JP2010260999A - Resin composition and molding - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin composition that is excellent in heat resistance, flame retardancy, and impact resistance when molded. <P>SOLUTION: The resin composition includes at least (A) polylactic acid, (B) glass fibers to which surfaces an epoxy treatment is performed, (C) a phosphate, and (D) a polyfunctional compound having a functional group which reacts with a terminal group of the polylactic acid. It is desired that the melting point of the phosphate is 200°C or higher, that the composition is kneaded at the temperature condition of 150-190°C, and that the phosphate exists around the glass fibers. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a resin composition and a molded body.

  Conventionally, high-molecular materials such as polystyrene, polystyrene-ABS resin copolymer, polycarbonate, polyester, polyphenylene sulfide, polyacetal, etc. have been used for parts of electric products and electronic / electric equipment, especially heat resistance, mechanical strength, especially electronic / electrical. In the case of equipment parts, it has been used because of its excellent maintenance of mechanical strength against environmental fluctuations.

In recent years, from the viewpoint of environmental problems, instead of the above-mentioned polymer materials, polylactic acid is a plant-derived material that has low CO ₂ emissions, uses less petroleum, which is a depleted resource, and has low environmental impact Studies using resin materials have been made.
For the purpose of improving the impact resistance of a resin containing polylactic acid, a resin composition comprising polylactic acid, a specific thermoplastic resin, and a graft copolymer is known (see, for example, Patent Document 1).
Further, it is composed of a mixture of a resin containing polylactic acid as a main component, glass fiber as a filler, and a phosphoric acid flame retardant as an additive, and the resin includes polybutylene terephthalate in addition to polylactic acid as the main component. A resin composition containing only the above is known (for example, see Patent Document 2).

JP 2005-320409 A Japanese Patent No. 3971289

  An object of the present invention is to provide a resin composition that is superior in heat resistance, flame retardancy, and impact resistance when formed into a molded body as compared with a system using polylactic acid, glass fiber, and phosphate alone or in combination. It is to be.

The above problem is solved by the following means. That is,
The invention according to claim 1
At least (A) polylactic acid, (B) glass fiber whose surface is epoxy-treated, (C) phosphate, and (D) a polyfunctional compound having a functional group that reacts with a terminal group of the polylactic acid, A resin composition comprising:

The invention according to claim 2
The resin composition according to claim 1, wherein the phosphate has a melting point of 200 ° C. or higher.

The invention according to claim 3
At least (A) the polylactic acid, (B) the glass fiber, (C) the phosphate, and (D) the polyfunctional compound are kneaded under a temperature condition of 150 ° C. or higher and 190 ° C. or lower. The resin composition of Claim 2 obtained.

The invention according to claim 4
The resin composition according to claim 1, wherein (B) the phosphate is present around the glass fiber.

The invention according to claim 5
The molded object obtained by shape | molding the resin composition of any one of Claims 1-4.

According to the first aspect of the present invention, a resin having excellent heat resistance, flame retardancy, and impact resistance when formed into a molded body, compared to a system in which polylactic acid, glass fiber, and phosphate are used alone or in combination. A composition is provided.
According to the second aspect of the present invention, there is provided a resin composition having excellent heat resistance, flame retardancy, and impact resistance when formed into a molded body as compared with the case where the melting point of phosphate is less than 200 ° C. Is done.
According to the invention of claim 3, there is provided a resin composition that is superior in heat resistance, flame retardancy, and impact resistance when formed into a molded body as compared with a case where the temperature condition for kneading does not satisfy this configuration. The
According to the invention which concerns on Claim 4, when it makes a molded object compared with the type | system | group which does not have a phosphate around glass fiber, the resin composition which is excellent in both heat resistance, a flame retardance, and impact resistance is provided. Is done.
The invention according to claim 5 provides a molded article that is superior in heat resistance, flame retardancy, and impact resistance as compared with the case without this configuration.

