JP2018104660A - Resin composition and resin molded article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resin composition that makes it possible to obtain a resin molded article having a high bending elastic modulus.SOLUTION: Provided is a resin composition including: a thermoplastic resin; and a terminal sterol modified resin containing at least one of an amide bond and an imide bond in the main chain, with at least one terminal of the main chain being modified with a sterol residue.SELECTED DRAWING: None

Description

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

Conventionally, various resin compositions have been provided and used for various applications.
In particular, a resin composition containing a thermoplastic resin is used in parts such as home appliances, various parts of automobiles, casings, office equipment, and casings of electronic and electrical equipment.

  For example, Patent Document 1 discloses that “(a) 0.1 to 90% by weight of at least one polyolefin, (b) 0.1 to 50% by weight of at least one polyamide, (c) 0.1 to 0.1% by weight,” 15% by weight of at least one modified polyolefin, (d) 5.0-75% by weight of at least one reinforcing fiber, (e) 0.1-10% by weight of at least one sulfur-containing additive. A long fiber reinforced polyolefin structure having a length of 3 mm or more is disclosed.

Patent Document 2 discloses that “it has an acid-modified polyolefin (A) block and a polyamide (B) block, carbon derived from an amide group by ¹³ C-NMR, carbon derived from a methyl group, a methylene group, and a methine group” Is a polyolefin resin modifier comprising a polymer (X) having a ratio (α) of 0.5 / 99.5 to 12/88 ”. Furthermore, Patent Document 2 discloses "Inorganic fiber-containing polyolefin resin composition comprising this polyolefin resin modifier (K), polyolefin resin (D) and inorganic fiber (E)." .
Patent Document 3 states that “in a thermoplastic resin molded product containing carbon fiber, the carbon fiber contained in the molded product has a total content of 0.5 to 30 wt% and a length exceeding 1.5 mm. The carbon fiber-containing thermoplastic resin molded product characterized in that the carbon fiber is 0.1 to 4.7 wt%.

Japanese translation of PCT publication No. 2003-528956 JP 2014-181307 A JP 2000-071245 A

  An object of the present invention is to provide a resin composition containing a thermoplastic resin and a resin containing at least one of an amide bond and an imide bond in the main chain, as a resin containing at least one of the amide bond and the imide bond in the main chain. An object of the present invention is to provide a resin composition from which a resin molded body having a high flexural modulus can be obtained as compared with the case where only modified polyamide is included.

  The above object is achieved by the present invention described below.

The invention according to claim 1
A thermoplastic resin;
A terminal sterol-modified resin containing at least one of an amide bond and an imide bond in the main chain and at least one terminal of the main chain modified with a sterol residue;
A resin composition comprising:

The invention according to claim 2
The resin composition according to claim 1, wherein the thermoplastic resin is a polyolefin.

The invention according to claim 3
The resin composition according to claim 1 or 2, wherein the terminal sterol-modified resin is a polyamide containing the amide bond in the main chain.

The invention according to claim 4
The resin composition according to any one of claims 1 to 3, wherein a content of the terminal sterol-modified resin is 0.1 parts by mass or more and 100 parts by mass or less with respect to 100 parts by mass of the thermoplastic resin.

The invention according to claim 5
The resin composition according to any one of claims 1 to 4, comprising a compatibilizing agent.

The invention according to claim 6
The resin composition according to claim 5, wherein the compatibilizer is a modified polyolefin.

The invention according to claim 7 provides:
The resin composition according to claim 5 or 6, wherein a content of the compatibilizing agent is 0.1 parts by mass or more and 50 parts by mass or less with respect to 100 parts by mass of the thermoplastic resin.

The invention according to claim 8 provides:
The resin composition according to any one of claims 5 to 7, wherein a content of the compatibilizing agent is 1 part by mass or more and 50 parts by mass or less with respect to 100 parts by mass of the terminal sterol-modified resin.

The invention according to claim 9 is:
A thermoplastic resin;
A terminal sterol-modified resin containing at least one of an amide bond and an imide bond in the main chain and at least one terminal of the main chain modified with a sterol residue;
A resin molded body containing

The invention according to claim 10 is:
The resin molded body according to claim 9, wherein the thermoplastic resin is a polyolefin.

The invention according to claim 11 is:
The resin molded product according to claim 9 or 10, wherein the terminal sterol-modified resin is a polyamide containing the amide bond in a main chain.

The invention according to claim 12
The resin molded body according to any one of claims 9 to 11, wherein a content of the terminal sterol-modified resin is 0.1 parts by mass or more and 100 parts by mass or less with respect to 100 parts by mass of the thermoplastic resin.

The invention according to claim 13 is:
The resin molding of any one of Claims 9-12 containing a compatibilizing agent.

The invention according to claim 14 is:
The resin molding according to claim 13, wherein the compatibilizing agent is a modified polyolefin.

The invention according to claim 15 is:
The resin molded body according to claim 13 or 14, wherein a content of the compatibilizing agent is 0.1 parts by mass or more and 50 parts by mass or less with respect to 100 parts by mass of the thermoplastic resin.

The invention according to claim 16 provides:
The resin molded body according to any one of claims 13 to 15, wherein a content of the compatibilizing agent is 1 part by mass or more and 50 parts by mass or less with respect to 100 parts by mass of the terminal sterol-modified resin.

According to the invention according to claim 1, 2, or 3, in a resin composition comprising a thermoplastic resin and a resin containing at least one of an amide bond and an imide bond in the main chain, at least one of the amide bond and the imide bond Compared to the case where only terminal-unmodified polyamide is contained as a resin containing in the main chain, a resin composition capable of obtaining a resin molded body having a high flexural modulus is provided.
According to the invention which concerns on Claim 4, compared with the case where content of terminal sterol modification resin is less than 0.1 mass part or more than 100 mass parts with respect to 100 mass parts of thermoplastic resins, resin which has a high bending elastic modulus A resin composition from which a molded body can be obtained is provided.
According to the invention which concerns on Claim 5, compared with the case where a thermoplastic resin and terminal sterol modified resin are included, and a compatibilizer is not included, the resin composition from which the resin molding which has a high bending elastic modulus is obtained is provided. Is done.
According to the invention which concerns on Claim 6, compared with the case where an epoxy copolymer is used as a compatibilizing agent, the resin composition from which the resin molding which has a high bending elastic modulus is obtained is provided.
According to the invention which concerns on Claim 7, compared with the case where content of a compatibilizing agent is less than 0.1 mass part or more than 50 mass parts with respect to 100 mass parts of thermoplastic resins, the resin molding which has a high bending elastic modulus A resin composition from which a body is obtained is provided.
According to the invention which concerns on Claim 8, compared with the case where content of a compatibilizing agent is less than 1 mass part or more than 50 mass parts with respect to 100 mass parts of terminal sterol modified resin, the resin molding which has a high bending elastic modulus. Is provided.

