JP6511754B2 - Resin composition and resin molded body - Google Patents

Description

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

  Conventionally, various resin compositions containing a cellulose ester resin are provided and used in the manufacture of various resin moldings. For example, Patent Document 1 proposes a thermoplastic resin composition containing a cyclic phosphorus compound and a cellulose-based resin.

JP, 2012-52006, A

  The object of the present invention is to obtain a resin composition excellent in bleed resistance and a resin composition excellent in moldability, as compared to the case where a polyether ester compound is blended alone as a plasticizer into a cellulose ester resin. It is to provide.

  The above-mentioned subject is solved by the following means.

The invention pertaining to < 1 > is
A resin composition comprising a cellulose ester resin, a polyether ester compound, and a maleic anhydride-modified ethylene vinyl acetate copolymer resin.

The invention pertaining to < 2 > is
The resin composition as described in < 1 > whose said cellulose ester resin is a cellulose ester resin represented by following General formula (1).

(In general formula (1), R ¹ , R ² and R ³ each independently represent a hydrogen atom or an acyl group having 1 to 3 carbon atoms. N represents an integer of 1 or more.)

The invention relating to < 3 > is
The cellulose ester resin represented by the general formula (1) has an acetyl group as an acyl group which each of R ¹ , R ² and R ³ independently represents, and the degree of substitution is 2.1 or more. The resin composition as described in < 2 > which is resin of 6 or less.

The invention pertaining to < 4 > is
The resin composition of any one of < 1 > - < 3 > whose said polyetherester compound is a polyetherester compound represented by following General formula (2).

(In General Formula (2), R ⁴ and R ⁵ each independently represent an alkylene group having 2 to 10 carbon atoms. A ¹ and A ² each independently have 1 to 6 carbon atoms. Represents an alkyl group, an aryl group having 6 to 12 carbon atoms, or an aralkyl group having 7 to 18 carbon atoms, m represents an integer of 1 or more)

The invention pertaining to < 5 > is
The polyether ester compound represented by the general formula (2) is a resin composition according to a compound that represents a n- butylene group as the R ⁵ <4>.

The invention pertaining to < 6 > is
The resin composition according to < 4 > or < 5 > , wherein the polyether ester compound represented by the general formula (2) is a compound that represents an aryl group or an aralkyl group as at least one of the A ¹ and the A ² .

The invention concerning < 7 > is
The resin composition of any one of < 1 > - < 6 > whose weight average molecular weight (Mw) of the said polyetherester compound is 450-650.

The invention pertaining to < 8 > is
The resin composition of any one of < 1 > - < 7 > whose viscosity at 25 degrees C of the said polyether ester compound is 35 mPa * s or more and 50 mPa * s or less.

The invention according to < 9 > is
The resin composition of any one of < 1 > - < 8 > whose solubility parameter (SP value) of the said polyether ester compound is 9.5-9.9.

The invention relating to < 10 > is
The mass ratio (cellulose ester resin / polyether ester compound) of the said cellulose ester resin and the said polyether ester compound is 100/25 or more and 100/5 or less, It is described in any one of < 1 > - < 9 > Resin composition.

The invention pertaining to < 11 > is
The mass ratio of the cellulose ester resin to the maleic anhydride modified ethylene vinyl acetate copolymer resin (cellulose ester resin / maleic anhydride modified ethylene vinyl acetate copolymer resin) is 100/8 or more and 100/2 or less The resin composition of any one of < 1 > - < 10 > .

The invention pertaining to < 12 > is
The resin molding containing the resin composition of any one of < 1 > - < 11 > .

According to the invention which concerns on < 1 > , compared with the case where a polyetherester compound is separately mix | blended with a cellulose-ester resin as a plasticizer, the resin molded object excellent in bleed resistance is obtained, and the moldability was excellent. A resin composition is provided.

According to the invention which concerns on < 2 > , compared with the case where a polyether ester compound is separately mix | blended with a cellulose ester resin as a plasticizer, the cellulose ester resin represented by General formula (1) as cellulose ester resin is included, A resin molded product excellent in bleed resistance is obtained, and a resin composition excellent in moldability is provided.
According to the invention which concerns on < 3 > , it is represented by General formula (1), and compared with the case where substitution degree of cellulose-ester resin which has an acetyl group as an acyl group is less than 2.1 or 2.6 or more, it is bleed resistance Thus, a resin molded product excellent in moldability is obtained, and a resin composition excellent in moldability is provided.

