JP4763305B2 - Thermoplastic resin molding - Google Patents

Description

  The present invention relates to a thermoplastic resin composition capable of obtaining a molded article having high toughness by adding a saccharide compound, a polyhydric phenol compound, and the like to a thermoplastic resin.

Polyester resins such as polyethylene terephthalate (PET) and polybutylene terephthalate (PBT), which are thermoplastic resins, polyolefin resins, polycarbonate (PC) resins, styrene resins, polyamide resins, etc. have good moldability. It is widely used in various fields such as various molded products, fibers, films and coating materials.
However, the molded body consisting only of the above thermoplastic resin is not sufficient in mechanical strength, particularly toughness representing the stickiness strength that the material is difficult to be destroyed by external force, and its improvement is required, excellent in tensile strength and bending strength, There is a need for a thermoplastic resin composition that can provide an excellent molded article having high toughness having rigidity, flexibility and impact resistance.

Therefore, in order to obtain an excellent thermoplastic resin composition having high toughness, conventionally, the following four types of addition methods for adding an additive to a thermoplastic resin are known. It is used according to the type of plastic resin.
The first is an addition method called alloy or blend. For example, 5 to 50 parts by mass of polycarbonate (PC) or a rubber component is added to polyethylene terephthalate (PET) to increase toughness.
The second is to add several to tens of parts by weight of a reactive monomer to the thermoplastic resin, to cause a crosslinking reaction in the thermoplastic resin molecules, to prevent an increase in melt viscosity, and thereby to increase toughness. This is an addition method in which a reactive monomer having a functional group rich in chemical reactivity such as an epoxy group or an amine group is added to both ends of the molecule to cause a crosslinking reaction between the polymer and the molecule.
Third, inorganic and organic materials with high rigidity, such as carbon fiber, glass fiber, mica, talc and other minerals, and organic materials such as polyimide fiber, amideimide fiber, and liquid crystal resin are used as thermoplastic resins. It is an addition method for adding and increasing toughness.
Fourthly, by adding a polyhydric phenol compound, a tannin compound, etc. to the thermoplastic resin, the radical generated in the thermoplastic resin is supplemented to enhance the thermal stability effect, and prevention of deterioration during melting in the molding process, etc. (Refer to Patent Documents 1 to 4).

However, in the case of the first addition method, the alloy and the resin to be blended are not necessarily economical or are incompatible, and many of the products obtained as a molded product are opaque, resulting in poor molding. There is a problem that jetting, silver marks, etc. are likely to occur. Furthermore, there is a problem that high toughness cannot always be obtained due to a transesterification reaction or the like.
In the case of the second addition method, a radical is generated at the time of the ring-opening reaction of the epoxy group, the polymer is decomposed by this radical, and in the case of an amine-based monomer, it exhibits basicity. There is a problem that it is accelerated and molecular breakage of the polymer is likely to occur. As a result, there is a problem that high toughness cannot be obtained, but rather, physical properties are lowered by molecular cutting of the polymer, and brittleness is often exhibited.
In the case of the third addition method, since it is a mixture of highly rigid substances, even if the rigidity is improved, the overall flexibility is lost, brittle fracture occurs, and the desired flexibility and toughness cannot be obtained. is there.
In the case of the third addition method, the additive treated with the tannin compound or the like is used to improve the stability in the melting process of the thermoplastic resin, and to further prevent the impact strength from being reduced by the addition of the tannin compound. However, the present situation is that it is not satisfactory for obtaining a thermoplastic resin having high toughness.

Japanese Patent No. 3046963 Japanese Patent No. 3046964 Patent No. 30686614 No. US 6,194,489

  This invention is made | formed in view of this present condition, and makes it a subject to solve the said various problems in the past and to achieve the following objectives. That is, the present invention provides a thermoplastic resin composition and a thermoplastic resin composition that can form a molded article having high toughness even if the addition amount is small, without impairing the basic physical properties of the thermoplastic resin. It aims at providing the thermoplastic resin molding obtained.

