JP6191514B2 - Resin composition and resin molded body - Google Patents

Description

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

  Conventionally, various resin compositions containing a cellulose derivative have been provided and used for the production of various resin moldings. For example, Patent Document 1 proposes a resin composition containing 50 to 99% by weight of a cellulose ester resin and 50 to 1% by weight of a plasticizer exhibiting a predetermined solubility parameter.

JP 2008-291246 A

  The subject of this invention is providing the resin composition which is excellent in a moldability and does not generate | occur | produce a bleed in a molded object.

The above problem is solved by the following means. That is,
The invention according to claim 1
A resin composition comprising a cellulose derivative represented by the following general formula (1) and an isosorbide derivative represented by the following general formula (2).

In the general formula ^(1), the ^{A 1, A 2, A 3} , A 4, A 5 and ^{A 6} each independently represents a hydrogen atom, or an acyl radical, n is table an arbitrary integer, provided that the molecule A ¹ , A ² , A ³ , A ⁴ , A ⁵ and A ⁶ present therein are not all hydrogen atoms .
In General Formula (2), R ¹ and R ² each independently represent a single bond, an alkylene group, an arylene group, or a divalent group in which an alkylene group and an arylene group are linked.

The invention according to claim 2
The resin composition according to claim 1, wherein in the general formula (1), A ¹ , A ² , A ³ , A ⁴ , A ⁵ and A ⁶ are each independently a hydrogen atom, an acetyl group, or a propionyl group. object.

The invention according to claim 3
The resin composition of Claim 1 or Claim 2 whose mass ratio to the whole resin composition of the said cellulose derivative is 76 mass% or more and 99 mass% or less.

The invention according to claim 4
The resin composition of Claim 1 or Claim 2 whose mass ratio to the whole resin composition of the said isosorbide derivative is 1 to 30 mass%.

The invention according to claim 5
The resin composition of any one of Claims 1-4 whose weight average molecular weights of the said cellulose derivative are 150,000 or more and 200,000 or less.

The invention according to claim 6
Furthermore, the resin composition of any one of Claims 1-5 containing the at least 1 sort (s) of flame retardant chosen from phosphate ester and a sulfonic acid group containing compound.

The invention according to claim 7 provides:
The resin molding containing the cellulose derivative represented by the following general formula (1), and the isosorbide derivative represented by the following general formula (2).

In the general formula ^(1), the ^{A 1, A 2, A 3} , A 4, A 5 and ^{A 6} each independently represents a hydrogen atom, or an acyl radical, n is table an arbitrary integer, provided that the molecule A ¹ , A ² , A ³ , A ⁴ , A ⁵ and A ⁶ present therein are not all hydrogen atoms .
In General Formula (2), R ¹ and R ² each independently represent a single bond, an alkylene group, an arylene group, or a divalent group in which an alkylene group and an arylene group are linked.

The invention according to claim 8 provides:
In the general formula ^(1), the ^{A 1, A 2, A 3} , A 4, A 5 and ^{A 6} are each independently a hydrogen atom, an acetyl group, or propionyl group, the resin molding according to claim 7 body.

The invention according to claim 9 is:
The resin molded body according to claim 7 or 8, wherein a mass ratio of the cellulose derivative to the entire resin molded body is 76% by mass or more and 99% by mass or less.

The invention according to claim 10 is:
The resin molding of Claim 7 or Claim 8 whose mass ratio which occupies for the whole resin molding of the said isosorbide derivative is 1 to 30 mass%.

The invention according to claim 11 is:
The resin molded product according to any one of claims 7 to 10, wherein the cellulose derivative has a weight average molecular weight of 150,000 or more and 200,000 or less.

The invention according to claim 12
Furthermore, the resin molding of any one of Claims 7-11 containing the at least 1 sort (s) of flame retardant chosen from a phosphate ester and a sulfonic acid group containing compound.

