JP2016183280A - Polypropylene resin composition for automobile components and molding thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a polypropylene resin composition for automobile components that has excellent flowability, and also excellent glass fogging property although there is no need for a heat treatment step, and a molding thereof.SOLUTION: A polypropylene resin composition for automobile components comprises a component (A) satisfying a specific condition (propylene polymer) 100 pts.wt., and a component (B) satisfying a specific condition (B-1) (organic peroxide with a theoretical active oxygen volume of 10% or more) 0.01-1 pts.wt. relative to the component (A) 100 pts.wt.SELECTED DRAWING: None

Description

  The present invention relates to a polypropylene resin composition for automobile parts and a molded article thereof, and more particularly relates to a polypropylene resin composition for automobile parts and a molded article thereof having good fluidity and glass sagability (fogging property).

Polypropylene-based resin compositions are widely used as resin materials with excellent physical properties, fluidity, recyclability, and economic efficiency, especially automotive parts such as instrument panels and pillars, and electrical equipment parts such as televisions and vacuum cleaners. In such fields, polypropylene resin compositions such as polypropylene resins, and composite polypropylene resins in which fillers such as glass fibers and talc and elastomers (rubbers) are reinforced with polypropylene resins are used for fluidity, physical property balance, recyclability, etc. Since it is excellent in economy and the like, it is widely used in various fields including the molded body.
In particular, in the field of automobile parts, the size and thickness have been increasingly increased, and there is a demand for a resin composition having excellent flowability and corresponding fluidity. In addition, in the case of a passenger car, the temperature inside the closed car becomes high under hot weather in the summer, but the surface of the instrument panel and door trim is exposed to direct sunlight although it is through glass, and reaches a considerably high temperature. . In particular, in recent designs, windshields tend to become larger, and accordingly, the temperature inside the closed car under the hot summer sun is getting higher. Under such circumstances, fogging, that is, a phenomenon in which the low molecular weight volatile substances contained in the resin composition of the instrument panel and door trim volatilize and sublimate at high temperature and adhere to the windshield or the like to fog the glass. It becomes a problem.

  In a resin composition used in the field of automobile parts, for example, in Patent Document 1, a rubber compound used in lamp seal rubber packings and meter packings such as head lamps and fog lamps in automobiles and motorcycles is softened. It is described that low volatile components such as an agent, an internal mold release agent, a vulcanizing agent, a decomposed product of the vulcanizing agent, and an activator cause a fogging phenomenon.

  Patent Document 2 also discloses that olefinic thermoplastic elastomers for automotive interior parts are subjected to dynamic heat treatment in the presence of a crosslinking agent and then statically heat-treated under specific conditions to remove low-volatile components. It has been proposed to do. However, although this method has good fogging properties, it requires a heat treatment step, and it goes without saying that the operation becomes complicated as the number of steps increases.

  As described in Patent Document 2 above, an organic peroxide is used as one of the crosslinking agents for the olefinic thermoplastic elastomer. Other uses of organic peroxides include the production of low density polyethylene (LDPE), polyvinyl chloride (PVC), polystyrene (PS), ABS and other copolymer resins, and polymethyl methacrylate (PMMA). Polymerization initiators, curing agents such as unsaturated polyester resins and vinyl ester resins, and use as grafting agents such as maleic anhydride, but are particularly used as flow modifiers in polypropylene resin compositions. ing.

As a polypropylene resin composition using an organic peroxide as a fluidity modifier, for example, Patent Document 3 includes component (A): ethylene having an ethylene content of 2.0% to 5.0% by weight. Propylene random copolymer, component (B): inorganic filler, component (C): styrene / ethylene / propylene block copolymer rubber, component (D): each component of ethylene / α-olefin copolymer rubber A resin composition for automobile fenders obtained by melting and kneading a mixture containing 0.02 to 0.08 parts by weight of a molecular weight depressant with respect to 100 parts by weight of a component has been proposed.
Further, Patent Document 4 discloses (A) a resin component (a-1) having a propylene polymer / block component having an isotactic pentad fraction (P) of 96% or more, and fibers (a-2). And (B) an ethylene / α-olefin copolymer (b-1) and an ethylene / α-olefin block copolymer having an ethylene polymer block component having a melting temperature of 80 to 120 ° C. A fiber-containing resin composition is proposed that includes a coalescence (b-2), and the content of the copolymer (b-1) relative to the copolymer (b-2) is in the range of 1 to 5. (A-1) A method of melt kneading by adding 0.1 to 1 part by weight of an unsaturated carboxylic acid or anhydride and 0.01 to 0.5 part by weight of an organic peroxide to 100 parts by weight Is illustrated.
However, no consideration has been given to fogging in these cases, and there is a concern that fogging may occur due to low-volatile components and organic peroxide residues generated by using organic peroxides.

  As described above, in the polypropylene resin composition and the molded product thereof, an organic peroxide has been used to improve the fluidity. However, the residue of the organic peroxide deteriorates the fogging property. There has been no study to improve these characteristics at the same time.

JP 2000-239465 A JP 2001-316535 A JP 2001-2114014 A JP 2005-023215 A

  An object of the present invention is to provide a polypropylene resin composition for automobile parts that has excellent fluidity and has good glass sagability even though a heat treatment step is unnecessary, in view of the above-mentioned problems of the prior art, and molded articles thereof. Is to provide.

  In order to solve the above-mentioned problems, the present inventors have conducted extensive research and as a result, contain a specific component (A) (propylene-based polymer) and a specific component (B) (organic peroxide). The present inventors have found that a polypropylene resin composition and a molded body using the same can solve the above-mentioned problems, and have completed the present invention based on these findings.

That is, according to 1st invention of this invention, with respect to 100 weight part of component (A) which satisfies the following conditions (A-1) and (A-2), and 100 weight part of component (A), A polypropylene resin composition for automobile parts, comprising 0.01 to 1 part by weight of component (B) that satisfies the above condition (B-1).
Condition (A-1)
Component (A) is at least one propylene polymer selected from the group consisting of a propylene homopolymer, a propylene-α-olefin random copolymer, and a propylene-α-olefin block copolymer.
Condition (A-2)
Component (A) has a melt flow rate (230 ° C., 2.16 kg load) of 0.1 to 200 g / 10 min.
Condition (B-1)
Component (B) is an organic peroxide having a theoretical active oxygen content of 10% or more.

  Moreover, according to the 2nd invention of this invention, the polypropylene-type resin composition for motor vehicle parts whose component (B) is a dialkyl peroxide in 1st invention is provided.

According to the third invention of the present invention, in the first or second invention, 5 to 100 parts by weight of the component (C) satisfying the following condition (C-1) with respect to 100 parts by weight of the component (A). A polypropylene resin composition for automobile parts further containing parts is provided.
Condition (C-1)
Component (C) is at least one inorganic filler selected from the group consisting of talc, mica, calcium carbonate, whiskers, glass fibers, and carbon fibers.

According to the fourth invention of the present invention, in any one of the first to third inventions, the following conditions (D-1) to (D-3) are satisfied with respect to 100 parts by weight of the component (A). There is provided a polypropylene resin composition for automobile parts further containing 5 to 100 parts by weight of component (D).
Condition (D-1)
Component (D) is an ethylene-α-olefin copolymer obtained by copolymerizing ethylene and an α-olefin having 3 to 8 carbon atoms.
Condition (D-2)
The component (D) has a density of 0.86 to 0.92 g / cm ³ .
Condition (D-3)
The melt flow rate (230 degreeC, 2.16kg load) of a component (D) is 0.5-100 g / 10min.

