JP2005139421A - Resin composition used for vehicle interior by using crushed material of vehicle bumper mingled with insoluble substance as raw material and molded article of the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a re-color-toned resin composition having excellent appearance and capable of being utilized for an interior of a vehicle by using a crushed material of automobile bumpers mingled with insoluble impurities such as resin-cured materials such as coating film, etc., sand-like inorganic materials, pieces of plants, pieces of metals, etc., and without removing the insoluble impurities mingled with the bumper such as the coated film, etc. <P>SOLUTION: This resin composition obtained by mixing (A) a crushed material of vehicle bumpers mingled with 0.1-10 wt.% insoluble materials, (B) a crystalline polypropylene, (C) an elastomer, (D) an inorganic filler and (E) a light-shading pigment each in a specific ratio and heating for melting is characterized with that the sizes of the insoluble materials mingled with the resin composition is those of passing 20 mesh screen. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention is obtained from a resin composition for vehicle interior that is excellent in rigidity, excellent in impact properties, and excellent in fluidity obtained from a pulverized product of a bumper for vehicles having a resin cured product or an insoluble material such as metal, and the composition. It relates to a molded product.

  In recent years, in order to reduce the burden on the environment, it has been required to reuse synthetic resin products represented by automobile parts and home appliance parts for synthetic resin materials. We are considering effective reuse. In general, reuse of synthetic resin products to synthetic resin materials is because most of the synthetic resin products are formed from thermoplastic resins, so the synthetic resin products are pulverized into pulverized products, and the pulverized products are heated and melted. Later, it is used as a granular material.

  For example, Patent Document 1 and Patent Document 2 include a high-density polyethylene resin, a high-density polyethylene resin, and a paint waste plastic part made of a polypropylene resin modified with a proportion of ethylene-propylene copolymer rubber of 10 to 40% by weight. A method for reusing a coated resin characterized by blending a low density polyethylene resin is disclosed.

  Patent Document 3 discloses (A) an aromatic polycarbonate resin recovered from an unnecessary optical information recording medium whose substrate is an aromatic polycarbonate resin, and the recovered aromatic measured by the method specified in the text. A total of 100 weights of recovered aromatic polycarbonate resin 90 to 30% by weight (component a) and (B) 10 to 70% by weight of inorganic pigment (component b) in which the foreign matter in the polycarbonate resin is 0.01 to 0.1% by weight. %, A colored master resin composition is disclosed.

Japanese Patent Application Laid-Open No. 2000-281846 Japanese Patent Application Laid-Open No. 2000-281846 JP 2000-327896 A

In recent years, in order to reduce the burden on the environment, it is required to reuse automobile bumpers, and many companies are considering effective reuse.
Since the bumper for automobiles has a coating film of a cured resin on the resin surface, it is necessary to remove the coating film for reuse.
Moreover, since the bumper for automobiles is colored black, the use in reuse is limited to a black resin molded product or a gray resin molded product.
Furthermore, when collecting bumpers for automobiles, insoluble impurities such as plant pieces and metal pieces may be attached or mixed on the resin surface, and it was necessary to remove these impurities for reuse.

  The present invention uses a pulverized product of an automobile bumper in which insoluble impurities such as a resin cured material such as a coating, sandy inorganic material, plant pieces, and metal pieces are mixed, and insoluble impurities such as a coating film mixed in the bumper. An object of the present invention is to provide a resin composition that is excellent in appearance and can be used for a re-colored interior of a vehicle without removing the above.

The inventor of the present invention mixes crystalline polypropylene, thermoplastic elastomer, inorganic filler, and light-shielding pigment with a pulverized product of an automobile bumper to be recycled, which contains a small amount of insoluble impurities such as a cured resin. The resin composition obtained by heating and melting was found to be a resin molded article having excellent rigidity, excellent impact strength, excellent fluidity, and excellent appearance.
In addition, they found that chromatic colored recycled resin with a different color tone for automobile bumpers could be obtained.

