JP2000095902A - Polypropylene-based resin composition and film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a polypropylene-based resin compsn. from which a flexible film excellent in antiblocking property, antistatic property, transparency and gloss can be obtd., and a film therefrom. SOLUTION: This polypropylene-based resin compsn. comprises 100 pts.wt. of a polypropylene-based resin (A), 2-10 pts.wt. of a vinyl arom. elastomer (B), 0.03-0.5 pt.wt. of spherical resin particulates (C) having an average particle size of 0.5-8 μm and a sphericity f of 0.8 or more, the f being expressed by f=[M/(π/4)]0.5/Nmax wherein M is an arbitrarily chosen cross-sectional area of a particulate (mm2), and the Nmax is the largest diameter of the cross-section (mm)], 0.03-0.4 pt.wt. of a higher fatty acid amide (D), 0.05-1.5 pts.wt. of a partial ester of an aliph. monocarboxylic acid with a tetra- to hexahydric polyol (E), and 0.005-0.1 pt.wt. of a crystal nucleating agent (F).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a polypropylene resin composition and a film produced from the composition.

[0002]

2. Description of the Related Art Polyolefin resin films are widely used as packaging films because of their easy workability and low cost. However, when a polyolefin-based resin is processed into a film, the film is liable to cause blocking, which may impair workability during film forming and high-order processing. In addition, when the film is used, for example, for packing or wrapping, troubles such as poor opening of the bag are likely to occur. In addition, since the polyolefin resin is hydrophobic, it has a strong chargeability, and a single-layer or multi-layer film formed from the resin is likely to cause a problem such as dust adhesion during the processing step or use.

[0003] In order to solve such disadvantages, there has been proposed a method for improving the slipperiness of a film by blending fine particles of silicic anhydride, kaolinite, zeolite or the like with a polyolefin resin. In addition, Japanese Patent Publication No. 5-28262 and Japanese Patent Publication No.
Japanese Patent Application Laid-Open No. 11550 and Japanese Patent Application Laid-Open No. Hei 7-258487 propose that a non-melting silicone resin is blended with a polypropylene polymer.

[0004] However, such a film to which only the non-melting type silicone resin fine particles are added has a certain effect in terms of blocking resistance, but in terms of the slipperiness of the film, it has been required to increase the speed of recent packaging. There is almost no effect in the machine, and in order to obtain a sufficient effect, a large amount of the fine particles must be added, and there is a disadvantage that the transparency is significantly impaired. Furthermore, when these non-melting silicone resins are blended with a polypropylene polymer, the former has a problem that the refractive index is significantly different from the latter refractive index of 1.5, so that the transparency is impaired.

Japanese Patent Application Laid-Open No. 7-138415 proposes a composition in which a silicone-based graft polymer is blended with a polyolefin-based resin, but depending on the shape, particle size, and refractive index of the silicone-based graft polymer. Transparency and slipperiness may decrease. Further, this composition is also unsuitable for a film which requires a high degree of transparency, since transparency is reduced by the blending of the polymer.

Japanese Patent Application Laid-Open No. 9-165519 discloses that 100 parts by weight of a thermoplastic resin has an average particle size of 0.1 to 2 parts by weight.
Although 0.1 to 10 parts by weight of 0 μm crosslinkable spherical fine particles are blended, when the blending amount in this range is used, the use of crosslinked spherical fine particles having an average particle diameter of more than 10 μm causes a significant decrease in transparency. Even with particles having the following particle sizes, a decrease in transparency due to a large dividend as described above was inevitable. Further, bags made from these films have a problem that the coefficient of kinetic friction is still too large and the opening of the bags is not sufficient.

Japanese Patent Application Laid-Open No. Hei 7-290649 proposes a laminated film in which a random polypropylene layer is laminated on both sides of an intermediate layer composed of random polypropylene and a hydrogenated diene copolymer. It is difficult to control and it is necessary to add a large amount of a hydrogenated diene copolymer in order to impart flexibility. Further, there is a drawback that when the flexibility is improved, the transparency and the gloss are reduced.

