JP2016069395A - Resin composition and resin molding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resin composition which allows a resin molding with excellent bleeding resistance to be obtained, and has excellent moldability.SOLUTION: A resin composition comprises a cellulose ester resin, a polyether ester compound, and a maleic anhydride modified ethylene vinyl acetate copolymer resin.SELECTED DRAWING: None

Description

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

  Conventionally, various resin compositions containing a cellulose ester resin have been provided and used for the production of various resin moldings. For example, Patent Document 1 proposes a thermoplastic resin composition containing a cyclic phosphorus compound and a cellulose resin.

JP 2012-52006 A

  An object of the present invention is to provide a resin composition excellent in bleed resistance and moldability compared with a case where a polyether ester compound alone is added to a cellulose ester resin as a plasticizer. Is to provide.

  The above problem is solved by the following means.

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

The invention according to claim 2
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 invention according to claim 3
The cellulose ester resin represented by the general formula (1) has an acetyl group as an acyl group that 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 invention according to claim 4
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 represents an alkylene group having 2 to 10 carbon atoms. A ¹ and A ² each independently represent 1 to 6 carbon atoms. 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 according to claim 5
The resin composition according to claim 4, wherein the polyetherester compound represented by the general formula (2) is a compound representing an n-butylene group as the R ⁵ .

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

The invention according to claim 7 provides:
The weight average molecular weight (Mw) of the said polyetherester compound is 450 or more and 650 or less, The resin composition of any one of Claims 1-6.

The invention according to claim 8 provides:
The resin composition according to any one of claims 1 to 7, wherein the polyether ester compound has a viscosity at 25 ° C of from 35 mPa · s to 50 mPa · s.

The invention according to claim 9 is:
The resin composition according to any one of claims 1 to 8, wherein a solubility parameter (SP value) of the polyether ester compound is from 9.5 to 9.9.

The invention according to claim 10 is:
The mass ratio (cellulose ester resin / polyether ester compound) between the cellulose ester resin and the polyether ester compound is 100/25 or more and 100/5 or less. Resin composition.

The invention according to claim 11 is:
The mass ratio (cellulose ester resin / maleic anhydride modified ethylene vinyl acetate copolymer resin) of the cellulose ester resin and the 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 invention according to claim 12
The resin molding containing the resin composition of any one of Claims 1-11.

  According to the first aspect of the present invention, compared to a case where a polyether ester compound alone is added to the cellulose ester resin as a plasticizer, a resin molded article having excellent bleed resistance is obtained, and the moldability is excellent. A resin composition is provided.

According to the invention according to claim 2, the cellulose ester resin includes a cellulose ester resin represented by the general formula (1) as compared with a case where a polyether ester compound is blended alone as a plasticizer. A resin molded article excellent in bleeding resistance is obtained, and a resin composition excellent in moldability is provided.
According to the invention of claim 3, the bleed resistance compared to the case where the substitution degree of the cellulose ester resin represented by the general formula (1) and having an acetyl group as an acyl group is less than 2.1 or more than 2.6. A resin composition excellent in moldability is obtained, and a resin composition excellent in moldability is provided.

According to the invention which concerns on Claim 4, compared with the case where a polyetherester compound is mix | blended with a cellulose ester resin as a plasticizer independently, the polyetherester compound represented by General formula (2) is represented as a polyetherester compound. In addition, a resin molded article excellent in bleed resistance is obtained, and a resin composition excellent in moldability is provided.
According to the invention of claim 5, the polyether ester compound represented by the general formula (2) is, as ^{R 5} n- ethylene group (- _{(CH 2) 2} -) or n- decylene (- (CH ₂ ) Compared with the compound representing _10- ), a resin molded article having excellent bleed resistance is obtained, and a resin composition having excellent moldability is provided.
According to the invention of claim 6, the 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, excellent bleed resistance resin A molded body is obtained and a resin composition excellent in moldability is provided.

According to the invention of claim 7, compared with the case where the weight average molecular weight (Mw) of the polyetherester compound is less than 450 or more than 650, a resin molded article having excellent bleed resistance is obtained, and the moldability is excellent. A resin composition is provided.
According to the invention according to claim 8, a resin molded article having excellent bleed resistance can be obtained and the moldability can be obtained as compared with the case where the viscosity of the polyether ester compound at 25 ° C is less than 35 Pa · s or more than 50 mPa · s. An excellent resin composition is provided.
According to the invention according to claim 9, a resin molded article having excellent bleed resistance can be obtained as compared with the case where the solubility parameter (SP value) of the polyetherester compound is less than 9.5 or more than 9.9, and A resin composition having excellent moldability is provided.

