention of Patent Document 8, although the impact resistance and heat resistance are improved to some extent, they are still insufficient, and any of the characteristics such as moldability, impact resistance, heat resistance, etc. There is no suggestion of a solution for obtaining an excellent resin composition.

As described above, it is very difficult to obtain a resin composition that can satisfy all the properties such as moldability, impact resistance, and heat resistance by using any method, but it is practically used without any problem. There are many requests for materials that can be made, and further improvements have been demanded.
Japanese Patent Laid-Open No. 5-179110 (pages 2, 5, 6) JP-A-6-263892 (pages 2, 4, 5) JP 2003-301077 A (pages 2, 3 and 4) Japanese Patent Laying-Open No. 2005-68232 (pages 2, 3, 7-9) JP-A-2005-248160 (pages 2, 3, 10-12) Japanese Patent Laying-Open No. 2005-307128 (pages 2, 3, 10, 11) JP 2006-70210 (Pages 2, 3, 4) Japanese Unexamined Patent Publication No. 2006-77063 (Pages 2, 7-9)

  The present invention comprises (A) a polylactic acid resin, (B) a polyolefin resin, and (C) a compatibilizing agent, and is excellent in moldability, impact resistance, and heat resistance. It is another object of the present invention to provide a resin composition that is excellent also in the present invention and a molded product comprising the same.

  As a result of studying the above problems, the present inventors have formulated (C) a compatibilizing agent that satisfies specific requirements in addition to (A) polylactic acid-based resin and (B) polyolefin-based resin. The present inventors have found that the problem can be solved and have reached the present invention.

That is, the present invention
(1) The total amount of (A) and (B) is 100 parts by weight, and (A) 1 to 60 parts by weight of a polylactic acid resin, (B) 99 to 40 parts by weight of a polyolefin resin, and at least one selected from the following: A resin composition comprising 1 to 50 parts by weight of a seed (C) compatibilizer,
(C-4) Acrylic resin or styrene resin containing an epoxy group having an epoxy value of 1 to 7 meq / g, or an acid anhydride group, carboxyl group, amino group, imino group, alkoxysilyl group Acrylic resin or styrene resin (C-3) acid anhydride group, carboxyl group, amino group, imino group, containing at least one functional group selected from silanol group, silyl ether group, and hydroxyl group, A polyolefin-based resin containing at least one functional group selected from an alkoxysilyl group, a silanol group, a silyl ether group, a hydroxyl group and an epoxy group, which satisfies all of the following conditions (c-3-1) ) Vinyl acetate content or (meth) acrylic acid ester content is 3 to 45% by weight
(C-3-2) A melt flow rate at 190 ° C. and a load of 21.2N is 1 g / 10 min or more (C-1) an ethylene / vinyl acetate copolymer that satisfies all of the following conditions: (C-1-1) The vinyl acetate content is 25% by weight or more and less than 55% by weight (c-1-2) The melt flow rate at 190 ° C. and 21.2N load is 30 g / 10 min. The following (C-2) ethylene / (meth) acrylic acid ester copolymer satisfying one or more of the following conditions:
(C-2-1) (meth) acrylic acid ester content is 26% by weight or more
(C-2-2) Melt flow rate at 190 ° C. and 21.2N load condition is 8 g / 10 min or more. (2) (C) Compatibilizer is (C-1) ethylene / vinyl acetate copolymer At least one selected from the group consisting of one or more of a combination and the (C-3) acid anhydride group, carboxyl group, amino group, imino group, alkoxysilyl group, silanol group, silyl ether group, hydroxyl group and epoxy group The resin composition according to (1 ), wherein one or more polyolefin-based resins containing a functional group are used in combination.
(3) (C) Compatibilizer is (C-4) an acrylic resin or styrene resin containing an epoxy group and having an epoxy value of 1 to 7 meq / g, or an acid anhydride group, carboxyl Acrylic resin or styrene resin containing at least one functional group selected from a group, amino group, imino group, alkoxysilyl group, silanol group, silyl ether group, and hydroxyl group, and further improved impact resistance The resin composition according to (1), which is used in combination with an agent,
(4) The resin composition according to any one of (1) to (3) , further comprising a filler.
(5) The resin composition according to any one of (1) to (4) , further comprising a plasticizer.
(6) The resin composition according to any one of (1) to (5) , wherein the Izod impact strength is 55 J / m or more, and the deflection temperature under load at a load of 0.46 MPa is 85 ° C. or more.
(7) A molded article comprising the resin composition according to any one of (1) to (6) ,
It is.

  The resin composition of the present invention is excellent in moldability, impact resistance and heat resistance, and in a preferred embodiment, is excellent in transparency. A molded article made of this resin composition can be used for various applications such as automobile parts, electrical / electronic parts, and various daily goods by taking advantage of the above characteristics.

  The polylactic acid-based resin used in the present invention is a polymer containing L-lactic acid and / or D-lactic acid as a main constituent component, but may contain a copolymer component other than lactic acid. Examples of such other copolymer component units include polyvalent carboxylic acids, polyhydric alcohols, hydroxycarboxylic acids, lactones, and the like. Specifically, oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid , Azelaic acid, sebacic acid, dodecanedioic acid, fumaric acid, cyclohexanedicarboxylic acid, terephthalic acid, isophthalic acid, phthalic acid, 2,6-naphthalenedicarboxylic acid, anthracene dicarboxylic acid, 5-sodium sulfoisophthalic acid, 5-tetrabutyl Polycarboxylic acids such as phosphonium sulfoisophthalic acid, ethylene glycol, propylene glycol, butanediol, heptanediol, hexanediol, octanediol, nonanediol, decanediol, 1,4-cyclohexanedimethanol, neopentylglyco Glycerin, pentaerythritol, bisphenol A, aromatic polyhydric alcohol obtained by addition reaction of bisphenol with ethylene oxide, polyhydric alcohols such as diethylene glycol, triethylene glycol, polyethylene glycol, polypropylene glycol, polytetramethylene glycol, glycolic acid, Hydroxycarboxylic acids such as 3-hydroxybutyric acid, 4-hydroxybutyric acid, 4-hydroxyvaleric acid, 6-hydroxycaproic acid, hydroxybenzoic acid, and glycolide, ε-caprolactone glycolide, ε-caprolactone, β-propiolactone, δ -Units generated from lactones such as butyrolactone, β- or γ-butyrolactone, pivalolactone, and δ-valerolactone. Such a copolymerized unit usually preferably has a content of 0 to 30 mol%, preferably 0 to 10 mol%, when the total monomer units are 100 mol%.

  In the present invention, it is preferable to use a polylactic acid resin having a high optical purity of the lactic acid component from the viewpoint of heat resistance. That is, among the total lactic acid components of the polylactic acid-based resin, it is preferable that the L-form is contained at 80% or more, or the D-form is contained at 80% or more, the L-form is contained at 90% or more, or the D-form is 90% More preferably, the L-form is contained at 95% or more, or the D-form is contained at 95% or more, the L-form is contained at 98% or more, or the D-form is contained at 98% or more. Is most preferred. Moreover, the upper limit of the content of L-form or D-form is usually 100% or less.

  In addition, as the (A) polylactic acid-based resin of the present invention, it is preferable to use a polylactic acid stereocomplex in terms of heat resistance and moldability. As a method for forming a polylactic acid stereocomplex, for example, L-form is 90% or more, and in terms of heat resistance, preferably 95%, more preferably 98% or more poly-L-lactic acid, and D-form is 90%. As mentioned above, from the viewpoint of heat resistance, a method of mixing 95%, more preferably 98% or more of poly-D-lactic acid using a technique such as melt kneading or solution mixing can be mentioned. As a method, a method of forming a block copolymer composed of a poly-L-lactic acid segment and a poly-D-lactic acid segment can also be mentioned, and poly-L can be easily formed from a polylactic acid stereocomplex. A method of forming a block copolymer comprising a lactic acid segment and a poly-D-lactic acid segment is preferred. In the present invention, the polylactic acid stereocomplex may be used alone, or the polylactic acid stereocomplex and poly-L-lactic acid or poly-D-lactic acid may be used in combination.

  As a method for producing the polylactic acid-based resin, a known polymerization method can be used, and a direct polymerization method from lactic acid, a ring-opening polymerization method via lactide, or the like can be used.

  The molecular weight and molecular weight distribution of the polylactic acid resin are not particularly limited as long as it can be substantially molded, but it is easy to control the phase structure and is improved in terms of impact resistance. The average molecular weight is preferably 10,000 or more, more preferably 50,000 or more, still more preferably 100,000 or more, and particularly preferably 200,000 or more. The upper limit is not particularly limited, but is preferably 800,000 or less, more preferably 600,000 or less, and more preferably 400,000 or less. The weight average molecular weight herein is a weight average molecular weight in terms of polymethyl methacrylate (PMMA) measured by gel permeation chromatography (GPC) using hexafluoroisopropanol as a solvent.

  In the present invention, the melting point of the polylactic acid resin is not particularly limited, but is preferably 120 ° C. or higher, and more preferably 150 ° C. or higher.

  In the present invention, the polyolefin resin is ethylene, propylene, 1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene, 1-heptene, 1-octene, 1-decene, 1-dodecene, An unmodified olefin resin obtained by polymerization or copolymerization of olefins such as olefins such as 1-tetradecene, 1-hexadecene, 1-octadecene and the like, vinyl alcohol or derivatives thereof, and unsaturated carboxylic acid or It does not include modified polyolefin resins modified with such derivatives and compounds such as carboxylic acid vinyl esters.

  Specific examples include polyethylene resins, polypropylene resins, poly 1-butene resins, poly 1-pentene resins, poly 4-methyl-1-pentene resins and other homopolymers, ethylene / α-olefin copolymers, or these Non-conjugated diene monomers such as 1,4-hexadiene, dicyclopentadiene, 2,5-norbornadiene, 5-ethylidene norbornene, 5-ethyl-2,5-norbornadiene, 5- (1'-propenyl) -2-norbornene And a copolymer obtained by copolymerizing one or more of the above.

