WO2011078285A1 - Molding material, molded article and process for production thereof, and housing for electric/electronic device - Google Patents

Abstract

Disclosed is a molding material which has good thermoplasticity, moldability, impact resistance and draw-down properties in profile extrusion molding and which enables the production of a molded product having good appearance when subjected to profile extrusion molding. The molding material comprises: a cellulose derivative which contains at least one group that is produced by substituting a hydrogen atom in a hydroxy group contained in a cellulose by a group (A) and at least one group that is produced by substituting a hydrogen atom in a hydroxy group contained in the cellulose by a group (B); and a lubricant. (A) A hydrocarbon group: -R_A. (B) An acyl group: -CO-R_B (wherein R_B represents a hydrocarbon group).

Description

MOLDING MATERIAL, MOLDED BODY, ITS MANUFACTURING METHOD, AND ELECTRIC ELECTRONIC DEVICE CASE

The present invention relates to a molding material, a molded body, a manufacturing method thereof, and a casing for electrical 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, it is known to improve processability by adding a lubricant to a thermoplastic resin. For example, lubricants such as soap which is a reaction product of alkali and fatty acid, especially alkali stearate soap such as calcium stearate and sodium stearate are generally widely known. Patent Document 5 describes a biodegradable resin molded product obtained by adding a lubricant to a biodegradable cellulose ester. Patent Document 6 describes that a lubricant can be added to a film containing a cellulose derivative.

Japanese Unexamined Patent Publication No. 56-55425 Japanese Unexamined Patent Publication No. 2008-24919 US Pat. No. 3,979,179 U.S. Pat. No. 3,940,384 Japanese Patent Laid-Open No. 2002-294048 Japanese Unexamined Patent Publication No. 2009-11497

The present inventors paid attention for the first time to use 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.

The object of the present invention is to provide excellent thermoplasticity, moldability, impact resistance, and excellent draw-down property of profile extrusion, and to suppress the occurrence of scratches due to friction with the mold during profile extrusion. An object of the present invention is to provide a molding material that is excellent in terms of the appearance of a profile extrusion molded product. 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.

The present inventors paid attention to the molecular structure of cellulose, and made cellulose into a cellulose derivative having a specific structure having an ether structure and an ester structure, and a molding material containing the cellulose derivative having the specific structure and a lubricant, thereby forming thermoplasticity and molding. The present invention has been completed by finding that it exhibits excellent performance from all the viewpoints of performance, impact resistance, profile extrusion drawdown, and profile extrusion molding appearance.
That is, the said subject can be achieved by the following means.
[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;
Molding material containing a lubricant.
A) Hydrocarbon group: —R _A
B) Acyl group: —CO—R _B (R _B represents a hydrocarbon group.)
[2]
The molding material according to [1], 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. )
[3]
[Claim 2] The molding material according to [2], wherein the group containing C) an alkyleneoxy group and an acyl group is a group containing a structure 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.)
[4]
The molding material according to any one of [1] to [3], wherein R _A is an alkyl group having 1 to 4 carbon atoms.
[5]
The molding material according to any one of [1] to [4], wherein R _A is a methyl group or an ethyl group.
[6]
The molding material according to any one of [2] to [5], wherein R _B and R _C1 are each independently an alkyl group or an aryl group.
[7]
The molding material according to any one of [2] to [6], wherein R _B and R _C1 are each independently a methyl group, an ethyl group, or a propyl group.
[8]
The molding material according to any one of [1] to [6], wherein R _B is a hydrocarbon group having a branched structure having 3 to 10 carbon atoms.
[9]
The molding material according to any one of [2] to [8], wherein the alkyleneoxy group is a group represented by the following formula (1) or (2).

[10]
The molding material according to any one of [1] to [9], wherein the cellulose derivative is substantially free of carboxyl groups, sulfonic acid groups, and salts thereof.
[11]
The molding material according to any one of [1] to [10], wherein the cellulose derivative is insoluble in water.
[12]
[1] to [11], wherein the lubricant is at least one selected from ester lubricants, fatty acid lubricants, fatty acid amide lubricants, alcohol lubricants, metal soaps, waxes, and polymer lubricants. The molding material according to one item.
[13]
[1] A molded article obtained by molding the molding material according to any one of [12].
[14]
[1] A method for producing a molded body, comprising a step of heating and molding the molding material according to any one of [12].
[15]
[13] A casing for an electric and electronic device comprising the molded article according to [13].