According to the invention which concerns on Claim 10, compared with the case where mass ratio (cellulose ester resin / polyether ester compound) of a cellulose ester resin and a polyether ester compound is less than 100/25 or more than 100/5, bleeding resistance A resin composition excellent in moldability is obtained, and a resin composition excellent in moldability is provided.
According to the invention of claim 11, the mass ratio of the cellulose ester resin represented by the general formula (1) and the maleic anhydride-modified ethylene vinyl acetate copolymer resin (cellulose ester resin / maleic anhydride modified ethylene vinyl acetate) Compared to 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 Claim 12, compared with the case where the cellulose ester resin contains the resin composition which mix | blended the polyetherester compound independently as a plasticizer, the resin molding excellent in bleeding resistance is provided. .

  Embodiments that are examples of the present invention will be described below. These descriptions and examples are illustrative of the invention and are not intended to limit the scope of the 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 kinds present in the composition unless otherwise specified. Means the total amount of substances.

<Resin composition>
The resin composition according to the present embodiment includes 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 a cellulose ester resin as a main component. A main component means a component with the largest content rate (mass basis) in each component contained in a resin composition.

Here, generally, a cellulose ester resin is poor in thermoplasticity because its melt viscosity does not decrease even when heated. For this reason, the resin composition of cellulose ester resin alone has low fluidity and poor moldability.
When a plasticizer having good affinity and 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 lowered, while the thermoplasticity is improved, that is, the fluidity is increased. However, a phenomenon (bleed) in which a plasticizer is deposited on the surface of the resin composition pellets or the resin molded body may occur due to the influence of temperature, humidity, and time. When this bleed (a phenomenon in which a plasticizer precipitates) occurs, 1) the appearance of the resin molded body is reduced, and 1) the plasticizer adheres to the hand or the like when the pellets of the resin composition or the resin molded body are touched. 3) The mechanical strength of the resin molding may be reduced.
Thus, moldability (thermoplasticity and fluidity) and bleed resistance are in a trade-off relationship, and it is desired to satisfy both of these requirements.

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

First, when a polyether ester compound is mixed with a cellulose ester resin, the intermolecular force of the cellulose ester resin is moderately weakened due to the high affinity between them and the molecular structure of the polyether ester compound, thereby increasing the thermoplasticity. On the other hand, when left in a high humidity environment for a long time, the polyether ester compound is hydrolyzed, and the tendency to bleed is increased by lowering the molecular weight.
Therefore, when a maleic anhydride-modified EVA resin is further blended, the maleic anhydride-modified EVA resin is dispersed in a nearly uniform state in the resin composition by reacting the maleic anhydride portion with the hydroxyl group of the cellulose ester resin. . In addition, the maleic anhydride-modified EVA resin has a function of adsorbing moisture in the atmosphere and suppresses hydrolysis of the polyetherester compound. For this reason, the molecular weight reduction of a polyetherester compound is suppressed and generation | occurrence | production of a bleed is suppressed.

  From the above, the resin composition according to the present embodiment has a resin molded body having excellent bleed resistance and excellent moldability due to the above configuration.

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

[Cellulose ester resin]
The resin composition according to the present embodiment contains a cellulose ester resin. Specific examples of the cellulose ester resin include a cellulose ester resin represented by the 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.

In general formula (1), examples of the acyl group represented by R ¹ , R ² , and R ³ include an acetyl group, a propionyl group, and a butyryl group. The acyl group is preferably an acetyl group from the viewpoint of improving the moldability of the resin composition and the bleed resistance of the resin molded body.

In the general formula (1), the range of n is not particularly limited, but is preferably from 250 to 750, more preferably from 350 to 600.
When n is 250 or more, the strength of the resin molded body tends to increase. When n is 750 or less, a decrease in flexibility of the resin molded body is easily suppressed.

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

The degree of substitution of the cellulose ester resin is preferably from 2.1 to 2.6, and more preferably from 2.2 to 2.5.
When the substitution degree is 2.1 or more, the affinity with the polyether ester compound is likely to increase. When the substitution degree is 2.6 or less, crystallization of the cellulose ester resin is suppressed, and thermoplasticity is easily developed. For this reason, when the substitution degree is within the above range, the moldability of the resin composition and the bleed resistance of the resin molded body are further improved.
The degree of substitution is an index indicating the degree of acylation of the cellulose ester resin. Specifically, the degree of substitution means an intramolecular average of the number of substitutions in which three hydroxyl groups in the D-glucopyranose unit of the cellulose ester resin are substituted with acyl groups.