There is a method of kneading a known cationic or anionic surfactant as a kneading type antistatic agent into a polyolefin resin in order to prevent the film from being charged. However, when the surfactant is kneaded, the obtained film is inferior in heat resistance, and the appearance quality is deteriorated due to coloring. As a way to overcome this,
JP-A-8-59852 proposes a method in which spherical organic fine particles are combined with a specific amide and blended into a polyolefin resin. However, even if such a combination alone can provide an antistatic effect, bags made from this film have the same kinetic friction coefficient as described above, and the opening of the bags is not sufficient. There was a problem that the durability of the prevention performance was poor.

[0009]

SUMMARY OF THE INVENTION In view of the above-mentioned disadvantages, an object of the present invention is to provide a polypropylene resin composition capable of obtaining a flexible film having excellent blocking resistance, antistatic properties, transparency and gloss. And to provide a film obtained therefrom.

[0010]

The polypropylene resin composition of the present invention comprises 100 parts by weight of a polypropylene resin (A), 2 to 10 parts by weight of a vinyl aromatic elastomer (B),
The average particle diameter is 0.5 to 8 μm, and f = [M / (π / 4)] ^0.5 / Nmax (where M is an arbitrary cross-sectional area mm ² of the fine particles, Nmax
Represents the longest diameter mm of the section. A) spherical resin fine particles (C) having a sphericity f of 0.8 or more
03 to 0.5 parts by weight, higher fatty acid amide (D) 0.03 to
0.4 part by weight, consisting of 0.05 to 1.5 parts by weight of an aliphatic monocarboxylic acid partial ester of a 4- to 6-valent polyol (E) and 0.005 to 0.1 parts by weight of a crystal nucleating agent (F) Things.

The polypropylene resin used in the present invention
As (A), a commercially available propylene resin can be generally used, and copolymerization of ethylene is preferable because of excellent flexibility, transparency, etc., and particularly, copolymerization of 3% by weight or more is preferred. It is preferably polymerized.

The vinyl aromatic elastomer used in the present invention is obtained by copolymerizing a vinyl aromatic compound (G) and a conjugated diene (H) with G- (HG) _m (m is 1 or more). A block copolymer or a random copolymer represented by (GH represents an integer greater than or equal to 1) or (GH) _n (n represents an integer of 1 or more), or a hydrogenated product of these copolymers. HG and GH copolymers are preferred.

The vinyl aromatic compound includes, for example, styrene, t-butyl styrene, α-methyl styrene, p-methyl styrene, 1,1-diphenyl styrene and the like, and styrene and α-methyl styrene are preferred. Examples of the conjugated diene include 1,3-butadiene, isoprene, 2,3-dimethyl-1,3-butadiene, 1,3-pentadiene, and 2-methyl-1,3-
Examples thereof include pentadiene, 1,3-hexadiene, 4,5-diethyl-1,3-octadiene, 3-butyl-1,3-octadiene, and chloroprene, and 1,3-butadiene and isoprene are preferred.

As the vinyl aromatic elastomer, a styrene-butadiene random copolymer, a styrene-isoprene-styrene block copolymer and a hydrogenated product thereof are preferable. As the hydrogenated product of the styrene-isoprene-styrene block copolymer, a styrene-ethylene-propylene-styrene copolymer and a hydrogenated styrene-isoprene-styrene block copolymer having 3,4 isoprene bonds are particularly preferable.

The amount of the vinyl aromatic elastomer added is
When the amount decreases, the flexibility decreases and the spherulites are easily formed, so the transparency tends to decrease.When the amount increases, the slipperiness and the transparency decrease, so the polypropylene resin (A)
2 to 10 parts by weight, preferably 3 to 10 parts by weight per 100 parts by weight
5 parts by weight.

The spherical resin fine particles (C) used in the present invention
Has an average particle size of 0.5 to 8 μm, and f = [M / (π / 4)] ^0.5 / Nmax (where M is an arbitrary cross-sectional area mm ² of the fine particles, Nmax
Represents the longest diameter mm of the section. ) Are spherical resin fine particles having a sphericity f of 0.8 or more.

