JP2000080221A - Polypropylene-based resin composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To otain a polypropylene-based resin composition having excellent antistatic properties, high glass cloudiness preventing properties, etc., of molding product by formulating a crystalline propylene polymer with a specific ester- based compound, etc. SOLUTION: This composition comprises (A) 100 pts.wt. of a crystalline polypropylene-based polymer, (B) 0.01-6 pts.wt. of a component composed of (i) a fatty acid ester of a polyoxyalkylene alkylamine of the formula (R1 is a 8-22C alkyl; R2 is a 5-29C alkyl; A1 and A2 are each a 2-3C alkylene; (n) and (m) are each >=1 and n+m=2-10), (ii) a glycerol fatty acid ester in which the fatty acid constituting the ester is a 12-22C saturated fatty acid and (iii) an epoxy compound having 160-10,000 molecular weight and containing >=1 wt.% oxirane oxygen derived from the epoxy group in the weight ratios of the component (i)/the component (ii) of 47/53-10/90, the component (i)/the component (iii) of 95/5-5/95, (C) 0-60 pts.wt. of an ethylene-based and/or a styrene-based elastomer and (D) an inorganic filler.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an excellent antistatic property of a molded article, a high level of antifogging property of glass, an anti-whitening property, a processability of injection molding (injection compression molding) and a balance of physical properties (rigidity, rigidity, The present invention relates to a novel propylene-based resin composition having an impact strength, and more particularly to a propylene-based resin composition suitable as a material for various living materials, industrial parts, and especially for automobile interior parts.

[0002]

2. Description of the Related Art Hitherto, polypropylene resin compositions have been put to practical use as materials for various living materials and industrial products, utilizing their excellent mechanical strength and economical characteristics. However, in recent years, polypropylene resin compositions have been required to have further improved antistatic properties and anti-fogging properties of glass. In particular, for example, in the field of automobile interior parts, injection molding (injection compression molding) processability and physical properties are required. Along with balance (rigidity, impact strength), improvement in antistatic properties, antifogging properties of glass, and antiwhitening properties is required.

[0003] The term "glass fogging" means a phenomenon in which glass or the like is fogged by volatile components of a molded article, and the ability to suppress the fogging is glass fogging prevention. Extremely useful. Further, surface whitening is a phenomenon in which volatile components change into a white powder or the like on the surface of a molded product and deteriorate the appearance of the molded product.
That is, the improvement of the surface whitening prevention property is important from the viewpoint of design.

[0004]

DISCLOSURE OF THE INVENTION The present invention provides an excellent antistatic property of a molded article, a high degree of glass fogging preventing property, surface whitening preventing property, and injection molding (injection compression molding) workability and physical property balance ( An object of the present invention is to provide high-performance products for various living materials and industrial products, particularly automobile interior parts, by providing a novel propylene-based resin composition having rigidity and impact strength.

[0005]

Means for Solving the Problems The present inventors have conducted various studies in order to solve the above-mentioned problems. As a result, the crystalline propylene polymer was added to a specific ester component, and in some cases, a specific elastomer. A polypropylene resin composition obtained by blending a specific inorganic filler in a specific ratio provides excellent antistatic properties of a molded article, as well as high glass antifogging properties, surface whitening prevention properties, and injection molding ( Injection compression molding) Workability and physical property balance (rigidity,
Impact strength), and completed the present invention.

That is, the present invention provides the following components (a) to
(D) a polypropylene resin composition. (A) Crystalline polypropylene polymer: 100 parts by weight (b) Consists of the following (A), (B) and (C), and the weight ratio thereof is (A) / (B) = 47 / 53-10 / 9
0, a component wherein (a) / (c) = 95/5 to 5/95:
0.01 to 6 parts by weight (a): fatty acid ester of polyoxyalkylenealkylamine represented by general formula (I)

[0007]

Embedded image (In the formula, R ¹ represents an alkyl group having 8 to 22 carbon atoms, R ²
Represents an alkyl group having 5 to 29 carbon atoms; A ¹ and A ² represent the same or different alkylene groups having 2 to 3 carbon atoms;
A ¹ and m A ² may be the same or different.
n and m are each 1 or more, and n + m is a number of 2 to 10. (B): The fatty acid constituting the ester has 12 to 22 carbon atoms.
(C): an epoxy compound having a molecular weight of 160 to 10,000 and containing 1% by weight or more of oxirane oxygen derived from an epoxy group. (C) Ethylene-based and / or styrene-based elastomer: 0 To 60 parts by weight (d) Inorganic filler: 0 to 100 parts by weight

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [I] Polypropylene resin composition Constituents The polypropylene resin composition of the present invention comprises the following components (a) and (b), and optionally, components (c) and (d).