It is a schematic diagram which shows an example of the components of an electronic / electric equipment provided with the molded object of this embodiment. 2 is a diagram showing an SEM photograph (200 times) of a test piece produced in Example 1. FIG. 6 is a view showing an SEM photograph (200 times) of a test piece produced in Comparative Example 1. FIG. 2 is a diagram showing an SEM photograph (5,000 times) of a test piece produced in Example 1. FIG.

  Embodiments that are examples of the present invention will be described below.

≪Resin composition≫
The resin composition according to the present embodiment reacts at least with (A) polylactic acid, (B) glass fiber whose surface is epoxy-treated, (C) phosphate, and (D) end groups of polylactic acid. And a polyfunctional compound having a functional group.

Polylactic acid is a plant-derived material that is known as a material with low environmental impact CO ₂ emissions, low consumption of petroleum as a depleted resource, and low environmental impact. It is known that the flame resistance and impact resistance are low. It is also known that heat resistance is improved by adding glass fiber to polylactic acid, and flame retardancy is improved by adding phosphate to polylactic acid.

  On the other hand, the resin composition according to the present embodiment comprises (A) polylactic acid, (B) glass fiber whose surface is epoxy-treated, (C) phosphate, and (D) polylactic acid. By blending with a polyfunctional compound having a functional group that reacts with the terminal group, both heat resistance, flame retardancy, and impact resistance are all compared to systems using polylactic acid, glass fiber, and phosphate alone or in combination. An excellent molded body can be obtained. In this resin composition containing polylactic acid as the main raw material, the reason why high heat resistance and flame retardancy are improved and high impact resistance is realized is not clear. This is probably because the polyfunctional compound having a group not only reacts with the terminal group of polylactic acid but also acts on glass fiber and phosphate to improve the dispersion state of glass fiber and phosphate.

  In particular, in the resin composition according to the present embodiment, the glass fiber and phosphate also act to improve the dispersion state of the glass fiber and phosphate, so that phosphate exists around the glass fiber. It is considered that it is easy to obtain a molded body having excellent heat resistance, flame retardancy, and impact resistance by having such a structure (see FIG. 2).

  Hereinafter, each component contained in the resin composition according to the present embodiment will be described.

<(A) Polylactic acid>
Polylactic acid is derived from plants and has an effect of reducing environmental burden, specifically, reducing CO ₂ emissions and oil consumption.
The polylactic acid is not particularly limited as long as it is a condensate of lactic acid, and may be L lactic acid, D lactic acid, or a mixture of them by copolymerization or blending.
As the polylactic acid, a synthesized product or a commercially available product may be used. Examples of the commercially available products include Terramac TE4000 manufactured by Unitika Ltd., and Lacia H100 manufactured by Mitsui Chemicals.
Polylactic acid may be used individually by 1 type, and may use 2 or more types together.

  The molecular weight of polylactic acid is not particularly limited, but is preferably 30,000 to 200,000, more preferably 50,000 to 150,000 in terms of weight average molecular weight. When the weight average molecular weight is less than 30000, the low-temperature mechanical strength tends to decrease, and when it exceeds 200000, the flexibility tends to decrease.

The content of polylactic acid (total content when two or more are used in combination) is not particularly limited, but from the viewpoint of reducing the environmental load, it is 30% by mass or more and 90% by mass with respect to the total amount of the resin composition. Or less, more preferably 40% by mass or more and 80% by mass or less, and particularly preferably 50% by mass or more and 80% by mass or less.

<(B) Glass fiber>
The glass fiber has a surface treated with an epoxy-based treatment agent. Here, the glass fiber is not subjected to surface treatment or applied with a surface treatment with a treatment agent other than an epoxy treatment agent (for example, a silicon treatment agent, an acrylic treatment agent, etc.). It does not act with a polyfunctional compound, the dispersion state of the glass fiber is lowered, heat resistance is insufficient, and flame retardancy is also deteriorated.

As an epoxy-type processing agent which surface-treats glass fiber, a bisphenol type | mold epoxy processing agent, a phenol type epoxy processing agent, a siloxane modified epoxy processing agent etc. are mentioned, for example.
For example, the treatment amount with the epoxy treating agent is preferably 0.01% or more and 5% or less, and more preferably 0.1% or more and 3% or less.