When the average particle size of the spherical resin fine particles (C) is small, the slipperiness is reduced, and when the average particle size is large, the transparency is reduced. Therefore, the average particle size is limited to 0.5 to 8 μm, and preferably 1.5 to 8 μm.
３3 μm.

The spherical resin fine particles (C) are excellent in the form of true spheres for imparting effects such as good slipperiness and high transparency. In the sphericity f defined above, M is a cross-sectional area (mm ² ) when cut at an arbitrary angle including the center of the fine particles.
And Nmax represents the longest diameter (mm) in the cross section. The sphericity f is 0.8 or more, preferably 0.85 or more.

The resin forming the spherical resin fine particles (C) is not particularly limited, but those which are generally available, have excellent dispersibility in the polyolefin resin, and are close to the refractive index of the polyolefin resin are preferable. Resin, silicone rubber, polyamide, condensation type resin having a triazine ring, cross-linked polymethyl methacrylate, cross-linked polystyrene and the like.

Above all, when the sliding property is particularly important,
Silicone resin and silicone rubber are preferable, and when transparency is important, cross-linked polymethyl methacrylate and silicone acrylic copolymer are preferable.

Particularly, as spherical resin fine particles (C) capable of achieving both slipperiness and transparency, an organopolysiloxane represented by the following general formula (I) and a non-crosslinkable radical polymerizable copolymerizable therewith What was obtained by copolymerizing a reactive monomer and a crosslinkable radical polymerizable monomer is preferable.

The refractive index of the spherical resin fine particles (C) is 1.45.
~ 1.52 is preferred. If the refractive index is outside the above range,
Since there is too much difference in the refractive index between the polyolefin-based resin (A) and the spherical resin fine particles (C), high transparency may not be obtained. The more preferable range of the refractive index of the spherical resin fine particles (C) is from 1.48 to 1.50.

[0023]

Embedded image The groups R in the general formula (I) are the same or different from each other;
It is a substituted or unsubstituted monovalent hydrocarbon group having 1 to 12 carbon atoms. Examples of such R include, for example, methyl group, ethyl group, propyl group, isopropyl group, n-butyl group, n
An alkyl group such as a hexyl group; a phenyl group, a tolyl group,
Aryl groups such as naphthyl group; alkenyl groups such as vinyl group and allyl group; aralkyl groups such as phenethyl group and benzyl group; substituted alkyl groups such as 3-chloropropyl group and 3,3,3-trifluoropropyl group. . Of these, methyl, butyl, and phenyl groups are particularly preferred,
In order to provide sufficient slip and blocking resistance, all R
50 mol% or more of the inside is a methyl group.

The group X in the general formula (I) represents a radical polymerizable functional group-containing organic group, and preferably a group represented by the general formula (II)

Embedded image (Wherein, R ¹ represents a divalent organic group having 3 to 20 carbon atoms which may contain a hetero atom, and R ² represents a hydrogen atom or a methyl group, respectively) or the general formula (III)

Embedded image Is a group represented by

In the above general formula (II), -R in the formula
^{As 1} -,-(CH ₂ ) _3- , -CH ₂ CH (CH
_{3) CH 2 -, - (} CH 2) 4 -, - (CH 2) 6 -,
— (CH ₂ ) ₃ O (CH ₂ ) ₂ —, — (CH ₂ ) ₃ —
(C ₂ H ₄ O) _2- and the like.

N in the general formula (I) is an integer of 5 to 200. If n is less than 5, the slipperiness decreases, and if it exceeds 200, the transparency decreases.