(1): crystalline polypropylene polymer [component (a)] (i) Structure The crystalline polypropylene polymer of the component (a) used in the present invention is a homopolymer of propylene (polypropylene), The majority of propylene and other α-olefins (eg, ethylene, 1-butene, 1-pentene, 1-
Hexene, 4-methyl-1-pentene, 1-octene, etc.), vinyl esters (for example, vinyl acetate), aromatic vinyl monomers (for example, styrene), vinylsilanes (for example, bilyltrimethoxysilane, vinyltrimethylsilane) And the like, and may be a block, random or graft copolymer of two or more of these, and a mixture thereof. The melt flow rate (MFR, 230 ° C., 2.16 kg load) of the entire crystalline polypropylene polymer is
0.1 to 300 g / 10 min is preferable, and 10 to 200 g
/ 10 minutes is particularly preferred.

Above all, propylene / ethylene / random copolymers and propylene / ethylene / block copolymers containing a crystalline polypropylene portion (A unit portion) and an ethylene / propylene / random copolymer portion (B unit portion) are used. Preferably, a propylene / ethylene-block copolymer is particularly preferred. In the propylene / ethylene-block copolymer, the crystalline polypropylene homopolymerized portion (A unit) is 60 to 95% by weight, preferably 65 to 9% by weight.
2% by weight, particularly preferably 65 to 87% by weight, having a weight average molecular weight (Mw) of 200,000 to 1,200,00
0, preferably 250,000 to 1,000,000,
Particularly preferably, an ethylene / propylene-random copolymer part (B unit part) having a molecular weight of 300,000 to 800,000.
And 5 to 40% by weight, preferably 8 to 35% by weight, particularly preferably 13 to 35% by weight, and the total MFR
Is 10 to 200 g / 10 min, preferably 20 to 100 g
/ 10 minutes, particularly preferably 30 to 80 g / 10 minutes, and the swell index value (S value) is 0.5 to 1.
5, preferably 0.6 to 1.4, particularly preferably 0.7
Preferred are propylene-ethylene-block copolymers of 1.3 to 1.3. These may be used alone or in combination of two or more.

Here, the density of the crystalline polypropylene homopolymer in the unit A is 0.9071 g from the viewpoint of rigidity and the like.
/ Cm ³ or more, particularly preferably 0.9081 g / cm ³ or more. When the content of the crystalline propylene homopolymerized portion (A unit) is less than the above range, the rigidity is insufficient, and when it exceeds the above range, the impact strength is insufficient. When the content ratio of the ethylene / propylene-random copolymer part in the B unit is less than the above range, the impact strength is insufficient, and when it exceeds the above range, the rigidity is insufficient. When the weight-average molecular weight (Mw) of the B unit exceeds the above range, the moldability (weld appearance) decreases, and when it is less than the above range, the impact strength decreases.

When the MFR of the propylene / ethylene-block copolymer is less than the above range, the moldability (flowability and overall appearance) is poor, and when it exceeds the above range, the impact strength becomes insufficient. If the S value of the propylene / ethylene-block copolymer is out of the above range, the moldability (weld appearance and flow mark appearance) will be poor.

The component (a) crystalline polypropylene polymer used in the present invention comprises the following (d) or / and (e)
It is preferable in terms of suppressing glass fogging, preventing heat deterioration and improving processing stability and durability, and is usually mixed with a polymerization powder and then melt-kneaded with an extruder to contain. Component (b), optionally component (c) to
Simultaneous melt-kneading together with (d) [in this case, a powdery component (a) can also be used], and the latter can be used for the purpose of dispersing the component (d).

(D): Hindered phenolic antioxidant Component (a) Hindered phenolic antioxidant which can be contained in the crystalline polypropylene polymer (d)
Is a hindered phenolic antioxidant having a melting point of 105 ° C. or more, and is 0.0% per 100 parts by weight of component (a).
It is preferable to use 1 to 0.5 part by weight, especially 0.04 to 0.2 part by weight. Hindered phenolic antioxidants having a melting point of 105 ° C. or higher include pentaerythrityl-tetrakis- [3- (3,5-di-t-butyl-
4-hydroxyphenyl) propionate]; N, N '
-Hexamethylenebis (3,5-di-t-butyl-4-
1,3-, 5-trimethyl-2,4,6-tris (3,5-di-t-butyl-4-hydroxybenzyl) benzene; tris (3,5
-Di-tert-butyl-4-hydroxybenzyl) -isocyanurate; 1,3,5-tris (4-tert-butyl-3)
-Hydroxy-2,6-dimethylbenzyl) isocyanurate; (2,2'-methylenebis [4-methyl-6-
t-butylphenol]); 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.