According to the invention which concerns on < 4 > , compared with the case where a polyether ester compound is separately mix | blended with cellulose ester resin as a plasticizer, the polyether ester compound represented by General formula (2) as a polyether ester compound It is possible to obtain a resin molded product having excellent bleed resistance, and to provide a resin composition having excellent moldability.
According to the invention of <5>, polyether ester compound represented by the general formula (2) is, as ^{R 5} n- ethylene group (- _{(CH 2) 2} -) or n- decylene (- (CH ₂ ) A resin molded product having excellent bleed resistance is obtained and a resin composition having excellent moldability is provided as compared to the case of a compound representing _10- ).
According to the invention of <6>, polyether ester compound represented by the general formula (2) is compared with the case where the compound represents a t- butyl group as A ¹ and A ^2, bleed resistance excellent resin A molded body is obtained, and a resin composition having excellent moldability is provided.

According to the invention which concerns on < 7 > , compared with the case where the weight average molecular weight (Mw) of a polyetherester compound is less than 450 or more than 650, the resin molded object excellent in bleed resistance is obtained, and it is excellent in moldability. A resin composition is provided.
According to the invention which concerns on < 8 > , compared with the case where the viscosity in 25 degreeC of a polyether ester compound is less than 35 Pa.s or 50 mPa * s, the resin molding excellent in bleed resistance is obtained, and moldability is obtained. An excellent resin composition is provided.
According to the invention which concerns on < 9 > , compared with the case where the solubility parameter (SP value) of a polyether-ester compound is less than 9.5 or 9.9, the resin molding excellent in bleed resistance is obtained, and There is provided a resin composition having excellent moldability.

According to the invention which concerns on < 10 > , compared with the case where mass ratio (cellulose-ester resin / polyether ester compound) of cellulose-ester resin and a polyether-ester compound is less than 100/25 or more than 100/5, it is resistant to bleeding. Thus, a resin molded product excellent in moldability is obtained, and a resin composition excellent in moldability is provided.
According to the invention which concerns on < 11 > , mass ratio (cellulose ester resin / maleic anhydride modified ethylene vinyl acetate) of cellulose ester resin represented by General formula (1) and maleic anhydride modified ethylene vinyl acetate copolymer resin Compared with the case where the copolymer resin is less than 100/8 or more than 100/2, a resin molded article having excellent bleed resistance is obtained, and a resin composition having excellent moldability is provided.

According to the invention which concerns on < 12 > , compared with the case where the resin composition which mix | blended the polyether ester compound as a plasticizer independently with a cellulose ester resin is provided, the resin molding excellent in bleed resistance is provided. .

  Hereinafter, an embodiment which is an example of the present invention will be described. These descriptions and examples illustrate the present invention and do not limit the scope of the present invention.

  In the present specification, when referring to the amount of each component in the composition, when there are a plurality of substances corresponding to each component in the composition, the plurality of types present in the composition unless otherwise specified. Mean the total amount of substance.

<Resin composition>
The resin composition according to the present embodiment contains a cellulose ester resin, a polyether ester compound, and a maleic anhydride-modified ethylene vinyl acetate copolymer resin (also referred to as "maleic anhydride-modified EVA resin").
In addition, the resin composition which concerns on this embodiment contains cellulose-ester resin as a main component. The main component means a component having the largest content ratio (mass standard) among the components contained in the resin composition.

Here, in general, the cellulose ester resin is poor in thermoplasticity because the melt viscosity does not decrease even if it is heated. For this reason, the resin composition of cellulose ester resin alone has low flowability and poor moldability.
When a plasticizer having a high affinity and a low melt viscosity is mixed with the cellulose ester resin, thermoplasticity is imparted. In the cellulose ester resin, as the amount of the plasticizer is increased, the melt viscosity is decreased while the thermoplasticity is improved, that is, the flowability is enhanced. However, due to the influence of temperature, humidity and time, a phenomenon (bleed) in which a plasticizer precipitates may occur on the surface of the pellet of the resin composition or the resin molded product. When this bleed (the phenomenon that the plasticizer precipitates) occurs, 1) deterioration of the appearance of the resin molding, 1) adhesion of the plasticizer to the hand or the like which occurs when touching the pellet of the resin composition or the resin molding 3) It may cause a decrease in mechanical strength of the resin molded body.
As described above, the moldability (thermoplasticity and flowability) and the bleed resistance are in a trade-off relationship, and it is desired that both of them be compatible.

