JP2005264147A - Resin composition, resin molded article and nucleating agent for polyester - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin composition to promote the crystallization of a polyester such as a biodegradable polyester and provide a resin molded article produced by molding the resin composition and a nucleating agent to be added to the resin composition. <P>SOLUTION: The resin composition is produced by adding a specific compound to a polyester capable of taking a crystal structure. The crystallinity of the polyester can be increased by the activity of the specific compound as a nucleating agent. The polyester is preferably a biodegradable polylactic acid. The resin composition contains 0.001-10 pts. wt. of the compound based on 100 pts. wt. of the polyester. The resin composition further contains an agent for suppressing the hydrolysis of the polyester. The resin composition contains an inorganic filler in addition to the polyester and the compound. The amount of the inorganic filler in the resin composition is 1-50 pts. mass based on 100 pts. mass of the polyester. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a resin composition containing a polyester capable of taking a crystal structure, a resin molded product obtained by molding the resin composition, and a nucleating agent contained in the resin composition. The present invention relates to a nucleating agent for promoting crystallization.

  Compared to conventional synthetic resins, biodegradable resins, for example, are non-fossil fuels, so there is no risk of resource depletion, and because they are decomposed in nature, they can fundamentally solve the problem of waste disposal sites. In addition, there are advantages such as being capable of being produced from natural resources such as corn, and being able to suppress the amount of CO2 gas generated, which is a cause of global warming, as a whole. Among many biodegradable resins, aliphatic polyesters, particularly polylactic acid, have a high melting point (170 to 180 ° C.), and molded products made of polylactic acid are usually characterized by transparency. Has already begun to be put into practical use.

  For biodegradable resins, for example, materials for agriculture, forestry and fisheries (films, planting pots, fishing lines, fish nets, etc.), civil engineering materials (water retention sheets, plant nets, etc.), packaging / container fields (soil, foods, etc.) However, disposable products such as daily goods, sanitary goods, and play goods are mainly used, but further expansion of applications is being considered from the viewpoint of environmental protection. For example, it may be applied to electrical products such as television housings and personal computer housings, and electronic products.

  Here, it is said that heat resistance up to a temperature of about 80 ° C. is generally required when considering applications such as housings and structural materials for electrical products.

  However, a molded product made of polylactic acid, which is a representative example of biodegradable polyester, has poor heat resistance and has a glass transition temperature (Tg) of around 60 ° C. May end up. Therefore, various studies have been made to use biodegradable resins such as polylactic acid for applications requiring heat resistance. In addition, heat resistance here means that rigidity (elastic modulus) in the vicinity of 80 ° C. is sufficiently high as about 100 MPa.

  In order to increase the heat resistance of the biodegradable polyester, for example, the addition of an inorganic filler such as talc or mica having heat resistance has been studied. This is like putting a reinforcing bar in concrete, and aims to improve and harden the mechanical properties by adding a hard inorganic filler having heat resistance to the resin. However, improvement of heat resistance is not sufficient only by adding an inorganic filler.

  Therefore, it has been proposed to improve the heat resistance of polylactic acid, which is a typical example of biodegradable polyester, by performing heat treatment during or after molding. Polylactic acid can take a crystal structure, but is a polymer that is difficult to crystallize. Therefore, when polylactic acid is molded in the same manner as a general general-purpose resin, it becomes amorphous and becomes a molded product that easily undergoes thermal deformation. On the other hand, by performing heat treatment during or after molding, polylactic acid can be crystallized and hardened, and the heat resistance of the molded product can be improved.

  However, such a polylactic acid crystallization method has a problem that it takes a long time for crystallization. For example, injection molding usually requires a molding cycle of about 1 minute, but it is not practical to complete the crystallization of a polylactic acid molded product in a mold because it takes too much time.

  In addition, when polylactic acid is crystallized by an ordinary method, the crystal size becomes from the micron order to the submicron order, and the polylactic acid crystal itself becomes cloudy due to light scattering, resulting in loss of transparency. There is also.

  In order to solve these problems, that is, in order to promote crystallization of polyester, for example, addition of a nucleating agent to biodegradable polyester is being studied. The nucleating agent here serves as a primary crystal nucleus of the crystalline polymer and promotes crystal growth of the crystalline polymer. In a broad sense, the crystallization of the crystalline polymer may be promoted. In other words, a material that increases the crystallization rate of the polymer itself may be called a nucleating agent. When a nucleating agent such as the former is added to the resin, the polymer crystals become fine, and the rigidity of the resin is improved or the transparency is improved. Further, when crystallization is performed during molding, there is an advantage that the molding cycle can be shortened because the overall speed (time) of crystallization is increased.

  Examples of such effects can be seen in other crystalline resins. For example, polypropylene (hereinafter also referred to as PP) has improved rigidity and transparency by adding a nucleating agent, and PP with improved physical properties has been put to practical use in many molded products. As a nucleating agent in this case, for example, there is a sorbitol-based substance, and the mechanism of action has not been completely elucidated, but it is thought that the three-dimensional network created by this substance is acting effectively. Yes.

  Also, a metal salt type nucleating agent has been put into practical use for PP. Examples of metal salt type nucleating agents include hydroxy-di (t-butylbenzoate) aluminum, sodium bis (4-t-butylphenyl) phosphate, and sodium methylenebis (2,4-di-t-butylphenyl) phosphate. Examples include salts.

  However, the fact is that few effective nucleating agents have been found in aliphatic polyesters such as polylactic acid. For example, the above-mentioned talc also functions as a nucleating agent, and it is considered that talc can be a powerful nucleating agent depending on applications. However, in order to use talc as a nucleating agent, a sufficient effect cannot be obtained unless the addition amount is several tens of percent, and when the addition amount is increased in this way, another problem that the resin composition becomes brittle arises. In addition, at such an addition amount, the resin composition is white and transparency is not expected at all.

  As a nucleating agent for aliphatic polyester, for example, Patent Document 1 discusses sorbitol-based substances. This substance has a track record as a crystallization nucleating agent in PP, and it is described that it acts effectively even when added to polylactic acid.

  In addition, various methods have been studied as a method for promoting crystallization by adding a nucleating agent to polyester. Specifically, in Patent Document 2, for example, an aliphatic polyester has a melting point of 40 to 300 ° C. composed of an aliphatic carboxylic acid amide, an aliphatic carboxylate, an aliphatic alcohol and an aliphatic carboxylic acid ester as a transparent nucleating agent. A technique for adding at least one selected from the group of compounds has been proposed. In Patent Document 3, for example, aliphatic polyester has a melting point or softening point of 80 to 300 ° C. as a transparent nucleating agent, and 10 to 10 A technique for adding at least one organic compound selected from the group consisting of organic compounds having a melting entropy of 100 cal / K / mol has been proposed. Patent Document 4 discloses a specific example of a polylactic acid resin as a clarifying agent. Techniques for adding fatty acid esters having a structure have been proposed.

  However, when any of the nucleating agents described in Patent Documents 1 to 4 is used, the effect of promoting crystallization is small, the heat resistance is insufficient, and the practical use has not yet been achieved. Moreover, the present condition is that the effective nucleating agent which significantly accelerates | stimulates the crystallization of polyester when combined with polyester is not yet obtained.

JP-A-10-158369 JP-A-9-278991 JP-A-11-5849 Japanese Patent Laid-Open No. 11-116783

  The present invention has been proposed in view of such conventional circumstances, and an object thereof is to provide a resin composition capable of promoting crystallization of polyester such as biodegradable polyester, The present invention provides a resin molded product obtained by molding this resin composition and a nucleating agent contained in the resin composition.

  The present inventors include a predetermined compound shown in the color index issued by The Society of Dyers and Colorists in a polyester capable of taking a crystal structure, so that the compound functions as an effective nucleating agent. It has been found that crystallization is greatly promoted and the above-mentioned problems are solved, and the present invention has been completed.

  That is, the resin composition according to the present invention contains a polyester having a crystal structure and a compound represented by a color index issued by The Society of Dyers and Colorists, and the compounds include PR257, PR147, PY191, PR168, PY155, PY191: 1, mixed crystal of PR254 and PR202, PO16, PO34, PY55, PR279, PY17, PR146, PR184, PR253, PR2, PY62, PR22, PR211, PR213, PR23, PO48, PR238, PY165, PR48: 1, PR48: 2, PR48: 3, PR48: 4, or any one or more of PY16 (P is Pigment, R is Red, Y is Yellow, O Means Orange. .

  The resin molded product according to the present invention is formed by molding a resin composition containing a polyester having a crystalline structure and a compound shown in the color index issued by The Society of Dyers and Colorists, PR147, PY191, PR168, PY155, PY191: 1, mixed crystals of PR254 and PR202, PO16, PO34, PY55, PR279, PY17, PR146, PR184, PR253, PR2, PY62, PR22, PR211, PR213, PR23, PO48, PR238, PY165, PR48: 1, PR48: 2, PR48: 3, PR48: 4, PY16 contains one kind or plural kinds (provided that P is Pigment and R is Red) , Y for Yellow, O for Oran Means e.).

The nucleating agent for polyester according to the present invention contains a compound shown in the color index issued by The Society of Dyers and Colorists, and crystallizes polyester capable of taking a crystal structure, and as a compound, PR257, PR147, PY191, PR168 are used. , PY155, PY191: 1, mixed crystals of PR254 and PR202, PO16, PO34, PY55, PR279, PY17, PR146, PR184, PR253, PR2, PY62, PR22, PR211, PR213, PR23, PO48, PR238, PY165, PR48 : 1, PR48: 2, PR48: 3, PR48: 4, or any one or more of PY16 (P is Pigment, R is Red, Y is Yellow, O means Orange That.).

