JP5639862B2 - MOLDING MATERIAL, MOLDED BODY, MANUFACTURING METHOD THEREOF, AND CASE FOR ELECTRIC AND ELECTRONIC DEVICE - Google Patents

Description

  The present invention relates to a molding material, a molded body, a manufacturing method thereof, and a casing for electric and electronic equipment.

Various materials are used for members constituting electric and electronic devices such as copiers and printers in consideration of characteristics and functions required for the members. For example, PC (Polycarbonate), ABS (Acrylonitrile-butadiene-styrene) resin, PC / ABS, etc. are generally used as a member (housing) that stores a drive machine for electrical and electronic equipment and protects the drive machine. In large amounts (Patent Document 1). These resins are produced by reacting compounds obtained from petroleum as a raw material.
By the way, fossil resources such as oil, coal, and natural gas are mainly composed of carbon that has been fixed in the ground for many years. When such fossil resources or products made from fossil resources are burned and carbon dioxide is released into the atmosphere, carbon that was originally not deep in the atmosphere but fixed deep in the ground Is rapidly released as carbon dioxide, and carbon dioxide in the atmosphere greatly increases, which causes global warming. Therefore, polymers such as ABS and PC made from petroleum, which is a fossil resource, have excellent characteristics as materials for electrical and electronic equipment, but are made from petroleum, which is a fossil resource. Therefore, it is desirable to reduce the amount used from the viewpoint of preventing global warming.
On the other hand, a plant-derived resin is originally produced by a photosynthesis reaction using carbon dioxide and water in the atmosphere as raw materials. Therefore, even if plant-derived resin is incinerated to generate carbon dioxide, the carbon dioxide is equivalent to carbon dioxide originally in the atmosphere, so the balance of carbon dioxide in the atmosphere is plus or minus zero After all, there is an idea that the total amount of CO _{2 in} the atmosphere is not increased. Based on this idea, plant-derived resins are referred to as so-called “carbon neutral” materials. The use of carbon-neutral materials in place of petroleum-derived resins is an urgent need to prevent global warming in recent years.
For this reason, in PC polymer, the method of reducing petroleum origin resources is proposed by using plant origin resources, such as starch, as some raw materials derived from petroleum (patent documents 2).
However, further improvements are required from the perspective of aiming for a more complete carbon neutral material.

  As known cellulose derivatives, hydroxypropylmethylacetylcellulose is described in Patent Document 3 and Patent Document 4. Patent Document 3 and Patent Document 4 describe that this hydroxypropylmethylacetylcellulose is useful as an additive for reducing the vapor pressure of an organic solvent that easily volatilizes. In addition, the substitution degree of each substituent in hydroxypropylmethylacetylcellulose described in Patent Document 3 and Patent Document 4 is, for example, a molar substitution degree (MS) of hydroxypropyl group in a range of about 2 to 8, a substitution degree of methyl group Is in the range of about 0.1 to 1 and the degree of substitution of the acetyl group is in the range of about 0.8 to 2.5.

On the other hand, Patent Documents 5 and 6 disclose that polyethylene glycol or polyethylene oxide is added to a thermoplastic resin to improve the falling weight impact strength of the resin composition.
Patent Documents 7 and 8 describe compositions containing a cellulose ester and a polyether.

JP-A-56-55425 JP 2008-24919 A US Pat. No. 3,979,179 U.S. Pat. No. 3,940,384 JP-A-6-57093 JP-A-9-202859 JP 2004-182979 A JP 59-86639 A

The inventors of the present invention focused on using cellulose as a carbon neutral resin. However, since cellulose generally does not have thermoplasticity, it is difficult to mold by heating or the like, and thus is not suitable for molding. Further, even if thermoplasticity can be imparted, there is a problem that strength such as impact resistance is greatly reduced.
For example, the cellulose derivatives described in Patent Documents 3 and 4 are not preferable as a molding material because they are water-soluble or swellable and lack strength. Moreover, the molded object obtained from the composition containing a cellulose ester and a polyether like patent document 7 and 8 is inferior to falling ball impact strength.
Like these, conventionally, various improvements have been made by adding arbitrary amounts of plasticizers and lubricants to known cellulosic resins. However, when used as large-sized molded articles such as exteriors of electrical and electronic equipment casings. However, the ball drop impact strength, which is a particularly important characteristic, could not be improved, and the use in this field had to be abandoned.

  The object of the present invention is that it has good thermoplasticity and is excellent in terms of moldability (melt volume rate), heat resistance (deflection temperature under load), rigidity (flexural modulus), and impact resistance (falling ball impact strength). It is to provide a molding material. Another object of the present invention is to provide a molded body obtained by molding the molding material, a method for producing the molded body, and a housing for electric and electronic equipment composed of the molded body.

（式中、Ｒ _Ｃ１ は炭化水素基を表し、Ｒ _Ｃ２ は炭素数が２〜４のアルキレン基を表す。ｎは１以上の整数を表す。）
＜５＞
前記アルキレンオキシ基のモル置換度ＭＳが、０＜ＭＳ≦１．５である、＜３＞又は＜４＞に記載の成形材料。
＜６＞
前記Ａ）炭素数１〜４のアルキル基：−Ｒ _Ａ の置換度ＤＳ _Ａ が、１．０＜ＤＳ _Ａ ≦２．５である、＜１＞〜＜５＞のいずれかに記載の成形材料。
＜７＞
前記Ｒ _Ａ がメチル基又はエチル基である、＜１＞〜＜６＞のいずれかに記載の成形材料。
＜８＞
前記Ｒ _Ｃ１ が、アルキル基又はアリール基である、請求項＜３＞〜＜５＞のいずれかに記載の成形材料。
＜９＞
前記Ｒ _Ｂ 及びＲ _Ｃ１ が、それぞれ独立に、メチル基、エチル基、又はプロピル基である、＜３＞〜＜８＞のいずれかに記載の成形材料。
＜１０＞
前記Ｒ _Ｂ が、炭素数３〜１０の分岐構造を有するアルキル基である、＜１＞〜＜８＞のいずれかに記載の成形材料。
＜１１＞
前記アルキレンオキシ基が下記式（１）又は（２）で表される基である、＜３＞〜＜５＞及び＜８＞のいずれかに記載の成形材料。

＜１２＞
前記セルロース誘導体が、カルボキシル基、スルホン酸基、及びこれらの塩を実質的に有さない、＜１＞〜＜１１＞のいずれかに記載の成形材料。
＜１３＞
前記セルロース誘導体が水に不溶である、＜１＞〜＜１２＞のいずれかに記載の成形材料。
＜１４＞
前記ポリエーテル化合物が、ポリエチレングリコール、及びエチレングリコール／プロピレングリコール共重合体から選択される少なくとも一つである、＜１＞〜＜１３＞のいずれかに記載の成形材料。
＜１５＞
＜１＞〜＜１４＞のいずれかに記載の成形材料を成形して得られる成形体。
＜１６＞
＜１＞〜＜１４＞のいずれかに記載の成形材料を加熱し、成形する工程を含む、成形体の製造方法。
＜１７＞
＜１５＞に記載の成形体から構成される電気電子機器用筐体。
本発明は上記＜１＞〜＜１７＞に記載した事項に関するものであるが参考のためにその他の事項（たとえば下記［１］〜［１７］に記載した事項など）についても記載した。 The present inventors paid attention to the molecular structure of cellulose, made cellulose a cellulose derivative having a specific structure having an ether structure and an ester structure, and made a thermoplastic resin by using a molding material containing the cellulose derivative having the specific structure and a polyether compound. It exhibits excellent performance in all aspects of moldability, heat resistance, rigidity, and impact resistance, and in particular, it can exhibit falling ball impact strength that could not be achieved with conventional cellulosic resins and compositions using the same. The headline and the present invention were completed.
That is, the said subject can be achieved by the following means.
<1>
The hydrogen atom of the hydroxyl group contained in cellulose
At least one group substituted in A) below, and
A cellulose derivative comprising at least one group substituted in B) below;
It contains at least one of the repeating unit represented by the following general formula (p1) and the repeating unit represented by the following general formula (p2), and at least one terminal group has the following general formula (p1-1), (p1 -2), a molding material containing a polyether compound which is a group represented by (p2-1) or (p2-2),
The compounding amount of the polyether compound in the molding material is 1 to 50% by mass,
A molding material in which the polyether compound has a mass average molecular weight of 10,000 to 10,000,000.
A) an alkyl group having 1 to 4 carbon atoms: -R _A
B) Acyl group: —CO—R _B (R _B represents an alkyl group having 1 to 12 carbon atoms or an aryl group.)
_{-CH 2 CH (R p) O-} ··· (p1)
_{- (CH 2) p O- ···} (p2)
[In the general formulas (p1) and (p2), R _p represents an alkyl group having 1 to 6 carbon atoms, an alkoxyl group having 1 to 6 carbon atoms, or a halogen atom. The alkyl group may have a halogen atom or an allyloxy group as a substituent. p represents an integer of 2 to 5. ]
—CH ₂ CH (R _p ) O—R _m1 (p1-1)
R _m2 —CH ₂ CH (R _p ) O— (p1-2)
_{- (CH 2) p O-} R m1 ··· (p2-1)
_{R m2 - (CH 2) p} O- ··· (p2-2)
[In the general formulas (p1-1), (p1-2), (p2-1), and (p2-2), R _p represents an alkyl group having 1 to 6 carbon atoms, an alkoxyl group having 1 to 6 carbon atoms, or Represents a halogen atom. The alkyl group may have a halogen atom or an allyloxy group as a substituent. p represents an integer of 2 to 5. R _m1 represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms. R _m2 represents a hydrogen atom, an alkoxyl group having 1 to 20 carbon atoms, a hydroxyl group, or an acyloxy group having 2 to 20 carbon atoms. ]
<2>
The polyether compound has a repeating unit represented by the general formula (p2), one terminal group is represented by the general formula (p2-1), R _m1 is a hydrogen atom, and the other terminal group is represented by the general formula _{(p2-2), R m2} is a hydroxyl group, the molding material according to <1>.
<3>
The molding material according to <1> or <2>, wherein the cellulose derivative further contains at least one group in which a hydrogen atom of a hydroxyl group contained in cellulose is substituted by the following C).
C) a group containing an alkyleneoxy group: —R _C2 —O— and an acyl group: —CO—R _C1 (R _C1 represents a hydrocarbon group, and R _C2 represents an alkylene group having 2 to 4 carbon atoms. )
<4>
The molding material according to <3>, wherein the group C) containing an alkyleneoxy group and an acyl group is a group represented by the following general formula (3).

(Wherein R _C1 represents a hydrocarbon group, R _C2 represents an alkylene group having 2 to 4 carbon atoms, and n represents an integer of 1 or more.)
<5>
The molding material according to <3> or <4>, wherein the degree of molar substitution MS of the alkyleneoxy group is 0 <MS ≦ 1.5.
<6>
The molding material according to any one of <1> to <5>, wherein the A) alkyl group having 1 to 4 carbon atoms: -R _{A has} a substitution degree DS _A of 1.0 <DS _A ≦ 2.5. .
<7>
The molding material according to any one of <1> to <6>, wherein R _A is a methyl group or an ethyl group.
<8>
The molding material according to any one of claims <3> to <5>, wherein R _C1 is an alkyl group or an aryl group.
<9>
The molding material according to any one of <3> to <8>, wherein R _B and R _C1 are each independently a methyl group, an ethyl group, or a propyl group.
<10>
Wherein _{R B} is an alkyl group having a branched structure having 3 to 10 carbon atoms, molding material according to any one of <1> to <8>.
<11>
The molding material in any one of <3>-<5> and <8> whose said alkyleneoxy group is group represented by following formula (1) or (2).