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, impact resistance, profile extrusion drawdown, and profile extrusion molded product appearance, such as automobiles, It can be suitably used as a component part for home appliances, electrical and electronic equipment, mechanical parts, housing / building materials, and 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;
The present invention relates to a molding material containing a lubricant.
A) Hydrocarbon group: —R _A
B) Acyl group: —CO—R _B (R _B represents a hydrocarbon group.)
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) Substituted by an acyl group: —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 general formula (A), R ² , R ³ and R ⁶ are each independently a hydrogen atom, A) hydrocarbon group: —R _A , B) acyl group: —CO—R _B (R _B is carbon 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 because at least part of the hydroxyl group of the β-glucose ring is etherified and esterified with 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) Any one of R ² , R ³ and R ⁶ of one repeating unit is substituted with A) a hydrocarbon group, and any other one is substituted with B) an acyl group (ie, A cellulose derivative composed of the same type of repeating unit having the substituents of 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 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. In the case where R _A is an aromatic group, the preferred carbon number is 6 to 18, more preferably 6 to 14, and still more preferably 6 to 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) 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, still more preferably an alkyl group having 1 to 12 carbon atoms, and particularly preferably an alkyl group having 1 to 4 carbon atoms (preferably a methyl group). Group, ethyl group, propyl group), and most preferably an alkyl group having 1 or 2 carbon atoms (that is, a methyl group or an ethyl group).
Also, R _B, it is also preferably a hydrocarbon group having a branched structure having 3 to 10 carbon atoms, more preferably an alkyl group having a branched structure having 3 to 10 carbon atoms, having 7-9 carbon atoms More preferably, it is an alkyl group having a branched structure.
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, 3-heptyl, 2-ethylhexyl group, tert- butyl Group, isoheptyl group, and the like. Preferably, R _B is a methyl group, an ethyl group, a propyl group, a 3-heptyl group, or a 2-ethylhexyl group, and more preferably a methyl group, an ethyl group, a 3-heptyl group, or a 2-ethylhexyl 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.
The alkyleneoxy group (—R _C2 —O—) is preferably an alkyleneoxy group having 2 or 3 carbon atoms. 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 —R _C2 —O— is branched is preferable because the obtained molding material has excellent bending elastic modulus.

The group of 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, 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 _B and R _C1 are preferably each independently an alkyl group or an aryl group, and R _B and R _C1 are preferably each independently a methyl group, an ethyl group, or a propyl group.
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 preferably has 1 to 5 carbon atoms), alkenyl groups, and the like. However, even when a substituent is included, R _C2 has 2 to 4 carbon atoms. Note that when R _A , R _B , and R _C1 are other than an alkyl group, they may have an alkyl group (preferably having a carbon number of 1 to 5) 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, the cellulose as a raw material may contain a carboxyl group, and the cellulose derivative using the above-described substituents A) to C) introduced therein 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.

In addition, the cellulose derivative in the present invention is preferably 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.

Specific examples of the cellulose derivative in the present invention include 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, propionyloxyethyl butylacetylcellulose, propionyloxyethylpentylacetylcellulose, propionyloxyethylhexylacetylcellulose, propionyloxyethylcyclohexylacetylcellulose, propionyloxy Ethylphenylacetylcellulose, propionyloxyethylnaphthylacetylcellulose,

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

Propionyloxyethyl methylcellulose-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 two or more kinds.

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

For example, A) hydrocarbon group: the degree of substitution DS _{A of} —R _A (the number of _RA for the 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 ) (the 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 such that the number average molecular weight (Mn) is 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 is used as a solvent, a polystyrene gel is used, and the molecular weight can be determined using a conversion molecular weight calibration curve obtained in advance from a standard monodisperse polystyrene constituent curve.