  The ethylene / α-olefin copolymer in the present invention is a copolymer of ethylene and at least one kind of α-olefin having 3 or more carbon atoms, preferably 3 to 20 carbon atoms. Specific examples of 20 α-olefins include propylene, 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 1-nonene, 1-decene, 1-undecene, 1-dodecene, 1-tridecene, 1-tetradecene, 1-pentadecene, 1-hexadecene, 1-heptadecene, 1-octadecene, 1-nonadecene, 1-eicosene, 3-methyl-1-butene, 3-methyl-1-pentene, 3- Ethyl-1-pentene, 4-methyl-1-pentene, 4-methyl-1-hexene, 4,4-dimethyl-1-hexene, 4,4-dimethyl-1- Pentene, 4-ethyl-1-hexene, 3-ethyl-1-hexene, 9-methyl-1-decene, 11-methyl-1-dodecene, and 12-ethyl-1-tetradecene and combinations thereof. Among these α-olefins, a copolymer using an α-olefin having 3 to 12 carbon atoms is preferable from the viewpoint of improving mechanical strength. This ethylene / α-olefin copolymer preferably has an α-olefin content of 1 to 30 mol%, more preferably 2 to 25 mol%, and still more preferably 3 to 20 mol%.

  In the present invention, a polyethylene resin, a polypropylene resin, and a poly-4-methyl-1-pentene resin are preferable from the viewpoint that the phase structure is easily controlled and the heat resistance or impact resistance is improved. Polypropylene resin is more preferable, and polyethylene resin is more preferable from the viewpoint of toughness.

  In the present invention, the method for producing a polyolefin resin is not particularly limited, and a known method can be used. For example, in a polyolefin resin, radical polymerization, coordination polymerization using a Ziegler-Natta catalyst, Any method such as anionic polymerization or coordination polymerization using a metallocene catalyst can be used.

  In the present invention, when the polyolefin-based resin is a polypropylene resin, it is preferable to use a polypropylene resin with high stereoregularity. When a polypropylene resin with high isotacticity is used, a resin composition having excellent moldability and heat resistance. When a high syndiotactic polypropylene resin is used, a resin composition excellent in impact resistance and transparency can be obtained. As stereoregularity, isotacticity or syndiotacticity is preferably 80% or more, more preferably 90% or more, and still more preferably 95% or more. Syndiotacticity here refers to deuterated o-dichlorobenzene as a solvent and is observed as syndiotacticity, heterotacticity, and isotacticity in 13C-NMR measurement at 110 ° C. This is a value that can be calculated by expressing the percentage of the integrated intensity of each peak as a percentage, with the total integrated intensity of the peaks of the straight chain branched methyl groups of 20.2 ppm, 20.8 ppm, and 21.5 ppm as 100%.

  In the present invention, polypropylene resins having different stereoregularities may be used in combination. For example, it is preferable to use two or more types of polypropylene resins having isotacticity as the main structure, because it is easy to obtain a resin composition excellent in fluidity, moldability, and heat resistance, and a high isotacticity polypropylene resin is preferable. It is preferable to use one or more high syndiotactic polypropylene resins because a resin composition excellent in moldability, heat resistance and impact resistance can be easily obtained.

  In the present invention, a high isotacticity polypropylene resin is easily obtained by coordination polymerization using a Ziegler-Natta catalyst as a catalyst, and a high syndiotactic polypropylene resin is a coordination polymerization using a metallocene catalyst as a catalyst. It is easy to obtain by.

  In the present invention, when the (B) polyolefin resin is a polypropylene resin, the melt flow rate (MFR) is 1 to 100 g / 10 min in that it is excellent in moldability, impact resistance, heat resistance, and the like. Is preferably 10 to 60 g / 10 min, more preferably 20 to 50 g / 10 min.

In the present invention, the (C) compatibilizer is at least one selected from the following.
(C-1) ethylene / vinyl acetate copolymer (C-2) ethylene / (meth) acrylic acid ester copolymer (C-3) acid anhydride group, carboxyl group, amino group, imino group, alkoxysilyl group , Polyolefin-based resin (C-4) containing at least one functional group selected from silanol group, silyl ether group, hydroxyl group and epoxy group, carboxyl group, amino group, imino group, alkoxysilyl Acrylic resin or styrene resin (C-5) ionomer resin containing at least one functional group selected from a group, a silanol group, a silyl ether group, a hydroxyl group and an epoxy group.

In the present invention, when the (C) compatibilizer is (C-1) an ethylene / vinyl acetate copolymer, it preferably satisfies one or more of the following conditions, and satisfies any of the conditions: More preferably.
(C-1-1) Vinyl acetate content is 25% by weight or more and less than 55% by weight (c-1-2) Melt flow rate at 190 ° C. and 21.2N load condition is 30 g / 10 min or less .

  The (C-1) ethylene / vinyl acetate copolymer used in the present invention has a vinyl acetate content in the range of 28 wt% to 50 wt% in terms of moldability, impact resistance and heat resistance. Is preferred, more preferably 30% to 45% by weight, and still more preferably 34% to 41% by weight. Here, the vinyl acetate content is a value measured according to JIS K 7192.

  The (C-1) ethylene / vinyl acetate copolymer used in the present invention has a melt flow rate under the condition of 190 ° C. and 21.2 N load in terms of moldability, impact resistance, heat resistance and fluidity, It is preferably 1 to 20 g / 10 minutes, and more preferably 2 to 10 g / 10 minutes. Here, the melt flow rate is a value measured according to JIS K 7210.

  In the present invention, the ethylene / vinyl acetate copolymer containing an acid or an epoxy group is not included in the (C-1) ethylene / vinyl acetate copolymer, and will be described later as (C-3) an acid or epoxy. Included in group-containing polyolefin resin.

  Examples of (C-1) ethylene / vinyl acetate copolymer products that can be used in the present invention include “Evaflex” manufactured by Mitsui DuPont Polychemical, “Revaprene” manufactured by LANXESS, and “Evatate” manufactured by Sumitomo Chemical Co., Ltd. , Tosoh “Ultrasen”, Nippon Polyethylene “Novatech” EVA, Nihon Unicar “NUC EVA Copolymer” and the like.

In the present invention, when the (C) compatibilizer is (C-2) an ethylene / (meth) acrylic acid ester copolymer, it preferably satisfies one or more of the following conditions, It is more preferable that the above condition is also satisfied.
(C-2-1) (meth) acrylic acid ester content is 26% by weight or more (c-2-1) Melt flow rate at 190 ° C. and 21.2N load condition is 8 g / 10 min or more.

  The (C-2) ethylene / (meth) acrylate copolymer used in the present invention has a (meth) acrylate content of 26% by weight or more in terms of moldability, impact resistance and heat resistance. It is preferably 30% by weight or more, more preferably in the range of 30% by weight to 50% by weight. Here, the (meth) acrylic acid ester content is determined by measuring the FT-IR spectrum of the (C-2) ethylene / (meth) acrylic acid ester copolymer whose content is known in advance. This is a value obtained from a calibration curve by preparing a calibration curve and measuring the FT-IR spectrum of the (C-2) ethylene / (meth) acrylic acid ester copolymer.

  The (C-2) ethylene / (meth) acrylic acid ester copolymer used in the present invention is a melt under the conditions of 190 ° C. and 21.2 N load in terms of moldability, impact resistance, heat resistance and fluidity. The flow rate is preferably 10 to 1000 g / 10 minutes, and more preferably 30 to 500 g / 10 minutes. Here, the melt flow rate is a value measured according to JIS K 7210.

  In the present invention, it contains at least one functional group selected from an acid anhydride group, carboxyl group, amino group, imino group, alkoxysilyl group, silanol group, silyl ether group, hydroxyl group and epoxy group. The ethylene / (meth) acrylic acid ester copolymer is not included in the (C-2) ethylene / (meth) acrylic acid ester copolymer, and the (C-3) acid anhydride group, carboxyl group, amino described later. It is included in a polyolefin resin containing at least one functional group selected from a group, an imino group, an alkoxysilyl group, a silanol group, a silyl ether group, a hydroxyl group and an epoxy group.

  Examples of (C-2) ethylene / (meth) acrylic acid ester copolymers that can be used in the present invention include “Lotril” manufactured by Arkema, “Evaflex EEA” manufactured by Mitsui DuPont Polychemical, Sumitomo Chemical “Aklift” manufactured by Kogyo, Nihon Unicar “NUC EEA Copolymer” and the like can be mentioned.

In the present invention, the (C) compatibilizer is selected from (C-3) an acid anhydride group, carboxyl group, amino group, imino group, alkoxysilyl group, silanol group, silyl ether group, hydroxyl group and epoxy group. In the case of a polyolefin-based resin containing at least one functional group, it preferably satisfies one or more of the following conditions, and more preferably satisfies any of the following conditions. In the present invention, at least one functional group selected from an acid anhydride group, an amino group, an imino group and an epoxy group is used in that the moldability, heat resistance, impact resistance and surface peel resistance are excellent. The polyolefin resin is preferably a polyolefin resin containing at least one functional group selected from an acid anhydride group and an epoxy group.
(C-3-1) Vinyl acetate content or (meth) acrylic acid ester content is 3 to 45% by weight
(C-3-2) Melt flow rate at 190 ° C. and 21.2N load condition is 1 g / 10 min or more.

  (C-3) at least one functional group selected from (C-3) acid anhydride group, carboxyl group, amino group, imino group, alkoxysilyl group, silanol group, silyl ether group, hydroxyl group and epoxy group used in the present invention The polyolefin resin to be contained has a vinyl acetate content or (meth) acrylic acid ester content in the range of 15 to 40% by weight in terms of moldability, impact resistance and heat resistance. Is more preferable, 25% to 40% by weight is more preferable, and 30% to 40% by weight is further preferable. Here, the vinyl acetate content is a value measured according to JIS K 7192, and the (meth) acrylic acid ester content contains a (meth) acrylic acid ester whose contents are known in advance (C- 3) FT-IR spectrum of acid or epoxy group-containing polyolefin resin is measured to create a calibration curve for each content, and (C-3) acid or epoxy group-containing polyolefin system containing (meth) acrylic acid ester It is a value obtained from a calibration curve by measuring the FT-IR spectrum of the resin.