<12>
The molding material in any one of <1>-<11> in which the said cellulose derivative does not have a carboxyl group, a sulfonic acid group, and these salts substantially.
<13>
The molding material according to any one of <1> to <12>, wherein the cellulose derivative is insoluble in water.
<14>
The molding material according to any one of <1> to <13>, wherein the polyether compound is at least one selected from polyethylene glycol and an ethylene glycol / propylene glycol copolymer.
<15>
<1>-<14> The molded object obtained by shape | molding the molding material in any one of.
<16>
<1>-<14> The manufacturing method of a molded object including the process of heating and shape | molding the molding material in any one of.
<17>
<15> The housing | casing for electrical and electronic equipment comprised from the molded object as described in <15>.
The present invention relates to the items described in the above <1> to <17>, but other items (for example, items described in the following [1] to [17]) are also described for reference.

[1]
The hydrogen atom of the hydroxyl group contained in cellulose
A cellulose derivative comprising at least one group substituted in A) below and at least one group substituted in B) below;
It contains at least one of the repeating unit represented by the following general formula (p1) and the repeating unit represented by the following general formula (p2), and at least one terminal group has the following general formula (p1-1), (p1 -2), a molding material containing a polyether compound which is a group represented by (p2-1) or (p2-2).
A) Hydrocarbon group: -R _A
B) Acyl group: —CO—R _B (R _B represents a hydrocarbon group.)
_{-CH 2 CH (R p) O-} ··· (p1)
_{- (CH 2) p O- ···} (p2)
[In the general formulas (p1) and (p2), R _p represents an alkyl group having 1 to 6 carbon atoms, an alkoxyl group having 1 to 6 carbon atoms, or a halogen atom. The alkyl group may have a halogen atom or an allyloxy group as a substituent. p represents an integer of 2 to 5. ]
—CH ₂ CH (R _p ) O—R _m1 (p1-1)
R _m2 —CH ₂ CH (R _p ) O— (p1-2)
_{- (CH 2) p O-} R m1 ··· (p2-1)
_{R m2 - (CH 2) p} O- ··· (p2-2)
[In the general formulas (p1-1), (p1-2), (p2-1), and (p2-2), R _p represents an alkyl group having 1 to 6 carbon atoms, an alkoxyl group having 1 to 6 carbon atoms, or Represents a halogen atom. The alkyl group may have a halogen atom or an allyloxy group as a substituent. p represents an integer of 2 to 5. R _m1 represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms. R _m2 represents a hydrogen atom, an alkoxyl group having 1 to 20 carbon atoms, a hydroxyl group, or an acyloxy group having 2 to 20 carbon atoms. ]
[2]
The polyether compound has a repeating unit represented by the general formula (p2), one terminal group is represented by the general formula (p2-1), R _m1 is a hydrogen atom, and the other The molding material according to the above [1], wherein the terminal group is represented by the general formula (p2-2), and R _m2 is a hydroxyl group.
[3]
The molding material according to the above [1] or [2], wherein the cellulose derivative further contains at least one group in which a hydrogen atom of a hydroxyl group contained in cellulose is substituted by the following C).
C) a group containing an alkyleneoxy group: —R _C2 —O— and an acyl group: —CO—R _C1 (R _C1 represents a hydrocarbon group, and R _C2 represents an alkylene group having 2 to 4 carbon atoms. )
[4]
The molding material according to the above [3], wherein the C) group containing an alkyleneoxy group and an acyl group is a group represented by the following general formula (3).

(Wherein R _C1 represents a hydrocarbon group, R _C2 represents an alkylene group having 2 to 4 carbon atoms, and n represents an integer of 1 or more.)
[5]
The molding material according to any one of [1] to [4], wherein R _A is an alkyl group having 1 to 4 carbon atoms.
[6]
The molding material according to any one of [1] to [5], wherein R _A is a methyl group or an ethyl group.
[7]
The molding material according to any one of [3] to [6], wherein R _B and R _C1 are each independently an alkyl group or an aryl group.
[8]
The molding material according to any one of [3] to [7], wherein R _B and R _C1 are each independently a methyl group, an ethyl group, or a propyl group.
[9]
Wherein R _B is a hydrocarbon group having a branched structure having 3 to 10 carbon atoms, molding material according to any one of the above [1] to [7].
[10]
The molding material according to any one of [3] to [9], wherein the alkyleneoxy group is a group represented by the following formula (1) or (2).

[11]
The molding material according to any one of [1] to [10], wherein the cellulose derivative does not substantially contain a carboxyl group, a sulfonic acid group, and a salt thereof.
[12]
The molding material according to any one of [1] to [11], wherein the cellulose derivative is insoluble in water.
[13]
The molding material according to any one of [1] to [12], wherein the polyether compound is at least one selected from polyethylene glycol and an ethylene glycol / propylene glycol copolymer.
[14]
The molding material according to any one of [1] to [13], wherein the polyether compound has a mass average molecular weight of 10,000 to 10,000,000.
[15]
The molded object obtained by shape | molding the molding material of any one of said [1]-[14].
[16]
The manufacturing method of a molded object including the process of heating and shape | molding the molding material of any one of said [1]-[14].
[17]
A housing for electrical and electronic equipment comprising the molded article according to [15] above.

  Since the molding material of the present invention has excellent thermoplasticity, it can be formed into a molded body by heat molding or the like. Further, the molded body formed of the molding material of the present invention has good thermoplasticity, moldability, heat resistance, rigidity, impact resistance, for example, components such as automobiles, home appliances, electrical and electronic equipment, It can be suitably used as a machine part, a house / building material, or the like. Moreover, since it is a plant-derived resin, it can be replaced with a conventional petroleum-derived resin as a material that can contribute to the prevention of global warming.

In the present invention, the hydrogen atom of the hydroxyl group contained in cellulose is
A cellulose derivative comprising at least one group substituted in A) below and at least one group substituted in B) below;
It contains at least one of the repeating unit represented by the following general formula (p1) and the repeating unit represented by the following general formula (p2), and at least one terminal group has the following general formula (p1-1), (p1 -2), a molding material containing a polyether compound which is a group represented by (p2-1) or (p2-2).
A) Hydrocarbon group: -R _A
B) Acyl group: —CO—R _B (R _B represents a hydrocarbon group.)
_{-CH 2 CH (R p) O-} ··· (p1)
_{- (CH 2) p O- ···} (p2)
[In the general formulas (p1) and (p2), R _p represents an alkyl group having 1 to 6 carbon atoms, an alkoxyl group having 1 to 6 carbon atoms, or a halogen atom. The alkyl group may have a halogen atom or an allyloxy group as a substituent. p represents an integer of 2 to 5. ]
—CH ₂ CH (R _p ) O—R _m1 (p1-1)
R _m2 —CH ₂ CH (R _p ) O— (p1-2)
_{- (CH 2) p O-} R m1 ··· (p2-1)
_{R m2 - (CH 2) p} O- ··· (p2-2)
[In the general formulas (p1-1), (p1-2), (p2-1), and (p2-2), R _p represents an alkyl group having 1 to 6 carbon atoms, an alkoxyl group having 1 to 6 carbon atoms, or Represents a halogen atom. The alkyl group may have a halogen atom or an allyloxy group as a substituent. p represents an integer of 2 to 5. R _m1 represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms. R _m2 represents a hydrogen atom, an alkoxyl group having 1 to 20 carbon atoms, a hydroxyl group, or an acyloxy group having 2 to 20 carbon atoms. ]
Hereinafter, the present invention will be described in detail.

1. Cellulose derivative The cellulose derivative contained in the molding material of the present invention has a hydrogen atom of a hydroxyl group contained in cellulose.
A cellulose derivative comprising at least one group substituted with A) below and at least one group substituted with B) below.
A) Hydrocarbon group: -R _A
B) Acyl group: —CO—R _B (R _B represents a hydrocarbon group.)
That is, the cellulose derivative in the present invention is a cellulose ether ester, and at least a part of the hydrogen atoms of the hydroxyl group contained in cellulose {(C ₆ H ₁₀ O ₅ ) _n } is A) a hydrocarbon group: —R _A , B) Acyl group: substituted with —CO—R _B (R _B represents a hydrocarbon group).
More specifically, the cellulose derivative in the present invention has a repeating unit represented by the following general formula (A).

In the above general formula (A), R ² , R ³ and R ⁶ are each independently a hydrogen atom, A) a hydrocarbon group: —R _A , B) an acyl group: —CO—R _B (R _B is carbonized) Represents a hydrogen group) or other substituents. However, at least a part of R ² , R ³ , and R ⁶ represents A) a hydrocarbon group, and at least a part of R ² , R ³ , and R ⁶ represents B) an acyl group.

As described above, the cellulose derivative in the present invention has thermoplasticity due to etherification and esterification of at least part of the hydroxyl group of the β-glucose ring by A) a hydrocarbon group and B) an acyl group. It can be expressed and is suitable for molding.
Furthermore, since cellulose is a completely plant-derived component, it is carbon neutral and can greatly reduce the burden on the environment.

  The “cellulose” referred to in the present invention is a polymer compound in which a large number of glucoses are bonded by β-1,4-glycosidic bonds, and the carbon atoms at the 2nd, 3rd and 6th positions in the glucose ring of cellulose. Means that the hydroxyl group bonded to is unsubstituted. Further, “hydroxyl group contained in cellulose” refers to a hydroxyl group bonded to carbon atoms at the 2nd, 3rd and 6th positions in the glucose ring of cellulose.

The cellulose derivative only needs to contain the A) hydrocarbon group and B) acyl group in any part of the whole, and may be composed of the same repeating unit, or a plurality of types. It may consist of repeating units. The cellulose derivative does not need to contain all of the A) hydrocarbon group and B) acyl group in one repeating unit.
More specific embodiments include the following embodiments, for example.
(1) At least one of R ² , R ³ and R ⁶ is A) a repeating unit substituted with a hydrocarbon group, and at least one of R ² , R ³ and R ⁶ is substituted with B) an acyl group A cellulose derivative composed of repeating units.
(2) At least one of R ² , R ³ and R ⁶ of one repeating unit is substituted with A) a hydrocarbon group, and at least one of the other is substituted with B) an acyl group ( That is, a cellulose derivative composed of the same type of repeating units having the substituents A) and B) in one repeating unit.
(3) A cellulose derivative in which repeating units having different substitution positions and different types of substituents are bonded at random.
The cellulose derivative may contain an unsubstituted repeating unit (that is, a repeating unit in which R ² , R ³ and R ⁶ are all hydrogen atoms in the general formula (A)).
Moreover, the cellulose derivative may have other substituents other than a hydrogen atom, A) a hydrocarbon group, and B) an acyl group.

A) Hydrocarbon group: -R _A may be either an aliphatic group or an aromatic group.
When R _A is an aliphatic group, it may be linear, branched, or cyclic, and may have an unsaturated bond. Examples of the aliphatic group include an alkyl group, a cycloalkyl group, an alkenyl group, and an alkynyl group.
When R _A is an aromatic group, it may be either a single ring or a condensed ring. When _RA is an aromatic group, the preferable carbon number is 6-18, More preferably, it is 6-14, More preferably, it is 6-10. Examples of the aromatic group include a phenyl group, a naphthyl group, a phenanthryl group, and an anthryl group.
A) The hydrocarbon group is preferably an aliphatic group because the resulting molding material (hereinafter sometimes referred to as “resin composition”) is excellent in impact resistance, and a molding process such as a melt flow rate is preferable. From the viewpoint of excellent properties, an alkyl group is more preferable, and an alkyl group having 1 to 4 carbon atoms (lower alkyl group) is more preferable. Specific examples include methyl group, ethyl group, propyl group, isopropyl group, butyl group, isobutyl group, pentyl group, hexyl group, heptyl group, 2-ethylhexyl group, tert-butyl group, isoheptyl group, and the like. A group or an ethyl group is particularly preferred.