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 a method for producing a cellulose derivative having the above A) hydrocarbon group: —R _A and B) acyl group: —CO—R _B (R _B represents a hydrocarbon group) includes cellulose ether, base It includes a step of esterification by reacting acid chloride or acid anhydride in the presence.
As the cellulose ether, for example, those 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 are substituted with hydrocarbon groups 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 thereof 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 manufacturing conditions can follow the usual method. For example, the method described in “Encyclopedia of Cellulose” pages 131 to 164 (Asakura Shoten, 2000) can be referred to.

3. Lubricant The molding material of the present invention contains a lubricant.
A lubricant has the effect of improving fluidity when molding a molding material by heating and melting, or suppressing the adhesiveness to a molding machine or mold and improving the mold release of a molded product. Refers to a drug. Since the lubricant is present on the surface of the molding material or at the interface with the device, the effect is exhibited. Therefore, when the specific cellulose derivative is used alone by mixing it with the specific cellulose derivative in the present invention. As a result, the moldability can be improved. Furthermore, since the specific cellulose derivative in the present invention includes an ether structure and an ester structure, the polarity is lower than that of a conventional cellulose ester and the like, so that the affinity with a lubricant is excellent. Therefore, the lubricant is excellent in dispersibility with respect to the specific cellulose derivative in the present invention, and both are mixed well, so that the performance such as rigidity, bending strength, and heat resistance is lowered as compared with the case where the specific cellulose derivative is used alone. Therefore, a molding material and a molded body excellent in moldability can be obtained.

The lubricant used in the present invention can be appropriately selected from known lubricants, such as ester lubricants, fatty acid lubricants, fatty acid amide lubricants, alcohol lubricants, fatty acid metal salt lubricants (metal soaps), waxes, Examples thereof include polymer lubricants, nonionic surfactant lubricants, partially saponified montanate esters, and silicone lubricants.
The lubricant is preferably at least one selected from ester lubricants, fatty acid lubricants, fatty acid amide lubricants, alcohol lubricants, metal soaps, waxes, and polymer lubricants.

Examples of ester lubricants include lower alcohol esters of fatty acids, polyhydric alcohol esters of fatty acids, polyglycol esters of fatty acids, fatty alcohol esters of fatty acids, butyl stearate, monoglyceride stearate, pentaerythritol tetrastearate, stearyl. Examples include stearate and ethylene glycol monostearate. Specifically, “Rikemar S-100” (glycerin monostearate) manufactured by Riken Vitamin, “Riquemar S-300W” (sorbitan stearate) manufactured by Riken Vitamin, “Riquemar EW-200” (penta) manufactured by Riken Vitamin. Erythritol adipate stearate polymer ester), “Yunistar H-476” (pentaerythritol tetrastearate) manufactured by Nippon Oil and Fats, “AX-518” (stearyl phosphate ester mixture) manufactured by Daikyo Kasei Kogyo Co., Ltd. .

Fatty acid lubricants include higher fatty acids (preferably having 12 to 35 carbon atoms, specifically caproic acid, stearic acid, oleic acid, erucic acid, palmitic acid, myristic acid, arachidic acid, behenic acid, etc.), oxy fatty acids Etc. Specific examples include “Licowax OP” (Montanic acid wax) manufactured by Clariant, “Lunac S-50V” (stearic acid) manufactured by Kao Corporation, and the like.

Examples of fatty acid amide lubricants include saturated fatty acid amide lubricants, behenic acid amide lubricants, stearic acid amide lubricants, hydroxystearic acid amide lubricants, palmitic acid amide lubricants, and lauric acid amide lubricants. Examples of unsaturated fatty acid amide lubricants include erucic acid amide lubricants, oleic acid amide lubricants, and the like. As a bis-fatty acid amide lubricant, a methylene bisbehenic acid amide lubricant, a methylene bis stearic acid amide lubricant, a methylene bis oleic acid amide lubricant, an ethylene bis stearamide amide lubricant, a hexamethylene bis stearamide amide lubricant, Hexamethylenebisoleic acid amide lubricant, monoalkylolamide lubricant, N- (2-hydroxyethyl) lauric acid amide, N- (2-hydroxyethyl) stearic acid amide, N- (2-hydroxymethyl) stearin Examples include acid amides. Specifically, “Light Amide WH255” (carboxylic acid amide wax) manufactured by Kyoeisha Yushi Chemical Co., Ltd., “Fatty Acid Amide S” (stearic acid amide) manufactured by Kao Corporation, “Fatty Acid Amide ON” manufactured by Kao Corporation ( Oleic acid amide), “Fatty Acid Amide E” (erucic acid amide) manufactured by Kao Corporation, “Kaohax EB-P” (ethylene bis stearic acid amide) manufactured by Kao Corporation, and the like.

