JP2021014488A - Thermoplastic resin composition, molded article and product - Google Patents

Abstract

To prevent adhesion of both hydrophilic dust stains and hydrophobic dust stains to a molded article composed of a thermoplastic resin composition.SOLUTION: There is provided a thermoplastic resin composition comprising an olefin-based resin (A), a hydrophilic copolymer (B) having a polyoxyethylene chain and a fatty acid metal salt (C) represented by the following formula (1): M(OH)y(R-COO)x (1)(wherein, R is an alkyl group or an alkenyl group having 6 to 40 carbon atoms, M is at least one metal element selected from the group consisting of aluminum, zinc, calcium, magnesium, lithium and barium, x and y each independently is an integer of 0 or more and satisfies the relation of x+y=[the valence of M].)SELECTED DRAWING: Figure 1

Description

The present invention relates to thermoplastic resin compositions, articles and products.

Olefin resins such as polypropylene resins and polyethylene resins are widely used in various applications such as internal parts of home appliances, housings, vehicle parts, and miscellaneous goods due to their excellent performance balance, and are used in various environments.

Dust stains such as dust, dust, soot, and oily smoke may adhere to the molded products of these olefin resins depending on the usage environment and usage method. If dust stains adhere to the molded product, the appearance may be deteriorated and the performance of the product may be deteriorated.

Therefore, in order to suppress the adhesion of dust stains, an attempt has been made to impart antistatic performance to an olefin resin molded product by using an antistatic agent.

For example, there is known a method of imparting antistatic performance to a molded product by spraying, dipping, coating or the like an antistatic agent on the surface of the molded product. However, in the method of attaching an antistatic agent to the surface of a molded product, most of the antistatic agents are water-soluble surfactants, and the antistatic agent is removed by wiping, washing, etc., and the antistatic effect is lost. There's a problem.

On the other hand, there is also known a method (kneading method) of imparting antistatic performance to a molded product of an olefin resin by blending an antistatic agent as an additive with the olefin resin. This kneading method has attracted attention in recent years because of its high antistatic effect.

Various compounds are known as antistatic agents used in the kneading method. For example, Patent Document 1 (Japanese Unexamined Patent Publication No. 2011-256293) discloses a fatty acid amide compound of aminoethylethanolamine. Patent Document 2 (Japanese Patent Laid-Open No. 58-118838) and Patent Document 3 (Japanese Patent Laid-Open No. 3-290464) disclose polyether ester amides. Patent Document 4 (Japanese Patent Laid-Open No. 2001-278985), Patent Document 5 (International Publication No. 2014/115745) and Patent Document 6 (International Publication No. 2014/148454) describe a block of olefins and a block of hydrophilic polymers. Block copolymers and the like comprising the above are disclosed, and Patent Documents 5 and 6 disclose a polyether ester-based polymer-type antistatic agent.

In addition, Patent Document 1 discloses that an alkali metal compound, an alkaline earth metal compound (for example, calcium stearate) and the like are used in combination in order to improve the antistatic effect of the fatty acid amide compound of aminoethylethanolamine. There is. Further, in Patent Document 4, in order to improve the antistatic effect of a block copolymer composed of a block of an olefin and a block of a hydrophilic polymer, an alkali metal compound such as lithium chloride, potassium acetate, or sodium dodecylbenzenesulfonate is used in combination. It is disclosed to do. Further, Patent Documents 5 and 6 disclose that an alkali metal compound such as potassium acetate or sodium dodecylbenzenesulfonate is blended with a polyether ester-based polymer-type antistatic agent.

Japanese Unexamined Patent Publication No. 2011-256293 Japanese Unexamined Patent Publication No. 58-118838 Japanese Unexamined Patent Publication No. 3-290464 Japanese Unexamined Patent Publication No. 2001-278985 International Publication No. 2014/115745 International Publication No. 2014/148454

However, although all of the above antistatic agents are effective in suppressing the adhesion of hydrophilic dust stains such as dust and dirt, they are effective in suppressing the adhesion of hydrophobic dust stains such as soot and oil smoke. , Almost no recognition. That is, no resin composition has been provided in which both hydrophilic dust stains and hydrophobic dust stains are difficult to adhere to.

Therefore, an object of the present invention is to suppress adhesion of both hydrophilic dust stains and hydrophobic dust stains to a molded product made of a thermoplastic resin composition.

Olefin resin (A) and
Hydrophilic copolymer (B) having a polyoxyethylene chain and
A thermoplastic resin composition containing a fatty acid metal salt (C) represented by the following formula (1).

M (OH) y (R-COO) x ... (1)

(In formula (1), R is an alkyl group or an alkenyl group having 6 to 40 carbon atoms. M is at least one metal selected from the group consisting of aluminum, zinc, calcium, magnesium, lithium and barium. It is an element. X and y are independent integers of 0 or more, and satisfy the relationship of x + y = [valence of M].)

In the present invention, by blending the hydrophilic copolymer (B) and the fatty acid metal salt (C) with the olefin resin (A), hydrophilic dust stains on the molded product made of the thermoplastic resin composition It is possible to suppress the adhesion of both the hydrophobic dust stain and the hydrophobic dust stain.

It is sectional drawing which shows an example of the molded article which concerns on Embodiment 2. FIG. It is a schematic graph which shows the composition distribution in the depth direction about the example of the molded article which concerns on Embodiment 2. It is a conceptual diagram for demonstrating the thermoplastic resin composition which concerns on embodiment. It is a conceptual diagram for demonstrating the thermoplastic resin composition which concerns on embodiment. It is sectional drawing which shows an example of the air conditioner which concerns on Embodiment 3. FIG. It is a conceptual diagram for demonstrating the thermoplastic resin composition which concerns on embodiment.

Hereinafter, embodiments of the present invention will be described. In the drawings, the dimensional relationships such as length, width, thickness, and depth are appropriately changed for the purpose of clarifying and simplifying the drawings, and do not represent the actual dimensional relationships.

Embodiment 1.
The thermoplastic resin composition of the present embodiment is
Styrene resin (A) and
Hydrophilic copolymer (B) having a polyoxyethylene chain and
Contains a fatty acid metal salt (C).

In the molded product made of the thermoplastic resin composition of the present embodiment, a remarkable antifouling effect is exhibited in which adhesion of both hydrophilic dust stains and hydrophobic dust stains is suppressed. It should be noted that such an effect is exerted by the thermoplastic resin composition containing all of the above components (A) to (C), and only the component (A), only the component (B), only the component (C), and the component (A). It is difficult to obtain such a remarkable antifouling effect only with (B), components (A) and (C), or with components (B) and (C) alone.

The molded product made of the thermoplastic resin composition of the present embodiment can also have better mechanical strength such as impact resistance.

<Olefin resin (A)>
The olefin resin (A) is a synthetic resin obtained by polymerizing or copolymerizing an olefin monomer having a radically polymerizable double bond.

The olefin-based monomer is not particularly limited, and examples thereof include α-olefins and conjugated diene. Examples of the α-olefin include ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 4-methyl-1-pentene and the like. Examples of the conjugated diene include butadiene and isoprene. The olefin-based monomer may be used alone or in combination of two or more.

The olefin resin (A) is not particularly limited, and is, for example, a homopolymer of ethylene, a copolymer of ethylene and α-olefin other than ethylene, a homopolymer of propylene, and α-olefin of propylene and other than propylene. Examples thereof include a copolymer with and a homopolymer of butene, a homopolymer of a conjugated diene such as butadiene and isoprene, and a copolymer. As the olefin resin (A), a homopolymer of propylene or a copolymer of propylene and an α-olefin other than propylene is preferable.

When the olefin resin (A) is a copolymer of propylene and another monomer (polypropylene copolymer), the α-olefin for copolymerization other than propylene is a linear α-olefin or branched. A state α-olefin or the like can be preferably used. Examples of the linear olefin include ethylene, butene-1, pentene-1, hexene-1, heptene-1, octene-1 and the like. Examples of the branched α-olefin include 2-methylpropene-1,3-methylpentene-1,4-methylpentene-1,5-methylhexene-1,4-methylhexene-1,4,4-dimethyl. Examples include Penten-1 and the like. These copolymerization α-olefins may be used alone or in combination of two or more.

The blending amount of these α-olefins (copolymerization component) for copolymerization in the olefin resin (A) is preferably 30% by mass or less, more preferably 20% by mass or less. The mode of the copolymer when these are copolymerized is not particularly limited, and may be, for example, a random type, a block type, a graft type, a mixture thereof, or the like. The polypropylene-based copolymer (copolymer of propylene and another monomer) may be any of commonly used random copolymers, block copolymers, and the like. Preferred examples of the polypropylene-based copolymer include a propylene-ethylene copolymer, a propylene-butene-1 copolymer, a propylene-ethylene-butene-1 copolymer and the like.

The olefin resin (A) includes, for example, the above-mentioned polypropylene-based polymer (polymer of propylene monomer), polypropylene-based copolymer, and the like, an acid anhydride group, a carboxyl group, a hydroxyl group, an amino group, and the like. A functional group-containing olefin resin having at least one functional group selected from the group consisting of isocyanate groups can also be used.

The MFR (Melt Flow Rate) value (230 ° C., 2.16 kg load) of the olefin resin (A) is preferably 20 to 40 g / 10 minutes, and more preferably 25 to 35 g / 10 minutes. When the MFR value of the olefin resin (A) is within these ranges, the fluidity of the thermoplastic resin composition of the present embodiment and the mechanical strength of the molded product made of the thermoplastic resin composition are balanced.

<Hydrophilic copolymer (B)>
The hydrophilic copolymer (B) has a polyoxyethylene chain. Since the polyoxyethylene chain functions as a hydrophilic segment, having the polyoxyethylene chain exhibits antistatic performance and suppresses the adhesion of hydrophilic dust stains.