The non-crosslinkable radical polymerizable monomer copolymerizable with the organopolysiloxane represented by the general formula (I) includes, for example, methyl (meth) acrylate, ethyl (meth) acrylate, n-butyl ( Alkyl (meth) acrylates such as (meth) acrylate, 2-ethylhexyl (meth) acrylate, isobutyl (meth) acrylate, hexyl (meth) acrylate, octyl (meth) acrylate, lauryl (meth) acrylate, and stearyl (meth) acrylate; Examples include alkoxyalkyl (meth) acrylates such as methoxyethyl (meth) acrylate and butoxyethyl (meth) acrylate; cyclohexyl (meth) acrylate, phenyl (meth) acrylate, and benzyl (meth) acrylate. These (meth) acrylates may be used alone or in combination of two or more.

In addition, as long as the effects of the present invention are not impaired, radical polymerizable monomers other than those described above can be used in combination with the above (meth) acrylates. Such monomers include, for example, maleic acid, fumaric acid,
Unsaturated acids such as (meth) acrylic acid; (meth) acrylamides such as N-methylol (meth) acrylamide; 3-trimethoxysilylpropyl (meth) acrylate, 3-triethoxysilylpropyl (meth) acrylate, 3- Dimethoxymethylsilylpropyl (meth)
Radical polymerizable silane compounds such as acrylate, vinyltriethoxysilane, 4-vinylphenyltrimethoxysilane, and vinylmethyldimethoxysilane; styrene, acrylonitrile, vinylpyridine, vinylpyrrolidone,
Examples include vinyl alkyl ethers, radically polymerizable macromonomers of polyoxyalkylenes having one radically polymerizable group in the molecule, and polycaprolactone.

Examples of the crosslinkable radical polymerizable monomer copolymerizable with the organopolysiloxane represented by the general formula (I) include, for example, ethylene glycol di (meth)
Acrylate, diethylene glycol di (meth) acrylate, butanediol di (meth) acrylate, hexanediol di (meth) acrylate, allyl (meth)
Radical polymerizable monomers having two or more ethylenically unsaturated groups in one molecule such as acrylate, propylene glycol di (meth) acrylate, trimethylolpropane di (meth) acrylate, and divinylbenzene are exemplified.

In order to produce the above-mentioned spherical resin fine particles (C) which are compatible with both slipperiness and transparency, an organopolysiloxane represented by the above general formula (I) and a non-crosslinkable radical copolymerizable monomer can be used. A solution or a non-aqueous dispersion containing the copolymer obtained by solution polymerization of the monomer and the crosslinkable radical copolymerizable monomer, and drying the spherical fine particles by spray drying. A method of dehydrating and drying the copolymer fine particles obtained by turbid polymerization, a method of drying the copolymer obtained by emulsion polymerization of the above monomers by a spray drying method, or a method of slowly coagulating from the above emulsion reaction liquid. After washing and drying the slurry-like copolymer thus obtained, a method of obtaining spherical fine particles by crushing with a jet mill or the like, previously preparing crosslinked fine particles by suspension polymerization or emulsion polymerization of the copolymerizable monomer, This fine particle table After reacting the emulsion polymerization of the organopolysiloxane, and a method of taking out the particles dried.

In the copolymerization, the charged weight ratio of the organopolysiloxane represented by the above formula (I) / non-crosslinkable radical polymerizable monomer and crosslinkable radical polymerizable monomer is preferably (5 to 5). 70) / (95-30).

When the amount of the organopolysiloxane to the radical polymerizable monomer is reduced, the effect of imparting slipperiness is reduced, and when the amount is increased, fine particles having a refractive index in the range of 1.45 to 1.52 are obtained. It becomes difficult to be.

When the amount of the spherical resin fine particles (C) is small, the slipperiness is reduced. When the amount is large, the slipperiness and the blocking resistance are improved, but it is difficult to obtain high transparency. ) 0.03 to 0.5 part by weight, preferably 0.1 to 0.35 part per 100 parts by weight
Parts by weight.

The higher fatty acid amide (D) used in the present invention
Is a component blended for improving the slipperiness of the obtained film, for example, lauric amide, myristic amide, palmitic amide, stearic amide, behenic amide (C ₂₁ H ₄₃ CONH ₂ ), etc. Oleic amides, erucamides (C ₂₁ H)
₄₁ CONH ₂ ) and the like; unsaturated higher fatty acid amides such as methylenebisstearic acid amide and ethylenebisstearic acid amide; These higher fatty acid amides (D) may be used alone or in combination of two or more.