  Moreover, according to 5th invention of this invention, the molded object formed by shape | molding the polypropylene resin composition for motor vehicle parts of the invention in any one of 1st-4th is provided.

Since the polypropylene resin composition for automobile parts and the molded body thereof according to the present invention have good fluidity, they are excellent in molding processability and can be thinned. Furthermore, the glass sagability is good even at high temperatures.
Therefore, instrument panels, door trims, glove boxes, console boxes, armrests, grip knobs, various trims, ceiling parts, housings, pillars, mudguards, bumpers, fenders, back doors, fan shrouds, various lamp housings, In various automotive parts such as lamps, it can be used widely and suitably for interior parts and exterior parts.

The present invention contains a specific component (A) (propylene polymer) and a specific component (B) (organic peroxide) in a specific ratio, preferably a specific component (C) (inorganic filler). And a specific component (D) (ethylene-α-olefin copolymer) at a specific ratio, and a propylene-based resin composition for automobile parts, or a molded body formed by molding the same.
Hereinafter, each component used in the present invention, the resulting propylene-based resin composition for automobile parts, and the formed body will be described in detail.

1. Ingredient (A)
The component (A) used in the present invention satisfies the following conditions (A-1) and (A-2).
Condition (A-1)
Component (A) is at least one propylene polymer selected from the group consisting of a propylene homopolymer, a propylene-α-olefin random copolymer, and a propylene-α-olefin block copolymer.
Condition (A-2)
Component (A) has a melt flow rate (hereinafter sometimes abbreviated as MFR) (230 ° C., 2.16 kg load) of 0.1 to 200 g / 10 min.

1-1. Condition (A-1)
Component (A) used in the present invention is at least one polypropylene polymer selected from the group consisting of a propylene homopolymer, a propylene-α-olefin random copolymer and a propylene-α-olefin block copolymer. is there. (Hereinafter, the propylene-α-olefin block copolymer and the propylene-α-olefin random copolymer may be simply referred to as “propylene-α-olefin copolymer” in the present specification). In this regard, when the resin composition of the present invention is used, the balance of mechanical properties such as rigidity and impact resistance is improved, so that it is preferable to use a propylene-α-olefin copolymer.

  When a propylene-α-olefin copolymer is used in the present invention, the propylene-α-olefin copolymer preferably used is a copolymer comprising propylene and ethylene or an α-olefin having 4 to 8 carbon atoms as a comonomer. It is a polymer. Usually, a random copolymer or block of propylene and an α-olefin having a propylene content of 70 to 99% by weight (that is, a comonomer content of 0.01 to 30% by weight), more preferably a propylene content of 90% by weight or more. It is a copolymer. Moreover, the mixture of the random copolymer or block copolymer from which an alpha olefin differs may be sufficient.

Moreover, 1 type may be used for the comonomer which is ethylene or the C4-C8 alpha olefin copolymerized with propylene, and may be used in combination of 2 or more type.
Specific examples of the propylene-α-olefin copolymer include propylene-ethylene copolymer, propylene-butene-1 copolymer, propylene-pentene-1 copolymer, propylene-hexene-1 copolymer, propylene. -Binary copolymers such as octene-1 copolymer, terpolymers such as propylene-ethylene-butene-1 copolymer, propylene-ethylene-hexene-1 copolymer, etc. A propylene-ethylene random copolymer, a propylene-ethylene block copolymer, a propylene-ethylene-butene-1 random copolymer, and the like are preferable. The content of the α-olefin monomer in the propylene-α-olefin copolymer is usually about 0.01 to 30% by weight, preferably 1 to 30% by weight, more preferably about 1 to 10% by weight. be able to.

Examples of the comonomer ethylene or α-olefin having 4 to 8 carbon atoms include ethylene, 1-butene, 2-methyl-1-propene, 1-pentene, 2-methyl-1-butene, and 3-methyl-1. -Butene, 1-hexene, 2-ethyl-1-butene, 2,3-dimethyl-1-butene, 2-methyl-1-pentene, 3-methyl-1-pentene, 4-methyl-1-pentene, 3 , 3-dimethyl-1-butene, 1-heptene, methyl-1-hexene, dimethyl-1-pentene, ethyl-1-pentene, trimethyl-1-butene, 1-octene and the like. Among these, ethylene and 1-butene are preferable from the viewpoint of easy handling and availability when the component (A) is used, and good physical property balance when the resin composition of the present invention is used. Ethylene is preferred from the standpoints of easy availability when used as the component (A) and good physical property balance when used as the resin composition of the present invention.
That is, in the present invention, as the component (A), it is preferable to use at least one selected from the group consisting of a propylene-ethylene random copolymer and a propylene-ethylene block copolymer for the above reasons.

  The production of the component (A) used in the present invention is not particularly limited, and a metallocene catalyst, a Ziegler catalyst, or the like can be used. However, in the polymerization by the gas phase method, when a Ziegler type catalyst is used, a polymer having a wide molecular weight distribution and containing a large amount of low molecular weight components soluble in a solvent such as n-decane or paraxylene is obtained. Since these low molecular weight components are not preferable because they cause deterioration of physical properties such as fogging property, the use of metallocene catalysts generally results in a narrow molecular weight distribution of the component (A), which is a by-product of low molecular weight components. Is suppressed from the viewpoint of glass stagnation.

(I) Metallocene catalyst The metallocene catalyst is not particularly limited as long as the component (A) used in the present invention can be produced. In order to satisfy the requirements of the present invention, for example, the following is shown. It is preferable to use a metallocene catalyst comprising such components (a) and (b) and component (c) used as necessary.
Component (a): at least one metallocene transition metal compound selected from transition metal compounds represented by the following general formula (1).
Component (b): at least one solid component selected from the following (b-1) to (b-4).
(B-1): A particulate carrier on which an organic aluminum oxy compound is supported.
(B-2): A particulate carrier carrying an ionic compound or Lewis acid capable of reacting with component (a) to convert component (a) into a cation.
(B-3): Solid acid fine particles.
(B-4): Ion exchange layered silicate.
Component (c): an organoaluminum compound.

As the component (a), at least one metallocene transition metal compound selected from transition metal compounds represented by the following general formula (1) can be used.
^{_{Q (C 5 H 4 -aR 1}} a) (C 5 H 4 -bR 2 b) MeXY (1)