(E) Non-alkali metal salt of fatty acid Component (a) The non-alkali metal salt of fatty acid (e) which can be contained in the crystalline polypropylene polymer is 60
A non-alkali metal salt of a fatty acid having a molecular weight of 0 or more and a melting point of 110 ° C. or more, preferably used in an amount of 0.01 to 3 parts by weight, particularly 0.04 to 0.5 part by weight, per 100 parts by weight of the component (a). . As a non-alkali metal salt of a fatty acid having a molecular weight of 600 or more and a melting point of 110 ° C. or more,
Aluminum stearate; calcium stearate;
Zinc stearate; aluminum oleate; calcium behenate; magnesium behenate; zinc behenate;
1,2-calcium hydroxystearate; 1,2-
Magnesium hydroxystearate; zinc 1,2-hydroxystearate and the like.

(Ii) Production The crystalline polypropylene polymer used in the present invention is produced by slurry polymerization, gas phase polymerization or liquid phase bulk polymerization using a highly stereoregular catalyst. The polymerization method is batch polymerization. , And continuous polymerization. For example, in the case of a propylene-ethylene-block copolymer, propylene is used using a catalyst in which an organoaluminum compound component is combined with a solid component formed by contacting titanium tetrachloride, an organic acid halide, and an organosilicon compound with magnesium chloride. Of propylene and then random copolymerization of propylene and ethylene. MFR of crystalline polypropylene polymer
May be adjusted only by polymerization, or may be optionally adjusted with peroxide after polymerization.

The content of the unit B is determined by immersing 1 g of a sample in 300 ml of boiling xylene for 30 minutes to dissolve, cooling the mixture to room temperature, and filtering and drying it with a glass filter to obtain a solid phase weight. This is the value calculated back. M in B unit
w is a value obtained by separately concentrating and drying the melt filtered (passed) through the above glass filter and subjecting it to gel permeation chromatography (GPC). The MFR is JIS-K7210 (230 ° C, 2.1
6 kg). The S value is measured by a melt indexer (MFR measuring device: JIS K7210).
The sample was extruded into a measuring cylinder (in ethyl alcohol) under the conditions of an extrusion temperature of 190 ° C., a nozzle inner diameter of 1.0 mm, a nozzle length of 8 mm, and an extrusion speed of 0.1 g / min. , Measured with a laser light meter or a micrometer, and calculated by the following formula. S value = solidified extrusion sample diameter / nozzle inner diameter The S value can be approximated and replaced by a die swell value (190 ° C., extrusion nozzle diameter 1.0 mm, shear rate = 24 sec ⁻¹ ) determined by a capillary rheometer. In many cases, it is about 0.05 to 0.10 larger than the above method.

(2) Ester component [Component (b)] The ester component of the component (b) used in the present invention includes the following (A): fatty acid ester of polyoxyalkylene alkylamine, and (B): glycerin fatty acid Ester and (c): an epoxy compound, and the weight ratio thereof is (a) / (b) = 47/53 to 10/90;
(A) / (c) = 95/5 to 5/95.
(A), (B), (C) and the weight ratio thereof will be described in detail.

(I) (a): Fatty acid ester of polyoxyalkylenealkylamine (a) is a fatty acid ester of polyoxyalkylenealkylamine represented by the general formula (I).

[0020]

Embedded image (In the formula, R ¹ represents an alkyl group having 8 to 22 carbon atoms, R ²
Represents an alkyl group having 5 to 29 carbon atoms, A ¹ and A ² are the same or different and represent an alkylene group having 2 to 3 carbon atoms,
n A ¹ and m A ² may be the same or different.
n and m are each 1 or more, and n + m is a number of 2 to 10. )

The fatty acid ester of polyoxyalkylene alkylamine is synthesized by the reaction of polyoxyethylene amine with a fatty acid. The reaction molar ratio of polyoxyethylene amine and fatty acid is preferably from 1 / 0.7 to 1 / 1.3. If the reaction molar ratio of fatty acid is less than 0.7, the effect of preventing glass fogging is insufficient and unsuitable. When it exceeds 1.3 mol, the expression of the antistatic effect is deteriorated, which is not preferable. Specifically, polyoxyethylene (2 mol) stearylamine monostearate;
Mol) stearylamine monobehenate; polyoxyethylene (2 mol) laurylamine monostearate; polyoxyethylene (4 mol) stearylamine monostearate; polyoxyethylene (8 mol) stearylamine monostearate and the like. Can be done.

(Ii) (b): Glycerin fatty acid ester (b) is a compound in which the fatty acid constituting the ester has 12 to 2 carbon atoms.
It is a glycerin fatty acid ester which is a saturated fatty acid of No. 2, and preferably has a monoester content of 50% by weight or more. If the monoester content is less than 50% by weight, the manifestation of the antistatic effect will be poor. The saturated fatty acids having 12 to 22 carbon atoms constituting the ester may be used alone or as a mixed fatty acid. Specifically, glycerin monostearate, a mixture of glycerin monostearate and distearate having a monoester content of 50% by weight or more, a mixture of glycerin monolaurate and dilaurate, a glycerin ester of a mixed fatty acid of palmitic acid and stearic acid, and the like Can be mentioned.