The present invention relates to an automobile bumper pulverized product (A), crystalline polypropylene (B), elastomer (C), inorganic filler (D), and light shielding pigment containing 0.1 to 10% by weight of insoluble matter. (E) is a resin composition obtained by mixing and heating and melting at the following ratio, and the size of the insoluble matter mixed in the resin composition passes through a 20 mesh screen. To provide a resin composition for automobile interior.
(A) Car bumper pulverized product: 10 to 75% by weight,
(B) Crystalline polypropylene: 10 to 75% by weight,
(C) Elastomer: 0 to 10% by weight,
(D) Inorganic filler: 0 to 20% by weight,
(E) Light shielding pigment: 0.1 to 10% by weight.
However, the total of [A + B + C + D + E] is 100% by weight.

Preferred embodiments of the present invention are described next. A plurality of the following preferred embodiments of the present invention can be combined.
1: The light shielding component is a chromatic color pigment alone, a combination of a chromatic color pigment and a black pigment, a combination of a chromatic color pigment and a white pigment, or a combination of a chromatic color pigment, a black pigment and a white pigment. The recycled resin is chromatic.
2: The resin composition for vehicle interior according to claim 1, wherein the molded resin for vehicle interior has a flexural modulus of 1700 MPa or more, an Izod of 40 J / m or more, and an MFR of 15 g / 10 min or more.
3: It is preferable that the elastomer (C) mixed in the resin composition is 0 to 10% by weight (excluding 0% by weight).
4: It is preferable that the inorganic filler (D) mixed in the resin composition is 0 to 20% by weight (excluding 0% by weight).
5: (C) Elastomer mixed in resin composition is 0 to 10% by weight (excluding 0% by weight), and (D) inorganic filler is 0 to 20% by weight (provided that 0% by weight is not added). Except).

  A molded article such as injection molding can be obtained from the resin composition of the present invention.

The resin composition for vehicle interior of the present invention is a coating mixed with a bumper using a pulverized product of an automobile bumper mixed with insoluble impurities such as a cured resin such as a coating, a sandy inorganic substance, a plant piece, and a metal piece. A resin having an excellent appearance can be obtained without removing insoluble impurities such as a film.
The resin composition for vehicle interior of the present invention can produce a resin molded product having excellent rigidity, excellent impact strength, and excellent fluidity.
The resin composition for vehicle interior according to the present invention can provide a resin that is recolored in gray, blue, green, purple, red, brown, ivory, etc., different from the color of the bumper.

  The resin composition for vehicle interior of the present invention comprises a pulverized product (A), crystalline polypropylene (B), elastomer (C), inorganic filler (D) for a vehicle bumper mixed with 0.1 to 10% by weight of insoluble matter. ) And the light shielding pigment (E) are mixed at a specific ratio and heated and melted.

In the present invention,
Car bumper pulverized product (A), crystalline polypropylene (B), elastomer (C), inorganic filler (D), and light shielding pigment (E) containing 0.1 to 10% by weight of insoluble matter Is a resin composition obtained by mixing and heating and melting at the following ratio, and the size of the insoluble matter mixed in the resin composition passes through a 20 mesh screen. To provide a resin composition.
(A) Car bumper pulverized product: 10 to 75% by weight, preferably 20 to 70% by weight, more preferably 25 to 65% by weight, particularly preferably 30 to 60% by weight. If the impact strength deteriorates and the upper limit is exceeded, the rigidity is low and the mechanical properties are insufficient as an interior material for vehicles, which is not preferable.
(B) Crystalline polypropylene: 10 to 75% by weight, preferably 20 to 70% by weight, more preferably 25 to 65% by weight, particularly preferably 30 to 60% by weight. When the upper limit is exceeded, the impact strength deteriorates, and the mechanical properties are insufficient as a vehicle interior material, which is not preferable.
(C) Elastomer: 0 to 10% by weight, preferably 0 to 10% by weight (excluding 0% by weight), more preferably 1 to 10% by weight. It is not preferable because the mechanical properties are insufficient as an interior material.
(D) Inorganic filler: 0 to 20% by weight, preferably 0 to 20% by weight (excluding 0% by weight), more preferably 1 to 18% by weight, and particularly preferably 1 to 14% by weight. If it exceeds, the impact strength is deteriorated, and it is estimated that the mechanical properties are insufficient as an interior material for a vehicle.
(E) Light-shielding pigment: 0.1 to 10% by weight, preferably 0.5 to 7% by weight, more preferably 1 to 6% by weight, and particularly preferably 1.2 to 5% by weight. If it is less than the upper limit, it is difficult to obtain a desired color product, insoluble matter such as a coating film appears on the surface of the molded product, and it is difficult to obtain a molded product with excellent appearance. It deteriorates and is not preferable because it is presumed that the mechanical properties are insufficient as a vehicle interior material.
However, the total of [A + B + C + D + E] is 100% by weight.