Here, Q represents a divalent binding group that bridges two conjugated five-membered ring ligands, and has, for example, a divalent hydrocarbon group, a silylene group, an oligosilylene group, or a hydrocarbon group as a substituent. Examples thereof include a silylene group, an oligosilylene group, and a germylene group having a hydrocarbon group as a substituent. Among these, preferred is a silylene group having a divalent hydrocarbon group and a hydrocarbon group as a substituent.
X and Y each represents a hydrogen atom, a halogen atom, a hydrocarbon group, an alkoxy group, an amino group, a nitrogen-containing hydrocarbon group, a phosphorus-containing hydrocarbon group, or a silicon-containing hydrocarbon group. , Chlorine, methyl, isobutyl, phenyl, dimethylamide, diethylamide group and the like. X and Y may be independent, that is, may be the same or different.
R1 and R2 represent hydrogen, a hydrocarbon group, a halogenated hydrocarbon group, a silicon-containing hydrocarbon group, a nitrogen-containing hydrocarbon group, an oxygen-containing hydrocarbon group, a boron-containing hydrocarbon group, or a phosphorus-containing hydrocarbon group. . Specific examples of the hydrocarbon group include a methyl group, an ethyl group, a propyl group, a butyl group, a hexyl group, an octyl group, a phenyl group, a naphthyl group, a butenyl group, and a butadienyl group. In addition, as halogenated hydrocarbon group, silicon-containing hydrocarbon group, nitrogen-containing hydrocarbon group, oxygen-containing hydrocarbon group, boron-containing hydrocarbon group, or phosphorus-containing hydrocarbon group, methoxy group, ethoxy group, phenoxy group Typical examples include trimethylsilyl group, diethylamino group, diphenylamino group, pyrazolyl group, indolyl group, dimethylphosphino group, diphenylphosphino group, diphenylboron group, and dimethoxyboron group. In these, it is preferable that it is a C1-C20 hydrocarbon group, and it is especially preferable that they are a methyl group, an ethyl group, a propyl group, and a butyl group. By the way, adjacent R1 and R2 may combine to form a ring, on which a hydrocarbon group, halogenated hydrocarbon group, silicon-containing hydrocarbon group, nitrogen-containing hydrocarbon group, oxygen-containing hydrocarbon A substituent comprising a group, a boron-containing hydrocarbon group, or a phosphorus-containing hydrocarbon group.
Me is a metal atom selected from titanium, zirconium and hafnium, preferably zirconium and hafnium.
Note that a and b are the number of substituents.

Among the components (a) described above, preferred for the production of the component (A) used in the present invention is a substituted cyclopentadiazine crosslinked with a silylene group, a germylene group or an alkylene group having a hydrocarbon substituent. It is a transition metal compound comprising a ligand having an enyl group, a substituted indenyl group, a substituted fluorenyl group, or a substituted azulenyl group, and particularly preferably 2,4 crosslinked by a silylene group having a hydrocarbon substituent or a gelmylene group It is a transition metal compound comprising a ligand having a -position substituted indenyl group and a 2,4-position substituted azulenyl group.
Non-limiting specific examples include dimethylsilylene bis (2-methyl-4-phenylindenyl) zirconium dichloride, diphenylsilylene bis (2-methyl-4-phenylindenyl) zirconium dichloride, dimethylsilylene bis (2-methyl). Benzoindenyl) zirconium dichloride, dimethylsilylenebis {2-isopropyl-4- (3,5-diisopropylphenyl) indenyl} zirconium dichloride, dimethylsilylenebis (2-propyl-4-phenanthrylindenyl) zirconium dichloride, dimethyl Silylene bis (2-methyl-4-phenylazurenyl) zirconium dichloride, dimethylsilylene bis {2-methyl-4- (4-chlorophenyl) azurenyl} zirconium dichloride, dimethylsilylene bi (2-Ethyl-4-phenylazurenyl) zirconium dichloride, dimethylsilylenebis (2-isopropyl-4-phenylazurenyl) zirconium dichloride, dimethylsilylenebis {2-ethyl-4- (2-fluorobiphenyl) azurenyl} zirconium Examples thereof include dichloride and dimethylsilylenebis {2-ethyl-4- (4-t-butyl-3-chlorophenyl) azurenyl} zirconium dichloride. A compound in which the silylene group of these specific examples is replaced with a germylene group and zirconium is replaced with hafnium is also exemplified as a suitable compound. In addition, since the catalyst component is not an important element of the present invention, it avoids complicated listing and is limited to a representative example, but it is obvious that the effective range of the present invention is not limited thereby. It is.

As the component (b), at least one solid component selected from the aforementioned components (b-1) to (b-4) is used. Each of these components is a well-known thing, and can be used selecting it suitably from well-known techniques. Specific examples and manufacturing methods thereof are described in detail in JP-A No. 2002-284808, JP-A No. 2002-53609, JP-A No. 2002-69116, JP-A No. 2003-105015, and the like.
Among the components (b), particularly preferable is the ion-exchange layered silicate of the component (b-4), and more preferable are chemical treatments such as acid treatment, alkali treatment, salt treatment, and organic matter treatment. Is an ion-exchange layered silicate.

Examples of the organoaluminum compound used as the component (c) as necessary include the following general formula (2)
AlRaP ₃ -a (2)
(Wherein R is a hydrocarbon group having 1 to 20 carbon atoms, P is hydrogen, halogen or alkoxy group, a is a number of 0 <a ≦ 3), trimethylaluminum, triethylaluminum, Trialkylaluminum such as tripropylaluminum and triisobutylaluminum or halogen- or alkoxy-containing alkylaluminum such as diethylaluminum monochloride and diethylaluminum monomethoxide. In addition, aluminoxanes such as methylaluminoxane can also be used. Of these, trialkylaluminum is particularly preferred.

  As a method for forming the catalyst, the component (a), the component (b) and, if necessary, the component (c) are brought into contact with each other to form a catalyst. In addition, the contact method will not be specifically limited if it is a method which can form a catalyst, A well-known method can be used.

Moreover, the usage-amount of component (a), (b), and (c) is arbitrary. For example, the amount of component (a) used relative to component (b) is preferably in the range of 0.1 to 1,000 μmol, particularly preferably 0.5 to 500 μmol, relative to 1 g of component (b). The amount of component (c) used relative to component (b) is preferably such that the amount of transition metal is 0.001 to 100 μmol, particularly preferably 0.005 to 50 μmol, relative to 1 g of component (b).
Furthermore, it is preferable that the catalyst used in the present invention is subjected to a prepolymerization treatment in which a small amount of polymer is brought into contact with an olefin in advance.

  As the component (A) obtained by the action of the metallocene catalyst, a commercially available product can be used. For example, Wintech, Wellnex series manufactured by Nippon Polypro Co., Ltd. can be preferably used.

(Ii) Ziegler catalyst The component (A) can be produced using a Ziegler catalyst or the like. As the Ziegler catalyst, titanium trichloride or titanium trichloride composition obtained by reducing titanium tetrachloride with organoaluminum or the like is treated with an electron donating compound and further activated (for example, JP-A-47-34478). JP, 58-23806, JP 63-146906), titanium trichloride composition obtained by reducing titanium tetrachloride with an organoaluminum compound and then treating with various electron donors and electron acceptors. And a catalyst comprising an organoaluminum compound and an aromatic carboxylic acid ester (see JP-A 56-100806, JP-A 56-120712, JP-A 58-104907), and halogenation Supported catalysts comprising magnesium tetrachloride and various electron donors on magnesium (JP 57-63310, JP 58-157808, JP No. 58-83006, JP-58-5310, JP-61-218606, JP-A-63-43915, see the JP-A No. 63-83116) and the like can be exemplified.

  As the component (A) obtained by the action of the Ziegler catalyst, a commercially available product can be used. For example, Novatec series manufactured by Nippon Polypro Co., Ltd. can be suitably used.

(Iii) Polymerization process As an operation method over time, either a batch method or a continuous method can be used, but it is generally desirable to use a continuous method from the viewpoint of productivity. As polymerization methods, slurry polymerization using an inert hydrocarbon such as hexane, heptane, octane, benzene or toluene as a polymerization solvent, bulk polymerization using propylene itself as a polymerization solvent, or polymerization of raw material propylene in a gas phase state Gas phase polymerization is possible. Moreover, it is also possible to carry out by combining these polymerization formats.