  According to the present invention, the predetermined compound shown in the color index issued by The Society of Dyers and Colorists is added to the polyester as a nucleating agent instead of as a pigment, so that the compound can take a crystal structure. It effectively acts as a nucleating agent and greatly promotes the crystallization of polyester.

  Thus, according to the present invention, the polyester is highly crystallized when the resin composition is molded into a molded product or after molding, and the molded product formed by molding this resin composition has a high degree of crystallinity of the polyester. As a result, rigidity, moldability and heat resistance are improved.

  According to the present invention, by combining a predetermined compound shown in the color index issued by The Society of Dyers and Colourists with a polyester capable of taking a crystal structure, the predetermined compound functions as a nucleating agent to produce polyester crystals. It is possible to provide a resin composition that exhibits excellent rigidity, moldability, and heat resistance when formed into a molded product.

  Further, according to the present invention, when a resin molded product is molded with the resin composition, the degree of crystallinity of the polyester in the resin composition is increased, so that the resin exhibits excellent rigidity, moldability and heat resistance. A molded article can be provided.

  Furthermore, according to the present invention, when a predetermined compound is added to a resin composition containing polyester capable of taking a crystal structure as a nucleating agent for polyester, crystallization of the polyester is promoted, so that excellent rigidity, molding It can be set as the resin molded product which shows property and heat resistance.

  Furthermore, according to the present invention, when the resin composition is desired to have a desired color, each of the predetermined compounds shown in the color index issued by The Society of Dyers and Colorists, which is a nucleating agent, has a unique color. Therefore, it is possible to obtain a resin composition having a predetermined color by selecting one or more of these compounds.

  Furthermore, according to the present invention, in addition to the predetermined compound shown in the color index issued by The Society of Dyers and Colorists, various colorants or pigments may be added as necessary to further increase the color range. It is also possible to obtain a spread resin composition.

  Below, the resin composition to which this invention was applied, a resin molded product, and the nucleating agent for polyester are demonstrated in detail.

  The resin composition to which the present invention is applied has at least a polyester capable of taking a crystal structure and a nucleating agent that promotes crystallization of the polyester. In the present invention, a polyester having a crystal structure, such as a biodegradable polyester, is added with a predetermined compound shown in the color index issued by The Society of Dyers and Colorists as a nucleating agent to promote crystallization of the polyester. The basic idea is to do. Here, the nucleating agent is a primary crystal nucleus of the crystalline polymer and promotes crystal growth of the crystalline polymer. In a broad sense, the crystallization of the crystalline polymer may be promoted. In other words, a material that increases the crystallization rate of the polymer itself may be called a nucleating agent. When the nucleating agent is added to the resin, the polymer crystals become fine and the crystallinity is increased, and the rigidity of the resin is improved or the transparency is improved. Further, when crystallization is performed during molding, the overall speed of crystallization, that is, the time required for crystallization is increased, so that the molding cycle can be shortened and the manufacturing yield can be improved.

  The polyester that can have a crystal structure constituting the resin composition is, for example, a polymer compound having at least one ester bond, and any polyester that has a crystal structure can be used. Both are applicable.

  Moreover, the thing which can take a crystal structure will not be specifically limited if it can take even a part of crystal structure, and all the molecular chains may not be arranged regularly. Furthermore, even if all the molecular chains are not regular, it is only necessary that some molecular chain segments can be oriented. Accordingly, the polyester capable of taking a crystal structure is preferably linear, but may be branched.

  In addition, as a polyester capable of taking a crystal structure, for example, there is no fear of resource depletion, it is decomposed in nature, it can be produced from natural resources such as corn, and biodegradability has the advantage of suppressing global warming. Polyester is preferred. Examples of such biodegradable polyesters include polyester resins that are metabolized by microorganisms. Among them, aliphatic polyesters having a good balance of moldability, heat resistance, and impact resistance are used. Is preferred.

  Specifically, examples of the aliphatic polyester include oxalic acid, polysuccinic acid, polyhydroxybutyric acid, polydiglycolic acid, polycaprolactone, polydioxanone, polylactic acid aliphatic polyester, and the like. Among these, it is preferable to use a polylactic acid aliphatic polyester as the aliphatic polyester. Examples of polylactic acid-based aliphatic polyesters include polymers of oxyacids such as lactic acid, malic acid, and glycolic acid, and copolymers thereof, among which hydroxycarboxylic acid-based aliphatic polyesters are preferably used. Further, among the hydroxycarboxylic acid-based aliphatic polyesters, polylactic acid is most preferable.

  The biodegradable polyester can be produced according to a known method. The production method may be any method as long as a biodegradable polyester can be produced. Examples thereof include a lactide method, a polycondensation of a polyhydric alcohol and a polybasic acid, or an intermolecular polycondensation of a hydroxycarboxylic acid having a hydroxyl group and a carboxyl group in the molecule.

  In particular, polylactic acid-based aliphatic polyesters are generally obtained by a method by ring-opening polymerization of lactide which is a cyclic diester and a corresponding lactone, a so-called lactide method, and, in addition to the lactide method, a direct dehydration condensation method of lactic acid. Manufactured by. Examples of the catalyst for producing the polylactic acid-based aliphatic polyester include metal compounds such as tin, antimony, zinc, titanium, iron, and aluminum. Among them, tin-based catalysts, aluminum-based catalysts, etc. Is preferred, and tin octylate and aluminum acetylacetonate are particularly preferred.

  Poly L-lactic acid obtained by lactide ring-opening polymerization is preferable among polylactic acid-based aliphatic polyesters. This is because poly-L-lactic acid is hydrolyzed to L-lactic acid and its safety has been confirmed. However, the polylactic acid-based aliphatic polyester is not limited to this, and the lactide used for its production is not limited to the L-form. Specifically, for example, biodegradable polyester (product name: H100J) manufactured by Mitsui Chemicals, Inc. is used as the polyester capable of taking a crystal structure.

  In this resin composition, polyester or other biodegradable resins that do not necessarily have a crystal structure may be included as a resin component. Examples of such biodegradable resins include polysaccharide derivatives such as cellulose, starch, dextran or chitin, peptides such as collagen, casein, fibrin or gelatin, polyamino acids, polyvinyl alcohol, nylon 4 or nylon 2 / Polyamide such as nylon 6 copolymer, polyglycolic acid, polylactic acid, polysuccinic acid ester, oxalic acid ester, polyhydroxybutyric acid, polydiglycolic acid butylene, polycaprolactone or polydioxanone, which are known not to have a crystal structure Polyesters such as these may be used, and one or more of these may be mixed and engraved.

  In other words, a biodegradable polymer is an organic material that is decomposed and assimilated by the action of nature and living bodies, and is an ideal material suitable for the environment. Any material can be used as long as the object of the present invention is not impaired. Good.

  Biodegradable resins can also be produced according to known methods. Moreover, you may use a commercial item as biodegradable resin. As this commercial item, the brand name Lacty available from Toyota Motor Co., Ltd., the trade name Lacia available from Mitsui Chemicals, Inc., or the brand name Nature Works available from Cargill Dow Polymer LLC. .

  In the resin composition, only one kind of the above-described biodegradable resins may be contained, or two or more kinds of biodegradable resins may be contained. When two or more types of biodegradable resins are contained, these resins may form a copolymer or may be in a mixed state. Further, the resin composition may contain a resin other than the biodegradable resin described above. For example, a synthetic resin that does not have biodegradability may be included in the resin composition according to the present invention. Examples of the synthetic resin include polylactic acid and polybutylene succinate with a reduced decomposition rate.

  Further, the resin composition contains a predetermined compound shown in the color index issued by The Society of Dyers and Colorists as a nucleating agent.

  Specifically, examples of the predetermined compound serving as a nucleating agent include PR257 shown in Chemical Formula 1, PR147 and PY191 shown in Chemical Formula 2, PR168 shown in Chemical Formula 3, PY155 shown in Chemical Formula 4, PY191: 1 shown in Chemical Formula 5, and PR254. And PR202, PO16 shown in Chemical Formula 6, PO34 shown in Chemical Formula 7, PY55 shown in Chemical Formula 8, PR279 shown in Chemical Formula 9, PY17 shown in Chemical Formula 10, PR146 and PR184 shown in Chemical Formula 11, PR253 shown in Chemical Formula 12 PR2 shown in Chemical Formula 13, PY62 shown in Chemical Formula 14, PR22, PR211 and PR213 shown in Chemical Formula 15, PR23 and PO48 shown in Chemical Formula 16, PR238 shown in Chemical Formula 17, PY165 shown in Chemical Formula 18, PR48 shown in Chemical Formula 19: 1 PR48 shown in Chemical Formula 20: , Shown in chemical formula 21 PR48: 3, shown in chemical formula 22 PR48: 4, PY16 represented by Chemical Formula 23 and the like, using any one or more of these. In addition, the symbol in a compound name, P means Pigment, R means Red, Y means Yellow, and O means Orange.