  The diameter of the glass fiber is preferably 6 μm or more and 15 μm or less, and more preferably 8 μm or more and 10 μm or less. If the diameter of the glass fiber is less than 6 μm, the heat resistance tends to be insufficient. If the glass fiber diameter exceeds 15 μm, it may be difficult to act with the polyfunctional compound, but the dispersibility may be deteriorated, and the flame retardancy tends to decrease.

  The fiber length of the glass fiber is preferably 1 mm or more and 4 mm or less, and more preferably 2 mm or more and 3 mm or less. If the fiber length of the glass fiber is less than 1 mm, the heat resistance tends to decrease, and if it exceeds 4 mm, the dispersibility tends to decrease and the flame retardancy tends to decrease.

  The glass fiber content (total content when two or more types are used in combination) is not particularly limited, but is preferably 3% by mass or more and 20% by mass or less with respect to the total amount of the resin composition. % To 15% by mass, more preferably 5% to 10% by mass.

<(C) Phosphate>
There is no restriction | limiting in particular as a phosphate, Both organic phosphate and inorganic phosphate are mentioned.
Examples of the organic phosphate include ammonium phosphate, melamine phosphate, and guanidine phosphate.
Examples of the inorganic phosphate include aluminum phosphate, magnesium phosphate, and manganese phosphate.
Among these, an organic phosphate, particularly ammonium polyphosphate is preferable. This phosphate is preferable because the effect of improving dispersion by the polyfunctional compound is large.
A phosphate may be used individually by 1 type, and may use 2 or more types together.

  The melting point of the phosphate is preferably 200 ° C or higher, more preferably 210 ° C or higher and 300 or lower, and further preferably 220 ° C or higher and 280 ° C or lower. If the melting point of the phosphate is less than 200 ° C., the phosphate may be dissolved in the polylactic acid during kneading, so that it is difficult to act with the polyfunctional compound and the dispersibility tends to decrease. For this reason, when the melting point of the phosphate is 200 ° C. or more, it becomes easy to obtain a molded article having excellent heat resistance, flame retardancy, and impact resistance.

  In the phosphate, the phosphorus (P) content is preferably 15% by mass or more and 40% by mass or less, and more preferably 20% by mass or more and 35% by mass or less. If the phosphorus content of the phosphate is less than 15% by mass, the flame retardancy tends to decrease, and if it exceeds 40% by mass, the aliphatic polyester tends to be thermally decomposed.

  The phosphate content (total content when two or more are used in combination) is not particularly limited, but is preferably 5% by mass or more and 40% by mass or less based on the total amount of the resin composition. The content is more preferably no less than 30% by mass and no greater than 30% by mass, and particularly preferably no less than 10% by mass and no greater than 20% by mass.

<(D) polyfunctional compound>
The polyfunctional compound is a compound having two or more functional groups that react with terminal groups (for example, carboxyl group, hydroxyl group, etc.) of polylactic acid.
Examples of the polyfunctional compound having a functional group that reacts with the terminal group of polylactic acid include a carbodiimide compound, a dicarboxylic acid compound, a diol compound, a hydroxycarboxylic acid compound, and an epoxy compound.
Examples of the carbodiimide compound include aliphatic monocarbodiimide, aliphatic dicarbodiimide, aromatic monocarbodiimide, aromatic dicarbodiimide, and the like.
Examples of the dicarboxylic acid compound include succinic acid, adipic acid, sebacic acid, and the like.
Examples of the diol compound include ethylene glycol, propylene glycol, bisphenol A, and the like.
Examples of the hydroxycarboxylic acid compound include lactic acid, 3-hydroxybutyric acid, 6-hydroxyhexanoic acid and the like.
Examples of the epoxy compound include bisphenol type epoxy and novolac type epoxy.
Among these, as the polyfunctional compound, a bifunctional compound (polyfunctional compound having two functional groups), particularly a bifunctional carbodiimide compound is preferable. This polyfunctional compound is preferable because of its high effect of improving the dispersibility of glass fiber and phosphate.
A polyfunctional compound may be used individually by 1 type, and may use 2 or more types together.