The polymerization temperature can be used without any particular problem as long as it is within a commonly used temperature range. Specifically, a range of 0 ° C. to 200 ° C., more preferably 40 ° C. to 100 ° C. can be used.
The polymerization pressure varies depending on the process to be selected, but the optimum pressure can be used without any problem as long as it is in a pressure range usually used. Specifically, the relative pressure with respect to atmospheric pressure can be greater than 0 MPa and up to 200 MPa, more preferably in the range of 0.1 MPa to 50 MPa. At this time, an inert gas such as nitrogen may coexist.
Moreover, when using hydrogen as a molecular weight modifier, it can be used in 1.0 * 10 <-6> or more and 1.0 * 10 <-2> or less by molar ratio with respect to propylene. Preferably, it is 1.0 × 10 −5 or more and 0.9 × 10 −2 or less.

1-2. Condition (A-2)
The MFR (230 ° C., 2.16 kg load) of the component (A) used in the present invention is 0.1 to 200 g / 10 minutes, preferably 0.5 to 150 g / 10 minutes, more preferably 1 to 100 g. / 10 minutes. When the MFR is within the above range, impact resistance is good and fluidity improvement by the component (B) described later is more effective, which is preferable. That is, if the MFR is less than 0.1 g / 10 minutes, the fluidity improvement by the component (B) may be insufficient. Moreover, when MFR exceeds 200 g / 10min, there exists a possibility that the impact resistance of a resin composition and its molded object may fall.
MFR conforms to JIS K7210, test temperature = 230 ° C., load = 2.16.
It is a value measured in kg.

2. Ingredient (B)
The component (B) used in the present invention satisfies the following condition (B-1).
Condition (B-1)
Component (B) is an organic peroxide having a theoretical active oxygen content of 10% or more.

2-1. Condition (B-1)
The theoretical active oxygen amount is represented by the following general formula (3).
Theoretical active oxygen amount (%) = (16 × number of peroxide bonds) / molecular weight × 100 (3)
That is, the theoretical active oxygen amount is an index indicating the number of free radicals to be generated, expressed as a percentage obtained by dividing the atomic weight of active oxygen of a 100% pure organic peroxide by the molecular weight of the organic peroxide. .

  The structure of the organic peroxide that can be used as the component (B) is not particularly limited. For example, depending on the chemical structure, ketone peroxide, peroxyketal, hydroperoxide, dialkyl peroxide, diacyl peroxide, peroxyester Although it is classified as peroxydicarbonate, etc., it is suitable for improving the fluidity of polypropylene-based resin compositions, and it has a good effect of modification. From the viewpoint of being, for example, dialkyl peroxides and peroxyketals are preferable, and dialkyl peroxides are particularly preferable because they are excellent in these effects.

  Specific preferred components (B) include di-t-butyl peroxide, 2,5-dimethyl 2,5-di (t-butylperoxy) hexane, 2,5-dimethyl 2,5-di (t-butylperoxy). ) Hexin-3, 1,1-di (t-hexylperoxy) cyclohexane, 1,1-di (t-butylperoxy) cyclohexane, 1,1-di (t-amylperoxy) cyclohexane, 2,2-di ( Examples thereof include t-butylperoxy) butane and 1,1-di (t-butylperoxy) -2-methylcyclohexane.

  These components (B) are not limited to pure products (liquid form) but can also be diluted products (powder form) with hydrocarbons or inert solids.

  Specific examples of commercially available products of these components (B) include Perhexa 25B, Perbutyl D, Perhexine 25B, Perhexa MC, Perhexa HC, Perhexa C, Perhexa 22, manufactured by NOF Corporation, RUBEROX 101, RUBEROX DI manufactured by Arkema Yoshitomi , Revelox 130, Revelox 531, Revelox 331, Revelox 220, etc., and desired products can be purchased and used.

2-2. Content Ratio The content ratio of the component (B) used in the present invention is 0.01 to 1 part by weight, preferably 0.03 to 0.5 part by weight, more preferably 100 parts by weight of the component (A). 0.05 to 0.3 parts by weight. If the content rate of a component (B) is in said range, the fluidity improvement of a resin composition will fully be achieved, without the glass sag property deteriorating with the residue. That is, when the content ratio of the component (B) is less than 0.01 parts by weight, the flowability of the resin composition is insufficiently improved. May get worse.

3. Ingredient (C)
The component (C) used in the present invention preferably satisfies the following condition (C-1).
Condition (C-1)
The component (C) used in the present invention has a characteristic of imparting rigidity in the resin composition and molded article of the present invention.

3-1. Condition (C-1)
Component (C) used in the present invention is at least one inorganic filler selected from the group consisting of talc, mica, calcium carbonate, whiskers, glass fibers, and carbon fibers. There is no restriction | limiting in particular about the shape of a component (C), A thing of any shape, such as a granular form, plate shape, rod shape, fiber shape, and a whisker shape, can be used. These are often produced in the form of a compressed soul, pellet (granulated), granule, chopped strand, etc. with improved handling convenience, and any of them can be used. Moreover, what is marketed as a filler for polymers can use all.

(1) Talc, mica, calcium carbonate The talc, mica, and calcium carbonate used in the present invention are not particularly limited, and those having desired physical properties can be used according to the purpose of use.
The average particle size of talc, mica and calcium carbonate used in the present invention is easy to obtain a propylene-based resin composition and a molded article that are particularly excellent in balance between physical properties such as fluidity, dimensional stability, rigidity, and economy. In this respect, it is preferably 0.1 μm or more and 15 μm or less, more preferably 0.5 to 10 μm, and further preferably 2 to 8 μm.
The average particle diameter is a value measured using a laser diffraction / scattering particle size distribution analyzer or the like, and examples of the measuring apparatus include Horiba LA-920 type. Further, talc, mica and calcium carbonate preferably have an average aspect ratio of 4 or more and 20 or less, more preferably 5 or more and 10 or less. The measurement of the aspect ratio of talc, mica and calcium carbonate is obtained by calculation using the average particle diameter measured by the above method and the average thickness value measured by a microscope or the like.

The talc, mica and calcium carbonate used in the present invention are those produced by mechanically pulverizing naturally produced or industrially synthesized one or more times. It can be obtained by classification.
Examples of the pulverizer include a jaw crusher, a hammer crusher, a roll crusher, a screen mill, a jet pulverizer, a colloid mill, a roller mill, and a vibration mill. These pulverized talc, mica and calcium carbonate are adjusted to 1 in an apparatus such as a cyclone, a cyclone air separator, a micro separator, a cyclone air separator, and a sharp cut separator to adjust the average particle size shown above. What is necessary is just to perform the wet or dry classification once or repeatedly. That is, after pulverizing to a specific particle size, a classification operation can be performed with a sharp cut separator.
Moreover, since various products are commercially available from many companies for talc, mica and calcium carbonate used in the present invention, desired commercial products can be purchased and used.

(2) Whisker Whisker used in the present invention is not particularly limited, and examples thereof include basic magnesium sulfate fiber, potassium titanate fiber, aluminum borate fiber, calcium silicate fiber, calcium carbonate fiber, and ultrafine carbon fiber. The thickness of the whisker used in the present invention is usually an extremely fine and fibrous shape of 2 μmφ or less, particularly 1 μmφ or less.