Examples of the hydrophilic copolymer (B) include a hydrophilic copolymer (B1) in which a polyolefin and a hydrophilic polymer having a polyoxyethylene chain are repeatedly and alternately bonded to each other, a polyether ester amide, and the like.

The hydrophilic copolymer (B) preferably contains the above-mentioned hydrophilic copolymer (B1). In other words, the hydrophilic copolymer (B1) is a copolymer having a plurality of blocks derived from polyolefin and a plurality of blocks derived from a hydrophilic polymer having a polyoxyethylene chain alternately. By using the hydrophilic copolymer (B1), the antifouling effect of the thermoplastic resin composition (molded product) is further enhanced.

The hydrophilic copolymer (B) having a polyoxyethylene chain (particularly, the above-mentioned hydrophilic copolymer (B1)) has a higher heat when mixed with the olefin resin (A) than other hydrophilic polymers or antistatic agents. It is characterized in that it easily collects on the surface of a molded product made of a plastic resin composition. That is, the hydrophilic copolymer (B) having a polyoxyethylene chain is present in a large amount on the surface of the molded product without being embedded in the molded product, as compared with other hydrophilic polymers and antistatic agents. Therefore, the antifouling effect is efficiently exhibited with respect to the amount of the hydrophilic copolymer (B) having a polyoxyethylene chain added. Therefore, the amount of the hydrophilic copolymer (B) required to obtain the same antifouling performance may be smaller than that of other hydrophilic polymers.

Hydrophilic copolymers (B1) in which polyolefins and hydrophilic polymers having polyoxyethylene chains are repeatedly and alternately bonded are described in, for example, JP-A-2001-278985 and JP-A-2003-48990. It can be obtained by acid-denaturing polypropylene or polyethylene and reacting it with polyalkylene glycol.

Further, the polyether ester amide is a block-type copolymer having a polyoxyethylene chain as a hydrophilic segment, and can be obtained, for example, by the methods described in JP-A-49-8472 and JP-A-6-287547. it can.

The mass average molecular weight of the polyoxyethylene chain is preferably 1,000 to 15,000 from the viewpoint of heat resistance and reactivity with the polyolefin chain.

Since the hydrophilic copolymer (B) of the present embodiment exhibits an effect of suppressing adhesion to hydrophilic dust stains by being dispersed in the thermoplastic resin composition, the surface resistance value of the hydrophilic copolymer (B) itself is high. Usually, it is preferable to be as low as possible. The surface resistance value of the hydrophilic copolymer (B) is preferably 1 × 10 ⁴ to 1 × 10 ¹⁰ Ω, and more preferably 1 × 10 ⁴ to 1 × 10 ⁷ Ω.

For the purpose of improving the effect of suppressing adhesion to hydrophilic dust stains, the thermoplastic resin composition may further contain an antistatic agent other than the above-mentioned hydrophilic polymer. Examples of other antistatic agents include surfactants (anionic surfactants, cationic surfactants, nonionic surfactants, amphoteric surfactants, etc.), ionic liquids, and the like.

In addition, the hydrophilic copolymer (B) having a polyoxyethylene chain also has another special effect.

In order to obtain amphoteric (hydrophilic and hydrophobic) antifouling properties, both a hydrophilic copolymer (B) and a fatty acid metal salt (C) described later are required, but the fatty acid metal salt (C) is hydrophilic. Since the molecular weight is smaller than that of the copolymer (B) and the entanglement with the olefin resin (A) is small, it may fall off from the surface of the molded product or deteriorate. However, a large amount of the hydrophilic copolymer (B) is present on the surface of the molded product, and the fatty acid metal salt (C) is added to the hydrophilic group of the hydrophilic copolymer (B) which prevents the adhesion of hydrophilic dust stains by the antistatic effect. By adhering the hydrophilic group, the fatty acid metal salt (C) can be stably present on the surface without falling off.

On the opposite side of the hydrophilic group of the fatty acid metal salt (C), there is R, which is a non-polar hydrophobic group of the fatty acid metal salt (C), so that it has a high adhesion suppressing effect on hydrophobic dust stains. A new effect that cannot be obtained by B) alone can be obtained.

That is, the hydrophilic copolymer (B) having a polyoxyethylene chain and the fatty acid metal salt (C) are both present on the surface of the molded product and exert a synergistic effect with each other, thereby highly suppressing adhesion to dust stains of both sexes. The effect (antifouling property) is exhibited.

<Fatty acid metal salt (C)>
The fatty acid metal salt (C) is a compound represented by the following formula (1).

M (OH) y (R-COO) x ... (1)

(In formula (1), R is an alkyl group or an alkenyl group having 6 to 40 carbon atoms. M is at least one metal selected from the group consisting of aluminum, zinc, calcium, magnesium, lithium and barium. It is an element. X and y are independent integers of 0 or more, and satisfy the relationship of x + y = [valence of M].)

Only by using the above-mentioned hydrophilic polymer or antistatic agent as an additive, the effect of suppressing the adhesion of hydrophilic dust stains can be obtained, but the effect of suppressing the adhesion of hydrophobic dust stains is low, and a comparative example described later In this case, the amount of hydrophobic dust adhered is not less than half, so new means are required.

In addition, additives that generally have water and oil repellency effects include silicone oil, fluororesin such as PTFE, and hydrophobic silica such as fumed silica, but all of these additives are hydrophobic dust. The effect of suppressing the adhesion of dirt was not obtained either. This is because when added to the resin, it is buried inside the resin and the above-mentioned additive does not appear on the surface. A fatty acid metal salt (C) is blended together with an olefin resin (A) and a hydrophilic copolymer (B) as a material that can be present on the surface at a high concentration and has hydrophobicity and water / oil repellency. By doing so, the problem can be solved.

The fatty acid metal salt used in this embodiment is a fatty acid metal salt represented by the formula (1).

M (OH) y (R-COO) x ... (1)

(In formula (1), R is an alkyl group or an alkenyl group having 6 to 40 carbon atoms. M is at least one metal selected from the group consisting of aluminum, zinc, calcium, magnesium, lithium and barium. It is an element. X and y are independent integers of 0 or more, and satisfy the relationship of x + y = [valence of M].)

In the formula (1), the carbon number of R is 6 to 40, preferably 11 to 27, and more preferably 15 to 20. When the carbon number of R is smaller than 6, or when the carbon number is larger than 40, the effect of preventing the adhesion of dust becomes small, which is not preferable. Further, R is an alkyl group or an alkenyl group, preferably an alkyl group.

Generally, when the contact angle with water is higher than that of petroleum or mineral oil, it is said to have water and oil repellency, and when the contact angle with water is higher than 90 degrees, it is said to be hydrophobic. The fatty acid metal salt (C) corresponds to this.

(Metal element M)
In formula (1), M is at least one metal element selected from the group consisting of aluminum, zinc, calcium, magnesium, lithium and barium.

M is preferably at least one metal element selected from aluminum and zinc. In this case, the thermoplastic resin composition can exhibit higher antifouling performance. Further, M is more preferably aluminum. In this case, the thermoplastic resin composition can exhibit even higher antifouling performance.

With reference to FIG. 3, when the ionic radius of M is small (FIGS. 3 (a1) and (a2)), the heat is higher than when the ionic radius of M is large (FIGS. 3 (b1) and (b2)). This is because the non-polar groups (hydrophobic groups) of the fatty acid metal salt can be densely arranged on the surface of the molded product made of the plastic resin composition. When the hydrophobic groups become dense, the effect of suppressing the adhesion of hydrophobic dust stains is enhanced. The ionic radii of M are 54 for aluminum, 74 for zinc, 100 for calcium, and 135 for barium, respectively, with aluminum being the smallest and zinc being the smallest. Therefore, in order to enhance the antifouling effect, aluminum is the most suitable as the metal element M, followed by zinc.

(fatty acid)
Examples of the fatty acid constituting the fatty acid metal salt (C) of the present embodiment include caproic acid, caproic acid, lauric acid, palmitic acid, stearic acid, behenic acid, lignoceric acid, montanic acid, oleic acid, linoleic acid and the like. Can be mentioned. The fatty acid is preferably a long chain fatty acid (fatty acid having 12 or more carbon atoms) such as stearic acid, behenic acid, and montanic acid. In particular, stearic acid is more preferable for production because it is easily available and inexpensive.

Examples of the fatty acid metal salt (C) include zinc stearate, zinc 12-hydroxystearate, zinc laurate, zinc oleate, zinc 2-ethylhexarate, aluminum tristearate, and aluminum monostearate (dihydroxy). Examples thereof include aluminum distearate (hydroxy), aluminum 12-hydroxystearate, aluminum laurate, aluminum oleate, and aluminum 2-ethylhexanoate. The fatty acid metal salt (C) is preferably zinc stearate, aluminum tristearate, aluminum monostearate (dihydroxy), and aluminum distearate (hydroxy), and more preferably aluminum distearate (hydroxy). is there. The fatty acid metal salt (C) may be used alone or in combination of two or more.

Aluminum stearate, zinc stearate, calcium stearate, and barium stearate are characterized by smoothness, high water repellency, and low surface free energy (approximately 21.2 mN / m). A material having a low surface free energy has a stable surface state such as fluororesin (surface free energy: about 21.5 mN / m), so that dirt does not easily adhere to it. By forming a layer of aluminum stearate having a low surface free energy on the surface of a molded product made of a thermoplastic resin composition, the effect of preventing the adhesion of hydrophobic dust stains such as carbon black, soot, and oil smoke is exhibited. Further, since the surface free energy is lowered, hydrophilic dust stains such as dust, dust, and soil are less likely to adhere. Therefore, in addition to the static elimination effect of the hydrophilic copolymer (B) blended in the thermoplastic resin composition, the antifouling property against hydrophobic dust stains and hydrophilic dust stains is further improved.