The higher fatty acid amide represented by Ra CONH ₂ is preferably a higher fatty acid amide in which the hydrocarbon group Ra has 16 to 24 carbon atoms, particularly preferably a monocarboxylic acid amide, and particularly, transparency and immediate action. In view of this, erucamide is most preferred.

If the amount of the higher fatty acid amide (D) is too small, the lubricity is not improved, and if it is too large, it bleeds out and lowers the transparency or adheres to a roll during film formation to obtain a higher fatty acid amide (D). The resulting film becomes contaminated, so that the amount is 0.03 to 0.4 parts by weight, preferably 0.1 to 0.3 parts by weight, per 100 parts by weight of the polypropylene resin (A).
5 parts by weight.

The aliphatic monocarboxylic acid partial ester (E) of the 4- to 6-valent polyol used in the present invention is for imparting an antistatic property, and comprises a 4- to 6-valent polyol and an aliphatic monocarboxylic acid. It is obtained by partial esterification with a carboxylic acid and has at least one free hydroxyl group in the molecule.

Examples of the above 4- to 6-valent polyol include polyhydric alcohols such as pentaerythritol, sorbitol and glucose; cyclic ether polyhydric alcohols obtained by dehydration of sorbitol such as sorbitan and sorbite; diglycerin, ethylene glycol diglycol Polyether tetraols such as glyceryl ether; polyether pentaols such as triglycerin; and polyether hexaols such as tetraglycerin and dipentaerythritol.

As the aliphatic monocarboxylic acid, an aliphatic monocarboxylic acid having 8 to 20 carbon atoms is preferable, and examples thereof include lauric acid, myristic acid, palmitic acid, and stearic acid.

Among such partial esters, those having 3 or 4 free hydroxyl groups and 1 or 2 aliphatic monocarboxylic acid ester groups in the molecule, for example, sorbitan monoester, diglycerin monoester, Preferred are triglycerin monoester, triglycerin diester, tetraglycerin diester and the like.

When a partial ester obtained from a divalent or trivalent polyol is used as a partial ester of an aliphatic monocarboxylic acid of a polyol, an antistatic effect may not be sufficiently exhibited, and a polyol having a valence of 7 or more may be used. When the partial ester obtained from the above is used, problems may occur in post-processing after film formation.

When the amount of the aliphatic monocarboxylic acid partial ester (E) of the 4- to 6-valent polyol is small, the antistatic effect cannot be obtained, and when the amount is large, the transparency decreases with time. It is 0.05 to 1.5 parts by weight, preferably 0.1 to 1 part by weight, based on 100 parts by weight of the polypropylene resin (A).

The crystal nucleating agent (F) used in the present invention may be any as long as it has a nucleating effect on the propylene resin.
Examples thereof include a metal salt of an organic carboxylic acid, a condensate of benzaldehyde or a ring-substituted product thereof and a polyhydric alcohol, a polymer nucleating agent, and the like.

Examples of the metal salt of the organic carboxylic acid include sodium and potassium salts of benzoic acid, para-t
Aluminum salts of -butylbenzoic acid. Examples of the condensate of the above benzaldehyde or a ring-substituted product thereof with a polyhydric alcohol include, for example, dibenzylidene sorbitol, dibenzylidene xylitol, dibenzylidene passitol, monobenzylidene sorbitol, dibenzylidene mannitol, 1,3-di (alkylbenzylidene) Sorbitol, 2,4-di (alkylbenzylidene) sorbitol, 1,3-di (alkoxybenzylidene) sorbitol, 2,4-di (alkoxybenzylidene) sorbitol, alkyl-substituted benzylidenesorbitol and the like.