Means for solving the problems are as follows. That is,
<1> The thermoplastic resin composition, wherein the content of the saccharide compound is 0.002 to 1.5 parts by mass with respect to 100 parts by mass of the thermoplastic resin.
<2> The polyphenol compound is contained, and the content of the saccharide compound and the polyphenol compound is 0.002 parts by mass to 1.5 parts by mass with respect to 100 parts by mass of the thermoplastic resin. It is a thermoplastic resin composition as described in <1>.
<3> The thermoplastic resin according to any one of <1> to <2>, wherein the content of the saccharide compound is 0.05 part by mass to 0.5 part by mass with respect to 100 parts by mass of the thermoplastic resin. It is a composition.
<4> The thermoplastic resin composition according to any one of <1> to <3>, wherein the saccharide compound is at least one of a monosaccharide, a disaccharide, an oligosaccharide, and a polysaccharide.
<5> The thermoplastic resin composition according to any one of <1> to <4>, wherein the saccharide compound is at least one of glucose, fructose, sucrose, and maltose.
<6> The thermoplastic resin composition according to any one of <1> to <5>, wherein the polyhydric phenol compound is at least one of tannins, catechins, leucoanthocyanes, and chlorogenic acids.
<7> The heat according to any one of <1> to <6>, wherein a mass ratio of the saccharide compound and the polyhydric phenol compound (polyhydric phenol compound: saccharide compound) is 1: 0.2 to 1: 8. It is a plastic resin composition.
<8> The thermoplastic resin composition according to any one of <1> to <7>, wherein the thermoplastic resin is at least one of polyethylene terephthalate, holyethylene terephthalate, and polycarbonate.
<9> A thermoplastic resin molded article formed from the thermoplastic resin composition according to any one of <1> to <8>.

  According to the present invention, a thermoplastic resin composition that can solve various problems in the prior art and can be a molded article having high toughness even if the addition amount is small, without impairing the basic physical properties of the thermoplastic resin. And the thermoplastic resin molding obtained by this thermoplastic resin composition can be provided.

(Thermoplastic resin composition)
In the thermoplastic resin composition of the present invention, the content of at least one of the saccharide compound alone, the mixture of the saccharide compound and the polyhydric phenol compound is 0.002 to 1.5 mass with respect to 100 mass parts of the thermoplastic resin. It is a thermoplastic resin composition containing other components that are appropriately selected as necessary.

<Sugar compound>
The saccharide compound has a function of improving the toughness of the thermoplastic resin by adding sugar to the thermoplastic resin. That is, since sugar is a compound having many hydroxyl groups as its chemical structure regardless of whether it is a monosaccharide or a polysaccharide, for example, it is considered that it is crosslinked by hydrogen bonding or the like when added to an ester resin. It is well known that this hydrogen bond is an extremely weak bond unlike a covalent bond formed by a reactive monomer or the like. Such a weak (small rigidity) bond restrains the polymer to some extent, but is considered to lead to cutting at a certain load or higher, and a resin crosslinked with a moderate weakness is considered to improve toughness. It is considered that the toughness of the thermoplastic resin is improved not only by such a chemical reaction but also by other chemical action of the sugar and the thermoplastic resin.
The saccharide compound is suitable in that it has a sufficient toughness-improving effect even if the addition amount is small, and further, since it is a trace amount, it does not adversely affect the change in physical properties of the resin. In addition, since the saccharide compound exists in nature and has been ingested as food, it is a compound that is gentle to the human body, and includes compounds that adversely affect the human body such as halogen elements and phosphorus elements that are used as the same additive. In terms of handling, etc., it is extremely safe.