  On the other hand, when a polyetherester compound and a maleic anhydride-modified EVA resin are blended in a cellulose ester resin, a resin molded article excellent in bleed resistance can be obtained, and a resin composition excellent in moldability can be obtained. . The reason is not clear, but I think as follows.

First, when the polyether ester compound is mixed with the cellulose ester resin, the intermolecular force of the cellulose ester resin is appropriately weakened from the height of the affinity of both and the molecular structure of the polyether ester compound, and the thermoplasticity is enhanced. On the other hand, when left in a humid environment for a long time, the polyether ester compound is hydrolyzed to lower the molecular weight, thereby increasing the tendency to bleed.
Therefore, when a maleic anhydride-modified EVA resin is further blended, the maleic anhydride-modified EVA resin disperses in the resin composition nearly uniformly by the reaction of the maleic anhydride portion with the hydroxyl group of the cellulose ester resin. . In addition to this, the maleic anhydride modified EVA resin has a function of adsorbing moisture in the atmosphere, and suppresses the hydrolysis of the polyether ester compound. For this reason, the low molecular weight formation of a polyetherester compound is suppressed and generation | occurrence | production of a bleed is suppressed.

  As mentioned above, the resin composition which concerns on this embodiment is a resin molded object excellent in bleed resistance by the said structure, and is excellent in moldability.

  Hereinafter, the components of the resin composition according to the present embodiment will be described in detail.

[Cellulose ester resin]
The resin composition according to the present embodiment contains a cellulose ester resin. Specifically as a cellulose ester resin, the cellulose ester resin represented by General formula (1) is mentioned, for example.

In general formula (1), R ¹ , R ² and R ³ each independently represent a hydrogen atom or an acyl group having 1 to 3 carbon atoms. n represents an integer of 1 or more.

In the general formula ^(1), the acyl group represented by R 1, ^{R 2,} and ^{R 3,} acetyl group, propionyl group, and butyryl groups. As the acyl group, an acetyl group is desirable from the viewpoint of the moldability of the resin composition and the improvement of the bleed resistance of the resin molded product.

The range of n in the general formula (1) is not particularly limited, but is preferably 250 or more and 750 or less, and more preferably 350 or more and 600 or less.
When n is 250 or more, the strength of the resin molded product tends to be increased. When n is equal to or less than 750, the decrease in the flexibility of the resin molded product is easily suppressed.

Here, in the general formula (1), that R ¹ , R ² and R ³ independently represent an acyl group means that at least a part of the hydroxyl groups of the cellulose ester resin represented by the general formula (1) is an acyl It shows that it is
That is, n R ^{1 s} in the cellulose ester resin molecule may be all identical, partially identical or different from each other. Similarly, n pieces of R ² and n pieces of A ³ may be all identical, partially identical or different from each other.

The degree of substitution of the cellulose ester resin is desirably 2.1 or more and 2.6 or less, and more desirably 2.2 or more and 2.5 or less.
When the degree of substitution is 2.1 or more, the affinity to the polyether ester compound is likely to be enhanced. When the degree of substitution is 2.6 or less, crystallization of the cellulose ester resin is suppressed and thermoplasticity is easily developed. Therefore, when the degree of substitution is in the above range, the moldability of the resin composition and the bleed resistance of the resin molded product are further improved.
The degree of substitution is an index showing the degree of acylation of the cellulose ester resin. Specifically, the degree of substitution means the intramolecular average of the number of substituted groups in which three hydroxyl groups in the D-glucopyranose unit of the cellulose ester resin are substituted with an acyl group.

Here, from the viewpoint of the improvement of the moldability of the resin composition and the bleed resistance of the resin molded product, in particular, the cellulose ester resin is acetyl as an acyl group represented by R ¹ , R ² and R ³ independently. It is desirable that the resin has a group and the degree of substitution is 2.1 or more and 2.6 or less.