Examples of the polymer nucleating agent include vinylcycloalkanes such as vinylcyclohexane and vinylcyclopentane, alkyl-substituted styrenes such as pt-butylstyrene and p-methylstyrene, and 3-methylbutene-1,4,4. 4-dimethylpentene-1,4,4-dimethylhexene-1,3,3-dimethylbutene-1,3-methylpentene-1,3-methylhexene-1,3,5
Examples thereof include polymers such as 5-trimethylhexene-1, indene, trialkylallylsilane, and vinylcycloalkene.

When the amount of the crystal nucleating agent (F) is small, the transparency and gloss are reduced, and when the amount is large, the rigidity is improved and the flexibility is reduced. Therefore, based on 100 parts by weight of the polypropylene resin (A). 0.005 to 0.1 parts by weight.

The polypropylene resin composition of the present invention further comprises a plasticizer,
Light stabilizers, antioxidants, coloring agents, processability improvers, antistatic agents, ultraviolet absorbers, and the like may be added as necessary.

The invention according to claim 6 is a film comprising the above polypropylene resin composition. The method for producing the film is not particularly limited, and may be produced by any conventionally known method using the polypropylene-based resin composition.For example, the polypropylene-based resin composition may be a single-screw extruder. By kneading in a heated and molten state using a kneader such as a twin-screw extruder, a Banbury mixer, a kneading roll, a Brabender, a kneader, and extruding the obtained kneaded material using a conventional extruder or the like, a film is formed. Can be molded into In particular, in order to smooth the surface, suppress the generation of crystals, and obtain high transparency, the material is extruded by a T-die method or a downward water-cooled inflation method, and a cooling temperature of 30 to 7 is used.
It is preferable to form a film at 0 ° C.

The above-mentioned film may be laminated with another resin layer. In this case, it is preferable that the above-mentioned film layer is laminated so as to be at least one outermost layer.

[0050]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described specifically with reference to examples. First, the method for producing the spherical resin fine particles (C) constituting the polyolefin resin composition of the present invention will be described.

(Particle 1) A mixture of 90 parts by weight of methyl methacrylate and 5 parts by weight of butanediol diacrylate was mixed with a siloxane (a) represented by the following chemical formula.

Embedded image Was added, and these were copolymerized by emulsion polymerization. The obtained copolymer was dried by a spray-drying method and pulverized with a jut mill to obtain fine particles 1.

(Particles 2) 65 parts by weight of methyl methacrylate, 6 parts by weight of butyl acrylate, 5 parts by weight of styrene, 1 part by weight of acrylic acid, and 3 parts by weight of allyl methacrylate 3
A siloxane represented by the following chemical formula is added to a mixture of parts by weight.
(b)

Embedded image Was added in the same manner as in the production of the fine particles 1 except that these were copolymerized by emulsion polymerization.
I got

(Fine particles 3) Methyl silicone fine particles (average composition formula CH ₃ SiO _1.5 , average particle size 3 μm, sphericity 0.93).

(Fine particles 4) 6 parts by weight of the above siloxane (a) was added to a mixture of 90 parts by weight of methyl methacrylate and 4 parts by weight of butanediol diacrylate, and these were copolymerized by emulsion polymerization. After diluting the emulsified reaction solution to 50% by weight with deionized water, a 20% by weight aqueous solution of sodium sulfate is added at 80 ° C. to coagulate the copolymer, and the mixture is washed with water.
After being dehydrated and dried, it is crushed by a jet mill, and fine particles 4
I got

(Fine Particles 5) To a mixture of 90 parts by weight of methyl methacrylate and 5 parts by weight of butanediol diacrylate, 5 parts by weight of the siloxane (a) was added, and these were copolymerized by suspension polymerization. The obtained copolymer was washed with water, dehydrated and dried to obtain fine particles 5.

(Fine particles 6) 30 parts by weight of the above siloxane (a) was added to a mixture of 60 parts by weight of methyl methacrylate, 19 parts by weight of ethyl methacrylate and 1 part by weight of ethylene glycol diacrylate, and these were copolymerized by emulsion polymerization. did. The obtained copolymer was dried by a spray-drying method and crushed by a hammer mill to obtain fine particles 6. Table 1 shows the physical properties of the obtained spherical resin fine particles (C).