According to the invention according to claim 9, 10, or 11, in a resin molded article comprising a thermoplastic resin and a resin containing at least one of an amide bond and an imide bond in the main chain, at least one of the amide bond and the imide bond. Compared to the case where only terminal-unmodified polyamide is included as a resin containing in the main chain, a resin molded body having a higher flexural modulus is provided.
According to the invention which concerns on Claim 12, compared with the case where content of terminal sterol modification resin is less than 0.1 mass part or more than 100 mass parts with respect to 100 mass parts of thermoplastic resins, resin which has a high bending elastic modulus A shaped body is provided.
According to the invention which concerns on Claim 13, compared with the case where a thermoplastic resin and terminal sterol modified resin are included and a compatibilizing agent is not included, the resin molding which has a high bending elastic modulus is provided.
According to the invention which concerns on Claim 14, compared with the case where an epoxy copolymer is used as a compatibilizing agent, the resin molding which has a high bending elastic modulus is provided.
According to the invention which concerns on Claim 15, compared with the case where content of a compatibilizing agent is less than 0.1 mass part or more than 50 mass parts with respect to 100 mass parts of thermoplastic resins, the resin molding which has a high bending elastic modulus The body is provided.
According to the invention which concerns on Claim 16, compared with the case where content of a compatibilizing agent is less than 1 mass part or more than 50 mass parts with respect to 100 mass parts of terminal sterol modified resin, the resin molding which has a high bending elastic modulus. Is provided.

  Hereinafter, an embodiment as an example of the resin composition and the resin molded body of the present invention will be described.

[Resin composition]
The resin composition according to the present embodiment includes a thermoplastic resin, a terminal sterol-modified resin containing at least one of an amide bond and an imide bond in the main chain, and at least one terminal of the main chain is modified with a cholesterol residue. ,including.

In the present specification, the “sterol residue” means a sterol (steroid alcohol) having a hydroxyl group (—OH), a resin having at least one of an amide bond and an imide bond in the main chain and having a functional group at the terminal, Represents a sterol residue (that is, a group obtained by removing a hydroxyl group (—OH) from a sterol) bonded to the terminal of the resin.
In addition, “cholesterol residue” refers to the residue of cholesterol bound to the terminal of the resin by the reaction of cholesterol with a resin having at least one of an amide bond and an imide bond in the main chain and having a functional group at the terminal. Represents a group (that is, a group obtained by removing a hydroxyl group (—OH) from cholesterol).

In recent years, in order to obtain resin molded products having various performances, a mixed resin composition obtained by mixing a thermoplastic resin as a base material (matrix) and a resin different from the thermoplastic resin, a so-called alloy resin. Is used. As such an alloy resin, a resin composition containing a thermoplastic resin as a base material and a resin containing at least one of an amide bond and an imide bond in the main chain is known.
However, in such a resin composition, the affinity between the thermoplastic resin and the resin containing at least one of an amide bond and an imide bond in the main chain may be low, resulting in poor compatibility and miscibility of both resins. May decrease the mechanical strength, especially the flexural modulus.

Therefore, in the present embodiment, in a resin composition including two components of a thermoplastic resin and a resin including at least one of an amide bond and an imide bond in the main chain, the main chain includes at least one of the amide bond and the imide bond. The resin includes a terminal sterol-modified resin in which at least one terminal of the main chain is modified with a sterol residue.
By setting it as this structure, the resin composition from which the resin molding which has a high bending elastic modulus is obtained is obtained. Although it is not clear about the operation | movement from which such an effect is acquired, it estimates as follows.

Since the steroid structure is easy to crystallize, the sterol residue has high crystallinity, and the thermoplastic resin as a base material generally has high crystallinity. Therefore, in the molecular structure of the terminal sterol-modified resin, the terminal sterol residue remains. The group is excellent in affinity with the thermoplastic resin. Therefore, the terminal sterol residue tends to exist in a state of being oriented toward the thermoplastic resin as a base material due to the above-mentioned affinity. As a result, the terminal sterol residue oriented from the terminal sterol-modified resin into the thermoplastic resin is compatible with the thermoplastic resin, so that an equilibrium state between attractive force and repulsive force is formed. It is considered that the dispersibility of the terminal sterol-modified resin in the resin is improved and the compatibility is improved.
And by increasing the compatibility between the thermoplastic resin as the base material and the terminal sterol-modified resin, the miscibility of both resins can be improved even when a resin molded body is obtained, resulting in excellent mechanical strength, especially It is considered that a resin molded body having a high flexural modulus can be obtained.

  From the above, in this embodiment, it is presumed that a resin composition from which a resin molded body having a high flexural modulus can be obtained.

  In addition, the steroid structure becomes a nucleating material and a crystallization material for thermoplastic resin. Therefore, by using a resin composition containing a terminal sterol-modified resin having a sterol residue at the terminal, it is effective in shortening the curing tact at the time of injection molding, and a high throughput of injection molding can be achieved.

  The resin composition according to the present embodiment includes two components of a thermoplastic resin and a resin containing at least one of an amide bond and an imide bond in the main chain, and at least one of the amide bond and the imide bond. The resin contained in the main chain includes a terminal sterol-modified resin in which at least one terminal of the main chain is modified with sterol. In the resin composition containing the above two components, a resin molded article having excellent impact resistance as compared with the case where only terminal unmodified polyamide is contained as a resin containing at least one of the amide bond and imide bond in the main chain. Is a resin composition obtained. Although it is not clear about the operation | movement from which such an effect is acquired, it estimates as follows.

In general, for improving the elastic modulus of a resin, a method of firmly fixing the molecular structure by chemical bonding between functional groups contained in the resin is effective. In particular, it is said that the elastic modulus can be greatly increased by forming a network structure by forming a large number of crosslinking points between polymer chains. However, if a strong impact force or the like is instantaneously applied to a resin having a strongly bonded cross-linked structure, the cross-linked structure may be destroyed, that is, it is easy to achieve both high elastic modulus and impact resistance in the resin. Not.
On the other hand, in the resin composition according to this embodiment, the terminal sterol group in the terminal sterol-modified resin is mixed (affinity) with the thermoplastic resin with a relatively weak binding force. As a result, even when an impact is applied instantaneously, the impact force can be diffused by relaxing the internal structure, resulting in a high elastic modulus (especially a high flexural modulus) and improved impact resistance. it is conceivable that.

  In addition, in the resin composition (and its resin molding) which concerns on this embodiment, it is good also as a structure in which a compatibilizing agent is partially compatible between this terminal sterol modified resin and a thermoplastic resin, for example. Specifically, for example, a compatibilizer may be interposed between the terminal sterol-modified resin and the base thermoplastic resin. Due to the presence of the compatibilizing agent, the affinity between the terminal sterol-modified resin and the thermoplastic resin is increased, and the flexural modulus of the resin molded body is easily improved.