  For PY191, PR254 and PR202 mixed crystals, PR184, PR211, PR213, and PO48, it is difficult to obtain the chemical formula from the color index issued by The Society of Dyers and Colourists, but PY191 is manufactured by Client Japan. A mixed crystal of PR254 and PR202 is obtained from a pigment manufactured by Chiba (trade name: CINQUASIA Scarlet RT-390-D), and PR211 is Dainippon Ink Co., Ltd. PR213 is obtained from Dainippon Ink Co., Ltd. (trade name: Naphthol AS Group II), and PO48 is a mixed crystal (unsubstituted quinacridone + quinacridone) from Chiba. Quinone). PR184 contains a mixture or a mixed crystal of PR146 shown in Chemical Formula 11 and PR147 shown in Chemical Formula 2, or both of them. For other compounds, PR257 is commercially available as a pigment (trade name: Hostaperm Red Violet 3RL) manufactured by Client Japan, PR147 is commercially available as a pigment (trade name: Parmanent Pink F3B) manufactured by Client Japan, and PR168 is client Japan. PY155 is commercially available as a pigment (trade name: Graphtol Yellow 3GP) manufactured by Client Japan, and PO16 is a pigment manufactured by Dainippon Ink (Symuler Fast Orange V). Are commercially available, and these can be used.

  In addition to the compound represented by the above chemical formula, the predetermined compound serving as the nucleating agent includes, for example, PB60, PBr25, PO36, PO38, PO43, and PO62 shown in the color index issued by The Society of Dyers and Colorists. , PO64, PO68, PO72, PR149, PR170, PR175, PR177, PR178, PR179, PR187, PR188, PR206, PR207, PR209, PR237, PR239, PR247, PR266, PR4, PR5, PR53: 1, PR57: 1, PR63 : 1, Mixed crystal of PR9PV19 and PR202, PV23, PV29, PV3, PV37, PY1, PY12, PY120, PY127, PY128, PY129, PY13, PY130, PY138, PY139, PY14, P 147, PY150, PY151, PY153, PY154, PY168, PY17, PY174, PY175, PY176, PY180, PY181, PY184, PY185, PY194, PY199, PY3, PY74, PY81, PY83, PY83, PY83, 95P Is mentioned.

  Furthermore, as the predetermined compound serving as a nucleating agent, for example, PB1, PB16, PB28, PB36, PB6, PB61, PB72, PB73, PB74, PBGr8, PBl1, PBl10 shown in the color index issued by The Society of Dyers and Colorists , PB11, PBl18, PBl19, PBl24, PBl25, PBl27, PBl28, PBl31, PBl32, PBl34, PBl56, PBl6, PBl61, PBl7, PBrl, PBr11, PBr24, PBr29, PBr29, PBr29, PBr29Pg , PG36, PG50, PG7, PG8, PGr10, PO1, PO13, PO15, PO16, PO17, PO17: 1, PO2, PO22, PO24, PO31, PO34, O44, PO46, PO49, PO5, PO60, PO65, PO66, PO67, PO68, PO69, PO7, PO73, PR1, PR10, PR101, PR11, PR111, PR114, PR119, PR12, PR123, PR13, PR136, PR14, PR148, PR15, PR150, PR16, PR164, PR169, PR17, PR171, PR18, PR181, PR190, PR192, PR200, PR21, PR210, PR212, PR222, PR223, PR224, PR245, PR247, PR256, PR258, PR260, PR261, PR3, PR31, PR32, PR37, PR38, PR41, PR48, PR48: 5, PR49, PR49: 1, PR49: 2, PR49: 3 , PR50: 1, PR51, PR52: 1, PR52: 2, PR53, PR53: 1, PR58: 2, PR58: 4, PR6, PR63: 2, PR64, PR64: 1, PR68, PR7, PR8, PR81: 2 , PR87, PR88, PR95, PT123, PV1, PV13, PV25, PV3, PV42, PV44, PV50, PW6, PY100, PY106, PY111, PY113, PY114, PY116, PY117, PY119, PY121, PY124, PY126, PY133, PY136 , PY152, PY166, PY169, PY170, PY171, PY172, PY177, PY179, PY183, PY188, PY190, PY2, PY214, PY3, PY42, PY49, PY5, PY53, PY 5, PY6, PY61, PY62: 1, PY63, PY65, PY73, PY75, PY87, PY90, PY94, PY98, VB14, VB20, VB29, VB4, VB5, VB6, VB125, VBr1, VBr3, VG1, VG3, VG9 VO1, VO2, VO3, VO5, VO7, VO9, VR1, VR10, VR15, VR23, VR29, VR41, VR45, VV1, VV13, VV2, VV21, VV3, VV9, VY1, VY2, VY20, and the like.

  Furthermore, as the predetermined compound as the nucleating agent, for example, PB2, PB3, PB4, PB5, PB7, PB8, PB9, PB10, PB11, PB12, PB13, shown in the color index issued by The Society of Dyers and Colorists, PB14, PB17, PB18, PB19, PB20, PB21, PB22, PB23, PB24, PB25, PB26, PB27, PB29, PB30, PB31, PB32, PB33, PB34, PB35, PB37, PB38, PB39, PB40, PB41, PB41 PB43, PB44, PB45, PB46, PB47, PB48, PB49, PB50, PB51, PB52, PB53, PB54, PB55, PB56, PB57, PB58, PB59, PB62, PB63, PB64, PB65, B66, PB67, PB68, PB69, PB70, PB71, PBl2, PBl3, PBl4, PBl5, PBl8, PBl9, PBl12, PBl13, PBl14, PBl15, PBl16, PBl17, PBl20, PBl21, PBl2P PBl33, PBl35, PBl36, PBl37, PBl38, PBl39, PBl40, PBl41, PBl42, PBl43, PBl44, PBl45, PBl46, PBl47, PBl48, PBl49, PBl50, PBl51, PBl51, Pll PBr60, PBr1, PBr2, PBr3, PBr4, PBr5, PBr6, PBr7, PBr8, PBr9, PBr10, PBr12, PBr13, PBr14, PBr15, PBr16, PBr17, PBr18, PBr19, PBr20, PBr21, PBr22, PBr23, PBr26, PBr27, PBr28, PBr30, PBr30, PBr30, PBr30, PBr30 PG6, PG9, PG10, PG11, PG13, PG14, PG15, PG16, PG18, PG19, PG20, PG21, PG22, PG23, PG24, PG25, PG27, PG28, PG29, PG30, PG31, PG32, PG33, PG34, PG35, PG37, PG38, PG39, PG40, PG41, PG42, PG43, PG44, PG45, PG46, PG47, PG48, PG49, PO3, O4, PO6, PO8, PO9, PO10, PO11, PO12, PO14, PO18, PO19, PO20, PO21, PO23, PO25, PO26, PO27, PO28, PO29, PO30, PO32, PO33, PO35, PO37, PO39, PO40, PO41, PO42, PO45, PO47, PO50, PO51, PO52, PO53, PO54, PO55, PO56, PO57, PO58, PO59, PO63, PO70, PR19, PR20, PR24, PR25, PR26, PR27, PR28, PR29, PR30, PR33, PR34, PR35, PR36, PR39, PR40, PR42, PR43, PR44, PR45, PR46, PR47, PR50, PR51, PR52, PR54, PR55, PR 6, PR57, PR58, PR59, PR60, PR61, PR62, PR63, PR65, PR66, PR67, PR69, PR70, PR71, PR72, PR73, PR74, PR75, PR76, PR77, PR78, PR79, PR80, PR81, PR82, PR83, PR84, PR85, PR86, PR87, PR89, PR90, PR91, PR92, PR93, PR94, PR96, PR97, PR98, PR99, PR100, PR102, PR103, PR104, PR105, PR106, PR107, PR108, PR109, PR110, PR113, PR115, PR116, PR117, PR118, PR120, PR121, PR124, PR125, PR126, PR127, PR128, PR12 9, PR130, PR131, PR132, PR133, PR134, PR135, PR137, PR138, PR139, PR140, PR141, PR142, PR143, PR145, PR151, PR152, PR153, PR154, PR155, PR156, PR157, PR158, PR159, PR160, PR161, PR162, PR163, PR165, PR167, PR172, PR173, PR174, PR182, PR183, PR186, PR189, PR191, PR277, PR278, PV2, PV4, PV5, PV6, PV7, PV8, PV9, PV10, PV11, PV12, PV14, PV15, PV16, PV17, PV18, PV20, PV21, PV22, PV24, PV26, PV27 PV28, PV30, PV31, PV32, PV33, PV34, PV35, PV39, PV38, PV39, PV40, PV41, PV43, PV45, PV46, PV47, PV48, PV49, PW1, PW2, PW3, PW4, PW5, PY4, PY7, PRY, PR193, PR194, PR195, PR196, PR197, PR198, PR199, PR199, PR201, PR203, PR204, PR205, PR215, PR216, PR217, PR218, PR219, PR225, PR226, PR227, PR228, PR229, PR230, PR231, PR232, PR233, PR234, PR235, PR236, PR240, PR241, PR243, PR244, PR246, PR248, PR249, R250, PR251, PR252, PR259, PR263, PR265, PR267, PR268, PR269, PR270, PR271, PR273, PR274, PR275, PR276, PY9, PY10, PY11, PY12, PY13, PY14, PY15, PY17, PY18, YY PY20, PY21, PY22, PY23, PY24, PY25, PY26, PY27, PY28, PY29, PY30, PY31, PY32, PY33, PY34, PY35, PY36, PY37, PY38, PY39, PY40, PY41, PY43, PY44, PY44 PY46, PY47, PY48, PY50, PY51, PY52, PY54, PY55, PY56, PY57, PY58, PY59, PY60, PY64, PY66, PY67, PY68, PY69, PY70, PY71, PY72, PY76, PY77, PY78, PY79, PY80, PY82, PY84, PY85, PY86, PY88, PY89, PY91, PY92, PY96, PY99, PY101, PY102, PY101 PY104, PY105, PY107, PY108, PY112, PY115, PY118, PY122, PY123, PY125, PY131, PY132, PY134, PY135, PY137, PY140, PY141, PY142, PY143, PY144, PY145, PY146, PY149, PY146, PY148 PY157, PY158, PY159, PY160, PY161, PY162, PY163, PY164, PY167, P 178, PY182, PY186, PY187, PY189, PY192, PY193, PY195, PY196, PY197, PY198, PY200, PY201, PY202, PY203, PY204, PY205, PY206, PY207, PY208, PY209Y, PY208, PY209, PY13P SR1, SR2, SR3, SR4, SR5, SR6, SR7, SR8, SR9, SR10, SR11, SR12, SR13, SR14, SR15, SR16, SR17, SR18, SR19, SR20, SR21, SR22, SR23, SR24, SR25, SR26, SR27, SR28, SR29, SR30, SR31, SR32, SR33, SR34, SR35, SR36, SR37, SR38, SR3 SR40, SR41, SR42, SR43, SR44, SR45, SR46, SR47, SR48, SR49, SR50, SR51, SR52, SR53, SR54, SR55, SR56, SR57, SR58, SR59, SR60, SR61, SR62, SR63, SR64 SR65, SR66, SR67, SR68, SR69, SR70, SR71, SR72, SR73, SR74, SR75, SR76, SR77, SR78, SR79, SR80, SR81, SR82, SR83, SR84, SR85, SR86, SR87, SR88, SR89 SR90, SR91, SR92, SR93, SR94, SR95, SR96, SR97, SR98, SR99, SR100, SR101, SR102, SR103, SR104, SR 105, SR106, SR107, SR108, SR109, SR110, SR111, SR112, SR113, SR114, SR115, SR116, SR117, SR118, SR119, SR120, SR121, SR122, SR123, SR124, SR125, SR126, SR127, SR128, SR129, SR130, SR131, SR132, SR133, SR134, VB7, VB8, VB9, VB10, VB11, VB12, VB13, VB15, VB16, VB17, VB18, VB19, VB21, VB22, VB23, VB24, VB25, VB26, VB27, VB28, VBl1, VBl2, VBl3, VBl4, VBl5, VBl6, VBl7, VBl8, VBl9, VBl10, VBl11, V l12, VBl13, VBl14, VBl15, VBl16, VBl17, VBl18, VBl19, VBl20, VBl21, VBl22, VBl23, VBl24, VBr2, VG2, VG4, VG5, VG6, VG7, VG8, VO4, V3 VR4, VR5, VR6, VR7, VR8, VR9, VR11, VR12, VR13, VR14, VR16, VR17, VR18, VR19, VR20, VR21, VR22, VR24, VR25, VR26, VR27, VR28, VR30, VR31, VR31 VR33, VR34, VR35, VR36, VR37, VR38, VR39, VR40, VR42, VR43, VR44, VV2, VV4, VV5, VV6, VV7, VV8, VV11, VV12 VV13, VV14, VV16, VV17, VV18, VV19, VV20, VV21, VV22, VV24, VV25, VV26, VV27, VV28, VV30, VV31, VV32, VV33, VV34, VV35, VV36, VV37, VV38, VV39, VV38, VV39 VV42, VV43, VV44, VY3, VY4, VY5, VY6, VY7, VY8, VY9, VY10, VY11, VY12, VY13, VY14, VY15, VY16, VY17, VY18, VY19 and the like. The symbols P, R, Y, and O in the compound name have been described above, but the other symbols have the following meanings. The first letter V means Vat, S means Solvent, and the second letter B means Blue, Br means Brown, Bl means Black, G means Green, V means Violet, and W means white. Although not listed here, in addition to those shown above, there are also coloring materials in which the first character is represented by A, R, F, etc., which are also nucleating agents. The first letter A means Acid, the first letter R means Reactive, and F means Food.