(Iii) (C): Epoxy compound (C) is an epoxy compound having a molecular weight of 160 to 10,000 and containing 1% by weight or more of oxirane oxygen derived from an epoxy group. Specific examples of epoxy compounds include epoxidized soybean oil, epoxidized oils and fats such as epoxidized linseed oil, epoxidized octyl stearate, epoxy plasticizers such as epoxidized octyl hexahydrophthalate, α-olefin epoxide, bisphenol A diglycidyl ether, bisphenol A-epichlorohydrin type epoxy resin, ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, 1,4-butanediol diglycidyl ether, 1,3-propylene glycol diglycidyl ether, etc. Glycols such as diglycidyl ether may be mentioned, but the chemical structure is not limited. Further, it may be used alone or as a mixture of several kinds of epoxy compounds, and the effect is not affected. Particularly preferred as the epoxy compound is a compound represented by the general formula (II) or (III).

[0024]

Embedded image

When the molecular weight of the epoxy compound is less than 160, the effect of preventing glass fogging is small, and when it exceeds 10,000, the effect is poor. When the oxirane oxygen derived from the epoxy group of the epoxy compound is less than 1% by weight, the effect of preventing glass fogging is small.

(Iv) Weight ratio of (a), (b), and (c) The weight ratio of (a), (b), and (c) is (a) / (b) =
47/53 to 10/90, and (a) / (c) = 95
/ 5 to 5/95. (A) / (b) (weight ratio) is 4
If it exceeds 7/53, the glass fogging prevention is poor.
If it is less than 0, surface whitening is poor. When (a) / (c) (weight ratio) exceeds 95/5, the antifogging property of the glass is inferior, and when it is less than 5/95, the antistatic property is inferior.

The component (b) comprises the components (a), (b),
(C) As a mixture of the three components, in each individual state,
The form and usage of the mixture of two components and the remaining one component are not limited as long as they are within the above-mentioned weight ratio.

(3) Ethylene-based or styrene-based elastomer [Component (c)] In the present invention, the ethylene- or styrene-based elastomer of the component (c) optionally used is an ethylene-α-olefin having 3 to 18 carbon atoms. Copolymers, styrene-ethylene-butylene-styrene-block copolymers, styrene-ethylene-propylene-styrene-block copolymers, styrene-ethylene-propylene-block copolymers and the like are exemplified. Among them, ethylene / propylene copolymer, ethylene / 1-butene copolymer, ethylene / 1-hexene copolymer and ethylene / 1-octene copolymer are preferable, and especially ethylene / propylene copolymer and ethylene / 1 -Butene copolymer and ethylene / 1-octene copolymer are preferred. These elastomers may be used alone or in combination of two or more. The method for producing these elastomers is not particularly limited, but is preferably produced using a vanadium compound-based catalyst or a metallocene-based catalyst as described in WO-91 / 04257.

(4) Inorganic filler [Component (d)] In the present invention, the inorganic filler of the component (d) optionally used includes talc, calcium carbonate, mica, glass fiber, barium sulfate, wollastonite, carbon Fibers and whiskers are exemplified. Among them, talc is preferable, and talc having an average particle diameter of 1.5 to 15 μm is particularly preferable. The inorganic filler is effective for improving rigidity, heat resistance and dimensional stability of a molded product, adjusting dimensions, and the like. The average particle size of talc is a value measured using a laser diffraction / scattering type particle size distribution analyzer. As a measuring device, for example, LA-920 manufactured by Horiba, Ltd. is preferable because of excellent measurement accuracy.

(5) Other components (arbitrary components) [Component (e)] In the polypropylene resin composition of the present invention, the performance of the polypropylene resin composition of the present invention is improved within a range that does not significantly impair the effects of the present invention or is further improved. Therefore, the components (a), (b), (c),
In addition to (d) and (d), any of the following additives and ingredients can be blended. Specifically, pigments for coloring, nucleating agents, flame retardants, antioxidants, processing stabilizers, dispersants, neutralizers, light stabilizers, polystyrene, etc. other than the above components (a) to (d) Of various resins, antistatic agents, various rubbers, various fillers, and the like.