In particular, the compatibilizer is bonded to the terminal sterol-modified resin (hydrogen bond, covalent bond by the reaction of the functional group of the compatibilizer and the terminal sterol-modified resin, etc.) and is compatible with the thermoplastic resin, It is preferable to interpose between the terminal sterol-modified resin and the thermoplastic resin. In this configuration, for example, as a compatibilizing agent, it has the same structure as the matrix thermoplastic resin or a compatible structure, and a part that reacts with the functional group of the terminal sterol-modified resin in a part of the molecule. It is easy to realize when a compatibilizing agent is included.
Specifically, for example, when applying a polyolefin as a thermoplastic resin, a polyamide in which at least one end of the main chain is modified with a sterol residue as a terminal sterol-modified resin, and a maleic anhydride modified polyolefin as a compatibilizing agent, Maleic anhydride-modified polyolefin (compatibility agent) is a state in which the maleic anhydride moiety is ring-opened and the carboxy group formed by reaction with the amine residue of the polyamide is bonded and the polyolefin moiety is compatible with the polyolefin. It is better to intervene.

Here, the method for confirming that the compatibilizing agent is interposed between the terminal sterol-modified resin and the thermoplastic resin is as follows.
An infrared spectroscopic analyzer (NICOLET6700FT-IR manufactured by Thermo Fisher) is used as the analyzer. For example, in the case of a resin composition (or resin molding) of polypropylene (hereinafter PP) as a thermoplastic resin, terminal sterol-modified PA66 as a terminal sterol-modified resin, and maleic acid-modified polypropylene (hereinafter MA-PP) as a modified polyolefin. IR spectra of PP, terminal sterol-modified PA66, PP and MA-PP, PP alone, terminal sterol-modified PA66, and MA-PP alone are obtained by the KBr tablet method. the peak area of wave number 1820 cm ^-1 or 1750 cm ^-1 or less in the range of from anhydride (characteristic peaks in MA-PP) comparative analysis of. In the mixture of PP, terminal sterol-modified PA66 and MA-PP, a decrease in the acid anhydride peak area is confirmed, and it is confirmed that MA-PP and terminal sterol-modified PA66 are reacting. Thereby, it can be confirmed that a compatibilizing agent is interposed between the terminal sterol-modified resin and the thermoplastic resin. Specifically, when MA-PP and terminal sterol-modified PA66 are reacted, the cyclic maleated moiety of MA-PP is opened and the amine residue of terminal sterol-modified PA66 is chemically bonded to form a cyclic maleated moiety. Therefore, it can be confirmed that a compatibilizing agent is interposed between the terminal sterol-modified resin and the thermoplastic resin.

  Hereinafter, the detail of each component of the resin composition which concerns on this embodiment is demonstrated.

-Thermoplastic resin (A)-
The thermoplastic resin is a base material of the resin composition (also called a matrix resin).
The thermoplastic resin is not particularly limited. For example, polyolefin (PO), polyphenylene sulfide (PPS), polyamide (PA), polyimide (PI), polyamideimide (PAI), polyetherimide (PEI), Polyetheretherketone (PEEK), Polyethersulfone (PES), Polyphenylsulfone (PPSU), Polysulfone (PSF), Polyethylene terephthalate (PET), Polybutylene terephthalate (PBT), Polyacetal (POM), Polycarbonate (PC) ), Polyvinylidene fluoride (PVDF), acrylonitrile butadiene styrene copolymer (ABS), acrylonitrile styrene (AS), and the like.
A thermoplastic resin may be used individually by 1 type, and may use 2 or more types together.

Among these, polyolefin (PO) is preferable from the viewpoint of further improvement of the flexural modulus when the resin molded body is obtained and cost.
The polyolefin is a resin containing a repeating unit derived from an olefin, and may contain a repeating unit derived from a monomer other than the olefin as long as it is 30% by mass or less based on the whole resin.
Polyolefin is obtained by addition polymerization of olefin (a monomer other than olefin, if necessary).
Moreover, 1 type may be sufficient as the monomer other than an olefin and olefin for obtaining polyolefin, respectively, and 2 or more types may be sufficient as it.
The polyolefin may be a copolymer or a homopolymer. The polyolefin may be linear or branched.

Here, examples of the olefin include linear or branched aliphatic olefins and alicyclic olefins.
Examples of the aliphatic olefin include α-olefins such as ethylene, propylene, 1-butene, 1-hexene, 4-methyl-1-pentene, 1-octene, 1-decene, 1-hexadecene and 1-octadecene.
Examples of the alicyclic olefin include cyclopentene, cycloheptene, norbornene, 5-methyl-2-norbornene, tetracyclododecene, vinylcyclohexane and the like.
Among these, from the viewpoint of cost, α-olefin is preferable, ethylene and propylene are more preferable, and propylene is particularly preferable.

The monomer other than olefin is selected from known addition polymerizable compounds.
Examples of the addition polymerizable compound include styrenes such as styrene, methylstyrene, α-methylstyrene, β-methylstyrene, t-butylstyrene, chlorostyrene, chloromethylstyrene, methoxystyrene, styrenesulfonic acid or a salt thereof; (Meth) acrylic acid esters such as alkyl (meth) acrylate, benzyl (meth) acrylate and dimethylaminoethyl (meth) acrylate; halovinyls such as vinyl chloride; vinyl esters such as vinyl acetate and vinyl propionate; Vinyl ethers such as vinyl methyl ether; vinylidene halides such as vinylidene chloride; N-vinyl compounds such as N-vinylpyrrolidone; and the like.

Suitable polyolefins include polypropylene (PP), polyethylene (PE), polybutene, polyisobutylene, coumarone / indene resin, terpene resin, ethylene / vinyl acetate copolymer resin (EVA), and the like.
Especially, it is preferable that it is resin containing only the repeating unit derived from an olefin, and a polypropylene is especially preferable from the point of cost.

The molecular weight of the thermoplastic resin is not particularly limited, and may be determined according to the type of resin, molding conditions, the resin molding, and the like. For example, if the thermoplastic resin is polyolefin, the weight average molecular weight (Mw) is preferably in the range of 10,000 to 300,000, and more preferably in the range of 10,000 to 200,000.
Further, the glass transition temperature (Tg) or melting point (Tm) of the thermoplastic resin is not particularly limited as in the case of the molecular weight, and may be determined according to the type of resin, molding conditions, use of the resin molding, and the like. For example, if the thermoplastic resin is polyolefin, the melting point (Tm) thereof is preferably in the range of 100 ° C. or higher and 300 ° C. or lower, and more preferably in the range of 150 ° C. or higher and 250 ° C. or lower.