(Valence)
In the formula (1), x and y are independent integers of 0 or more, and satisfy the relationship of x + y = [valence of M].

When the valence of M is 1, y is 0, but when the valence of M is 2 or more, y is 0 or an integer of 1 or more. When the valence of M is 3 or more, y is preferably 1. In this case, the thermoplastic resin composition can exhibit higher antifouling performance.

As an example, aluminum stearate, which is a long chain fatty acid salt of aluminum having a valence of M of 3, will be described.

As aluminum stearate, monotype aluminum monostearate containing one stearic acid [Al (C ₁₇ H ₃₅ COO) (OH) ₂ ] and ditype aluminum distearate containing two stearic acid [Al (C ₁₇₎ There are H ₃₅ COO) ₂ (OH)] and tritype aluminum tristearate [Al (C ₁₇ H ₃₅ COO) ₃ ] containing three stearic acids.

With reference to FIG. 4, aluminum tristearate is difficult to migrate to the surface of the molded product due to the large amount of non-polar groups (FIG. 4A), and is an unstable substance, so that the moisture in the air Hydrolyzes to form a mixture with aluminum monostearate or aluminum distearate. Therefore, in the case of aluminum distearate, it is easier to migrate to the surface of the molded product (FIG. 4B), and the dust suppressing effect of both sexes is higher than that of aluminum tristearate. Similarly, even when the valence of M is more than 3, the ditype fatty acid metal salt having a smaller number of fatty acids than the tritype has a higher effect of suppressing dust of both sexes.

On the other hand, aluminum monostearate has a smaller number of R, which is a non-polar group (hydrophobic group), than aluminum distearate when the number of aluminum is the same (FIG. 4 (c)). Therefore, the case of aluminum distearate has a higher effect of suppressing amphoteric dust than aluminum monostearate.

When the vicinity of the surface of the molded product was actually measured using time-of-flight secondary ion mass spectrometry (TOF-SIMS), C ₁₈ H ₃₅ O ₂ ⁻ derived from stearic acid was detected as a secondary ion. Since the detection depth of TOF-SIMS is generally 1 to 2 nm, it was confirmed that stearic acid is present on the outermost surface of the molded product.

The secondary ion intensity ratio of C ₁₈ H ₃₅ O ₂ ^{− based on} the ion intensity of C ₂ H ⁻ , which is the main peak in polystyrene analysis, is 0.341 in the case of a molded product using aluminum distearate. This was 2 to 4 times or more as compared with the case of the molded product using aluminum monostearate (0.0687) and the case of the molded product using aluminum tristearate (0.172). Therefore, in the molded product using aluminum distearate having y = 1, many non-polar groups (hydrophobic groups) are present on the surface, and the dust suppressing effect is most likely to be exhibited.

For the same reason as in the case where the valence of M is 3 or more, the ditype fatty acid metal salt suppresses the dust of both sexes more than the monotype fatty acid metal salt even when the valence of M is 2. Highly effective. Therefore, when the valence of M is 2, y is preferably 0 (x is 2).

<Contents of each component>
In the thermoplastic resin composition of the present embodiment, the blending amount of the hydrophilic copolymer (B) is preferably 1 to 20 parts by mass, more preferably 1 part by mass with respect to 100 parts by mass of the olefin resin (A). ~ 17 parts by mass.

The blending amount of the fatty acid metal salt (C) is preferably 0.6 to 10 parts by mass, and more preferably 1 to 8 parts by mass with respect to 100 parts by mass of the olefin resin (A).

The thermoplastic resin composition of the present embodiment particularly comprises 100 parts by mass of the olefin resin (A), 1 to 20 parts by mass of the hydrophilic copolymer (B), and 0.5 to 10 parts by mass of the fatty acid metal salt (C). It is preferable to contain a portion.

The fatty acid metal salt (C) is generally blended in a thermoplastic resin composition in an amount of 0.5% by mass or less (particularly about 0.1%) as a lubricant, a mold release agent, etc. for improving moldability. In some cases, by blending more than 0.5% by mass of the fatty acid metal salt (C), both the hydrophilic copolymer (B) and the fatty acid metal salt (C) are concentrated on the surface of the molded product at a high concentration. The action of making it exist is exerted, and the antifouling effect of both sexes is further improved.

When the blending amount of the hydrophilic copolymer (B) exceeds 20 parts by mass, the mechanical strength such as elastic modulus decreases, and when it is less than 1 part by mass, the effect of suppressing the adhesion of dust is observed. become.

When the blending amount of the fatty acid metal salt (C) exceeds 10 parts by mass, the heat resistance and impact resistance are lowered, and when it is less than 0.6 parts by mass, the effect of suppressing dust adhesion is lowered. Will be able to.

As described above, the fatty acid metal salt (C) is generally used for a purpose different from the object of the present embodiment, which is to suppress the adhesion of amphoteric dust stains of hydrophilic dust stains and hydrophobic dust stains. There are times. It is used, for example, as a lubricant, a molding improver, a mold release agent, an anti-fog agent, etc., as disclosed in JP-A-2004-168555, JP-A-2003-183529, and the like. In this case, the blending amount of the fatty acid metal salt (C) is less than 0.5 parts by mass with respect to 100 parts by mass of the olefin resin (A). Furthermore, it is 0.1 parts by mass or less in general usage related to the manufacturing industry. Further, the effect of suppressing the adhesion of dust of the fatty acid metal salt (C) has not been known so far.

In the present embodiment, for a purpose completely different from the conventional usage, in order to obtain the effect of suppressing the adhesion of both hydrophilic dust stains and hydrophobic dust stains, a fatty acid metal salt (more than a generally used amount) It has been found that the effect of suppressing adhesion to dust stains of both sexes can be obtained for the first time by sufficiently increasing the amount of C). Therefore, the blending amount of the fatty acid metal salt (C) is preferably 0.6 parts by mass or more, and more preferably 1 to 8 parts by mass with respect to 100 parts by mass of the olefin resin (A). In this case, a good dust suppression effect equal to or higher than that obtained by coating the surface of the molded product with dust suppression coating can be obtained. No example has been known so far in which 1 part by mass or more of the fatty acid metal salt (C) is blended with 100 parts by mass of the thermoplastic resin for the purpose of suppressing dust.

The non-polar hydrophobic group R of the fatty acid metal salt, which is suitable for the air, has a new effect of suppressing the adhesion of hydrophobic dust stains. By adding the fatty acid metal salt (C) in an amount of 0.6% by mass or more with respect to the olefin resin (A), many hydrophobic groups can be densely arranged on the surface of the molded product made of the thermoplastic resin composition. This makes it possible to enhance the effect of suppressing the adhesion of hydrophobic dust stains.

As will be described later, the antistatic effect of the hydrophilic copolymer (B) having a polyoxyethylene chain enhances the effect of suppressing the adhesion of hydrophilic dust stains, and the addition of the fatty acid metal salt (C) makes it hydrophobic. The effect of suppressing the adhesion of dust stains is enhanced, and a new effect that is strong against stains of both sexes can be obtained.

<Arbitrary ingredient>
The thermoplastic resin composition of the present embodiment has, as an optional component, for example, a heat stabilizer, an ultraviolet absorber, a light stabilizer, an antibacterial agent, an antifungal agent, and an inorganic substance, as long as the object of the present embodiment is not impaired. It may contain components such as a filler.

(Heat stabilizer)
The thermoplastic resin composition of the present embodiment may contain a heat stabilizer in order to improve the heat stability during production and the like.

As the heat stabilizer, it is preferable to use a phosphorus-based stabilizer and / or a hindered phenol-based antioxidant, and it is more preferable to use these in combination.

The amount of the phosphorus-based stabilizer and / or the hindered phenol-based antioxidant added to the thermoplastic resin composition of the present embodiment is not particularly limited.

Since the effect of improving thermal stability can be effectively obtained and the blending amount of each of the above essential components is not affected, it is preferably 0.01 to 1 with respect to 100 parts by mass of the thermoplastic resin composition. It is by mass, more preferably 0.01 to 0.6 parts by mass.

Examples of the phosphorus-based stabilizer include phosphorous acid, phosphoric acid, phosphonic acid, phosphonic acid, and esters, phosphonite compounds thereof, tertiary phosphine and the like.

Examples of phosphite (phosphite compounds) include triphenylphosphite, tris (nonylphenyl) phosphite, tridecylphosphite, distearylpentaerythritol diphosphite, and bis (2,4-di-tert-butylphenyl). ) Pentaerythritol diphosphite, bis (2,6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphite, bis {2,4-bis (1-methyl-1-phenylethyl) phenyl} penta Examples thereof include erythritol diphosphite, phenylbisphenol A pentaerythritol diphosphite, bis (nonylphenyl) pentaerythritol diphosphite, and dicyclohexylpentaerythritol diphosphite.

As the phosphite ester (phosphite compound), in addition to the above, those having a cyclic structure by reacting with dihydric phenols can also be used.

For example, 2,2'-methylenebis (4,6-di-tert-butylphenyl) (2,4-di-tert-butylphenyl) phosphite, 2,2'-methylenebis (4,6-di-tert-). Examples thereof include butylphenyl) (2-tert-butyl-4-methylphenyl) phosphite and 2,2-methylenebis (4,6-di-tert-butylphenyl) octylphosphite.

Examples of the phosphoric acid ester (phosphate compound) include triphenyl phosphate and trimethyl phosphate.

Examples of the phosphonite compound include tetrakis (di-tert-butylphenyl) -biphenylenediphosphonite and bis (di-tert-butylphenyl) -phenyl-phenylphosphonite.