Here, from the viewpoint of improving the moldability of the resin composition and the bleed resistance of the resin molded body, in particular, the cellulose ester resin has an acetyl group as an acyl group that R ¹ , R ² , and R ³ each independently represents. A resin having a group and a substitution degree of 2.1 or more and 2.6 or less is desirable.

  The weight average molecular weight (Mw) of the cellulose ester resin is preferably 100,000 or more and 300,000 or less, more preferably 150,000 or more and 200,000 or less, from the viewpoint of improving the mechanical strength of the resin molded product. A weight average molecular weight is the value measured by the method similar to the measuring method of the weight average molecular weight of a polyetherester 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 this embodiment contains a polyetherester compound. Specifically as a polyetherester compound, the polyetherester 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. A ¹ and A ² each independently represent 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 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, but is preferably linear.
When the number of carbon atoms of the alkylene group represented by R ⁴ is 3 or more, a decrease in fluidity of the resin composition is suppressed, and thermoplasticity is easily exhibited. When the alkylene group represented by R ⁴ has 10 or less carbon atoms or the alkylene group represented by R ⁴ is linear, the affinity with the cellulose ester resin is likely to increase. For this reason, when the alkylene group represented by R ⁴ is linear and the number of carbon atoms is in the above range, when the substitution degree is in the above range, the moldability of the resin composition and the bleed resistance of the resin molded body are further improved. .
From these viewpoints, the alkylene group represented by R ⁴ is particularly preferably an n-hexylene group (— (CH ₂ ) ₆ —). That is, the polyetherester compound is desirably a compound that represents an n-hexylene group (— (CH ₂ ) ₆ —) as R ⁴ .

In 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, but is preferably linear.
When the number of carbon atoms of the alkylene group represented by R ⁵ is 3 or more, a 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 with the cellulose ester resin is likely to increase. For this reason, when the alkylene group represented by R ⁵ is linear and the number of carbon atoms is in the above range, when the substitution degree is in the above range, the moldability of the resin composition and the bleed resistance of the resin molded body are further improved. .
From these viewpoints, the alkylene group represented by R ⁵ is particularly preferably an n-butylene group (— (CH ₂ ) ₄ —). That is, the polyether ester compound is desirably a compound that represents an n-butylene group (— (CH ₂ ) ₄ —) as R ⁵ .

In general formula (2), the alkyl group represented by A ¹ and A 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, but 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.
The aralkyl group represented by A ¹ and A ² is 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 substituted phenyl group substituted with a linear or branched 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.

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 representing a phenyl group) or an aralkyl group [particularly an aryl group (preferably a phenyl group)]. The polyether ester compound which represents an aryl group (preferably 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 promotes crystallization of cellulose. Suppress. For this reason, the moldability of the resin composition and the bleed resistance of the resin molded body are further improved.

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

  Next, the characteristics of the polyetherester compound will be described.

The weight average molecular weight (Mw) of the polyether ester compound is preferably from 450 to 650, more preferably from 500 to 600.
When the weight average molecular weight (Mw) is 450 or more, bleeding (a phenomenon of precipitation) becomes difficult. When the weight average molecular weight (Mw) is 650 or less, the affinity with the cellulose ester resin is likely to increase. For this reason, when a weight average molecular weight (Mw) is made into the said range, the moldability of a resin composition and the bleed resistance of a resin molding further improve.
The weight average molecular weight (Mw) is a value measured by gel permeation chromatography (GPC). Specifically, the molecular weight measurement by GPC is carried out with a chloroform solvent using a Tosoh Corporation HPLC1100 as a measuring apparatus, using a Tosoh column TSKgel GMHHR-M + TSKgel GMHHR-M (7.8 mm ID 30 cm). . The weight average molecular weight is calculated from the measurement result using a molecular weight calibration curve prepared with a monodisperse polystyrene standard sample.

The viscosity of the polyether ester compound at 25 ° C. is preferably 35 mPa · s to 50 mPa · s, and more preferably 40 mPa · s to 45 mPa · s.
When the viscosity is 35 mPa · s or more, the dispersibility in the cellulose ester resin is easily improved. When the viscosity is 50 mPa · s or less, the anisotropy of the dispersion of the polyetherester compound hardly appears. For this reason, when a viscosity is made into the said range, the moldability of a resin composition and the bleed resistance of a resin molding further improve.
The viscosity is a value measured with an E-type viscometer.

