JP6838397B2 - Resin composition and resin molded product - Google Patents

Description

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

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

For example, Patent Document 1 states that "(a) 0.1 to 90% by weight of at least one type of polyolefin, (b) 0.1 to 50% by weight of at least one type of polyamide, and (c) 0.1 to 0% by weight. 15% by weight of at least one modified polyolefin, (d) 5.0 to 75% by weight of at least one reinforcing fiber, (e) 0.1 to 10% by weight of at least one sulfur-containing additive. A long fiber reinforced polyolefin structure having a length of 3 mm or more including the above is disclosed.

Further, Patent Document 2 states that "an acid-modified polyolefin (A) block and a polyamide (B) block are provided, ^{and carbon derived from an amide group by 13} C-NMR and carbon derived from a methyl group, a methylene group and a methine group are used. A modifier for a polyolefin resin containing a polymer (X) having a ratio (α) of 0.5 / 99.5 to 12/88 ”is disclosed. Further, Patent Document 2 discloses "an inorganic fiber-containing polyolefin resin composition containing the modifier (K) for a polyolefin resin, a polyolefin resin (D) and an inorganic fiber (E)." ..
Patent Document 3 states, "In a thermoplastic resin molded product containing carbon fibers, the total content of the carbon fibers contained in the molded product is 0.5 to 30 wt%, and the length further exceeds 1.5 mm. Is disclosed as a carbon fiber-containing thermoplastic resin molded product, which comprises 0.1 to 4.7 wt% of carbon fibers.

Special Table 2003-528965 Japanese Unexamined Patent Publication No. 2014-181307 Japanese Unexamined Patent Publication No. 2000-071245

An object of the present invention is 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. It is an object of the present invention to provide a resin composition capable of obtaining a resin molded body having a high bending elasticity as compared with the case where only a modified polyamide is contained.

The above object is achieved by the following invention.

< 1 >
With thermoplastic resin
A terminal long-chain alkyl-modified resin containing at least one of an amide bond and an imide bond in the main chain and having at least one end of the main chain modified with an alkyl group having 8 or more carbon atoms.
Resin composition containing.

< 2 >
Before Kinetsu thermoplastic resin is a polyolefin resin composition according to <1>.

< 3 >
Before SL-end long chain alkyl-modified resin is a polyamide containing an amide bond in the main chain <1> or the resin composition according to <2>.

< 4 >
The content of the previous SL-end long chain alkyl-modified resin, 100 parts by mass of the thermoplastic resin to at most 100 parts by mass or more 0.1 part by mass <1> to the resin composition according to any one of <3> Stuff.

< 5 >
The resin composition according to any one of < 1 > to < 4 > , which contains a compatibilizer.

< 6 >
Before SL compatibilizing agent is a modified polyolefin resin composition according to <5>.

< 7 >
The content of the previous SL compatibilizer, the heat is less than 50 parts by mass or more 0.1 part by mass with respect to thermoplastic resin 100 parts by mass <5> or resin composition according to <6>.

< 8 >
The content of the previous SL compatibilizer, said distal end is less than 50 parts by 1 part by mass or more relative to 100 parts by weight of long-chain alkyl-modified resin <5> ~ resin composition according to any one of <7> ..

< 9 >
With thermoplastic resin
A terminal long-chain alkyl-modified resin containing at least one of an amide bond and an imide bond in the main chain and having at least one end of the main chain modified with an alkyl group having 8 or more carbon atoms.
Resin molded body containing.

< 10 >
Before Kinetsu thermoplastic resin, a resin molded article according to a polyolefin <9>.

< 11 >
Before SL-end long chain alkyl-modified resin is a polyamide containing an amide bond in the main chain <9> or resin molded article according to <10>.

< 12 >
The content of the previous SL-end long chain alkyl-modified resin is not more than 100 parts by mass or more 0.1 part by mass with respect to 100 parts by mass of the thermoplastic resin <9> - resin molding according to any one of <11> body.

< 13 >
The resin molded article according to any one of < 9 > to < 12 > , which contains a compatibilizer.

< 14 >
Before SL compatibilizer, a resin molded article according to a modified polyolefin <13>.

< 15 >
Before SL phase content of solubilizing agent, the heat is less than 50 parts by mass or more 0.1 part by mass with respect to thermoplastic resin 100 parts by mass <13> or resin molded product according to <14>.

< 16 >
The content of the previous SL compatibilizer, said distal end is less than 50 parts by 1 part by mass or more relative to 100 parts by weight of long-chain alkyl-modified resin <13> ~ resin molded article according to any one of <15> ..

According to the inventions according to < 1 > , < 2 > , and < 3 > , in 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, the amide bond and the imide bond are present. Provided is a resin composition capable of obtaining a resin molded body having a higher bending elasticity as compared with the case where only the terminal-unmodified polyamide is contained as the resin containing at least one of the above in the main chain.
According to the invention according to < 4 > , the flexural modulus is higher than that in the case where the content of the terminal long-chain alkyl-modified resin is less than 0.1 part by mass or more than 100 parts by mass with respect to 100 parts by mass of the thermoplastic resin. A resin composition for obtaining a resin molded product having the same material is provided.
According to the invention according to < 5 > , a resin composition capable of obtaining a resin molded product having a higher flexural modulus as compared with the case where it contains a thermoplastic resin and a terminal long-chain alkyl-modified resin and does not contain a compatibilizer. Is provided.
According to the invention according to < 6 >, there is provided a resin composition capable of obtaining a resin molded product having a higher flexural modulus as compared with the case where an epoxy copolymer is used as a compatibilizer.
According to the invention according to < 7 > , resin molding having a higher flexural modulus than the case where the content of the compatibilizer is less than 0.1 part by mass or more than 50 parts by mass with respect to 100 parts by mass of the thermoplastic resin. A resin composition from which the body is obtained is provided.
According to the invention according to < 8 > , a resin having a high flexural modulus as compared with the case where the content of the compatibilizer is less than 1 part by mass or more than 50 parts by mass with respect to 100 parts by mass of the terminal long-chain alkyl-modified resin. A resin composition for obtaining a molded product is provided.