In addition, the weight average molecular weight (Mw) and melting | fusing point (Tm) of polyolefin show the value measured as follows.
That is, the weight average molecular weight (Mw) of the polyolefin is measured by gel permeation chromatography (GPC) under the following conditions. A high temperature GPC system “HLC-8321GPC / HT” is used as the GPC apparatus, and o-dichlorobenzene is used as the eluent. The polyolefin is once melted and filtered into o-dichlorobenzene at a high temperature (temperature of 140 ° C. to 150 ° C.), and the filtrate is used as a measurement sample. The measurement conditions were a sample concentration of 0.5% and a flow rate of 0.6 ml / min. Sample injection volume 10 μl, using RI detector. The calibration curve is “polystylen standard sample TSK standard” manufactured by Tosoh Corporation: “A-500”, “F-1”, “F-10”, “F-80”, “F-380”, “A-”. It is created from 10 samples of “2,500”, “F-4”, “F-40”, “F-128”, and “F-700”.
In addition, the melting point (Tm) of the polyolefin is calculated from the DSC curve obtained by differential scanning calorimetry (DSC) according to the “melting peak” described in the method for determining the melting temperature in JIS K 7121-1987 “Method for measuring plastic transition temperature”. Calculated by “temperature”.

The content of the thermoplastic resin may be determined according to the use of the resin molded body, but is preferably 5% by mass or more and 95% by mass or less, and preferably 10% by mass with respect to the total mass of the resin composition. It is more preferably 95% by mass or less, and further preferably 20% by mass or more and 95% by mass or less.
In addition, when using polyolefin as a thermoplastic resin, it is preferable to make 20 mass% or more into polyolefin with respect to the total mass of a thermoplastic resin.

-Terminal sterol-modified resin-
The terminal sterol-modified resin is a resin in which the main chain includes at least one of an amide bond and an imide bond, and at least one terminal of the main chain is modified with a sterol residue.
The terminal sterol-modified resin will be described in detail.

-Terminal modification The terminal sterol-modified resin is formed by modifying at least one terminal of the main chain with a sterol residue.
Sterols are also called steroid alcohols, and are compounds having a basic skeleton with the structure shown below. In the present embodiment, naturally occurring sterols or synthetic sterols may be used.

A sterol has a hydroxyl group (-OH) as shown above. This hydroxyl group has at least one of an amide bond and an imide bond in the main chain and has a functional group at the terminal (for example, an unmodified product of a resin having at least one of an amide bond and an imide bond in the main chain) By reacting, a sterol residue (that is, a group obtained by removing a hydroxyl group (—OH) from sterol) is introduced at the terminal of the terminal sterol-modified resin.
For example, when the main chain resin is polyamide, polyimide, or the like, it has a carboxy group (including anhydride) or amino group at the terminal, so the hydroxyl group of sterol reacts with these functional groups. By doing so, a terminal sterol-modified resin is obtained.

Compounds (raw materials) used for terminal modification, that is, sterols include, for example, cholesterol, β-sitosterol, campesterol, stigmasterol, brassicasterol, androsterone, β-cholesterol, corticosterone acetate, dehydroepiandrosterone, epiandro Examples include sterone, ersterol, estrone, 11α-hydroxymethyltestosterone, 11α-hydroxyprogesterone, lanosterol, mestranol, methyltestosterone, Δ9 ⁽¹¹⁾ -methyltestosterone, noretosterone, pregesterone, and testosterone.
Among these, cholesterol and β-cholesterol are preferable from the viewpoint of improving the flexural modulus, and cholesterol is more preferable.
The chemical structure formulas of typical ones are shown below.

  The method of terminal modification, that is, the method of reacting the unmodified product of the resin as the main chain with the compound (sterol) used for terminal modification is not particularly limited, and a known method can be adopted.

In the terminal sterol-modified resin, the ratio of the number of terminals modified with sterol residues to the total number of terminals (terminal modification rate = number of terminals modified with sterol residues / total number of terminals × 100 [%]) is 10 % Is preferably in the range of from 100% to 100%, more preferably in the range of from 30% to 100%, and still more preferably in the range of from 50% to 80%.
When the terminal modification rate is 10% or more (more preferably 30% or more, and still more preferably 50% or more), the flexural modulus of the resin molded body can be improved more easily. On the other hand, when the terminal modification rate is 100% or less (more preferably 80% or less), advantages such as suppression of aggregation of terminal sterol residues and suppression of whitening can be obtained.

Said terminal modification | denaturation rate can be measured with the following method.
The terminal sterol-modified resin is hydrolyzed, separated into a dicarboxylic acid, a diamine, and a compound (sterol) used for terminal modification and quantified to obtain a composition ratio constituting the terminal sterol-modified resin. The total number of terminals is calculated based on the equivalent ratio of dicarboxylic acid and diamine, and the number of blocked terminals (modified terminals) is calculated based on the amount of the compound used for terminal modification.

-Main chain Next, the main chain of the terminal sterol-modified resin will be described.
The terminal sterol-modified resin contains at least one of an amide bond and an imide bond in the main chain.
By using a resin containing an imide bond or an amide bond in the main chain, the flexural modulus of the resin molded body is improved.
Specific examples of the resin (unmodified product) serving as the main chain of the terminal sterol-modified resin include thermoplastic resins containing at least one of an amide bond and an imide bond in the main chain. Specifically, polyamide ( PA), polyimide (PI), polyamideimide (PAI), polyetherimide (PEI), polyamino acid and the like.

The terminal sterol-modified resin is preferably a resin having low compatibility with a thermoplastic resin (a base material in the resin composition), specifically a resin having a solubility parameter (SP value) different from that of the thermoplastic resin. .
Here, the difference in SP value between the thermoplastic resin and the terminal sterol-modified resin is preferably 3 or more and more preferably 3 or more and 6 or less from the viewpoint of compatibility between the two and repulsive force between the two.
The SP value here is a value calculated by Fedor's method. Specifically, the solubility parameter (SP value) is, for example, Polym. Eng. Sci. , Vol. 14, p. 147 (1974), the SP value is calculated by the following formula.
Formula: SP value = √ (Ev / v) = √ (ΣΔei / ΣΔvi)
(Wherein Ev: evaporation energy (cal / mol), v: molar volume (cm ³ / mol), Δei: evaporation energy of each atom or atomic group, Δvi: molar volume of each atom or atomic group)
The solubility parameter (SP value) employs (cal / cm ³ ) ^1/2 as a unit, but the unit is omitted in accordance with common practice and expressed in a dimensionless manner.

As the terminal sterol-modified resin, a thermoplastic resin (matrix material in the resin composition) having low compatibility and a different SP value is preferable. Therefore, a thermoplastic resin of a different type from the thermoplastic resin as the matrix material is used. It is preferable to use it.
Among these, polyamide (PA) is preferable as the resin (unmodified product) that becomes the main chain of the terminal sterol-modified resin from the viewpoint of further improving the flexural modulus.

  Examples of the polyamide include polyamides obtained by cocondensation polymerization of dicarboxylic acid and diamine, polyamides obtained by ring-opening polycondensation of lactam, and polyamides obtained by condensing dicarboxylic acid, diamine and lactam. That is, examples of the polyamide include polyamides having at least one of a structural unit obtained by polycondensation of dicarboxylic acid and diamine and a structural unit obtained by ring opening of lactam.