  (C-3) at least one functional group selected from (C-3) acid anhydride group, carboxyl group, amino group, imino group, alkoxysilyl group, silanol group, silyl ether group, hydroxyl group and epoxy group used in the present invention The polyolefin resin to be contained has a melt flow rate in the range of 1 to 300 g / 10 min at 190 ° C. and 21.2 N load in terms of moldability, impact resistance, heat resistance and fluidity. Is preferable, it is more preferable that it is 2-50 g / 10min, and it is further more preferable that it is 5-30 g / 10min. Here, the melt flow rate is a value measured according to JIS K 7210.

  (C-3) at least one selected from acid anhydride group, carboxyl group, amino group, imino group, alkoxysilyl group, silanol group, silyl ether group, hydroxyl group and epoxy group that can be used in the present invention Examples of polyolefin-based resins containing functional groups include “Bond First” manufactured by Sumitomo Chemical, “Lex Pearl” manufactured by Nippon Polyethylene, “Toughmer” manufactured by Mitsui Chemicals, “Modiper” manufactured by Nippon Oil and Fats, and “Modyper” manufactured by Sanyo Chemical Industries Umex ”, Arkema“ Orevac ”, Arkema“ Rotada ”, Arkema“ Bondyne ”, Arkema“ Evadine ”, Mitsui DuPont Polychemical“ Nucleel ”, Dow Chemical“ Primacol ”, etc. Can do.

  In the present invention, (C) the compatibilizing agent is selected from (C-4) acid anhydride group, carboxyl group, amino group, imino group, alkoxysilyl group, silanol group, silyl ether group, hydroxyl group and epoxy group. In the case of an acrylic resin or styrene resin containing at least one functional group, from the point of impact resistance, heat resistance and durability, from an acid anhydride group, amino group, imino group and epoxy group It is preferably an acrylic resin or styrene resin containing at least one selected functional group, and an acrylic resin or styrene containing at least one functional group selected from an acid anhydride group and an epoxy group More preferably, it is an epoxy group-containing acrylic resin or styrene resin. And it has a weight-average molecular weight of a polymer of 1000 to 300,000. Here, the weight average molecular weight is a polymethyl methacrylate (PMMA) conversion weight average molecular weight measured by gel permeation chromatography (GPC) using hexafluoroisopropanol as a solvent.

  (C-4) at least one functional group selected from (C-4) acid anhydride group, carboxyl group, amino group, imino group, alkoxysilyl group, silanol group, silyl ether group, hydroxyl group and epoxy group used in the present invention. The acrylic resin or styrene resin to be contained contains a (meth) acrylic ester vinyl unit or a styrene vinyl unit, preferably a (meth) acrylic ester vinyl unit or a styrene vinyl unit. Component, more preferably 60 wt% or more, more preferably 80 wt% or more, and other vinyl monomer component units excluding olefin monomers are preferably 40 wt% or less, more preferably May be a copolymer copolymerized with 20% by weight or less. In the present invention, the component (C-4) is at least one selected from an acid anhydride group, carboxyl group, amino group, imino group, alkoxysilyl group, silanol group, silyl ether group, hydroxyl group and epoxy group. In the case of a styrenic resin containing a kind of functional group, it is sufficient that the styrenic vinyl unit is contained even a little in that the balance of impact resistance, heat resistance, toughness and surface peel resistance is particularly excellent. It is preferably 1 to 30% by weight, and more preferably 5 to 15% by weight.

  In the present invention, specific examples of the raw material monomer for forming the (meth) acrylic ester vinyl unit are methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, propyl acrylate, propyl methacrylate, and acrylic acid n. -Butyl, n-butyl methacrylate, isobutyl acrylate, isobutyl methacrylate, t-butyl acrylate, t-butyl methacrylate, 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate, cyclohexyl acrylate, cyclohexyl methacrylate, acrylic Isobornyl acid, isobornyl methacrylate, lauryl acrylate, lauryl methacrylate, stearyl acrylate, stearyl methacrylate, hydroxyethyl acrylate, hydroxyethyl methacrylate, acrylic acid Droxypropyl, hydroxypropyl methacrylate, polyethylene glycol or polypropylene glycol acrylic ester or methacrylic ester, trimethoxysilylpropyl acrylate, trimethoxysilylpropyl methacrylate, methyldimethoxysilylpropyl acrylate, methyldimethoxysilylpropyl methacrylate , Α-hydroxymethyl acrylate, dimethylaminoethyl acrylate, dimethylaminoethyl acrylate, and the like. In terms of durability, methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, propyl acrylate, propyl methacrylate, N-butyl crylate, n-butyl methacrylate, isobutyl acrylate, isobutyl methacrylate, t-butyl acrylate, t-butyl methacrylate, 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate, cyclohexyl acrylate, methacrylic acid Preferred are cyclohexyl acid, isobornyl acrylate, isobornyl methacrylate, acrylonitrile, methacrylonitrile, and further methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, n-butyl acrylate, n-butyl methacrylate, acrylic 2-ethylhexyl acid, 2-ethylhexyl methacrylate, acrylonitrile and methacrylonitrile are preferable, and methyl methacrylate is more preferable in terms of heat resistance. These may be used alone or in combination of two or more.

  In the present invention, specific examples of the raw material monomer for forming the styrene-based vinyl unit include styrene, α-methylstyrene, p-methylstyrene, α-methyl-p-methylstyrene, p-methoxystyrene, o-methoxystyrene, 2,4-dimethylstyrene, 1-vinylnaphthalene, chlorostyrene, bromostyrene, divinylbenzene, vinyltoluene and the like can be mentioned. Among them, styrene and α-methylstyrene are preferably used. These may be used alone or in combination of two or more.

  In the present invention, (C-4) at least one functional group selected from an acid anhydride group, carboxyl group, amino group, imino group, alkoxysilyl group, silanol group, silyl ether group, hydroxyl group and epoxy group Specific examples of the raw material monomer that forms the epoxy group-containing vinyl unit that is a constituent component unit of the acrylic resin or styrene resin to be contained include unsaturated mono- acrylates such as glycidyl (meth) acrylate and glycidyl p-styrylcarboxylate. Monoglycidyl ester of unsaturated polycarboxylic acid such as glycidyl ester of carboxylic acid, maleic acid, itaconic acid or unsaturated glycidyl ether such as polyglycidyl ester, allyl glycidyl ether, 2-methylallyl glycidyl ether, styrene-4-glycidyl ether etc It is below. Among these, glycidyl acrylate or glycidyl methacrylate is preferably used in terms of radical polymerizability. These can be used alone or in combination of two or more.

  In the present invention, (C-4) at least one functional group selected from an acid anhydride group, carboxyl group, amino group, imino group, alkoxysilyl group, silanol group, silyl ether group, hydroxyl group and epoxy group Specific examples of the raw material monomer that forms an acid anhydride group-containing vinyl-based unit that is a constituent unit of the acrylic resin or styrene-based resin include maleic anhydride, itaconic anhydride, citraconic anhydride, or aconite Examples of the acid anhydride include maleic anhydride. These may be used alone or in combination of two or more.

  In addition, examples of the raw material monomer that forms the unsaturated dicarboxylic acid unit serving as the carboxyl group-containing unit include maleic acid, maleic acid monoethyl ester, itaconic acid, and phthalic acid. Among these, maleic acid and itaconic acid are preferably used. Is done. These may be used alone or in combination of two or more.

  In the present invention, (C-4) at least one functional group selected from an acid anhydride group, carboxyl group, amino group, imino group, alkoxysilyl group, silanol group, silyl ether group, hydroxyl group and epoxy group The melt flow rate (MFR) of the acrylic resin or styrene resin to be contained is preferably 1 to 30 g / 10 minutes from the viewpoint of excellent impact resistance, heat resistance, toughness and surface peel resistance. It is more preferably ˜15 g / 10 minutes, and further preferably 3 to 13 g / 10 minutes.

  In the present invention, (C-4) at least one functional group selected from an acid anhydride group, carboxyl group, amino group, imino group, alkoxysilyl group, silanol group, silyl ether group, hydroxyl group and epoxy group When the acrylic resin or styrene resin to be contained is an epoxy group-containing acrylic resin or styrene resin, the epoxy value is in the range of 0.1 to 10 meq / g in terms of impact resistance, heat resistance and durability. Preferably in the range of 1 to 7 meq / g, more preferably in the range of 2 to 4.5 meq / g, and particularly preferably in the range of 2.5 to 4 meq / g. preferable. Using an epoxy with an epoxy value of 0.1 meq / g or more will have a sufficient effect of improving heat resistance, and using an epoxy with an epoxy value of 10 meq / g or less will reduce moldability due to gelation or the like. This is preferable because there is not. Here, the epoxy value is a value measured by a hydrochloric acid-dioxane method. In addition, the epoxy value of the polymer containing a glycidyl group-containing vinyl-based unit can be adjusted by adjusting the content of the glycidyl group-containing vinyl-based unit.