According to the inventions of < 9 > , < 10 > , and < 11 > , in a resin molded product containing a thermoplastic resin and a resin containing at least one of an amide bond and an imide bond in the main chain, the amide bond and the imide bond are present. Provided is a resin molded product having a higher bending elasticity as compared with the case where only the terminal-unmodified polyamide is contained as the resin containing at least one of the above in the main chain.
According to the invention according to < 12 > , the flexural modulus is higher than that in the case where the content of the terminal long-chain alkyl-modified resin is less than 0.1 part by mass or more than 100 parts by mass with respect to 100 parts by mass of the thermoplastic resin. The resin molded body to have is provided.
According to the invention according to < 13 >, there is provided a resin molded product having a higher flexural modulus as compared with the case where the thermoplastic resin and the terminal long chain alkyl modified resin are contained and the compatibilizer is not contained.
According to the invention according to < 14 > , a resin molded product having a higher flexural modulus is provided as compared with the case where an epoxy copolymer is used as a compatibilizer.
According to the invention according to < 15 > , resin molding having a higher flexural modulus than the case where the content of the compatibilizer is less than 0.1 part by mass or more than 50 parts by mass with respect to 100 parts by mass of the thermoplastic resin. The body is provided.
According to the invention according to < 16 > , a resin having a high flexural modulus as compared with the case where the content of the compatibilizer is less than 1 part by mass or more than 50 parts by mass with respect to 100 parts by mass of the terminal long-chain alkyl-modified resin. Molds are provided.

Hereinafter, embodiments that are examples of the resin composition and the resin molded product of the present invention will be described.

[Resin composition]
The resin composition according to the present embodiment contains a thermoplastic resin and at least one of an amide bond and an imide bond in the main chain, and at least one end of the main chain is modified with an alkyl group having 8 or more carbon atoms. Includes long-chain alkyl-modified resins.
In the present specification, in a terminal long chain alkyl modified resin, an alkyl group having 8 or more carbon atoms modified at at least one end of the main chain is referred to as a "long chain alkyl group".

In recent years, in order to obtain a resin molded product having various performances, a mixed resin composition, a so-called alloy resin, in which a thermoplastic resin as a base material (matrix) and a resin different from the thermoplastic resin are mixed is used. 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, and as a result, the compatibility and compatibility of both resins are inferior. It may cause a decrease in the target strength, especially the flexural modulus.

Therefore, in the present embodiment, in the resin composition containing two components of the thermoplastic resin and the resin containing at least one of the amide bond and the imide bond in the main chain, at least one of the amide bond and the imide bond is contained in the main chain. The resin includes a terminal long chain alkyl modified resin in which at least one end of the main chain is modified with a long chain alkyl group.
With this configuration, a resin composition capable of obtaining a resin molded body having a high flexural modulus can be obtained. The action to obtain such an effect is not clear, but it is presumed as follows.

In the molecular structure of a terminal long-chain alkyl-modified resin, a terminal having a modified long-chain alkyl group usually has a better affinity with a thermoplastic resin than a main chain containing at least one of an amide bond and an imide bond. .. Further, since the long-chain alkyl group is easier to move than the main chain containing at least one of the amide bond and the imide bond, the terminal long-chain alkyl group exists in a state of being oriented toward the thermoplastic resin as the base material. easy. Therefore, the terminal long-chain alkyl group oriented from the terminal long-chain alkyl-modified resin toward the thermoplastic resin is compatible with the thermoplastic resin to form an equilibrium state between attractive force and repulsive force, which serves as a base material. It is considered that the dispersibility of the terminal long-chain alkyl-modified resin in the thermoplastic resin is improved and the compatibility is enhanced.
By enhancing the compatibility between the thermoplastic resin as the base material and the terminal long-chain alkyl-modified resin, the compatibility between the two resins is enhanced even when the resin molded product is formed, and as a result, the mechanical strength is excellent. It is considered that a resin molded product having a particularly high flexural modulus can be obtained.

From the above, it is presumed that in the present embodiment, a resin composition capable of obtaining a resin molded product having a high flexural modulus can be obtained.

Further, the resin composition according to the present embodiment contains two components, 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 is contained. The resin contained in the main chain includes a terminal long-chain alkyl-modified resin in which at least one end of the main chain is modified with a long-chain alkyl group. In the resin composition containing the above two components, a resin molded product having excellent impact resistance as compared with the case where only the terminal-unmodified polyamide is contained as the resin containing at least one of the amide bond and the imide bond in the main chain. Is obtained as a resin composition. The action to obtain such an effect is not clear, but it is presumed as follows.

Usually, in order to improve the elastic modulus of a resin, a method of firmly immobilizing the molecular structure by chemical bonds 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-like structure by forming a large number of cross-linking points between polymer chains. However, if a strong impact force is instantly applied to a resin having a strongly bonded crosslinked structure, the crosslinked 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 the present embodiment, the terminal long-chain alkyl group in the terminal long-chain alkyl-modified resin is mixed (affinity) with the thermoplastic resin with a relatively weak bonding force. Therefore, even if an impact is applied instantaneously, the impact force can be diffused by relaxing the internal structure, so that the impact resistance can be improved while obtaining a high elastic modulus (especially high flexural modulus). it is conceivable that.

In the resin composition (and its resin molded product) according to the present embodiment, for example, a compatibilizer may be partially compatible between the terminal long-chain alkyl-modified resin and the thermoplastic resin. Specifically, for example, a compatibilizer may be interposed between the terminal long-chain alkyl-modified resin and the thermoplastic resin as the base material. The presence of the compatibilizer enhances the affinity between the terminal long-chain alkyl-modified resin and the thermoplastic resin, and makes it easier to improve the flexural modulus when the resin molded product is formed.