  Polyamide is a structural unit obtained by polycondensation of dicarboxylic acid and diamine, or a structural unit obtained by ring opening of lactam, and has a structural unit containing an aromatic ring excluding aramid, a polyamide having a structural unit not containing an aromatic ring Any of polyamides having a structural unit containing an aromatic ring excluding an aramid structural unit and a structural unit not containing an aromatic ring may be used. From the viewpoint of improving the flexural modulus when a resin molded body is used, an aramid structure A polyamide having a structural unit including an aromatic ring excluding a unit and a structural unit not including an aromatic ring is preferable.

  In particular, when a polyamide having a structural unit including an aromatic ring excluding an aramid structural unit and a structural unit not including an aromatic ring is applied as the polyamide, the affinity with a thermoplastic resin can be adjusted. Here, a polyamide having only a structural unit containing an aromatic ring tends to have a lower affinity with a thermoplastic resin than a polyamide having only a structural unit not containing an aromatic ring. A polyamide having only a structural unit not containing an aromatic ring tends to have a higher affinity for a thermoplastic resin than a polyamide having only a structural unit containing an aromatic ring. Therefore, the affinity with the thermoplastic resin can be adjusted by applying polyamide having both structural units and adjusting the ratio thereof.

Further, when a polyamide having a structural unit containing an aromatic ring excluding an aramid structural unit and a structural unit not containing an aromatic ring is applied as the polyamide, the melt viscosity is lowered and moldability (for example, injection moldability) is also improved. Therefore, it becomes easy to obtain a resin molded body with high appearance quality.
When a polyamide having only an aramid structural unit is applied as the polyamide, the thermoplastic resin is thermally deteriorated at a high temperature at which the polyamide can be melted. Further, at a temperature that causes thermal degradation of the thermoplastic resin, the polyamide cannot be sufficiently melted, the moldability (for example, injection moldability) is deteriorated, and the appearance quality and mechanical performance of the resulting resin molded body are deteriorated.

The aromatic ring refers to a 5-membered or more monocyclic aromatic ring (cyclopentadiene, benzene) and a condensed ring (naphthalene or the like) in which a plurality of 5-membered or more monocyclic aromatic rings are condensed. Aromatic rings include heterocycles (such as pyridine).
The aramid structural unit refers to a structural unit obtained by a condensation polymerization reaction between a dicarboxylic acid containing an aromatic ring and a diamine containing an aromatic ring.

Here, examples of the structural unit containing an aromatic ring excluding the aramid structural unit include at least one of the following structural units (1) and (2).
Structural unit (1): — (— NH—Ar ¹ —NH—CO—R ¹ —CO —) —
(In the structural unit (1), Ar ¹ represents a divalent organic group containing an aromatic ring. R ¹ represents a divalent organic group containing no aromatic ring.)
Structural unit (2): — (— NH—R ² —NH—CO—Ar ² —CO —) —
(In the structural unit (2), Ar ² represents a divalent organic group containing an aromatic ring. R ² represents a divalent organic group containing no aromatic ring.)

On the other hand, examples of the structural unit not containing an aromatic ring include at least one of the following structural units (3) and (4).
Structural unit (3): — (— NH—R ³¹ —NH—CO—R ³² —CO —) —
(In the structural unit (3), R ³¹ represents a divalent organic group containing no aromatic ring. R ³² represents a divalent organic group containing no aromatic ring.)
Structural unit (4): — (— NH—R ⁴ —CO —) —
(In the structural unit (4), R ⁴ represents a divalent organic group containing no aromatic ring)

In Structural Formulas (1) to (3), the “divalent organic group” indicated by each symbol is an organic group derived from a divalent organic group possessed by dicarboxylic acid, diamine, or lactam. Specifically, for example, in the structural unit (1), “a divalent organic group containing an aromatic ring” represented by Ar ¹ represents a residue obtained by removing two amino groups from a diamine, and R ¹ represents “ The “divalent organic group not containing an aromatic ring” indicates a residue obtained by removing two carboxy groups from a dicarboxylic acid. Further, for example, in the structural unit (4), the “divalent organic group not containing an aromatic ring” represented by R ⁴ is sandwiched between the “NH group” and the “CO group” when the lactam is opened. An organic group is shown.

  The polyamide may be a copolymerized polyamide or a mixed polyamide. As the polyamide, a copolyamide and a mixed polyamide may be used in combination. Among these, as the polyamide, a mixed polyamide is preferable from the viewpoint of improving the flexural modulus when the resin molded body is obtained.

The copolymerized polyamide is, for example, a copolymerized polyamide obtained by copolymerizing a first polyamide having a structural unit including an aromatic ring excluding an aramid structural unit and a second polyamide having a structural unit not including an aromatic ring.
The mixed polyamide is, for example, a mixed polyamide including a first polyamide having an aromatic ring and a second polyamide having no aromatic ring.
Hereinafter, for convenience, the first polyamide may be referred to as “aromatic polyamide” and the second polyamide may be referred to as “aliphatic polyamide”.

In the copolymerized polyamide, the ratio of the aromatic polyamide to the aliphatic polyamide (aromatic polyamide / aliphatic polyamide) is 20/80 to 99 / mass by mass ratio from the viewpoint of improving the flexural modulus when the resin molded body is obtained. 1 or less (preferably 50/50 or more and 96/4 or less) is good.
On the other hand, in the mixed polyamide, the ratio between the aromatic polyamide and the aliphatic polyamide (aromatic polyamide / aliphatic polyamide) is 20/80 to 99 in terms of mass ratio from the viewpoint of improving the flexural modulus when the resin molded body is obtained. / 1 or less (preferably 50/50 or more and 96/4 or less).

In the aromatic polyamide, the proportion of the structural unit containing an aromatic ring is preferably 80% by mass or more (preferably 90% by mass or more, more preferably 100% by mass or more) with respect to all the structural units.
On the other hand, in the aliphatic polyamide, the proportion of structural units not containing an aromatic ring is preferably 80% by mass or more (preferably 90% by mass or more, more preferably 100% by mass or more) with respect to all structural units.

  Examples of the aromatic polyamide include a condensation polymer of a dicarboxylic acid containing an aromatic ring and a diamine not containing an aromatic ring, a condensation polymer of a dicarboxylic acid not containing an aromatic ring and a diamine containing an aromatic ring, and the like.

  Examples of the aliphatic polyamide include a condensation polymer of a dicarboxylic acid not containing an aromatic ring and a diamine not containing an aromatic ring, and a ring-opening polycondensation product of a lactam not containing an aromatic ring.