  In the pulverized product (A) of the vehicle bumper in which insoluble matter is mixed, the amount of insoluble matter mingled is 0.1 to 10% by weight with respect to 100% by weight of the pulverized product of the vehicle bumper, preferably 0.8%. It is 1 to 5% by weight, more preferably 0.1 to 3% by weight, and particularly preferably 0.1 to 2% by weight.

  Examples of vehicle bumpers containing 0.1 to 10% by weight of insoluble materials include used bumpers collected from automobiles, recovered bumpers due to process loss that can no longer be used due to problems in the bumper production process, etc. Can do. The used bumper and the recovered bumper are not particularly limited, but preferably include a crystalline propylene resin, an elastomer, an inorganic filler, and a pigment. For example, a resin component of 40 to 90% by weight of a crystalline propylene resin and 10 to 60% by weight of an elastomer, 0 to 30% by weight of an inorganic filler, and 0 to 20% by weight of other resin components excluding the crystalline propylene resin and the elastomer. Including recovery bamber can be used. As the recovery bumper, those containing pigments such as carbon black and titanium dioxide can be targeted for regeneration, and in particular, those containing carbon black and titanium dioxide can be targeted for regeneration. The recovered bumper is 2 parts by weight or less of carbon black, more preferably 1.5 parts by weight or less, more preferably 1 part by weight or less, and particularly preferably 0.8 parts by weight with respect to 100 parts by weight of the plastic component (resin component + elastomer component). The thing contained in the quantity of 6 weight part or less can be used. The recovery bumper is 1.5 parts by weight or less, more preferably 1 part by weight or less, more preferably 0.5 parts by weight of the pigment excluding carbon black with respect to 100 parts by weight of the plastic component (resin component + elastomer component). Hereinafter, it is particularly preferable to use a material containing 0.3 parts by weight or less. The recovery bumper is 50 parts by weight or less of filler such as talc, more preferably 40 parts by weight or less, more preferably 30 parts by weight or less, and particularly preferably 20 parts by weight with respect to 100 parts by weight of the plastic component (resin component + elastomer component). The thing containing below a part can be used. The recovery bumper has a melt flow rate (MFR) measured by ASTM D1238 (temperature 230 ° C., specific gravity 2.16 kg), preferably 1 to 100 g / 10 min, more preferably 3 to 70 g / 10 min, particularly preferably What uses a thermoplastic resin as a resin material for 5-50 g / 10min can be used.

The crushed material of a bumper for cars that contains 0.1 to 10% by weight of insoluble matter
(1) Cured resin molding film (for example, acrylic resin, urethane resin, unsaturated polyester resin, alkyd melamine resin, acrylic melamine resin, etc.) attached to the surface of the bumper for vehicles. ), And a bumper pulverized product including a cured resin molded product obtained by curing a curable resin using a curing catalyst.
(2) A pulverized product of a bumper for a vehicle in which insoluble materials such as sandy inorganic substances having a long side of 1.5 mm or less, plant pieces, metal pieces, resin decomposition products, and metal oxides are mixed.

  The pulverized product of a vehicle bumper is a pulverized product that has been pulverized to have a diameter of usually 30 mm or less, preferably 1 to 30 mm, more preferably 1 to 25 mm, more preferably 1 to 20 mm, and particularly preferably 1 to 12 mm. . Further, a pulverized product of a vehicle bumper is melted by using a heating extruder or the like and pelletized, and the pulverized product of a vehicle bumper can also be used.