(3) Glass fiber The glass fiber used in the present invention can be used without particular limitation. Examples of the glass used in the fiber include E glass, C glass, A glass, and S glass. Among them, E glass is preferable. The manufacturing method of glass fiber is not specifically limited, It manufactures with various well-known manufacturing methods.
Two or more glass fibers can be used in combination.

The glass fiber length is preferably 2 to 20 mm, and more preferably 3 to 10 mm. If the glass fiber length is within the above range, the rigidity can be sufficiently improved without lowering the fluidity of the resin composition and the molded body thereof. That is, if the fiber length is less than 2 mm, the rigidity of the resin composition and the molded body thereof may not be sufficiently improved, while if it exceeds 20 mm, the fluidity may be reduced.
In the present specification, the fiber length represents the length in the case where the glass fiber before melt kneading is used as a raw material as it is in the case of normal roving-like or strand-like fiber. However, in the case of a glass fiber-containing pellet obtained by melt-extrusion processing, which will be described later, and a plurality of continuous glass fibers assembled together, the length of one side of the pellet (extrusion direction) is substantially the length of the fiber in the pellet Therefore, the length of one side (extrusion direction) of the pellet is defined as the fiber length.
Here, “substantially” specifically refers to the length of the carbon fiber-containing pellet when the length is 50% or more, preferably 90% or more, based on the total number of fibers in the fiber-containing pellet. It is the same as (extrusion direction) and means that the fiber is hardly broken during the pellet preparation.

In addition, in this specification, fiber length is calculated | required by measuring with a microscope and calculating the average value of the length of 100 or more fibers.
For example, in the case of glass fiber, the resin composition of the present invention is burned and incinerated to obtain only glass fiber as a residue, and the obtained glass fiber is mixed with surfactant-containing water, After the mixed aqueous solution is dropped and diffused on a thin glass plate, a length of 100 or more glass fibers is measured using a digital microscope (for example, VHX-900 manufactured by Keyence Corporation), and an average value thereof is calculated.

Further, the fiber diameter of the glass fiber is preferably 3 to 25 μm, more preferably 6 to 20 μm. If the fiber diameter of the glass fiber is within the above range, the glass fiber is not easily broken during the production and molding of the resin composition and its molded body, and the rigidity of the resin composition and the molded body is sufficiently improved. Achieved. That is, if the fiber diameter is less than 3 μm, the glass fiber may be easily broken at the time of production and molding of the resin composition and the molded product thereof. On the other hand, if the fiber diameter exceeds 25 μm, the aspect ratio of the fiber decreases. Along with this, there is a possibility that the rigidity of the resin composition and the molded body thereof is not sufficiently improved.
The fiber diameter is obtained by cutting the fiber perpendicular to the fiber length direction, measuring the diameter by observing the cross section under a microscope, and calculating the average value of the diameters of 100 or more fibers.

  The glass fiber can be either surface-treated or non-treated, but for improving dispersibility in polypropylene resin, etc., an organic silane coupling agent, titanate coupling agent, aluminate It is preferable to use one that has been surface-treated with a coupling agent, a zirconate coupling agent, a silicone compound, a higher fatty acid, a fatty acid metal salt, a fatty acid ester, or the like.

  Glass fibers may be used that have been focused (surface) treated with a sizing agent. Epoxy sizing agents, aromatic urethane sizing agents, aliphatic urethane sizing agents, acrylics may be used. Examples thereof include a system sizing agent and a maleic anhydride-modified polyolefin sizing agent. Since these sizing agents need to be melted in the melt-kneading with the polypropylene resin, it is preferable that they are melted at 200 ° C. or lower.

  The glass fiber can be either surface-treated or non-treated, but for improving dispersibility in polypropylene resin, etc., an organic silane coupling agent, titanate coupling agent, aluminate It is preferable to use one that has been surface-treated with a coupling agent, a zirconate coupling agent, a silicone compound, a higher fatty acid, a fatty acid metal salt, a fatty acid ester, or the like.

  Examples of the organic silane coupling agent used for the surface treatment include vinyltrimethoxysilane, γ-chloropropyltrimethoxysilane, γ-methacryloxypropyltrimethoxysilane, γ-aminopropyltrimethoxysilane, and 3-acryloxypropyl. And trimethoxysilane. Examples of titanate coupling agents include isopropyl triisostearoyl titanate, isopropyl tris (dioctyl pyrophosphate) titanate, and isopropyl tri (N-aminoethyl) titanate. Moreover, as an aluminate coupling agent, acetoalkoxy aluminum diisopropylate etc. can be mentioned, for example. Examples of the zirconate coupling agent include tetra (2,2-diallyloxymethyl) butyl, di (tridecyl) phosphitozirconate; neopentyl (diallyl) oxy, and trineodecanoyl zirconate. Examples of the silicone compound include silicone oil and silicone resin.

  Furthermore, examples of the higher fatty acid used for the surface treatment include oleic acid, capric acid, lauric acid, palmitic acid, stearic acid, montanic acid, kaleic acid, linoleic acid, rosin acid, linolenic acid, undecanoic acid, and undecenoic acid. Is mentioned. Examples of the higher fatty acid metal salt include fatty acids having 9 or more carbon atoms, such as sodium salts such as stearic acid and montanic acid, lithium salts, calcium salts, magnesium salts, zinc salts, and aluminum salts. Of these, calcium stearate, aluminum stearate, calcium montanate, and sodium montanate are preferred. Examples of fatty acid esters include polyhydric alcohol fatty acid esters such as glycerin fatty acid esters, alpha sulfone fatty acid esters, polyoxyethylene sorbitan fatty acid esters, sorbitan fatty acid esters, polyethylene fatty acid esters, and sucrose fatty acid esters.

  The glass fiber can also be used as a so-called chopped strand glass fiber obtained by cutting a fiber yarn into a desired length. Among these, from the viewpoints of the rigidity and impact resistance of the resin composition and the molded product thereof, it is possible to use chopped strand-like glass fibers obtained by aligning strands in which glass fibers are converged and cutting them to 2 mm to 20 mm. preferable.

  Specific examples of the glass fiber include Nippon Electric Glass Co., Ltd. (T480H).

In addition, these glass fibers can be used as “glass fiber-containing pellets” by integrating and integrating an arbitrary amount of, for example, component (A) and the like together with a large number of continuous glass fibers by melt extrusion. It is preferable from the viewpoint of further improving each improvement effect such as the rigidity of the composition and the molded body thereof.
In the case of such a glass fiber-containing pellet, as described above, the fiber length is the length of the glass fiber-containing pellet (extrusion direction), and preferably 2 to 20 mm.
The manufacturing method of such a glass fiber containing pellet is not specifically limited, A well-known method can be used.

(4) Carbon fiber The carbon fiber used in the present invention is not particularly limited and can be used. Here, the carbon fiber includes, for example, an ultrafine fiber having a fiber diameter of 500 nm or less, which is also referred to as a fine carbon fiber. Two or more carbon fibers can be used in combination.

The fiber length of the carbon fiber is preferably 1 to 20 mm, and more preferably 3 to 10 mm. If the fiber length of the carbon fiber is within the above range, the rigidity can be sufficiently improved without lowering the fluidity of the resin composition and the molded body thereof. However, when the fiber length is less than 1 mm, the final fiber length in the resin composition and the molded body thereof becomes shorter, and the rigidity of the resin composition and the molded body may not be sufficiently improved. There is a risk of reducing fluidity.
In addition, the length of carbon fiber is measured by the same method as the above-mentioned glass fiber.

