Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
  • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
  • C08L23/10—Homopolymers or copolymers of propene
  • C08L23/12—Polypropene
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
  • C08L83/04—Polysiloxanes
  • C08L83/06—Polysiloxanes containing silicon bound to oxygen-containing groups
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
  • C08F255/00—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00
  • C08F255/02—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00 on to polymers of olefins having two or three carbon atoms
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
  • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
  • C08L23/10—Homopolymers or copolymers of propene
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
  • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
  • C08L23/10—Homopolymers or copolymers of propene
  • C08L23/14—Copolymers of propene
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
  • C08L83/04—Polysiloxanes
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
  • C08F299/00—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers
  • C08F299/02—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers from unsaturated polycondensates
  • C08F299/08—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers from unsaturated polycondensates from polysiloxanes
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
  • C08G77/04—Polysiloxanes
  • C08G77/20—Polysiloxanes containing silicon bound to unsaturated aliphatic groups
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/04—Oxygen-containing compounds
  • C08K5/14—Peroxides
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L2205/00—Polymer mixtures characterised by other features
  • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
  • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L2205/00—Polymer mixtures characterised by other features
  • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L2207/00—Properties characterising the ingredient of the composition
  • C08L2207/10—Peculiar tacticity
  • C08L2207/14—Amorphous or atactic polypropylene

Definitions

• the present invention relates to a polypropylene resin composition having continuous water repellency, a polyolefin resin composition containing the composition, and a molded product thereof. Specifically, a polypropylene resin composition that improves surface characteristics by blending with a polyolefin resin, imparts continuous water repellency, and has few aggregates and does not deteriorate the appearance of the appearance, and the composition.
• the present invention relates to a polyolefin-based resin composition and a molded product thereof.
• polyolefin resins are widely used in various fields such as automobiles, home appliances, stationery, films, and edible containers.
• various additives are blended.
• a method for improving the surface properties of polyolefin resins such as water repellency, lubricity, and releasability
• a method of kneading a substance having a surface property improving effect such as a silicone compound into the polyolefin resin, the surface of the polyolefin resin The method of applying to is performed.
• a method of kneading is industrially used because it is simple without increasing the number of production steps and has a high effect of improving the surface characteristics of polyolefin resin.
• a surface modifier which is a polypropylene resin composition with water repellency, was developed by combining a polypropylene resin compatible with polyolefin resin and a substance having an effect of improving surface characteristics such as a silicone compound. Has been.
• a polypropylene resin composition having water repellency obtained by combining a polypropylene resin and a silicone compound, a composition comprising polypropylene, an organopolysiloxane having a vinyl group, and an organic peroxide.
• Patent Document 1 A method for producing a polypropylene resin molded product to be molded after melt-kneading the product (see Patent Document 1), a polypropylene resin, and a polyorganosiloxane containing at least one silicon-bonded alkenyl group in one molecule Heat-kneading in the absence of a radical generating catalyst, chemically bonding the polyorganosiloxane to the polypropylene resin, and then adding an antioxidant and heat-kneading (Patent Document 2) Reference) and the like.
• the object of the present invention is to improve the surface characteristics by blending with a polyolefin resin, to provide continuous water repellency, and to reduce the appearance of the appearance with few aggregates. And a polyolefin-based resin composition containing the composition and a molded product thereof.
• this invention which solves the said subject has the following structure.
• a polyolefin resin composition comprising the polypropylene resin composition as described in (1) above.
• the polypropylene-based resin composition according to the present invention has a function as a surface modifier, and when added to the polyolefin-based resin composition, improves the surface properties of the polyolefin-based resin composition and continuously improves water repellency. Further, it is possible to provide a polyolefin resin composition having good lubricity and releasability and having a good appearance with few aggregates and a molded product thereof.
• the polypropylene resin (hereinafter also referred to as “component (A)”) as component (A) used in the present invention is a homopolymer of propylene, ⁇ other than propylene such as propylene and ethylene and butene-1.
• a resin comprising a block copolymer with olefin, a random copolymer, a copolymer such as a graft copolymer, and a mixture of two or more thereof.
• the polypropylene wax that is component (B) used in the present invention (hereinafter sometimes referred to as “component (B)”) is obtained by polymerizing propylene or depolymerizing general high molecular weight polypropylene.
• the number average molecular weight of the polypropylene wax is preferably a low molecular weight polypropylene of about 1000 to 20000.
• component (B) include biscol 330-P, biscol 440-P, biscol 550-P, biscol 660-P (all trade names; manufactured by Sanyo Chemical Industries), high wax NP055, and high wax.
• NP105 high wax NP505, high wax NP805 (all trade names; manufactured by Mitsui Chemicals), lycowax PP230 (trade names; manufactured by Clariant), etc. are commercially produced and used in the present invention. be able to.