  Also, FB1, FB2, FB3, FB4, FB5, FB6, FB7, FB8, FB9, FB10, FB11, FB12, FB13, FB14, FB15, FB16, FB17, FB18, FB19, FB20, FB21, FB22, FB23, FB24 FB25, FB26, FB27, FB28, FB29, FB30, FB31, FB32, FB33, FB34, FB35, FB36, FB37, FB38, FB39, FB40, FB41, FB42, FB43, FB44, FB45, FB46, FB47, FB48, F47 FB50, FB51, FB52, FB53, FB54, FB55, FB56, FB57, FB58, FB59, FB60, FB61, FB62, FB63, FB64, FB65, FB66, FB67, FB68 FB69, FB70, FB71, FB72, FB73, FB74, FB75, FB76, FB77, FB78, FB79, FB80, FB81, FB82, FB83, FB84, FB85, FB86, FB87, FB88, FB89, FB90, FB91, FB92, FB FB94, FB95, FB96, FB97, FB98, FB99, FB100, FB101, FB102, FB103, FB104, FB105, FB106, FB107, FB108, FB109, FB110, FB111, FB112, FB113, FB114, FB115, FB116, FB117 FB119, FB120, FB121, FB122, FB123, FB124, FB125, FB126, FB127, FB128, FB1 9, FB130, FB131, FB132, FB133, FB134, FB135, FB136, FB137, FB138, FB139, FB140, FB141, FB142, FB143, FB144, FB145, FB146, FB147, FB148, 1503 FB154, FB155, FB156, FB157, FB158, FB159, FB160, FB161, FB162, FB163, FB164, FB165, FB166, FB167, FB168, FB169, FB170, FB171, FB17, F17, B17, F17 FB179, FB180, FB181, FB182, FB183, FB184, F B185, FB186, FB187, FB188, FB189, FB190, FB191, FB192, FB193, FB194, FB195, FB196, FB197, FB198, FB199, FB200, FB201, FB202, FB203, FB204, FB205, FB204, FB205 FB 210, FB 211, FB 212, FB 213, FB 214, FB 215, FB 216, FB 217, FB 218, FB 219, FB 220, FB 221, FB 222, FB 223, FB 224, FB 225, FB 226, FB 227, B 228, FB 228, FB 229, B FB235, FB236, FB237, FB238, FB239, FB24 , FB241, FB242, FB243, FB244, FB245, FB246, FB247, FB248, FB249, FB250, FB251, FB252, FB253, FB254, FB255, FB256, FB257, F258, FB259, , FB266, FB267, FB268, FB269, FB270, FB271, FB272, FB273, FB274, FB275, FB276, FB277, FB278, FB279, FB280, FB281, FB282, FB283, , FB291, FB292, FB293, FB294, FB295, F 296, FB297, FB298, FB299, FB300, FB301, FB302, FB303, FB304, FB305, FB306, FB307, FB308, FB309, FB310, FB311, FB312, FB313, FB314, FB315, B3F, 319 FB321, FB322, FB323, FB324, FB325, FB326, FB327, FB328, FB329, FB330, FB331, FB332, FB333, FB334, FB335, FB336, FB337, F343, FB338, FB339, 34 FB346, FB347, FB348, FB349, FB350, FB351 , FB 352, FB 353, FB 354, FB 355, FB 356, FB 357, FB 358, FB 359, FB 360, FB 361, FB 362, FB 363, FB 364, FB 365, FB 366, FB 367, FB 368, FB 370, 37 , FB377, FB378, FB379, FB380, FB381, FB382, FB383, FB384, FB385, FB386, FB387, FB388, FB389, FB390, FB391, FB392, FB393 and the like. However, FB means Fluorescent Brightener.

  In the compounds described in the color index issued by The Society of Dyers and Colorists, the crystal structure is changed even when the aromatic ring is substituted with a chemically acceptable range of substituents. It can be used as a nucleating agent for promoting crystallization of possible polyester. Moreover, when the aromatic ring of these compounds already has a substituent, a compound in which the substituent is substituted with another substituent can also be used as a nucleating agent.