Examples of the alcohol-based lubricant include polyhydric alcohol, polyglycol, polyglycerol and the like, and cetyl alcohol, stearyl alcohol, oleyl alcohol, mannitol and the like are exemplified. Specific examples include “Calcoal 8098” (stearyl alcohol) manufactured by Kao Corporation.

Fatty acid metal salt lubricants (metal soaps) include lauric acid, stearic acid, succinic acid, stearyl lactic acid, lactic acid, phthalic acid, benzoic acid, hydroxystearic acid, ricinoleic acid, naphthenic acid, oleic acid, palmitic acid, erucic acid And compounds of higher fatty acids such as Li, Na, Mg, Ca, Sr, Ba, Zn, Cd, Al, Sn, Pb, Cd, etc., and preferred are magnesium stearate, calcium stearate, stearin Examples thereof include sodium acid, zinc stearate, calcium oleate, zinc oleate, and magnesium oleate. Specifically, Mg stearate (reagent manufactured by Wako Pure Chemical Industries, Ltd.), zinc stearate (reagent manufactured by Wako Pure Chemical Industries, Ltd.), “SC-100” (calcium stearate) manufactured by Sakai Chemical Industry, manufactured by Nitto Kasei Co., Ltd. “TSVN-2000E” (butyltin malate) and the like.

Examples of waxes include paraffin wax, microcrystalline wax, polyolefin wax (low-polymerization polyethylene wax (number average molecular weight is 10,000 or less, preferably 8,000 or less, particularly preferably 6,000 or less), polypropylene wax (several Natural waxy substances such as petroleum wax, carnauba wax, montan wax, candelilla wax, microcrystalline wax, beeswax, rosin, etc.) having an average molecular weight of 10,000 or less, preferably 8,000 or less, particularly preferably 6,000 or less) Is mentioned. Specifically, “High Wax 420P” (low molecular polyethylene wax) manufactured by Mitsui Chemicals, “AC629A” (oxidized polyethylene wax) manufactured by Allied Signal, “Lubacs 2191” (microcrystalline wax) manufactured by Nippon Seiwa Co., Ltd., etc. Can be mentioned.

Examples of the polymeric lubricant include alkyl acrylate / alkyl methacrylate / styrene copolymer (number average molecular weight is 3,000 or more, preferably 5,000 to 50,000). Specific examples include “Paraloid K125P” (polymeric lubricant) manufactured by Kureha Chemical Co., Ltd., “Metablene L-1000” (acrylic polymer) manufactured by Mitsubishi Rayon Co., Ltd., and the like.

Examples of nonionic surfactant-based lubricants include electro stripper TS-2, electro stripper TS-3 (Kao soap), and the like.

Examples of silicone lubricants include dimethylpolysiloxane and modified products thereof, carboxyl-modified silicone, α-methylstyrene-modified silicone, α-olefin-modified silicone, polyether-modified silicone, fluorine-modified silicone, hydrophilic special-modified silicone, olefin polyether-modified silicone, Examples include epoxy-modified silicone, amino-modified silicone, amide-modified silicone, and alcohol-modified silicone.

As the lubricant used in the present invention, the resulting molding material has good Charpy impact strength and drawdown, and the die line of the molded product is good. Therefore, ester lubricant, fatty acid lubricant, fatty acid amide lubricant, alcohol lubricant, metal Soaps, waxes, and polymeric lubricants are preferred, and ester lubricants, fatty acid amide lubricants, and metal soaps are more preferred because the properties of these molding materials are particularly well balanced.

The molecular weight of the lubricant used in the present invention can be appropriately selected from the miscibility with the cellulose derivative in the case of a low molecular lubricant. 250 to 2,000 is preferable, and 300 to 1,000 is more preferable.
If the molecular weight is 250 or more, it is excellent in miscibility with the cellulose derivative and has excellent dispersibility, so that the deterioration of impact resistance, moldability, rigidity, bending strength, heat resistance, etc. possessed by the specific cellulose derivative is suppressed, and profile extrusion molding Thus, an excellent molding material and molded article can be obtained from all the viewpoints of the drawdown property and the appearance of the profile extrusion molded product. Moreover, if it is 2,000 or less, since the improvement effect of the moldability as a lubricant is large, it is preferable.