The saccharide compound is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include monosaccharides, disaccharides, oligosaccharides and polysaccharides. These may be used individually by 1 type and may use 2 or more types together. These may be extracted from natural plants, synthesized, or a mixture thereof.
Among these, monosaccharides and various oligosaccharides are preferable because they can be purified with high purity by hydrolysis of cellulose with a sulfuric acid catalyst, and are inexpensive and economical.
There is no restriction | limiting in particular as said monosaccharide, According to the objective, it can select suitably, For example, glucose (glucose), fructose (fructose), galactose, mannose etc. are mentioned.
There is no restriction | limiting in particular as said disaccharide, According to the objective, it can select suitably, For example, maltose (malt sugar), saccharose (sucrose (sugar)), cellobiose, lactose etc. are mentioned.
There is no restriction | limiting in particular as said oligosaccharide, According to the objective, it can select suitably, For example, what is called a oligosaccharide etc. which the said monosaccharide couple | bonded about 3-10 are mentioned.
There is no restriction | limiting in particular as said polysaccharide, According to the objective, it can select suitably, For example, starch, cellulose, etc. are mentioned.
Among these, glucose (glucose), fructose (fructose), sucrose (sucrose (sugar)) and maltose (malt sugar) are particularly preferable.

<Polyhydric phenol compound>
The polyhydric phenol compound also has the same functions and effects as the saccharide compound when mixed and used together with the saccharide compound. There is no restriction | limiting in particular as said polyhydric phenol compound, According to the objective, it can select suitably, For example, a tannin compound etc. are mentioned.
The tannin compound is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include tannin, dehydrated condensation polymer of tannin, tannic acids such as tannic acid, catechins, leucoanthocyanates, and chlorogenic acids. Is mentioned. These may be used individually by 1 type and may use 2 or more types together. These tannin compounds are widely contained in natural plants. The classification of such tannin compounds is described in “Takao Murakami, Toshihiko Okamoto: Natural Product Chemistry. P98 (1983) Yodogawa Shoten”. The tannic acid is also called tannin, and is not particularly distinguished in the present invention.

The tannic acids and catechins, which are the tannin compounds, are classified into two types, hydrolyzed tannins and condensed tannins, and since both are natural compounds, there are many compounds having different structures.
Examples of the hydrolyzable tannin include chlorogenic acid composed of depsides such as china tannin, ellagitannin, caffeic acid, and quinic acid.
Examples of the condensed tannins include kepracotannin, wattle tannin, ganbil tannin, cut titanin, and flava tannin.

The China tannin is a typical hydrolyzed tannin, which is obtained by esterifying gallic acid or a derivative thereof. The China tannin is represented by the following structural formula (1). In the China tannin, 10 gallic acid groups are coordinated around a glucose residue, and two gallic acids are bonded in the vertical direction (located at the position of * in Structural Formula (1)). Has been revealed. However, the compound is not necessarily limited to glucose, and may be a cellulose type compound.
Moreover, the diplicside of the gallic acid represented by following Structural formula (2) obtained by hydrolysis of a tannic acid can also be used.
Thus, since tannic acids are compounds widely contained in natural plants, it can be easily inferred that the chemical structures are partially different.

  Further, catechins are compounds represented by the following structural formulas (3) to (6). Keprotannin is a compound represented by the following structural formula (7). Turkish tannin is a compound represented by the following structural formula (8).

  The dehydrated polycondensed tannin is obtained by heating the tannin at 70 to 230 ° C. for several minutes to several hours for dehydration condensation polymerization. In the heated tannin, an average molecular weight of about 1.6 molecules is bonded with a dehydration reaction. This bond is generally due to tannin molecules, but it is thought that one molecule of water is dehydrated from two adjacent hydroxyl groups in the molecule. The tannin is preferably heated and dehydrated at 70 to 230 ° C., and some tannins are subjected to dehydration condensation polymerization. In this case, it is preferable that tannin is dehydrated to some extent, and it does not necessarily need to be polycondensed. Here, the above-mentioned “dehydrated condensation-polymerized tannin” is a name after heat treatment, and “condensation-type tannin” indicating the structural type of tannin is a classification name and is different.