Specifically, examples of such a substituent include a halogen atom (for example, fluorine, chlorine, bromine or iodine), nitro group, cyano group, hydroxy group, thiol group, sulfo group, sulfino group, mercapto group, phosphono group. For example, a linear or branched alkyl group (for example, methyl group, ethyl group, isopropyl group, n-propyl group, n-butyl group, isobutyl group, second butyl group, third butyl group, pentyl group, hexyl group) , Heptyl group, octyl group, nonyl group, decyl group, undecyl group, dodecyl group, tridecyl group, tetradecyl group, pentadecyl group, hexadecyl group, heptadecyl group, octadecyl group, nonadecyl group or eicosyl group), hydroxyalkyl group (for example, Hydrogycimethyl, hydroxyethyl, 1-hydroxyisopropyl, 1 Loxy-n-propyl group, 2-hydroxy-n-butyl group or 1-hydroxy-isobutyl group), halogenoalkyl group (for example, chloromethyl, dichloromethyl, trichloromethyl, fluoromethyl, difluoromethyl, trifluoromethyl, 2 -Bromoethyl, 2,2,2-trifluoroethyl, pentafluoroethyl, 3,3,3-trifluoropropyl, 4,4,4-trifluorobutyl, 5,5,5-trifluoropentyl or 6,6 , 6-trifluorohexyl etc.), cycloalkyl group (eg cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl or cycloheptyl etc.), alkenyl group (eg vinyl, crotyl, 2-pentenyl or 3-hexenyl etc.), cycloalkenyl group (eg For example 2-cyclopentenyl, 2 Cyclohexenyl, 2-cyclopentenylmethyl or 2-cyclohexenylmethyl, etc.), alkynyl groups (eg ethynyl, 1-propynyl, 2-propynyl, 1-butynyl, 2-pentynyl or 3-hexynyl), oxo groups, thioxo groups An amidino group, an imino group, an alkylenedioxy group (for example, methylenedioxy or ethylenedioxy), an aromatic monocyclic or aromatic condensed cyclic hydrocarbon group such as phenyl or biphenyl, a 1-adamantyl group or 2- Aromatic hydrocarbon groups such as bridged cyclic hydrocarbon groups such as norbornanyl, alkoxy groups (eg methoxy, ethoxy, propoxy, isopropoxy, butoxy, isobutoxy, sec-butoxy, tert-butoxy, pentyloxy, neopentyloxy or hexyl) Oxy), alkyl Thio group (eg methylthio, ethylthio, propylthio, isopropylthio, butylthio, isobutylthio, pentylthio or hexylthio), carboxyl group, alkanoyl group (eg formyl; acetyl, propionyl, butyryl or isobutyryl etc.), alkanoyloxy group (eg formyloxy) An alkyl-carbonyloxy group such as acetyloxy, propionyloxy, butyryloxy or isobutyryloxy), an alkoxycarbonyl group (such as methoxycarbonyl, ethoxycarbonyl, propoxycarbonyl or butoxycarbonyl), an aralkyloxycarbonyl group (such as benzyloxy); Carbonyl), thiocarbamoyl group, alkylsulfinyl group (for example, methylsulfinyl or ethylsulfinyl) An alkylsulfonyl group (eg, methylsulfonyl, ethylsulfonyl or butylsulfonyl), a sulfamoyl group, a monoalkylsulfamoyl group (eg, methylsulfamoyl or ethylsulfamoyl), a dialkylsulfamoyl group (eg, dimethylsulfamoyl) Or diethylsulfamoyl etc.), arylsulfamoyl group (eg phenylsulfamoyl or naphthylsulfamoyl etc.), aryl group (eg phenyl or naphthyl etc.), aryloxy group (eg phenyloxy or naphthyloxy etc.), An arylthio group (such as phenylthio or naphthylthio), an arylsulfinyl group (such as phenylsulfinyl or naphthylsulfinyl), an arylsulfonyl group (such as phenylsulfonyl or naphthyl) Sulfonyl etc.), arylcarbonyl group (eg benzoyl or naphthoyl etc.), arylcarbonyloxy group (eg benzoyloxy or naphthoyloxy etc.), optionally halogenated alkylcarbonylamino group (eg acetylamino or trifluoroacetylamino) ), An optionally substituted carbamoyl group (for example, a group represented by the formula —CONR1R2). However, in formula, R1 and R2 are a hydrogen atom, the hydrocarbon group which may have a substituent, or the heterocyclic group which may have a substituent, respectively. R1 and R2 may form a ring together with the adjacent nitrogen atom. ), An amino group which may have a substituent (for example, amino, alkylamino, tetrahydropyrrole, piperazine, piperidine, morpholine, thiomorpholine, pyrrole or imidazole), an ureido group which may have a substituent ( For example, a group represented by the chemical formula —NHCONR1R2, where R1 and R2 are each a hydrogen atom, a hydrocarbon group that may have a substituent, or a heterocyclic group that may have a substituent. R1 and R2 may form a ring together with the adjacent nitrogen atom.) A carboxamide group (for example, a group represented by the chemical formula —NR1COR2), wherein R1 And R2 are each a hydrogen atom, a hydrocarbon group which may have a substituent, or a heterocyclic group which may have a substituent. 1 and R2 may form a ring together with the adjacent nitrogen atom.), A group represented which may have a substituent sulfonamide group (e.g., by chemical formula -NR1SO 2 _R2. In the formula, R1 and R2 Are a hydrogen atom, a hydrocarbon group which may have a substituent, or a heterocyclic group which may have a substituent, and R1 and R2 may form a ring together with the adjacent nitrogen atom. Or a hydroxyl group or a mercapto group which may have a substituent, or a heterocyclic group which may have a substituent (for example, an atom (ring atom) constituting a ring system is oxygen in addition to a carbon atom) An aromatic heterocyclic group containing at least one heteroatom selected from atoms, sulfur atoms, nitrogen atoms, etc. Specifically, pyridyl, furyl, thiazolyl, saturated or unsaturated aliphatic heterocyclic group, etc. ) Or these devices The substituent etc. which substituted the substituent as much as chemically permitted are mentioned.

  Moreover, in the resin composition, for example, an inorganic filler may be added in addition to the above-described polyester and nucleating agent. Thereby, in a resin composition, heat resistance, rigidity, etc. can be improved, for example.

  The inorganic filler may be a known one, and examples thereof include talc, alumina, silica, magnesia, mica, kaolin and the like, and any one or more of these can be used. Among them, talc is more preferable because it has an effect of promoting crystallization of polyester without canceling out its action and effect even when used in combination with the above-described nucleating agent.

  Moreover, it is preferable that 1-50 mass parts is added with respect to 100 mass parts of polyesters which can take a crystal structure as an inorganic filler.

  When the addition amount of the inorganic filler with respect to 100 parts by mass of the polyester is less than 1 part by mass, the effect of increasing the heat resistance and rigidity of the resin composition obtained by adding the inorganic filler because the addition amount of the inorganic filler is too small. It becomes difficult to plan. On the other hand, when the addition amount of the inorganic filler with respect to 100 parts by mass of the polyester is more than 50 parts by mass, the addition amount of the inorganic filler is too large and the resin composition may be weakened. Therefore, adding an inorganic filler in the range of 1 to 50 parts by mass with respect to 100 parts by mass of the polyester can increase the heat resistance and rigidity of the resin composition and prevent the resin composition from becoming brittle. .

  In the resin composition, for example, a hydrolysis inhibitor may be added in addition to the above-described polyester and nucleating agent. Thereby, in a resin composition, hydrolysis of polyester is suppressed and long-term reliability in use of a molded article can be improved.

The hydrolysis inhibitor is not limited as long as it can inhibit hydrolysis of polyester, particularly biodegradable resin, and examples thereof include compounds having reactivity with active hydrogen in the biodegradable resin. By adding such a compound as a hydrolysis inhibiting paint, the amount of active hydrogen in the biodegradable resin is reduced in the resin composition, and the active hydrogen hydrolyzes the polymer chain constituting the biodegradable resin catalytically. Decomposition can be prevented. The active hydrogen here means hydrogen in a bond (N—H bond or O—H bond) of oxygen, nitrogen or the like and hydrogen, and this active hydrogen is a bond of carbon and hydrogen (C—H). Reactivity is higher than hydrogen in bond). Specifically, for example, hydrogen in a carboxyl group (—COOH), a hydroxyl group (—OH), an amino group (—NH ₂ ), an amide bond (—NHCO—) or the like in the biodegradable resin is active hydrogen.

  Specifically, examples of the hydrolysis inhibitor include carbodiimide compounds, isocyanate compounds, oxazoline compounds, and the like, and one or more of these can be used. In particular, a carbodiimide compound is more preferable because it can be easily melt-kneaded with a biodegradable resin, and hydrolysis of the biodegradable resin can be effectively suppressed with a small amount of addition.

  The carbodiimide compound used as a hydrolysis inhibitor is a compound having one or more carbodiimide groups in the molecule, and includes a polycarbodiimide compound and the like. Examples of the monocarbodiimide compound contained in this carbodiimide compound include dicyclohexylcarbodiimide, diisopropylcarbodiimide, dimethylcarbodiimide, diisobutylcarbodiimide, dioctylcarbodiimide, diphenylcarbodiimide, naphthylcarbodiimide, and among them, it is particularly easily industrially available. It is preferable to use dicyclohexylcarbodiimide, diisopropylcarbodiimide or the like.

  Examples of the isocyanate compound serving as a hydrolysis inhibitor include 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, m-phenylene diisocyanate, p-phenylene diisocyanate, 4,4′-diphenylmethane diisocyanate, and 2,4 ′. -Diphenylmethane diisocyanate, 2,2'-diphenylmethane diisocyanate, 3,3'-dimethyl-4,4'-biphenylene diisocyanate, 3,3'-dimethoxy-4,4'-biphenylene diisocyanate, 3,3'-dichloro-4 , 4'-biphenylene diisocyanate, 1,5-naphthalene diisocyanate, 1,5-tetrahydronaphthalene diisocyanate, tetramethylene diisocyanate, 1,6-hexamethylene diisocyanate, dodecame Diisocyanate, trimethylhexamethylene diisocyanate, 1,3-cyclohexylene diisocyanate, 1,4-cyclohexylene diisocyanate, xylylene diisocyanate, tetramethylxylylene diisocyanate, hydrogenated xylylene diisocyanate, lysine diisocyanate, isophorone diisocyanate, 4,4 ' -Dicyclohexylmethane diisocyanate, 3,3'-dimethyl-4,4'-dicyclohexylmethane diisocyanate, etc. are mentioned.

  Examples of the oxazoline-based compound that serves as a hydrolysis inhibitor include 2,2′-o-phenylenebis (2-oxazoline), 2,2′-m-phenylenebis (2-oxazoline), and 2,2′-p-. Phenylenebis (2-oxazoline), 2,2′-p-phenylenebis (4-methyl-2-oxazoline), 2,2′-m-phenylenebis (4-methyl-2-oxazoline), 2,2 ′ -P-phenylenebis (4,4'-dimethyl-2-oxazoline), 2,2'-m-phenylenebis (4,4'-dimethyl-2-oxazoline), 2,2'-ethylenebis (2- Oxazoline), 2,2'-tetramethylenebis (2-oxazoline), 2,2'-hexamethylenebis (2-oxazoline), 2,2'-octamethylenebis (2-oxazoline), 2 2'-ethylene bis (4-methyl-2-oxazoline), 2,2'-diphenylenebis (2-oxazoline).