  The weight average molecular weight (Mw) of the cellulose ester resin is preferably 100,000 or more and 300,000 or less, and more preferably 150,000 or more and 200,000 or less, from the viewpoint of improving the mechanical strength of the resin molded body. The weight average molecular weight is a value measured by the same method as the method of measuring the weight average molecular weight of the polyether ester compound.

  Hereinafter, although the specific example of cellulose ester resin is shown, it is not necessarily restricted to this.

[Polyether ester compound]
The resin composition according to the present embodiment contains a polyether ester compound. Specifically as a polyether ester compound, the polyether ester compound represented by General formula (2) is mentioned, for example.

In General Formula (2), R ⁴ and R ⁵ each independently represent an alkylene group having 2 to 10 carbon atoms. Each of A ¹ and A ² independently represents an alkyl group having 1 to 6 carbon atoms, an aryl group having 6 to 12 carbon atoms, or an aralkyl group having 7 to 18 carbon atoms. m represents an integer of 1 or more.

In the general formula (2), the alkylene group represented by R ⁴ is preferably an alkylene group having 3 to 10 carbon atoms, and more preferably an alkylene group having 3 to 6 carbon atoms. The alkylene group represented by R ⁴ may be linear, branched or cyclic, and is preferably linear.
When the carbon number of the alkylene group represented by R ⁴ is 3 or more, the decrease in fluidity of the resin composition is suppressed, and thermoplasticity is easily exhibited. When the number of carbon atoms of the alkylene group represented by R ⁴ is 10 or less or the alkylene group represented by R ⁴ is linear, the affinity to the cellulose ester resin is likely to be enhanced. Therefore, when the alkylene group represented by R ⁴ is linear and the number of carbon atoms is in the above range, the moldability of the resin composition and the bleed resistance of the resin molded product are further improved when the substitution degree is in the above range. .
From these viewpoints, in particular, the alkylene group represented by R ⁴ is preferably n-hexylene group (— (CH ₂ ) ₆ —). That is, it is desirable that the polyether ester compound is a compound that represents n-hexylene group (-(CH ₂ ) _6- ) as R ⁴ .

In the general formula (2), the alkylene group represented by R ⁵ is preferably an alkylene group having 3 to 10 carbon atoms, and more preferably an alkylene group having 3 to 6 carbon atoms. The alkylene group represented by R ⁵ may be linear, branched or cyclic, and is preferably linear.
When the carbon number of the alkylene group represented by R ⁵ is 3 or more, the decrease in fluidity of the resin composition is suppressed, and thermoplasticity is easily exhibited. When the number of carbon atoms of the alkylene group represented by R ⁵ is 10 or less or the alkylene group represented by R ⁵ is linear, the affinity to the cellulose ester resin is likely to be enhanced. Therefore, when the alkylene group represented by R ⁵ is linear and the number of carbon atoms is in the above range, the moldability of the resin composition and the bleed resistance of the resin molded product are further improved when the substitution degree is in the above range. .
From these viewpoints, in particular, the alkylene group represented by R ⁵ is preferably an n-butylene group (— (CH ₂ ) ₄ —). In other words, a polyether ester compound, as ^{R 5} n-butylene _{(- (CH 2) 4 -} ) is preferably a compound which represents the.

The alkyl group represented by A ¹ and A ^{2 in the} general formula (2) is preferably an alkyl group having 1 to 10 carbon atoms, and more preferably an alkyl group having 3 to 6 carbon atoms. The alkyl group represented by A ¹ and A ² may be linear, branched or cyclic, and is preferably branched.
Examples of the aryl group represented by A ¹ and A ² include unsubstituted aryl groups such as a phenyl group and a naphthyl group; and substituted phenyl groups such as a methylphenyl group and a t-butylphenyl group.
A ^1, and the aralkyl ^{group A 2} represents ^a group represented by -R A -Ph. R ^A represents a linear or branched alkylene group having 1 to 6 carbon atoms (preferably 1 to 6 carbon atoms). Ph represents an unsubstituted phenyl group: a linear or branched substituted phenyl group substituted with an alkyl group having 1 to 6 carbon atoms (preferably 2 to 4 carbon atoms). Specific examples of the aralkyl group include unsubstituted aralkyl groups such as benzyl group, phenylmethyl group (phenethyl group), phenylpropyl group and phenylbutyl group; substituted aralkyl groups such as methylbenzyl group, dimethylbenzyl group and methylphenethyl group Groups are mentioned.