According to the invention which concerns on Claim 1, compared with the case where the said isosorbide derivative is not included but another plasticizer is included, the resin composition which is excellent in a moldability and does not generate | occur | produce a bleeding in a molded object is provided.
According to the second aspect of the present invention, there is provided a resin composition that is more excellent in moldability and less likely to cause bleeding in the molded body as compared with the case where A ^{1 to} A ⁶ contain an acyl group other than an acetyl group and a propionyl group. Is done.
According to the invention which concerns on Claim 3, compared with the case where the mass ratio of the said cellulose derivative remove | deviates from the said range, the resin composition which is excellent in a moldability is provided.
According to the invention which concerns on Claim 4, compared with the case where the mass ratio of the said isosorbide derivative remove | deviates from the said range, the resin composition which is excellent in a moldability is provided.
According to the invention which concerns on Claim 5, compared with the case where the weight average molecular weight of the said cellulose derivative remove | deviates from the said range, the resin composition which is excellent in a moldability and it is hard to generate | occur | produce a bleed in a molded object is provided.
According to the invention which concerns on Claim 6, compared with the case where a phosphate ester or a sulfonic-acid-group containing compound is not included as a flame retardant and a different compound is included, the resin composition which is excellent in a flame retardance is provided.

According to the invention which concerns on Claim 7, compared with the case where the said isosorbide derivative is not included but another plasticizer is included, the resin molding which a bleed does not generate | occur | produce easily is provided.
According to the invention of claim 8, compared to the case containing the acyl groups other than acetyl group and propionyl group A ¹ to A ^6, bleeding is more hard to occur the resin molded body is provided.
According to the invention which concerns on Claim 9, compared with the case where the mass ratio of the said cellulose derivative remove | deviates from the said range, the resin molding which it is hard to generate | occur | produce a bleed is provided more reliably.
According to the invention which concerns on Claim 10, compared with the case where the mass ratio of the said isosorbide derivative remove | deviates from the said range, the resin molding which is hard to generate | occur | produce a bleed is provided more reliably.
According to the invention which concerns on Claim 11, compared with the case where the weight average molecular weight of the said cellulose derivative remove | deviates from the said range, the resin molding which it is hard to generate | occur | produce a bleed is provided.
According to the invention which concerns on Claim 12, compared with the case where a phosphate ester or a sulfonic acid group containing compound is not included as a flame retardant and another compound is included, a resin molded article which is superior in flame retardancy is provided.

  Embodiments 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 contains a cellulose derivative represented by the following general formula (1) and an isosorbide derivative represented by the following general formula (2).

In the general formula ^(1), the ^{A 1, A 2, A 3} , A 4, A 5 and ^{A 6} each independently represents a hydrogen atom, or an acyl radical, n is table an arbitrary integer, provided that the molecule A ¹ , A ² , A ³ , A ⁴ , A ⁵ and A ⁶ present therein are not all hydrogen atoms .
In General Formula (2), R ¹ and R ² each independently represent a single bond, an alkylene group, an arylene group, or a divalent group in which an alkylene group and an arylene group are linked.

  The resin composition according to the present embodiment contains a cellulose derivative represented by the general formula (1) as a main component. In the present embodiment, the main component refers to a component having the largest content ratio (mass basis) among the components contained in the resin composition.

  The resin composition containing the cellulose derivative represented by the general formula (1) as a main component and the isosorbide derivative represented by the general formula (2) is excellent in moldability and hardly causes bleeding in the molded body. The presumed mechanism is explained below.

  Cellulose derivatives have extremely low fluidity even if they are at a decomposition temperature of 230 ° C. to 250 ° C. due to the influence of hydrogen bonds between the molecules when there are hydroxyl groups in the molecule. For this reason, the resin composition containing a cellulose derivative as a main component has poor adaptability to molding methods that require fluidity such as injection molding, and it has been difficult to form the shape of the molded product freely. Conventionally, as a technique for improving the fluidity of a cellulose derivative, there is a technique of adding a plasticizer typified by a phthalate ester or a phosphate ester. A phenomenon in which the additive exudes to the surface of the molded body, so-called bleed is likely to occur.