The solubility parameter (SP value) of the polyether ester compound is preferably from 9.5 to 9.9, and more preferably from 9.6 to 9.8.
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 within the above range, the moldability of the resin composition and the bleed resistance of the resin molded body 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. 147 (1974), the SP value is calculated by the following formula.
Formula: SP value = √ (Ev / v) = √ (ΣΔei / ΣΔvi)
(Where Ev: evaporation energy (cal / mol), v: molar volume (cm ³ / mol), Δei: evaporation energy of each atom or atomic group, Δvi: molar volume of each atom or atomic group)
The solubility parameter (SP value) employs (cal / cm ³ ) ^1/2 as a unit, but the unit is omitted in accordance with common practice and expressed in a dimensionless manner.

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

  Hereinafter, although the specific example of a polyetherester compound is shown, it is not necessarily restricted to this.

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

  The maleic anhydride-modified EVA resin is, for example, an ethylene vinyl acetate copolymer resin obtained by graft-modifying maleic anhydride. 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 is preferably a resin having a density of 0.9 to 0.94 and a melting point of 90 ° C. to 100 ° C., a density of 0.91 to 0.93, and a melting point of 92 ° C. A resin having a temperature of 98 ° C. or lower is 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 increase. Moreover, the fall of the fluidity | liquidity of a resin composition is suppressed and it becomes easy to express thermoplasticity. For this reason, when a density and melting | fusing point are made into the said range, the moldability of a resin composition and the bleeding resistance of a resin molding further improve.

The density of the maleic anhydride-modified EVA resin is a value measured by the floatation method of JISK0061 (2001).
The melting point of the maleic anhydride-modified EVA resin is a value measured by a method according to JISK7121 (2012).

  Specific examples of the maleic anhydride-modified EVA resin are shown below, but are not limited thereto.

[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 from 100/25 to 100/5, more preferably from 100/20 to 100/9.
When the mass ratio is 100/25 or more, the polyether ester compound is difficult to bleed (precipitate). When the mass ratio is 100/5 or less, a decrease in fluidity of the resin composition is suppressed, and thermoplasticity is easily developed. For this reason, when the mass ratio is within the above range, the moldability of the resin composition and the bleed resistance of the resin molded body 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 or more and 100/2 or less, more preferably 100/6 or more and 100/2 or less. .
When the mass ratio is 100/8 or more, a decrease in fluidity of the resin composition is suppressed, and thermoplasticity is easily developed. When the mass ratio is 100/2 or less, the polyether ester compound is difficult to bleed (precipitate). For this reason, when the mass ratio is within the above range, the moldability of the resin composition and the bleed resistance of the resin molded body are further improved.

  In addition, 50 mass% or more and 95 mass% or less are desirable, and, as for the mass ratio to the whole resin composition of a cellulose ester resin, 60 mass% or more and 90 mass% or less are more desirable.

[Other ingredients]
The resin composition according to the present embodiment may further include other components than those described above as necessary. Examples of other components include flame retardants, compatibilizers, plasticizers, antioxidants, release agents, light proofing agents, weathering agents, colorants, pigments, modifiers, anti-drip agents, antistatic agents, Hydrolysis inhibitor, filler, reinforcing agent (glass fiber, carbon fiber, talc, clay, mica, glass flake, milled glass, glass bead, crystalline silica, alumina, silicon nitride, alumina nitride, boron nitride, etc.) Is mentioned. The content of these components is preferably 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 a resin other than the above resin. However, other resins may be included in the total resin at a mass ratio of 5% by mass or less.
Examples of the other resins include conventionally known thermoplastic resins, and specifically, polycarbonate resins; polypropylene resins; polyester resins; polyolefin resins; polyester carbonate resins; polyphenylene ether resins; Polyethersulfone resin; Polyarylene resin; Polyetherimide resin; Polyacetal resin; Polyvinyl acetal resin; Polyketone resin; Polyetherketone resin; Polyetheretherketone resin; Polyarylketone 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 A vinyl polymer or copolymer resin obtained by polymerizing or copolymerizing at least one vinyl monomer; a diene-aromatic alkenyl compound copolymer resin; a vinyl cyanide-diene-aromatic alkenyl compound. Copolymer resin; aromatic alkenyl compound-diene-vinyl cyanide-N-phenylmaleimide copolymer resin; vinyl cyanide- (ethylene-diene-propylene (EPDM))-aromatic alkenyl compound copolymer resin; Vinyl resin; chlorinated vinyl chloride resin; and the like. These resins may be used alone or in combination of two or more.