In particular, the compatibilizer binds to the terminal long-chain alkyl-modified resin (hydrogen bond, covalent bond due to the reaction of the functional group between the compatibilizer and the terminal long-chain alkyl-modified resin, etc.) and is compatible with the thermoplastic resin. It is preferable that the terminal long-chain alkyl-modified resin and the thermoplastic resin are interposed in this state. In this configuration, for example, as a compatibilizer, it has the same structure or a structure that is compatible with the thermoplastic resin that is the base material, and partially reacts with the functional group of the terminal long-chain alkyl-modified resin in the molecule. It is easy to realize by applying a compatibilizer containing a site.
Specifically, for example, polyolefin is applied as a thermoplastic resin, polyamide in which at least one end of the main chain is modified with a long-chain alkyl group as a terminal long-chain alkyl-modified resin, and maleic anhydride-modified polyolefin as a compatibilizer. In this case, in the maleic anhydride-modified polyolefin (compatibility agent), the carboxy group generated by opening the ring of the maleic anhydride moiety reacts with the amine residue of the polyamide to bond, and the polyolefin moiety is phased with the polyolefin. It is preferable to intervene in a melted state.

Here, the method for confirming that the compatibilizer is interposed between the terminal long-chain alkyl-modified resin and the thermoplastic resin is as follows.
An infrared spectroscopic analyzer (NICOLET 6700FT-IR manufactured by Thermo Fisher Scientific Co., Ltd.) is used as the analyzer. For example, a resin composition (or resin molding) of polypropylene (hereinafter PP) as a thermoplastic resin, terminal long-chain alkyl-modified PA66 as a terminal long-chain alkyl-modified resin, and maleic acid-modified polypropylene (hereinafter MA-PP) as a modified polyolefin. In the case of (form), the IR spectrum of the mixture, the mixture of PP and terminal long-chain alkyl-modified PA66, the mixture of PP and MA-PP, PP alone, the terminal long-chain alkyl-modified PA66 alone, and MA-PP alone can be used as a reference. obtained in KBr tablet method, comparative analysis of the peak area of the wave number 1820 cm ^-1 or 1750 cm ^-1 or less in the range of from anhydride in the mixture (characteristic peaks in MA-PP). In the mixture of PP, terminal long chain alkyl modified PA66 and MA-PP, a decrease in the peak area of acid anhydride is confirmed, and it is confirmed that MA-PP and terminal long chain alkyl modified PA66 are reacting. From this, it can be confirmed that the compatibilizer is interposed between the terminal long-chain alkyl-modified resin and the thermoplastic resin. Specifically, when MA-PP reacts with the terminal long-chain alkyl-modified PA66, the cyclic maleinized portion of MA-PP opens and the amine residue of the terminal long-chain alkyl-modified PA66 chemically bonds. Since the cyclic maleinized portion is reduced, it can be confirmed that a compatibilizer is interposed between the terminal long-chain alkyl-modified resin and the thermoplastic resin.

Hereinafter, details of each component of the resin composition according to the present embodiment will be described.

-Thermoplastic resin (A)-
The thermoplastic resin is the base material of the resin composition (also called a matrix resin).
The thermoplastic resin is not particularly limited, and for example, polyolefin (PO), polyphenylene terephthalide (PPS), polyamide (PA), polyimide (PI), polyamideimide (PAI), polyetherimide (PEI), and the like. Polyetheretherketone (PEEK), polyethersulfone (PES), polyphenylsulfone (PPSU), polysulfone (PSF), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyacetal (POM), polycarbonate (PC) ), Polybutylene terephthalide (PVDF), acrylonitrile butadiene styrene copolymer (ABS), acrylonitrile styrene (AS) and the like.
One type of thermoplastic resin may be used alone, or two or more types may be used in combination.

Among these, polyolefin (PO) is preferable from the viewpoint of further improvement of flexural modulus when made into a resin molded product 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 with respect to the entire resin.
Polyolefins are obtained by addition polymerization of olefins (optionally non-olefin monomers).
Further, the olefin and the monomers other than the olefin for obtaining the polyolefin may be one kind or two or more kinds, respectively.
The polyolefin may be a copolymer or a homopolymer. Further, the polyolefin may be linear or branched.

Here, examples of the olefin include a linear or branched aliphatic olefin and an alicyclic olefin.
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 them, from the viewpoint of cost, α-olefin is preferable, ethylene and propylene are more preferable, and propylene is particularly preferable.

The monomer other than the 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; (Meta) acrylic acid esters such as alkyl (meth) acrylate, benzyl (meth) acrylate, dimethylaminoethyl (meth) acrylate; halovinyls such as vinyl chloride; vinyl esters such as vinyl acetate and vinyl propionate; Vinyl ethers such as vinyl methyl ether; halogenated vinylidene such as vinylidene chloride; N-vinyl compounds such as N-vinylpyrrolidone; and the like can be mentioned.

Suitable polyolefins include polypropylene (PP), polyethylene (PE), polybutene, polyisobutylene, kumaron-inden resin, terpene resin, ethylene-vinyl acetate copolymer resin (EVA) and the like.
Of these, a resin containing only repeating units derived from olefins is preferable, and polypropylene is particularly preferable from the viewpoint 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, application to the resin molded product, and the like. For example, when the thermoplastic resin is a polyolefin, its weight average molecular weight (Mw) is preferably in the range of 10,000 or more and 300,000 or less, and more preferably in the range of 10,000 or more and 200,000 or less.
Further, the glass transition temperature (Tg) or melting point (Tm) of the thermoplastic resin is not particularly limited as in the above molecular weight, and may be determined according to the type of resin, molding conditions, application to the resin molded product, and the like. For example, when the thermoplastic resin is polyolefin, its melting point (Tm) 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.