  The content of the polyfunctional compound (total content when two or more are used in combination) is not particularly limited, but is preferably 0.1% by mass or more and 3% by mass or less with respect to the total amount of the resin composition. The content is more preferably 0.5% by mass or more and 2% by mass or less, and particularly preferably 1% by mass or more and 1.5% by mass or less.

<Other ingredients>
The resin composition according to the present embodiment may contain a compound having a siloxane structure (siloxane compound). The addition of a compound having a siloxane structure is preferable because it tends to improve flame retardancy.
The compound having a siloxane structure is not particularly limited as long as it is a compound having a siloxane structure (Si-0) in the molecular structure, and examples thereof include polydimethylsiloxane, dihydroxypolysiloxane, and octamethylcyclotetrasiloxane. .

  The content of the compound having a siloxane structure is not particularly limited, but from the viewpoint of heat resistance and flame retardancy, it may be from 0.5% by mass to 10% by mass with respect to the total amount of the resin composition. Preferably, it is 1 mass% or more and 7 mass% or less.

The resin composition according to this embodiment may contain other fillers.
Examples of other fillers include clay, talc, mica, and montmorillonite. Other fillers include melamine-containing particles, phosphate particles, titanium oxide and the like.
Other fillers may be used alone or in combination of two or more.

  The particle diameter of the filler is preferably 0.01 μm or more and 5 μm or less, and more preferably 0.05 μm or more and 2 μm or less in terms of number average particle diameter. When the thickness is less than 0.01 μm, the filling effect may be insufficient. When the thickness exceeds 5 μm, the dispersion may be deteriorated, and in any case, the heat resistance improving effect tends to decrease.

As the other filler, a synthesized product or a commercially available product may be used. Moreover, you may use a natural thing.
As a commercial product of clay, Nanoclay MX manufactured by Nanocore Corporation and the like can be mentioned.
As a commercially available product of talc, there is Microace P8 manufactured by Nippon Talc.
Examples of commercially available mica include mica powder manufactured by Nippon Mica Seisakusho, Yamaguchi Mica Industry SJ-005, SYA21-RS, and the like.
As a commercial item of montmorillonite, Kunimine F Co., Ltd. Kunipia F etc. are mentioned.
For example, as the other fillers, those previously blended with a commercially available polylactic acid may be applied.

  The content of other fillers is not particularly limited, but from the viewpoint of heat resistance and flame retardancy, it is preferably 1% by mass or more and 50% by mass or less with respect to the total amount of the resin composition, and 3% by mass. % To 20% by mass is more preferable.

In addition, the resin composition according to the present embodiment may contain other flame retardants.
Other flame retardants include silicone flame retardants, nitrogen flame retardants, inorganic hydroxide flame retardants, and the like.
Other flame retardants may be used alone or in combination of two or more.

As other flame retardants, synthesized products or commercially available products may be used.
Examples of commercially available phosphorus-based flame retardants include PX-200 and PX-202 manufactured by Daihachi Chemical, TERRAJU C80 manufactured by Bütenheim, EXOLIT AP422 and EXOLIT OP930 manufactured by Clariant, and the like.
Examples of commercially available silicone flame retardants include Toray Dow Silicone DC4-7081.
Examples of commercially available nitrogen-based flame retardants include Apinon 901 manufactured by Sanwa Chemical, Pyrroline Sanmelamine manufactured by Shimonoseki Mitsui Chemicals, and FP2100 manufactured by ADEKA.
Examples of commercially available inorganic hydroxide flame retardants include MGZ300 manufactured by Sakai Chemical Industry, B103ST manufactured by Nippon Light Metal.

  The content of the other flame retardant is not particularly limited, but is preferably 2% by mass or more and 20% by mass or less with respect to the total amount of the resin composition from the viewpoint of flame retardancy and impact strength. % To 15% by mass is more preferable.

  Moreover, the resin composition of this embodiment may contain a mold release agent, a weather resistance agent, a light resistance agent, a colorant, and the like.