Among them, for example, a non-ionic antistatic agent is effective for further improving the antistatic property of the composition or molded article of the present invention. Specific examples include polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, alkyl diethanolamine, alkyl diethanol amide, and the like. Furthermore, a nucleating agent, for example, an inorganic nucleating agent such as talc or an organic nucleating agent such as a metal salt of an aromatic carboxylic acid, a sorbitol or a metal salt of an aromatic phosphate, may be used for the rigidity of a molded article of the composition of the present invention. It is extremely effective for imparting and improving heat resistance and hardness. Further, the benzoate compound or the hindered amine compound having a molecular weight of 430 or more, preferably 500 or more keeps the weather resistance of the composition of the present invention in a good balance between glass antifogging property, antistatic property and surface whitening preventing property. While improving.

2. Blending Ratio The components (b), (c) and (d) to be blended in the polypropylene resin composition of the present invention are blended based on 100 parts by weight of the component (a). Component (b) blended in the polypropylene resin composition of the present invention
The amount of the ester component is 0.01 to 6 parts by weight, preferably 0.1 to 6 parts by weight, per 100 parts by weight of the component (a).
It is 4 parts by weight, particularly preferably 0.2 to 1.5 parts by weight. If the compounding ratio is less than 0.01 part by weight, the antistatic property is insufficient, and if it exceeds 6 parts by weight, the glass antifogging property, the rigidity and the like are inferior and each is inappropriate.

In the polypropylene resin composition of the present invention, the ethylene-based or styrene-based elastomer of the component (c) optionally blended is 0 to 60 parts by weight, preferably 100 parts by weight, based on 100 parts by weight of the component (a). Is from 0 to 40 parts by weight, particularly preferably from 0 to 30 parts by weight. If the compounding ratio exceeds the above range, the rigidity and the heat resistance become poor, which is not suitable.

In the polypropylene resin composition of the present invention, the mixing ratio of the inorganic filler of the component (d), which is optionally added, is 0 to 100 parts by weight of the component (a).
-100 parts by weight, preferably 0-70 parts by weight, particularly preferably 0-40 parts by weight. If the compounding ratio exceeds the above range, the impact strength becomes inferior and is not suitable.

3. Production of polypropylene-based resin composition (1) Kneading and granulation The polypropylene-based resin composition of the present invention comprises the above component (a), component (b), and optionally component (c) and component (d). It is obtained by kneading and granulating using a conventional kneading machine such as a single screw extruder, a twin screw extruder, a Banbury mixer, a roll mixer, a Brabender plastograph, a kneader and the like. In this case, it is preferable to select a kneading / granulating method capable of improving the dispersion of each component. Usually, kneading / granulating is performed using a twin-screw extruder. During the kneading and granulation, the components (a) and (b), and optionally the components (c) and (d) may be kneaded at the same time. It is also possible to divide each component, for example, first knead some or all of component (a) and component (b), and then knead and granulate the remaining components. In addition, component (b)
A so-called masterbatch kneaded with the component (a) or various resins at a high concentration in advance can be diluted and used during kneading and granulation or injection (compression) molding.

(2) Molding of Polypropylene-Based Resin Composition The polypropylene-based resin composition of the present invention obtained as described above is prepared by injection molding (including gas injection molding), injection compression molding (press injection), and extrusion. Various molded products can be obtained by molding (including film molding) or hollow molding.

[II] Physical Properties of Polypropylene Resin Composition The propylene resin composition of the present invention produced by the above method preferably has an antistatic property (surface resistivity) of 1 ×.
The glass haze (haze value at 100 ° C. under 5 Hrs) is controlled to 10 ¹⁴ Ω or less, particularly preferably 1 × 10 ¹³ Ω or less, preferably 10% or less, particularly preferably 5% or less. 60 ℃, under 240Hrs)
Generation is prevented, antistatic property, glass antifogging property,
A high degree of balance between surface whitening prevention and
The MFR is controlled to preferably 10 g / 10 min or more, particularly preferably 20 g / 10 min or more, so that the injection molding processability and the injection compression molding processability are good, and the flexural modulus is preferably 1000 Mpa or more, especially Preferably, not less than 1200 Mpa, notched Izod impact strength (a
(t23 ° C.) is preferably 5 KJ / m ² or more, and particularly preferably 7 KJ / m ² or more.

[III] Applications Since the polypropylene resin composition of the present invention can exhibit the above-mentioned properties, it can be used as a molding material for various industrial parts such as products for various living materials, automobile parts and home electric appliances. Among them, automotive interior and exterior parts,
In particular, it is suitable as a molding material for interior parts such as trims, pillars, door trims, instrument panels, and consoles.