4). Molding Material and Molded Body The molding material of the present invention contains the cellulose derivative and the lubricant 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. The cellulose derivative is preferably contained in an amount of 50% by mass or more, more preferably 70% by mass or more, still more preferably 80% by mass or more, and particularly preferably 95 to 99.5% by mass.
The content of the lubricant contained in the molding material of the present invention is preferably 0.1 to 10% by mass, more preferably 0.5 to 5% by mass.
The ratio of the cellulose derivative and the lubricant is preferably from 0.1 to 10% by mass, particularly preferably from 0.5 to 5% by mass, based on the total mass of both.

The molding material of the present invention may contain various additives such as an antioxidant, a filler (reinforcing material), and a flame retardant as required, in addition to the cellulose derivative and the lubricant.

5. Antioxidant 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-to Scan (3,5-di -t- butyl-4-hydroxybenzyl) benzene, and the like.

Phosphorous 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 6,6-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-naphthy Ruamine, 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 sulfur antioxidants 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 antioxidant.

When the molding material of the present invention contains an antioxidant, the content thereof is not limited, but is preferably 0.01 to 5% by mass, more preferably 0.1 to 3% by mass in 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 in 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 -2-acryloyloxyethyl phosphate, diphenyl-2-methacryloyloxyethyl phosphate, melamine phosphate, dimelamine phosphate, melamine pyrophosphate, triphenylphosphine oxide, tricresylphosphine oxide, diphenyl methanephosphonate, diethyl phenylphosphonate Can be mentioned.

Examples of the phosphoric acid condensed ester 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.

In addition, polyphosphates composed of salts of phosphoric acid, polyphosphoric acid and metals of Groups 1 to 14 of the periodic table, ammonia, aliphatic amines, and aromatic amines 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 in 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), polyolefins 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, polyether ether ketone, 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 copolymers, cellulose acetate, polyvinyl alcohol, unsaturated polyesters, melamine resins, phenol resins, A urea resin, a polyimide, etc. can be mentioned.
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 the present invention contains a polymer other than a cellulose derivative, the content thereof is preferably 30% by mass or less, more preferably 2 to 10% by mass in the molding material.

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 pigments, color graphite, color glass fibers, color glass flakes, 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, sebashi 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 benzoate 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 the present invention contains a plasticizer, the content thereof is usually 5 parts by mass or less, preferably 0.005 to 5 parts by mass, more preferably 0.01 to 100 parts by mass of the cellulose derivative. Is 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 lubricant. 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 load, for example, exterior parts for electric and electronic devices such as copiers, printers, personal computers, televisions (especially casings) ) Can be suitably used.

Hereinafter, the present invention will be specifically described 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 of acetoxypropylmethylacetylcellulose (C-1)>
In a 5 L three-necked flask equipped with a mechanical stirrer, thermometer, condenser, and dropping funnel, weigh 60 g of hydroxypropyl methylcellulose (trade name Metroze 90SH-100; manufactured by Shin-Etsu Chemical) and 2100 mL of N, N-dimethylacetamide 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 hydroxyethylmethylcellulose (trade name Marporose ME-250T; manufactured by Matsumoto Yushi), methylcellulose (trade name Marporose M-4000: Matsumoto Yushi Co., Ltd.) And acetoxyethyl methyl acetyl cellulose (C-2), methyl acetyl cellulose (C-3), ethyl acetyl cellulose (C-3) in the same manner as in Synthesis Example 1 except that it was changed to ethyl cellulose (trade name Etcel 300CP: manufactured by Dow Chemical). C-4) was obtained. The solubility of these cellulose derivatives (C-2), (C-3), and (C-4) in water at 25 ° C. was 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. Under water cooling, 173 mL of 2-ethylhexanoyl chloride was slowly added dropwise thereto, and the mixture was further stirred at 60 ° C. 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 resulting 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 valeroxypropyl methyl valeroyl cellulose (C-6)>
Instead of methyl cellulose in Synthesis Example 5 (manufactured by Wako Pure Chemical Industries, Ltd .: methyl substitution degree 1.8), hydroxypropylmethyl cellulose (trade name Metroze 90SH-100: manufactured by Shin-Etsu Chemical Co., Ltd.) and valeroyl in place of 2-ethylhexanoyl chloride Valeroxypropylmethylvaleroylcellulose (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).