The weight average molecular weight (Mw) and melting point (Tm) of the polyolefin show the values measured as follows.
That is, the weight average molecular weight (Mw) of the polyolefin is determined 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. or higher and 150 ° C. or lower), and the filtrate is used as a measurement sample. The measurement conditions were a sample concentration of 0.5% and a flow velocity of 0.6 ml / min. , Sample injection volume 10 μl, using an RI detector. The calibration curve is "polystylene standard sample TSK standard" manufactured by Tosoh Corporation: "A-500", "F-1", "F-10", "F-80", "F-380", "A-". It is prepared from 10 samples of "2500", "F-4", "F-40", "F-128", and "F-700".
Further, the melting point (Tm) of the polyolefin is determined from the DSC curve obtained by differential scanning calorimetry (DSC), as described in "Melting peak" described in JIS K 7121-1987 "Method for measuring transition temperature of plastics". Obtained by "temperature".

The content of the thermoplastic resin may be determined according to the intended use of the resin molded product, and is preferably 5% by mass or more and 95% by mass or less, preferably 10% by mass, based on the total mass of the resin composition. More than 95% by mass or less is more preferable, and 20% by mass or more and 95% by mass or less is further preferable.
When polyolefin is used as the thermoplastic resin, it is preferable that 20% by mass or more of the polyolefin is used with respect to the total mass of the thermoplastic resin.

-Terminal long chain alkyl modified resin-
The terminal long-chain alkyl-modified resin is a resin in which the main chain contains at least one of an amide bond and an imide bond, and at least one end of the main chain is modified with a long-chain alkyl group.
This terminal long-chain alkyl-modified resin will be described in detail.

-Terminal modification The terminal long chain alkyl modified resin is formed by modifying at least one end of the main chain with an alkyl group having 8 or more carbon atoms. The carbon number of the alkyl group that modifies the terminal is preferably in the range of 12 or more and 30 or less, and more preferably in the range of 14 or more and 28 or less, from the viewpoint of improving the flexural modulus when the resin molded product is formed.

The long-chain alkyl group may be an alkyl group having a linear, branched, or cyclic structure, but from the viewpoint of improving the flexural modulus when the resin molded product is formed, the long-chain alkyl group has a linear structure. It is preferably an alkyl group having.

The long-chain alkyl group may have a heteroatom other than carbon and hydrogen, and examples thereof include heteroatoms such as nitrogen, oxygen, sulfur, phosphorus, chlorine, iodine, and bromine. However, from the viewpoint of improving the flexural modulus when the resin molded product is formed, an alkyl group having no heteroatom other than carbon and hydrogen is preferable.

Examples of the long-chain alkyl group modified at the end of the terminal long-chain alkyl-modified resin include an octyl group (8 carbon atoms), a nonyl group (9 carbon atoms), a decyl group (10 carbon atoms), and a lauryl group (12 carbon atoms). ), Mythyl group (14 carbons), Pentadecyl group (15 carbons), Palmytyl group (16 carbons), Marqueryl group (17 carbons), Stearyl group (18 carbons), Icosyl group (20 carbons), Examples thereof include a behenyl group (22 carbon atoms), a lignoceryl group (24 carbon atoms), a serotynyl group (26 carbon atoms), an octacolinyl group (28 carbon atoms), and a melinyl group (30 carbon atoms).
Among these, a palmitic group (16 carbon atoms), a stearyl group (18 carbon atoms), or an icosyl group (20 carbon atoms) is preferable from the viewpoint of improving the flexural modulus when the resin molded product is formed.

As a compound (raw material) used for terminal modification, a reaction is carried out on a functional group possessed by an unmodified resin having a long-chain alkyl group and containing at least one of an amide bond and an imide bond as a main chain. Examples thereof include compounds having a property. For example, when the resin serving as the main chain is polyamide, polyimide, or the like, a compound having reactivity with such a functional group has a carboxy group (including anhydride), an amino group, or the like at the end. Can be mentioned.

Examples of the compound used for terminal modification include carboxylic acid, amine, alcohol and the like, and are selected according to the functional group possessed by the unmodified product of the resin as the main chain at the end.
For example, if the unmodified product of the resin serving as the main chain is a polyamide having a carboxy group (-COOH) and an amino group (-NH) at the ends, a carboxylic acid or amine is used as the compound for end modification. ..

Specific examples of the compound used for terminal modification include palmitic acid (16 carbon atoms), palminylamine (16 carbon atoms), stearic acid (18 carbon atoms), stearylamine (18 carbon atoms), and itacic acid (18 carbon atoms). 20) carbon number, itacinylamine (20 carbon number) and the like can be mentioned.

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

In the terminal long-chain alkyl-modified resin, the ratio of the number of terminals modified with a long-chain alkyl group to the total number of terminals (terminal modification rate = number of terminals modified with a long-chain alkyl group / number of terminals × 100 [%]) Is preferably in the range of 10% or more and 100% or less, more preferably in the range of 30% or more and 100% or less, and further preferably in the range of 50% or more and 80% or less.
When the terminal modification rate is 10% or more (more preferably 30% or more, still more preferably 50% or more), the flexural modulus of the resin molded product is more likely to be improved. On the other hand, when the terminal denaturation rate is 100% or less (more preferably 80% or less), advantages such as prevention of whitening due to aggregation of the terminal long-chain alkyl group can be obtained.

The above-mentioned terminal denaturation rate can be measured by the following method.
The composition ratio constituting the terminal long-chain alkyl-modified resin is determined by hydrolyzing the terminal long-chain alkyl-modified resin, separating it into a dicarboxylic acid, a diamine, and a terminal-modified compound (compound used for terminal modification) and quantifying it. .. The total number of terminals is calculated from the equivalent ratio of dicarboxylic acid to diamine, and the number of sealed terminals (modified terminals) is calculated from the amount of terminal-modified compound.

-Main chain Next, the main chain of the terminal long-chain alkyl-modified resin will be described.
The terminal long-chain alkyl-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 product is improved.
Specific types of resins (unmodified products) that serve as the main chain of terminal long-chain alkyl-modified resins include thermoplastic resins that contain at least one of an amide bond and an imide bond in the main chain. Examples thereof include polyamide (PA), polyimide (PI), polyamideimide (PAI), polyetherimide (PEI), and polyamino acids.