The phosphonite compound can be used in combination with the above-mentioned phosphite compound having an aryl group in which two or more alkyl groups are substituted, and is preferable.

Examples of the phosphonate ester (phosphonate compound) include dimethyl benzenephosphonate, diethyl benzenephosphonate, and dipropyl benzenephosphonate.

Examples of the tertiary phosphine include triphenylphosphine and the like.

Among the above phosphorus-based stabilizers, a phosphonite compound or a phosphite compound represented by the following general formula (2) is preferable.

(In the formula (2), R and R'represent an alkyl group having 6 to 30 carbon atoms or an aryl group having 6 to 30 carbon atoms, and may be the same or different from each other.)

As described above, the phosphonite compound is preferably tetrakis (2,4-di-tert-butylphenyl) -biphenylenediphosphonite.

More suitable phosphite compounds in the above formula (2) are distearyl pentaerythritol diphosphite, bis (2,4-di-tert-butylphenyl) pentaerythritol diphosphite, and bis (2,6-di-). tert-Butyl-4-methylphenyl) pentaerythritol diphosphite, and bis {2,4-bis (1-methyl-1-phenylethyl) phenyl} pentaerythritol diphosphite.

Examples of the hindered phenol compound include tetrakis [methylene-3- (3-tert-butyl-4-hydroxy-5-methylphenyl) propionate] methane and octadecyl-3- (3,5-di-tert-butyl-4-4). Hydroxyphenyl) propionate, and 3,9-bis [2- {3- (3-t-butyl-4-hydroxy-5-methylphenyl) propionyloxy} -1,1-dimethylethyl] -2,4,8 , 10-Tetraoxaspiro [5,5] undecane and the like.

The thermoplastic resin composition of the present embodiment may contain other thermal stabilizers other than the phosphorus-based stabilizer and the hindered phenol-based antioxidant, if necessary.

The other heat stabilizer is preferably used in combination with at least one of a phosphorus-based stabilizer and a hindered phenol-based antioxidant, and particularly preferably in combination with both.

Other heat stabilizers include lactone-based stabilizers typified by the reaction product of 3-hydroxy-5,7-di-tert-butyl-furan-2-one and o-xylene (details of this stabilizer). For reference, refer to Japanese Patent Application Laid-Open No. 7-233160).

Regarding the lactone-based stabilizer, Irganox HP-136 (registered trademark, manufactured by CIBA SPECIALTY CHEMICALS) and the like are commercially available.
Irganox HP-2921 (registered trademark, manufactured by CIBA SPECIALTY CHEMICALS) and the like are commercially available as stabilizers in which the above-mentioned lactone-based stabilizers, phosphite compounds, and hindered phenol compounds are mixed.

The amount of the lactone-based stabilizer added is preferably 0.0005 to 0.05 parts by mass, and more preferably 0.001 to 0.03 parts by mass with respect to 100 parts by mass of the thermoplastic resin composition.

Other stabilizers include sulfur-containing stabilizers such as pentaerythritol tetrakis (3-mercaptopropionate), pentaerythritol tetrakis (3-laurylthiopropionate), and glycerol-3-stearylthiopropionate. Be done.

The amount of the stabilizer other than the phosphorus-based stabilizer and / or the hindered phenol-based antioxidant in the thermoplastic resin composition of the present embodiment is not particularly limited, and is added to 100 parts by mass of the thermoplastic resin composition. On the other hand, it is preferably 0.0005 to 0.1 parts by mass, more preferably 0.001 to 0.08 parts by mass, and particularly preferably 0.001 to 0.05 parts by mass.

(UV absorber)
The thermoplastic resin composition of the present embodiment may contain an ultraviolet absorber. Since the thermoplastic resin composition of the present embodiment may be inferior in weather resistance due to the influence of the rubber component and the like, it is effective to add an ultraviolet absorber in order to improve the weather resistance.

Examples of the ultraviolet absorber of the present embodiment include a benzophenone-based ultraviolet absorber, a benzotriazole-based ultraviolet absorber, a hydroxyphenyltriazine-based ultraviolet absorber, a cyclic iminoester-based ultraviolet absorber, and a cyanoacrylate-based ultraviolet absorber. Examples include an ultraviolet absorber.

Examples of benzophenone-based ultraviolet absorbers include 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-octoxybenzophenone, 2-hydroxy-4-benzyloxybenzophenone, and 2-hydroxy. -4-methoxy-5-sulfoxybenzophenone, 2-hydroxy-4-methoxy-5-sulfoxitrihydride benzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, 2,2', 4,4'- Tetrahydroxybenzophenone, 2,2'-dihydroxy-4,4'-dimethoxybenzophenone, 2,2'-dihydroxy-4,4'-dimethoxy-5-sodium sulfoxybenzophenone, bis (5-benzoyl-4-hydroxy) Examples include -2-methoxyphenyl) methane, 2-hydroxy-4-n-dodecyloxybenzophenone, and 2-hydroxy-4-methoxy-2'-carboxybenzophenone.

Examples of the benzotriazole-based ultraviolet absorber include 2- (2-hydroxy-5-methylphenyl) benzotriazol, 2- (2-hydroxy-5-tert-octylphenyl) benzotriazol, and 2- (2). -Hydroxy-3,5-dicumylphenyl) phenylbenzotriazole, 2- (2-hydroxy-3-tert-butyl-5-methylphenyl) -5-chlorobenzotriazole, 2,2'-methylenebis [4-( 1,1,3,3-Tetramethylbutyl) -6- (2H-benzotriazole-2-yl) phenol], 2- (2-hydroxy-3,5-di-tert-butylphenyl) benzotriazol, 2- (2-Hydroxy-3,5-di-tert-butylphenyl) -5-chlorobenzotriazole, 2- (2-hydroxy-3,5-di-tert-amylphenyl) benzotriazol, 2-( 2-Hydroxy-5-tert-octylphenyl) benzotriazole, 2- (2-hydroxy-5-tert-butylphenyl) benzotriazole, 2- (2-hydroxy-4-octoxyphenyl) benzotriazole, 2,2'-Methylenebis (4-cumyl-6-benzotriazolephenyl), 2,2'-p-phenylenebis (1,3-benzoxazine-4-one), 2- [2-hydroxy-3-( 3,4,5,6-Tetrahydrophthalimidemethyl) -5-methylphenyl] Benzotriazole and the like can be mentioned. Examples of other benzotriazole-based ultraviolet absorbers include polymers having a 2-hydroxyphenyl-2H-benzotriazole skeleton. Examples of the polymer having a 2-hydroxyphenyl-2H-benzotriazole skeleton include 2- (2'-hydroxy-5-methacryloxyethylphenyl) -2H-benzotriazole and a vinyl-based monomer copolymerizable with the monomer. Examples thereof include a copolymer of 2- (2'-hydroxy-5-acryloxyethylphenyl) -2H-benzotriazole and a vinyl-based monomer copolymerizable with the monomer.

Examples of the hydroxyphenyltriazine-based ultraviolet absorber include 2- (4,6-diphenyl-1,3,5-triazine-2-yl) -5-hexyloxyphenol and 2- (4,6-diphenyl-). 1,3,5-Triazine-2-yl) -5-methyloxyphenol, 2- (4,6-diphenyl-1,3,5-triazine-2-yl) -5-ethyloxyphenol, 2-( 4,6-diphenyl-1,3,5-triazine-2-yl) -5-propyloxyphenol, and 2- (4,6-diphenyl-1,3,5-triazine-2-yl) -5- Examples include butyloxyphenol. Further, the phenyl groups of the compounds exemplified above, such as 2- (4,6-bis (2,4-dimethylphenyl) -1,3,5-triazine-2-yl) -5-hexyloxyphenol, are 2, Compounds substituted with 4-dimethylphenyl groups are exemplified.

Examples of the cyclic iminoester-based UV absorber include 2,2'-p-phenylene bis (3,1-benzoxazine-4-one) and 2,2'-(4,4'-diphenylene) bis ( 3,1-benzoxazine-4-one), 2,2'-(2,6-naphthalene) bis (3,1-benzoxazine-4-one) and the like can be mentioned.

Examples of the cyanoacrylate-based UV absorber include 1,3-bis-[(2'-cyano-3', 3'-diphenylacryloyl) oxy] -2,2-bis [(2-cyano-3,). Examples thereof include 3-diphenylacryloyl) oxy] methyl) propane and 1,3-bis-[(2-cyano-3,3-diphenylacryloyl) oxy] benzene.

Further, the ultraviolet absorber is a polymer-type ultraviolet absorber obtained by copolymerizing a photostable monomer having an ultraviolet absorbing monomer and / or a hindered amine structure with a monomer such as alkyl (meth) acrylate. It may be an agent. As the ultraviolet absorbing monomer, a compound which is a (meth) acrylic acid ester and contains a benzotriazole skeleton, a benzophenone skeleton, a triazine skeleton, a cyclic imino ester skeleton, and a cyanoacrylate skeleton in the ester substituent is preferable. Illustrated.

Among the above, benzotriazole-based and hydroxyphenyltriazine-based UV absorbers are preferable in terms of UV absorption ability, and cyclic iminoester-based and cyanoacrylate-based UV absorbers are preferable in terms of heat resistance and hue (transparency). Is preferable. The above-mentioned ultraviolet absorber may be used alone or in a mixture of two or more kinds.

The content of the ultraviolet absorber is preferably 0.01 to 2 parts by mass, more preferably 0.02 to 2 parts by mass, still more preferably 0.03 to 1 part by mass, based on 100 parts by mass of the thermoplastic resin composition. Parts, particularly preferably 0.05 to 0.5 parts by mass.

(Light stabilizer)
The thermoplastic resin composition of the present embodiment may contain a light stabilizer. Since the thermoplastic resin composition of the present embodiment may cause yellowing in a dark place, it is effective to add a light stabilizer in order to prevent such deterioration.