It is desirable that at least one of A ¹ and A ² represents an aryl group or an aralkyl group. In other words, a polyether ester compound, A ^1, and it is desirable for (preferably phenyl group) an aryl group as at least one A ² is a compound representing or aralkyl group, an aryl group both as A ^1, and A ² ( Desirably, it is a compound that represents a phenyl group) or an aralkyl group [particularly, an aryl group (desirably a phenyl group)]. The polyether ester compound which represents an aryl group (desirably a phenyl group) or an aralkyl group as at least one of A ¹ and A ² tends to generate an appropriate space between the molecules of the cellulose ester resin, and further causes crystallization of cellulose. Suppress. Therefore, the moldability of the resin composition and the bleed resistance of the resin molded product are further improved.

In General Formula (2), the range of m is not particularly limited, but is preferably 1 or more and 5 or less, and for example, 1 or more and 3 or less.
When m is 1 or more, it is difficult to bleed (deposit) the polyether ester compound. When m is 5 or less, affinity with the cellulose ester resin is likely to be enhanced. For this reason, when m is in the above range, the moldability of the resin composition and the bleed resistance of the resin molded product are further improved.

  Next, the characteristics of the polyether ester compound will be described.

The weight average molecular weight (Mw) of the polyether ester compound is preferably 450 or more and 650 or less, and more preferably 500 or more and 600 or less.
When the weight average molecular weight (Mw) is 450 or more, bleeding (the phenomenon of precipitation) is difficult. When the weight average molecular weight (Mw) is 650 or less, affinity with the cellulose ester resin is likely to be enhanced. For this reason, when the weight average molecular weight (Mw) is in the above range, the moldability of the resin composition and the bleed resistance of the resin molded product are further improved.
In addition, a weight average molecular weight (Mw) is a value measured by a gel permeation chromatograph (GPC). Specifically, the molecular weight measurement by GPC is carried out using a Tosoh column, HPLC 1100, as a measuring device, using a Tosoh column, TSKgel GMHHR-M + TSKgel GMHHR-M (7.8 mm ID 30 cm), using a chloroform solvent . And a weight average molecular weight is computed using the molecular weight calibration curve created by the monodispersed polystyrene standard sample from this measurement result.

The viscosity at 25 ° C. of the polyether ester compound is preferably 35 mPa · s or more and 50 mPa · s or less, and more preferably 40 mPa · s or more and 45 mPa · s or less.
When the viscosity is 35 mPa · s or more, the dispersibility in the cellulose ester resin is likely to be improved. When the viscosity is 50 mPa · s or less, the anisotropy of dispersion of the polyether ester compound hardly appears. For this reason, when the viscosity is in the above range, the moldability of the resin composition and the bleed resistance of the resin molded product are further improved.
The viscosity is a value measured by an E-type viscometer.

The solubility parameter (SP value) of the polyether ester compound is preferably 9.5 or more and 9.9 or less, and more preferably 9.6 or more and 9.8 or less.
When the solubility parameter (SP value) is 9.5 or more and 9.9 or less, the dispersibility in the cellulose ester resin is easily improved. For this reason, when the solubility parameter (SP value) is in the above range, the moldability of the resin composition and the bleed resistance of the resin molded product are further improved.
The solubility parameter (SP value) is a value calculated by the method of Fedor. Specifically, the solubility parameter (SP value) is, for example, Polym. Eng. Sci. , Vol. 14, p. Based on the description in 147 (1974), the SP value is calculated by the following equation.
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) adopts (cal / cm ³ ) ^1/2 as a unit, but the unit is omitted in accordance with the practice, and is written without dimension.

Here, in particular, from the viewpoint of improving the moldability of the resin composition and the bleed resistance of the resin molded product, the polyether ester compound represents an n-butylene group as R ⁵ , and at least at least ^one of A ¹ and A ² . The compound which represents an aryl group or an aralkyl group as one side and whose weight average molecular weight (Mw) is 450 or more and 650 or less is desirable.
From the same point of view, the polyether ester compound is preferably a compound having a viscosity of 35 mPa · s to 50 mPa · s at 25 ° C. and a solubility parameter (SP value) of 9.5 to 9.9.