Here, examples of the dicarboxylic acid containing an aromatic ring include phthalic acid (terephthalic acid, isophthalic acid, etc.), biphenyl dicarboxylic acid, and the like.
Examples of the dicarboxylic acid not containing an aromatic ring include oxalic acid, adipic acid, suberic acid, sebacic acid, 1,4-cyclohexanedicarboxylic acid, malonic acid, succinic acid, glutaric acid, pimelic acid, azelaic acid and the like.
Examples of the diamine containing an aromatic ring include p-phenylenediamine, m-phenylenediamine, m-xylenediamine, diaminodiphenylmethane, and diaminodiphenyl ether.
Examples of the diamine not containing an aromatic ring include ethylene diamine, pentamethylene diamine, hexamethylene diamine, nonane diamine, decamethylene diamine, and 1,4-cyclohexane diamine.

  Examples of lactams that do not contain an aromatic ring include ε-caprolactam, undecane lactam, lauryl lactam, and the like.

  In addition, each dicarboxylic acid, each diamine, and each lactam may be used individually by 1 type, and may be used together 2 or more types.

As aromatic polyamides, MXD6 (condensation polymer of adipic acid and metaxylenediamine), nylon 6T (condensation polymer of terephthalic acid and hexamethylenediamine), nylon 6I (polycondensation of isophthalic acid and hexamethylenediamine) Body), nylon 9T (polycondensate of terephthalic acid and nandiamine), nylon M5T (polycondensate of terephthalic acid and methylpentadiamine), and the like.
Commercially available aromatic polyamides include “MXD6” manufactured by Mitsubishi Gas Chemical Company, “GENESTAR (registered trademark): PA6T” manufactured by Kuraray Co., Ltd., “GENESTAR (registered trademark): PA9T” manufactured by Kuraray Co., Ltd., and “TY-” manufactured by Toyobo Co., Ltd. 502NZ: PA6T "etc. are illustrated.

Examples of aliphatic polyamides include nylon 6 (ring-opening polycondensate of ε-caprolactam), nylon 11 (ring-opening polycondensate of undecane lactam), nylon 12 (ring-opening polycondensate of lauryl lactam), nylon 66 (adipine) Examples thereof include a condensation polymer of acid and hexamethylene diamine) and nylon 610 (condensation polymer of sebacic acid and hexamethylene diamine).
Commercially available products of aliphatic polyamides include “Zytel (registered trademark): 7331J (PA6)” manufactured by Dupont, and “Zytel (registered trademark): 101L (PA66)” manufactured by Dupont.

-Physical property The physical property of terminal sterol modified resin is demonstrated.
The molecular weight of the terminal sterol-modified resin is not particularly limited as long as it is easier to melt by heat than the thermoplastic resin coexisting in the resin composition. If the terminal sterol-modified resin is polyamide, for example, the weight average molecular weight of the terminal sterol-modified resin is preferably in the range of 10,000 to 300,000, and more preferably in the range of 10,000 to 100,000.
Further, the glass transition temperature or melting temperature (melting point) of the terminal sterol-modified resin is not particularly limited as in the case of the molecular weight described above, and it is sufficient that the terminal sterol-modified resin is more easily melted by heat than the thermoplastic resin coexisting in the resin composition. If the terminal sterol-modified resin is a polyamide, for example, the melting point (Tm) of the terminal sterol-modified resin (copolyamide, mixed polyamide) is preferably in the range of 100 ° C. or higher and 400 ° C. or lower, and 150 ° C. or higher and 350 ° C. A range of 0 ° C. or lower is more preferable.

The content of the terminal sterol-modified resin is preferably 0.1 parts by mass or more and 100 parts by mass or less with respect to 100 parts by mass of the thermoplastic resin from the viewpoint of improving the flexural modulus when the resin molded body is obtained. It is more preferably 5 parts by mass or more and 90 parts by mass or less, and further preferably 1 part by mass or more and 80 parts by mass or less.
When the content of the terminal sterol-modified resin is in the above range, the affinity with the thermoplastic resin that is the base material is increased, and the flexural modulus of the resin molded body is improved.

-Compatibilizer-
In the present embodiment, in addition to the two components of the thermoplastic resin and the terminal sterol-modified resin, a compatibilizing agent may be used in combination.
The compatibilizing agent is a resin that increases the affinity between the thermoplastic resin and the terminal sterol-modified resin.
What is necessary is just to determine according to a thermoplastic resin as a compatibilizing agent.
As the compatibilizing agent, those having the same structure as the thermoplastic resin and including a portion having an affinity for the terminal sterol-modified resin in a part of the molecule are preferable.

For example, when polyolefin is used as the thermoplastic resin, a modified polyolefin may be used as the compatibilizing agent.
Here, if the thermoplastic resin is polypropylene (PP), the modified polyolefin (PP) is preferable as the modified polyolefin. Similarly, if the thermoplastic resin is an ethylene / vinyl acetate copolymer resin (EVA), the modified polyolefin is Modified ethylene / vinyl acetate copolymer resin (EVA) is preferred.

Examples of the modified polyolefin include polyolefins into which modified sites including a carboxy group, a carboxylic acid anhydride residue, a carboxylic acid ester residue, an imino group, an amino group, an epoxy group, and the like are introduced.
The modification site introduced into the polyolefin preferably contains a carboxylic acid anhydride residue from the viewpoint of further improving the affinity between the polyolefin and the terminal sterol-modified resin, and the maximum temperature during molding, It preferably contains a maleic anhydride residue.

The modified polyolefin is a method in which a compound containing the above-mentioned modification site is reacted directly with the polyolefin and chemically bonded, or a method in which a graft chain is formed using the compound containing the above-mentioned modification site and this graft chain is bonded to the polyolefin, etc. There is.
Examples of the compound containing the above-mentioned modification site include maleic anhydride, fumaric anhydride, citric anhydride, N-phenylmaleimide, N-cyclohexylmaleimide, glycidyl (meth) acrylate, glycidyl vinyl benzoate, N- [4- (2, 3-epoxypropoxy) -3,5-dimethylbenzyl] acrylamide, alkyl (meth) acrylate, and derivatives thereof.
Among these, modified polyolefins obtained by reacting maleic anhydride, which is an unsaturated carboxylic acid, with polyolefins are preferred.

  Specific examples of the modified polyolefin include maleic anhydride modified polypropylene, maleic anhydride modified polyethylene, maleic anhydride modified ethylene / vinyl acetate copolymer resin (EVA), and adducts or copolymers thereof. .

A commercially available product may be used as the modified polyolefin.
Examples of the modified propylene include Yumex (registered trademark) series (100TS, 110TS, 1001, 1010) manufactured by Sanyo Chemical Industries, Ltd.
Examples of the modified polyethylene include Yumex (registered trademark) series (2000) manufactured by Sanyo Chemical Industries, Ltd., and Modic (registered trademark) series manufactured by Mitsubishi Chemical Corporation.
Examples of the modified ethylene / vinyl acetate copolymer resin (EVA) include the Modic (registered trademark) series of Mitsubishi Chemical Corporation.

  The molecular weight of the compatibilizer is not particularly limited, but is preferably in the range of 50,000 to 100,000, and more preferably in the range of 50,000 to 80,000 from the viewpoint of workability.