B) an acyl group: In _{-CO-R B, R B} represents a hydrocarbon group. R _B is an aliphatic group, and may be any aromatic group.
If R _B is an aliphatic group, straight chain, branched, and may be any of circular, it may have an unsaturated bond. Examples of the aliphatic group include an alkyl group, a cycloalkyl group, an alkenyl group, and an alkynyl group.
If R _B is an aromatic group may be either monocyclic and condensed. Examples of the aromatic group include a phenyl group, a naphthyl group, a phenanthryl group, and an anthryl group.
R _B is preferably an alkyl group or an aryl group. R _B is more preferably an alkyl group having 1 to 12 carbon atoms or an aryl group, and further preferably an alkyl group having 1 to 12 carbon atoms, which has a high Tg and improves flexural modulus and deflection temperature under load. Particularly preferred is an alkyl group having 1 to 4 carbon atoms (preferably methyl group, ethyl group, propyl group), and most preferred is an alkyl group having 1 or 2 carbon atoms (namely, methyl group or ethyl group). .
Also, R _B, it from the viewpoint of impact resistance and moldability is a hydrocarbon group having a branched structure having 3 to 10 carbon atoms, an alkyl group having a branched structure having 3 to 10 carbon atoms More preferred is an alkyl group having a branched structure having 7 to 9 carbon atoms.
The R _B, specifically, a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, a pentyl group, a hexyl group, a heptyl group, 1-ethylpentyl group, 2-ethylhexyl group, tert- A butyl group, an isoheptyl group, etc. are mentioned. Preferably, R _B is a methyl group, an ethyl group, a propyl group, or a 3-heptyl group, more preferably a methyl group, an ethyl group, or a 3-heptyl group.

The cellulose derivative in the molding material of the present invention is a cellulose derivative in which the hydrogen atom of the hydroxyl group contained in cellulose contains at least one group substituted with A) and at least one group substituted with B). However, it is preferable from the viewpoint of impact resistance that it further contains at least one group in which the hydrogen atom of the hydroxyl group contained in cellulose is substituted by the following C).
C) a group containing an alkyleneoxy group: —R _C2 —O— and an acyl group: —CO—R _C1 (R _C1 represents a hydrocarbon group, and R _C2 represents an alkylene group having 2 to 4 carbon atoms. )

In the acyl group (—CO—R _C1 ) contained in C), R _C1 represents a hydrocarbon group. As the hydrocarbon group represented by R _{C1, the same} groups as those described above for R _B can be applied. The preferred range of R _C1 is the same as R _B.

In the alkyleneoxy group (—R _C2 —O—) contained in C), R _C2 represents an alkylene group having 2 to 4 carbon atoms. R _C2 may be linear, branched or cyclic, but is preferably linear or branched, and more preferably branched.
As the alkyleneoxy group (—R _C2 —O—), an alkyleneoxy group having 2 or 3 carbon atoms is preferable. Specific examples of the alkyleneoxy group preferably include the following structures.

Among them, a group represented by the following formula (1) or (2) in which —RC ₂ —O— is branched is preferable because the obtained molding material has excellent bending elastic modulus.

  The group C) may contain a plurality of alkyleneoxy groups or may contain only one. Preferably, the group of C) can be represented by the following general formula (3).

In the general formula (3), R _C1 represents a hydrocarbon group, and R _C2 represents an alkylene group having 2 to 4 carbon atoms. The preferred ranges of R _C1 and R _C2 are the same as those described above. n is an integer of 1 or more. The upper limit of n is not particularly limited, and varies depending on the amount of alkyleneoxy group introduced, but is about 10, for example. n is preferably 1 to 5, more preferably 1 to 3, and still more preferably 1.
When a plurality of R _C2 are present, they may be the same or different from each other, but are preferably the same.
In addition, the cellulose derivative in the present invention is a group of C) containing only one alkyleneoxy group (a group in which n is 1 in the general formula (3)) and C) containing two or more alkyleneoxy groups. And a group (a group in which n is 2 or more in the above general formula (3)).

Further, the bonding direction of the alkyleneoxy group to the cellulose derivative in the group C) is not particularly limited, but it is preferable that the alkylene group part (R _C2 ) of the alkyleneoxy group is bonded to the β-glucose ring structure side.

R _A in A), R B in _B ), R _C1 and R _C2 in C) may have a further substituent or may be unsubstituted, but are preferably unsubstituted.

_{R A} in the A), _{R B} in the B), in the case where the _{where R C1} and _{R C2} in the C) has a further substituent, examples of the further substituent include a halogen atom (e.g. fluorine atom, chlorine atom, bromine Atoms, iodine atoms), hydroxy groups, alkoxy groups (the alkyl group portion preferably has 1 to 5 carbon atoms), alkenyl groups, and the like. However, even when a substituent is included, R _C2 has 2 or 3 carbon atoms. In _the case R A, _{R B,} and _{R C1} is other than alkyl group, an alkyl group (preferably having from 1 to 5 carbon atoms) may have as a substituent.

In particular, when R _B and R _C1 have a further substituent, it is preferable that they substantially have no carboxyl group, sulfonic acid group, and salts thereof. When the cellulose derivative is substantially free of carboxyl groups, sulfonic acid groups, and salts thereof, the molding material of the present invention can be made water-insoluble and the moldability can be further improved. In addition, when the cellulose derivative has a carboxyl group, a sulfonic acid group, and a salt thereof, it is known that the compound stability is deteriorated, and in particular, thermal decomposition may be promoted. It is preferable.
Note that “substantially free of carboxyl groups, sulfonic acid groups, and salts thereof” means only when the cellulose derivative in the present invention has no carboxyl groups, sulfonic acid groups, and salts thereof. In addition, the case where the cellulose derivative in the present invention has a trace amount of carboxyl groups, sulfonic acid groups, and salts thereof in a range insoluble in water is included. For example, a cellulose which is a raw material may contain a carboxyl group, and a cellulose derivative in which the substituents A) to C) are introduced using this may contain a carboxyl group. , A sulfonic acid group, and a cellulose derivative substantially free of salts thereof.
In this case, the preferred content of the carboxyl group, sulfonic acid group, and salts thereof is 1% by mass or less, more preferably 0.5% by mass or less, based on the cellulose derivative.

  Moreover, it is preferable that the cellulose derivative in this invention is insoluble in water. Here, “being insoluble in water” means that the solubility in 100 parts by mass of water at 25 ° C. is 5 parts by mass or less.

As a specific example of the cellulose derivative in the present invention,
Acetyl methyl cellulose, acetyl ethyl cellulose, acetyl propyl cellulose, acetyl butyl cellulose, acetyl pentyl cellulose, acetyl hexyl cellulose, acetyl cyclohexyl cellulose, acetyl phenyl cellulose, acetyl naphthyl cellulose,

Propionylmethylcellulose, propionylethylcellulose, propionylpropylcellulose, propionylbutylcellulose, propionylpentylcellulose, propionylhexylcellulose, propionylcyclohexylcellulose, propionylphenylcellulose, propionylnaphthylcellulose,

Butyrylmethylcellulose, butyrylethylcellulose, butyrylpropylcellulose, butyrylbutylcellulose, butyrylpentylcellulose, butyrylhexylcellulose, butyrylcyclohexylcellulose, butyrylphenylcellulose, butyrylnaphthylcellulose,

Methylcellulose-2-ethylhexanoate, ethylcellulose-2-ethylhexanoate, propylcellulose-2-ethylhexanoate, butylcellulose-2-ethylhexanoate, pentylcellulose-2-ethylhexanoate, hexylcellulose -2-ethylhexanoate, cyclohexylcellulose-2-ethylhexanoate, phenylcellulose-2-ethylhexanoate, naphthylcellulose-2-ethylhexanoate,

Acetoxyethylmethylacetylcellulose, acetoxyethylethylacetylcellulose, acetoxyethylpropylacetylcellulose, acetoxyethylbutylacetylcellulose, acetoxyethylpentylacetylcellulose, acetoxyethylhexylacetylcellulose, acetoxyethylcyclohexylacetylcellulose, acetoxyethylphenylacetylcellulose, acetoxyethylnaphthyl Acetylcellulose,

Acetoxyethylmethylpropionylcellulose, acetoxyethylethylpropionylcellulose, acetoxyethylpropylpropionylcellulose, acetoxyethylbutylpropionylcellulose, acetoxyethylpentylpropionylcellulose, acetoxyethylhexylpropionylcellulose, acetoxyethylcyclohexylpropionylcellulose, acetoxyethylphenylpropionylcellulose, acetoxyethylnaphthyl Propionyl cellulose,

Acetoxyethylmethylcellulose-2-ethylhexanoate, acetoxyethylethylcellulose-2-ethylhexanoate, acetoxyethylpropylcellulose-2-ethylhexanoate, acetoxyethylbutylcellulose-2-ethylhexanoate, acetoxyethylpentylcellulose 2-ethylhexanoate, acetoxyethylhexylcellulose-2-ethylhexanoate, acetoxyethylcyclohexylcellulose-2-ethylhexanoate, acetoxyethylphenylcellulose-2-ethylhexanoate, acetoxyethylnaphthylcellulose-2- Ethyl hexanoate,

Propionyloxyethyl methyl acetylcellulose, propionyloxyethyl ethyl acetylcellulose, propionyloxyethylpropyl acetylcellulose, propionyloxyethylbutylacetylcellulose, propionyloxyethylpentylacetylcellulose, propionyloxyethylhexylacetylcellulose, propionyloxyethylcyclohexylacetylcellulose, propionyloxy Ethylphenylacetylcellulose, propionyloxyethylnaphthylacetylcellulose,

Propionyloxyethylmethylpropionylcellulose, propionyloxyethylethylpropionylcellulose, propionyloxyethylpropylpropionylcellulose, propionyloxyethylbutylpropionylcellulose, propionyloxyethylpentylpropionylcellulose, propionyloxyethylhexylpropionylcellulose, propionyloxyethylcyclohexylpropionylcellulose, Ethylphenylpropionylcellulose, propionyloxyethylnaphthylpropionylcellulose,

Propionyloxyethylmethylcellulose-2-ethylhexanoate, propionyloxyethylethylcellulose-2-ethylhexanoate, propionyloxyethylpropylcellulose-2-ethylhexanoate, propionyloxyethylbutylcellulose-2-ethylhexanoate, Propionyloxyethylpentylcellulose-2-ethylhexanoate, propionyloxyethylhexylcellulose-2-ethylhexanoate, propionyloxyethylcyclohexylcellulose-2-ethylhexanoate, propionyloxyethylphenylcellulose-2-ethylhexanoate , Propionyloxyethyl naphthylcellulose-2-ethylhexanoate,

Acetoxypropylmethylacetylcellulose, acetoxypropylethylacetylcellulose, acetoxypropylpropylacetylcellulose, acetoxypropylbutylacetylcellulose, acetoxypropylpentylacetylcellulose, acetoxypropylhexylacetylcellulose, acetoxypropylcyclohexylacetylcellulose, acetoxypropylphenylacetylcellulose, acetoxypropyl Naphthylacetylcellulose,

Propionyloxypropylmethylacetylcellulose, propionyloxypropylethylacetylcellulose, propionyloxypropylpropylacetylcellulose, propionyloxypropylbutylacetylcellulose, propionyloxypropylpentylacetylcellulose, propionyloxypropylhexylacetylcellulose, propionyloxypropylcyclohexylacetylcellulose, propionyl Oxypropylphenylacetylcellulose, propionyloxypropylnaphthylacetylcellulose,

Examples include valeroxypropylmethyl valeroyl cellulose and valeroxybutyl methyl valeroyl cellulose.