Note that the types and substitution degrees of hydrocarbon groups, the types and molar substitutions of alkyleneoxy groups, the types of acyl groups, and the degrees of acylation of the cellulose derivatives obtained above are described in Cellulose Communication 6, 73-79 (1999). Were observed and determined by 1H-NMR using the method described in 1). 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, a colloid titration method is performed, and the degree of substitution of carboxyl groups or sulfonic acid groups in the cellulose derivatives (C-1) to (C-7) is less than 0.02 (that is, the content of carboxyl groups or sulfonic acid groups 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 a molecular weight calibration curve obtained in advance from a constituent curve of standard monodisperse polystyrene was used. 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) The degree of substitution is summarized in Table 1. Table 1 also shows the cellulose derivative (H-1) used in the comparative example.

[Production of molded body]
0.5% by mass of cellulose derivative (C-1 to C-7, H-1), lubricant (L-1 to L-22), antioxidant (“Irganox 1010” manufactured by Ciba Specialty Chemicals) Compounding ratios (mass%) shown in Table 2 were mixed and mixed with a Henschel mixer to prepare a molding material. This molding material was supplied to a twin-screw kneading extruder (manufactured by Technobel, Ultranano) to produce pellets. Subsequently, the obtained pellets were supplied to an injection molding machine (Fanoc Corp., Robot S-2000i, automatic injection molding machine) to form a multi-purpose test piece of 4 mm × 10 mm × 80 mm.

In Table 2, the lubricants are as follows.
[Lubricant]
Ester lubricant (L-1): “Rikemar S-100” (glycerin monostearate) manufactured by Riken Vitamin
(L-2): “Riquemar S-300W” (Sorbitan stearate) manufactured by Riken Vitamin
(L-3): “Riquemar EW-200” (pentaerythritol adipate stearate polymer ester) manufactured by Riken Vitamin
(L-4): “Yunistar H-476” (pentaerythritol tetrastearate) manufactured by NOF
(L-5): “AX-518” manufactured by Daikyo Kasei Kogyo Co., Ltd. (stearyl phosphate ester mixture)
Fatty acid-based lubricant (L-6): “Licowax OP” (Montanic acid wax) manufactured by Clariant
(L-7): “Lunac S-50V” (stearic acid) manufactured by Kao Corporation
Aliphatic amide lubricant (L-8): “Light Amide WH255” (Carboxylic Acid Amide Wax), manufactured by Kyoeisha Oil Chemical Co., Ltd.
(L-9): “Fatty Acid Amide S” (stearic acid amide) manufactured by Kao Corporation
(L-10): “Fatty Acid Amide ON” (oleic amide) manufactured by Kao Corporation
(L-11): “Fatty Acid Amide E” (erucic acid amide) manufactured by Kao Corporation
(L-12): Kao Wax EB-P (ethylenebisstearic acid amide) manufactured by Kao Corporation
Alcohols (L-13): “Calcoal 8098” (stearyl alcohol) manufactured by Kao Corporation
Metal soaps (L-14): Mg stearate (Reagent manufactured by Wako Pure Chemical Industries, Ltd.)
(L-15): Zinc stearate (Reagent manufactured by Wako Pure Chemical Industries, Ltd.)
(L-16): “SC-100” (calcium stearate) manufactured by Sakai Chemical Industry Co., Ltd.
(L-17): “TSVN-2000E” (butyltin maleate) manufactured by Nitto Kasei Co., Ltd.
Waxes (L-18): “High Wax 420P” (low molecular polyethylene wax) manufactured by Mitsui Chemicals
(L-19): “AC629A” (polyethylene oxide wax) manufactured by Allied Signal
(L-20): Nippon Seiwa Co., Ltd. “Lubacs 2191” (microcrystalline wax)
-Polymeric lubricant (L-21): “Paraloid K125P” (polymer lubricant) manufactured by Kureha Chemical Co., Ltd.
(L-22): “Metablene L-1000” (acrylic polymer) manufactured by Mitsubishi Rayon Co., Ltd.