On the other hand, this inventor discovered that the fluidity | liquidity of a resin composition improved remarkably by adding the isosorbide derivative represented by General formula (2) to the resin composition containing a cellulose derivative. Since the isosorbide derivative has a hydroxyl group at the terminal of the substituent bonded to the alicyclic structure, it has a high affinity for the cellulose derivative due to the interaction with the hydroxyl group in the molecule of the cellulose derivative. . Therefore, it is considered that the isosorbide derivative disturbs the intermolecular interaction between the cellulose derivatives, and as a result, improves the fluidity of the resin composition.
In addition, even if this isosorbide derivative is added to a resin composition containing a cellulose derivative, bleeding is unlikely to occur. This effect is considered due to the fact that the isosorbide derivative is bonded to the cellulose derivative by hydrogen bonding.

  In addition to being excellent in fluidity, the resin composition according to this embodiment has good leveling properties when dissolved in a solvent. It is considered that the fluidity of the resin composition is improved because the intermolecular interaction between cellulose derivatives is disturbed by the isosorbide derivative represented by the general formula (2).

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

[Cellulose derivative]
The resin composition according to the present embodiment contains a cellulose derivative represented by the general formula (1) (also simply referred to as “cellulose derivative”).

In the general formula (1), A ^{1 to} A ⁶ each independently represent a hydrogen atom or an acyl group. A ¹ and n times in the cellulose derivative molecule may be different from each other in the same part in all the same. n A ² , n A ³ , n A ⁴ , n A ⁵ , and n A ⁶ may be all the same, partially the same, or different from each other. However, A ¹ , A ² , A ³ , A ⁴ , A ⁵ and A ⁶ present in the molecule are not all hydrogen atoms.

Cellulose derivatives represented by the general formula (1) is a cellulose derivative in which at least a portion of the hydroxyl groups of cellulose have been acylated. The degree of acylation of the cellulose derivative in the present embodiment is represented by an intramolecular average (hereinafter referred to as “degree of substitution”) of the number of substitutions of three hydroxyl groups in the D-glucopyranose unit. In the present embodiment, the degree of substitution is desirably 2.0 or more and 2.9 or less. When the degree of substitution is 2.0 or more, the intermolecular interaction between cellulose derivatives is relaxed, and the fluidity of the resin composition is further increased. On the other hand, when the substitution degree is 2.9 or less, the affinity between the cellulose derivative and the isosorbide derivative represented by the general formula (2) is good, and the occurrence of bleeding is further suppressed. The degree of substitution is more preferably 2.2 or more and 2.5 or less from the above viewpoint.

Examples of the acyl group represented by A ^{1 to} A ⁶ in the general formula (1) include a formyl group, an acetyl group, a propionyl group, and a benzoyl group. As the acyl group, an acetyl group or a propionyl group is desirable because the fluidity of the resin composition is higher and generation of bleeding is further suppressed.

  In the general formula (1), n represents an arbitrary integer. The range of n is not particularly limited, but is, for example, 200 or more and 750 or less, and preferably 350 or more and 500 or less.

  The weight average molecular weight of the cellulose derivative is preferably 100,000 or more and 300,000 or less. When the weight average molecular weight is 100,000 or more, bleed generation is further suppressed. On the other hand, when the weight average molecular weight is 300,000 or less, the fluidity of the resin composition is higher. The weight average molecular weight of the cellulose derivative is more preferably 150,000 or more and 200,000 or less from the above viewpoint.

  50 mass% or more and 99 mass% or less are good, and, as for the mass ratio to the whole resin composition of a cellulose derivative, 76 mass% or more and 99 mass% or less are desirable. When the mass ratio of the cellulose derivative is 76% by mass or more, the fluidity becomes appropriate, and a molded product can be obtained more reliably. On the other hand, from the viewpoint of securing the content of the isosorbide derivative represented by the general formula (2) to increase the fluidity of the resin composition and reliably obtaining a molded product, the mass ratio of the cellulose derivative is desirably 99% by mass or less. . From the above viewpoint, the mass ratio of the cellulose derivative is more preferably 80% by mass to 95% by mass, and still more preferably 85% by mass to 90% by mass.