  Polyhydric phenol compounds having a dye fixing effect and a skin tanning effect are called “synthetic tannins” or “syntans”. Such synthetic tannins can also be used effectively in the present invention. The tannins are used as daily necessities, for example, inks, as pharmaceuticals, for example, used as hemostatic agents, and used as industrial products, for example, skin tanning agents and mordants at the time of dyeing. Widely used as an additive.

  The polyhydric phenol compound has a good compatibility with polyethylene terephthalate (PET) which is a thermoplastic polyester resin, terephthalate terephthalate (PBT), or polycarbonate (PC) having a carbonate bond having an approximate structure to a polyester resin. Even when added to these thermoplastic polyester resins, sufficient transparency can be obtained.

<Thermoplastic resin>
The thermoplastic resin is not particularly limited and may be appropriately selected according to the purpose. For example, polyester resins such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyhexamethylene terephthalate, polystyrene, High impact polystyrene (HIPS), acrylonitrile butadiene styrene (ABS), chlorinated polyethylene acrylonitrile styrene (ACS), styrene acrylonitrile (SAN), acrylonitrile butyl acrylate styrene (AAS), butadiene styrene, styrene maleic acid, styrene maleimide, ethylene propylene acrylonitrile styrene (AES), styrene resin such as butadiene methyl styrene styrene (MBS), polycarbonate, branched Polycarbonate resins such as polycarbonate, α-olefin polymers such as low density polyethylene, linear low density polyethylene, high density polyethylene, polypropylene, polybutene-1, poly-3-methylbutene, poly-3-methylpentene, or ethylene-acetic acid Polyolefin resins such as vinyl copolymers, ethylene / propylene blocks or random copolymers and their copolymers, polyamide resins such as polyhexamethylene adipamide (nylon 66), polycaprolactam (nylon 6), polyphenylene Examples include oxide (PPO) resin, polyphenylene sulfone (PPS) resin, polyacetal (POM), petroleum resin, coumarone resin, polyvinyl acetate resin, acrylic resin, and polymer alloy of polycarbonate and styrene resin. It is done. These may be used individually by 1 type and may use 2 or more types together.
Among these, polyester-based resins and polycarbonate-based resins are preferable. Specifically, polyethylene terephthalate (PET) resin, holylene terephthalate (PBT) resin, or polycarbonate (PC having an approximate structure to polyester resin (PC) Etc.) are preferred.

<Other ingredients>
The other components are not particularly limited and can be appropriately selected from known additives used in the resin composition according to the purpose. For example, glass fibers, carbon fibers, or inorganic fibers Whisker etc. may be contained and Kevlar fiber etc. may be contained as organic fiber. Further, inorganic particles such as minerals such as silica, talc, mica, wollastonite, clay and calcium carbonate may be included. Furthermore, an antibacterial agent, a flame retardant, etc. can also be mix | blended as needed.

<Content of thermoplastic resin composition>
The addition amount of the saccharide compound of the present invention alone, the mixture of the saccharide compound and the polyhydric phenol compound to the thermoplastic resin is preferably 0.002 to 1.5 parts by mass with respect to 100 parts by mass of the thermoplastic resin. 01-1.0 mass part is more preferable, and 0.05-0.5 mass part is especially preferable. When the addition amount is less than 0.002 parts by mass, it may be difficult to sufficiently impart toughness to the thermoplastic resin. A large amount of saccharide compounds may be present, which may reduce the thermal characteristics and mechanical strength of the thermoplastic resin.

  The method for adding the thermoplastic resin composition is not particularly limited and may be appropriately selected depending on the purpose.For example, powdered saccharides and tannin compounds may be mixed and added directly to the resin, Alternatively, a mixture (master batch) mixed in advance with a target resin at a high concentration may be prepared, and the master batch may be added to the resin.