  And the hydrolysis inhibitor mentioned above can be easily manufactured according to a well-known method, and it is possible to use a commercial item suitably.

  In the hydrolysis inhibitor, since the biodegradation rate of the resin composition can be adjusted depending on the type and addition amount, the type and addition amount to be added may be determined according to the target product. Specifically, the addition amount of the hydrolysis inhibitor is about 5% by mass or less, preferably about 1% by mass or less with respect to the total mass of the resin composition.

  In the resin composition, for example, an antioxidant, a light stabilizer, an ultraviolet absorber, a pigment, a colorant, an antistatic agent, a release agent, a perfume A lubricant, a flame retardant, a filler, an antibacterial and antifungal agent and the like can be added as necessary.

  The resin composition can be produced by mixing the above-described polyester capable of taking the crystal structure, the above-described nucleating agent, and the above-described other materials. A preferable production method includes, for example, a method in which a raw material polyester is mixed with a nucleating agent, an inorganic filler, a hydrolysis inhibitor, and the like and melt-kneaded using an extruder. In addition to this, the resin composition can also be produced by, for example, a solution method. The solution method here is a method in which each component and solvent as raw materials are stirred well to form a slurry using an arbitrary solvent capable of dispersing and dissolving each component, and the solvent is removed by a known method such as drying. It is. In addition, as a method of manufacturing a resin composition, it is not restrict | limited to these methods, The conventionally well-known methods other than these can also be used.

In other words, in the resin composition, it is important that the compound serving as the nucleating agent is dispersed almost uniformly and finely in the polyester capable of taking a crystal structure. In order to disperse substantially uniformly, a conventionally known method may be used. For example, a method of dispersing and coloring a pigment in a resin, a method of using three rolls, a method of repeating simple heat-kneading a plurality of times, and the like can be mentioned.

  Specifically, in order to disperse the compound serving as the nucleating agent in the polyester substantially uniformly, first, a pellet made of polyester capable of taking a crystal structure such as polylactic acid is dried under reduced pressure at 60 ° C. for 5 hours, for example. Next, a predetermined amount of the polyester pellets and the compound serving as a nucleating agent are weighed and mixed with a mixer or the like. Next, the mixture is heated and kneaded using, for example, a twin-screw kneader, and after the heating and kneading, the kneaded product is cut into pellets and dried with hot air. In this way, it is possible to obtain a resin composition in which a compound serving as a nucleating agent is dispersed almost uniformly in polyester. In addition, the pellet made of polyester that can take a crystal structure such as polylactic acid is not limited to vacuum drying as described above, and for example, hot air drying at a temperature of 80 ° C. for 12 hours may be performed. It is preferable to perform drying.

In the resin composition having the above-described configuration, the predetermined compound shown in the color index issued by The Society of Dyers and Colorists is added as a nucleating agent, not as a pigment, to polyester, particularly biodegradable polyester. Thus, it can appropriately act as a nucleating agent for the biodegradable polyester and can greatly promote the crystallization of the polyester.

  Thereby, in the resin composition, when the resin molded product is formed using the resin composition, since the biodegradable polyester is highly crystallized, the degree of crystallinity of the biodegradable polyester is increased and rigidity is increased. The moldability and heat resistance can be improved.

  In other words, the resin composition can improve the problem of deformation at about 60 ° C. without heat resistance, which has been a problem when a resin molded product is formed as in the prior art. For example, rigidity (elasticity) around 80 ° C. The heat resistance and rigidity can be sufficiently increased such that the rate) can be 100 MPa or more.

  Moreover, since the resin composition is also excellent in transparency, it can be applied to a wide range. Furthermore, since the resin composition is decomposed in the natural environment after disposal, it is preferable in terms of conservation of the global environment.

In the resin composition described above, the Society of Dyers and used as a nucleating agent
The predetermined compound shown in the color index issued by Colorists is preferably in the form of particles having a particle size of 10 μm or less, more preferably in the form of particles having a particle size of 1 μm or less. In the resin composition, the blending ratio of the nucleating agent in the composition is preferably in the range of 0.001 to 10 parts by weight with respect to 100 parts by weight of the polyester capable of taking a crystal structure, and more preferably 0. More preferably, it is in the range of 0.01 parts by weight to 1 part by weight.

  Here, the optimum range of the content and particle size of the nucleating agent will be described below.

  When there are two resin compositions here and the contents of the nucleating agent are substantially the same, the smaller the particle size of the nucleating agent, the higher the effect. This is because the smaller the particle size of the nucleating agent, the larger the number of nucleating agent particles in the resin composition, and the number of nuclei increases to make the crystals finer. In this case, when the particle size of the nucleating agent is halved, the volume of one nucleating agent particle is ８, so the number of particles is eight times. That is, if the particle size is halved, the same effect can be expected even if the addition amount is 1/8. For example, when a nucleating agent having substantially the same particle size is contained, it is apparent that the effect of the nucleating agent increases as the amount added increases.

  Based on the above, the optimum range of the particle size and content of the nucleating agent will be described in more detail.

  Here, a simple model is considered and the following is assumed. (1) For simplification of calculation, the densities of the polyester and the nucleating agent that can take a crystal structure are substantially the same. (2) The nucleating agent particles are not aggregated at all and are completely uniformly dispersed in the resin composition, that is, the nucleating agent is present in a cubic lattice form in the composition. (3) Polyester crystals that can take on a crystal structure are cubic. (4) Similarly, the nucleating agent particles are also cubic. (5) One resin crystal is generated from one nucleating agent. (6) Polylactic acid is a polyester capable of taking a crystal structure.

  Based on the above assumption, the crystal size of polylactic acid can be determined by volume calculation from the content (%) of the nucleating agent and the particle size of the nucleating agent. The results are shown in Table 1.

  Specifically, when polylactic acid, which is a polyester capable of taking a crystal structure, contains a nucleating agent, for example, the size (length of one side) of the nucleating agent is 0.05 μm, and the addition amount of the nucleating agent is 0.5. %, And the size of the polylactic acid crystal is X μm. Since X3 × 0.005 = 0.053, the size of the polylactic acid crystal is calculated to be 0.29 μm.

When the nucleating agent is actually contained in the resin molded product, the particle size and content of the nucleating agent should be selected according to the purpose with reference to the volume calculation as described above. That's fine.

  For example, consider a case where the polyester capable of taking a crystal structure is polylactic acid, the crystallization temperature is 120 ° C., and the crystallization time is desired to be within about 1 minute. According to literatures and experiments by the inventors, the growth rate (dr / dt) of the radius (r) of polylactic acid at this temperature is about 2 μm / min. Here, as a further assumption, the growth rate of the radius of the spherulite is assumed to be substantially the same as the growth rate of the cubic-shaped crystal assumed above. Then, the time required for crystallization can be calculated. The results are shown in Table 2.

  For example, when the particle size of the nucleating agent is 1 μm and the addition amount is 1%, the crystallization time is calculated as 70 seconds.

  And in a resin composition, it is preferable that a nucleating agent contains 0.001 weight part-10 weight part with respect to 100 mass parts of polyester which can take a crystal structure.

  When the content of the nucleating agent with respect to 100 parts by mass of the polyester is less than 0.001 part by mass, the content of the nucleating agent is too small, and the effect of promoting the crystallization of the polyester can be obtained by including the nucleating agent. It becomes difficult. On the other hand, when the content of the nucleating agent with respect to 100 parts by mass of the polyester is more than 50 parts by mass, the content of the nucleating agent is too large, and mechanical properties such as rigidity of the resin composition may be deteriorated. Therefore, the addition of the nucleating agent in the range of 0.001 to 10 parts by mass with respect to 100 parts by mass of the polyester promotes the crystallization of the polyester and deteriorates the mechanical properties of the resin composition. Can be prevented.

  For example, when 10 parts by mass of a nucleating agent having a particle diameter of 10 μm is contained in polylactic acid and crystallized at 120 ° C., it can be seen from Table 2 above that the time required for crystallization is about 5 minutes. That is, when polylactic acid is crystallized in a mold having a mold temperature set to about 120 ° C. with an injection molding machine, it is estimated that the time required for crystallization will be 5 minutes. On the other hand, the resin stays in a high-temperature molten state in the cylinder of the molding machine, but the polylactic acid may be thermally decomposed, so that the residence time in the mold is set to within 5 minutes. Therefore, the inclusion of 10 parts by mass of a nucleating agent having a particle size of 10 μm with respect to polylactic acid is a boundary condition that satisfies the optimum range of the nucleating agent content described above.

  In the nucleating agent, when the particle size is small, aggregation occurs, the dispersibility to the polyester capable of taking a crystal structure is deteriorated, and there is a possibility that the particle size is unevenly distributed and the substantial particle size is increased. Depending on the type of nucleating agent, the particle size can be relatively easily dispersed in the resin with little aggregation if the particle size is about 0.5 μm. When polylactic acid is crystallized using a nucleating agent having a particle size of 0.5 μm, in order to reduce the time required for crystallization from Table 2 to about 5 minutes, the lower limit of the content of the nucleating agent is polylactic acid 100. It turns out that it is 0.001 mass part with respect to a mass part. Of course, depending on the kind of the nucleating agent, even if the particle size is smaller than 0.5 μm, the aggregation may be small, and in this case, the content can be further reduced. Or when using a nucleating agent of a smaller size, dispersion | distribution of the nucleating agent to resin can be improved by using some aggregation preventing agent, and content can also be decreased.