[Isosorbide derivatives]
The resin composition according to the present embodiment contains an isosorbide derivative represented by the general formula (2) (also simply referred to as “isosorbide derivative”).

In the general formula (2), the alkylene group represented by R ¹ and R ² is preferably an alkylene group having 1 to 6 carbon atoms, more preferably an alkylene group having 1 to 4 carbon atoms, and 2 carbon atoms. Or an alkylene group of 3 is more desirable. The alkylene group may be linear, branched, or cyclic. Specifically, for example, a linear alkylene group such as a methylene group, ethylene group, trimethylene group, tetramethylene group, pentamethylene group, hexamethylene group; propylene group, iso-butylene group, tert-butylene group, iso A branched alkylene group such as a pentylene group, a tert-pentylene group, an iso-hexylene group or a tert-hexylene group; a cyclic alkylene group such as a cyclopropylene group, a cyclobutylene group, a cyclopentylene group or a cyclohexylene group; Is mentioned.

In the general formula (2), the arylene group represented by R ¹ and R ² is preferably an arylene group having 6 to 12 carbon atoms. Specific examples include a phenylene group, a naphthylene group, a biphenylene group, and the like, and a phenylene group is desirable. The arylene group may be substituted with an alkyl group, for example, an alkyl group having 1 to 4 carbon atoms (for example, a methyl group, an ethyl group, an n-propyl group, an isopropyl group, a cyclopropyl group, an n-butyl group). , Isobutyl group, tert-butyl group, cyclobutyl group, etc.).

In the general formula (2), the divalent group represented by R ¹ and R ² in which an alkylene group and an arylene group are linked is a group in which at least one alkylene group and at least one arylene group are linked. Either the alkylene group or the arylene group may be on the alicyclic structure side, and the alkylene group and the arylene group may be alternately connected.
The alkylene group is preferably an alkylene group having 1 to 6 carbon atoms, more preferably an alkylene group having 1 to 4 carbon atoms, and further preferably an alkylene group having 1 or 2 carbon atoms. As the arylene group, an arylene group having 6 to 12 carbon atoms is desirable, and a phenylene group is more desirable. The arylene group may be substituted with an alkyl group, for example, may be substituted with an alkyl group having 1 to 4 carbon atoms.

  Specifically, the divalent group is an alkylene group having 1 to 4 carbon atoms (for example, methylene group, ethylene group, trimethylene group, tetramethylene group, propylene group, iso-butylene group, tert-butylene group, (A cyclopropylene group, a cyclobutylene group, etc.) and a group in which a phenylene group is linked are desirable, and a group in which an alkylene group having 1 or 2 carbon atoms and a phenylene group are linked is more desirable. In this case, either the alkylene group or the phenylene group may be on the alicyclic structure side, and the alkylene group and the phenylene group may be alternately connected.

  Although the specific example of an isosorbide derivative is given to the following, this invention is not restrict | limited to this.

  As for the mass ratio to the whole resin composition of an isosorbide derivative, 1 to 30 mass% is desirable. When the mass proportion of the isosorbide derivative is 1% by mass or more, the fluidity of the resin composition becomes appropriate, and a molded product can be obtained reliably. On the other hand, when the mass proportion of the isosorbide derivative is 30% by mass or less, generation of bleed is suppressed and fluidity becomes moderate, and a molded body can be obtained with certainty. From the above viewpoint, the mass ratio of the isosorbide derivative is more preferably 1% by mass or more and 25% by mass or less, further preferably 1% by mass or more and 20% by mass or less, and further preferably 5% by mass or more and 20% by mass or less. It is as follows.

[Flame retardants]
The resin composition according to this embodiment may further contain a flame retardant. The flame retardant is not particularly limited, and a conventionally known one may be used. For example, a phosphorus flame retardant, a sulfuric acid flame retardant, a nitrogen flame retardant, an inorganic hydroxide flame retardant, a halogen flame retardant, a silicone flame retardant Examples include flame retardants. In the present embodiment, phosphate esters (including condensed phosphate esters) and sulfonic acid group-containing compounds are desirable. Although the mechanism is not clear, when combined with a cellulose derivative and an isosorbide derivative, the phosphoric acid ester and the sulfonic acid group-containing compound are higher in flame retardancy than other flame retardants.