  The pulverized product of the car bumper is black or black so that the melt molded product has L * of 20 to 37, a * of -1.00 to 0.40, and b * of -1.50 to 0.50. It is preferably a gray pulverized product, and further, pulverized so that L * of the melt-molded product is 23 to 28, a * is -0.70 to 0.10, and b * is -1.20 to 0.20. Things are preferred.

  The insoluble matter such as a coating film contained in the pulverized product of the bumper for automobiles is 70% by weight or more of the insoluble matter, more preferably 80% by weight or more, more preferably 90% by weight or more, and particularly preferably 95% by weight or more. Production of a regenerated resin composition is such that the size of the long side of an insoluble material such as a coating film is 7 mm or less, preferably 5 mm or less, more preferably 3 mm or less, more preferably 2 mm or less, and particularly preferably 1.3 mm or less. It is preferable because a molded product having excellent properties and appearance can be obtained.

  The insoluble matter such as a coating film contained in the resin composition or molded product obtained by the present invention is 70% by weight or more of the insoluble matter, more preferably 80% by weight or more, more preferably 90% by weight or more, particularly preferably 95%. % By weight or more is an insoluble material such as a coating film, and the size of the long side of the insoluble material such as a coating film is 3 mm or less, more preferably 2 mm or less, more preferably 1.3 mm or less, and particularly preferably 1.0 mm or less. It is preferable that a molded product having excellent mechanical properties such as impact strength and excellent appearance can be obtained.

  As the light blocking pigment, a black pigment, a white pigment, and a chromatic pigment can be used. Two or more of these pigments can be blended. In particular, it is preferable to blend at least one pigment selected from carbon black and titanium dioxide as a light-impervious pigment in order to obtain a chromatic regenerated resin having a changed color tone.

  Examples of white pigments include titanium dioxide (titanium oxide), white lead, and zinc oxide. Particularly preferred is titanium dioxide.

  As titanium dioxide, those conventionally used for pigments can be used without limitation, and for example, those produced by the chlorine method or sulfuric acid method can be used. The thing manufactured by the chlorine method is preferable. The particle shape is not particularly limited, but tetragonal, rutile, and anatase types can be used, and tetragonal and rutile types are particularly preferable. The average particle diameter is not particularly limited, but is preferably 0.01 to 0.5 μm, more preferably 0.05 to 0.5 μm, more preferably 0.1 to 0.4 μm, and particularly preferably 0.2 to 0.00. 3 μm is preferable because it is excellent in dispersibility, handleability and workability. The DOP oil absorption amount of titanium dioxide is not particularly limited, but is preferably 5 to 40 (cc / 100 g), more preferably 8 to 30 (cc / 100 g), more preferably 10 to 20 (cc / 100 g), particularly preferably. Is 12 to 18 (cc / 100 g).

  Known pigments can be used without limitation, for example, inorganic pigments such as metal oxides, hydroxides, sulfides, chromates, carbonates, sulfates and silicates; azo series, diphenylmethane series And organic pigments such as triphenylmethane, phthalocyanine, nitro, nitroso, anthraquinone, quinacridone red, benzidine, and condensed polycyclic. Further, it may be colored fibers or glossy metal particles. There is no restriction | limiting in particular about the hue of a chromatic color pigment, Any things, such as yellow, blue, red, and green, can be used. Two or more kinds of these pigments can be used in combination.

  Chromatic pigments include petal, ultramarine, cobalt blue, titanium yellow, red lead, lead yellow, bitumen, zinc sulfide, barium yellow, cobalt blue, cobalt green and other inorganic pigments; quinacridone red, polyazo yellow, anthraquinone Organic pigments such as red, anthraquinone yellow, polyazo red, azo lake yellow, berylene, phthalocyanine blue, phthalocyanine green, isoindolinone yellow, watching red, permanent red, para red, toluidine maroon, benzidine yellow, first sky blue, brilliant carmine 6B , Colored fibers, glossy metal particles, and the like, and two or more of these pigments can be used in combination.