In the present invention, (C-4) at least one functional group selected from an acid anhydride group, carboxyl group, amino group, imino group, alkoxysilyl group, silanol group, silyl ether group, hydroxyl group and epoxy group The glass transition temperature of the acrylic resin or styrene resin to be contained is not particularly limited, but is preferably in the range of 30 to 100 ° C., and in the range of 40 to 70 ° C. in terms of excellent handling properties. More preferably, it is the range of 50-65 degreeC. The glass transition temperature here is a value measured by DSC according to the method described in JIS K7121, and is the midpoint glass transition temperature when the temperature is raised at 20 ° C./min. (C-4) Contains at least one functional group selected from an acid anhydride group, carboxyl group, amino group, imino group, alkoxysilyl group, silanol group, silyl ether group, hydroxyl group and epoxy group. The glass transition temperature of the acrylic resin or styrene resin can be controlled by adjusting the composition of the copolymer component. The glass transition temperature can usually be increased by copolymerizing aromatic vinyl units such as styrene, and can be decreased by copolymerizing (meth) acrylic ester vinyl units such as butyl acrylate. In the present invention, the polymer containing a glycidyl group-containing vinyl-based unit usually contains a volatile component because unreacted raw material monomers and solvents remain. The amount of the non-volatile component that is the balance is not particularly limited, but it is preferable that the non-volatile component amount is large from the viewpoint of suppressing the generation of gas. Specifically, it is preferably 95% by weight or more, more preferably 97% by weight or more, further preferably 98% by weight or more, and most preferably 98.5% by weight or more. preferable. In addition, the non-volatile component here represents the remaining amount ratio when the sample 10g is heated at 110 degreeC for 1 hour in nitrogen atmosphere.

  In the present invention, (C-4) at least one functional group selected from an acid anhydride group, carboxyl group, amino group, imino group, alkoxysilyl group, silanol group, silyl ether group, hydroxyl group and epoxy group The acrylic resin or styrene resin to be contained may use a sulfur compound as a chain transfer agent (molecular weight modifier) in order to obtain a low molecular weight product. In that case, the polymer usually contains sulfur. Here, although sulfur content is not specifically limited, From the viewpoint of suppressing unpleasant odor, it is preferable that the sulfur content is small. Specifically, the sulfur atom is preferably 1000 ppm or less, more preferably 100 ppm or less, further preferably 10 ppm or less, and most preferably 1 ppm or less.

  In the present invention, (C-4) at least one functional group selected from an acid anhydride group, carboxyl group, amino group, imino group, alkoxysilyl group, silanol group, silyl ether group, hydroxyl group and epoxy group The method for producing the acrylic resin or styrene resin to be contained is not particularly limited as long as the conditions specified in the present invention are satisfied. Known polymerization methods such as bulk polymerization, solution polymerization, suspension polymerization, and emulsion polymerization Can be used. When using these methods, a polymerization initiator, a chain transfer agent, a solvent, and the like may be used. These are finally obtained (C-4) acid anhydride groups, carboxyl groups, amino groups, It may remain as an impurity in an acrylic resin or styrene resin containing at least one functional group selected from an imino group, alkoxysilyl group, silanol group, silyl ether group, hydroxyl group and epoxy group. The amount of these impurities is not particularly limited, but it is preferable that the amount of impurities is small from the viewpoint of suppressing a decrease in heat resistance and weather resistance. Specifically, the amount of impurities is preferably 10% by weight or less, more preferably 5% by weight or less, further preferably 3% by weight or less, particularly 1% by weight or less, with respect to the finally obtained polymer. Most preferred.

  (C-4) acid anhydride group, carboxyl group, amino group, imino group, alkoxysilyl group, silanol group satisfying the above molecular weight, glass transition temperature, nonvolatile component amount, sulfur content, impurity amount, etc. As a method for producing an acrylic resin or styrene resin containing at least one functional group selected from a silyl ether group, a hydroxyl group and an epoxy group, a high temperature of 150 ° C. or higher and pressure conditions (preferably The method of continuous bulk polymerization in a short time (preferably 5 to 30 minutes) in 1 MPa or more does not use a polymerization initiator, a chain transfer agent, or a solvent that causes a high polymerization rate, impurities or sulfur content. More preferable in terms.

  (C-4) At least one selected from an acid anhydride group, carboxyl group, amino group, imino group, alkoxysilyl group, silanol group, silyl ether group, hydroxyl group and epoxy group that can be used in the present invention Examples of the product of acrylic resin or styrene resin containing a functional group include “ARUFON” manufactured by Toagosei Co., Ltd. and “JONCRYL” manufactured by Johnson Polymer.

In the present invention, when the (C) compatibilizer is (C-5) an ionomer resin, it should satisfy at least one of the following conditions from the viewpoint of impact resistance, heat resistance and durability. Is preferred.
(C-5-1) The metal ion species is any one selected from sodium, magnesium, calcium and zinc (c-5-2) The melt flow rate under the condition of 190 ° C. and 21.2 N load is 0. 5g / 10 min or more.

  As the (C-5) ionomer resin used in the present invention, the metal species is preferably any one selected from calcium and zinc in terms of moldability, impact resistance and heat resistance, and is zinc. It is more preferable.

  The (C-5) ionomer resin used in the present invention has a melt flow rate of 1 to 1000 g / 10 2 at 190 ° C. and 21.2 N load in terms of moldability, impact resistance, heat resistance and fluidity. It is preferable that it is the range of minutes, It is more preferable that it is 5-100 g / 10min, It is further more preferable that it is 10-30 g / 10min. Here, the melt flow rate is a value measured according to JIS K 7210.

  Examples of (C-5) ionomer resins that can be used in the present invention include “High Milan” manufactured by Mitsui DuPont Polychemical, “ACLYN” manufactured by Honeywell, and the like.

  In the present invention, by blending the (C) compatibilizer, the affinity between the (A) polylactic acid resin and the (B) polyolefin resin is improved, and the phase structure is easily controlled. A resin composition that is excellent in impact resistance and heat resistance, and in a preferred embodiment, is also excellent in transparency.

  In the present invention, it is preferable to use two or more kinds as a compatibilizing agent (C) in combination because the phase structure is particularly easily controlled and excellent in impact resistance and heat resistance. Among these, (C-1) one or more of ethylene / vinyl acetate copolymer and (C-3) acid anhydride group, carboxyl group, amino group in that they are excellent in impact resistance, heat resistance and surface peel resistance. More preferably, one or more polyolefin-based resins containing at least one functional group selected from a group, an imino group, an alkoxysilyl group, a silanol group, a silyl ether group, a hydroxyl group and an epoxy group are blended together, (C-1) one or more of ethylene / vinyl acetate copolymer and (C-3) acid anhydride group, carboxyl group, amino group, imino group, alkoxysilyl group, silanol group, silyl ether group, hydroxyl group and More preferably, two or more polyolefin resins containing at least one functional group selected from epoxy groups are used in combination. .

  In the present invention, the blending ratio of (A) polylactic acid resin and (B) polyolefin resin is not particularly limited, but the total amount of (A) polylactic acid resin and (B) polyolefin resin is 100 parts by weight. The (A) polylactic acid resin is 1 to 99 parts by weight, preferably 1 to 80 parts by weight, and 1 to 60 parts by weight from the viewpoints of moldability, heat resistance, durability and chemical resistance. More preferably, 1 to 40 parts by weight is further preferred, and (B) polyolefin-based resin is 99 to 1 part by weight, from the viewpoint of moldability, impact resistance, heat resistance, durability and chemical resistance, 99 to 20 parts by weight is preferred, 99 to 40 parts by weight is more preferred, and 99 to 60 parts by weight is even more preferred.

  In the present invention, the blending amount of the (C) compatibilizing agent is not particularly limited, but the moldability and impact resistance with respect to 100 parts by weight of the total amount of (A) polylactic acid resin and (B) polyolefin resin. From the viewpoints of heat resistance and fluidity, 0.01 to 100 parts by weight is preferred, 1 to 50 parts by weight is more preferred, and 5 to 30 parts by weight is even more preferred. In the present invention, (C) as a compatibilizer, (C-1) one or more of ethylene / vinyl acetate copolymer and (C-3 acid anhydride group, carboxyl group, amino group, imino group, alkoxysilyl group In the case where one or more polyolefin resins containing at least one functional group selected from silanol group, silyl ether group, hydroxyl group and epoxy group are used in combination, (C-1) ethylene / vinyl acetate The blending amount of the polymer is preferably 0.01 to 25 parts by weight, more preferably 1 to 20 parts by weight, still more preferably 2 to 15 parts by weight, (C-3) an acid anhydride group, a carboxyl group, and an amino group. A polyolefin containing at least one functional group selected from: an imino group, an alkoxysilyl group, a silanol group, a silyl ether group, a hydroxyl group and an epoxy group The amount of emissions based resin is preferably 0.01 to 40 parts by weight, more preferably 1 to 30 parts by weight, more preferably 2 to 20 parts by weight.

  In the present invention, as the phase structure of the resin composition, a phase structure in which either (A) a polylactic acid resin or (B) a polyolefin resin is a dispersed phase and the other is a continuous phase (matrix phase). However, from the viewpoint of heat resistance, moldability, durability, and chemical resistance, it is preferable that (A) the polylactic acid-based resin forms a dispersed phase and (B) the polyolefin-based resin forms a continuous phase. Furthermore, from the viewpoints of moldability, impact resistance, heat resistance, transparency and appearance, the average particle size of the dispersed phase is preferably 1 μm or less, more preferably 700 nm or less, further preferably 500 nm or less, particularly preferably 100 nm or less. 70 nm or less is most preferable. This phase structure can be confirmed by observation using a scanning electron microscope (SEM) or transmission electron microscope (TEM). In the present invention, the phase structure is confirmed at a magnification of 10,000 times using a TEM. It is preferable to do. In addition, as a method of observing the phase structure with an electron microscope, in order to clearly observe the phase structure, it is possible to perform pretreatment using various known methods such as an ultrathin section method, an ion etching method, and an electron staining method. Good.

  In the present invention, the resin composition having such a phase structure is selected from (A) a polylactic acid resin, (B) a polyolefin resin, and (C) a compatibilizer, each having a preferable structure and characteristics. Can be obtained by blending.

  In the present invention, fillers, plasticizers, carboxyl group-reactive compounds, stabilizers (antioxidants, ultraviolet absorbers, etc.), lubricants, mold release agents, flame retardants, and dyes are within the scope of the present invention. In addition, a coloring agent including a pigment, a crystal nucleating agent, an antistatic agent, and other thermoplastic resins can be added.