  The optimal range of nucleating agent content and particle size explained above is a calculation estimate based on a number of assumptions. Actually, the nucleating agent aggregates or does not disperse substantially uniformly in the polyester. To do. For this reason, it is expected that it is necessary to increase the content of the nucleating agent relative to the polyester from the calculation results shown in Table 3. However, the content of the nucleating agent is 1 in consideration of the decrease in mechanical properties of the resin composition. More preferably, it is about%. Therefore, in a resin composition, the effect by a nucleating agent can further be heightened by making the addition amount of a nucleating agent into the range of 0.01 mass part-1 mass part with respect to 100 mass parts of polyester.

  In the resin composition, the crystallization temperature is higher than the crystallization temperature of normal polyester and approaches the melting point, that is, the supercooling is reduced. For this reason, the resin composition exhibits the property of being easily crystallized. Specifically, in the resin composition, the crystallization temperature can be set within −55 ° C. of the melting point.

  And in the resin composition demonstrated above, it becomes a resin molded product which consists of a polyester-type resin composition etc. by attaching | subjecting to a heating process and a filling holding process.

The heating process performed when producing a resin molded product from the resin composition may be any process as long as the resin composition can be heated and melted. Examples of the heating means used in the heating step include known means using a heater or the like. The heating temperature is usually about + 10 ° C. to + 50 ° C. of the melting point of the resin composition, and preferably about + 15 ° C. to + 30 ° C. higher than the melting point of the resin composition. The melting point is a value measured by a differential scanning calorimeter (DSC) or the like. Specifically, when obtaining the melting point, for example, 3 to 4 mg of the resin composition is cut out,
Put it in an aluminum pan and use it as a sample. The sample is heated to 200 ° C, cooled to 0 ° C at a rate of 50 ° C / min, and then increased at a rate of temperature increase of 20 ° C / min. By performing DSC measurement while warming, the temperature is obtained as an endothermic peak temperature around 160 ° C., for example.

  The filling and holding step may be any step as long as the melt of the resin composition after the heating step can be filled and held in the mold. The mold may be any mold as long as it is kept at a temperature within a temperature range of about −50 to + 30 ° C. of the crystallization temperature of the resin composition, and in particular, the type of mold, etc. It is not limited. The mold heat retaining means may be a known means, and examples of the heat retaining means include a means using a heater and a thermostat.

  In producing a resin molded product from the resin composition, the temperature of the mold is usually about -50 of the crystallization temperature of the resin composition from the viewpoint of crystallization of the resin composition and prevention of thermal deformation of the molded product. The temperature is within the temperature range of ˜ + 30 ° C., preferably about 90-140 ° C. As described above, the crystallization temperature can be measured by DSC measurement. Specifically, when determining the crystallization temperature, for example, 3 to 4 mg of the resin composition is cut out, put into an aluminum pan, used as a sample, the sample is once heated to 200 ° C., and cooled to 0 ° C. at 20 ° C./min. By performing DSC measurement, the temperature of the exothermic peak near 120 ° C. is obtained, for example.

  When the resin composition is composed of a plurality of kinds of polyesters, a plurality of endothermic peaks and a plurality of exothermic peaks due to the origin may be measured in the DSC measurement. In this case, the melting point of this resin composition is the endothermic peak temperature derived from the main one (polyester with the highest content) of those polyesters, and the crystallization temperature is also the exothermic peak derived from the main polyester. Let it be temperature.

  In the filling and holding step, the melt of the resin composition is filled into the mold, and the melt of the resin composition is higher than the heat retention temperature of the mold, but approaches the heat retention temperature as time passes. The filling means may be any means as long as the mold can be filled with the melt of the resin composition, and may be a known means.

  For example, a means for injecting a melt into a mold by pressure can be used. The cooling means may be any means as long as it can cool the melt of the resin composition, and may be a known means. The cooling may be any cooling as long as the melt of the resin composition is cooled, and is not particularly limited such as a cooling time. Rapid cooling or slow cooling may be used. The cooling means may be a known means such as a cooling means or a rapid cooling means using water, ice, ice water, dry ice, liquid nitrogen, or the like.

  From the viewpoint of crystallization and productivity of the resin composition, the filling and holding time is more preferably about 10 seconds to 4 minutes, and most preferably about 20 seconds to 1 minute. Then, as soon as the crystallization of the resin composition is completed, the molded product is removed from the mold. Further, the molded product may be taken out from the mold even when crystallization is in progress. This is because if the crystallization proceeds to some extent, the elastic modulus is improved, and the molded product of the resin composition may be taken out of the mold without deformation. At this time, crystallization of the molded product after the mold release further proceeds due to the residual heat, and the crystallization is almost saturated before being cooled to room temperature.

  After the filling and holding step, the temperature of the molded product when taking out the molded product from the mold is preferably as low as possible. As a means for lowering the temperature of the molded product, for example, a means for spraying cold air on the molded product when the mold is opened may be mentioned. Thus, the deformation | transformation risk of a molded article is improved by making the temperature of a molded article low. Examples of the method for producing a resin molded product from the resin composition include casting method, compression method, transfer method, injection method, extrusion method, inflation method, calendering method, blowing method, vacuum method, laminating method, spraying method. Known molding methods such as the up method, the foaming method, the matched die method, and the SMC method are applied. When forming a resin molded product by such a molding method, it is preferable to use a known molding machine such as an injection molding machine.

  Here, the method for producing a resin molded product from the resin composition will be described more specifically. First, the resin composition is heated and melted at a temperature about +15 to + 30 ° C. higher than the melting point of the resin composition using a known injection molding machine. Next, the melt of the resin composition is injected into a mold kept at a temperature in the temperature range of −50 to + 30 ° C. of the crystallization temperature of the resin composition. Next, after injection, pressure is continuously applied to the melt in the mold as desired to compensate for so-called “sinks”. Then release the pressure and leave. This standing time is called normal cooling time. Of course, heat is gradually taken away from the resin to the mold during the holding time, and the temperature of the resin in the mold gradually decreases. Therefore, in practice, the holding time may be included in the cooling time. Here, as is generally said, the standing time after releasing the holding pressure is referred to as cooling. The injection pressure speed, injection pressure, injection time, holding pressure, holding time, etc. are appropriately set depending on the type of resin of the resin composition, the shape of the mold, and the like. The cooling time may be a cooling time sufficient for the crystallization of the resin molded into the mold shape to be almost saturated, and is usually about 1 minute or less, preferably about 20 seconds to 1 minute.

  In addition, a polyester that can take a crystal structure by filling and holding a melt of the resin composition in a mold that is kept at a temperature in the temperature range of −50 to + 30 ° C. of the crystallization temperature of the resin composition. Can be rapidly crystallized. As a result, the molding cycle can be shortened, the productivity can be improved, and the yield can be improved.

  In the above explanation, the main purpose is to crystallize the resin at the time of molding. However, the other two problems can be solved, and these problems will be described in more detail below.

  Normally, the temperature of the mold is kept at a temperature equal to or lower than the Tg of the resin. When the resin is injected into the mold at such a temperature, the heat of the injected resin is quickly taken away into the mold, It becomes difficult to flow in the mold. For this reason, a flow mark is generated in the molded product, and the weld becomes very conspicuous.

  Also, since the resin does not flow easily, when molding with a complicated mold, the number of gates must be increased to ensure that the resin is filled into the mold. For this reason, runners are generated by the number of gates, and the resin is wasted correspondingly.

  On the other hand, the mold temperature in the above method is higher than the mold temperature of the prior art. Therefore, the heat taken away from the resin injected into the mold is smaller than that in the prior art, and the flowability of the resin in the mold is better than that in the prior art. For this reason, problems of flow marks and welds are less likely to occur. In addition, the number of gates can be reduced as compared with the prior art, and less resin is wasted on the runner.

  In addition, the method of manufacturing the resin molded product from the resin composition is not limited to the above-described method, and the mold may be molded at a temperature lower than the temperature according to a normal method. For example, when the polyester capable of taking a crystal structure is polylactic acid, it may be molded by a usual method such as setting the mold temperature of Tg of 60 ° C. or lower to 50 ° C., for example. In this case, in order to ensure heat resistance, it is necessary to crystallize the polyester by heat treatment after molding. However, in the resin composition, crystallization can be promoted by a nucleating agent, so that the conventional resin composition is crystallized. The heat treatment time required for this is shorter and the yield can be improved. In addition, when it is not necessary to focus on crystallization of polyester which can take a crystal structure, it is not necessary to heat-process.

  The resin composition described above can be widely used for various molded articles. In addition, a resin molded product formed by injection molding or the like of this resin composition is excellent in rigidity because the resin composition has high crystallinity, and can also have high transparency. Suitable for demanding products.