  The average particle diameter of titanium yellow is not particularly limited, but is preferably 0.1 to 1.5 μm, more preferably 0.5 to 1.3 μm, more preferably 0.7 to 1.1 μm, and particularly 0.8 to 1 μm. Is preferable because it is excellent in dispersibility, handleability, and workability. The DOP oil absorption amount of titanium yellow is not particularly limited, but is preferably 15 to 40 (cc / 100 g), more preferably 20 to 35 (cc / 100 g), and particularly preferably 20 to 30 (cc / 100 g). It is. The pH of titanium yellow is not particularly limited, but is preferably in the range of 6 to 10, particularly preferably 7 to 9.

  As the ultramarine, those conventionally used for pigments can be used without limitation. The average particle diameter of ultramarine is not particularly limited, but is preferably 0.1 to 5 μm, more preferably 0.5 to 4 μm, more preferably 0.8 to 3.5 μm, and particularly preferably 1 to 3 μm. . These are preferable because they are excellent in dispersibility, handleability and workability. The DOP oil absorption amount of ultramarine is not particularly limited, but is preferably 20 to 50 (cc / 100 g), more preferably 25 to 40 (cc / 100 g), and particularly preferably 30 to 35 (cc / 100 g). Although ultramarine PH is not particularly limited, it is preferably in the range of 5 to 11, more preferably 5.5 to 11, and particularly preferably 7 to 11.

  As the phthalocyanine blue, those conventionally used for pigments can be used without limitation, and those produced by, for example, the Waller method or the phthalonitrile method can be used. The particle shape of phthalocyanine blue is not particularly limited, but α type, β type, and the like can be used. The average particle size of phthalocyanine blue is not particularly limited, but is preferably 0.01 to 2 μm, more preferably 0.05 to 1.5 μm, more preferably 0.1 to 0.4 μm, and particularly preferably 0.1 to 1 μm. Range.

  As the phthalocyanine green, those conventionally used for pigments can be used without limitation, and for example, those produced by the Waller method or the phthaloetril method can be used. The particle shape of phthalocyanene green is not particularly limited, but α type, β type, and the like can be used. The average particle size of phthalocyanine green is not particularly limited, but is preferably 0.01 to 2 μm, more preferably 0.05 to 1.5 μm, more preferably 0.1 to 0.4 μm, and particularly preferably 0.1 to 0.1 μm. The range is 1 μm. The pH of phthalocyanine green is not particularly limited, but is preferably 4 to 9, and more preferably 4 to 8.

  As the petal, those conventionally used for pigments can be used without limitation. The particle shape of the petal is not particularly limited, but an equiaxed crystal system or the like can be used. The average particle diameter of the petal is not particularly limited, but is preferably 0.01 to 1 μm, more preferably 0.05 to 0.5 μm, more preferably 0.08 to 0.4 μm, and particularly preferably 0.1 to 0.1 μm. The range is 0.3 μm. The amount of DOP oil absorption of the petal is not particularly limited, but is preferably 10 to 50 (cc / 100 g), more preferably 12 to 40 (cc / 100 g), and particularly preferably 15 to 30 (cc / 100 g). is there. The pH of the valve is not particularly limited but is preferably in the range of 4-8, more preferably 5-7.

As quinacridone red, those conventionally used for pigments can be used without limitation. The particle shape of quinacridone red is not particularly limited, and α-type, β-type, γ-type and the like can be used. The average particle size of quinacridone red is not particularly limited, but is preferably 0.01 to 2 μm, more preferably 0.05 to 1.5 μm, and particularly preferably 0.1 to 1 μm.
As anthraquinone red, those conventionally used for pigments can be used without limitation. The average particle size of anthraquinone red is not particularly limited, but is preferably 0.01 to 2 μm, more preferably 0.05 to 1.5 μm, and particularly preferably 0.1 to 1 μm. Although not limited to the pH of anthraquinone red, it is preferably in the range of 4-9.

  As the black pigment, carbon black or iron black can be used. Two or more black pigments can be used in combination.