• the polyorganosiloxane (hereinafter also referred to as “component (C)”) containing at least one silicon atom-bonded alkenyl group in one molecule as the component (C) used in the present invention is a polyorganosiloxane.
• One or more alkenyl groups are bonded to the silicon atom.
• the skeleton of the polyorganosiloxane may be linear, branched, cyclic, or a mixture thereof.
• polyorganosiloxane examples include polydimethylsiloxane blocked with both ends dimethylvinylsiloxy group, dimethylsiloxane / methylsiloxane copolymer blocked with dimethylvinylsiloxy group at both ends, polymethylvinylsiloxane blocked with trimethylsiloxy group at both ends, trimethylsiloxy at both ends.
• Group-blocked dimethylsiloxane / methylvinylsiloxane copolymer both ends dimethylhexenylsiloxy group-blocked polydimethylsiloxane, both ends dimethylhexenylsiloxy group-blocked dimethylsiloxane / methylhexenylsiloxane copolymer, both ends trimethylsiloxy group-blocked polymethylhexenylsiloxane And dimethylsiloxane / methylhexenyl copolymer blocked with trimethylsiloxy groups at both terminals.
• alkenyl group bonded to the silicon atom examples include a vinyl group, a propenyl group, a butenyl group, a pentenyl group, a hexenyl group, and a decenyl group.
• organic groups other than alkenyl groups bonded to silicon atoms include alkyl groups such as methyl, ethyl, propyl, 3,3,3-trifluoropropyl, and 3-chloropropyl, cyclopentyl, and cyclohexyl.
• Aryl groups such as cycloalkyl groups, phenyl groups, and xylyl groups, aralkyl groups such as benzyl groups, phenethyl groups, and 3-phenylpropyl groups, alkoxy groups such as methoxy groups, ethoxy groups, and propoxy groups, and hydroxy groups. .
• the component (C) has various kinematic viscosities, and any of them can be used, but preferably has a kinematic viscosity of about 2 to 1,000,000 mm 2 / s at 25 ° C., more preferably Is about 500 to 1 million mm 2 / s.
• a material other than the kinematic viscosity in the above range is used, the effects of the present invention may be difficult to be exhibited, and it may be difficult to be suitable in terms of processing the surface modifier that is the polypropylene resin composition of the present invention. There is.
• component (D) which is the component (D) used in the present invention, generates radicals by heating, and the component (C) is converted to the component (A) or ( B) For causing chemical bonding with the component.
• ketone peroxides such as methyl ethyl ketone peroxide, methyl isobutyl ketone peroxide and cyclohexanone peroxide
• diacyl peroxides such as isobutyryl peroxide, lauroyl peroxide, and benzoyl peroxide
• hydroperoxides such as diisopropylbenzene hydroperoxide Oxide, dicumyl peroxide, 2,5-dimethyl-2,5-di- (t-butylperoxy) hexane, 1,3-bis- (t-butylperoxy-isopropyl) -benzene, di-t- Dialkyl peroxides such as butyl peroxide, 2,5-dimethyl-2,5-di- (t-butylperoxy) -hexane-3, 1,1-di-t-butylperoxy-3,3,5 -Trimethylcyclo Peroxyketals such as xan
• Lupelox 101 for example, Lupelox 101, Lupelox Sulpelox DC, Lupelox F, Lupelox DI (all trade names; manufactured by Arkema Yoshitomi) and the like are commercially produced and sold in the present invention. Can be used.
• the polypropylene resin composition of the present invention (hereinafter sometimes simply referred to as “the surface modifier of the present invention”) is composed of (A) component polypropylene resin, (B) component polypropylene wax, and (C) component.
• the component (C) is heated and kneaded with a polyorganosiloxane containing at least one silicon atom-bonded alkenyl group in one molecule of (A) and an organic peroxide as the component (D). It is obtained by chemically bonding (grafting) the component (A) and the component (B) with the alkenyl group in the component C).
• a known kneader can be used, for example, a Banbury mixer, a kneader, a single screw extruder, a twin screw extruder, or the like can be used.
• a twin screw extruder is preferable when considering productivity, kneading force, and the like.
• the twin-screw extruder includes two-axis different-direction rotation non-meshing type extruder, two-axis different-direction rotation non-meshing type extruder, two-axis same-direction rotation non-meshing type extruder, two-axis same-direction rotation meshing type
• extruders and any of them can be used, but in order to increase the dispersibility of the component (A), the component (B) and the component (C), and to suppress the progress of the local reaction, the biaxial direction is the same. It is preferable to use a rotary meshing extruder.
• the heating temperature at the time of kneading may be a temperature that is not lower than the temperature at which the polypropylene resin melts and does not deteriorate too much, and specifically, for example, in the range of 160 ° C. to 250 ° C. It is.