The content of the compatibilizing agent is preferably 0.1 parts by weight or more and 50 parts by weight or less, more preferably 0.1 parts by weight or more and 40 parts by weight or less, with respect to 100 parts by weight of the thermoplastic resin. More preferably, it is 1 part by mass or more and 30 parts by mass or less.
The content of the compatibilizing agent is preferably 1 part by mass or more and 50 parts by mass or less, more preferably 5 parts by mass or more and 50 parts by mass or less, with respect to 100 parts by mass of the terminal sterol-modified resin. More preferably, it is 50 parts by mass or less.
When the content of the compatibilizing agent is in the above range, the affinity between the thermoplastic resin and the terminal sterol-modified resin is increased, and the flexural modulus of the resin molded product is improved.

-Other ingredients-
The resin composition according to the present embodiment may include other components in addition to the components described above.
Other components include, for example, flame retardants, flame retardant aids, anti-dripping agents when heated, plasticizers, antioxidants, mold release agents, light proofing agents, weathering agents, colorants, pigments, Modifier, antistatic agent, hydrolysis inhibitor, filler, reinforcing agent (talc, clay, mica, glass flake, milled glass, glass beads, crystalline silica, alumina, silicon nitride, aluminum nitride, boron nitride, etc. ) And other well-known additives.
The other component is, for example, preferably 0 part by mass or more and 10 parts by mass or less, and more preferably 0 part by mass or more and 5 parts by mass or less with respect to 100 parts by mass of the thermoplastic resin. Here, “0 part by mass” means a form that does not contain other components.

(Production method of resin composition)
The resin composition according to this embodiment is produced by melting and kneading the above components.
Here, a known means is used as the melt kneading means, and examples thereof include a twin screw extruder, a Henschel mixer, a Banbury mixer, a single screw extruder, a multi-screw extruder, and a kneader.
What is necessary is just to determine as temperature (cylinder temperature) in the case of melt-kneading according to the melting | fusing point etc. of the resin component which comprises a resin composition.

  In particular, the resin composition according to this embodiment is preferably obtained by a production method including a step of melt-kneading a thermoplastic resin, a terminal sterol-modified resin, and, if necessary, a compatibilizer. When a thermoplastic resin, a terminal sterol-modified resin, and, if necessary, a compatibilizer are melted and kneaded together, the compatibility between the thermoplastic resin, which is a base material, and the terminal sterol-modified resin is improved, and a resin molded body In this case, the flexural modulus can be improved.

[Resin molding]
The resin molded body according to the present embodiment includes a thermoplastic resin and a terminal sterol-modified resin. That is, the resin molded body according to the present embodiment is configured with the same composition as the resin composition according to the present embodiment.

In addition, the resin molding which concerns on this embodiment may prepare the resin composition which concerns on this embodiment, and may be obtained by shape | molding this resin composition.
As the molding method, for example, injection molding, extrusion molding, blow molding, hot press molding, calendar molding, coating molding, cast molding, dipping molding, vacuum molding, transfer molding, or the like may be applied.

The molding method of the resin molded body according to the present embodiment is preferably injection molding because it has a high degree of freedom in shape.
The cylinder temperature of injection molding is, for example, 180 ° C. or higher and 300 ° C. or lower, and preferably 200 ° C. or higher and 280 ° C. or lower. The mold temperature for injection molding is, for example, 30 ° C. or more and 100 ° C. or less, and more preferably 30 ° C. or more and 60 ° C. or less.
The injection molding may be performed using a commercially available apparatus such as NEX150 manufactured by Nissei Resin Industry, NEX300 manufactured by Nissei Resin Industry, SE50D manufactured by Sumitomo Machinery.

  The resin molded body according to the present embodiment is suitably used for applications such as electronic / electrical equipment, office equipment, home appliances, automobile interior materials, and containers. More specifically, casings for electronic / electrical equipment and home appliances; various parts of electronic / electrical equipment and home appliances; interior parts for automobiles; storage cases such as CD-ROM and DVD; tableware; beverage bottles; Wrap material; film; sheet;

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

-Synthesis of terminal sterol modified resin-
(Synthesis Example 1: Terminal sterol-modified resin 1 (terminal sterol-modified PA66))
Hexamethylenediamine (diamine component) 11.27 kg (97 mol), adipic acid (dicarboxylic acid component) 14.61 kg (100 mol), cholesterol (sterol used for terminal modification) 1.86 kg (4.8 mol) 10 g of sodium phosphate and 18 kg of ion-exchanged water were charged into a 50 liter autoclave, pressurized with N ₂ from normal pressure to 0.05 MPa, and then released to return to normal pressure. This operation was performed three times, N ₂ substitution was performed, and then the mixture was dissolved at 135 ° C. and 0.3 MPa with stirring. Thereafter, the solution was continuously supplied by a liquid feed pump, heated to 240 ° C. with heating piping, and heated for 1 hour. Thereafter, the reaction mixture was supplied to a pressurized reaction can, heated to 300 ° C., and a part of water was distilled off so as to maintain the internal pressure of the can at 3 MPa to obtain a condensate. Thereafter, the condensate was added to hot water, washed, frozen with liquid nitrogen, and crushed with a hammer. The obtained resin powder was dried at 120 ° C. for 12 hours to obtain a terminal sterol-modified resin 1 (terminal sterol-modified PA66) having a cholesterol residue at the terminal.
It was 80% when the terminal modification | denaturation rate of the obtained terminal sroll modification | denaturation resin 1 was measured by the above-mentioned method.

(Synthesis Example 2: Terminal sterol-modified resin 2 (terminal sterol-modified MXD6))
The same as Synthesis Example 1 except that the dicarboxylic acid component was changed to 14.61 kg (100 mol) of adipic acid, the diamine component to 13.21 kg (97 mol) of metaxylenediamine, and the sterol to 1.86 kg (4.8 mol) of cholesterol. Thus, a terminal sterol-modified resin 2 (terminal sterol-modified MXD6) having a cholesterol residue at the terminal was obtained.
It was 80% when the terminal modification | denaturation rate of the obtained terminal sterol modification resin 2 was measured by the above-mentioned method.

(Synthesis Example 3: Terminal sterol-modified resin 3 (terminal sterol-modified PA66))
Synthesis Example 1 except that the dicarboxylic acid component was changed to 14.61 kg (100 mol) of adipic acid, the diamine component to 11.27 kg (97 mol) of hexamethylenediamine, and the sterol to 1.99 kg (4.8 mol) of β-sitosterol. In the same manner as described above, a terminal sterol-modified resin 3 (terminal sterol-modified PA66) having a β-sitosterol residue at the terminal was obtained.
When the terminal modification rate of the obtained terminal sterol-modified resin 3 was measured by the method described above, it was 80%.