Moreover, the fiber diameter of the carbon fiber is preferably 2 to 20 μm, more preferably 3 to 15 μm. If the fiber diameter of the carbon fiber is within the above range, the carbon fiber is not easily broken at the time of production and molding of the resin composition and its molded body, and the rigidity of the resin composition and its molded body is sufficiently improved. Achieved. However, if the fiber diameter is less than 2 μm, the carbon fiber may be easily broken during the production and molding of the resin composition and the molded product thereof. On the other hand, if the fiber diameter exceeds 20 μm, the aspect ratio of the fiber decreases. Along with this, there is a possibility that the rigidity of the resin composition and the molded body thereof is not sufficiently improved.
A fiber diameter is measured by a well-known method, for example, is measured by JIS R7607 (old JIS R7601) or a microscope observation method.

  The type of carbon fiber is not particularly limited as described above. For example, PAN (polyacrylonitrile) carbon fiber mainly composed of acrylonitrile, pitch carbon fiber mainly composed of tar pitch, and rayon carbon fiber. Etc., and all are preferably used. Although these are highly suitable for the present invention, PAN-based carbon fibers are preferred from the viewpoints of composition purity and uniformity. These may be used alone or in combination. In addition, the manufacturing method of these carbon fibers is not specifically limited.

  As specific examples of carbon fiber, in PAN-based carbon fiber, trade name "Pyrofil" manufactured by Mitsubishi Rayon Co., Ltd., trade name "Torayca" manufactured by Toray Industries, Inc., trade name "Beth Fight" manufactured by Toho Tenax Co., etc. Examples of the pitch-based carbon fiber include a product name “DIALEAD” manufactured by Mitsubishi Plastics, a product name “DonaCarbo” manufactured by Osaka Gas Chemicals, and a product name “Kureka” manufactured by Kureha Chemicals.

In addition, these carbon fibers are similar to the above-mentioned glass fibers, in which an arbitrary amount of, for example, the component (A) and the like, and a plurality of continuous carbon fibers that have been melt-extruded are integrated together. It can also be used as a “pellet”, which is preferable from the viewpoint of further improving each improvement effect such as the rigidity of the resin composition and the molded body thereof.
In the case of such a carbon fiber-containing pellet, as described above, the length of the carbon fiber is the length of the carbon fiber-containing pellet (extrusion direction), and is preferably 2 to 20 mm.

Carbon fibers usually have a tensile modulus of about 200 to 1000 GPa, but in the present invention, it is preferable to use those having a tensile modulus of 200 to 900 GPa because of the rigidity and economy of the resin composition of the present invention and the molded product thereof. More preferably, 200 to 300 GPa is used.
Moreover, although carbon fiber has a density of about 1.7-5 g / cm < ³ > normally, it is preferable to use what has a density of 1.7-2.5 g / cm < ³ > from lightness, economical efficiency, etc.
Here, the tensile modulus and density are measured by known methods. For example, the tensile modulus can be JIS R7606 (former JIS R7601), and the density can be JIS R7603 (former JIS R7601). Can be mentioned.

These carbon fibers can be used as so-called chopped (strand-like) carbon fibers (hereinafter also simply referred to as CCF) obtained by cutting the fiber yarn into a desired length, and various sizing agents can be used as necessary. It is also possible to use a focusing process. In the present invention, this CCF is preferably used in order to further enhance the effects of improving physical properties such as rigidity in the resin composition and the molded body thereof.
As specific examples of such CCF, in the case of PAN-based carbon fiber, the product name “Pyrofil Chop” manufactured by Mitsubishi Rayon Co., Ltd., the product name “Torayca Chop” manufactured by Toray Industries, Inc., the product name “Besfight Chop” manufactured by Toho Tenax Co., Ltd., etc. For pitch-based carbon fiber, the product name “Dialead Chopped Fiber” manufactured by Mitsubishi Plastics Co., Ltd., the product name “Donna Carbo Chop” manufactured by Osaka Gas Chemical Company, and the product name “Kureka Chop” manufactured by Kureha Chemical Co., Ltd. Can be mentioned.

3-2. Content Ratio The content ratio of the component (C) used in the present invention is preferably 5 to 100 parts by weight, more preferably 10 to 85 parts by weight, and more preferably 20 to 70 parts by weight with respect to 100 parts by weight of the component (A). Parts by weight. If the content rate of a component (C) is in said range, the improvement of rigidity is fully achieved, without reducing the fluidity | liquidity at the time of shape | molding the resin composition of this invention. That is, if the content ratio of the component (C) is less than 5 parts by weight, the rigidity may be insufficiently improved, and if it exceeds 100 parts by weight, the fluidity may decrease.

4). Ingredient (D)
The component (D) used in the present invention preferably satisfies the following conditions (D-1) to (D-3).
Condition (D-1)
Component (D) is an ethylene-α-olefin copolymer obtained by copolymerizing ethylene and an α-olefin having 3 to 8 carbon atoms.
Condition (D-2)
The component (D) has a density of 0.86 to 0.92 g / cm ³ .
Condition (D-3)
The melt flow rate (230 degreeC, 2.16kg load) of a component (D) is 0.5-100 g / 10min.

4-1. Condition (D-1)
Component (D) is an ethylene-α-olefin copolymer obtained by copolymerizing ethylene and an α-olefin having 3 to 8 carbon atoms. Examples of the ethylene-α-olefin copolymer include an ethylene / propylene copolymer elastomer (EPR), an ethylene / butene copolymer elastomer (EBR), an ethylene / hexene copolymer elastomer (EHR), and an ethylene / octene copolymer. A polymer elastomer (EOR) etc. are mentioned.
In particular, when at least one selected from the group consisting of an ethylene / octene copolymer elastomer (EOR), an ethylene / butene copolymer elastomer (EBR) and an ethylene / propylene copolymer elastomer is used, a resin composition and a molded article thereof In view of the above, it is preferable from the viewpoint that the performance such as impact resistance is superior and the economy is also excellent.
In addition, 2 or more types can also be used together for a component (D).

4-2. Condition (D-2)
The density of the component (D) used in the present invention is 0.86 to 0.92 g / cm ³ , preferably 0.865 to 0.91 g / cm ³ , and more preferably 0.87 to 0.90 g. / Cm ³ .
If the density of the component (D) is within the above range, the resin composition of the present invention and the molded product thereof have a sufficient dispersion resistance while maintaining a sufficiently dispersed state with the component (A). The impact property is improved, and it is preferable that the impact by the modification of the component (B) is not easily received. That is, when the density of the component (D) is less than 0.86 g / cm ³ , the component (D) is decomposed by the modification of the component (B), and the modification effect of the component (A) becomes insufficient. There is a concern that the rigidity of the resin composition and the molded body thereof is significantly lowered, and if it exceeds 0.92 g / cm ³ , the impact resistance may be insufficiently improved.

4-3. Condition (D-3)
The MFR (230 ° C., 2.16 kg load) of the component (D) used in the present invention is in the range of 0.5 to 100 g / 10 minutes, preferably 1.5 to 50 g / 10 minutes, more preferably 2 It is in the range of ˜15 g / 10 minutes. If MFR of a component (D) is said range, since impact resistance improves without reducing fluidity, it is preferable. That is, if the MFR of the component (D) is less than 0.5 g / 10 minutes, the fluidity when molding the resin composition may be lowered, and if it exceeds 100 g / 10 minutes, the impact resistance is improved. May become insufficient.