• the time for heating and kneading varies depending on the kneading machine to be used, heating conditions, etc. For example, when a twin screw extruder is used as the kneading machine, it is preferably about 30 seconds to 10 minutes, more preferably 1 to 5 minutes.
• the blending ratio (mass ratio) of the polypropylene resin of component (A) and the polypropylene wax of component (B) used for the surface modifier of the present invention is preferably about 99 for component (A): component (B). 1 to 40:60, more preferably about 90:10 to 45:55, and even more preferably about 80:20 to 50:50. At other blending ratios, the effects of the present invention may not be obtained.
• the compounding amount of the polyorganosiloxane containing at least one silicon-bonded alkenyl group in one molecule of the component (C) used for the surface modifier of the present invention is the sum of the components (A) and (B).
• the amount is preferably about 0.5 to 200 parts by mass, more preferably about 2 to 150 parts by mass, and still more preferably about 10 to 100 parts by mass with respect to 100 parts by mass.
• the blending amount of the component (C) is out of the above range, it may be difficult to obtain the effect of the present invention.
• the amount of the component (D) organic peroxide used in the surface modifier of the present invention is preferably about 0.01 to 100 parts by mass with respect to 100 parts by mass of the components (A) and (B). 3.0 parts by mass, more preferably about 0.05 to 3.0 parts by mass.
• the surface modifier of the present invention may be blended with various additives that are usually added to polypropylene resins within a range that does not inhibit the present invention.
• various additives water repellents, lubricants, release agents, etc.
• thermal stabilizers antioxidants, fillers, colorants, antistatic agents, antifogging agents, medium
• additives such as a compatibilizer, weathering agent, ultraviolet absorber, flame retardant, antiblocking agent, impact resistance improver and the like may be blended.
• any of the additives may be before heat kneading, during heat kneading, or after heat kneading.
• Examples of the surface modifier other than the surface modifier of the present invention include non-reactive silicone oil. Specifically, polydimethylsiloxane, polymethylphenylsiloxane, polyether-modified polydimethylsiloxane, alkyl-modified polydimethyl. Examples thereof include siloxane, higher fatty acid-modified polydimethylsiloxane, and fluorine-modified polydimethylsiloxane.
• the surface modifier of the present invention thus obtained itself has improved surface characteristics, has continuous water repellency, and has few aggregates. Therefore, it can be used as it is as a molded product of a polypropylene resin composition. it can.
• the surface modifier of the present invention can be used by blending with a polyolefin resin.
• the surface properties of the resin composition can be improved and continuous water repellency can be imparted without greatly changing the physical properties of the polyolefin resin. , Release properties can be imparted.
• the polyolefin resin composition and its molded product with a very beautiful external appearance can be obtained.
• polystyrene resin examples include homopolymers of ⁇ -olefins such as ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene, copolymers of the ⁇ -olefins, Examples thereof include a copolymer of a monomer other than an ⁇ -olefin copolymerizable with the ⁇ -olefin and an ⁇ -olefin, and a mixture thereof.
• ⁇ -olefins such as ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene
• copolymers of the ⁇ -olefins examples thereof include a copolymer of a monomer other than an ⁇ -olefin copolymerizable with the ⁇ -olefin and an ⁇ -olefin, and a mixture thereof.
• Examples of the monomer other than the ⁇ -olefin copolymerizable with the ⁇ -olefin include vinyl acetate, maleic acid, vinyl alcohol, methacrylic acid, methyl methacrylate, and ethyl methacrylate.
• the blending amount of the surface modifier of the present invention with respect to the polyolefin resin is preferably about 1 to 10 parts by mass of the component (C) in the surface modifier of the present invention with respect to 100 parts by mass of the polyolefin resin. More preferably, the content may be about 2 to 5 parts by mass.
• a polyolefin resin composition can be obtained by mixing the polyolefin resin and the surface modifier of the present invention while heating.
• the polyolefin resin composition thus obtained can be used as a molded body having an arbitrary shape by being subjected to various molding means such as extrusion molding, injection molding, compression molding and sheet molding. Applications of these molded products are widely used for wire covering materials, agricultural materials such as houses and tunnels, miscellaneous goods and daily necessities such as toys and stationery, building materials such as wallpaper, home appliances, and automobiles.
• Examples 1 to 6 and Comparative Examples 1 to 8 ⁇ Preparation of polypropylene resin composition (surface modifier)>
• Raw material (A) component The following was used as a polypropylene resin.
• A-1: Prime Polypro J-105G (trade name; manufactured by Prime Polymer, Homo PP, MI 9)
• A-2: Wintech WFX4T (trade name; manufactured by Nippon Polypro, metallocene random PP, MI 7)
• B component: The following was used as polypropylene wax.