[Evaluation]
The following items were evaluated using the obtained multipurpose test piece. The evaluation results are shown in Table 2.

(Charpy impact strength)
In accordance with ISO 179, a notch having an incident angle of 45 ± 0.5 ° and a tip of 0.25 ± 0.05 mm is formed on a test piece molded by injection molding, 23 ° C. ± 2 ° C., 50% ± 5% RH Then, the impact strength was measured edgewise with a Charpy impact tester (manufactured by Toyo Seiki Seisakusho). The measurement is an average of three measurements.
(Profile extrusion processability)
Barrel temperature 170-195 ° C (C1 = 170 ° C, C2 = 185 ° C, C3 = 195 ° C), mold temperature 210 ° C, screw rotation speed 70rpm, using Thermo-Plastic Industries' different direction twin screw extruder TP-20T A test piece having a U-shaped section (width 60 mm, height 25 mm, thickness 2.5 mm) with an amount of 2.5 kg / h was extruded for 30 minutes. The drawdown property was evaluated with x indicating that the drawdown was remarkable, ○ indicating that there was little drawdown, and Δ indicating an intermediate drawdown. Further, the appearance of the molded product was evaluated by observing the state of the surface of the test piece, with × indicating that the scratches and sink marks such as die lines were conspicuous, ○ indicating that there was almost no appearance defect, and ○ indicating an intermediate product.

The results are shown in Table 2.

From Table 2, the molded body formed of the molding material of the example has better thermoplasticity, moldability, impact resistance, draw-down property of the profile extrusion molding, and the appearance of the profile extrusion molded product, as compared with the comparative example. It became clear to have.

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, impact resistance, profile extrusion drawdown, and profile extrusion molded product appearance, such as automobiles, It can be suitably used as a component part for home appliances, electrical and electronic equipment, mechanical parts, housing / building materials, and 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.

Although the present invention has been described in detail and with reference to specific embodiments, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention.
This application is based on a Japanese patent application (Japanese Patent Application No. 2009-295088) filed on Dec. 25, 2009, the contents of which are incorporated herein by reference.

Claims (15)

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;
   Molding material containing a lubricant.
   A) Hydrocarbon group: —R _A
   B) Acyl group: —CO—R _B (R _B represents a hydrocarbon group.)
2. The molding material according to claim 1, 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. )
3. The molding material according to claim 2, wherein the C) group containing an alkyleneoxy group and an acyl group is a group containing a structure 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.)
4. The molding material according to any one of claims 1 to 3, wherein R _A is an alkyl group having 1 to 4 carbon atoms.
5. The molding material according to any one of claims 1 to 4, wherein R _A is a methyl group or an ethyl group.
6. The molding material according to any one of claims 2 to 5, wherein R _B and R _C1 are each independently an alkyl group or an aryl group.
7. The molding material according to any one of claims 2 to 6, wherein R _B and R _C1 are each independently a methyl group, an ethyl group, or a propyl group.
8. The molding material according to any one of claims 1 to 6, wherein R _B is a hydrocarbon group having a branched structure having 3 to 10 carbon atoms.
9. The molding material according to any one of claims 2 to 8, wherein the alkyleneoxy group is a group represented by the following formula (1) or (2).
   

   
10. The molding material according to any one of claims 1 to 9, wherein the cellulose derivative has substantially no carboxyl group, sulfonic acid group, or salt thereof.
11. The molding material according to any one of claims 1 to 10, wherein the cellulose derivative is insoluble in water.
12. The lubricant is at least one selected from ester lubricants, fatty acid lubricants, fatty acid amide lubricants, alcohol lubricants, metal soaps, waxes, and polymer lubricants. The molding material as described in 2.
13. A molded body obtained by molding the molding material according to any one of claims 1 to 12.
14. A method for producing a molded body, comprising a step of heating and molding the molding material according to any one of claims 1 to 12.
15. A housing for electrical and electronic equipment comprising the molded body according to claim 13.