  The method for molding the thermoplastic resin composition of the present invention is not particularly limited, and can be appropriately selected from known methods according to the purpose. For example, film molding, extrusion molding, injection molding, blow molding , Compression molding, transfer molding, calendar molding, thermoforming, fluid molding, laminate molding, and the like. By these methods, a thermoplastic resin molded body having high toughness can be obtained from the thermoplastic resin composition of the present invention.

<Mass ratio of saccharide compound and polyphenol compound>
In the thermoplastic resin composition, the mass ratio between the saccharide compound and the polyhydric phenol compound (saccharide compound: polyhydric phenol compound) is preferably 1: 0.2 to 1: 8, and preferably 1: 1 to 1: 3 is more preferable. When the mass ratio of the saccharide is less than 0.2 with respect to the saccharide compound 1, the toughness-imparting effect may not be obtained. If the phenol compound exceeds 8, the physical properties of the thermoplastic resin may deteriorate when added to the thermoplastic resin. Moreover, when the mixing amount of the polyhydric phenol is too small, the effect of imparting toughness may not be obtained. On the other hand, when the amount is too large, the moldability may be deteriorated when added to the resin.

<Thermoplastic resin molding>
There is no restriction | limiting in particular as said thermoplastic resin molded object, According to the objective, it can select suitably, For example, various shapes, structures, a molded object etc. are mentioned. Specifically, it can be widely used for a housing and a part of various home appliances OA products such as a personal computer, a printer, a television, a stereo, a copier, an air conditioner, a refrigerator, a washing machine, and a stereo.

  Examples of the present invention will be described below, but the present invention is not limited to these examples.

( Reference Example 1)
<Preparation of thermoplastic resin composition>
Polyethylene terephthalate (PET) resin (Mitsui PETJ120: manufactured by Mitsui Chemicals, Inc.) was used as the thermoplastic resin.
The polyethylene terephthalate (PET) resin was made to contain sucrose (white sugar: manufactured by Nissin Sugar Co., Ltd.), which is a saccharide compound.
The sucrose content is 100 parts by mass of the thermoplastic resin.
Lot number 1 ... 0.005 parts by mass Lot number 2 ... 0.05 parts by mass Lot number 3 ... 0 1 part by mass lot number 4 ... 0.2 parts by mass lot number 5 ... 0.5 parts by mass lot number 6 ... 1 part by mass Lot No. 7 ... 5 parts by mass, and the thermoplastic resin composition of Reference Example 1 was prepared as follows.
First, the polyethylene terephthalate (PET) resin as an additive is set in a dehumidifying dryer (PO-200 type: manufactured by Matsui Seisakusho Co., Ltd.) and dried at 110 ° C. for 10 hours. Add the amount of sucrose of lot number 1-7, and stir and mix for 4 minutes at a stirring blade rotation speed of about 300 rpm using a tumbler, tumble mixer (TM-50 type, 8 blades: manufactured by Nissui Processing Co., Ltd.) The thermoplastic resin compositions of the lot numbers 1 to 7 were prepared.

<Strength measurement test>
Next, test pieces were prepared for the obtained thermoplastic resin compositions of the lot numbers 1 to 7, and a strength measurement test was performed as follows.
Using the injection molding machine (F-85 type, clamping pressure 85 ton: manufactured by Crocner), the tensile test pieces of each thickness indicated by JIS-K7113 are taken together with the thermoplastic resin compositions of the lot numbers 1-7. A test piece was produced by molding using a mold designed to be able to. Lot number of the test pieces, and so the lot number 1 of the specimen with respect to Reference Example 1 Lot No. 1, using the same lot number and reference examples.
About the obtained test piece of the lot numbers 1-7, the tension test and the bending test were done using the tensile tester (V10-C type: Toyo Seiki Co., Ltd. product). At this time, the tensile and bending speeds were both 2 mm / min. The results are shown in Table 1.