• B-1 Biscol 330-P (trade name; manufactured by Sanyo Chemical Industries, Ltd., molecular weight 15,000)
• Component (C) The following was used as a polyorganosiloxane containing at least one silicon atom-bonded alkenyl group in one molecule.
• C-1 XF40A-1987 (trade name; manufactured by Momentive Performance Materials Japan, kinematic viscosity 1500 mm 2 / s, dimethylvinylsiloxy group-blocked polydimethylsiloxane at both ends)
• D component: The following was used as an organic peroxide.
• D-1 Luperox 101 (trade name; 2,5-dimethyl-2,5-di- (t-butylperoxy) hexane, manufactured by Arkema Yoshitomi)
• Note 1 The following was used as a wax different from the component (B).
• B-2 (trade name: SLIPAX E; Nippon Kasei Co., Ltd., ethylenebisstearic acid amide, amide wax)
• Note 2 The following was used as a polyorganosiloxane (polyorganosiloxane containing no silicon-bonded alkenyl group) different from component (C).
• C-2 (trade name: TSF451-1000; manufactured by Momentive Performance Materials Japan, kinematic viscosity 1500 mm 2 / s)
• (A) component, (B) component, and (D) component are added from the raw material charging port of the axial co-rotating intermeshing type extruder, and (C) component is added from the C2 barrel using a liquid addition device, Surface modifiers (Example products 1-6, Comparative products 1-8) were prepared.
• the degree to which the component (C) added to the surface modifier was chemically bonded (grafted) to the components (A) and (B) was measured by the following method.
• About 1 g of the obtained surface modifier was dissolved in 100 mL of xylene with heat, 50 mL of hexane and 50 mL of methanol were added, and the component (A) and (C) which were chemically bonded or not chemically bonded to the component (C)
• the component (B) was precipitated, the component (C) not chemically bonded to the component (A) and the component (B) was removed by filtration, and the precipitate was separated and dried.
• the dried precipitate and the surface modifier were each subjected to infrared spectrum analysis using FT-IR (model: NICOLET 380; manufactured by Thermo Fisher Scientific) equipped with ATR (model: Smart Orbit; manufactured by Thermo Fisher Scientific).
• FT-IR model: NICOLET 380; manufactured by Thermo Fisher Scientific
• ATR model: Smart Orbit; manufactured by Thermo Fisher Scientific
• grafting efficiency was calculated according to the following formula.
• the grafting efficiency is shown in Table 3.
• Grafting efficiency (%) (absorbance ratio of dried precipitate / absorbance ratio of surface modifier) ⁇ 100
• the obtained surface modifiers (Example products 1 to 6, Comparative products 1 to 8) ( C) Component concentration was added to 2 parts by mass with respect to 100 parts by mass of polyolefin resin, and using an injection molding machine (model: IS-55EPN; manufactured by Toshiba), barrel temperature was 220 ° C, mold temperature Injection molding was carried out at 40 ° C. to produce flat resin (80 mm ⁇ 100 mm ⁇ 2 mm) polyolefin resin composition molded products (prototypes 1 to 14). Further, as a target product, a polyolefin resin composition molded product (prototype 15) was produced by performing the same operation except that no surface modifier was added.
• 10 to 14 agglomerates ⁇ Many agglomerates and slightly dirty appearance. 5 to 9 agglomerates: ⁇ Fewer agglomerates and clean appearance. 2-4 agglomerates: ⁇ There is almost no agglomerates and the appearance is very clean. 0 to 1 agglomerates: ⁇ No appearance of agglomerates and a very clean appearance.
• Water repellency is determined by measuring the contact angle of the surface of the obtained polyolefin resin composition molded product (prototypes 1 to 15) with a contact angle meter (model: CA-X; Kyowa Interface Science). The water-repellent effect was evaluated by comparison with a polyolefin resin composition molded product (prototype 15) to which no surface modifier was added. Here, the water repellency indicates that the larger the contact angle value, the better the water repellency. Further, the continuous water repellency was evaluated by measuring the contact angle before and after the cleaning operation and comparing the numerical values. Here, the continuous water repellency indicates that the water repellency is continuous when there is no difference in the contact angle before and after the cleaning operation. The washing operation was performed by wiping the surface of the polyolefin resin composition molded product (prototypes 1 to 15) 10 times with absorbent cotton soaked with methyl ethyl ketone. The results are shown in Table 3.
• the polyolefin-based resin composition molded article using the example product had continuous water repellency and the appearance was clean.
• Prototypes 7 to 9 and 14 using comparative products were agglomerated and had a dirty appearance.
• the prototype 10 using the comparative example product did not have water repellency.
• Prototypes 11 to 13 using comparative products did not have continuous water repellency.

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