  In this invention, it is preferable to mix | blend a filler from the point that the resin composition excellent in mechanical characteristics, a moldability, heat resistance, etc. is obtained. As the filler, there can be used those in the form of fibers, plates, granules, and powders that are usually used as fillers for thermoplastic resins. Specifically, glass fiber, carbon fiber, graphite fiber, metal fiber, potassium titanate whisker, aluminum borate whisker, magnesium-based whisker, silicon-based whisker, wollastonite, sepiolite, asbestos, slag fiber, zonolite, elastadite, Fibrous inorganic fillers such as gypsum fiber, silica fiber, alumina fiber, zirconia fiber, boron nitride fiber, silicon nitride fiber and boron fiber, glass flake, non-swellable mica, graphite, metal foil, ceramic beads, talc, clay, Mica, sericite, zeolite, bentonite, dolomite, kaolin, fine silicic acid, feldspar powder, potassium titanate, shirasu balloon, calcium carbonate, magnesium carbonate, barium sulfate, calcium oxide, aluminum oxide, titanium oxide, Plate-like and granular inorganic fillers such as aluminum oxalate, silicon oxide, gypsum, novaculite, dosonite and clay, polyester fiber, nylon fiber, acrylic fiber, cotton fiber, hemp fiber, bamboo fiber, wood fiber, kenaf fiber, jute Fiber, banana fiber, coconut fiber, animal fiber such as silk, wool, Angola, cashmere or camel, paper powder, wood powder, bamboo powder, cellulose powder, rice husk powder, fruit shell powder, chitin powder, chitosan powder, protein, starch , Organic fillers in the form of fibers, powders or chips, such as rice husks, wood chips, okara, waste paper grinds, clothing grinds. Among these fillers, fibrous inorganic fillers, plate-like inorganic fillers, and organic fillers are preferable. In particular, glass fiber, wollastonite, aluminum borate whisker, potassium titanate whisker, talc, mica, kaolin. Hemp fiber, bamboo fiber, kenaf fiber, jute fiber, paper powder and wood powder are preferred. The aspect ratio of the fibrous filler is preferably 5 or more, more preferably 10 or more, and further preferably 20 or more. These fillers can be used alone or in combination of two or more. The filler may be coated or focused with a thermoplastic resin such as an ethylene / vinyl acetate copolymer, or a thermosetting resin such as an epoxy resin, and may be a coupling agent such as aminosilane or epoxysilane. It may be processed.

  In the present invention, the blending amount of the filler is preferably 1 to 300 parts by weight, more preferably 5 to 150 parts by weight with respect to 100 parts by weight of the total amount of (A) polylactic acid resin and (B) polyolefin resin. preferable.

  In the present invention, it is preferable to blend a plasticizer from the viewpoint that a resin composition excellent in mechanical properties, moldability, heat resistance and the like can be obtained. As the plasticizer, generally well-known ones can be used. For example, polyalkylene glycol plasticizer, polyester plasticizer, polyvalent carboxylate plasticizer, glycerin plasticizer, phosphate ester Can include plasticizers, epoxy plasticizers, fatty acid amides such as stearamide, ethylenebisstearic acid amide, pentaerythritol, various sorbitols, polyacrylic esters, silicone oils and paraffins, and bleed-out resistance From the viewpoint of polyethylene glycol, polypropylene glycol, poly (ethylene oxide / propylene oxide) block and / or random copolymer, polytetramethylene glycol, ethylene oxide addition polymer of bisphenol, bisphenol Polyalkylene glycols such as propylene oxide addition polymers of diols, tetrahydrofuran addition polymers of bisphenols, or terminal-capped compounds such as terminal epoxy-modified compounds, terminal ester-modified compounds, and terminal ether-modified compounds. Plasticizers, polyvalent carboxylic acid esters such as bis (butyl diglycol) adipate, methyl diglycol butyl diglycol adipate, benzyl methyl diglycol adipate, acetyl tributyl citrate, methoxycarbonylmethyl dibutyl citrate, ethoxycarbonylmethyl dibutyl citrate Plasticizer, glycerol monoacetomonolaurate, glycerol diacetomonolaurate, glycerol monoacetomonostearate, glycerol Glycerin-based plasticizers such as acetoacetic monooleate and glycerol mono acetonate monomontanate are preferred. These plasticizers can be used alone or in combination of two or more.

  In the present invention, the blending amount of the plasticizer is preferably in the range of 0.01 to 50 parts by weight with respect to 100 parts by weight of the total amount of (A) polylactic acid resin and (B) polyolefin resin, A range of ˜20 parts by weight is more preferred.

  In this invention, it is preferable at the point which can improve further durability and toughness of the resin composition obtained by mix | blending a carboxyl group reactive compound. The carboxyl group-reactive compound is not particularly limited as long as it is a compound reactive with the carboxyl end group of (A) polylactic acid resin, but (A) thermal decomposition or hydrolysis of polylactic acid resin. It is more preferable if it is reactive with the carboxyl group of acidic low molecular weight compounds such as lactic acid and formic acid produced by the above, and is also a compound reactive with the hydroxyl group end group of acidic low molecular weight compounds generated by thermal decomposition. More preferably.

  Such carboxyl group-reactive compounds include glycidyl ether compounds, glycidyl ester compounds, glycidyl amine compounds, glycidyl imide compounds, alicyclic epoxy compounds, epoxy group-containing compounds, 2,2′-m-phenylenebis (2- Oxazoline), oxazoline compounds such as 2,2'-p-phenylenebis (2-oxazoline), oxazine compounds, N, N'-di-2,6-diisopropylphenylcarbodiimide, 2,6,2 ', 6'- It is preferable to use at least one compound selected from carbodiimide compounds such as tetraisopropyldiphenylcarbodiimide and polycarbodiimide, and epoxy group-containing compounds and / or carbodiimide compounds are particularly preferable. As the carboxyl group-reactive compound, one or more compounds can be arbitrarily selected and used.

  In the present invention, the amount of the carboxyl group-reactive compound is preferably 0.01 to 10 parts by weight with respect to 100 parts by weight of the total amount of (A) polylactic acid resin and (B) polyolefin resin, 0.05 -5 parts by weight is more preferred.

  In the present invention, it is preferable to further add a reaction catalyst of a carboxyl group-reactive compound. The reaction catalyst here is a compound having an effect of promoting the reaction between the carboxyl group-reactive compound and the terminal of the (A) polylactic acid-based resin or the carboxyl group of the acidic low molecular weight compound. A compound having an effect of promoting the reaction is preferable, and the reaction catalyst of the carboxyl group-reactive compound preferably has an effect of promoting the reaction with the hydroxyl group of the acidic low molecular weight compound generated by thermal decomposition. As such a reaction catalyst, for example, an alkali metal compound, an alkaline earth metal compound, and a phosphate ester are preferable. The addition amount of the reaction catalyst is not particularly limited, but is preferably 0.001 to 1 part by weight with respect to 100 parts by weight of the total amount of (A) polylactic acid resin and (B) polyolefin resin, 0.01-0.2 weight part is more preferable, and 0.02-0.1 weight part is the most preferable.

In the present invention, it may be appropriately reacted with a carboxyl end group or an acidic low molecular weight compound depending on the application to be used. Specific (A) the terminal of the polylactic acid resin or the carboxyl group of the acidic low molecular weight compound or The degree of reactivity with the hydroxyl group is preferably such that the acid concentration in the resin composition is 10 equivalents / 10 ⁶ g or less from the viewpoint of hydrolysis resistance, and 5 equivalents / 10 ⁶ g. The reaction is more preferably carried out so that it is less than or equal to 1 equivalent / 10 ⁶ g or less. The acid concentration in the resin composition can be measured by dissolving the resin composition in an appropriate solvent and then titrating with an alkaline compound solution with a known concentration such as sodium hydroxide or nuclear magnetic resonance (NMR). it can.

  In the present invention, other thermoplastic resins are preferably blended from the viewpoint that a resin composition excellent in mechanical properties, moldability, heat resistance and the like can be obtained. Especially, it is preferable to mix | blend a methacrylic resin from the point of transparency. Moreover, it is preferable to mix | blend an impact modifier from the point of impact resistance, heat resistance, and surface peeling resistance. In the present invention, the impact resistance improver is not contained in (A) polylactic acid resin, (B) polyolefin resin (C) compatibilizer, and has an effect as an elastomer. , (A), (B) and (C) may be a reactive elastomer containing a functional group reactive with at least one of the components, or an unreactive elastomer that is not reactive. Is an unreactive elastomer that has no reactivity with any of the components (A), (B), and (C) in terms of impact resistance, heat resistance, surface peel resistance, and mechanical properties. It is preferable. Specifically, acrylic rubber, diene rubber (for example, polybutadiene, polyisoprene, polychloroprene), a copolymer of diene units and vinyl units, or a hydrogenated copolymer thereof (for example, styrene / butadiene random copolymer) Styrene / butadiene block copolymer, styrene / butadiene / styrene block copolymer (SBS), styrene / isoprene random copolymer, styrene / isoprene block copolymer, styrene / isoprene / styrene block copolymer (SIS) ), Graft copolymer of styrene and polybutadiene, butadiene / acrylonitrile copolymer, styrene / butadiene / butylene / styrene block copolymer (SBBS), styrene / ethylene / butylene / styrene block copolymer (SE) S), styrene / ethylene / propylene block copolymer (SEP), styrene / ethylene / propylene / styrene block copolymer (SEPS), styrene / ethylene / ethylene / propylene / styrene block copolymer (SEEPS)), poly Examples thereof include isobutylene, a copolymer of isobutylene and butadiene or isoprene, natural rubber, thiocol rubber, polysulfide rubber, polyurethane rubber, polyether rubber, epichlorohydrin rubber and the like. Further, it is composed of various cross-linking degrees, various micro structures such as cis structure and trans structure, vinyl group and the like, and a core layer and one or more shell layers covering it. In addition, a multilayer structure polymer called a so-called core-shell elastomer in which adjacent layers are made of different polymers can be used. In the present invention, in terms of impact resistance, heat resistance, surface peel resistance and mechanical properties, (C) the compatibilizer is (C-4) an acid anhydride group, carboxyl group, amino group, imino group, In the case of an acrylic resin or styrene resin containing at least one functional group selected from an alkoxysilyl group, silanol group, silyl ether group, hydroxyl group and epoxy group, an impact modifier is further used in combination. The impact resistance improver is preferably at least one selected from SBS, SIS, SBBS, SEBS, SEP, SEPS, SEEPS, and core-shell type elastomers. SBBS, SEBS, SEPS, SEEPS More preferably one or more selected from core-shell elastomers, SEBS or SEPS More preferably from Zureka one, and most preferably SEBS.