  Examples of phosphate esters include trimethyl phosphate, triethyl phosphate, tributyl phosphate, tri (2-ethylhexyl) phosphate, tributoxyethyl phosphate, triphenyl phosphate, tricresyl phosphate, trixylenyl phosphate, tris (isopropylphenyl) phosphate. , Tris (phenylphenyl) phosphate, trinaphthyl phosphate, cresyl diphenyl phosphate, xylenyl diphenyl phosphate, diphenyl (2-ethylhexyl) phosphate, di (isopropylphenyl) phenyl phosphate, monoisodecyl phosphate, 2-acryloyloxyethyl acid Phosphate, 2-methacryloyloxyethyl acid phosphate, diphenyl Examples include 2-acryloyloxyethyl phosphate, diphenyl-2-methacryloyloxyethyl phosphate, melamine phosphate, dimelamine phosphate, melamine pyrophosphate, triphenylphosphine oxide, tricresylphosphine oxide, diphenyl methanephosphonate, and diethyl phenylphosphonate. It is done.

  Examples of the condensed phosphate ester include aromatic condensed phosphate esters such as bisphenol A type, biphenylene type, and isophthal type. Specifically, for example, a condensed phosphate ester represented by the following general formula (A) and a condensed phosphate ester represented by the following general formula (B) can be mentioned.

In general formula (A), Q ¹ , Q ² , Q ³ and Q ⁴ each independently represent an alkyl group having 1 to 6 carbon atoms, Q ⁵ and Q ⁶ each independently represent a methyl group, Q ⁷ and Q ⁸ each independently represent a hydrogen atom or a methyl group, m1, m2, m3 and m4 each independently represent an integer of 0 or more and 3 or less, and m5 and m6 each independently represent 0 or more and 2 The following integer is represented, n1 represents the integer of 0-10.

In the general formula (B), Q ⁹ , Q ¹⁰ , Q ¹¹ and Q ¹² each independently represents an alkyl group having 1 to 6 carbon atoms, Q ¹³ represents a methyl group, m7, m8, m9 and m10. Each independently represents an integer of 0 or more and 3 or less, m11 represents an integer of 0 or more and 4 or less, and n2 represents an integer of 0 or more and 10 or less.

  The condensed phosphate ester may be a synthetic product or a commercial product. As commercially available products of condensed phosphate esters, for example, “PX200”, “PX201”, “PX202”, “CR741”, etc., which are commercially available products from Daihachi Chemical Industry Co., Ltd., “Adekastab FP2100” And “ADK STAB FP2200”.

  Examples of the sulfonic acid group-containing compound include a polymer into which a sulfonic acid group or a sulfonic acid group is introduced, a salt of sulfuric acid and a basic compound, polymer particles having sulfuric acid or a sulfate on the surface, and the like. Examples thereof include potassium polystyrene sulfonate, sodium polystyrene sulfonate, AS (acrylonitrile styrene) resin potassium sulfonate, AS resin sodium sulfonate, melamine sulfate, guanidine sulfate, sulfuric acid, or potassium sulfate-coated polystyrene particles.

  The mass ratio of the flame retardant to the entire resin composition is preferably 1% by mass or more and 30% by mass or less, more preferably 5% by mass or more and 25% by mass or less, from the viewpoint of improving flame retardancy and suppressing bleeding. % To 20% by mass is more desirable.