The terminal long-chain alkyl-modified resin is a resin having low compatibility with a thermoplastic resin (base material in the resin composition), specifically, a resin having a solubility parameter (SP value) different from that of the thermoplastic resin. Is preferable.
Here, the difference in SP value between the thermoplastic resin and the terminal long-chain alkyl-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 referred to here is a value calculated by Fedor's method. Specifically, the solubility parameter (SP value) is, for example, Polym. Eng. Sci. , Vol. 14, p. Based on the description of 147 (1974), the SP value is calculated by the following formula.
Formula: SP value = √ (Ev / v) = √ (ΣΔei / ΣΔvi)
(In the formula, 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)
As the solubility parameter (SP value), (cal / cm ³ ) ^1/2 is adopted as the unit, but the unit is omitted according to the practice and is expressed dimensionlessly.

As the terminal long-chain alkyl-modified resin, it is preferable that the compatibility with the thermoplastic resin (base material in the resin composition) is low and the SP value is different, so that the type of thermoplastic resin is different from that of the base material thermoplastic resin. It is preferable to use a resin.
Among them, polyamide (PA) is preferable as the resin (unmodified product) that becomes the main chain of the terminal long-chain alkyl-modified resin from the viewpoint of further improving the flexural modulus.

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

Polyamide is a structural unit obtained by decomposing dicarboxylic acid and diamine, or a structural unit in which lactam is opened, and has a structural unit containing an aromatic ring other than aramid, and a polyamide having a structural unit not containing an aromatic ring. , A polyamide 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, but from the viewpoint of improving the bending elasticity when formed into a resin molded body, the aramid structure is used. A polyamide having a structural unit containing an aromatic ring excluding the unit and a structural unit not containing an aromatic ring is preferable.

In particular, when a polyamide having a structural unit containing an aromatic ring excluding the aramid structural unit and a structural unit not containing an aromatic ring is applied as the polyamide, the affinity with the 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 containing no aromatic ring tends to have a higher affinity with 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 a 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 the moldability (for example, injection moldability) is also improved. Therefore, it becomes easy to obtain a resin molded product having high appearance quality.
When a polyamide having only an aramid structural unit is applied as the polyamide, thermal deterioration of the thermoplastic resin is caused at a high temperature at which the polyamide can be melted. Further, at a temperature at which thermal deterioration of the thermoplastic resin is caused, the polyamide cannot be sufficiently melted, the moldability (for example, injection moldability) is deteriorated, and the appearance quality and mechanical performance of the obtained resin molded product are deteriorated.

The aromatic ring refers to a monocyclic aromatic ring (cyclopentadiene, benzene) having a 5-membered ring or more, and a condensed ring (naphthalene or the like) in which a plurality of monocyclic aromatic rings having a 5-membered ring or more are condensed. The aromatic ring also includes a heterocycle (pyridine, etc.).
Further, the aramid structural unit indicates a structural unit obtained by a polycondensation 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 indicates a divalent organic group containing an ^{aromatic ring. R 1} indicates a divalent organic group not containing an aromatic ring.)
-Structural unit (2):-(-NH-R ^2- NH-CO-Ar ² -CO-)-
(In the structural unit (2), Ar ² indicates a divalent organic group containing an ^{aromatic ring. R 2} indicates a divalent organic group not containing an 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 indicates a divalent organic group ^{that does not contain an aromatic ring. R 32} indicates a divalent organic group that does not contain an aromatic ring.)
-Structural unit (4):-(-NH-R ^4- CO-)-
(The structural unit (4), R ⁴ represents a divalent organic group not containing an aromatic ring)

In the structural formulas (1) to (3), the "divalent organic group" indicated by each reference numeral is an organic group derived from the divalent organic group of dicarboxylic acid, diamine, or lactam. Specifically, for example, in the structural unit (1), the ^{"divalent organic group containing an aromatic ring" indicated by Ar 1} indicates a residue obtained by removing two amino groups from the diamine, and the "divalent organic group" indicated by R ¹ indicates ". "Aromatic ring-free divalent organic group" indicates a residue obtained by removing two carboxy groups from a dicarboxylic acid. Further, for example, in the structural unit (4), R ⁴ represents "divalent organic group containing no aromatic ring" is sandwiched de When lactam is ring-opened with "NH group" and "CO group" Indicates an organic group.

The polyamide may be either a copolymerized polyamide or a mixed polyamide. As the polyamide, a copolymerized polyamide 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 product is formed.

The copolymerized polyamide is, for example, a copolymerized polyamide obtained by copolymerizing a first polyamide having a structural unit containing an aromatic ring excluding an aramid structural unit and a second polyamide having a structural unit not containing an aromatic ring.
The mixed polyamide is, for example, a mixed polyamide containing 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 or more and 99 / by mass ratio from the viewpoint of improving the bending elasticity when the resin molded product is formed. 1 or less (preferably 50/50 or more and 96/4 or less) is preferable.
On the other hand, in the mixed polyamide, the ratio of the aromatic polyamide to the aliphatic polyamide (aromatic polyamide / aliphatic polyamide) is 20/80 or more and 99 in terms of mass ratio from the viewpoint of improving the bending elasticity when the resin molded body is formed. It is preferably 1/1 or less (preferably 50/50 or more and 96/4 or less).

In the aromatic polyamide, the ratio of the structural unit containing the 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 the total structural unit.
On the other hand, in the aliphatic polyamide, the ratio of the structural unit containing no 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 the total structural unit.

Examples of the aromatic polyamide include a condensed polymer of a dicarboxylic acid containing an aromatic ring and a diamine not containing an aromatic ring, a condensed 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 polycondensate of a dicarboxylic acid containing no aromatic ring and a diamine not containing an aromatic ring, and a ring-opened polycondensate of lactam containing no aromatic ring.