As such a light stabilizer, a hindered amine light stabilizer (HALS) can be preferably used. HALS is, for example, a compound represented by the following general formulas (3) to (6), and a combination of two or more of these compounds.

In the general formulas (3) to (6), R _{1 to} R ₃ are independent substituents.

Examples of the substituent include hydrogen, ether group, ester group, amine group, amide group, alkyl group, alkenyl group, alkynyl group, aralkyl group, cycloalkyl group, and aryl group.

These substituents may contain functional groups. Examples of the functional group include alcohol, ketone, anhydride, imine, siloxane, ether, carboxyl group, aldehyde, ester, amide, imide, amine, nitrile, ether, urethane, and a combination thereof.

As the hindered amine light stabilizer (HALS), a compound derived from a substituted piperidine compound is preferable, and a compound derived from an alkyl-substituted piperidyl, piperidinyl or piperazinone compound, and a substituted alkoxypiperidinyl compound is more preferable.

The hindered amine light stabilizer is, but is not limited to, for example, 2,2,6,6-tetramethyl-4-piperidone; 2,2,6,6-tetramethyl-4-piperidinol; bis. -(1,2,2,6,6-pentamethylpiperidyl)-(3', 5'-di-t-butyl-4'-hydroxybenzyl) butylmalonate; di- (2,2,6,6) -Tetramethyl-4-piperidyl) sebacate; N- (2-hydroxyethyl) -2,2,6,6-tetramethyl-4-piperidinol and succinic acid oligomer; cyanulic acid and N, N-di (2,) 2,6,6-Tetramethyl-4-piperidyl) -hexamethylenediamine oligomer; bis- (2,2,6,6-tetramethyl-4-piperidinyl) succinate; bis- (1-octyloxy-2, 2,6,6-tetramethyl-4-piperidinyl) sebacate; bis- (1,2,2,6,6-pentamethyl-4-piperidinyl) sebacate; tetrakis- (2,2,6,6-tetramethyl-) 4-Piperidyl) -1,2,3,4-butanetetracarboxylate; N, N'-bis- (2,2,6,6-tetramethyl-4-piperidyl) -hexane-1,6-diamine; N-butyl-2,2,6,6-tetramethyl-4-piperidinamine; 2,2'-[(2,2,6,6-tetramethyl-piperidinyl) -imino] -bis- [ethanol]; Poly ((6-morpholin-S-triazine-2,4-diyl) (2,2,6,6-tetramethyl-4-piperidinyl) -iminohexamethylene- (2,2,6,6-tetramethyl-) 4-Piperidinyl) -imino); 5- (2,2,6,6-tetramethyl-4-piperidinyl) -2-cyclo-undecyl-oxazole); 1,1'-(1,2-ethane-di-) Il) -bis- (3,3', 5,5'-tetramethyl-piperazinone); 8-acetyl-3-dodecyl-7,7,9,9-tetramethyl-1,3,8-triazaspiro (4) .5) Decane-2,4-dione; polymethylpropyl-3-oxy- [4 (2,2,6,6-tetramethyl) -piperidinyl] siloxane; 1,2,3,4-butane-tetracarboxylic Acid-1,2,3-tris (1,2,2,6,6-pentamethyl-4-piperidinyl) -4-tridecyl ester; α-methylstyrene-N- (2,2,6,6-tetra Methyl-4-piperidinyl) maleimide and N-stearyl Copolymer with Maleimide; 1,2,3,4-butanetetracarboxylic acid-β, β, β', β'-tetramethyl-2,4,8,10-tetraoxaspiro [5.5] undecane-3 , 9-Diethanol and 1,2,2,6,6-pentamethyl-4-piperidinyl ester copolymer; 2,4,8,10-tetraoxaspiro [5.5] undecane-3,9-diethanol Β, β, β', β'-tetramethyl-polymer with 1,2,3,4-butanetetracarboxylic acid, 2,2,6,6-tetramethyl-4-piperidinyl ester; D-glucitol, 1,3: 2,4-bis-o- (2,2,6,6-tetramethyl-4-piperidinylidene)-; 7-oxa-3,20-diazadispiro [5.1.11.2 ] -Ompartium of heneicosan-21-one-2,2,4,4-tetramethyl-20- (oxylanylmethyl); propanic acid, [(4-methoxyphenyl) methylene]-, bis (1,2) , 2,6,6-pentamethyl-4-piperidinyl) ester; formamide, N, N'-1,6-hexanediylbis [N- (2,2,6,6-tetramethyl-4-piperidinyl; 1, 3,5-triazine-2,4,6-triamine, N, N'''-[1,2-ethanediylbis [[[4,6-bis [butyl (1,2,2,6,6-pentamethyl-) 4-piperidinyl) amino] -1,3,5-triazin-2-yl] imino] -3,1-propanediyl]]-bis [N', N''-dibutyl-N', N''-bis (1,2,2,6,6-pentamethyl-4-piperidinyl); poly [[6-[(1,1,3,33-tetramethylbutyl) amino] -1,3,5-triazine-2, 4-Diyl] [(2,2,6,6-tetramethyl-4-piperidinyl) -imino] -1,6-hexanediyl [(2,2,6,6-tetramethyl-4-piperidinyl) imino] ]; 1,5-Dioxaspiro (5.5) undecane 3,3-dicarboxylic acid, bis (2,2,6,6-tetramethyl-4-piperidinyl) ester; 1,5-dioxaspiro (5.5) undecane 3,3-Dicarboxylic acid, bis (1,2,2,6,6-pentamethyl-4-piperidinyl) ester; N-2,2,6,6-tetramethyl-4-piperidinyl-N-amino-oxamid; 4-Acryloyloxy-1,2,2,6,6-pentamethyl-4-piperidin; 1,5,8,12 -Tetrakiss [2', 4'-bis (1'', 2'', 2'', 6'', 6''-pentamethyl-4''-piperidinyl (butyl) amino) -1', 3', 5'-Triazine-6'-yl] -1,5,8,12-tetraazadodecane; 3-dodecyl-1- (2,2,6,6-tetramethyl-4-piperidyl) -pyrrolidin-2, 5-dione; 1,1'-(1,2-ethane-diyl) -bis- (3,3', 5,5'-tetra-methyl-piperazinone); 1,1'1''-( 1,3,5-triazine-2,4,6-triyltris ((cyclohexylimino) -2,1-ethanediyl) tris (3,3,5-5-tetramethylpiperazinone); 1,1', 1 ''-(1,3,5-triazine-2,4,6-triyltris ((cyclohexylimino) -2,1-ethanediyl) tris (3,3,4,5,5-tetramethylpiperazinone), etc. Can be mentioned.

The amount of the hindered amine light stabilizer (HALS) added is preferably 0.01 to 5 parts by mass, more preferably 0.05 to 3 parts by mass, still more preferably 0, with respect to 100 parts by mass of the thermoplastic resin composition. It is 1 to 1 parts by mass.

(Antibacterial agent)
The thermoplastic resin composition of the present embodiment may contain an antibacterial agent. The antibacterial agent is not particularly limited, but for example, antibacterial metals such as zinc oxide, silver, copper, and zinc can be used as crystalline aluminosilicates, amorphous aluminosilicates, silica gel, activated alumina, and ceramics. Examples thereof include inorganic antibacterial agents supported on soil, activated carbon, zirconium phosphate, hydroxyapatite, magnesium oxide, magnesium perchlorate, glass and the like. Zinc oxide is preferable as the antibacterial metal.

Zinc oxide is not particularly limited and may be commercially available. For example, metallic zinc is heated and vaporized and burned in air, or zinc sulfate or zinc nitrate is heated. It may be prepared by Further, as the zinc oxide, for example, various shapes such as fibrous, plate-shaped, particle-shaped, and tetrapod-shaped can be used. The zinc oxide used in this embodiment may be surface-treated with silicon oxide, silicone oil, an organosilicon compound, an organotitanium compound, or the like.

Examples of commercially available zinc oxide include "type 1 zinc oxide", "type 2 zinc oxide", and "type 3 zinc oxide" classified by JIS K-1410, and the Japanese Pharmacopoeia. Examples thereof include zinc oxide and anisotropic (columnar, plate-shaped, tetrapot-shaped) zinc oxide (zinc oxide having shape anisotropy) prepared through a hydrothermal synthesis step. Of these zinc oxides, particulate zinc oxide having an average particle size of 50 to 200 nm is preferable, and particulate zinc oxide having an average particle size of 100 to 150 nm is particularly preferable. The average particle size referred to here is a particle size in which the integrated mass distribution is 50% in the particle size distribution obtained by measuring with a laser diffraction / scattering type particle size distribution measuring device.

The blending amount of zinc oxide is preferably 0.01 to 1 part by mass, more preferably 0.05 to 0.5 part by mass, and further preferably 0.1 to 0 with respect to 100 parts by mass of the thermoplastic resin composition. .3 parts by mass.

(Inorganic filler)
The thermoplastic resin composition of the present embodiment may contain an inorganic filler as a reinforced filler for the purpose of imparting rigidity and improving strength.

Examples of the inorganic filler include talc, wallastnite, mica, clay, montmon lilonite, smectite, kaolin, calcium carbonate, glass fiber, glass bead, glass balloon, glass milled fiber, glass flake, carbon fiber, and carbon flake. , Carbon beads, carbon milled fiber, metal flakes, metal fiber, metal coated glass fiber, metal coated carbon fiber, metal coated glass flakes, silica, ceramic particles, ceramic fiber, ceramic balloon, aramid particles, aramid fiber, polyarylate fiber, Examples thereof include various whiskers such as graphite, potassium titanate whiskers, aluminum borate whiskers, and basic magnesium sulfate. Of these, silicate-based fillers such as talc, wallastnite, mica, glass fiber, and glass milled fiber are preferably used. Of these, talc, wallastnite and mica are particularly preferred.