  In the present invention, when the impact resistance improver is a copolymer of a diene unit and a vinyl unit or a hydrogenated copolymer thereof, the impact resistance, heat resistance, toughness, and surface peel resistance are excellent. In this respect, the vinyl unit is preferably an aromatic vinyl unit, and more preferably styrene. In addition, the vinyl unit is preferably 1 to 30% by weight, more preferably 5 to 15% by weight in terms of particularly excellent balance of impact resistance, heat resistance, toughness and surface peel resistance. .

  The method for producing the resin composition of the present invention is not particularly limited as long as the requirements specified in the present invention are satisfied. For example, (A) a polylactic acid resin, (B) a polyolefin resin, and (C) Compatibilizing agent and other additives as needed, blended in advance and then melted and kneaded uniformly using a single screw or twin screw extruder, etc. above the melting point, or after mixing in solution A method of volatilizing and removing is preferably used.

  In the present invention, as a method of melt-kneading using a single screw or twin screw extruder, for example, in order to obtain a resin composition having a preferred phase structure, for example, (A) polylactic acid resin, (B) polyolefin Resin, (C) compatibilizing agent and other additives collectively melt-kneaded, (A) polylactic acid-based resin, (B) polyolefin-based resin and (C) compatibilizing agent are previously melt-kneaded to obtain a resin composition After obtaining the product, melt and knead with other additives as necessary, supply (A) polylactic acid resin, (B) polyolefin resin and (C) compatibilizer from the main feeder, Accordingly, there may be mentioned a method of supplying other additives from the side feeder at the tip of the extruder. In addition, when blending a filler, supply other additives other than (A) polylactic acid resin, (B) polyolefin resin, (C) compatibilizer and filler from the main feeder, and fill the side with the filler. A method of supplying from a feeder is preferred.

  In the present invention, the melt kneading temperature when producing the resin composition is preferably 170 to 250 ° C, more preferably 175 to 230 ° C, and particularly preferably 180 to 220 ° C.

  The resin composition of the present invention can be formed into a molded product by various known molding methods. As the molding method, injection molding, extrusion molding, press molding, blow molding and the like are preferable, and particularly useful by processing into various molded products such as injection molded products, extrusion molded products, press molded products and blow molded products. It can also be used as a sheet, film, fiber, or the like.

  In the present invention, when injection molding is selected as the molding method, the mold temperature is preferably 30 ° C. or higher, more preferably 70 ° C. or higher, from the viewpoint of heat resistance, moldability, and appearance. 120 degrees C or less is preferable from the point that a deformation | transformation can be suppressed, 99 degrees C or less is more preferable, and 90 degrees C or less is further more preferable.

  Molded articles made of the resin composition of the present invention are used in various applications such as automobile parts (interior / exterior parts, etc.), electrical / electronic parts (various housings, gears, gears, etc.), building members, civil engineering members, agricultural materials, and daily necessities. Can be used.

  Specifically, air flow meter, air pump, thermostat housing, engine mount, ignition hobbin, ignition case, clutch bobbin, sensor housing, idle speed control valve, vacuum switching valve, ECU housing, vacuum pump case, inhibitor switch, rotation sensor, Accelerometer, Distributor cap, Coil base, Actuator case for ABS, Top and bottom of radiator tank, Cooling fan, Fan shroud, Engine cover, Cylinder head cover, Oil cap, Oil pan, Oil filter, Fuel cap, Fuel strainer, Distribution Turcap, vapor canister housing Air cleaner housing, timing belt cover, brake booster parts, various cases, various tubes, various tanks, various hoses, various clips, various valves, various pipes, automotive underhood parts, torque control levers, safety belt parts, register blades , Washer lever, window regulator handle, window regulator handle knob, passing light lever, sun visor bracket, various motor housings, spare tire covers, door trim and other automotive interior parts, roof rails, fenders, garnishes, bumpers, door mirror stays, spoilers , Hood louver, wheel cover, wheel cap, grill apron cover frame, lamp reflector, lamp bezel Automotive exterior parts such as door handles, mention may be made of wire harness connector, SMJ connector, PCB connector, the auto parts typified by various connector for automobiles such as door grommet connector. Also, notebook computer housings and internal parts, CRT display housings and internal parts, printer housings and internal parts, mobile terminal housings and internal parts such as mobile phones, mobile personal computers and handheld mobiles, recording media (CD, DVD, PD, FDD) Etc.) Electrical and electronic parts represented by drive housings and internal parts, copier housings and internal parts, facsimile housings and internal parts, parabolic antennas and the like. Furthermore, audio equipment parts such as VTR parts, TV parts, irons, hair dryers, rice cooker parts, microwave oven parts, acoustic parts, video cameras, audio / laser discs (registered trademark) / compact discs, lighting parts, refrigerator parts, Examples include home and office electrical product parts such as air conditioner parts, typewriter parts, and word processor parts. Also, housings and internal parts of electronic musical instruments, home game machines, portable game machines, various gears, various cases, sensors, LEP lamps, connectors, sockets, resistors, relay cases, motor cases, switches, capacitors, variable capacitors Case, optical pickup, oscillator, various terminal boards, transformer, plug, printed wiring board, tuner, speaker, microphone, headphones, small motor, magnetic head base, power module, semiconductor, liquid crystal, FDD carriage, FDD chassis, motor Electric and electronic parts such as brush holders, transformer members, coil bobbins, sash doors, blind curtain parts, piping joints, curtain liners, blind parts, gas meter parts, water meter parts, water heater parts, roof panels , Heat insulation walls, adjusters, plastic bundles, ceiling fishing gear, stairs, doors, floors and other building materials, fishing lines, fishing nets, seaweed aquaculture nets, fishing bait bags and other fishery related parts, vegetation nets, vegetation mats, grass bags, Weed prevention net, curing sheet, slope protection sheet, fly ash holding sheet, drain sheet, water retention sheet, sludge / sludge dehydration bag, concrete formwork and other civil engineering related members, gears, screws, springs, bearings, levers, key stems, Cams, ratchets, rollers, water supply parts, toy parts, fans, tegs, pipes, cleaning jigs, motor parts, microscopes, binoculars, cameras, clocks, and other mechanical parts, multi-films, tunnel films, bird seats, vegetation Nonwoven fabric for protection, pot for seedling, vegetation pile, seed string tape, germination sheet, house lining sheet, agricultural PVC film stopper, slow-release fertilizer, root prevention , Garden net, insect net, infant tree net, print laminate, fertilizer bag, sample bag, sandbag, animal damage prevention net, inducement string, wind net, etc., paper diaper, sanitary wrapping material, cotton swab, towel , Hygiene items such as toilet seat wipes, medical non-woven fabrics (stitching reinforcements, anti-adhesion membranes, prosthetic repair materials), wound dressings, wound tape bandages, sticker base fabrics, surgical sutures, fracture reinforcements, medical Medical supplies such as film, calendar, stationery, clothing, food packaging film, tray, blister, knife, fork, spoon, tube, plastic can, pouch, container, tank, basket, etc. Fill containers, microwave cooking containers, cosmetic containers, wraps, foam buffers, paper laminates, shampoo bottles, beverage bottles, cups, candy packaging, chestnuts Containers such as link labels, lid materials, envelopes with windows, fruit baskets, hand cut tape, easy peel packaging, egg packs, HDD packaging, compost bags, recording media packaging, shopping bags, wrapping films for electrical and electronic parts, etc. Packaging, natural fiber composites, polo shirts, T-shirts, innerwear, uniforms, sweaters, socks, ties, and other clothing, curtains, chairs, carpets, tablecloths, futons, wallpaper, furoshiki and other interior goods, carrier tape, Print lamination, heat sensitive stencil printing film, release film, porous film, container bag, credit card, cash card, ID card, IC card, paper, leather, non-woven fabric hot melt binder, magnetic material, zinc sulfide, electrode Powder binders for materials, optical elements, conductive Embossed tape, IC tray, golf tee, garbage bag, plastic bag, various nets, toothbrush, stationery, draining net, body towel, hand towel, tea pack, drainage filter, clear file, coating agent, adhesive, bag, chair It is useful as a table, cooler box, kumade, hose reel, planter, hose nozzle, dining table, desk surface, furniture panel, kitchen cabinet, pen cap, gas lighter and so on.

  From the viewpoint of impact resistance, the resin composition of the present invention preferably has an Izod impact strength of 45 J / m or more, more preferably 55 J / m or more, and further preferably 70 J / m or more. It is preferably 100 J / m or more. Here, the Izod impact strength is an Izod impact strength of a strip-shaped molded article having a 3 mm thickness notch, measured according to ASTM D256.

  From the viewpoint of heat resistance, the resin composition of the present invention preferably has a deflection temperature under a load of 0.45 MPa of 70 ° C. or higher, more preferably 80 ° C. or higher, and 85 ° C. or higher. More preferably, it is particularly preferably 90 ° C. or higher, and most preferably 100 ° C. or higher. Here, the deflection temperature under load is a deflection temperature under load of a molded product of 12.7 mm × 127 mm × 3 mm, measured according to ASTM D648.

  From the viewpoint of impact resistance and heat resistance, the resin composition of the present invention preferably has an Izod impact strength of 55 J / m or more, a deflection temperature under a load of 0.45 MPa of 85 ° C. or more, and an Izod impact strength of 70 J. / M or more, the deflection temperature under load at 0.45 MPa is more preferably 100 ° C. or more, the Izod impact strength is at least 100 J / m, and the deflection temperature under load at 0.45 MPa is more preferably 100 ° C. or more. .