Here, examples of the dicarboxylic acid containing an aromatic ring include phthalic acid (terephthalic acid, isophthalic acid, etc.), biphenyldicarboxylic acid, and the like.
Examples of the aromatic ring-free dicarboxylic acid include oxalic acid, adipic acid, suberic acid, sebacic acid, 1,4-cyclohexanedicarboxylic acid, malonic acid, succinic acid, glutaric acid, pimelic acid, and azelaic acid.
Examples of the diamine containing an aromatic ring include p-phenylenediamine, m-phenylenediamine, m-xylenediamine, diaminodiphenylmethane, and diaminodiphenyl ether.
Examples of diamines that do not contain an aromatic ring include ethylenediamine, pentamethylenediamine, hexamethylenediamine, nonanediamine, decamethylenediamine, and 1,4-cyclohexanediamine.

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

Each dicarboxylic acid, each diamine, and each lactam may be used alone or in combination of two or more.

As aromatic polyamides, MXD6 (condensation polymer of adipic acid and metaxylenediamine), nylon 6T (polycondensation 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 are exemplified.
Commercially available aromatic polyamide products include "MXD6" manufactured by Mitsubishi Gas Chemical Company, "GENESTAR (registered trademark): PA6T" manufactured by Kuraray, "GENESTAR (registered trademark): PA9T" manufactured by Kuraray, and "TY-" manufactured by Toyobo. 502NZ: PA6T ”and the like are exemplified.

Examples of the aliphatic polyamide include nylon 6 (ε-caprolactam ring-opening polycondensate), nylon 11 (undecanlactam ring-opening polycondensate), nylon 12 (lauryllactam ring-opening polycondensate), and nylon 66 (adipin). (Condensation polymer of acid and hexamethylenediamine), nylon 610 (condensation polymer of sebacic acid and hexamethylenediamine) and the like are exemplified.
Commercially available aliphatic polyamide products include DuPont's "Zytel (registered trademark): 7331J (PA6)" and DuPont's "Zytel (registered trademark): 101L (PA66)".

-Physical characteristics The physical characteristics of the terminal long-chain alkyl-modified resin will be explained.
The molecular weight of the terminal long-chain alkyl-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. When the terminal long-chain alkyl-modified resin is polyamide, for example, the weight average molecular weight of the terminal long-chain alkyl-modified resin is preferably in the range of 10,000 or more and 300,000 or less, and more preferably in the range of 10,000 or more and 100,000 or less.
Further, the glass transition temperature or the melting temperature (melting point) of the terminal long-chain alkyl-modified resin is not particularly limited as in the above molecular weight, and may be easier to melt than the thermoplastic resin coexisting in the resin composition. If the terminal long-chain alkyl-modified resin is a polyamide, for example, the melting point (Tm) of the terminal long-chain alkyl-modified resin (copolymerized polyamide or mixed polyamide polyamide) is preferably in the range of 100 ° C. or higher and 400 ° C. or lower. A range of 150 ° C. or higher and 350 ° C. or lower is more preferable.

The content of the terminal long-chain alkyl-modified resin is preferably 0.1 part 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 bending elasticity when the resin molded body is formed. It is more preferably 0.5 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 long-chain alkyl-modified resin is in the above range, the affinity with the thermoplastic resin as the base material is enhanced, and the flexural modulus of the resin molded product can be improved.

-Solution agent-
In the present embodiment, in addition to the two components of the thermoplastic resin and the terminal long-chain alkyl-modified resin, a compatibilizer may be further used in combination.
The compatibilizer is a resin that enhances the affinity between the thermoplastic resin and the terminal long-chain alkyl-modified resin.
The compatibilizer may be determined according to the thermoplastic resin.
The compatibilizer preferably has the same structure as the thermoplastic resin and contains a portion of the molecule having an affinity for the terminal long-chain alkyl-modified resin.

For example, when polyolefin is used as the thermoplastic resin, modified polyolefin may be used as the compatibilizer.
Here, if the thermoplastic resin is polypropylene (PP), modified polypropylene (PP) is preferable as the modified polyolefin, and similarly, if the thermoplastic resin is ethylene-vinyl acetate copolymer resin (EVA), the modified polyolefin is used. A modified ethylene-vinyl acetate copolymer resin (EVA) is preferable.

Examples of the modified polyolefin include a polyolefin having a modified site containing 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 introduced therein.
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 long-chain alkyl-modified resin and the upper limit temperature during molding. In particular, it preferably contains a maleic anhydride residue.

The modified polyolefin can be obtained by reacting a compound containing the above-mentioned modified site with a polyolefin to directly chemically bond the modified polyolefin, or using a compound containing the above-mentioned modified site to form a graft chain and binding the graft chain to the polyolefin. 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 vinylbenzoate, and N- [4- (2,2). 3-Epoxypropoxy) -3,5-dimethylbenzyl] acrylamide, alkyl (meth) acrylates, and derivatives thereof.
Among the above, modified polyolefin obtained by reacting maleic anhydride, which is an unsaturated carboxylic acid, with polyolefin is preferable.

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 acid-modified polyolefins such as adducts or copolymers thereof. ..

As the modified polyolefin, a commercially available product may be used.
Examples of the modified propylene include Youmex (registered trademark) series (100TS, 110TS, 1001, 1010) manufactured by Sanyo Chemical Industries, Ltd.
Examples of the modified polyethylene include Youmex (registered trademark) series (2000) manufactured by Sanyo Chemical Industries, Ltd., Modic (registered trademark) series manufactured by Mitsubishi Chemical Corporation, and the like.
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 5,000 or more and 100,000 or less, and more preferably in the range of 5,000 or more and 80,000 or less, from the viewpoint of processability.