  As carbon black, those conventionally used for pigments can be used without limitation, such as carbon black, acetylene black, lamp black, channel black, ketjen black, etc. produced by the furnace method or channel method. Can be used. Carbon black can be oxidized. As carbon black, it is particularly preferable to use furnace black produced by the furnace method because it has excellent appearance uniformity, excellent dispersibility, and the effect of improving the blackness and gloss of the resulting shaped product is large. . The average particle size of carbon black is not particularly limited, but is preferably 0.001 to 0.3 μm, more preferably 0.005 to 0.2 μm, more preferably 0.01 to 0.1 μm, and particularly preferably 0.00. Those having a thickness of 01 to 0.03 μm are preferable because they are excellent in dispersibility, handleability, and workability, and exhibit high effects in improving blackness and gloss.

  As the iron black, black iron oxide obtained by a firing method can be used. The particle shape of the iron black is not particularly limited, but a polyhedral shape such as an octahedron, a spherical shape, or the like can be used, and an octahedron is particularly preferable. The average particle size of iron black is not particularly limited, but is preferably 0.05 to 0.4 μm, more preferably 0.15 to 0.35 μm, and particularly preferably 0.2 to 0.35 μm. The DOP oil absorption amount of iron black is not particularly limited, but is preferably 10 to 80 (cc / 100 g), more preferably 15 to 50 (cc / 100 g), more preferably 20 to 40 (cc / 100 g), and particularly preferably. Is in the range of 25-35 (cc / 100 g). The pH of the iron black is not limited, but is preferably 9 to 11, and particularly preferably 9 to 10.

  The white pigment, black pigment, and / or chromatic color pigment may be added directly as they are, or the pigment may be added as a master batch. A masterbatch technique using a pigment and a resin component is already known.

As the inorganic filler, inorganic fillers excluding pigments can be used. Inorganic fillers include talc, clay, mica, silica, diatom, moss heidi, tismo, wollastonite, montmorillonite, bentonite, dolomite, dosonite, silicates, carbon fiber, glass (including glass fiber), barium ferrite , Beryllium oxide, aluminum hydroxide, magnesium hydroxide, basic magnesium carbonate, calcium carbonate, magnesium carbonate, magnesium sulfate, calcium sulfate, barium sulfate, ammonium sulfate, calcium sulfite, calcium oxalate, molybdenum sulfide, zinc borate, metaboric acid Barium, calcium borate, sodium borate, etc., or zinc, copper, iron, lead, aluminum, nickel, chromium, titanium, manganese, tin, platinum, tungsten, gold, magnesium, cobalt, Metals such as trontium and their metal oxides, alloys such as stainless steel, solder and brass, powders of metal ceramics such as silicon carbide, silicon nitride, zirconia, aluminum nitride and titanium carbide, fibrous whiskers and fibers Can be used.
The filler is preferably an inorganic filler, and particularly preferably talc. Moreover, a filler can be used in combination of 2 or more types.

As the crystalline polypropylene, the melt flow rate (MFR) measured by ASTM D1238 (temperature 230 ° C., load 2.16 kg) is preferably 0.1 to 300 (g / 10 min), more preferably 1 to 200 ( g / 10 minutes), more preferably 3 to 100 (g / 10 minutes), and particularly preferably 5 to 80 (g / 10 minutes).
As the propylene-based resin of the olefin-based resin, in the case of a polypropylene alone and a block polymer of the propylene-based resin, the propendate ratio of the propylene homo part is preferably 95% or more, and in the case of a random polymer of the propylene-based resin, the melting point is 130 ° C. The above is preferable.

As the elastomer, a thermoplastic low crystalline elastomer having no clear yield point or a thermoplastic amorphous elastomer having no clear melting point and yield point, and an elastomer or rubber having rubber elasticity at room temperature is used. I can do it.
As the elastomer, thermoplastic elastomers such as a styrene elastomer, an olefin elastomer, a polyester elastomer, a polyamide elastomer, and a polyurethane elastomer can be used.
One type of elastomer may be used, or two or more types may be used in combination.