When an inorganic filler is blended, the thermoplastic resin composition of the present embodiment contains an additive containing an acidic group such as a carboxylic acid anhydride group or a sulfonic acid group in order to improve the wettability of the inorganic filler. Can be included.

The content of the inorganic filler in the present embodiment is preferably 0.1 to 30 parts by mass, more preferably 0.5 to 20 parts by mass, and further preferably 1 to 1 part by mass with respect to 100 parts by mass of the thermoplastic resin composition. It is 10 parts by mass. If the blending amount is less than 0.1 parts by mass, there is no reinforcing effect of the filler, and if it exceeds 30 parts by mass, the impact strength is remarkably lowered, which is not preferable.

(Other optional ingredients)
Other optional components that can be used in this embodiment include dyes, pigments, antifoaming agents, plasticizers, lubricants, mold release agents, flame retardants, and the like for coloring. Further, it is also possible to blend a thermoplastic resin other than the olefin resin (A) and the hydrophilic copolymer (B) within a range that does not impair the object of the present embodiment.

As such a thermoplastic resin, a thermoplastic resin used in home appliances and OA equipment can be used as a general-purpose resin.

Examples of such a thermoplastic resin include
Polyolefin resins (high density polyethylene, low density polyethylene, polypropylene, etc.), cyclic olefin resins, and polyester resins (polylactic acid, polyethylene terephthalate, polybutylene terephthalate, etc.), which are olefin resins,
Polystyrene (PS resin), acrylonitrile butadiene styrene (ABS resin), and acrylonitrile styrene (AS resin), which are styrene-based resins,
ASA resin made by polymerizing acrylic rubber instead of ABS resin butadiene,
AES resin obtained by polymerizing ethylene-based rubber instead of ABS resin butadiene,
Examples thereof include methyl methacrylate butadiene styrene (MBS resin).

Examples of other general-purpose resins include polyvinyl chloride resins (polyvinyl chloride, polyvinylidene chloride, etc.), polymethylmethacrylate resins, polyvinyl alcohols, polyethylene terephthalate (PET resin), and polybutylene terephthalate (PBT resin). ..

Further, as examples of engineering plastics having particularly excellent strength and enhanced functions such as heat resistance, polycarbonate resins (BPA type polycarbonate, aliphatic polycarbonate, etc.), polyamide resins, polyphenylene ether resins (PPE resins), etc. Examples thereof include polyoxymethylene resin (polyacetal and the like), polyphenylene sulfide resin, polyetherimide resin, aromatic polyether ketone resin, polysulfone resin, polyamideimide resin and the like.

These resins may be used alone or in combination of a plurality of resins as raw materials for the thermoplastic resin composition of the present embodiment. The plurality of resins are polymer alloys such as PC / ABS and PC / AS. Such polymer alloys have the features of both polycarbonate (PC resin) and styrene resin (ABS resin, AS resin, etc.), and are used for electrical / electronic related products, OA equipment, lighting equipment, precision machinery, automobile parts, etc. Used in a wide range of fields such as household products.

Since the molecular weight of the fatty acid metal salt (C) is lower than that of the resin (A) and the hydrophilic copolymer (B) having a polyoxyethylene chain, the fatty acid metal salt (C) can be used as a raw material regardless of which resin is used as the raw material. Is easily exposed on the surface of the molded product, so that various resins can be blended into the thermoplastic resin composition.

In addition, referring to FIG. 6, the fatty acid metal salt (C) and the hydrophilic copolymer (B) have different melt viscosities at the time of molding. At the time of molding, the resin (A) injected into the mold first solidifies, then the hydrophilic copolymer (B) solidifies, and then the fatty acid metal salt (C) having a low molecular weight solidifies. That is, the hydrophilic copolymer (B) and the fatty acid metal salt (C) have a slower solidification rate than the resin (A), and therefore tend to be easily exposed on the surface of the molded product. As described above, the hydrophilic copolymer (B) and the fatty acid metal salt (C) can be blended with the resin (A) because the melt viscosities at the time of molding are different from those of the resin (A).

On the other hand, for example, a resin raw material having a high melting point (for example, about 320 ° C. or higher) and an extremely high polarity is difficult to disperse, so that it is difficult to obtain a desired dust suppressing effect. That is, since the hydrophilic copolymer (B) and the fatty acid metal salt (C) are more likely to gather near the surface layer of the molded product than the above resin (A), the dust suppressing effect is more likely to be exhibited.

On the contrary, if the resin raw material has a high melting point of about 320 ° C. or higher and an extremely high polarity, it is difficult to disperse the resin raw material, so that it is difficult to obtain the desired dust suppressing effect.

That is, since the hydrophilic copolymer (B) and the fatty acid metal salt (C) are more likely to gather near the surface layer than the inside of the molded product than the above resin (A), the dust suppressing effect is likely to be exhibited.

Further, the polar group of the low molecular weight fatty acid metal salt (C) and the hydrophilic copolymer (B) having a polyoxyethylene chain have an affinity. Therefore, when the hydrophilic copolymer (B) adheres to the fatty acid metal salt (C), the hydrophilic copolymer (B) and the fatty acid metal salt (C) are prevented from being desorbed, and a large amount is present near the surface layer of the molded product. Can exist in. Therefore, the adhesion suppressing effect is likely to be exhibited against both hydrophilic and hydrophobic dust stains.

<Manufacturing of thermoplastic resin composition>
Any method is adopted for producing the thermoplastic resin composition of the present embodiment. For example, olefin resin (A), hydrophilic copolymer (B), fatty acid metal salt (C) and optionally other additives, premixing means such as V-type blender, Henschel mixer, mechanochemical device, extrusion mixer, etc. After sufficiently mixing using the mixture, if necessary, granulate the premixed mixture using an extrusion granulator or a briquetting machine, and then melt-knead with a melt-kneader typified by a bent twin-screw extruder. After that, a method of pelletizing with a pelletizer can be mentioned.

In addition, each component is independently supplied to a melt kneader represented by a bent twin-screw extruder, or a part of each component is premixed and then supplied to the melt kneader independently of the remaining components. There is also a way to do it. Examples of the method of premixing a part of each component include a method of premixing a component other than the olefin resin (A) in advance and then mixing the component with the olefin resin (A) or directly supplying the component to the extruder.

As the extruder, a extruder having a vent capable of degassing water in the raw material and volatile gas generated from the melt-kneaded resin can be preferably used. A vacuum pump is preferably installed from the vent to efficiently discharge the generated water and volatile gas to the outside of the extruder. It is also possible to install a screen for removing foreign substances and the like mixed in the extruded raw material in the zone in front of the die portion of the extruder to remove the foreign substances from the resin composition. Examples of such a screen include a wire mesh, a screen changer, a sintered metal plate (disc filter, etc.) and the like.

Examples of the melt kneader include a Banbury mixer, a kneading roll, a single-screw extruder, and a multi-screw extruder having three or more shafts, in addition to the twin-screw extruder.

The thermoplastic resin composition extruded as described above is either directly cut and pelletized, or the strands are cut and pelletized with a pelletizer after forming the strands. The shape of the pellet is preferably a cylinder. The diameter of such a cylinder is preferably 1 to 5 mm, more preferably 1.5 to 4 mm, still more preferably 2 to 3.3 mm. On the other hand, the length of the cylinder is preferably 1 to 30 mm, more preferably 2 to 5 mm, still more preferably 2.5 to 3.5 mm.

In the thermoplastic resin composition of the present embodiment, various products can be produced by injection-molding the pellets produced as described above to obtain a molded product. In such injection molding, not only ordinary molding methods, but also injection compression molding, injection press molding, gas-assisted injection molding, foam molding (including a method of injecting a supercritical fluid), insert molding, in-mold coating molding, and heat insulation. Mold molding, rapid heating and cooling mold molding, two-color molding, sandwich molding, ultra-high speed injection molding and the like can be mentioned. Further, either a cold runner method or a hot runner method can be selected for molding.

Further, the thermoplastic resin composition of the present embodiment can also be used in the form of various deformed extruded products, sheets, films and the like by extrusion molding. Inflation method, calendar method, casting method, etc. can also be used for forming sheets and films. It is also possible to form a heat-shrinkable tube by further applying a stretching operation. Further, the thermoplastic resin composition of the present embodiment can be made into a molded product by rotary molding, blow molding or the like.

Embodiment 2.
The molded product according to the present embodiment comprises the above-mentioned thermoplastic resin composition. The molded product according to the present embodiment has the effect of suppressing the adhesion of both hydrophilic dust stains and hydrophobic dust stains by being composed of the above-mentioned thermoplastic resin composition.

In the molded product according to the present embodiment, the concentration of the fatty acid metal salt (C) (content in the thermoplastic resin composition) near the surface of the molded product (the portion from the surface to a certain depth) is the molded product. It is preferable that the concentration is higher than the concentration of the fatty acid metal salt (C) in the inside (a portion deeper than a certain depth from the surface). Specifically, for example, the concentration of the fatty acid metal salt (C) in the portion within 10 nm from the surface of the molded product may be higher than the concentration of the fatty acid metal salt (C) in the portion deeper than 10 nm from the surface of the molded product. preferable.

Such a difference in the concentration of the fatty acid metal salt (C) in the depth direction of the molded product is, for example, in the molded product in a state where the surface of the molded product is scraped with Ar ions to each depth. It can be confirmed by performing elemental analysis of the metal element M (measurement of the area ratio of the metal element M) on the surface using X-ray photoelectron spectroscopy (XPS) (see FIG. 2).