<Production method of resin composition>
The resin composition according to this embodiment is prepared by kneading the components (A) to (D) and other components as necessary.
The kneading is performed, for example, using a known kneading apparatus such as a biaxial kneading apparatus (Toshiba Machine, TEM58SS), a simple kneader (Toyo Seiki, Labo Plast Mill).
Here, the kneading temperature condition (cylinder temperature condition) is preferably less than the melting point of the phosphate. Specifically, when applying a phosphate having a melting point of 200 ° C. or higher, 150 ° C. or higher and 190 ° C. ° C or lower is preferable, and 160 ° C or higher and 180 ° C or lower is more preferable. Thereby, it is suppressed that the phosphate is dissolved in the polylactic acid at the time of kneading, and it becomes easy to obtain a molded article having excellent heat resistance, flame retardancy, and impact resistance.

≪Molded body≫
The molded body of the present embodiment can be obtained by molding the resin composition of the present embodiment described above. For example, the molded body according to the present embodiment is obtained by molding by a molding method such as injection molding, extrusion molding, blow molding, or hot press molding. In the present embodiment, it is preferable that the resin composition of the present embodiment is obtained by injection molding because of the dispersibility of components (for example, glass fibers and phosphates) in the molded body.
The injection molding is performed using, for example, a commercially available apparatus such as NEX150 manufactured by Nissei Plastic Industry, NEX70000 manufactured by Nissei Plastic Industry, SE50D manufactured by Toshiba Machine.
In this case, the cylinder temperature is preferably 160 ° C. or higher and 240 ° C. or lower, and more preferably 170 ° C. or higher and 210 ° C. or lower, from the viewpoint of suppressing decomposition of polylactic acid.
The mold temperature is preferably 30 ° C. or higher and 120 ° C. or lower, more preferably 30 ° C. or higher and 60 ° C. or lower, from the viewpoint of productivity.

Further, the crystallinity of (A) polylactic acid in the molded body of this embodiment is preferably 20% or more. If the crystallinity is less than 20%, the heat resistance is lowered.
Here, the crystallinity indicates a value measured by a density gradient tube method. Specifically, standard test pieces having a crystallinity of 100% and 0% are suspended in a density gradient tube made of a mixed system of two kinds of alcohols. The density can be determined from the floating position of these two types of standard test pieces, and a calibration curve of density and crystallinity is created. Next, the sample specimen (with the same volume as the standard specimen) whose crystallinity is to be measured is suspended in this density gradient tube, the density is obtained from the floating position, and the crystallinity is obtained from the calibration curve. Points to the value.

≪Parts of electronic and electrical equipment≫
Since the molded body of the above-described embodiment can be excellent in mechanical strength (impact resistance and flexibility), heat resistance and flame retardancy, electronic / electric equipment, home appliances, containers, automobile interior materials It can use suitably for uses, such as. More specifically, housings such as home appliances and electronic / electrical equipment, various parts, wrapping films, storage cases such as CD-ROMs and DVDs, tableware, food trays, beverage bottles, chemical wrap materials, etc. Especially, it is suitable for parts of electronic / electric equipment. Many parts of electronic and electrical equipment have complicated shapes, and are heavy, so extremely high impact strength and surface impact strength are required. However, according to the resin molded body of this embodiment, Thus, such required characteristics can be sufficiently satisfied.

FIG. 1 is a schematic diagram illustrating an example of a component of an electronic / electric device including the molded body of the present embodiment. This figure is an external perspective view of an image forming apparatus, which is an example of a component of an electronic / electric apparatus provided with the molded body of this embodiment, as viewed from the front side.
The image forming apparatus 100 in FIG. 1 includes front covers 120 a and 120 b on the front surface of the main body device 110. These front covers 120a and 120b can be freely opened and closed so that an operator can operate the inside of the apparatus. Thus, the operator replenishes the toner when the toner is exhausted, replaces the exhausted process cartridge, or removes the jammed paper when a paper jam occurs in the apparatus. FIG. 1 shows the apparatus with the front covers 120a and 120b opened.