  Hereinafter, although the specific example of a polyether ester compound is shown, it is not necessarily limited to this.

[Maleic anhydride modified EVA resin]
The resin composition according to the present embodiment contains a maleic anhydride modified EVA resin (maleic anhydride modified ethylene vinyl acetate copolymer resin).

  Maleic anhydride modified EVA resin is ethylene vinyl acetate copolymer resin which carried out graft modification of maleic anhydride, for example. The maleic anhydride-modified EVA resin can be obtained, for example, by grafting maleic anhydride onto an ethylene vinyl acetate copolymer, using an organic peroxide, a radical generated by a thermal decomposition method or the like as an initiator.

The maleic anhydride-modified EVA resin preferably has a density of 0.9 to 0.94 and a melting point of 90 ° C. to 100 ° C., and a density of 0.91 to 0.93 and a melting point of 92 ° C. or more Resins of 98 ° C. or less are more desirable.
When the density and melting point of the resin are 0.9 or more and 0.94 or less, the reactivity of the maleic anhydride-modified EVA resin to the hydroxyl group of the cellulose ester is likely to be enhanced. Moreover, the fall of the fluidity | liquidity of a resin composition is suppressed and it becomes easy to express thermoplasticity. For this reason, when the density and the melting point are in the above ranges, the moldability of the resin composition and the bleed resistance of the resin molded product are further improved.

The density of the maleic anhydride modified EVA resin is a value measured by the float method of JIS K 0061 (2001).
The melting point of the maleic anhydride-modified EVA resin is a value measured by a method according to JIS K 7121 (2012).

  Hereinafter, although the specific example of a maleic anhydride modified EVA resin is shown, it is not necessarily limited to this.

[Contents of Cellulose Ester Resin, Polyether Ester Compound, and Maleic Anhydride Modified EVA Resin]
The mass ratio of the cellulose ester resin to the polyether ester compound (cellulose ester resin / polyether ester compound) is preferably 100/25 to 100/5, and more preferably 100/20 to 100/9.
When the mass ratio is 100/25 or more, it is difficult for the polyether ester compound to bleed (precipitate). When the mass ratio is 100/5 or less, the decrease in fluidity of the resin composition is suppressed, and thermoplasticity is easily developed. For this reason, when the mass ratio is in the above range, the moldability of the resin composition and the bleed resistance of the resin molded product are further improved.

The mass ratio of cellulose ester resin to maleic anhydride-modified EVA resin (cellulose ester resin / maleic anhydride-modified EVA resin) is preferably 100/8 to 100/2, and more preferably 100/6 to 100/2. .
When the mass ratio is 100/8 or more, the decrease in flowability of the resin composition is suppressed, and thermoplasticity is easily developed. When the mass ratio is 100/2 or less, it is difficult for the polyether ester compound to bleed (precipitate). For this reason, when the mass ratio is in the above range, the moldability of the resin composition and the bleed resistance of the resin molded product are further improved.

  The mass ratio of the cellulose ester resin in the entire resin composition is preferably 50% by mass to 95% by mass, and more preferably 60% by mass to 90% by mass.

[Other ingredients]
The resin composition according to the present embodiment may further contain other components other than those described above, as necessary. Other components include, for example, flame retardants, compatibilizers, plasticizers, antioxidants, mold release agents, light resistance agents, weathering agents, colorants, pigments, modifiers, anti-drip agents, anti-static agents, resistance Hydrolysis inhibitors, fillers, reinforcing agents (glass fiber, carbon fiber, talc, clay, mica, glass flakes, milled glass, glass beads, crystalline silica, alumina, silicon nitride, alumina nitride, boron nitride, etc.), etc. Can be mentioned. The content of each of these components is desirably 0% by mass or more and 5% by mass or less with respect to the entire resin composition. Here, "0 mass%" means that other components are not included.