[Other ingredients]
The resin composition according to the present embodiment may further include other components than those described above as necessary. Other components include, for example, compatibilizers, plasticizers, antioxidants, mold release agents, light proofing agents, weathering agents, colorants, pigments, modifiers, anti-drip agents, antistatic agents, and hydrolysis resistance. Agents, fillers, reinforcing agents (glass fiber, carbon fiber, talc, clay, mica, glass flake, milled glass, glass beads, crystalline silica, alumina, silicon nitride, alumina nitride, boron nitride, etc.) . 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 cellulose derivative represented by the general formula (1). However, other resins are blended in such a range that the moldability by the molding machine is not reduced.
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; polyolefin Vinyl chloride 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 molding which concerns on this embodiment consists of the resin composition which concerns on this 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. The resin composition according to the present embodiment has high fluidity and can be applied by injection molding. 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.

<Production of resin composition and resin molded body>
[Premix]
200 g of the material having the composition shown in Table 1 was charged into a mixing apparatus (SMV-10B manufactured by Kawata) and mixed at 180 ° C. and 1000 rpm for 30 minutes to obtain compositions 1 to 26 and C1 to C13. The numerical values in Table 1 are parts by mass.

The material types in Table 1 are as follows.
-Cellulose derivative-
Compound 1: Cellulose acetate, degree of acetyl substitution 2.42, weight average molecular weight 120,000 (L-20 manufactured by Daicel)
Compound 2: cellulose acetate, degree of acetyl substitution 2.56, weight average molecular weight 180,000 (L-50 manufactured by Daicel)
Compound 3: cellulose acetate, degree of acetyl substitution 2.68, weight average molecular weight 220,000 (D-Cel L-70)
Compound 4: cellulose acetate, acetyl substitution degree 2.79, weight average molecular weight 260,000 (LT-105 manufactured by Daicel)
Compound 5: cellulose acetate propionate, acetyl substitution degree 1.95 / propionyl substitution degree 0.42, weight average molecular weight 140,000 (CA-320S manufactured by Eastman Chemical Co.)
Compound 6: cellulose acetate propionate, acetyl substitution degree 1.88 / propionyl substitution degree 0.52, weight average molecular weight 180,000 (CA-394-60S manufactured by Eastman Chemical Co.)
Compound 7: cellulose acetate propionate, acetyl substitution degree 1.74 / propionyl substitution degree 0.58, weight average molecular weight 220,000 (CA-398-6 manufactured by Eastman Chemical Co.)

-Plasticizer-
Compound 8: Phthalate ester (Wako Pure Chemical Industries, Ltd.)
Compound 9: Adipic acid ester (Wako Pure Chemical Industries, Ltd.)
Compound 10: Triphenyl phosphate (manufactured by Daihachi Chemical Industry Co., Ltd.)

-Isosorbide derivatives-
Compound 11: Compound I-1 described above
Compound 12: Compound I-2 described above
Compound 13: Compound I-3 described above
Compound 14: Compound I-4 described above
Compound 15: Compound I-5 described above

-Flame retardant-
Compound 16: condensed phosphate ester (PX200 manufactured by Daihachi Chemical Industry Co., Ltd.)
Compound 17: condensed phosphate ester (CR741 manufactured by Daihachi Chemical Industry Co., Ltd.)
Compound 18: Compound containing sulfonic acid group (PASS-K manufactured by Sony Chemical Corporation)
Compound 19: Aluminum hydroxide (Showa Denko Heidilite S-48TV)
Compound 20: Melamine cyanurate (MC-4000 manufactured by Nissan Chemical Industries)

[Kneading]
Compositions 1 to 26 and C8 to C13 were charged into a biaxial kneader (TEX41SS manufactured by TOSHIBA MACHINE) and kneaded at the cylinder temperature shown in Table 2 to obtain a kneaded product. Compositions C8, C10, and C12 had kneading torque exceeding the upper limit of the apparatus, and kneading was impossible.

[Molding]
Each kneaded product of compositions 1-26, C9, C11, C13 and compositions C1-C7 (each cellulose derivative) were charged into an injection molding machine (NEX150 manufactured by Nissei Plastic Industry Co., Ltd.), respectively. D2 test pieces (length 60 mm, width 60 mm, thickness 2 mm) and UL test pieces (length 125 mm, width 13 mm, thickness 0.5 mm / 1.6 mm) were produced at the mold temperature. In the compositions C1 to C4, the plasticizing torque exceeded the upper limit of the apparatus, and it was impossible to mold the test piece.