[0039]

EXAMPLES In order to describe the propylene-based resin composition of the present invention in more detail, the present invention will be described in detail with reference to the following examples, but the present invention is not limited to these examples. [I] Raw materials The raw materials here are as follows. (1) Component (a) a-1: The density is 0.9092 g / cm ³ , the polymerization MFR of the whole component (a) is 25 g / 10 min, the S value is 1.34, and n-octadecyl- A propylene homopolymer produced by gas phase polymerization, containing 0.15 parts by weight of β- (4′-hydroxy-3 ′, 5′-di-tert-butylphenol) propionate per 100 parts by weight of component (a) ( Pellets) a-2: density 0.9092 g / cm ³ , polymerization MFR of the whole component (a) is 25 g / 10 min, S value is 1.35, and pentaerythrityl-tetrakis- [3-
(3,5-di-t-butyl-4-hydroxyphenyl)
Propionate], 0.15 parts by weight per 100 parts by weight of component (a), propylene homopolymer (pellet) produced by gas phase polymerization

A-3: 85% by weight of unit A having a density of 0.9091 g / cm ³ and a weight average molecular weight of 450,000
Of the component (a) was 21 g / 10 min, the S value was 1.15, and pentaerythrityl-tetrakis- [3-
(3,5-di-t-butyl-4-hydroxyphenyl)
Propionate] was dry-blended with 0.15 parts by weight per 100 parts by weight of component (a), and propylene / ethylene-block copolymer (powder) produced by gas phase polymerization a-4: Density of 0.9091 g / cm ³ A unit part of 8
3 wt%, 17 wt% of a B unit part having a weight average molecular weight of 430,000, each having a polymerization MFR of 32 g / 10 min, an S value of 1.08, and tris ( 3,5-di-t-butyl-4-hydroxybenzyl) -isocyanurate was added in an amount of 0.15 part by weight per 100 parts by weight of component (a) and magnesium 1,2-hydroxystearate to 100 parts by weight of component (a). Propylene ethylene-block copolymer (powder) produced by gas phase polymerization, dry blended at 0.05 parts by weight per part by weight

A-5: 75% by weight of the unit A having a density of 0.9091 g / cm ³ , and a weight average molecular weight of 380,000
Of the component (a), the polymerization MFR of the entire component (a) is 31 g / 10 min, the S value is 1.05, and tris (3,5-di-t-butyl- 4-Hydroxybenzyl) -isocyanurate is converted to component (a) 1
0.15 parts by weight per 100 parts by weight of magnesium 1,2-hydroxystearate was added to 0.05 parts by weight per 100 parts by weight of component (a) and sodium bis- (4-t-
Butylphenyl) phosphate is added to component (a) 100
Propylene-ethylene-block copolymer (pellet) produced by gas phase polymerization containing 0.20 parts by weight per part by weight

(2) Component (b) b-1: Component (a) = N, N-bishydroxyethylstearylamine monostearic acid monoester: Reaction molar ratio of amine to acid 1.0, average molecular weight 620, saponification Value 9
0, a compound having a hydroxyl value of 90 and a total amine value of 90; component (b) = a mixture of glycerin monostearate and distearate: monoester content of 95% or more, average molecular weight of 3
50, a saponification value of 160 and a hydroxyl value of 320; component (c) = bisphenol A diglycidyl ether: a compound having an epoxy equivalent of 190, a molecular weight of 380, and an oxirane oxygen content of 8.4%; B)
An ester-based mixture having a ratio of 0.47 and a weight ratio (a) / (c) of 15.67 b-2: component (a) = N, N-bishydroxyethylstearylamine monostearic acid monoester: amine Acid reaction molar ratio 1.0, average molecular weight 620, saponification value 9
0, a compound having a hydroxyl value of 90 and a total amine value of 90; component (b) = a mixture of glycerin monostearate and distearate: monoester content of 95% or more, average molecular weight of 3
50, a saponification value of 160 and a hydroxyl value of 320; component (c) = bisphenol A diglycidyl ether: a compound having an epoxy equivalent of 190, a molecular weight of 380, and an oxirane oxygen content of 8.4%; B)
Is 0.44, and the weight ratio (a) / (c) is 7.33.
Ester mixture

B-3: The component (a), the component (b), and the component (c) constituting the above b-2 are unit components having a weight ratio (a) / (b) of 0.44 and weight. What was subdivided at a ratio where the ratio (a) / (c) was 7.33 ... not mixed b-4: Component (a) = N, N-bishydroxyethylstearylamine monostearic acid monoester: amine and acid Reaction molar ratio 1.0, average molecular weight 620, saponification value 9
0, a compound having a hydroxyl value of 90 and a total amine value of 90; component (b) = a mixture of glycerin monostearate and distearate: monoester content of 95% or more, average molecular weight of 3
50, a saponification value of 160 and a hydroxyl value of 320; component (c) = bisphenol A diglycidyl ether: a compound having an epoxy equivalent of 190, a molecular weight of 380, and an oxirane oxygen content of 8.4%; B)
Is 0.880, and the weight ratio (a) / (c) is 7.33. Ester mixture b-5: N, N-bishydroxyethylstearylamine monostearic acid monoester: reaction molar ratio of amine to acid 1.0, compound having an average molecular weight of 620, a saponification value of 90, a hydroxyl value of 90 and a total amine value of 90