  On the upper surface of the main body 110, there are provided an operation panel 130 on which various conditions relating to image formation such as a paper size and the number of copies are input by an operation of an operator, and a copy glass 132 on which a document to be read is placed. Yes. In addition, the main body device 110 includes an automatic document conveying device 134 that conveys a document on the copy glass 132 at the top thereof. Further, main device 110 includes an image reading device that scans a document image placed on copy glass 132 and obtains image data representing the document image. Image data obtained by the image reading apparatus is sent to the image forming unit via the control unit. Note that the image reading device and the control unit are housed in a housing 150 that forms part of the main body device 110. The image forming unit is provided in the housing 150 as a detachable process cartridge 142. The process cartridge 142 is attached and detached by turning the operation lever 144.

  A toner container 146 is attached to the casing 150 of the main body device 110, and toner is replenished from the toner supply port 148. The toner stored in the toner storage unit 146 is supplied to the developing device.

  On the other hand, sheet storage cassettes 140a, 140b, and 140c are provided at the lower portion of the main unit 110. In addition, the main body apparatus 110 has a plurality of conveying rollers formed of a pair of rollers arranged in the apparatus, thereby forming a conveying path through which the sheets of the sheet storage cassette are conveyed to the upper image forming unit. ing. The paper in each paper storage cassette is taken out one by one by a paper take-out mechanism disposed near the end of the transport path and sent out to the transport path. Further, a manual paper supply unit 136 is provided on a side surface of the main apparatus 110, and paper is supplied from here.

  The paper on which the image is formed by the image forming unit is sequentially transferred between two fixing rolls that are supported by a casing 152 that forms part of the main body device 110 and is in contact with each other. Paper is discharged to the outside. The main body device 110 is provided with a plurality of paper discharge sections 138 on the side opposite to the side where the paper supply section 136 is provided, and the paper after image formation is discharged to these paper discharge sections.

In the image forming apparatus 100, for example, the front covers 120a and 120b, the exterior of the process cartridge 142, the office equipment members such as the casing 150 and the casing 152 have various performances such as heat resistance, impact resistance, and flame retardancy. Is required.
For this reason, the molded object produced using the resin composition of this embodiment is used suitably as components of these electronic / electrical devices.

  EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples.

[Example 1 to Example 17, Comparative Example 1 to Comparative Example 10]
<Preparation of resin composition>
The materials shown in Table 1 and Table 2 were kneaded at a specific composition ratio in a biaxial kneading apparatus (Toshiba Machine, TEM58SS) under the cylinder temperature conditions shown in Tables 3 and 4, and Tables 1 and 2 Resin composition pellets having the composition described were obtained.

<Production of molded body>
The resin composition pellets obtained above were dried at 80 ° C. for 8 hours, and then injection molded at the cylinder temperature and mold temperature shown in Tables 3 and 4 with an injection molding machine (NEX150, manufactured by Nissei Plastic Industry). Then, a test piece used in the following measurements and evaluations was produced as a molded body.

<Measurement / Evaluation>
The following measurements and evaluations were performed using the obtained test pieces. Tables 3 and 4 show the results.

(Measure Charpy impact strength)
An ISO multi-purpose dumbbell specimen (supporting ISO 527 tensile test and ISO 178 bending test, test part thickness 4 mm, width 10 mm) is processed, and Charpy impact resistance is measured with an impact resistance test device (Toyo Seiki, DG-5) according to ISO 179 The strength was measured.
The Charpy impact strength indicates that the larger the value, the better the impact resistance.

(Measurement of heat distortion temperature)
Using the ISO multipurpose dumbbell test piece, the heat deformation temperature (load deflection temperature) under a load of 1.80 MPa was measured according to ISO75.
The heat distortion temperature indicates that the higher the temperature, the better the heat resistance.

(UL-V test)
Using a UL test piece (thickness 1.6 mm) for V test in UL-94, a UL-V test was performed by the method of UL-94.
The UL-V test results show that V-0 has the highest flame retardancy, V-1 has the second highest flame retardancy, and V-2 has the second highest flame retardance. Show. V-not indicates inferior flame retardancy than V-2.