The content of the compatibilizer is preferably 0.1 part by mass or more and 50 parts by mass or less, more preferably 0.1 part by mass or more and 40 parts by mass or less, and 0 by mass with respect to 100 parts by mass of the thermoplastic resin. It is more preferable that the amount is 1 part by mass or more and 30 parts by mass or less.
The content of the compatibilizer 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, based on 100 parts by mass of the terminal long chain alkyl-modified resin. It is more preferable that the amount is 50 parts by mass or more.
When the content of the compatibilizer is in the above range, the affinity between the thermoplastic resin and the terminal long-chain alkyl-modified resin is enhanced, and the flexural modulus of the resin molded product can be improved.

-Other ingredients-
The resin composition according to the present embodiment may contain other components in addition to the above-mentioned components.
Other components include, for example, flame retardants, flame retardants, anti-drip agents when heated, plastic agents, antioxidants, mold release agents, lightfasteners, weatherproofing agents, colorants, pigments, etc. Modifiers, antistatic agents, antioxidants, fillers, reinforcing agents (talc, clay, mica, glass flakes, milled glass, glass beads, crystalline silica, alumina, silicon nitride, aluminum nitride, boron nitride, etc. ) And other well-known additives.
The other components are, for example, 0 parts by mass or more and 10 parts by mass or less, and more preferably 0 parts by mass or more and 5 parts by mass or less with respect to 100 parts by mass of the thermoplastic resin. Here, "0 parts by mass" means a form containing no other components.

(Manufacturing method of resin composition)
The resin composition according to the present embodiment is produced by melt-kneading each of the above components.
Here, as the means for melt-kneading, known means are used, and examples thereof include a twin-screw extruder, a Henschel mixer, a Banbury mixer, a single-screw extruder, a multi-screw extruder, and a conider.
The temperature (cylinder temperature) at the time of melt-kneading may be determined according to the melting point of the resin component constituting the resin composition and the like.

In particular, the resin composition according to the present embodiment is preferably obtained by a production method including a step of melt-kneading a thermoplastic resin, a terminal long-chain alkyl-modified resin, and, if necessary, a compatibilizer. When the thermoplastic resin, the terminal long-chain alkyl-modified resin, and, if necessary, the compatibilizer are collectively melt-kneaded, the compatibility between the base material thermoplastic resin and the terminal long-chain alkyl-modified resin is improved. , The flexural modulus when made into a resin molded body can be improved.

[Resin molded product]
The resin molded product according to the present embodiment includes a thermoplastic resin and a terminal long-chain alkyl-modified resin. That is, the resin molded product according to the present embodiment has the same composition as the resin composition according to the present embodiment.

The resin molded product according to the present embodiment may be obtained by preparing the resin composition according to the present embodiment and molding the resin composition.
As the molding method, for example, injection molding, extrusion molding, blow molding, hot press molding, calender molding, coating molding, cast molding, dipping molding, vacuum molding, transfer molding and the like may be applied.

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

The resin molded product 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, housings for electronic / electrical equipment and home appliances; various parts for electronic / electrical equipment and home appliances; interior parts for automobiles; storage cases for CD-ROMs and DVDs; tableware; beverage bottles; food trays Wrap material; film; sheet; etc.

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

(Synthesis Example 1: Terminal Long Chain Alkylation Modified Resin 1 (Terminal Long Chain Alkylation Modified PA66))
Hexamethylenediamine (diamine component) 11.62 kg (100 mol), adipic acid (dicarboxylic acid component) 14.18 kg (97 mol), stearic acid (terminal modified compound) 1.37 kg (4.8 mol), diphosphorous acid as a catalyst 10 g of sodium 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 to perform N ₂ substitution, and then the mixture was dissolved at 135 ° C. and 0.3 MPa with stirring. Then, the solution was continuously supplied by a liquid feed pump, the temperature was raised to 240 ° C. by a heating pipe, and heat was applied for 1 hour. Then, the reaction mixture was supplied to the pressurized reaction can, heated to 300 ° C., and a part of water was distilled off so as to maintain the pressure inside the can at 3 MPa to obtain a condensate. Then, this condensate was added to hot water, washed, frozen in liquid nitrogen, and pulverized with a hammer. The obtained resin powder was dried at 120 ° C. for 12 hours to obtain a terminal long-chain alkyl-modified resin 1 (terminal long-chain alkyl-modified PA66) having a long-chain alkyl group at the terminal.
The terminal modification rate of the obtained terminal long-chain alkyl-modified resin 1 was measured by the above-mentioned method and found to be 80%.

(Synthesis Example 2: Terminal Long Chain Alkylation Modified Resin 2 (Terminal Long Chain Alkylation Modified MXD6)
Synthesis example except that the dicarboxylic acid component was changed to 14.18 kg (97 mol) of adipic acid, the diamine component was changed to 13.62 kg (100 mol) of metaxylylenediamine, and the terminal-modified compound was changed to 1.37 kg (4.8 mol) of stearic acid. A terminal long-chain alkyl-modified resin 2 (terminal long-chain alkyl-modified MXD6) having a long-chain alkyl group at the terminal was obtained in the same manner as in 1.
The terminal modification rate of the obtained terminal long-chain alkyl-modified resin 2 was measured by the above-mentioned method and found to be 80%.

(Synthesis Example 3: Terminal Long Chain Alkylation Modified Resin 3 (Terminal Long Chain Alkylation Modified PA66))
Synthesis example except that the dicarboxylic acid component was changed to 14.18 kg (97 mol) of adipic acid, the diamine component was changed to 13.62 kg (100 mol) of metaxylylenediamine, and the terminal modified compound was changed to 0.83 kg (4.8 mol) of decanoic acid. A terminal long-chain alkyl-modified resin 3 (terminal long-chain alkyl-modified PA66) having a long-chain alkyl group at the terminal was obtained in the same manner as in 1.
The terminal modification rate of the obtained terminal long-chain alkyl-modified resin 3 was measured by the above-mentioned method and found to be 80%.