The resin composition according to the present embodiment may contain another resin other than the above resin. However, it is preferable that the other resin is contained in an amount of 5% by mass or less in the total resin.
Other resins include, for example, conventionally known thermoplastic resins, and specifically, polycarbonate resin; polypropylene resin; polyester resin; polyolefin resin; polyester carbonate resin; polyphenylene ether resin; polyphenylene sulfide resin; polysulfone resin Polyether sulfone resin; Polyarylene resin; Polyether imide resin; Polyacetal resin; Polyvinyl acetal resin; Poly ketone resin; Polyether ketone resin; Polyether ether ketone resin; Poly aryl ketone resin; Polyether nitrile resin; Benzimidazole resin; polyparabanic acid resin; selected from the group consisting of aromatic alkenyl compounds, methacrylic acid esters, acrylic acid esters, and vinyl cyanide compounds Vinyl polymer or copolymer resin obtained by polymerizing or copolymerizing one or more vinyl monomers; diene-aromatic alkenyl compound copolymer resin; vinyl cyanide-diene-aromatic alkenyl compound Copolymer resin; aromatic alkenyl compound-diene-vinyl cyanide-N-phenyl maleimide copolymer resin; vinyl cyanide- (ethylene-diene-propylene (EPDM))-aromatic alkenyl compound copolymer resin; chloride Vinyl resins; chlorinated vinyl chloride resins; and the like. One of these resins may be used alone, or two or more thereof may be used in combination.

[Method of producing resin composition]
The resin composition which concerns on this embodiment is manufactured by melt-kneading the mixture of the said component, for example. In addition, the resin composition concerning this embodiment is manufactured by dissolving the above-mentioned ingredient in a solvent, for example. Examples of the means for melt-kneading include known means, and specific examples thereof include a twin-screw extruder, a Henschel mixer, a Banbury mixer, a single-screw extruder, a multi-screw extruder, and a coneda.

<Resin molding>
The resin molded product according to the present embodiment includes the resin composition according to the present embodiment. That is, the resin molded product according to the present embodiment is configured to have the same composition as the resin composition according to the present embodiment.
Specifically, the resin molded product according to the present embodiment is obtained by molding the resin composition according to the present embodiment. As a molding method, for example, injection molding, extrusion molding, blow molding, heat press molding, calender molding, coating molding, cast molding, dipping molding, vacuum molding, transfer molding, etc. may be applied.

  The molding method of the resin molded product according to the present embodiment is preferably injection molding in that the degree of freedom of the shape is high. In particular, it is preferable to apply injection molding from the viewpoint of obtaining a resin molded product having excellent bleed resistance by taking advantage of the moldability (thermoplasticity and flowability) of the resin composition according to the present embodiment. The cylinder temperature for injection molding is, for example, 200 ° C. or more and 250 ° C. or less, and desirably 210 ° C. or more and 230 ° C. or less. The mold temperature for injection molding is, for example, 40 ° C. or more and 60 ° C. or less, and more preferably 45 ° C. or more and 55 ° C. or less. The injection molding may be performed using, for example, a commercially available apparatus such as NEX150 manufactured by Nissei Plastics Industry Co., Ltd., NEX 700000 manufactured by Nissei Plastic Industries Co., Ltd.

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

  EXAMPLES The present invention will be described in more detail by way of examples, but the present invention is not limited to these examples.

<Examples 1 to 33, Comparative Examples 1 to 10>
[Kneading]
Materials having the compositions shown in Tables 1 and 2 are charged into a twin-screw kneader (TEX 41 SS manufactured by Toshiba Machine Co., Ltd.), and the cylinder temperature is kneaded in a range of 220 ° C. or more and 250 ° C. or less. (Referred to as In Tables 1 and 2, "part" means "part by mass".

[injection molding]
The obtained pellet is introduced into an injection molding machine (Nixen Resin Industries, PNX40), and injection molding is performed at a cylinder temperature in the range of 220 ° C. to 250 ° C. and a mold temperature in the range of 40 ° C. to 60 ° C. A D2 molded body (length 60 mm, width 60 mm, thickness 2 mm) was obtained.

[Evaluation]
The following evaluation was performed about the obtained D2 test piece or resin pellet. The results are shown in Tables 1 and 2.

-Formability-
The melt flow rate (MFR: g / 10 min) of the resin pellet was measured using a melt indexer (G-01 manufactured by Toyo Seiki Co., Ltd.) under the condition of 220 ° C./21.2 N, and the moldability was evaluated.