  The molding material of the present invention may contain only one kind of the specific cellulose derivative, or may contain two or more kinds.

A) Hydrocarbon group: —R _A , B) Acyl group: —CO—R _B , and C) Alkyleneoxy group: —R _C2 —O— and acyl group: —CO—R _C1 in the cellulose derivative of the present invention And the number of substitution groups per β-glucose ring unit (substitution degree) are not particularly limited.

For example, A) Hydrocarbon group: Degree of substitution DS _{A of} -R _A (number of R _A with respect to hydroxyl groups at the 2nd, 3rd and 6th positions of the β-glucose ring in the repeating unit) is 1.0 <DS _A It is preferable that 1.0 <DS _A <2.5. Further, DS _A is preferably 1.1 or more.
B) Degree of substitution DS _{B of} acyl group (—CO—R _B ) (number of —CO—R _B with respect to hydroxyl groups at the 2nd, 3rd and 6th positions of the cellulose structure of the β-glucose ring in the repeating unit) 0.1 <DS _B is preferable, and 0.1 <DS _B <2.0 is more preferable.
C) Degree of substitution DS _C of a group containing an alkyleneoxy group: —R _C2 —O— and an acyl group: —CO—R _C1 (in the repeating unit, the 2nd, 3rd and 6th positions of the cellulose structure of the β-glucose ring) position of C to the hydroxyl group) alkyleneoxy _{group: -R} C2 -O- acyl group: the number of groups containing a _{-CO-R C1)} is preferably _{0 <DS C, 0 <DS} C <1 0.0 is more preferable. 0 <By a DS _C, it is possible to lower the melting initiation temperature of the cellulose derivative can be performed thermoforming easier.
By setting the degree of substitution within the above range, mechanical strength, moldability, and the like can be improved.

Further, the number of unsubstituted hydroxyl groups present in the cellulose derivative is not particularly limited. The degree of substitution DS _{H of} hydrogen atoms (ratio in which the hydroxyl groups at the 2nd, 3rd and 6th positions in the repeating unit are unsubstituted) can be in the range of 0 to 1.5, preferably 0 to 0.6. And it is sufficient. By the DS _H and 0.6 or less, or to improve the fluidity of the molding material, the foaming and the like due to water absorption of the molding material during acceleration and molding of the pyrolysis can or is suppressed.

In addition, the cellulose derivative in the present invention may have a substituent other than A) a hydrocarbon group, B) an acyl group, and C) a group containing an alkyleneoxy group and an acyl group. Examples of the substituent that may be included include a hydroxyethyl group, a hydroxypropyl group, a hydroxyethoxyethyl group, a hydroxypropoxypropyl group, a hydroxyethoxyethoxyethyl group, and a hydroxypropoxypropoxypropyl group. Therefore, the sum of the degree of substitution of all the substituents of the cellulose derivative is 3, but (DS _A + DS _B + DS _C + DS _H ) is 3 or less.

  The amount of alkyleneoxy group introduced in the group C) is expressed in terms of molar substitution (MS: number of moles of substituent introduced per glucose residue) (edited by Cellulose Society, Cellulose Dictionary P142). The molar substitution degree MS of the alkyleneoxy group is preferably 0 <MS, more preferably 0 <MS ≦ 1.5, and still more preferably 0 <MS <1.0. When MS is 1.5 or less (MS ≦ 1.5), heat resistance, moldability and the like can be improved, and a cellulose derivative suitable for a molding material can be obtained.

  The cellulose derivative in the molding material of the present invention is a cellulose derivative in which the hydrogen atom of the hydroxyl group contained in cellulose contains at least one group substituted with A) and at least one group substituted with B). However, when a hydrogen atom of a hydroxyl group contained in cellulose is substituted, from the viewpoint of moldability, it is substituted only by A) and B) or A), B), and C. ) Is preferred. That is, in the cellulose derivative in the present invention, it is preferable that the hydrogen atom of the hydroxyl group contained in the cellulose is not substituted with a group other than the above A), B), and C).

The molecular weight of the cellulose derivative in the present invention is preferably a number average molecular weight (Mn) in the range of 5 × 10 ^{3 to} 1000 × 10 ³ , more preferably in the range of 10 × 10 ^{3 to} 500 × 10 ³ , and 10 × 10 ³ to A range of 200 × 10 ³ is most preferred. The mass average molecular weight (Mw) is preferably in the range of 7 × 10 ^{3 to} 10000 × 10 ³ , more preferably in the range of 15 × 10 ^{3 to} 5000 × 10 ³ , and in the range of 100 × 10 ^{3 to} 3000 × 10 ³ . Is most preferred. By setting the average molecular weight within this range, it is possible to improve the moldability and mechanical strength of the molded body.
The molecular weight distribution (MWD) is preferably in the range of 1.1 to 10.0, and more preferably in the range of 1.5 to 8.0. By setting the molecular weight distribution within this range, moldability and the like can be improved.
In the present invention, the number average molecular weight (Mn), mass average molecular weight (Mw) and molecular weight distribution (MWD) can be measured using gel permeation chromatography (GPC). Specifically, N-methylpyrrolidone can be used as a solvent, a polystyrene gel can be used, and the molecular weight can be obtained using a conversion molecular weight calibration curve obtained in advance from a constituent curve of standard monodisperse polystyrene.

2. Method for Producing Cellulose Derivative The method for producing a cellulose derivative in the present invention is not particularly limited, and the cellulose derivative in the present invention can be produced by using cellulose as a raw material and etherifying and esterifying cellulose. The raw material for cellulose is not limited, and examples thereof include cotton, linter, and pulp.

A preferred embodiment of the method for producing a cellulose derivative having the above-mentioned A) hydrocarbon group: -R _A and B) acyl group: -CO-R _B (R _B represents a hydrocarbon group) includes cellulose ether, It includes a step of esterification by reacting acid chloride or acid anhydride in the presence.
As the cellulose ether, for example, one in which at least a part of the hydrogen atoms of the hydroxyl groups at the 2nd, 3rd and 6th positions of the β-glucose ring contained in cellulose is substituted with a hydrocarbon group can be used. Specific examples include methyl cellulose, ethyl cellulose, propyl cellulose, butyl cellulose, allyl cellulose, and benzyl cellulose.

A) hydrocarbon group: —R _A , B) acyl group: —CO—R _B (R _B represents a hydrocarbon group), and C) alkyleneoxy group: —R _C2 —O— and an acyl group: A preferred embodiment of a method for producing a cellulose derivative having a group containing —CO—R _C1 (R _C1 represents a hydrocarbon group, and R _C2 represents an alkylene group having 2 to 4 carbon atoms) is a hydrocarbon group. And hydroxyethyl cellulose ether having a hydroxyethyl group or hydroxypropyl cellulose ether having a hydroxypropyl group are reacted by an acid chloride or an acid anhydride to react with the esterification (acylation). is there.
Further, as another embodiment, for example, after etherification with cellulose ether such as methyl cellulose or ethyl cellulose with propylene oxide or the like, alkyl chloride such as methyl chloride or ethyl chloride / alkylene oxide having 3 carbon atoms or the like is allowed to act on cellulose. Furthermore, a method including a step of esterification by reacting an acid chloride or an acid anhydride is also included.
As a method for reacting acid chloride, for example, the method described in Cellulose 10; 283-296, 2003 can be used.
Specific examples of the cellulose ether having a hydrocarbon group and a hydroxyethyl group include hydroxyethyl methyl cellulose, hydroxyethyl ethyl cellulose, hydroxyethyl propyl cellulose, hydroxyethyl allyl cellulose, and hydroxyethyl benzyl cellulose. Preferred are hydroxyethyl methyl cellulose and hydroxyethyl ethyl cellulose.
Specific examples of the cellulose ether having a hydrocarbon group and a hydroxypropyl group include hydroxypropylmethylcellulose, hydroxypropylethylcellulose, hydroxypropylpropylcellulose, hydroxypropylallylcellulose, hydroxypropylbenzylcellulose, and the like. Preferred are hydroxypropylmethylcellulose and hydroxypropylethylcellulose.

  As the acid chloride, B) acyl group and carboxylic acid chloride corresponding to the acyl group contained in C) can be used. Examples of the carboxylic acid chloride include acetyl chloride, propionyl chloride, butyryl chloride, isobutyryl chloride, pentanoyl chloride, 2-methylbutanoyl chloride, 3-methylbutanoyl chloride, pivaloyl chloride, hexanoyl chloride, 2-methylpentanoyl chloride, 3-methylpentanoyl chloride, 4-methylpentanoyl chloride, 2,2-dimethylbutanoyl chloride, 2,3-dimethylbutanoyl chloride, 3,3-dimethylbutanoyl chloride, 2- Ethylbutanoyl chloride, heptanoyl chloride, 2-methylhexanoyl chloride, 3-methylhexanoyl chloride, 4-methylhexanoyl chloride, 5-methylhexanoyl chloride, 2,2-dimethylpentanoyl chloride, , 3-dimethylpentanoyl chloride, 3,3-dimethylpentanoyl chloride, 2-ethylpentanoyl chloride, cyclohexanoyl chloride, octanoyl chloride, 2-methylheptanoyl chloride, 3-methylheptanoyl chloride, 4-methyl Heptanoyl chloride, 5-methylheptanoyl chloride, 6-methylheptanoyl chloride, 2,2-dimethylhexanoyl chloride, 2,3-dimethylhexanoyl chloride, 3,3-dimethylhexanoyl chloride, 2-ethylhexanoyl Chloride, 2-propylpentanoyl chloride, nonanoyl chloride, 2-methyloctanoyl chloride, 3-methyloctanoyl chloride, 4-methyloctanoyl chloride, 5-methyloctanoyl chloride, 6-methyloctanoy Chloride, 2,2-dimethylheptanoyl chloride, 2,3-dimethylheptanoyl chloride, 3,3-dimethylheptanoyl chloride, 2-ethylheptanoyl chloride, 2-propylhexanoyl chloride, 2-butylpentanoyl chloride, Decanoyl chloride, 2-methylnonanoyl chloride, 3-methylnonanoyl chloride, 4-methylnonanoyl chloride, 5-methylnonanoyl chloride, 6-methylnonanoyl chloride, 7-methylnonanoyl chloride, 2,2- Examples include dimethyloctanoyl chloride, 2,3-dimethyloctanoyl chloride, 3,3-dimethyloctanoyl chloride, 2-ethyloctanoyl chloride, 2-propylheptanoyl chloride, 2-butylhexanoyl chloride and the like.

As the acid anhydride, for example, carboxylic acid anhydrides corresponding to the acyl group contained in the above B) acyl group and C) can be used. Examples of such carboxylic anhydrides include acetic anhydride, propionic anhydride, butyric anhydride, valeric anhydride, hexanoic anhydride, heptanoic anhydride, octanoic anhydride, 2-ethylhexanoic acid. An anhydride, nonanoic acid anhydride, etc. are mentioned.
As described above, since the cellulose derivative in the present invention preferably has no carboxylic acid as a substituent, for example, a dicarboxylic acid such as phthalic anhydride, maleic anhydride, or the like, and a compound that generates a carboxyl group by reacting with cellulose. It is preferable not to use.