(Rigid ball drop test)
A flat plate having a thickness of 2 mm and 10 × 10 cm was used as a test piece, and a steel ball having a diameter of 50 mm and a weight of 500 g was dropped on the flat plate from a height of 1300 m to investigate whether or not a crack occurred.

(Scanning electron microscope observation)
A sample piece for observation with a scanning electron microscope was prepared from the ISO multipurpose dumbbell test piece and observed with a scanning electron microscope (SEM). However, this scanning electron microscope (SEM) was performed only for the ones produced in Example 1 and Comparative Example 1. The SEM photograph (magnification 200 times) of the test piece produced in Example 1 is shown in FIG. 2, and the SEM photograph (magnification 200 times) of the test piece produced in Comparative Example 1 is shown in FIG. Moreover, the SEM photograph (magnification 5000 times) of the test piece produced in Example 1 is shown in FIG.

In addition, the detail of each component in the said Table 1 and Table 2 is shown below.
(Polylactic acid)
-Terramac TE4000: manufactured by Unitika Ltd.-Terramac TE7000: manufactured by Unitika Ltd., 1% nanoclay-containing polylactic acid (polybutylene succinate)
・ Bionole 3000: Showa Polymer Co., Ltd. (phosphate compound)
EXOLITAP 422: ammonium polyphosphate (phosphate, melting point 220 ° C.), manufactured by Clariant Co., Ltd. EXOLIT930: aluminum phosphate (phosphate, melting point 240 ° C.), manufactured by Clariant Co., Ltd. TPP: condensed phosphate ester (melting point 130 ° C.) , Manufactured by Daihachi Chemical Industry Co., Ltd. Sodium monophosphate (phosphate, melting point 140 ° C.), manufactured by Phosphorous Chemical Industry Co., Ltd. (glass fiber)
FT592: Epoxy-treated glass fiber (fiber diameter 13.5 mm / fiber length 3 mm), manufactured by Owens Corning CS3PE-941SS: Epoxy-treated glass fiber (fiber diameter 6.5 mm / fiber length 3 mm), Nittobo Manufactured by CS3PE-941: silicon-treated glass fiber (fiber diameter 5 mm / fiber length 3 mm), manufactured by Nittobo Co., Ltd. (polyvalent functional compound)
Carbodilite LA-1: Bifunctional carbodiimide compound, manufactured by Nisshinbo Co., Ltd. Epicoat 802: Bifunctional epoxy resin, manufactured by Japan Epoxy Resin Co., Ltd. (siloxane compound)
Metabrene SX005: Silicone-acrylic composite rubber, manufactured by Mitsubishi Rayon Co.

From the above Tables 3 to 4, it can be seen that in this example, the Charpy impact strength, the heat distortion temperature, the UL-V test, and the hard ball drop test were all good compared to the comparative example.
2 and 3, in Example 1, compared with Comparative Example 1, the flame retardant (glass fiber and phosphoric acid compound (phosphate): white crush in the figure) hardly aggregates and is finely divided. It can be seen that they are dispersed.
Moreover, from FIG. 4, in Example 1, the phosphoric acid compound (phosphate) has adhered to the circumference | surroundings of glass fiber, and the phosphoric acid compound (phosphate) exists around glass fiber. I understand that.

DESCRIPTION OF SYMBOLS 100 Image forming apparatus 110 Main body apparatus 120a, 120b Front cover 136 Paper supply part 138 Paper discharge part 142 Process cartridge 150, 152 Case

Claims (5)

  At least (A) polylactic acid, (B) glass fiber whose surface is epoxy-treated, (C) phosphate, and (D) a polyfunctional compound having a functional group that reacts with a terminal group of the polylactic acid, A resin composition comprising:   The resin composition according to claim 1, wherein the phosphate has a melting point of 200 ° C. or higher.   At least (A) the polylactic acid, (B) the glass fiber, (C) the phosphate, and (D) the polyfunctional compound are kneaded under a temperature condition of 150 ° C. or higher and 190 ° C. or lower. The resin composition of Claim 2 obtained.   The resin composition according to claim 1, wherein (B) the phosphate is present around the glass fiber.   The molded object obtained by shape | molding the resin composition of any one of Claims 1-4.