  EXAMPLES Next, although an Example demonstrates this invention further in detail, these do not limit this invention. Moreover, the raw material used and the code | symbol in a table | surface are shown below.

(A) Polylactic acid resin (A-1) Poly L lactic acid resin (D body 1.2%, Mw (converted to PMMA) 160,000, melting point 168 ° C.)
(A-2) Poly L lactic acid resin (D body 4.2%, Mw (PMMA conversion) 210,000, melting point 158 ° C.).

(B) Polyolefin-based resin (B-1) Polypropylene resin (homopolymer, prime polymer J106G, MFR 15 g / 10 min (230 ° C., 21.2 N), melting point 169 ° C.)
(B-2) Polypropylene resin (homopolymer, prime polymer J108M, MFR 45 g / 10 min (230 ° C., 21.2 N), melting point 169 ° C.)
(B-3) Polypropylene resin (block polymer, prime polymer J715M, MFR 9 g / 10 min (230 ° C., 21.2 N), melting point 169 ° C.)
(B-4) Polypropylene resin (homopolymer, prime polymer F122G, MFR 2 g / 10 min (230 ° C., 21.2 N), melting point 169 ° C.)
(B-5) Polyethylene resin (“Neozex” 1014T made by prime polymer, MFR 10 g / 10 min (190 ° C., 21.2 N), melting point 113 ° C.)
(B-6) Polyethylene resin ("Neozex" 0134N made by prime polymer, MFR 1.2 g / 10 min (190 ° C, 21.2N), melting point 117 ° C).

(C) Compatibilizer (C-1) Ethylene / vinyl acetate copolymer (C-1-1) Ethylene / vinyl acetate copolymer resin ("Evaflex" EV450 made by Mitsui DuPont Polychemicals, vinyl acetate content 19 wt%, MFR 15 g / 10 min (190 ° C., 21.2 N))
(C-1-2) Ethylene / vinyl acetate copolymer resin ("Levaprene" 400 manufactured by LANXESS, vinyl acetate content 40 wt%, MFR 3 g / 10 min (190 ° C, 21.2 N))
(C-1-3) Ethylene / vinyl acetate copolymer resin (Evaflex EV45LX, vinyl acetate content 46 wt%, MFR 3 g / 10 min (190 ° C., 21.2 N) manufactured by Mitsui DuPont Polychemical)
(C-1-4) Ethylene / vinyl acetate copolymer resin ("Evaflex" EV45X manufactured by Mitsui DuPont Polychemicals, vinyl acetate content 46 wt%, MFR 100 g / 10 min (190 ° C, 21.2 N))
(C-1-5) Ethylene / vinyl acetate copolymer resin ("Levaprene" 600HV manufactured by LANXESS, vinyl acetate content 60% by weight, MFR 3g / 10 min (190 ° C, 21.2N))
(C-1-6) Ethylene / vinyl acetate copolymer resin (“Levaprene” 800 HV manufactured by LANXESS, vinyl acetate content 80 wt%, MFR 4 g / 10 min (190 ° C., 21.2 N)).

(C-2) Ethylene / (meth) acrylic acid ester copolymer (C-2-1) Ethylene / methyl acrylate copolymer resin (Arochem "Lotryl" 18MA02, methyl acrylate content 18 wt%, MFR 2 g / 10 minutes (190 ° C, 21.2N))
(C-2-2) Ethylene / methyl acrylate copolymer resin ("Lotril" 29MA03 manufactured by Arkema, methyl acrylate content 29 wt%, MFR 3 g / 10 min (190 ° C, 21.2 N))
(C-2-3) Ethylene / ethyl acrylate copolymer resin ("Evaflex EEA" A-709 manufactured by Mitsui DuPont Polychemicals, ethyl acrylate content 34 wt%, MFR 25 g / 10 min (190 ° C, 21 .2N))
(C-2-4) ethylene / ethyl acrylate / methyl methacrylate copolymer resin (“MODIPA” A5200, manufactured by NOF Corporation, melting point 72 ° C., ethyl acrylate content 20% by weight, methyl methacrylate content 30% by weight, MFR 3g / 10min (190 ° C, 21.2N))
(C-2-5) Ethylene / methyl methacrylate copolymer resin (“Acrylift” WK402, manufactured by Sumitomo Chemical Co., Ltd., melting point 79 ° C., methyl methacrylate content 25% by weight, MFR 20 g / 10 min (190 ° C., 21.2 N))
(C-2-6) Ethylene / methyl methacrylate copolymer resin (“Aclift” CM5021 manufactured by Sumitomo Chemical Co., Ltd., methyl methacrylate content 28% by weight, MFR 450 g / 10 min (190 ° C., 21.2 N)).

(C-3) Polyolefin system containing at least one functional group selected from an acid anhydride group, carboxyl group, amino group, imino group, alkoxysilyl group, silanol group, silyl ether group, hydroxyl group and epoxy group Resin (C-3-1) Ethylene / glycidyl methacrylate copolymer resin ("Bond First" E, manufactured by Sumitomo Chemical Co., Ltd., melting point 88 ° C, glycidyl methacrylate 12% by weight, MFR 3g / 10 min (190 ° C, 21.2N))
(C-3-2) ethylene / methyl acrylate / glycidyl methacrylate copolymer resin (Sumitomo Chemical "bond first" 7M, methyl acrylate content 30% by weight, glycidyl methacrylate content 6% by weight, MFR 9g / 10 Min (190 ° C, 21.2N))
(C-3-3) ethylene / vinyl acetate / glycidyl methacrylate copolymer resin ("Sumitomo Chemical" bond first "7B, vinyl acetate content 5 wt%, glycidyl methacrylate content 12 wt%, MFR 7 g / 10 min ( 190 ° C, 21.2 N))
(C-3-4) Ethylene / ethyl acrylate / maleic anhydride copolymer resin (“BONDINE” AX8390, manufactured by Arkema, ethyl acrylate content 29 wt%, maleic anhydride content 3 wt%, MFR 7 g / 10 min ( 190 ° C, 21.2 N))
(C-3-5) Maleic anhydride graft-modified polypropylene resin (“OREVAC” G18750, manufactured by Arkema, maleic anhydride content 1% by weight, MFR 35 g / 10 min (230 ° C., 21.2 N)).

(C-4) An acrylic group containing at least one functional group selected from an acid anhydride group, a carboxyl group, an amino group, an imino group, an alkoxysilyl group, a silanol group, a silyl ether group, a hydroxyl group and an epoxy group Resin or Styrene Resin (C-4-1) Epoxy Group-Containing Styrene / Acrylate Ester Copolymer (Johnson Polymer “JONCRYL” ADR-4368, Weight Average Molecular Weight 80,000, Epoxy Value 3.5 meq / g)
(C-4-2) Epoxy group-containing acrylic copolymer (Nippon Yushi "Malproof" 2050M, weight average molecular weight 210,000, epoxy value 2.9 meq / g)
(C-4-3) Maleic anhydride-modified SEBS (Clayton “Clayton” FG1924, styrene content 13% by weight, maleic anhydride content 1% by weight, MFR 11 g / 10 min (230 ° C., 21.2 N))
(C-4-4) Maleic anhydride-modified SEBS (“Tough Tech” M1943, manufactured by Asahi Kasei Chemicals Co., Ltd., styrene content 30% by weight, MFR 8 g / 10 min (230 ° C., 21.2 N))
(C-4-5) Imine group-modified SEBS (“Tough Tech” N503, manufactured by Asahi Kasei Chemicals Co., Ltd., styrene content 30% by weight, MFR 20 g / 10 minutes (230 ° C., 21.2 N)) (C-4-6) amino group modification SEBS (JSR “Dynalon” 8630P, styrene content 15% by weight, MFR 15 g / 10 min (230 ° C., 21.2 N))
(C-5) Ionomer resin (C-5-1) Ionomer resin (“High Milan” 1702 manufactured by Mitsui DuPont Polychemicals, MFR 16 g / 10 min (190 ° C., 21.2 N)).

(D) Filler (D-1) Talc (Nihon Talc P-6)
(D-2) Kaolin (“Translink” 555 manufactured by Engelhard).

(E) Plasticizer (E-1) Polyethylene glycol (PEG 6000S manufactured by Sanyo Chemical Industries)
(E-2) Aliphatic ester plasticizer ("Daifatty" -101 manufactured by Daihachi Chemical Industry).

(F) Carboxyl group reactive compound (F-1) Polycarbodiimide (Nisshinbo “Carbodilite” LA-1)
(F) A carboxyl group-reactive compound.

(G) Other thermoplastic resin (G-1) Methacrylic resin (“SUMIPEX” LG35 manufactured by Sumitomo Chemical)
(G-2) Methacrylic resin (“SUMIPEX” MHF manufactured by Sumitomo Chemical)
(G-3) SEBS ("Clayton" G1657 made by Kraton, styrene content 13 wt%)
(G-4) SEPS (Kuraray "Septon" 4033, styrene content 30 wt%).

  The measurement method and determination method used in the present invention are shown below.

(1) Weight average molecular weight (Mw)
It is a value of weight average molecular weight in terms of standard PMMA measured by gel permeation chromatography (GPC). Hexafluoroisopropanol was used as a solvent, the flow rate was 0.5 mL / min, and 0.1 mL of a solution having a sample concentration of 1 mg / mL was injected and measured.

(2) Fluidity (MFR)
According to JIS K7210, it measured at 190 degreeC or 230 degreeC and a 21.2N load.

(3) Formability Regarding the formability, when a tensile test piece that can be subjected to a tensile test was taken out from the mold, the shortest time during which a solidified molded product without deformation was obtained was measured as the molding cycle time. It can be said that the shorter the molding cycle time, the better the moldability.

(4) Impact resistance (Izod impact strength)
In accordance with ASTM D256, the Izod impact strength of a 3 mm thick notched strip-shaped product was measured.

(5) Heat resistance (DTUL)
According to ASTM D648, the deflection temperature under load (load 0.45 MPa) of a molded article of 12.7 mm × 127 mm × 3 mm was measured.