[0057]

[Table 1]

Next, a performance evaluation method will be described. With respect to the films and bags obtained in the examples and comparative examples, evaluation tests were performed on the following evaluation items by the following method.

(1) Transparency: Haze (JIS K710)
It was evaluated by the measurement in 5). (2) Slipperiness: The kinetic friction coefficient was evaluated by measuring (ASTM-D1894). (3) Modulus of elasticity: Measured according to JIS K7133. (4) Initial antistatic property: After the bag was kept in an oven at 45 ° C for 70 hours, the surface specific resistance value of the outer surface of the bag was measured according to JIS-K6911.

(5) Film appearance: Fine irregularities and spots due to spherical resin fine particles and higher fatty acid amide on the film surface were visually observed and evaluated according to the following criteria. 4: no unevenness or spots at all 3: slight unevenness or spots, but no practical problem 2: many unevenness or spots observed 1: many unevenness or spots, practical use impossible

(6) Stability over time: After holding the film in an oven at 45 ° C. for 6 months, the degree of yellowing was observed. ：: No yellowing, and antistatic properties are maintained. Δ: No yellowing, but antistatic performance is deteriorated. X: Yellowing is observed.

(7) Blocking property: JIS-Z0219
According to the above, four films are stacked and a load of 500 g is applied.
After being kept in an oven at 0 ° C. and a humidity of 75% for 24 hours,
It was left at room temperature for one hour and evaluated according to the following criteria. 3: No stickiness. The contact surface slides freely. 2: Almost no stickiness. The contact surface is not slippery. 1: Pretty sticky. Difficult to remove contact surface

Examples 1-5, Comparative Examples 1-13 The spherical resin fine particles shown in Table 1 were added to 100 parts by weight of random copolymerized polypropylene having an MFR of 6.0 g / 10 min.
(C) and the vinyl aromatic elastomer (B) shown in Table 2,
Higher fatty acid amides (D), aliphatic monocarboxylic acid partial esters (E), and dibenzylidene sorbitol were mixed in predetermined amounts shown in Table 2, and kneaded at 210 ° C. for 10 minutes.
The obtained resin composition is cooled by a T-die method with a cooling roll to 30
The film was formed while cooling to ° C. to obtain a transparent film having a thickness of 40 μm.

Comparative Example 14 Spherical resin fine particles shown in Table 1 were added to 100 parts by weight of a random copolymerized polypropylene having an MFR of 6.0 g / 10 min.
(C) and the vinyl aromatic elastomer (B) shown in Table 2,
Higher fatty acid amides (D), aliphatic monocarboxylic acid partial esters (E), and dibenzylidene sorbitol were mixed in predetermined amounts shown in Table 2, and kneaded at 210 ° C. for 10 minutes.
The obtained resin composition was cooled to 70 by a T-die method using a cooling roll.
The film was formed while cooling to ° C. to obtain a transparent film having a thickness of 40 μm.

Comparative Example 15 Spherical resin fine particles shown in Table 1 were added to 100 parts by weight of random copolymerized polypropylene having an MFR of 6.0 g / 10 min.
(C) and the vinyl aromatic elastomer (B) shown in Table 2,
Higher fatty acid amides (D), aliphatic monocarboxylic acid partial esters (E), and dibenzylidene sorbitol were mixed in predetermined amounts shown in Table 2, and kneaded at 210 ° C. for 10 minutes.
The obtained resin composition was cooled to 15
The film was formed while cooling to ° C. to obtain a transparent film having a thickness of 40 μm.

The performance of the obtained film was evaluated, and the results are shown in Table 3. The abbreviations in Table 2 are as follows.

In the column of elastomer (B), HSBR
Is a hydrogenated styrene-butadiene random copolymer (manufactured by Nippon Synthetic Rubber Co., Dynalon 1320P, styrene content 1
0%, MFR 3.5), SEPS is a styrene-ethylene-propylene-styrene block copolymer (Kuraray Co., Ltd., Septon 2007, styrene content 30%, MFR
7), HSIPS is a hydrogenated styrene-isoprene-styrene block copolymer having isoprene 3,4 bonds (manufactured by Kuraray Co., Ltd., Hypla HVS-3, styrene content 20%,
MFR6).