(Example 2)
Polyethylene terephthalate (PET) resin (Mitsui PETJ120: manufactured by Mitsui Chemicals, Inc.) was used as the thermoplastic resin.
Polyethylene terephthalate (PET) resin was made to contain China tannin, which is a polyhydric phenol compound (reagent grade 1: manufactured by Karai Tesque Co., Ltd.) and sucrose, which is a saccharide compound (white sugar: manufactured by Nissin Sugar Co., Ltd.).
The content of the china tannin and sucrose is 100 parts by mass of the thermoplastic resin.
Lot number 8 ... China tannin ... 0.02 parts by mass
Sucrose ... 0.04 parts by mass Lot number 9: China tannins ... 0.05 parts by mass
Sucrose ... 0.1 parts by mass Lot number 10 ... China tannin ... 0.1 parts by mass
Sucrose ... 0.2 parts by mass Lot No. 11 ・ China tannin ... 0.2 parts by mass
Sucrose: 0.4 parts by mass Lot number 12: China tannin ... 0.5 parts by mass
Sucrose ········· 1 part by mass, and in the same manner as in Reference Example 1, the thermoplastic resin composition of Example 2 was prepared.
About each obtained thermoplastic resin composition, it carried out similarly to the reference example 1, the strength measurement test was done, and the result was shown in Table 1.

(Example 3)
Polyethylene terephthalate (PET) resin (Mitsui PETJ120: manufactured by Mitsui Chemicals, Inc.) was used as the thermoplastic resin.
As the thermoplastic resin composition, catechin (reagent grade 1: manufactured by Kanto Chemical Co., Ltd.) which is a polyhydric phenol compound and sucrose (sugar white: manufactured by Nissin Sugar Co., Ltd.) which is a saccharide compound were used.
The content of the catechin and sucrose is 100 parts by mass of the thermoplastic resin.
Lot No. 13 ... Catechin ... 0.02 parts by mass
Sucrose ... 0.04 parts by mass Lot No. 14 ... Catechin ... 0.05 parts by mass
Sucrose ... 0.1 parts by mass Lot number 15 ... Catechin ... 0.1 parts by mass
Sucrose ... 0.2 parts by mass Lot number 16 ... Catechin ... 0.2 parts by mass
Sucrose: 0.4 parts by mass Lot number 17: Catechin: 0.5 parts by mass
Sucrose: 0.5 parts by mass The same thermoplastic resin composition as in Example 3 was prepared in the same manner as in Reference Example 1.
About each obtained thermoplastic resin composition, it carried out similarly to the reference example 1, the strength measurement test was done, and the result was shown in Table 1.

( Reference Example 4)
Polyethylene terephthalate (PET) resin (Mitsui PETJ120: manufactured by Mitsui Chemicals, Inc.) was used as the thermoplastic resin.
Glucose (reagent grade 1: manufactured by Nacalai Tesque, Inc.), which is a saccharide compound, was contained in polyethylene terephthalate (PET) resin.
The glucose content is 100 parts by mass of the thermoplastic resin.
The thermoplastic resin composition of Reference Example 4 was prepared in the same manner as in Reference Example 1 except that the lot number was 18.
The obtained thermoplastic resin composition was subjected to a strength measurement test in the same manner as in Reference Example 1, and the results are shown in Table 1.