(Synthesis Example 4: Terminal Alkylation Modified Resin 4 (Terminal Alkylation Modified PA66))
Synthesis example except that the dicarboxylic acid component was changed to 14.18 kg (97 mol) of adipic acid, the diamine component was changed to 13.62 kg (100 mol) of metaxylene diamine, and the terminal modified compound was changed to 0.56 kg (4.8 mol) of caproic acid. A terminal alkyl-modified resin 4 (terminal alkyl-modified PA66) having an alkyl group having 6 carbon atoms at the terminal was obtained in the same manner as in 1.
The terminal modification rate of the obtained terminal alkyl-modified resin 4 was measured by the above-mentioned method and found to be 80%.

[Examples 1 to 20, Comparative Examples 1 to 14]
The components according to Tables 1 to 5 (the numerical values in the table indicate the number of copies) are kneaded in a twin-screw kneader (manufactured by Toshiba Machine Co., Ltd., TEM58SS) under the following kneading conditions and melt kneading shown in Tables 1 to 5. Kneading was performed at a temperature (cylinder temperature) to obtain pellets of the resin composition.

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

The obtained pellets are subjected to an injection molding machine (manufactured by Nissei Resin Industry Co., Ltd., NEX150) at the injection molding temperature (cylinder temperature) shown in Tables 1 to 5 and the mold temperature of 50 ° C. A D2 test piece (length 60 mm, width 60 mm, thickness 2 mm) was formed into a test (corresponding to the ISO178 bending test) (test portion thickness 4 mm, width 10 mm).

[Evaluation]
The following evaluations were carried out using the obtained two types 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 epoxy resin, and a precision polishing cross section was prepared by an automatic polishing machine (manufactured by BUEHLER, Vector).
Next, using SEM (Hitachi High-Technologies Corporation, S-3400N, acceleration voltage 15KV), the polished cross section of the sample piece was randomly photographed in three fields at a magnification of 1500 times, and image analysis software (ImageProPlus) was used. The brightness range was set to extract all the polyamide components (including free components (corresponding to the polyamide domain)).
After that, the components other than the free component are manually selected and excluded, and the diameter and the number of objects are selected and calculated with only the free component (corresponding to the domain of polyamide) as the measurement item, and the size of each domain (diameter = equivalent to the circle). The diameter) and the number were obtained, and the average value of the domain size (diameter) was calculated from this, 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 domain is 50 μm or more.

− Flexural modulus −
The flexural modulus of the obtained ISO multipurpose dumbbell test piece was measured by a method conforming to ISO178 using a universal test device (manufactured by Shimadzu Corporation, Autograph AG-Xplus).

-Charpy impact strength without notch (impact resistance)-
Using the obtained ISO multipurpose dumbbell test piece, in accordance with JIS-K7111 (2006), with an evaluation device (DG-UB2 manufactured by Toyo Seiki Co., Ltd.) at 23 ° C. 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 (Novatec (registered trademark) PP MA3, manufactured by Japan Polypropylene Corporation)
-Polyethylene (Ultozex 20100J, made by Prime Polymer Co., Ltd.)

-Unmodified PA (polyamide)-
・ PA66 (manufactured by DuPont, 101L)
・ MXD6 (manufactured by Mitsubishi Gas Chemical Company, S6007)

-Solution agent-
-Maleic anhydride-modified polypropylene (Youmex (registered trademark) 110TS, manufactured by Sanyo Chemical Industries, Ltd.

From the above results, in this example, higher compatibility between the thermoplastic resin as the base material and the terminal long-chain alkyl-modified resin is realized as compared with the comparative example, and a resin molded product having a high flexural modulus can be obtained. I understand.
Further, in this example, it can be seen that a resin molded product having excellent impact resistance can be obtained as compared with the comparative example.

When the molded products prepared in Examples 8 and 17 were analyzed by the above-mentioned method, the compatibilizer (maleic anhydride-modified polypropylene) used was interposed between the terminal long-chain alkyl-modified resin and the thermoplastic resin. It was confirmed that it was done.

Claims (10)

With thermoplastic resin
A terminal long-chain alkyl-modified resin containing at least one of an amide bond and an imide bond in the main chain and having at least one end of the main chain modified with an alkyl group having 8 or more carbon atoms.
Including
The thermoplastic resin is polyolefin,
The content of the thermoplastic resin is 20% by mass or more and 95% by mass or less with respect to the total mass of the resin composition.
The terminal long-chain alkyl-modified resin is a polyamide having the amide bond in the main chain.
The content of the terminal long-chain alkyl-modified resin is 1 part by mass or more and 80 parts by mass or less with respect to 100 parts by mass of the thermoplastic resin.
Resin composition. The resin composition according to claim 1, which comprises a compatibilizer. The resin composition according to claim 2 , wherein the compatibilizer is a modified polyolefin. The resin composition according to claim 2 or 3 , wherein the content of the compatibilizer is 0.1 part 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 2 to 4 , wherein the content of the compatibilizer is 1 part by mass or more and 50 parts by mass or less with respect to 100 parts by mass of the terminal long chain alkyl-modified resin. With thermoplastic resin
A terminal long-chain alkyl-modified resin containing at least one of an amide bond and an imide bond in the main chain and having at least one end of the main chain modified with an alkyl group having 8 or more carbon atoms.
Including
The thermoplastic resin is polyolefin,
The content of the thermoplastic resin is 20% by mass or more and 95% by mass or less with respect to the total mass of the resin molded product.
The terminal long-chain alkyl-modified resin is a polyamide having the amide bond in the main chain.
The content of the terminal long-chain alkyl-modified resin is 1 part by mass or more and 80 parts by mass or less with respect to 100 parts by mass of the thermoplastic resin.
Resin molded body. The resin molded article according to claim 6, which contains a compatibilizer. The resin molded product according to claim 7 , wherein the compatibilizer is a modified polyolefin. The resin molded product according to claim 7 or 8 , wherein the content of the compatibilizer is 0.1 part 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 product according to any one of claims 7 to 9 , wherein the content of the compatibilizer is 1 part by mass or more and 50 parts by mass or less with respect to 100 parts by mass of the terminal long chain alkyl-modified resin.