For example, as shown in FIG. 1, the concentration of the fatty acid metal salt (C) (area ratio of the metal element M) at each depth is measured for a portion within 10 nm from the surface of the molded product (measurement depth A). Then, find the highest concentration among them. On the other hand, the concentration of the fatty acid metal salt (C) is measured at a depth (L / 2: measurement depth B) of half the thickness L of the molded product shown by the dotted line in FIG. By comparing the measured values of these concentrations, it is possible to confirm the difference in the concentration of the fatty acid metal salt (C) in the depth direction of the molded product.

For example, in a sample (test piece) of a molded product having an antifouling effect on both sexes, which will be described later in the examples, the concentration of the fatty acid metal salt (C) within 10 nm from the surface is 10 nm from the surface of the molded product. It was more than twice the concentration of the fatty acid metal salt (C) in the deep part. In a specific example, the concentration of the fatty acid metal salt (C) in the portion within 10 nm from the surface is a maximum of 3.2% by mass, and the concentration of the fatty acid metal salt (C) in the portion deeper than 10 nm from the surface of the molded product. The concentration was about 0.3% by mass to 0.6% by mass, and the former was about 5 to 10 times the latter.

In the fatty acid metal salt (C), the R portion is a non-polar group and the remaining portion is a polar group. During molding, it is considered that the fatty acid metal salt (C) is aligned with the polar group attached to the mold and the non-polar group directed toward the inside of the thermoplastic resin composition. Further, after molding, other fatty acid metal salts (C) melted inside the thermoplastic resin composition are transferred to the surface.

Further, since the fatty acid metal salt (C) has low compatibility with the resin, if it is blended in an amount equal to or higher than the critical solubility (concentration), it is diffused on the surface of the thermoplastic resin composition (molded article). In the vicinity of the surface of the thermoplastic resin composition, a plurality of fatty acid metal salts (C) are bonded to each other with their polar groups, and the hydrophobic groups R, which are non-polar groups, are arranged on the outside (air side) of the molded product. Conceivable.

Therefore, in the vicinity of the surface of the molded product, the concentration of the fatty acid metal salt (C) in the thermoplastic resin composition is higher than that inside the molded product, and the surface of the molded product to which dust stains adhere is efficiently surfaced. It is possible to reduce energy and obtain water and oil repellent effects. As a result, unlike the case where the fatty acid metal salt (C) is used as a lubricant, a mold release agent, etc., which are generally used, a new effect of suppressing the adhesion of hydrophobic dust stains on the surface of the molded product is obtained. can get.

Embodiment 3.
The product of the present embodiment includes the above-mentioned molded product. That is, the above-mentioned molded product is used, for example, as a resin part (internal part, housing, etc.) of a product such as a home electric appliance or an OA device. By providing the above-mentioned molded product, the product of the present embodiment has the effect of improving cleanliness and reducing the frequency of maintenance.

Products include, for example, personal computers, laptop computers, CRT displays, printers, mobile terminals, mobile phones, copiers, fax machines, recording medium (CD, CD-ROM, DVD, PD, FDD, etc.) drives, parabolic antennas, electric tools. , VTR, TV, iron, hair dryer, rice cooker, microwave oven, audio equipment, audio equipment (audio, laser disc (registered trademark), compact disc, etc.), lighting equipment (LED), remote control, ventilation fan, range hood, refrigerator , Air conditioners (air conditioners, dehumidifiers, humidifiers, etc.), air purifiers, vacuum cleaners, rice cookers, cooking heaters, bath products, toilet products, jet towels, electric fans, typewriters, word processors, automobiles, vehicles Equipment (car navigation, car stereo, etc.), miscellaneous goods, etc. can be mentioned.

Further, for example, if the above molded products are applied to resin parts such as air conditioners, doors, display devices, insulators, mirrors, measuring instruments, and operation parts of various devices, the adhesion of dust stains is reduced and cleanliness is reduced. Can be improved and maintenance frequency can be reduced. In particular, the above-mentioned molded product is useful as a resin part of a product that cannot be maintained by a user or a trader for a long period of time.

The molded product made of the above-mentioned thermoplastic resin composition of the present embodiment can be applied as long as the product is provided with resin parts, and can be widely applied not only to the above-mentioned applications.

Further, since the antifouling effect can be easily obtained only by molding, there is an advantage that complicated processes such as moving and applying the molded product are overwhelmingly less than those of painting or coating having an antifouling effect. Therefore, the molded product made of the above-mentioned thermoplastic resin composition is suitable for mass production of products and has extremely high practicality. Further, the molded product made of the above-mentioned thermoplastic resin composition is applied as an exterior member without worrying about uneven coating, rainbow pattern, glossiness, etc. on the surface as compared with coatings and coatings having an antifouling effect. Due to its easy advantage, it is suitable for mass production of products and is extremely practical.

FIG. 5 is a schematic cross-sectional view of the air conditioner according to the present embodiment. As shown in FIG. 5, the main body case 10 of the indoor unit of the air conditioner is formed in a horizontally long substantially rectangular parallelepiped shape, an air suction port 11 is provided on the upper surface thereof, and an air outlet 12 is provided on the lower surface thereof. Is provided. A pre-filter 17 is provided from the downstream side of the air suction port 11 to the front side of the main body case 10. Further, a front panel 14 that covers the front surface of the main body case 10 is provided.

Inside the main body case 10, a fan 13 for sucking indoor air sucked from the air suction port 11 into the room from the air outlet 12 is provided. A heat exchanger 22 is arranged on the upstream side of the fan 13, and an air passage 21 is provided on the downstream side of the fan 13, and air passes through the air passage 21. A drain pan 18 is provided under the heat exchanger 22.

Although not shown, a fan motor for driving the fan 13, a control unit for controlling the operation of the air conditioner, and the like are provided in the main body case 10.

The vertical wind direction plates 15 and 16 adjust the vertical blowing angle of the air blown from the air outlet 12. The left and right wind direction plates 19 adjust the blowing angle of the air blown from the air outlet 12 in the left-right direction. Support shafts are provided at the ends of the upper and lower wind direction plates 15 and 16, respectively, and are rotatably and detachably supported by bearings provided on the side wall of the air outlet 12, and the left and right wind direction plates 19 are fixed. In some cases, the direction can be set manually, and in other cases, it can be driven by a motor to automatically rotate in the left-right direction.

When the fan 13 is driven, indoor air is sucked from the air suction port 11, and the pre-filter 17, heat exchanger 22, fan 13, air passage 21, air outlet 12, left and right air direction plates 19, vertical air direction plates 15, 16 The wind blows into the room as it passes through in order. Since hydrophilic dust stains such as dust, dust, and fibers, and hydrophobic dust stains such as oil smoke, soot, sebum, and tobacco come into contact with various air conditioner members together with the air, the air suction port 11, The pre-filter 17, heat exchanger 22, fan 13, air passage 21, air outlet 12, left and right wind direction plates 19, and vertical air direction plates 15 and 16 are constantly soiled. Further, since the sucked air also contacts the back wall 20 facing the pre-filter 17 of the front panel 14, the back wall 20 also continues to be polluted.

A styrene resin such as PS or ABS may be used as a constituent material of the front panel 14, the air outlet 12, the left and right wind direction plates 19, the vertical wind direction plates 15, 16, the air passage 21, and the back wall 20. There are many. An olefin resin such as polypropylene (PP) is often used as a constituent material for the frame of the prefilter 17. As a constituent material of the fan 13, an olefin resin such as PP or a styrene resin such as AS is often used.

A molded product made of the above-mentioned thermoplastic resin composition can be preferably used for a product such as an air conditioner that is constantly contaminated.

As an effect when the molded product made of the above-mentioned thermoplastic resin composition is applied to the air conditioner, it is possible to reduce the dirt on the members, so that improvement in cleanliness and reduction in maintenance frequency can be expected. Further, since the dirt is not re-scattered, the discomfort caused when the odor caused by the dirt reaches with the wind is reduced. In addition, it is possible to suppress the generation of mold that nourishes the attached dirt. In addition, products installed at a high position on the ceiling, such as air conditioners, need to be cleaned by the user using a stepladder or the like, which makes cleaning difficult. However, due to the application of the above molded products, the frequency of cleaning is high. Can be lowered, which is particularly preferable for elderly people.

In addition, if dirt accumulates in the gaps of the fan 13 and fills the gaps, or if dirt accumulates on the surfaces of various air passages and the air passage is narrowed, the cooling and heating capacity decreases due to the decrease in air volume. However, there is a problem that the power consumption of the fan increases, but by suppressing the dirt by applying the above-mentioned molded product, the air volume at the initial stage of purchase can be maintained and the increase in power consumption can be suppressed.

In addition, for example, styrene-based resins such as ABS and PS or olefin-based resins such as PP are often used for vegetable trays in refrigerators. For the dust box of a vacuum cleaner, a styrene resin such as ABS or PS or an olefin resin such as PP is often used. Olefin resins such as PP are often used for sirocco fans of various ventilation fans and fans of electric fans. By reducing dirt in both cases, maintenance work can be reduced.

<Evaluation method>
(1) Tensile strength The tensile strength (tensile yield strength) was measured according to ISO 527-1 and ISO 527-1. The measured values were compared with the tensile strength of the olefin resin (component A) alone, and evaluated based on the following criteria.

[Evaluation criteria for tensile strength]
A: Retention rate is 95% or more, B: Retention rate is less than 95%, 90% or more, C: Retention rate is less than 90%, 85% or more, D: Less than 85%

(2) Flexural modulus The flexural modulus was measured according to ISO 178 (test piece dimensions: length 80 mm × width 10 mm × thickness 4 mm). The measured values were compared with the flexural modulus of the olefin resin (component A) and evaluated based on the following criteria.