[Method for Producing Resin Composition]
The resin composition according to this embodiment is produced, for example, by melt-kneading a mixture of the above components. In addition, the resin composition according to the present embodiment is produced, for example, by dissolving the above components in a solvent. Examples of the melt-kneading means include known means, and specific examples include a twin screw extruder, a Henschel mixer, a Banbury mixer, a single screw extruder, a multi-screw extruder, and a kneader.

<Resin molding>
The resin molded body according to the present embodiment includes the resin composition according to the present embodiment. That is, the resin molded body according to the present embodiment is configured with the same composition as the resin composition according to the present embodiment.
Specifically, the resin molded body according to the present embodiment is obtained by molding the resin composition according to the present embodiment. As the molding method, for example, injection molding, extrusion molding, blow molding, hot press molding, calendar molding, coating molding, cast molding, dipping molding, vacuum molding, transfer molding, or the like may be applied.

  The molding method of the resin molded body according to the present embodiment is preferably injection molding because it has a high degree of freedom in shape. In particular, injection molding is preferably applied from the viewpoint of obtaining a resin molded article having excellent bleeding resistance by making use of the moldability (thermoplasticity and fluidity) of the resin composition according to the present embodiment. The cylinder temperature of 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 a commercially available apparatus such as NEX150 manufactured by NISSEI RESIN INDUSTRY, NEX70000 manufactured by NISSEI RESIN INDUSTRY, SE50D manufactured by Toshiba Machine.

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

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

<Examples 1-33, Comparative Examples 1-10>
[Kneading]
A material having the composition shown in Tables 1 and 2 is put into a biaxial kneading apparatus (TEX41SS manufactured by TOSHIBA MACHINE), and the cylinder temperature is kneaded in a range of 220 ° C. to 250 ° C. "). In Tables 1 and 2, “part” means “part by mass”.

[injection molding]
The obtained pellets are put into an injection molding machine (manufactured by Nissei Plastic Industry Co., Ltd., PNX40), the cylinder temperature is in the range of 220 ° C. to 250 ° C., and the mold temperature is 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 the resin pellet. The results are shown in Tables 1 and 2.

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

-Bleed resistance-
The D2 test piece was allowed to stand in a constant temperature and humidity chamber (ARL-1100-J manufactured by Espec Corp.) set to a temperature of 60 ° C. and a humidity of 95% RH. After 72 hours, the D2 test piece was taken out from the constant temperature and humidity chamber. And the bleed resistance was evaluated by visual observation of the surface of the D2 test piece. The evaluation criteria are as follows.
5: No occurrence of fogging due to bleed and bleed 4: Occurrence of fogging due to bleed on part of the surface,
3: Generation of fogging due to bleeding on the entire surface,
2: Liquid bleed occurs in part,
1: Full-surface liquid bleeding occurs

  From the above results, it can be seen that both the moldability (MFR) and bleed resistance evaluation results are better in this example than in the comparative example.

The material types in Tables 1 and 2 are as follows.
Compound 1-8: See specific examples of cellulose ester resin described aboveCompound 8-23: See specific examples of polyether ester compound described aboveCompounds 24-25: Specific of maleic anhydride-modified EVA resin described above See Example: 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 resin composition comprising a cellulose ester resin, a polyether ester compound, and a maleic anhydride-modified ethylene vinyl acetate copolymer resin. 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 that 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 represents an alkylene group having 2 to 10 carbon atoms. A ¹ and A ² each independently represent 1 to 6 carbon atoms. 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 polyetherester compound represented by the general formula (2) is a compound representing an n-butylene group as the R ⁵ . The resin composition according to claim 4 or 5, wherein the polyether ester compound represented by the general formula (2) is a compound representing an aryl group or an aralkyl group as at least one of the A ¹ and the A ² . .   The weight average molecular weight (Mw) of the said polyetherester compound is 450 or more and 650 or less, The resin composition of any one of Claims 1-6.   The resin composition according to any one of claims 1 to 7, wherein the polyether ester compound has a viscosity at 25 ° C of from 35 mPa · s to 50 mPa · s.   The resin composition according to any one of claims 1 to 8, wherein a solubility parameter (SP value) of the polyether ester compound is from 9.5 to 9.9.   The mass ratio (cellulose ester resin / polyether ester compound) between the cellulose ester resin and the polyether ester compound is 100/25 or more and 100/5 or less. Resin composition.   The mass ratio (cellulose ester resin / maleic anhydride modified ethylene vinyl acetate copolymer resin) of the cellulose ester resin and the 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.