<Evaluation>
[MFR measurement]
About each premixed composition, melt mass flow rate (MFR, g / 10min) was measured on condition of 220 degreeC / 10kg using the melt indexer (G-01 by Toyo Seiki Co., Ltd.), and fluidity | liquidity was evaluated. The results are shown in Table 3. The MFR is preferably 2.5 or more in terms of moldability. Compositions C8, C10, and C12 did not fluidize under the above conditions, and MFR could not be measured.

[Bleed resistance]
The D2 test piece was placed in a thermostatic bath at a temperature of 65 ° C./humidity 85% and left for 500 hours, and the presence or absence of bleed on the surface of the test piece was confirmed with the naked eye. The results are shown in Table 3.

[Flame retardance]
Flame retardancy was evaluated according to the UL94 standard V test using a UL test piece. Judgment criteria are V-0, V-1, V-2, and Not in the order of excellent flame retardancy. The results are shown in Table 3.

Claims (12)

A resin composition comprising a cellulose derivative represented by the following general formula (1) and an isosorbide derivative represented by the following general formula (2).

In the general formula ^(1), the ^{A 1, A 2, A 3} , A 4, A 5 and ^{A 6} each independently represents a hydrogen atom, or an acyl radical, n is table an arbitrary integer, provided that the molecule A ¹ , A ² , A ³ , A ⁴ , A ⁵ and A ⁶ present therein are not all hydrogen atoms .
In General Formula (2), R ¹ and R ² each independently represent a single bond, an alkylene group, an arylene group, or a divalent group in which an alkylene group and an arylene group are linked. The resin composition according to claim 1, wherein in the general formula (1), A ¹ , A ² , A ³ , A ⁴ , A ⁵ and A ⁶ are each independently a hydrogen atom, an acetyl group, or a propionyl group. object.   The resin composition of Claim 1 or Claim 2 whose mass ratio to the whole resin composition of the said cellulose derivative is 76 mass% or more and 99 mass% or less. The resin composition of Claim 1 or Claim 2 whose mass ratio to the whole resin composition of the said isosorbide derivative is 1 to 30 mass%.   The resin composition of any one of Claims 1-4 whose weight average molecular weights of the said cellulose derivative are 150,000 or more and 200,000 or less.   Furthermore, the resin composition of any one of Claims 1-5 containing the at least 1 sort (s) of flame retardant chosen from phosphate ester and a sulfonic acid group containing compound. The resin molding containing the cellulose derivative represented by the following general formula (1), and the isosorbide derivative represented by the following general formula (2).

In the general formula ^(1), the ^{A 1, A 2, A 3} , A 4, A 5 and ^{A 6} each independently represents a hydrogen atom, or an acyl radical, n is table an arbitrary integer, provided that the molecule A ¹ , A ² , A ³ , A ⁴ , A ⁵ and A ⁶ present therein are not all hydrogen atoms .
In General Formula (2), R ¹ and R ² each independently represent a single bond, an alkylene group, an arylene group, or a divalent group in which an alkylene group and an arylene group are linked. In the general formula ^(1), the ^{A 1, A 2, A 3} , A 4, A 5 and ^{A 6} are each independently a hydrogen atom, an acetyl group, or propionyl group, the resin molding according to claim 7 body.   The resin molded body according to claim 7 or 8, wherein a mass ratio of the cellulose derivative to the entire resin molded body is 76% by mass or more and 99% by mass or less. The resin molding of Claim 7 or Claim 8 whose mass ratio which occupies for the whole resin molding of the said isosorbide derivative is 1 to 30 mass%.   The resin molded product according to any one of claims 7 to 10, wherein the cellulose derivative has a weight average molecular weight of 150,000 or more and 200,000 or less.   Furthermore, the resin molding of any one of Claims 7-11 containing the at least 1 sort (s) of flame retardant chosen from a phosphate ester and a sulfonic acid group containing compound.