[Evaluation criteria for flexural modulus]
A: Retention rate is 95% or more, B: Retention rate is less than 95%, 90% or more, C: Retention rate is less than 90%, 85% or more, D: Less than 85%

(3) Charpy impact strength The notched Charpy impact strength was measured according to ISO 179.

(4) Surface impact strength A square plate of 150 mm × 150 mm × 2 mm (thickness) was molded using an injection molding machine, a high-speed surface impact test was performed at N = 5, and the surface impact strength (destructive energy) was measured. , The average value of N = 5 was calculated. In addition, the fracture form was evaluated based on the following criteria.

[Evaluation criteria for fracture form]
A: Longitudinal fracture, B: Mixing of ductile fracture and brittle fracture (progressive fracture number> brittle fracture number), C: Mixing of ductile fracture and brittle fracture (brittle fracture number) > Permanent fracture number), D: Brittle fracture

In the evaluation of the fracture form, the test piece does not crack and scatter after the impact test, and the striking core penetrating portion shows a form in which the striking core penetrates uniformly and remains. A brittle fracture was defined as a fracture in which the test piece broke due to its shape, etc., and the end face of the penetration portion was sharp while the strike core penetration portion was flat. As for the fracture form, a ductile fracture form is preferable to a brittle fracture form.

A high-speed surface impact tester Hydroshot HTM-1 (manufactured by Shimadzu Corporation) was used as the testing machine. As the test conditions, the collision speed of the striking core was 7 m / sec, a striking core having a semicircular tip and a radius of 6.35 mm was used, and the pedestal hole diameter was 25.4 mm.

(5) Deflection temperature under load The deflection temperature under load was measured according to ISO 75-1 and 75-2. The measured load was 1.80 MPa.

(6) Evaluation of Dust Adhesion A 150 mm × 150 mm × 2 mm (thickness) square plate is prepared and left in an environment of 23 ° C. and 50% humidity for one week, and then a dust adhesion test is carried out on the square plate. did. Kanto loam (11 types of JIS test powder) was used for the evaluation of hydrophilic dust adhesion, and carbon black (12 types of JIS test powder) was used for the evaluation of hydrophobic dust adhesion.
To evaluate the adhesion of dust, after spraying a certain amount (5 g) of dust on the surface of the molded product with air, the surface of the molded product is observed at 100 times with a KEYENCE digital microscope VHX-5000, and dust adhered by image processing. The area ratio was calculated and evaluated based on the following criteria.

[Evaluation criteria for dust adhesion]
A: Dust adhesion area ratio is less than 3%, B: Dust adhesion area ratio is less than 3 to 6%, C: Dust adhesion area ratio is less than 6 to 9%, D: Dust adhesion area ratio is 9% or more

[Examples 1-33, Comparative Examples 1-33]
Tables 1 to 4 show 100 parts by mass of A to C components (total amount of A to C components), mold release agent [manufactured by RIKEN Vitamin Co., Ltd .: Riquester EW400 (product name)] 0.3 parts by mass, phosphorus-based heat Stabilizer [IRGAFOS168 (product name) manufactured by BASF] 0.1 part by mass, phenol-based heat stabilizer [BASF; IRGANOX1076 (product name)] 0.1 part by mass, hindered amine-based photostabilizer [ADEKA ADEKA Co., Ltd. LA-57 (product name)] 0.2 parts by mass and bendtriazole-based ultraviolet absorber [SEESORB701 (product name) manufactured by Cipro Chemical Co., Ltd.] 0.1 parts by mass are mixed with a V-type blender to mix the mixture. Obtained.

The obtained mixture was supplied from the first supply port of the extruder. The supply amount of the raw material (mixture) was precisely measured by a measuring instrument [CWF manufactured by Kubota Co., Ltd.]. A vent type twin-screw extruder with a diameter of 30 mm (TEX30α-38.5BW-3V, Japan Steel Works, Ltd.) is used to extrude the raw material, the screw rotation speed is 200 rpm, the discharge rate is 20 kg / h, and the vent vacuum is used. The raw materials were melt-kneaded under the condition of 3 kPa to obtain pellets of the thermoplastic resin composition. Regarding the extrusion temperature, the temperature from the first supply port to the die portion was set to 220 ° C.

A part of the obtained pellets is dried by a hot air circulation type dryer at 80 ° C. for 4 hours, and then a test piece for evaluation (Examples 1 to 33) using an injection molding machine (FANUC Co., Ltd. T-150D). And as Comparative Examples 1-33). The basic conditions for injection molding were a cylinder temperature of 200 ° C., a mold temperature of 50 ° C., and an injection speed of 20 mm / s.

The components A to C (each component of the symbol notation) shown in Tables 1 to 4 are as follows.

[Component A]
(PP1)
Polypropylene (homopolymer) [Prime Polymer Co., Ltd., J137M, homopolypropylene containing crystal nucleating agent at a ratio of about 0.1%, MFR = 30 g / 10 minutes (230 ° C. / 2.16 kgf)]
(PP2)
Polypropylene (block copolymer) [Prime Polymer Co., Ltd., J830HV, copolymer form is block polymer, MFR = 30 g / 10 minutes (230 ° C / 2.16 kgf)]

[B component]
(PEPO-1)
Copolymer having a structure bonded alternately repeating a block of a polyolefin and a block of a hydrophilic polymer [manufactured by Sanyo Chemical Industries, Bae Rekutoron HS (trade name), a surface resistance value = 4 × 10 ⁵ Ω]
(PEPO-2)
Polyetheresteramide [manufactured by Sanyo Chemical Industries, Pelestat NC6321 (trade name), a surface resistivity = 1 × 10 ⁹ Ω]

[C component]
(StZn)
Zinc stearate [manufactured by NOF CORPORATION, zinc stearate (product name), metal content = 10.5-11.3%, free fatty acid = 0.5% or less]
(StAl-1)
Aluminum monostearic acid (dihydroxy) [manufactured by NOF CORPORATION, aluminum stearate 300 (product name), metal content = 10.0 to 11.5%, free fatty acid = 8.0% or less]
(StAl-2)
Aluminum distearate (hydroxy) [manufactured by NOF CORPORATION, aluminum stearate 600 (product name), metal content = 8.5 to 10.0%, free fatty acid = 12.0% or less]
(StAl-3)
Aluminum monostearate [manufactured by NOF CORPORATION, aluminum stearate 900 (product name), metal content = 6.5-8.0%, free fatty acid = 20-30%]

The evaluation results of (1) to (6) above for the obtained test pieces for evaluation (Examples 1 to 33 and Comparative Examples 1 to 33) are shown in Tables 1 to 4. However, the evaluation of (2) above was carried out only for Examples 1 to 19 and Comparative Examples 1 to 18, and the evaluations of (3) and (4) above were carried out for Examples 20 to 33 and Comparative Examples 19 to 19. It was carried out only for 33.

From the evaluation results shown in Tables 1 to 4, it is composed of a thermoplastic resin composition containing an olefin resin (A), a hydrophilic copolymer having a polyoxyethylene chain (B), and a fatty acid metal salt (C). In the example of the molded product, it can be confirmed that an excellent adhesion suppressing effect (antifouling effect) can be obtained against hydrophilic and hydrophobic dust stains.

Furthermore, it can be confirmed that good mechanical strength of the molded product can be obtained by adjusting the blending amount of each component.

Further, when aluminum distearate (hydroxy) is used as the fatty acid metal salt (C) (that is, when a metal salt containing two fatty acids is used when the valence of the metal element M is 3), Compared with the case of using zinc stearate, aluminum monostearate or aluminum tristearate, there is a tendency that the adhesion suppressing effect (antifouling effect) on both hydrophilic dust stains and hydrophobic dust stains is superior. ..

The embodiments and examples disclosed this time should be considered to be exemplary and not restrictive in all respects. The scope of the present invention is shown by the scope of claims rather than the above description, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

10 Main body case, 11 Air inlet, 12 Air outlet, 13 Fan, 14 Front panel, 15, 16 Vertical air direction plate, 17 Pre-filter, 18 Drain pan, 19 Left and right air direction plate, 20 Back wall, 21 Air passage, 22 Heat Exchanger.

Claims (9)

Olefin resin (A) and
Hydrophilic copolymer (B) having a polyoxyethylene chain and
A thermoplastic resin composition containing a fatty acid metal salt (C) represented by the following formula (1).

M (OH) y (R-COO) x ... (1)

(In formula (1), R is an alkyl group or an alkenyl group having 6 to 40 carbon atoms. M is at least one metal selected from the group consisting of aluminum, zinc, calcium, magnesium, lithium and barium. It is an element. X and y are independent integers of 0 or more, and satisfy the relationship of x + y = [valence of M].) The first aspect of the present invention, which contains 100 parts by mass of the olefin resin (A), 1 to 20 parts by mass of the hydrophilic copolymer (B), and 0.6 to 10 parts by mass of the fatty acid metal salt (C). The thermoplastic resin composition according to the above. The thermoplastic resin composition according to claim 1 or 2, wherein the hydrophilic copolymer (B) is a hydrophilic copolymer (B1) in which a polyolefin and a hydrophilic polymer having a polyoxyethylene chain are repeatedly and alternately bonded. Stuff. The thermoplastic resin composition according to any one of claims 1 to 3, wherein the surface resistance value of the hydrophilic copolymer (B) is 1 × 10 ⁴ to 1 × 10 ⁷ Ω. The thermoplastic resin composition according to any one of claims 1 to 4, wherein in the formula (1), M is at least one metal element selected from aluminum and zinc. The thermoplastic resin composition according to claim 5, wherein M is aluminum in the formula (1). The thermoplastic resin composition according to claim 6, wherein y = 1 in the formula (1). A molded product comprising the thermoplastic resin composition according to any one of claims 1 to 7. A product comprising the molded product according to claim 8.

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