In the section of fatty acid amide (D), amide 1
Is erucamide, and amide 2 is erucamide 7
It is a mixture of 5% by weight and 25% by weight of behenamide.
In the column of partial ester (E), AS1 is diglycerin monostearate, AS2 is glycerin monostearate, and AS3 is stearyldiethanolamine.

[0069]

[Table 2]

[0070]

[Table 3]

[0071]

Since the composition of the polyolefin resin composition of the present invention is as described above, various packaging materials such as fiber packaging and food packaging; various containers such as medical containers, cosmetic containers and food containers; It can also be suitably used as a molded article material such as electric parts, machine parts, household molded articles, agricultural and marine products, building materials, miscellaneous goods and the like.

Further, a film can be easily obtained from this resin composition, and the obtained film has excellent blocking resistance, antistatic property, transparency and gloss, and excellent flexibility and is less slippery. It is.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) // (C08L 23/10 25:10 51:08) (C08L 23/10 53:02 51:08) F Terms (reference) 4F071 AA12 AA12X AA20 AA22 AA22X AA33 AA33X AA67 AA67X AA77 AC09 AC10 AC12 AC19 AF58 BA01 BB06 BC01 BC17 4J002 AC082 AC102 BB111 BC033 BC052 BG053 CL003 CM033 CP033 EA018 EF018 EG018 EG018 EF018 EG018 EG018 EG018 EA018 EA018 EA018 EA018 EA018 EA018 EG018 EG018 EG018 EG018 EG018 EA018 EF018

Claims (6)

[Claims] 1. 100 parts by weight of a polypropylene resin (A), 2 to 10 parts by weight of a vinyl aromatic elastomer (B), an average particle size of 0.5 to 8 μm, and f = [M / (π / 4) )] ^0.5 / Nmax (where M is an arbitrary cross-sectional area mm ² of the fine particles, Nmax
Represents the longest diameter mm of the section. A) spherical resin fine particles (C) having a sphericity f of 0.8 or more
03 to 0.5 parts by weight, higher fatty acid amide (D) 0.03 to
0.4 part by weight, consisting of 0.05 to 1.5 parts by weight of an aliphatic monocarboxylic acid partial ester of a 4- to 6-valent polyol (E) and 0.005 to 0.1 parts by weight of a crystal nucleating agent (F) Polypropylene resin composition. 2. The polypropylene resin composition according to claim 1, wherein the vinyl aromatic elastomer (B) is a hydrogenated styrene-butadiene random copolymer or a hydrogenated styrene-isoprene-styrene block copolymer. 3. The spherical resin fine particles (C) are represented by the general formula (I): (Wherein, R is the same or different from each other, and has 1 to 1 carbon atoms)
2 represents a substituted or unsubstituted monovalent hydrocarbon group, and at least 50 mol% of all Rs are methyl groups. X represents a radical polymerizable functional group-containing organic group, and n represents an integer of 5 to 200. ), A non-crosslinkable radical polymerizable monomer copolymerizable therewith, and a crosslinkable radical polymerizable monomer, and having a refractive index of 1.45 to 1. The polypropylene resin composition according to claim 1, which is a particle having 52. 4. The organic group X in the organopolysiloxane represented by the general formula (I) is represented by the general formula (II): (Wherein, R ¹ represents a divalent organic group having 3 to 20 carbon atoms which may contain a hetero atom, and R ² represents a hydrogen atom or a methyl group, respectively) or the general formula (III): The polypropylene resin composition according to claim 3, which is a group represented by the formula: 5. The polypropylene resin composition according to claim 1, wherein the higher fatty acid amide (D) is a monocarboxylic amide having 16 to 24 carbon atoms in the hydrocarbon group. 6. A film comprising the polypropylene resin composition according to any one of claims 1 to 5.