(Example 5)
Polyethylene terephthalate (PET) resin (Mitsui PETJ120: manufactured by Mitsui Chemicals, Inc.) was used as the thermoplastic resin.
Polyethylene terephthalate (PET) resin was made to contain China tannin which is a polyhydric phenol compound (reagent grade 1: manufactured by Nacalai Tesque Co., Ltd.) and sucrose which is a saccharide compound (white sugar: manufactured by Nissin Sugar Co., Ltd.).
The China tannin and sucrose are mixed at a mass ratio of 1: 8, and 16 kinds of parts by mass selected in the range of 0 to 10 parts by mass are added to 100 parts by mass of the thermoplastic resin. A plastic resin composition was prepared.
About the obtained thermoplastic resin composition, the strength measurement test was done similarly to the reference example 1, and the result of tensile strength (MPa) and bending strength (MPa) is shown in FIG.
From the results of FIG. 1 and FIG. 2, the effect of clearly increasing the strength of the thermoplastic resin composed of the thermoplastic resin composition by adding the polyhydric phenol compound and the saccharide compound was remarkably recognized.

( Reference Example 6)
As the thermoplastic resin, a polycarbonate (PC) resin (Panlite L1250Y: manufactured by Teijin Chemicals Ltd.) was used.
Polysaccharide (PC) resin was made to contain sucrose (white sugar: manufactured by Nissin Sugar Co., Ltd.), which is a saccharide compound.
The sucrose content is 100 parts by mass of the thermoplastic resin.
And lot number 23 ......... 0.1 parts by lot number 24 ......... 0.2 part by weight, in the same manner as in Reference Example 1, thermoplastic Reference Example 6 A resin composition was prepared.
About each obtained thermoplastic resin composition, it carried out similarly to the reference example 1, the strength measurement test was done, and the result was shown in Table 1.

( Reference Example 7)
As the thermoplastic resin, polybutylene terephthalate (PBT) resin (Duranex 2000: manufactured by Wintech Polymer Co., Ltd.) was used.
Polybutylene terephthalate (PBT) resin was allowed to contain sucrose (white sugar: manufactured by Nissin Sugar Co., Ltd.), which is a saccharide compound.
The sucrose content is 100 parts by mass of the thermoplastic resin.
And lot number 27 ......... 0.1 parts by lot number 28 ......... 0.2 part by weight, in the same manner as in Reference Example 1, thermoplastic Reference Example 7 A resin composition was prepared.
About each obtained thermoplastic resin composition, it carried out similarly to the reference example 1, the strength measurement test was done, and the result was shown in Table 1.

(Comparative Example 1)
In Reference Example 1, except that sucrose was not added, a strength measurement test was performed on the test piece of Comparative Example 1 lot number 19 in the same manner as in Reference Example 1, and the results are shown in Table 1.

(Comparative Example 2)
Polyethylene terephthalate (PET) resin (Mitsui PETJ120: manufactured by Mitsui Chemicals, Inc.) was used as the thermoplastic resin.
As the thermoplastic resin composition, a Chinese tannin (reagent grade 1: manufactured by Nacalai Tesque, Inc.), which is a saccharide compound, was used.
The content of the china tannin is 100 parts by mass of the thermoplastic resin.
Lot number 20 ... 0.005 parts by mass Lot number 21 ... 0.02 parts by mass Lot number 22 ... 0.1 mass In the same manner as in Reference Example 1, a thermoplastic resin composition of Comparative Example 2 was prepared.
The obtained thermoplastic resin composition was subjected to a strength measurement test in the same manner as in Reference Example 1, and the results are shown in Table 1.

(Comparative Example 3)
In Reference Example 6, except that sucrose was not added, a strength measurement test was performed on the test piece of Comparative Example 3 lot number 25 in the same manner as in Reference Example 6, and the results are shown in Table 1.

(Comparative Example 4)
In Reference Example 7, except that sucrose was not added, a strength measurement test was performed on the test piece of Comparative Example 4 lot number 28 in the same manner as in Reference Example 7, and the results are shown in Table 1.