4-4. Production Method Component (D) used in the present invention is produced by polymerizing each monomer in the presence of a catalyst.
Examples of the catalyst include titanium compounds such as titanium halide, organoaluminum-magnesium complexes such as alkylaluminum-magnesium complexes, so-called Ziegler-type catalysts such as alkylaluminum and alkylaluminum chloride, and WO 91/04257 pamphlet. The metallocene compound catalyst can be used.
As the polymerization method, polymerization can be performed by applying a production process such as a gas phase fluidized bed method, a solution method, or a slurry method.
Moreover, since various products of these components (D) are commercially available from many companies, products having desired physical properties can be obtained and used.

4-5. Content Ratio The content ratio of the component (D) used in the present invention is 5 to 100 parts by weight, preferably 10 to 85 parts by weight, more preferably 20 to 70 parts by weight with respect to 100 parts by weight of the component (A). is there. When the content ratio of the component (D) is within the above range, the resin composition and the molded body thereof have good dispersion with the component (A), and the impact resistance is improved while maintaining sufficient rigidity. Therefore, it is preferable. That is, when the content ratio of the component (D) is less than 5 parts by weight, the impact resistance is not sufficiently improved, and when it exceeds 100 parts by weight, the component (D) is sufficiently dispersed in the component (A). In the first place, not only is handling difficult at the time of molding, but also the rigidity may be significantly reduced.

5. Optional Additive Components The resin composition of the present invention can contain various optional additive components such as a lubricant and an antioxidant as long as the effects of the present invention are not significantly impaired.
Two or more optional additional components may be used in combination, may be added to the resin composition, or may be added in advance to each of the components (A) to (D). Also in can be used in combination of two or more. In the present invention, the content of the optional additive component is not particularly limited, but is usually about 0.01 to 0.5 part by weight in 100 parts by weight of the resin composition, and is appropriately selected according to the purpose.

(1) Lubricant A lubricant is effective for imparting and improving the releasability during molding of the resin composition and its molded body.
Examples of the lubricant include fatty acid amides such as oleic acid amide, stearic acid amide, erucic acid amide, and behenic acid amide, butyl stearate, and silicone oil.

(2) Antioxidant Antioxidant is effective in preventing deterioration of the quality of the resin composition and its molded product.
Examples of the antioxidant include a phenol-based, phosphorus-based and sulfur-based antioxidant.

(3) Others The resin composition of the present invention is a polyolefin resin other than the component (A), a thermoplastic resin such as a polyamide resin or a polyester resin, and a component other than the component (D), as long as the effects of the present invention are not significantly impaired. The elastomer (rubber component) can be contained.
As these optional components, various products are commercially available from many companies, and desired products can be obtained and used according to the purpose.

6). Method for Producing Polypropylene Resin Composition The resin composition of the present invention is optionally blended with components (A) to (D) as necessary, and added in the above-mentioned proportions by a conventionally known method. It can be manufactured through a kneading step of melt kneading.
Mixing is usually performed using a mixing device such as a tumbler, V blender, or ribbon blender, and melt kneading is usually performed by a single screw extruder, twin screw extruder, Banbury mixer, roll mixer, Brabender plastograph, kneader, stirring. Using a kneading machine such as a granulator (semi) melt kneading and granulating. When manufacturing by (semi) melt kneading and granulating, the blend of the above components may be kneaded at the same time, and each component may be divided and kneaded to improve performance. A method in which a part or all of the component (A) and a part of the component (C) are kneaded and then the remaining components are kneaded and granulated can be employed.

7). Manufacturing method and characteristics of molded body The molded body of the present invention is obtained by, for example, injection molding (including gas injection molding, two-color injection molding, core back injection molding, sandwich injection molding) of the resin composition manufactured by the above method. It can be obtained by molding by a known molding method such as injection compression molding (press injection), extrusion molding, sheet molding and hollow molding. Among these, it is preferable to obtain by injection molding or injection compression molding.

  Since the polypropylene resin composition for automobile interior and exterior parts and the molded body thereof according to the present invention have good fluidity, they are excellent in molding processability and can be thinned. In addition, the molded article of the present invention can be produced at low cost by using economically advantageous components and by an easy production method. In addition, the glass sagability is good even at high temperatures, so automotive interior and exterior parts, especially instrument panels, door trims, glove boxes, console boxes, armrests, grip knobs, various trims, ceiling parts, housings, etc. In various automotive parts including pillars, mud guards, bumpers, fenders, back doors, fan shrouds, housings and lamps for various lamps, etc., they are widely used for interior and exterior parts. it can.

EXAMPLES The present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.
The evaluation methods, analysis methods and materials used in the examples are as follows.

1. Evaluation method (1) Melt flow rate (MFR)
In accordance with JIS K7210, measurement was performed at a test temperature = 230 ° C. and a load = 2.16 kg.

(2) Fluidity Increase rate of MFR value before and after addition of organic peroxide using melt flow rate (MFR) value measured according to JIS K7210 at test temperature = 230 ° C. and load = 2.16 kg. (= MFR value after addition / MFR value before addition) was calculated, and the increase rate was evaluated based on a value converted per 1 mol of the component derived from the organic peroxide. The higher this value, the better the fluidity, and the resin composition of the present invention was evaluated according to the following criteria.
○: Increase rate per mol of organic peroxide is 5.0 × 10 ⁶ or more Δ: Increase rate per mol of organic peroxide is 2.0 × 10 ⁶ or more, less than 5.0 × 10 ⁶ ×: Organic excess Increase rate per 1 mol of oxide is less than 2.0 × 10 ⁶

(3) Glass sag properties Glass sag properties were evaluated under the following conditions.
Test method: ISO 6452
-Heating conditions: 90 ° C, 24 hours-Glass plate temperature: 40 ° C
In addition, the flat plate used for evaluation was created under the following conditions.
-Molding machine = EC20 type injection molding machine manufactured by Toshiba Machine.
-Mold = flat plate shape (60 x 80 x 2t (mm)).
Molding conditions: molding temperature 220 ° C., mold temperature 40 ° C., injection pressure 50 MPa, injection time 5 seconds, cooling time 20 seconds.
In the evaluation, haze was measured according to JIS K7136 and evaluated according to the following criteria.
○: Haze is 1% or less ×: Haze exceeds 1%

(4) Flexural rigidity Based on JIS K7171, it measured at test temperature = 23 degreeC. As the test piece, a flat test piece for evaluating physical properties prepared under the following conditions was used. In this invention, it is judged that it is favorable in it being 1700 Mpa or more.
-Molding machine = EC20 type injection molding machine manufactured by Toshiba Machine.
-Mold = 2 strip test pieces (10 x 80 x 4t (mm)) for physical property evaluation.
Molding conditions: molding temperature 220 ° C., mold temperature 40 ° C., injection pressure 50 MPa, injection time 5 seconds, cooling time 20 seconds.

(5) Impact strength (Charpy impact strength (notched))
Based on JIS K7111, it measured at the test temperature = 23 degreeC. As the test piece, the above-mentioned flat test piece for evaluating physical properties was used. In this invention, it is judged that it is favorable in it being 15 kJ / m ² or more.