B-6: a mixture of glycerin monostearate and distearate: monoester content of 95% or more;
A compound having an average molecular weight of 350, a saponification value of 160, and a hydroxyl value of 320 b-7: Bisphenol A diglycidyl ether: a compound having an epoxy equivalent of 190, a molecular weight of 380, and an oxirane oxygen content of 8.4% b-8: Component (a) = N, N-bishydroxyethyl stearylamine monostearic acid monoester: reaction molar ratio of amine to acid 1.0, average molecular weight 620, saponification value 9
0, a hydroxyl value of 90, and a total amine value of 90; component (c) = bisphenol A diglycidyl ether: a compound having an epoxy equivalent of 190, a molecular weight of 380, and an oxirane oxygen content of 8.4%; (C)
B-9: Component (a) = N, N-bishydroxyethylstearylamine monostearic acid monoester: Reaction molar ratio of amine to acid 1.0, average molecular weight 620, saponification Value 9
0, a compound having a hydroxyl value of 90 and a total amine value of 90; component (b) = a mixture of glycerin monostearate and distearate: monoester content of 95% or more, average molecular weight of 3
50, a compound having a saponification value of 160 and a hydroxyl value of 320; an ester mixture comprising a weight ratio (a) / (b) of 0.09.

(3) Component (c) c-1: containing 31% by weight of 1-butene (infrared method);
FR (230 ° C., 2.16 kg) is 12 g / 10 min,
Ethylene / 1-butene copolymer c-2 produced by a solution polymerization method using a metallocene-based catalyst, containing 25% by weight of 1-octene (infrared method),
An ethylene / 1-octene copolymer having a MFR (230 ° C., 2.16 kg) of 10 g / 10 min and produced by a solution polymerization method using a metallocene catalyst.

(4) Component (d) d-1: talc having an average particle size of 5.4 μm and an average aspect ratio of 6

[II] Evaluation method Evaluation was performed by the following method. (1) Antistatic property: 230 ° C. using a super insulation resistance meter (R8340 manufactured by Advantest) according to JEC-148.
-The surface resistivity was measured in an atmosphere of 50% RH. As the test piece, a disc-shaped test piece of 100φ × 3 mmt (prepared by punching from an injection molded sheet) was used, and the applied voltage was 500 V DC.
The application time is one minute. Those having this value of 1 × 10 ¹⁴ Ω or less, particularly 1 × 10 ¹³ Ω or less are practically preferable. The measurement was performed after the specimen was molded and stored at 23 ° C. and 50% RH for 6 days. (2) Glass fogging prevention property: A disc-shaped specimen of 80φ × 3 mmt (prepared by punching from an injection-molded sheet) was set in a glass fogging (fogging) test apparatus conforming to ISO-6452, and a heating temperature: 100 ° C., heating time 5 hours, cooling plate temperature; JIS-K710
The haze value determined by the following equation was measured using a 5N integrating sphere light transmittance measuring apparatus. The smaller the value is, the better the glass fogging prevention property is. Haze value (%) = diffused light transmittance / total light transmittance

(3) Surface whitening property: 120 mm × 120 m
The injection molded sheet of mx 3 mmt was held in a gear oven at 60 ° C for 240 hours. Thereafter, the sheet was taken out and allowed to stand in a standard state for 24 hours, and then the presence or absence of a whitening state on the surface was visually observed. (4) MFR: 230 according to JIS-K7210
It measured at 2.degree. This value is a measure of injection molding processability (injection compression molding processability). (5) Flexural modulus: 2 according to JIS-K7203
It was measured at a temperature of 3 ° C. This value is also a measure of heat resistance. (6) Izod impact strength: Measured with a notch at a temperature of 23 ° C. in accordance with JIS-K7110.

Examples 1 to 9 and Comparative Examples 1 to 6 The above components (a), (b), (c) and (d) were blended in the proportions shown in Table 1 and were mixed with a tumbler mixer. The mixture was sufficiently mixed, and kneaded and granulated using a high-speed twin-screw extruder (KCM) manufactured by Kobe Steel Ltd. Thereafter, the obtained pellets were supplied to an injection molding machine, and a test piece for evaluation was molded and evaluated. Table 2 shows the evaluation results.