  Other specific production conditions and the like can follow conventional methods. For example, a method described in “Encyclopedia of Cellulose” pages 131 to 164 (Asakura Shoten, 2000) can be referred to.

3. Polyether Compound The molding material of the present invention contains at least one of the cellulose derivative, a repeating unit represented by the following general formula (p1) and a repeating unit represented by the following general formula (p2), and at least 1 One terminal group contains the polyether compound which is group represented by the following general formula (p1-1), (p1-2), (p2-1), or (p2-2).
_{-CH 2 CH (R p) O-} ··· (p1)
_{- (CH 2) p O- ···} (p2)
[In the general formulas (p1) and (p2), R _p represents an alkyl group having 1 to 6 carbon atoms, an alkoxyl group having 1 to 6 carbon atoms, or a halogen atom. The alkyl group may have a halogen atom or an allyloxy group as a substituent. p represents an integer of 2 to 5. ]
—CH ₂ CH (R _p ) O—R _m1 (p1-1)
R _m2 —CH ₂ CH (R _p ) O— (p1-2)
_{- (CH 2) p O-} R m1 ··· (p2-1)
_{R m2 - (CH 2) p} O- ··· (p2-2)
[In the general formulas (p1-1), (p1-2), (p2-1), and (p2-2), R _p represents an alkyl group having 1 to 6 carbon atoms, an alkoxyl group having 1 to 6 carbon atoms, or Represents a halogen atom. The alkyl group may have a halogen atom or an allyloxy group as a substituent. p represents an integer of 2 to 5. R _m1 represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms. R _m2 represents a hydrogen atom, an alkoxyl group having 1 to 20 carbon atoms, a hydroxyl group, or an acyloxy group having 2 to 20 carbon atoms. ]

  Since the polyether compound is excellent in compatibility with the cellulose derivative, the molded product obtained from the molding material of the present invention is easy to relieve stress and has a very high falling ball impact strength. Furthermore, since the flow characteristics of the polyether compound are good, it has the effect of improving the moldability (fluidity at the time of melting) as a molding material. The polyether compound is also characterized by good biodegradability because it is not substituted with an aromatic group such as a phenyl group, an alkylphenyl group, or an arylphenyl group that has low biodegradability.

The polyether compound preferably comprises at least one of the repeating unit represented by the general formula (p1) and the repeating unit represented by the general formula (p2) and the terminal group.
When the polyether compound has a repeating unit represented by the general formula (p1), at least one terminal group is preferably represented by the general formula (p1-1) or (p1-2). When it has the repeating unit represented by p2), it is preferable that at least one terminal group is represented by the general formula (p2-1) or (p2-2).

The terminal group in the said polyether compound is demonstrated.
R _m1 in the general formulas (p1-1) and (p2-1) is preferably a hydrogen atom or an alkyl group having 1 to 16 carbon atoms, and more preferably hydrogen, because the compatibility with the cellulose derivative is more excellent. It is an atom or a C1-C12 alkyl group, Most preferably, it is a hydrogen atom or a C1-C8 alkyl group.
Specific examples of the alkyl group having 1 to 20 carbon atoms include methyl group, ethyl group, propyl group, isopropyl group, butyl group, isobutyl group, pentyl group, hexyl group, heptyl group, 2-ethylhexyl group, and tert-butyl. Group, isoheptyl group, stearyl group, lauryl group, etc., methyl group, ethyl group, propyl group, isopropyl group, butyl group, isobutyl group, pentyl group, hexyl group, heptyl group, 2-ethylhexyl group, tert-butyl Group, isoheptyl group is preferable.

When R _m2 in the general formulas (p1-2) and (p2-2) represents an alkoxyl group having 1 to 20 carbon atoms, specifically, the alkoxyl group having 1 to 20 carbon atoms is specifically the above R _m1 is alkyl. In the case of a group, an oxygen atom is bonded to an alkyl group, and a methyloxy group, an ethyloxy group, a propyloxy group, an isopropyloxy group, a butyloxy group, an isobutyloxy group, a pentyloxy group, a hexyloxy group, a heptyloxy group , 2-ethylhexyloxy group, tert-butyloxy group, isoheptyloxy group, stearyloxy group, lauryloxy group, etc., including methyloxy group, ethyloxy group, propyloxy group, isopropyloxy group, butyloxy group, isobutyloxy group , Pentyloxy group, hexyloxy group, heptyloxy Group, 2-ethylhexyl group, tert- butyloxy, iso-heptyloxy group.
When R _m2 in the general formulas (p1-2) and (p2-2) represents an alkyl group having 1 to 20 carbon atoms, specific examples and preferred ranges of the alkyl group are specific examples in the case where R _m1 represents an alkyl group. The examples and preferred ranges are the same.
When R _m2 in the general formulas (p1-2) and (p2-2) represents an acyloxy group having 2 to 20 carbon atoms, specific examples of the acyloxy group having 2 to 20 carbon atoms include an acetyloxy group and propionyl. Examples include oxy group, butyryloxy group, valeroyloxy group, 2-ethylhexanoyloxy group, stearoyloxy group, lauroyloxy group, acetyloxy group, propionyloxy group, butyryloxy group, valeroyloxy group, 2-ethyl. A hexanoyloxy group is preferred.
The end groups in the polyether compound may be the same or different.

In the general formula (p1), _{R p} represents an alkyl group having 1 to 6 carbon atoms, an alkoxyl group having 1 to 6 carbon atoms, or a halogen atom. The alkyl group may have a halogen atom or an allyloxy group as a substituent. R _p is preferably an alkyl group having 1 to 4 carbon atoms, an alkoxyl group having 1 to 4 carbon atoms, or a chlorine atom, and more preferably 1 to 1 carbon atoms, because the molded article obtained has excellent impact resistance. 3 alkyl group, or an alkoxyl group having 1 to 3 carbon atoms, most preferably an alkyl group having 1 to 2 carbon atoms, or an alkoxyl group having 1 to 2 carbon atoms.

  In general formula (p1), p represents an integer of 2 to 5, and is preferably an integer of 2 to 4 and more preferably an integer of 2 to 3 because of excellent compatibility with the cellulose derivative.

The polyether compound may have both a repeating unit represented by the general formula (p1) and a repeating unit represented by the general formula (p2). Moreover, you may have 2 or more types of repeating units represented by general formula (p1), and may have 2 or more types of repeating units represented by general formula (p2).
When the polyether compound has both the repeating unit represented by the general formula (p1) and the repeating unit represented by the general formula (p2), the repeating unit represented by the general formula (p1) and the general formula (p2) The content ratio with the repeating unit represented is preferably from 2:98 to 50:50, more preferably from 5:95 to 25:75, in terms of molar ratio.
In the present invention, the polyether compound has a repeating unit represented by the general formula (p2), one terminal group is represented by the general formula (p2-1), R _m1 is a hydrogen atom, The other end group is preferably represented by the above general formula (p2-2), and R _m2 is preferably a hydroxyl group, since the impact resistance of the molded article is excellent.
In the polyether compound in the present invention, the content of the repeating unit represented by the general formula (p1) and the repeating unit represented by the general formula (p2) is excellent in compatibility with the cellulose derivative of the present invention. The ratio of the repeating unit of general formula (p2) to all repeating units is preferably 70 to 100 mol%, more preferably 85 to 100 mol%.
In the present invention, the polyether compound may have other repeating units other than the general formulas (p1) and (p2), but the compatibility with the cellulose derivative of the present invention is reduced, and the resulting molded article It is preferable not to have the falling ball impact strength. That is, when the polyether compound is composed of only the repeating unit represented by the general formula (p1), the polyether compound is composed of only the repeating unit represented by the general formula (p2), or the repeating unit represented by the general formula (p1). The case where it consists only of a unit and the repeating unit represented by general formula (p2) is preferable. When a polyether compound has another repeating unit, it is preferable that it is 1-30 mol% with respect to all the repeating units, and it is more preferable that it is 1-20 mol%.

Specific examples of the polyether compound include polyethylene glycol, polypropylene glycol, polyepichlorohydrin, ethylene glycol / propylene glycol copolymer, epichlorohydrin / ethylene oxide / allyl glycidyl ether copolymer, ethylene glycol / propylene. Examples include glycol / allyl glycidyl ether copolymer, polyoxyethylene dimethyl ether, polyoxyethylene monostearate, polyoxyethylene monooleate, polyoxyethylene dilaurate, polyoxyethylene distearate, polyoxyethylene diolate, etc. It is not limited to. Among these, polyethylene glycol and ethylene glycol / propylene glycol copolymer are preferable.
These polyether compounds are industrially available, and various structures and molecular weights are sold by Sumitomo Seika Kogyo Co., Ltd., Meisei Chemical Industry Co., Ltd., Nippon Zeon Co., Ltd., and the like.

  Although it does not specifically limit as molecular weight of a polyether compound, The falling ball impact strength of the resin composition obtained by being 10,000-10,000,000 as polystyrene conversion mass mean molecular weight improves, The said cellulose derivative and Since compatibility is also good, it is preferable. It is more preferably 50,000 to 5,000,000, particularly preferably 100,000 to 2,000,000, because it has an excellent balance between falling ball impact strength and moldability.

  It is preferable that the compounding quantity of the polyether compound in the molding material of this invention is 1-50 mass%. By setting the blending amount to 50% by mass or less, the elastic modulus and heat distortion temperature of the obtained resin composition are improved. On the other hand, when the blending amount is 1% by mass or more, the resulting resin composition has good falling ball impact strength and moldability workability (fluidity at the time of melting). The blending amount of the polyether compound in the molding material of the present invention is more preferably 5 to 40% by mass, and particularly preferably 10 to 20% by mass.

4). Molding material and molded body The molding material of the present invention contains the cellulose derivative and the polyether compound described above, and may contain other additives as necessary.
The content rate of the component contained in the molding material of this invention is not specifically limited. Preferably, the cellulose derivative is contained in an amount of 50% by mass or more, more preferably 60% by mass or more and 99% by mass or less, still more preferably 80% by mass or more and 95% by mass or less, and particularly preferably 80% by mass or more and 90% by mass or less.

  In addition to the cellulose derivative and the polyether compound, the molding material of the present invention may contain various additives such as an antioxidant, a filler (reinforcing material), and a flame retardant as necessary.

  The molding material of the present invention preferably further contains an antioxidant. Thereby, since thermal degradation of the cellulose derivative can be suppressed, a sufficient effect can be exhibited even if the amount added to the cellulose derivative is small. Accordingly, it is possible to suppress a decrease in impact resistance, moldability, rigidity, bending strength, heat resistance and the like of a specific cellulose derivative.

  The antioxidant in the present invention may be a low molecular compound or a high molecular compound, for example, a hindered phenol antioxidant, a phosphorus antioxidant, an amine antioxidant, a sulfur oxidation. An inhibitor can be used.

  Specific examples of the hindered phenol antioxidant include triethylene glycol-bis [3- (3-tert-butyl-5-methyl-4-hydroxyphenyl) propionate], pentaerythrityl-tetrakis [3- (3 , 5-di-tert-butyl-4-hydroxyphenyl) propionate], 1.6-hexanediol-bis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate, octadodecyl-3 -(3,5-di-tert-butyl-4-hydroxyphenyl) propionate, N, N'-hexamethylenebis (3,5-di-tert-butyl-4-hydroxy-hydrocinnamamide, 3,5 -Di-t-butyl-4-hydroxy-benzylphosphonate-diethyl ester and 1,3,5-trimethyl-2,4,6-tri (3,5-di -t- butyl-4-hydroxybenzyl) benzene, and the like.