2. Material (1) Component (A): Propylene polymer (A-1): Propylene homopolymer Novatec MA04A (manufactured by Nippon Polypro)
Ziegler catalyst, MFR (230 ° C., 2.16 kg load) 40 g / 10 min, melting peak temperature (Tm) = 166 ° C.
(A-2): Propylene-α-olefin block copolymer Wintech RFG4VA (manufactured by Nippon Polypro)
Metallocene catalyst, MFR (230 ° C., 2.16 kg load) 6 g / 10 min, ethylene content 7.5% by weight, melting peak temperature (Tm) = 128 ° C., Q value = 2.8

(2) Component (B): Organic peroxide (all values are catalog values)
(B-1): Dialkyl peroxide Perhexine 25B-40 (manufactured by NOF Corporation)
Theoretical active oxygen amount 11.2%, purity 40% (diluent: silica, etc.), white powder (B-2): dialkyl peroxide perhexa 25B-40 (manufactured by NOF Corporation)
Theoretical active oxygen amount 11.0%, purity 40% (diluent: silica, etc.), white powder (B-3): dialkyl peroxide perbutyl P-40 (manufactured by NOF Corporation)
Theoretical active oxygen amount 9.5%, purity 40% (diluent: inert filler), white powder (B-4): peroxyketal perhexa V-40 (manufactured by NOF Corporation)
Theoretical active oxygen content 9.6%, purity 40% (diluent: silica, etc.), white powder

(3) Component (C): Inorganic filler (C-1): Talc micron white 5000SMA (manufactured by Hayashi Kasei)
Average particle size 5μm
(C-2): Glass fiber T480H (Nippon Electric Glass Co., Ltd.)
Chopped strand, fiber diameter 10μm, length 4mm

(4) Component (D): Ethylene-α-olefin copolymer (D-1): Ethylene-octene copolymer EG8200 (manufactured by Dow Chemical Company)
MFR (230 ° C., 2.16 kg load) 10 g / 10 min, density 0.870 g / cm ³ (catalog value)

3. Examples and Comparative Examples [Examples 1 to 18 and Comparative Examples 1 to 23]
(1) Manufacture of resin composition The components (A) to (D) are blended in the proportions shown in Tables 1 to 6 together with the following additives, and kneaded and granulated under the following conditions. Pellets were produced.
Under the present circumstances, 0.1 weight part of IRGANOX1010 made from BASF and 0.1 weight part of IRGAFOS168 made from BASF were mix | blended per 100 weight part of the whole composition which consists of said component (A)-(D), respectively.
Kneading apparatus: “KZW-15-MG” type twin screw extruder manufactured by Technobel.
Kneading conditions: temperature = 200 ° C., screw rotation speed = 400 rpm, discharge amount = 5 kg / Hr
Of the component (C), the glass fiber (C-2) was side-fed from the middle stage of the extruder.

(2) Evaluation Using the obtained polypropylene resin composition pellets, various evaluations were performed according to the evaluation method. The results are shown in Tables 1-6.
1) About Table 1 (Examples 1-4) About the polypropylene-type resin composition which satisfy | fills prescription | regulation of this invention, fluidity | liquidity and haze were evaluated. In any of the examples, fluidity and haze were good.

2) About Table 2 (Examples 5 to 12) Since good results were obtained in Examples 1 to 4, the amount of component (B): organic peroxide used was reduced and evaluated. Since the component (B) is reduced, the organic peroxide residue is reduced, and the haze is naturally improved. However, since there is a concern about the deterioration of the fluidity, only the fluidity is evaluated here. As a result, the fluidity was good in any of the examples of the polypropylene resin composition satisfying the provisions of the present invention.

3) About Table 3 (Examples 13 to 16) Since favorable results were obtained in Examples 1 to 12, evaluation was further performed using Component (C): an inorganic filler. Since component (C) is used, good rigidity can be expected. As a result, fluidity, haze and rigidity were good in any of the examples of the polypropylene resin composition satisfying the provisions of the present invention.

4) About Table 4 (Examples 17-18) Since favorable results were obtained in Examples 1-16, in addition to component (C): inorganic filler, component (D): ethylene-α-olefin copolymer Evaluation was performed using coalescence. Since component (D) is used in addition to component (C), it can be expected that rigidity and impact resistance are good. As a result, fluidity, haze, rigidity and impact resistance were good in any of the examples of the polypropylene resin composition satisfying the provisions of the present invention.

5) About Table 5 and Table 6 (Comparative Examples 1 to 23) In Comparative Examples that do not satisfy the specific matters of the present invention, Comparative Examples 1 to 23 (Comparative Examples 1, 8, 15, 18, and 21 are organic peroxides). The resin composition having the composition shown in the standard (reference example) which is not added) and the molded product thereof have poor performance balance and are inferior to those of Examples 1 to 18.
For example, Comparative Examples 2 to 4, 9 to 11, 16, 19, and 22 are inferior in glass sag properties, and these are considered to be due to organic peroxide residues. In Comparative Examples 5-7, 9, 12-14, 16-17, 19-20, 23, the fluidity improvement by the addition of the organic peroxide is insufficient, and these have an active oxygen content of the organic peroxide. It is thought that this is because of low.

  Since the polypropylene resin composition for automobile interior and exterior parts and the molded body thereof according to the present invention have good fluidity, they are excellent in molding processability and can be thinned. In addition, the glass sagability is good even at high temperatures, so automotive interior and exterior parts, especially instrument panels, door trims, glove boxes, console boxes, armrests, grip knobs, various trims, ceiling parts, housings, etc. It can be used in a wide range of interior and exterior parts in various automotive parts, including pillars, mudguards, bumpers, fenders, back doors, fan shrouds, housings and lamps for various lamps, etc. It is very useful in industry.

Claims (5)

100 parts by weight of component (A) satisfying the following conditions (A-1) to (A-2);
For 100 parts by weight of component (A),
A polypropylene resin composition for automobile parts, comprising 0.01 to 1 part by weight of component (B) that satisfies the following condition (B-1).
Condition (A-1)
Component (A) is at least one propylene polymer selected from the group consisting of a propylene homopolymer, a propylene-α-olefin random copolymer, and a propylene-α-olefin block copolymer.
Condition (A-2)
Component (A) has a melt flow rate (230 ° C., 2.16 kg load) of 0.1 to 200 g / 10 min.
Condition (B-1)
Component (B) is an organic peroxide having a theoretical active oxygen content of 10% or more.   The polypropylene resin composition for automobile parts according to claim 1, wherein the component (B) is a dialkyl peroxide. The polypropylene resin composition for automobile parts further contains 5 to 100 parts by weight of component (C) satisfying the following condition (C-1) with respect to 100 parts by weight of component (A): The polypropylene resin composition for automobile parts as described.
Condition (C-1)
Component (C) is at least one inorganic filler selected from the group consisting of talc, mica, calcium carbonate, whiskers, glass fibers, and carbon fibers. The polypropylene resin composition for automobile parts further contains 5 to 100 parts by weight of component (D) satisfying the following conditions (D-1) to (D-3) with respect to 100 parts by weight of component (A). The polypropylene resin composition for automobile parts according to any one of claims 1 to 3.
Condition (D-1)
Component (D) is an ethylene-α-olefin copolymer obtained by copolymerizing ethylene and an α-olefin having 3 to 8 carbon atoms.
Condition (D-2)
The component (D) has a density of 0.86 to 0.92 g / cm ³ .
Condition (D-3)
The melt flow rate (230 degreeC, 2.16kg load) of a component (D) is 0.5-100 g / 10min.   The molded object formed by shape | molding the polypropylene resin composition for motor vehicle parts of any one of Claims 1 thru | or 4.