(Synthesis Example 4: Terminal sterol-modified resin 4 (terminal-modified MXD6))
Synthesis Example 1 except that the dicarboxylic acid component was changed to 14.61 kg (100 mol) of adipic acid, the diamine component was changed to 13.21 kg (97 mol) of metaxylenediamine, and the sterol was changed to 1.99 kg (4.8 mol) of β-sitosterol. In the same manner as above, terminal sterol-modified resin 4 (terminal-modified MXD6) having a β-sitosterol residue at the terminal was obtained.
When the terminal modification rate of the obtained terminal sterol-modified resin 4 was measured by the method described above, it was 80%.

[Examples 1 to 20, Comparative Examples 1 to 13]
Ingredients according to Tables 1 to 5 (numerical values in the table indicate the number of parts) are mixed with a twin-screw kneader (Toshiba Machine, TEM58SS) under the following kneading conditions, and melt kneaded as shown in Tables 1 to 5 The mixture was kneaded at a temperature (cylinder temperature) to obtain pellets of a resin composition.

-Kneading conditions-
・ Screw diameter: φ58mm
・ Rotation speed: 300rpm
・ Discharge nozzle diameter: 1mm

  The obtained pellets were subjected to an ISO multipurpose dumbbell test piece (ISO527 tensile) at an injection molding temperature (cylinder temperature) and a mold temperature of 50 ° C. shown in Tables 1 to 5 using an injection molding machine (NEX150, manufactured by Nissei Plastic Industries). Test, corresponding to ISO178 bending test) (test part thickness 4 mm, width 10 mm) and D2 test piece (length 60 mm, width 60 mm, thickness 2 mm) were molded.

[Evaluation]
The following evaluation was performed using the obtained two kinds of test pieces.
The evaluation results are shown in Tables 1 to 5.

-Compatibility-
The compatibility (miscibility) of the obtained resin composition was evaluated by the following method.
The D2 sample piece was embedded in an epoxy resin, and a precision polished cross section was created with an automatic polishing machine (BUEHLER, Vector).
Next, using SEM (manufactured by Hitachi High-Technologies Corporation, S-3400N, acceleration voltage 15 KV), the polished cross section of the sample piece was randomly photographed at 3 magnifications at a magnification of 1500 times, and using image analysis software (ImageProPlus), The luminance range was set so as to extract all polyamide components (including free components (corresponding to the domain of polyamide)).
Then, components other than free components are manually selected and excluded, and only the free component (equivalent to the domain of polyamide) is selected as the measurement item, the diameter and the number of objects are selected and calculated, and the size of each domain (diameter = equivalent to a circle) The diameter (number) and the number were calculated, and from this, the average value of the size (diameter) of the domain was calculated and evaluated according to the following criteria.
A: The average diameter of the domain is less than 20 μm.
B: The average diameter of the domain is 20 μm or more and less than 50 μm.
C: The average diameter of the domains is 50 μm or more.

-Flexural modulus-
About the obtained ISO multipurpose dumbbell test piece, the bending elastic modulus was measured by the method based on ISO178 using the universal testing apparatus (Shimadzu Corp. make, autograph AG-Xplus).

-Notpy Charpy impact strength (impact resistance)-
Using the obtained ISO multi-purpose dumbbell test piece, in accordance with JIS-K7111 (2006), with an evaluation device (DG-UB2 manufactured by Toyo Seiki Co., Ltd.) at 23 ° C., Charpy without notch from Charpy impact test The impact strength (kJ / m ² ) was measured.

The details of the material types in Tables 1 to 5 are as follows.
-Thermoplastic resin-
・ Polypropylene (Novatech (registered trademark) PP MA3, manufactured by Nippon Polypro Co., Ltd.)
・ Polyethylene (Ultzex 20100J, Prime Polymer Co., Ltd.)

-Unmodified PA (polyamide)-
・ PA66 (DuPont, 101L)
MXD6 (Mitsubishi Gas Chemical Co., Ltd., S6007)

-Compatibilizer-
-Maleic anhydride modified polypropylene (Yumex (registered trademark) 110TS, manufactured by Sanyo Chemical Industries, Ltd.

From the above results, it can be seen that in this example, compared with the comparative example, a high compatibility between the thermoplastic resin as the base material and the terminal sterol-modified resin is realized, and a resin molded body having a high flexural modulus can be obtained. .
Moreover, in the present Example, it turns out that the resin molding excellent in impact resistance is obtained compared with a comparative example.

  In addition, when the molded object produced in Example 8 and 17 was analyzed by the above-mentioned method, the used compatibilizing agent (maleic anhydride modification polypropylene) intervened between terminal sterol modified resin and thermoplastic resin. It was confirmed that

Claims (16)

A thermoplastic resin;
A terminal sterol-modified resin containing at least one of an amide bond and an imide bond in the main chain and at least one terminal of the main chain modified with a sterol residue;
A resin composition comprising:   The resin composition according to claim 1, wherein the thermoplastic resin is a polyolefin.   The resin composition according to claim 1 or 2, wherein the terminal sterol-modified resin is a polyamide containing the amide bond in the main chain.   The resin composition according to any one of claims 1 to 3, wherein a content of the terminal sterol-modified resin is 0.1 parts by mass or more and 100 parts by mass or less with respect to 100 parts by mass of the thermoplastic resin.   The resin composition according to any one of claims 1 to 4, comprising a compatibilizing agent.   The resin composition according to claim 5, wherein the compatibilizer is a modified polyolefin.   The resin composition according to claim 5 or 6, wherein a content of the compatibilizing agent is 0.1 parts by mass or more and 50 parts by mass or less with respect to 100 parts by mass of the thermoplastic resin.   The resin composition according to any one of claims 5 to 7, wherein a content of the compatibilizing agent is 1 part by mass or more and 50 parts by mass or less with respect to 100 parts by mass of the terminal sterol-modified resin. A thermoplastic resin;
A terminal sterol-modified resin containing at least one of an amide bond and an imide bond in the main chain and at least one terminal of the main chain modified with a sterol residue;
A resin molded body containing   The resin molded body according to claim 9, wherein the thermoplastic resin is a polyolefin.   The resin molded product according to claim 9 or 10, wherein the terminal sterol-modified resin is a polyamide containing the amide bond in a main chain.   The resin molded body according to any one of claims 9 to 11, wherein a content of the terminal sterol-modified resin is 0.1 parts by mass or more and 100 parts by mass or less with respect to 100 parts by mass of the thermoplastic resin.   The resin molding of any one of Claims 9-12 containing a compatibilizing agent.   The resin molding according to claim 13, wherein the compatibilizing agent is a modified polyolefin.   The resin molded body according to claim 13 or 14, wherein a content of the compatibilizing agent is 0.1 parts by mass or more and 50 parts by mass or less with respect to 100 parts by mass of the thermoplastic resin.   The resin molded body according to any one of claims 13 to 15, wherein a content of the compatibilizing agent is 1 part by mass or more and 50 parts by mass or less with respect to 100 parts by mass of the terminal sterol-modified resin.