  Specifically, resin molded products include, for example, generators, motors, transformers, current transformers, voltage regulators, rectifiers, inverters, relays, power contacts, switches, machine breakers, knife switches, etc. Electric rod parts, electrical parts cabinets, light sockets, various terminal boards, plugs, power modules and other electrical equipment parts, sensors, LED lamps, connectors, resistors, relay cases, small switches, coil bobbins, capacitors, variable capacitor cases, optical pickups, Oscillator, transformer, printed circuit board, tuner, speaker, microphone, headphones, floppy disk (registered trademark) disk or MO disk storage device, small motor, magnetic head base, semiconductor, liquid crystal, FDD carriage, FDD chassis, inkjet printer Or thermal transfer printer etc. Electronic parts typified by printers, motor brush holders, parabolic antennas or computer-related parts, VTR parts, TV parts, casings of electrical or electronic equipment such as TVs or personal computers, irons, hair dryers, rice cooker parts, microwave ovens Parts, audio products or audio equipment parts such as audio / laser discs / compact discs, lighting parts, freezer parts, air conditioner parts, typewriter parts, word processor parts, etc. Telephone-related parts, facsimile-related parts, copier-related parts, cleaning jigs, motor parts, machine-related parts typified by lighters or typewriters, optical equipment typified by microscopes, binoculars, cameras or watches, Precision machine related parts, Alternator terminals, alternator connectors, IC regulators, various valves such as potentiometer bases for light deiers or exhaust gas valves, fuel-related / exhaust / intake system pipes, air intake nozzles snorkel, intake manifold, fuel pump, engine cooling Water joint, carburetor main body, carburetor spacer, exhaust gas sensor, cooling water sensor, oil temperature sensor, brake pad wear sensor, throttle position sensor, crankshaft position sensor, air flow meter, brake pad wear sensor, thermostat base for air conditioner, Wind flow control valve for heating, brush holder for radiator motor, water pump impeller, turbine Bain, wiper motor related parts, detributor, starter switch, starter relay, transmission wire harness, window washer nozzle, air conditioner panel switch base, coil for fuel related electromagnetic valve, connector for fuse, horn terminal, electrical component insulation plate, Examples include step motor rotors, lamp sockets, lamp reflectors, lamp housings, brake pistons, solenoid bobbins, engine oil filters, automobile / vehicle-related parts such as ignition device cases, and packaging materials. Especially, since this resin molded product has improved crystallinity, it is suitable to be used as a casing of an electric or electronic device such as a television or a personal computer that requires high heat resistance. In addition, since this resin molded product is mainly composed of aliphatic polyester, particularly polylactic acid, it can be disposed of after biodegradation after use, and has the advantage that no extra energy is consumed for disposal. Yes.

  Hereinafter, examples of actually producing a resin composition to which the present invention is applied and comparative examples produced for comparison will be described.

<Example 1>
In Example 1, as a polyester capable of taking a crystal structure, 100 parts by mass of polylactic acid (trade name: H100J) manufactured by Mitsui Chemicals, Inc. is shown in a color index issued by The Society of Dyers and Colorists, which is a nucleating agent. After mixing so that PR257 (trade name: Hostaperm Red Violet 3RL, manufactured by Client Japan Co., Ltd.) is contained in an amount of 0.5 parts by mass as the predetermined compound, kneading while heating at a heating temperature in the range of 160 ° C. to 180 ° C. Pelletized. Thus, the resin composition of Example 1 was produced. The molecular weight of the polylactic acid used here was 200,000.

<Example 2>
In Example 2, as described above except that PR147 (trade name: Parmanent Pink F3B, manufactured by Client Japan Co., Ltd.) was used as a predetermined compound shown in the color index issued by The Society of Dyers and Colorists, which is a nucleating agent. A resin composition was prepared in the same manner as in Example 1.

<Example 3>
In Example 3, as described above, except that PY191 (trade name: PV Fast Yellow HGR, manufactured by Client Japan Co., Ltd.) was used as the predetermined compound shown in the color index issued by The Society of Dyers and Colorists as a nucleating agent. A resin composition was prepared in the same manner as in Example 1.

<Example 4>
In Example 4, except that PR168 (manufactured by Client Japan, trade name: Hostaperm Scarlex GO transp.) Was used as a predetermined compound shown in the color index issued by The Society of Dyers and Colorists, which is a nucleating agent. A resin composition was prepared in the same manner as in Example 1 described above.

<Example 5>
In Example 5, as described above except that PY16 (manufactured by Client Japan, trade name: Parmanent Yellow NCG) was used as a predetermined compound shown in the color index issued by The Society of Dyers and Colorists as a nucleating agent. A resin composition was prepared in the same manner as in Example 1.
The crystallization temperature was 118.3 ° C.

<Comparative example 1>
In Comparative Example 1, only polylactic acid without containing a nucleating agent was heated and kneaded in the same manner as in Example 1 and then pelletized. Thus, the resin composition of Comparative Example 1 was produced.

<Comparative example 2>
In Comparative Example 2, a resin composition was prepared in the same manner as in Example 1 described above except that 0.5 part by mass of calcium stearate manufactured by Kanto Chemical Co., Inc. was used instead of the predetermined compound serving as the nucleating agent. .

<Comparative Example 3>
In Comparative Example 3, a resin was obtained in the same manner as in Example 1 except that 25 parts by mass of talc (trade name: LMS-200) manufactured by Fuji Talc Co. was included instead of the predetermined compound serving as a nucleating agent. A composition was prepared.

  And about each Example and each comparative example, the crystallization temperature was measured by the differential scanning calorific value (DSC) measuring method. Specifically, to measure the crystallization temperature for each example and each comparative example, first, 3 mg to 4 mg of each resin composition obtained as described above was cut out, and this test piece was put in an aluminum pan. A test sample was prepared. And after heating this test sample to 200 degreeC once and cooling it so that 20 degreeC temperature might fall per minute, the exothermic peak temperature by crystallization of about 120 degreeC was measured as crystallization temperature.

  The results of measuring the crystallization temperature of each example and each comparative example are shown in Table 3.

  From the evaluation results shown in Table 3, in each example in which the predetermined compound shown in the color index issued by The Society of Dyers and Colorists was included as a nucleating agent, each comparative example in which the predetermined nucleating agent was not included It can be seen that the crystallization temperature is higher and the crystallinity is increased.

  In particular, in Comparative Example 1 consisting only of polylactic acid, it can be seen that no exothermic peak was observed by the DSC measurement method, and polylactic acid was solidified without being crystallized. In addition, as in Comparative Example 2 and Comparative Example 3, it is possible to raise the crystallization temperature to some extent by adding calcium stearate or talc to polylactic acid, but the color index issued by The Society of Dyers and Colorists. It can be seen that this is far from the case where the predetermined compound shown in the above is contained in polylactic acid as a nucleating agent.

From the above, when preparing a resin composition, polylactic acid containing a predetermined compound shown in the color index issued by The Society of Dyers and Colorists as a nucleating agent increases the crystallization temperature and causes crystallization. It can be seen that it is very important in obtaining a resin composition having an increased degree of conversion.

Claims (15)

Polyester capable of taking a crystal structure;
Containing the compounds shown in the color index published by The Society of Dyers and Colorists,
The above compounds are PR257, PR147, PY191, PR168, PY155, PY191: 1, mixed crystals of PR254 and PR202, PO16, PO34, PY55, PR279, PY17, PR146, PR184, PR253, PR2, PY62, PR22, PR211, A resin composition comprising one or more of PR213, PR23, PO48, PR238, PY165, PR48: 1, PR48: 2, PR48: 3, PR48: 4, and PY16.
(However, P means Pigment, R means Red, Y means Yellow, and O means Orange.)   The resin composition according to claim 1, wherein the particle size of the compound is 1 µm or less.   The resin composition according to claim 1, wherein the polyester is a biodegradable polyester.   The resin composition according to claim 3, wherein the biodegradable polyester is polylactic acid.   The resin composition according to claim 1, wherein the compound is contained in an amount of 0.001 to 10 parts by mass with respect to 100 parts by mass of the polyester.   The resin composition according to claim 1, wherein the compound is contained in an amount of 0.01 to 1 part by mass with respect to 100 parts by mass of the polyester.   The resin composition according to claim 1, wherein an inorganic filler is contained in addition to the polyester and the compound.   The resin composition according to claim 7, wherein the inorganic filler is talc.   The resin composition according to claim 7, wherein the inorganic filler is contained in an amount of 1 to 50 parts by mass with respect to 100 parts by mass of the polyester.   2. The resin composition according to claim 1, wherein a hydrolysis inhibitor is contained in addition to the polyester and the compound.   The resin composition according to claim 10, wherein the hydrolysis inhibitor contains a compound having a carbodiimide group.   2. The resin composition according to claim 1, wherein the crystallization temperature is in the range of -55 [deg.] C. to the melting point of the resin composition. In a resin molded product formed by molding a resin composition containing a polyester having a crystal structure and a compound shown in the color index issued by The Society of Dyers and Colorists,
The above compounds are PR257, PR147, PY191, PR168, PY155, PY191: 1, mixed crystals of PR254 and PR202, PO16, PO34, PY55, PR279, PY17, PR146, PR184, PR253, PR2, PY62, PR22, PR211, A resin molded product comprising one or more of PR213, PR23, PO48, PR238, PY165, PR48: 1, PR48: 2, PR48: 3, PR48: 4, and PY16.
(However, P means Pigment, R means Red, Y means Yellow, and O means Orange.)   The resin molded product according to claim 13, which is a casing of an electric device or an electronic device. A polyester nucleating agent containing a compound shown in the color index issued by The Society of Dyers and Colorists, and crystallizing a polyester capable of taking a crystal structure,
The above compounds are PR257, PR147, PY191, PR168, PY155, PY191: 1, mixed crystals of PR254 and PR202, PO16, PO34, PY55, PR279, PY17, PR146, PR184, PR253, PR2, PY62, PR22, PR211, A polyester nucleating agent comprising one or more of PR213, PR23, PO48, PR238, PY165, PR48: 1, PR48: 2, PR48: 3, PR48: 4, and PY16.
(However, P means Pigment, R means Red, Y means Yellow, and O means Orange.)