  Phosphorus antioxidants include calcium hypophosphite, 2,6-di-t-butyl-4-methylphenol, tetrakis (methylene-3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate ) Phenol compounds such as methane, tris (3,5-di-t-butyl-4-hydroxybenzidine) isocyanurate, dilauryl-3,3′-thiodipropionate, dimyristyl-3,3′-thiodipropio Examples thereof include sulfur compounds such as nates, phosphorus compounds such as trisnonylphenyl phosphite and distearyl pentaerythritol diphosphite, among which calcium hypophosphite is preferable.

  Examples of amine-based antioxidants include 4-acetoxy-2,2,6,6-tetramethylpiperidine, 4-stearoyloxy-2,2,6,6-tetramethylpiperidine, 4-acryloyloxy-2,2, 6,6-tetramethylpiperidine, 4-methoxy-2,2,6,6-tetramethylpiperidine, 4-benzoyloxy-2,2,6,6-tetramethylpiperidine, 4-cyclohexyloxy-2,2, 6,6-tetramethylpiperidine, 4-phenoxy-2,2,6,6-tetramethylpiperidine, 4-benzyloxy-2,2,6,6-tetramethylpiperidine, 4- (phenylcarbamoyloxy) -2 , 2,6,6-tetramethylpiperidine, bis (2,2,6,6-tetramethyl-4-piperidyl) oxalate, bis (2,2, , 6-tetramethyl-4-piperidyl) malonate, bis (2,2,6,6-tetramethyl-4-piperidyl) adipate, bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate, Bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, bis (1,2,2,6,6-pentamethyl-4-piperidyl) adipate, bis (2,2,6,6- Tetramethyl-4-piperidyl) terephthalate, 1,2-bis (2,2,6,6-tetramethyl-4-piperidyloxy) ethane, bis (2,2,6,6-tetramethyl-4-piperidyl) Hexamethylene-1,6-dicarbamate, tris (2,2,6,6-tetramethyl-4-piperidyl) benzene-1,3,5-tricarboxylate, phenyl-α-naphthyl Amine, phenyl-β-naphthylamine, N, N′-diphenyl-p-phenylenediamine, N-phenyl-N′-cyclohexyl-p-phenylenediamine, N-isopropyl-N′-phenyl-p-phenylenediamine, etc. It is done.

  Specific examples of the sulfur-based antioxidant include sulfur-containing compounds such as thioethers, dithioacid salts such as nickel dithiocarbamate, mercaptobenzimidazole, thiocarbanilide, and thiodipropion ester. Among these, the use of a thiodipropion ester-based compound is particularly preferable.

  As the antioxidant in the present invention, it is preferable to use a hindered phenol-based antioxidant.

  When the molding material of the present invention contains an antioxidant, the content is not limited, but is preferably 0.01 to 5% by mass, more preferably 0.1 to 3% by mass with respect to the molding material. . If it is 0.01% by mass or more, the effect of adding an antioxidant can be obtained, and if it is 5% by mass or less, the impact resistance, moldability, rigidity, bending strength, heat resistance, etc. of the cellulose derivative are reduced. Since it can suppress, it is preferable.

The molding material of the present invention may contain a filler (reinforcing material). By containing the filler, the mechanical properties of the molded body formed of the molding material can be enhanced.
A well-known thing can be used as a filler. The shape of the filler may be any of fibrous, plate-like, granular, powdery and the like. Further, it may be inorganic or organic.
Specifically, as the inorganic filler, glass fiber, carbon fiber, graphite fiber, metal fiber, potassium titanate whisker, aluminum borate whisker, magnesium whisker, silicon whisker, wollastonite, sepiolite, slag fiber, zonolite, Elastadite, gypsum fiber, silica fiber, silica-alumina fiber, zirconia fiber, boron nitride fiber, silicon nitride fiber and boron fiber, and other inorganic fillers; glass flakes, non-swellable mica, carbon black, graphite, metal foil , Ceramic beads, talc, clay, mica, sericite, zeolite, bentonite, dolomite, kaolin, fine silicate, feldspar, potassium titanate, shirasu balloon, calcium carbonate, magnesium carbonate, barium sulfate, calcium oxide Beam, aluminum oxide, titanium oxide, magnesium oxide, aluminum silicate, silicon oxide, aluminum hydroxide, magnesium hydroxide, gypsum, novaculite, dawsonite, and a plate-like or granular inorganic fillers of clay or the like.

  Organic fillers include synthetic fibers such as polyester fiber, nylon fiber, acrylic fiber, regenerated cellulose fiber, and acetate fiber, and natural fibers such as kenaf, ramie, cotton, jute, hemp, sisal, Manila hemp, flax, linen, silk, and wool. Examples thereof include fibrous organic fillers obtained from microcrystalline cellulose, sugar cane, wood pulp, paper waste, waste paper and the like, and granular organic fillers such as organic pigments.

  When the molding material contains a filler, the content is not limited, but is usually 30% by mass or less, preferably 5 to 10% by mass with respect to the molding material.

The molding material of the present invention may contain a flame retardant. Thereby, the flame retarding effect such as reduction or suppression of the burning rate can be improved.
The flame retardant is not particularly limited, and a conventional flame retardant can be used. For example, brominated flame retardants, chlorine-based flame retardants, phosphorus-containing flame retardants, silicon-containing flame retardants, nitrogen compound-based flame retardants, inorganic flame retardants and the like can be mentioned. Among these, hydrogen halides are not generated by thermal decomposition during resin compounding or molding, and do not corrode processing machines or molds or deteriorate the working environment. Phosphorus-containing flame retardants and silicon-containing flame retardants are preferred because they are less likely to adversely affect the environment through the generation of harmful substances such as dioxins when they are diffused or decomposed.

  The phosphorus-containing flame retardant is not particularly limited, and a commonly used one can be used. Examples thereof include organic phosphorus compounds such as phosphate esters, condensed phosphate esters, and polyphosphates.

  Specific 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, diethyl phenylphosphonate be able to.

  Examples of phosphoric acid condensed esters include resorcinol polyphenyl phosphate, resorcinol poly (di-2,6-xylyl) phosphate, bisphenol A polycresyl phosphate, hydroquinone poly (2,6-xylyl) phosphate, and condensates thereof. Aromatic phosphoric acid condensed ester and the like.

  Moreover, the polyphosphate which consists of a salt of phosphoric acid, polyphosphoric acid, a periodic table group 1-14 group metal, ammonia, an aliphatic amine, and an aromatic amine can also be mentioned. As typical salts of polyphosphates, lithium salts, sodium salts, calcium salts, barium salts, iron (II) salts, iron (III) salts, aluminum salts and the like as metal salts, methylamine salts as aliphatic amine salts, Examples include ethylamine salts, diethylamine salts, triethylamine salts, ethylenediamine salts, piperazine salts, and examples of aromatic amine salts include pyridine salts and triazines.

In addition to the above, halogen-containing phosphate esters such as trischloroethyl phosphate, trisdichloropropyl phosphate, tris (β-chloropropyl) phosphate), and structures in which a phosphorus atom and a nitrogen atom are connected by a double bond Phosphazene compounds having phosphoric acid and phosphoric ester amides.
These phosphorus-containing flame retardants may be used singly or in combination of two or more.

  Examples of the silicon-containing flame retardant include an organic silicon compound having a two-dimensional or three-dimensional structure, polydimethylsiloxane, or a methyl group at a side chain or a terminal of polydimethylsiloxane, a hydrogen atom, a substituted or unsubstituted aliphatic hydrocarbon group, Examples thereof include those substituted or modified with an aromatic hydrocarbon group, so-called silicone oils, or modified silicone oils.

Examples of the substituted or unsubstituted aliphatic hydrocarbon group and aromatic hydrocarbon group include an alkyl group, a cycloalkyl group, a phenyl group, a benzyl group, an amino group, an epoxy group, a polyether group, a carboxyl group, a mercapto group, Examples include a chloroalkyl group, an alkyl higher alcohol ester group, an alcohol group, an aralkyl group, a vinyl group, or a trifluoromethyl group.
These silicon-containing flame retardants may be used alone or in combination of two or more.

  Examples of the flame retardant other than the phosphorus-containing flame retardant or the silicon-containing flame retardant include, for example, magnesium hydroxide, aluminum hydroxide, antimony trioxide, antimony pentoxide, sodium antimonate, zinc hydroxystannate, zinc stannate, Metastannic acid, tin oxide, tin oxide salt, zinc sulfate, zinc oxide, ferrous oxide, ferric oxide, stannous oxide, stannic oxide, zinc borate, ammonium borate, ammonium octamolybdate, tungsten Inorganic flame retardants such as acid metal salts, complex oxides of tungsten and metalloid, ammonium sulfamate, ammonium bromide, zirconium compounds, guanidine compounds, fluorine compounds, graphite, and swellable graphite can be used. . These other flame retardants may be used alone or in combination of two or more.

  When the molding material of the present invention contains a flame retardant, its content is not limited, but is usually 30% by mass or less, preferably 2 to 10% by mass with respect to the molding material. By setting it as this range, impact resistance, brittleness, etc. can be improved, or generation | occurrence | production of pellet blocking can be suppressed.

The molding material of the present invention may contain other components other than those described above for the purpose of further improving various properties such as moldability and flame retardancy within the range not impairing the object of the present invention. .
Examples of other components include polymers other than the cellulose derivatives, plasticizers, stabilizers (ultraviolet absorbers, etc.), antistatic agents, flame retardant aids, processing aids, anti-drip agents, antibacterial agents, and antifungal agents. Etc. Further, a coloring agent containing a dye or a pigment can be added.

As the polymer other than the cellulose derivative, either a thermoplastic polymer or a thermosetting polymer can be used, but a thermoplastic polymer is preferable from the viewpoint of moldability. Specific examples of polymers other than cellulose derivatives include low density polyethylene, linear low density polyethylene, high density polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-propylene-nonconjugated diene copolymer, ethylene-butene- 1 copolymer, polypropylene homopolymer, polypropylene copolymer (such as ethylene-propylene block copolymer), polyolefin such as polybutene-1 and poly-4-methylpentene-1, polybutylene terephthalate, polyethylene terephthalate and other aromatic polyesters, etc. Polyamide such as polyester, nylon 6, nylon 46, nylon 66, nylon 610, nylon 612, nylon 6T, nylon 12, etc., polystyrene, high impact polystyrene, polyacetate (Including homopolymers and copolymers), polyurethanes, aromatic and aliphatic polyketones, polyphenylene sulfide, polyetheretherketone, thermoplastic starch resins, polymethyl methacrylate and methacrylate-acrylate copolymers Acrylic resin, AS resin (acrylonitrile-styrene copolymer), ABS resin, AES resin (ethylene rubber reinforced AS resin), ACS resin (chlorinated polyethylene reinforced AS resin), ASA resin (acrylic rubber reinforced AS resin) ), Polyvinyl chloride, polyvinylidene chloride, vinyl ester resin, maleic anhydride-styrene copolymer, MS resin (methyl methacrylate-styrene copolymer), polycarbonate, polyarylate, polysulfone, polyethersulfone, phenoxy resin Thermoplastic polyimide such as polyphenylene ether, modified polyphenylene ether, polyetherimide, polytetrafluoroethylene, tetrafluoroethylene-hexafluoropropylene copolymer, tetrafluoroethylene-ethylene copolymer, tetrafluoroethylene-perfluoroalkyl vinyl ether Fluoropolymers such as polymers, polychlorotrifluoroethylene, polyvinylidene fluoride, tetrafluoroethylene-hexafluoropropylene-perfluoroalkyl vinyl ether copolymer, cellulose acetate, polyvinyl alcohol, unsaturated polyester, melamine resin, phenol resin, A urea resin, a polyimide, etc. can be mentioned.
In addition, various acrylic rubbers, ethylene-vinyl acetate copolymers, ethylene-acrylic acid copolymers and alkali metal salts thereof (so-called ionomers), ethylene-acrylic acid alkyl ester copolymers (for example, ethylene-ethyl acrylate copolymer) Copolymer, ethylene-butyl acrylate copolymer), diene rubber (for example, 1,4-polybutadiene, 1,2-polybutadiene, polyisoprene, polychloroprene), copolymer of diene and vinyl monomer (for example, Styrene-butadiene random copolymer, styrene-butadiene block copolymer, styrene-butadiene-styrene block copolymer, styrene-isoprene random copolymer, styrene-isoprene block copolymer, styrene-isoprene-styrene block copolymer Polymer, polybutadiene Styrene-grafted styrene, butadiene-acrylonitrile copolymer), polyisobutylene, copolymer of isobutylene and butadiene or isoprene, butyl rubber, natural rubber, thiocol rubber, polysulfide rubber, acrylic rubber, nitrile rubber, poly Examples include ether rubber, epichlorohydrin rubber, fluoro rubber, silicone rubber, and other thermoplastic elastomers such as polyurethane, polyester, and polyamide.