(6) Tensile strength and elongation at break According to ASTM method D638, a tensile test was conducted using a 3 mm thick ASTM No. 1 dumbbell molded product.

(7) Transparency Using a haze meter (NDH-300A manufactured by Nippon Denshoku Industries Co., Ltd.), the total light transmittance of a 5 cm × 5 cm × 1 mm plate-like molded product was measured.

(8) Surface peeling resistance A cellophane tape was attached to the vicinity of the gate of ASTM No. 1 dumbbell and peeled after 5 seconds. Then, the state of the surface of the molded product was observed and judged according to the following criteria.

5: No peeling at all 4: Intermediate between 3 and 5 3: Partial peeling between 2: 1 and 3 1: All surface peeling.

[Examples 2-5 , 9-11 , Comparative Examples 1-4 , 12-15 ]
As shown in Table 1, the raw materials were blended, and using a 30 mm diameter twin screw extruder (TEX-30α manufactured by Nippon Steel Works), melt kneading was performed under the conditions of a cylinder temperature of 200 ° C. and a rotation speed of 200 rpm to obtain a resin composition. Obtained.

  The obtained resin composition was injection molded at a cylinder temperature of 200 ° C. and a mold temperature of 80 ° C. using an injection molding machine (SG75H-MIV manufactured by Sumitomo Heavy Industries, Ltd.) to obtain molded products for various evaluations.

  Table 1 shows the results of various evaluations using the obtained molded product.

  From the results in Table 1, it can be seen that the resin composition and molded product of the present invention are excellent in moldability, impact resistance and heat resistance.

[Examples 12-14, Comparative Examples 5-8]
As shown in Table 2, the raw materials were blended and melt-kneaded using a 30 mm diameter twin screw extruder (TEX-30α manufactured by Nippon Steel Works) under the conditions of a cylinder temperature of 200 ° C. and a rotation speed of 200 rpm, and the resin composition was obtained. Obtained.

  The obtained resin composition was injection-molded at a cylinder temperature of 200 ° C. and a mold temperature of 30 ° C. using an injection molding machine (SG75H-MIV manufactured by Sumitomo Heavy Industries, Ltd.) to obtain molded products for various evaluations.

  Table 2 shows the results of various evaluations using the obtained molded product.

  From the results in Table 2, it can be seen that the resin composition and molded product of the present invention are excellent in moldability, impact resistance and heat resistance.

[Examples 15 , 17 , 19 to 26, Comparative Examples 9 to 11 , 16, 17 ]
As shown in Table 3, the raw materials were blended and melt-kneaded using a 30 mm diameter twin screw extruder (TEX-30α manufactured by Nippon Steel Works) under the conditions of a cylinder temperature of 200 ° C. and a rotation speed of 200 rpm to obtain a resin composition. Obtained.

  The obtained resin composition was injection molded at a cylinder temperature of 200 ° C. and a mold temperature of 80 ° C. using an injection molding machine (SG75H-MIV manufactured by Sumitomo Heavy Industries, Ltd.) to obtain molded products for various evaluations.

  Table 3 shows the results of various evaluations using the obtained molded product.

  From the results in Table 3, it can be seen that the resin composition and molded product of the present invention are excellent in moldability, impact resistance and heat resistance.

[Examples 28 to 31, 33 to 40, Comparative Examples 19 and 20 ]
As shown in Table 4, the raw materials were blended and melt kneaded using a 30 mm diameter twin screw extruder (TEX-30α manufactured by Nippon Steel Works) under the conditions of a cylinder temperature of 200 ° C. and a rotation speed of 200 rpm to obtain a resin composition. Obtained.

  The obtained resin composition was injection molded at a cylinder temperature of 200 ° C. and a mold temperature of 80 ° C. using an injection molding machine (SG75H-MIV manufactured by Sumitomo Heavy Industries, Ltd.) to obtain molded products for various evaluations.

  Table 4 shows the results of various evaluations using the obtained molded product.

  From the results of Table 4, it can be seen that the resin composition and molded product of the present invention are excellent in moldability, impact resistance and heat resistance.

[Examples 41 to 49]
As shown in Table 5, the raw materials were blended, and using a 30 mm diameter twin screw extruder (TEX-30α manufactured by Nippon Steel Works), melt kneading was performed under the conditions of a cylinder temperature of 200 ° C. and a rotation speed of 200 rpm to obtain a resin composition. Obtained.

  The obtained resin composition was injection-molded at a cylinder temperature of 200 ° C. and a mold temperature of 30 ° C. using an injection molding machine (SG75H-MIV manufactured by Sumitomo Heavy Industries, Ltd.) to obtain molded products for various evaluations.

  Table 5 shows the results of various evaluations using the obtained molded product.

  From the results of Table 5, it can be seen that the resin composition and molded product of the present invention are excellent in moldability, impact resistance and heat resistance.

[Examples 51 to 70 , Comparative Example 18 ]
The raw materials are blended as shown in Tables 6 and 7, and melt-kneaded under the conditions of a cylinder temperature of 200 ° C. and a rotational speed of 200 rpm using a 30 mm diameter twin screw extruder (TEX-30α manufactured by Nippon Steel) A composition was obtained.

  The obtained resin composition was injection molded at a cylinder temperature of 200 ° C. and a mold temperature of 80 ° C. using an injection molding machine (SG75H-MIV manufactured by Sumitomo Heavy Industries, Ltd.) to obtain molded products for various evaluations.

  Tables 6 and 7 show the results of various evaluations using the obtained molded product.

  From the results of Tables 6 and 7, it can be seen that the resin composition and molded product of the present invention are excellent in moldability, impact resistance and heat resistance.

[Examples 71 to 78]
The raw materials are blended as shown in Table 8, and melt-kneading is performed using a 30 mm diameter twin screw extruder (TEX-30α manufactured by Nippon Steel Works) at a cylinder temperature of 200 ° C. and a rotation speed of 200 rpm. Obtained.

  The obtained resin composition was injection molded at a cylinder temperature of 200 ° C. and a mold temperature of 80 ° C. using an injection molding machine (SG75H-MIV manufactured by Sumitomo Heavy Industries, Ltd.) to obtain molded products for various evaluations.

  Table 8 shows the results of various evaluations using the obtained molded product.

  From the results in Table 8, it can be seen that the resin composition and molded product of the present invention are excellent in moldability, impact resistance and heat resistance.

[Examples 79 to 103]
The raw materials are blended as shown in Tables 9 and 10, and melt-kneaded under the conditions of a cylinder temperature of 200 ° C. and a rotational speed of 200 rpm using a 30 mm diameter twin screw extruder (TEX-30α manufactured by Nippon Steel) A composition was obtained.

  The obtained resin composition was injection molded at a cylinder temperature of 200 ° C. and a mold temperature of 80 ° C. using an injection molding machine (SG75H-MIV manufactured by Sumitomo Heavy Industries, Ltd.) to obtain molded products for various evaluations.

  Tables 9 and 10 show the results of various evaluations using the obtained molded product.

  From the results of Tables 9 and 10, it can be seen that the resin composition and molded product of the present invention are excellent in moldability, impact resistance and heat resistance, and in a preferred embodiment, are excellent in toughness and / or surface peel resistance. .

Claims (7)

Assuming that the total amount of (A) and (B) is 100 parts by weight, (A) 1 to 60 parts by weight of a polylactic acid resin, (B) 99 to 40 parts by weight of a polyolefin resin, and at least one ( C) A resin composition comprising 1 to 50 parts by weight of a compatibilizer.
(C-4) Acrylic resin or styrene resin containing an epoxy group having an epoxy value of 1 to 7 meq / g, or an acid anhydride group, carboxyl group, amino group, imino group, alkoxysilyl group Acrylic resin or styrene resin (C-3) acid anhydride group, carboxyl group, amino group, imino group, containing at least one functional group selected from silanol group, silyl ether group, and hydroxyl group, A polyolefin-based resin containing at least one functional group selected from an alkoxysilyl group, a silanol group, a silyl ether group, a hydroxyl group and an epoxy group, which satisfies all of the following conditions (c-3-1) ) Vinyl acetate content or (meth) acrylic acid ester content is 3 to 45% by weight
(C-3-2) A melt flow rate at 190 ° C. and a load of 21.2N is 1 g / 10 min or more (C-1) an ethylene / vinyl acetate copolymer that satisfies all of the following conditions: (C-1-1) The vinyl acetate content is 25% by weight or more and less than 55% by weight (c-1-2) The melt flow rate at 190 ° C. and 21.2N load is 30 g / 10 min. The following (C-2) ethylene / (meth) acrylic acid ester copolymer satisfying one or more of the following conditions:
(C-2-1) (meth) acrylic acid ester content is 26% by weight or more
(C-2-2) Melt flow rate at 190 ° C. and 21.2N load condition is 8 g / 10 min or more (C) The compatibilizer is one or more of the (C-1) ethylene / vinyl acetate copolymer and the (C-3) acid anhydride group, carboxyl group, amino group, imino group, alkoxysilyl group, The resin composition according to claim 1 , wherein one or more polyolefin-based resins containing at least one functional group selected from a silanol group, a silyl ether group, a hydroxyl group and an epoxy group are used in combination. (C) Compatibilizer is (C-4) an acrylic resin or styrene resin containing an epoxy group and having an epoxy value of 1 to 7 meq / g, or an acid anhydride group, carboxyl group, amino Acrylic resin or styrene resin containing at least one functional group selected from a group, an imino group, an alkoxysilyl group, a silanol group, a silyl ether group, and a hydroxyl group, and further used in combination with an impact resistance improver The resin composition according to claim 1, which is blended. Furthermore, the resin composition of any one of Claims 1-3 formed by mix | blending a filler. Furthermore, the resin composition of any one of Claims 1-4 formed by mix | blending a plasticizer. The resin composition according to any one of claims 1 to 5 , wherein an Izod impact strength is 55 J / m or more and a deflection temperature under load at a load of 0.46 MPa is 85 ° C or more. A molded article comprising the resin composition according to any one of claims 1 to 6 .