From the results of Table 1, PET to which sucrose of Reference Example 1 lot numbers 1 to 7 was added was added to PET with no addition of Comparative Example 1 lot number 19 and PET to which China Tannin of Comparative Example 2 lot numbers 20 to 22 was added. In comparison, it was found that the tensile strength and the bending strength were improved, and the content was remarkable at 0.1 to 0.5 parts by mass.
Example 2 PET to which China tannin and sucrose of lot numbers 8 to 12 were added were both compared to PET without addition of Comparative Example 1 lot number 19 and PET with addition of China tannin of Comparative Example 2 lot numbers 20 to 22. In comparison, the tensile strength and bending strength were improved, and the content was found to be remarkable at 0.05 / 0.1 part by mass.
Example 3 PET to which catechin and sucrose of lot numbers 13 to 17 were added was tensile compared to PET without additive of comparative example 1 lot number 19 and PET with added Chinese tannin of comparative example 2 lot numbers 20 to 22. It was found that the strength and the bending strength were improved and the content was remarkable when the content was 0.1 / 0.2 part by mass.
Reference Example 4 PET with addition of glucose of lot number 18 has a tensile strength and bending strength compared to PET without addition of comparative example 1 lot number 19 and PET with addition of china tannin of comparative example 2 lot numbers 20-22. It has been found that it is the most improved.
Reference Example 6 It was found that both the tensile strength and bending strength of the PC added with sucrose of lot numbers 23 to 24 were remarkably improved as compared with the additive-free PC of comparative example 3 lot number 25.
Reference Example 7 It was found that the tensile strength and bending strength of the PBT added with sucrose of lot numbers 26 to 27 were remarkably improved as compared with the non-added PBT of comparative example 4 lot number 28.
In any of the examples, when the saccharide compound of the present invention alone, a mixture of the saccharide compound and the polyhydric phenol compound is added, both the tensile strength and the bending strength are improved, and the thermoplastic becomes a molded body having excellent toughness. It was found that a resin composition was obtained.

The thermoplastic resin composition of the present invention provides excellent toughness by adding at least one of a saccharide compound alone, a mixture of a saccharide compound and a polyphenol compound to a thermoplastic resin, particularly a polyester resin or a polycarbonate resin. can do.
The thermoplastic resin composition of the present invention is suitably used for molded articles such as parts of various household appliances OA products such as personal computers, printers, televisions, stereos, copy machines, air conditioners, refrigerators, washing machines, stereos, and the like.

FIG. 1 is a graph showing the relationship between the added amount of saccharides and polyhydric phenol compound and the tensile strength and bending strength in Example 5.

Claims (8)

Containing a saccharide compound and a polyphenol compound,
The polyhydric phenol compound is at least one of tannins, catechins, leucoanthocyanes, and chlorogenic acids;
The content of the saccharide compound and the polyhydric phenol compound is formed of a thermoplastic resin composition that is 0.002 parts by mass to 1.5 parts by mass with respect to 100 parts by mass of the thermoplastic resin. Thermoplastic resin molded body.   The thermoplastic resin molded article according to claim 1, which is formed by injection molding of a thermoplastic resin composition.   3. The thermoplastic resin molded article according to claim 1, wherein the content of the saccharide compound is 0.05 part by mass to 0.5 part by mass with respect to 100 parts by mass of the thermoplastic resin.   The thermoplastic resin molded article according to any one of claims 1 to 3, wherein the saccharide compound is at least one of a monosaccharide, a disaccharide, an oligosaccharide, and a polysaccharide.   The thermoplastic resin molded article according to any one of claims 1 to 4, wherein the saccharide compound is at least one of glucose, fructose, sucrose, and maltose. The thermoplastic resin molded article according to any one of claims 1 to 5, wherein a mass ratio of the saccharide compound and the polyhydric phenol compound (polyhydric phenol compound: saccharide compound) is 1: 0.2 to 1: 8. The thermoplastic resin molded article according to any one of claims 1 to 6, wherein the thermoplastic resin is at least one of polyethylene terephthalate, holyethylene terephthalate, and polycarbonate. The polyphenol compound is china tannin or catechin,
The thermoplastic resin molded article according to any one of claims 1 to 7, wherein the saccharide compound is sucrose.

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