Furthermore, those having various degrees of crosslinking, those having various microstructures such as cis structure and trans structure, those having vinyl groups, those having various average particle diameters, core layers and the like A multi-layer structure polymer called a so-called core-shell rubber, which is composed of one or more shell layers to be covered and whose adjacent layers are composed of different types of polymers, can also be used, and further a core-shell rubber containing a silicone compound Can also be used.
These polymers may be used alone or in combination of two or more.

  When the molding material of this invention contains polymers other than a cellulose derivative, the content is 30 mass% or less with respect to a molding material, and 2-10 mass% is more preferable.

A coloring agent can also be added to the molding material of the present invention.
Examples of the colorant include known pigments and dyes. Preferred organic pigments include monoazo and condensed azo, anthraquinone, isoindolinone, heterocyclic, perinone, quinacridone, and perylene. Type, thioindigo type, dioxazine type and the like. Examples of the inorganic pigment include carbon black, titanium oxide, titanium yellow, iron oxide, ultramarine blue, cobalt blue, a fired pigment, and a metallic pigment.
Here, as the carbon black, channel black, furnace black, lamp black, thermal black, ketjen black, naphthalene black and the like are preferably used. These carbon blacks may be used alone or in combination of two or more. Moreover, you may use together with another coloring agent. Metallic pigments include aluminum, colored aluminum, nickel, tin, copper, gold, silver, platinum, iron oxide, stainless steel, titanium, and other metal particles, mica pearl pigment, color graphite, color glass fiber, color glass flake, etc. Can be mentioned.

  The molding material of the present invention may contain a plasticizer. Thereby, a flame retardance and a moldability can be improved further. As the plasticizer, those commonly used for polymer molding can be used. Examples thereof include polyester plasticizers, glycerin plasticizers, polycarboxylic acid ester plasticizers, polyalkylene glycol plasticizers, and epoxy plasticizers.

  Specific examples of the polyester plasticizer include acid components such as adipic acid, sebacic acid, terephthalic acid, isophthalic acid, naphthalenedicarboxylic acid, diphenyldicarboxylic acid, rosin, propylene glycol, 1,3-butanediol, 1,4 -Polyesters composed of diol components such as butanediol, 1,6-hexanediol, ethylene glycol and diethylene glycol, and polyesters composed of hydroxycarboxylic acids such as polycaprolactone. These polyesters may be end-capped with a monofunctional carboxylic acid or monofunctional alcohol, or may be end-capped with an epoxy compound or the like.

  Specific examples of the glycerin plasticizer include glycerin monoacetomonolaurate, glycerin diacetomonolaurate, glycerin monoacetomonostearate, glycerin diacetomonooleate, and glycerin monoacetomonomontanate.

  Specific examples of polycarboxylic acid plasticizers include phthalates such as dimethyl phthalate, diethyl phthalate, dibutyl phthalate, dioctyl phthalate, diheptyl phthalate, dibenzyl phthalate, butyl benzyl phthalate, and trimellitic acid. Trimellitic acid esters such as tributyl, trioctyl trimellitic acid, trihexyl trimellitic acid, diisodecyl adipate, n-octyl-n-decyl adipate, methyl diglycol butyl diglycol adipate, benzyl methyl diglycol adipate, adipic acid Adipic acid esters such as benzylbutyl diglycol, citrate esters such as triethyl acetylcitrate and tributyl acetylcitrate, azelaic acid esters such as di-2-ethylhexyl azelate, sebacin Dibutyl, and include di-2-ethylhexyl sebacate and the like.

  Specific examples of the polyalkylene glycol plasticizer include polyethylene glycol, polypropylene glycol, poly (ethylene oxide / propylene oxide) block and / or random copolymer, polytetramethylene glycol, ethylene oxide addition polymer of bisphenols, and bisphenols. And a polyalkylene glycol such as a propylene oxide addition polymer, a tetrahydrofuran addition polymer of bisphenol, or a terminal epoxy-modified compound thereof, a terminal ester-modified compound, a terminal ether-modified compound, and the like.

  The epoxy plasticizer generally refers to an epoxy triglyceride composed of an alkyl epoxy stearate and soybean oil, but there are also so-called epoxy resins mainly made of bisphenol A and epichlorohydrin. Can be used.

  Specific examples of other plasticizers include benzoic acid esters of aliphatic polyols such as neopentyl glycol dibenzoate, diethylene glycol dibenzoate, triethylene glycol di-2-ethylbutyrate, fatty acid amides such as stearamide, oleic acid Examples thereof include aliphatic carboxylic acid esters such as butyl, oxy acid esters such as methyl acetylricinoleate and butyl acetylricinoleate, pentaerythritol, and various sorbitols.

  When the molding material of this invention contains a plasticizer, the content is 5 mass parts or less normally with respect to 100 mass parts of cellulose derivatives, 0.005-5 mass parts is preferable, More preferably, 0.01 -1 part by mass.

The molded body of the present invention can be obtained by molding a molding material containing the cellulose derivative and the polyether compound. More specifically, the cellulose derivative or the cellulose derivative and, if necessary, a molding material containing various additives and the like are heated and obtained by a production method including a step of molding by various molding methods.
The method for producing a molded body of the present invention includes a step of heating and molding the molding material.
Examples of the molding method include injection molding, extrusion molding, blow molding and the like.
The heating temperature is usually 160 to 300 ° C, preferably 180 to 260 ° C.

  The use of the molded product of the present invention is not particularly limited. For example, interior or exterior parts of electrical and electronic equipment (home appliances, OA / media related equipment, optical equipment, communication equipment, etc.), automobiles, mechanical parts, etc. And materials for housing and construction. Among these, from the viewpoint of having excellent heat resistance and impact resistance and low environmental impact, for example, exterior parts (especially casings) for electrical and electronic equipment such as copiers, printers, personal computers, and televisions. ) Can be suitably used. That is, the housing for electrical and electronic equipment of the present invention is composed of the molded body of the present invention.

  EXAMPLES The present invention will be specifically described below with reference to examples and comparative examples, but the scope of the present invention is not limited to the examples shown below.

(Synthesis Example 1)
<Synthesis Example 1: Synthesis of acetoxypropylmethylacetylcellulose (C-1)>
Weigh 60 g of hydroxypropylmethylcellulose (trade name Metrolose 90SH-100; manufactured by Shin-Etsu Chemical Co., Ltd.) and 2100 mL of N, N-dimethylacetamide in a 5 L three-necked flask equipped with a mechanical stirrer, thermometer, condenser and dropping funnel, and stir at room temperature. did. After confirming that the reaction system became transparent and completely dissolved, 101 mL of acetyl chloride was slowly added dropwise to raise the temperature of the system to 80 to 90 ° C. After stirring for 3 hours, the temperature of the reaction system was cooled to room temperature. When the reaction solution was added to 10 L of water with vigorous stirring, a white solid was precipitated. The white solid was filtered off by suction filtration and washed with a large amount of water three times. The obtained white solid was vacuum-dried at 100 ° C. for 6 hours to obtain the objective cellulose derivative (C-1) (acetoxypropylmethylacetylcellulose) as a white powder. The solubility of this cellulose derivative (C-1) in water at 25 ° C. was less than 0.1% by mass (insoluble).

<Synthesis Examples 2, 3, and 4: Synthesis of acetoxyethyl methyl acetyl cellulose (C-2), methyl acetyl cellulose (C-3), and ethyl acetyl cellulose (C-4)>
Hydroxypropyl methylcellulose (trade name Metrolose 90SH-100; manufactured by Shin-Etsu Chemical Co., Ltd.) in Synthesis Example 1 was replaced with hydroxyethyl methylcellulose (trade name Marporose ME-250T; manufactured by Matsumoto Yushi), methylcellulose (trade name Marporose M-4000: Matsumoto Yushi Co., Ltd.) Acetoxyethyl methyl acetyl cellulose (C-2), methyl acetyl cellulose (C-3), ethyl acetyl cellulose (C-3), and ethyl cellulose (trade name Etcel 300CP: manufactured by Dow Chemical). C-4) was obtained. All of the cellulose derivatives (C-2), (C-3), and (C-4) had a solubility in water at 25 ° C. of less than 0.1% by mass (insoluble).

<Synthesis Example 5: Synthesis of methylcellulose-2-ethylhexanoate (C-5)>
In a 3 L three-necked flask equipped with a mechanical stirrer, thermometer, condenser, and dropping funnel, 80 g of methylcellulose (manufactured by Wako Pure Chemical Industries, Ltd .: methyl substitution degree 1.8) and 1500 mL of pyridine were weighed and stirred at room temperature. 173 mL of 2-ethylhexanoyl chloride was dripped slowly under water cooling here, and also it stirred at 60 degreeC for 6 hours. After the reaction, the reaction solution was returned to room temperature and quenched by adding 200 mL of methanol under ice cooling. When the reaction solution was added to 12 L of water with vigorous stirring, a white solid was precipitated. The white solid was filtered off by suction filtration and washed 3 times with a large amount of methanol solvent. The obtained white solid was vacuum-dried at 100 ° C. for 6 hours to obtain methylcellulose-2-ethylhexanoate (C-5). The solubility of this cellulose derivative (C-5) in water at 25 ° C. was less than 0.1% by mass (insoluble).

<Synthesis Example 6: Synthesis of valeroxypropylmethyl valeroyl cellulose (C-6)>
Instead of methyl cellulose in Synthesis Example 5 (manufactured by Wako Pure Chemical Industries, Ltd .: methyl substitution degree 1.8), valeroyl was changed to hydroxypropyl methylcellulose (trade name Metroze 90SH-100; manufactured by Shin-Etsu Chemical Co., Ltd.) and 2-ethylhexanoyl chloride. Valeroxypropyl valeroyl cellulose (C-6) was obtained in the same manner as in Synthesis Example 5 except that chloride was used. The solubility of this cellulose derivative (C-6) in water at 25 ° C. was less than 0.1% by mass (insoluble).

<Synthesis Example 7: Synthesis of valeroxybutyl methyl valeroyl cellulose (C-7)>
Valeroxybutylmethylvaleroylcellulose (C-7) was obtained in the same manner as in Synthesis Example 6 except that hydroxybutylmethylcellulose was used as the hydroxypropylmethylcellulose (trade name Metroze 90SH-100; manufactured by Shin-Etsu Chemical) in Synthesis Example 6. . The solubility of this cellulose derivative (C-7) in water at 25 ° C. was less than 0.1% by mass (insoluble).