-Bleeding resistance-
The D2 test piece was allowed to stand still in a constant temperature and humidity chamber (ARL-1100-J manufactured by Espec Corporation) set at a temperature of 60 ° C. and a humidity of 95% RH. After 72 hours, the D2 test piece was taken out of the constant temperature and humidity chamber. Then, the surface of the D2 test piece was visually observed to evaluate the bleed resistance. Evaluation criteria are as follows.
5: No occurrence of clouding due to liquid bleed and bleed 4: Clouding due to bleed on part of the surface,
3: Cloudiness caused by bleed on the entire surface,
2: Liquid bleeding occurs in part,
1: The entire surface liquid bleed occurs

  From the above results, it is understood that in the present example, the evaluation results of the moldability (MFR) and the bleed resistance are both good as compared with the comparative example.

The material types in Tables 1 and 2 are as follows.
Compounds 1 to 8: Specific examples of the cellulose ester resin described above Compounds 8 to 23: specific examples of the polyether ester compounds described 24 to 25: specific examples of the maleic anhydride-modified EVA resin described above Example reference · Compound 26: Compound represented by the following structural formula (C1) · Compound 27: compound represented by the following structural formula (C2) · Compound 28: Triphenyl phosphate (TPP, manufactured by Daihachi Chemical Industry Co., Ltd.)

Claims (12)

A cellulose ester resin, a polyether ester compound, and a maleic anhydride modified ethylene vinyl acetate copolymer resin,
The mass ratio of the cellulose ester resin to the polyether ester compound (cellulose ester resin / polyether ester compound) is 100/27 or more and 100/4 or less,
The mass ratio of the cellulose ester resin to the maleic anhydride modified ethylene vinyl acetate copolymer resin (cellulose ester resin / maleic anhydride modified ethylene vinyl acetate copolymer resin) is 100/9 or more and 100/1 or less Resin composition. The resin composition according to claim 1, wherein the cellulose ester resin is a cellulose ester resin represented by the following general formula (1).


(In general formula (1), R ¹ , R ² and R ³ each independently represent a hydrogen atom or an acyl group having 1 to 3 carbon atoms. N represents an integer of 1 or more.) The cellulose ester resin represented by the general formula (1) has an acetyl group as an acyl group which each of R ¹ , R ² and R ³ independently represents, and the degree of substitution is 2.1 or more. The resin composition according to claim 2, which is a resin of 6 or less. The resin composition according to any one of claims 1 to 3, wherein the polyether ester compound is a polyether ester compound represented by the following general formula (2).


(In General Formula (2), R ⁴ and R ⁵ each independently represent an alkylene group having 2 to 10 carbon atoms. A ¹ and A ² each independently have 1 to 6 carbon atoms. Represents an alkyl group, an aryl group having 6 to 12 carbon atoms, or an aralkyl group having 7 to 18 carbon atoms, m represents an integer of 1 or more) The resin composition according to claim 4, wherein the polyether ester compound represented by the general formula (2) is a compound representing an n-butylene group as the R ⁵ . Polyether ester compound represented by the general formula (2) is a resin composition according to claim 4 or claim 5 wherein a compound represents at least one aryl group or an aralkyl group of A ¹ and the A ² .   The resin composition according to any one of claims 1 to 6, wherein the weight average molecular weight (Mw) of the polyether ester compound is 450 or more and 650 or less.   The viscosity at 25 degrees C of the said polyether ester compound is 35 mPa * s or more and 50 mPa * s or less, The resin composition of any one of Claims 1-7.   The resin composition according to any one of claims 1 to 8, wherein the solubility parameter (SP value) of the polyether ester compound is 9.5 or more and 9.9 or less.   The mass ratio (cellulose ester resin / polyether ester compound) of the cellulose ester resin and the polyether ester compound is 100/25 or more and 100/5 or less. Resin composition.   The mass ratio of the cellulose ester resin to the maleic anhydride modified ethylene vinyl acetate copolymer resin (cellulose ester resin / maleic anhydride modified ethylene vinyl acetate copolymer resin) is 100/8 or more and 100/2 or less The resin composition according to any one of claims 1 to 10.   The resin molding containing the resin composition of any one of Claims 1-11.