[0050]

[Table 1]

[0051]

[Table 2]

As shown in Table 2, all of the resin compositions having the compositions shown in Examples 1 to 9 exhibited good antistatic properties, anti-fogging properties for glass and anti-whitening properties. The resin compositions having compositions shown in Nos. To 9 exhibited a good balance of fluidity (injection molding processability, injection compression molding processability) and good physical properties (rigidity, impact strength). On the other hand, those shown in Comparative Examples 1 to 6 had poor performance balance. In addition, the composition of Example 4 was 1090 mm ×
An automobile door trim of 550 mm × 2 mmt (approximate dimensions) is mounted on a J4000EV (molding temperature 22) manufactured by Japan Steel Works, Ltd.
0 ° C, mold temperature 40 ° C, injection pressure 800kg / cm ² )
Injection-molding showed good antistatic properties, antifogging properties for glass, and anti-whitening properties, and the moldability and mechanical strength balance were at levels sufficient for practical use.

[0053]

EFFECT OF THE INVENTION The propylene resin composition of the present invention exhibits excellent antistatic properties, anti-fogging properties for glass and anti-whitening properties, and has good fluidity (injection molding processability, injection compression molding processability). It has a good balance of physical properties (rigidity, impact strength), so it is important for molding various interior products such as automobile parts, especially instrument panels, trims, pillars, etc. Material.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masao Sakaizawa 1 Toho-cho, Yokkaichi-shi, Mie Japan Polytechnic Co., Ltd. Yokkaichi Technical Center (72) Inventor Yoshihiro Banno 1 Toho-cho, Yokkaichi-shi, Mie Japan Nippon Polychem Inside the Yokkaichi Technical Center Co., Ltd. (72) Inventor Naganori Masuchi 1 Toho-cho, Yokkaichi-shi, Mie Japan Polychem Co., Ltd. F-term (reference) 4J002 AC002 BB121 BB141 BB151 BB151 BB152 BB162 BC022 CD013 CD053 DA018 DE238 DG048 DJ008 DJ048 DJ058 DL008 EG039 EG049 EH047 EJ019 EN016 FD018 FD079 FD103 FD106 FD107 GC00 GN00

Claims (7)

[Claims] 1. A polypropylene resin composition comprising the following components (a) to (d). (A) Crystalline polypropylene polymer: 100 parts by weight (b) Consists of the following (A), (B) and (C), and the weight ratio thereof is (A) / (B) = 47 / 53-10 / 9
0, a component wherein (a) / (c) = 95/5 to 5/95:
0.01 to 6 parts by weight (a): fatty acid ester of polyoxyalkylene alkylamine represented by the general formula (I) (In the formula, R ¹ represents an alkyl group having 8 to 22 carbon atoms, R ²
Represents an alkyl group having 5 to 29 carbon atoms; A ¹ and A ² represent the same or different alkylene groups having 2 to 3 carbon atoms;
A ¹ and m A ² may be the same or different.
n and m are each 1 or more, and n + m is a number of 2 to 10. (B): The fatty acid constituting the ester has 12 to 22 carbon atoms.
(C): an epoxy compound having a molecular weight of 160 to 10,000 and containing 1% by weight or more of oxirane oxygen derived from an epoxy group. (C) Ethylene-based and / or styrene-based elastomer: 0 To 60 parts by weight (d) Inorganic filler: 0 to 100 parts by weight 2. The polypropylene resin composition according to claim 1, wherein the (c) epoxy compound in the component (b) is represented by the general formula (II) or (III). Embedded image 3. The polypropylene resin composition according to claim 1, wherein the component (a) contains the following (d) and / or (e). (D): a hindered phenolic antioxidant having a melting point of 105 ° C. or more, 0.01 to 0.5 parts by weight per 100 parts by weight of component (a) (e): a molecular weight of 600 or more and 110 ° C. or more A non-alkali metal salt of a fatty acid having a melting point, which is 0.01 to 3 parts by weight per 100 parts by weight of component (a) 4. The component (a) comprises 60 to 95% by weight of a crystalline polypropylene homopolymerized portion (A unit) and a weight average molecular weight (Mw) of 200,000 to 1,200,000.
Ethylene-propylene-random copolymerized moiety (B
(Unit unit) 5 to 40% by weight, and the melt flow rate (MFR: 230 ° C., 2.16) of the entire component (a).
(kg) is 10 to 200 g / 10 min, and a propylene / ethylene-block copolymer having a swell index value (S value: 190 ° C) of 0.5 to 1.5.
4. The polypropylene resin composition according to any one of items 1 to 3. 5. Component (d) has an average particle size of 1.5 to 15 μm.
The polypropylene resin composition according to any one of claims 1 to 4, which is m talc. 6. An antistatic property (surface resistivity) of 1 × 10 ¹⁴
Ω or less, glass haze (100 ° C, haze under 5Hrs)
10% or less, no surface whitening (60 ° C., under 240 hrs), MFR of 10 g / 10 min or more, flexural modulus of 100
0Mpa or more, Notched Izod impact strength (at23
C) is 5 KJ / m ² or more. 7. Interior parts for automobiles formed by injection molding or injection compression molding using the polypropylene resin composition according to claim 1.