In addition, the kind and substitution degree of the hydrocarbon group, the kind and molar substitution degree of the alkyleneoxy group, the kind of acyl group, and the acylation degree of the cellulose derivative obtained above are described in Cellulose Communication 6, 73-79 (1999). Were observed and determined by 1H-NMR. The degree of substitution of the hydrocarbon group is the number of moles of the hydrocarbon group substituted on the glucose ring unit, and takes a value of 0 or more and less than 3. The molar substitution degree of the alkyleneoxy group is the number of moles of the alkyleneoxy group substituted on the glucose ring unit, and takes a value of 0 or more. The degree of acylation indicates the degree of substitution with an acyl group by esterifying a hydroxyl group present in the glucose ring or ether substituent of cellulose, and is represented by 0 or more and 100 or less. In addition, since there is almost no difference between the reactivity of the acyl group with respect to the hydroxyl group of the glucose ring of cellulose and the reactivity of the acyl group with respect to the hydroxyl group derived from the alkyleneoxy group, C) of the group containing an alkyleneoxy group and an acyl group The molar substitution degree can be determined by multiplying the alkylene oxygen group molar substitution degree and the acylation degree.
Further, the colloid titration method is performed, and the degree of substitution of the carboxyl group or sulfonic acid group in the cellulose derivatives (C-1) to (C-7) is less than 0.02 (that is, the content of the carboxyl group or sulfonic acid group is It was confirmed that it was less than 0.5% by mass with respect to the cellulose derivative.

<Measurement of molecular weight of cellulose derivative>
About the obtained cellulose derivative, the number average molecular weight (Mn) and the mass average molecular weight (Mw) were measured. These measuring methods are as follows.
[Molecular weight and molecular weight distribution]
For the measurement of the number average molecular weight (Mn) and the mass average molecular weight (Mw), gel permeation chromatography (GPC) was used. Specifically, N-methylpyrrolidone was used as a solvent, a polystyrene gel was used, and the molecular weight was determined using a conversion molecular weight calibration curve obtained in advance from a constituent curve of standard monodisperse polystyrene. As the GPC apparatus, HLC-8220 GPC (manufactured by Tosoh Corporation) was used.

  The type and degree of substitution of hydrocarbon groups, the type and molar substitution of alkyleneoxy groups, the type and degree of acylation of acyl groups, the number average molecular weight (Mn), and the mass average molecular weight (Mw) of the obtained cellulose derivative These are summarized in Table 1. Table 1 also shows the cellulose ester resin (H-1) used in the comparative example.

[Production of molded body]
A cellulose derivative (C-1 to C-7, H-1), a polyether compound (P-1 to P-11), and a plasticizer (S-1) are added in parts by mass shown in Table 2 below. After adding 0.5 parts by mass of an antioxidant (“Irganox 1010” manufactured by Ciba Specialty Chemicals), the mixture was mixed with a Henschel mixer to prepare a mixture for molding material. This mixture was supplied to a twin-screw kneading extruder (manufactured by Technobel Co., Ltd., Ultrano) set at a barrel temperature of 210 ° C. to produce pellets. Subsequently, the obtained pellets were supplied to a small injection molding machine (FANUC ROBOSHOT S-2000i, automatic injection molding machine), and a multipurpose test piece (bending test piece, width 4 mm × length 10 mm × thickness 80 mm) HDT test piece) and a plate-like test piece of width 8 cm × length 5 cm × thickness 2 mm were molded.

In Table 2, the polyether compounds are as follows.
[Polyether compounds]
(P-1) Polyethylene glycol (mass average molecular weight 500,000, “Alcox E-30” manufactured by Meisei Chemical Co., Ltd.)
(P-2) Polyethylene glycol (mass average molecular weight 2,000, reagent manufactured by Wako Pure Chemical Industries, Ltd.)
(P-3) Polyethylene glycol (mass average molecular weight 20,000, reagent manufactured by Wako Pure Chemical Industries, Ltd.)
(P-4) Polyethylene glycol (mass average molecular weight 200,000, “Alcox R-400” manufactured by Meisei Chemical Co., Ltd.)
(P-5) Polyethylene glycol (mass average molecular weight 2,000,000, “Alcox E-75” manufactured by Meisei Chemical Co., Ltd.)
(P-6) Polyethylene glycol (mass average molecular weight 3,500,000, “Alcox E-130” manufactured by Meisei Chemical Co., Ltd.)
(P-7) ethylene glycol-1,2-propylene glycol copolymer (molar ratio 90/10, mass average molecular weight 1,000,000, “Alcox EP-10” manufactured by Meisei Chemical Industry Co., Ltd.)
(P-8) Polyepichlorohydrin (mass average molecular weight 350,000, manufactured by Zeon Corporation)
(P-9) Polyethylene glycol bis (2-ethylhexanoate) (mass average molecular weight 2,000, reagent manufactured by Aldrich)
(P-10) Polyethylene glycol dimethyl ether (mass average molecular weight 2,000, reagent manufactured by Aldrich)
(P-11) Poly 1,3-propylene glycol (mass average molecular weight 2,000, reagent manufactured by Aldrich)
Moreover, the following was prepared as a plasticizer used as a comparison.
(S-1) Adipic acid-ethylene glycol copolymer (mass average molecular weight 550, “Adeka Sizer RS-1000” manufactured by Adeka)

[Evaluation]
The following items were evaluated using the obtained multipurpose test pieces and plate-like test pieces. The evaluation results are shown in Table 2.
In Table 2, Examples 8 and 15 to 17 shall be read as Reference Examples 8 and 15 to 17, respectively.

(Falling ball impact test)
According to JIS K7211-1, both ends of the plate-shaped test piece (1 cm each in width 8 cm) are fixed, and a 500 g steel ball is dropped from a predetermined height onto the center of the test piece using a cylindrical guide. Then, it was observed whether or not a crack penetrated the test piece. A test was performed on a plurality of test pieces, and the height when the probability that a crack penetrates the test piece was 50% was obtained. The fracture energy (unit J) was determined from the results and shown in Table 2. The test was conducted at 23 ° C.

(Flexural modulus)
In accordance with ISO178, after preparing a test piece molded by injection molding at 23 ° C. ± 2 ° C. and 50% ± 5% RH for 48 hours or more, the distance between fulcrums by Instron (Toyo Seiki, Strograph V50) The measurement was performed at 64 mm and a test speed of 2 mm / min. The measurement is an average of three measurements. The results are shown in Table 2. In addition, that a bending elastic modulus is 1 GPa or more means that a molding material can be used practically satisfactorily.

(Deflection temperature under load: HDT)
Based on the method of ISO75-1,2, the test piece shape | molded by injection molding was measured by the 1.8 MPa load. The results are shown in Table 2.

(Melt volume rate)
In conformity with JIS K-7210, using a Techno Seven Co. L251-11 type MFR measuring instrument, 220 ° C., indicated by the amount of polymer flowing out to 10 minutes under a load of 10 kg (cm ^3). The results are shown in Table 2.

  From Table 2, the molded body formed from the molding material of the example has better falling ball impact strength, flexural modulus, deflection temperature under load (HDT), fluidity and moldability (melt volume) than the comparative example. It can be seen that the rate is excellent.

Claims (17)

The hydrogen atom of the hydroxyl group contained in cellulose
A cellulose derivative comprising at least one group substituted in A) below and at least one group substituted in B) below;
It contains at least one of the repeating unit represented by the following general formula (p1) and the repeating unit represented by the following general formula (p2), and at least one terminal group has the following general formula (p1-1), (p1 -2), a molding material containing a polyether compound which is a group represented by (p2-1) or (p2-2) ,
The compounding amount of the polyether compound in the molding material is 1 to 50% by mass,
A molding material in which the polyether compound has a mass average molecular weight of 10,000 to 10,000,000 .
A) an alkyl group having 1 to 4 carbon atoms : -R _A
B) Acyl group: —CO—R _B (R _B represents an alkyl group having 1 to 12 carbon atoms or an aryl group .)
_{-CH 2 CH (R p) O-} ··· (p1)
_{- (CH 2) p O- ···} (p2)
[In the general formulas (p1) and (p2), R _p represents an alkyl group having 1 to 6 carbon atoms, an alkoxyl group having 1 to 6 carbon atoms, or a halogen atom. The alkyl group may have a halogen atom or an allyloxy group as a substituent. p represents an integer of 2 to 5. ]
—CH ₂ CH (R _p ) O—R _m1 (p1-1)
R _m2 —CH ₂ CH (R _p ) O— (p1-2)
_{- (CH 2) p O-} R m1 ··· (p2-1)
_{R m2 - (CH 2) p} O- ··· (p2-2)
[In the general formulas (p1-1), (p1-2), (p2-1), and (p2-2), R _p represents an alkyl group having 1 to 6 carbon atoms, an alkoxyl group having 1 to 6 carbon atoms, or Represents a halogen atom. The alkyl group may have a halogen atom or an allyloxy group as a substituent. p represents an integer of 2 to 5. R _m1 represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms. R _m2 represents a hydrogen atom, an alkoxyl group having 1 to 20 carbon atoms, a hydroxyl group, or an acyloxy group having 2 to 20 carbon atoms. ] The polyether compound has a repeating unit represented by the general formula (p2), one terminal group is represented by the general formula (p2-1), R _m1 is a hydrogen atom, and the other terminal group is represented by the general formula _{(p2-2), R m2} is a hydroxyl group, the molding material of claim 1. The molding material according to claim 1 or 2, wherein the cellulose derivative further comprises at least one group in which a hydrogen atom of a hydroxyl group contained in cellulose is substituted by the following C).
C) a group containing an alkyleneoxy group: —R _C2 —O— and an acyl group: —CO—R _C1 (R _C1 represents a hydrocarbon group, and R _C2 represents an alkylene group having 2 to 4 carbon atoms. ) The molding material according to claim 3, wherein the C) group containing an alkyleneoxy group and an acyl group is a group represented by the following general formula (3).

(Wherein R _C1 represents a hydrocarbon group, R _C2 represents an alkylene group having 2 to 4 carbon atoms, and n represents an integer of 1 or more.)   The molding material of Claim 3 or 4 whose molar substitution degree MS of the said alkyleneoxy group is 0 <MS <= 1.5.   A) the alkyl group having 1 to 4 carbon atoms: -R _A Degree of substitution DS _A However, 1.0 <DS _A The molding material according to claim 1, wherein ≦ 2.5. Wherein R _A is a methyl group or an ethyl group, molding material according to any one of claims 1-6. Wherein R _{C 1} is an alkyl group or an aryl group, the molding material according to any one of claims 3-5. The molding material according to any one of claims 3 to 8 , wherein R _B and R _C1 are each independently a methyl group, an ethyl group, or a propyl group. The molding material according to any one of claims 1 to 8 , wherein R _B is an alkyl group having a branched structure having 3 to 10 carbon atoms. The molding material according to any one of claims 3 to 5 and 8 , wherein the alkyleneoxy group is a group represented by the following formula (1) or (2).

The molding material according to any one of claims 1 to 11 , wherein the cellulose derivative is substantially free of carboxyl groups, sulfonic acid groups, and salts thereof. The molding material according to any one of claims 1 to 12 , wherein the cellulose derivative is insoluble in water. The molding material according to any one of claims 1 to 13 , wherein the polyether compound is at least one selected from polyethylene glycol and an ethylene glycol / propylene glycol copolymer.   The molded object obtained by shape | molding the molding material of any one of Claims 1-14.   The manufacturing method of a molded object including the process of heating and shape | molding the molding material of any one of Claims 1-14.   A housing for electrical and electronic equipment comprising the molded body according to claim 15.