  Styrene elastomers include butadiene-styrene copolymers (including all random copolymers, block copolymers, graft copolymers, etc.) and hydrogenated products thereof, styrene-butadiene-styrene copolymers (SBS, etc.) ), Hydrogenated styrene-butadiene-styrene copolymer (such as SEBS), hydrogenated styrene-butadiene copolymer (such as HSBR), isoprene-styrene copolymer (random copolymer, block copolymer, graft copolymer) And all of its hydrogenated products, hydrogenated styrene-isoprene copolymers (such as SEPS), hydrogenated styrene-vinylisoprene copolymers (such as V-SEPS), and styrene-isoprene-styrene copolymers. (Such as SIS), hydrogenated styrene-isoprene-styrene copolymer (such as SEPS), hydrogenated styrene-butane Ene - olefin crystal block copolymer (such as SEBC) and the like can be used.

As the polyolefin elastomer, amorphous or low crystalline polyolefin-α-olefin copolymer, a mixture of polyolefin and olefin rubber, etc. can be used. Natural rubber, isoprene rubber, butadiene rubber, butyl rubber, ethylene・ Ethylene and carbon such as propylene elastomer, ethylene / propylene / diene terpolymer elastomer, ethylene / 1-butene elastomer (EBM, EBS, etc.), ethylene / hexene elastomer, ethylene / octene elastomer, propylene / 1-butene elastomer Examples include polyolefin elastomers such as copolymer elastomers with α-olefins having 3 to 12 and copolymer elastomers with propylene and α-olefins having 2 to 12 carbon atoms (excluding 3 carbon atoms). .
Furthermore, examples of the polyolefin elastomer include hydrogenated acrylonitrile rubber, acrylonitrile butadiene rubber, epichlorohydrin rubber, acrylic rubber, and chloroprene rubber.
In particular, as an elastomer, a copolymer elastomer of ethylene and an α-olefin having 3 to 12 carbon atoms, a copolymer elastomer of propylene and an α-olefin having 2 to 12 carbon atoms (excluding 3 carbon atoms), etc. The polyolefin-based elastomer can be preferably used.

As the polyester elastomer, an elastomer made of a polyester-polyether copolymer, a polyester-polyester copolymer, or the like can be used.
As the polyamide-based elastomer, an elastomer made of a polyamide-polyester copolymer, a polyamide-polyether copolymer, or the like can be used. Two or more of the above elastomers may be mixed and used.

  When reclaiming the waste plastic powder of the present invention, additives and dispersants such as lubricants, antistatic agents, surfactants, nucleating agents, ultraviolet absorbers, antioxidants, flame retardants, etc. Etc. can be added.

  Examples of the dispersant include higher fatty acid, higher fatty acid amide, metal soap, glycerin ester, hydrotalcite, polyethylene wax, and polypropylene wax.

  Examples of additives include phenolic, phosphorus, sulfur and other antioxidants, UV absorbers such as benzophenone and benzotriazole, light stabilizers such as HALS, and phosphorus and halogen flame retardants. I can do it.

In the regeneration of the waste plastic pulverized product of the present invention, as described above, a thermoplastic resin and / or an elastomer can be added and blended as necessary. The thermoplastic resin or elastomer to be added and blended is desirably the same resin as the resin material of the synthetic resin product or an equivalent resin.
Therefore, examples of thermoplastic resin materials that can be used to recycle pulverized synthetic resin products include olefin resins (eg, high density polyethylene, low density polyethylene, crystalline polypropylene), polycarbonate resins, polyurethane resins, Styrene resins, ABS resins (acrylonitrile-butadiene-styrene resins), polyester resins such as polybutylene terephthalate and polyethylene terephthalate, polyphenyl ether resins such as modified polyphenylene ether and polyphenylene sulfide, and polymethyl methacrylate Polyacrylic acid resins, 6-nylon, 66-nylon, 12-nylon, 6 · 12-nylon and other polyamide resins, polysulfone and the like can be mentioned.

  In the case of producing a recycled resin granule according to the present invention, first, a chromatic pigment, a white pigment, or a black pigment having a shielding property that is supposed to be an appropriate amount for a pulverized product of a car bumper having a cured resin material. Alternatively, any combination of these shielding pigments, and if necessary, adding a thermoplastic resin or elastomer, melt-kneading, and then producing a test piece directly or through recycled resin granules, The color tone and appearance (especially the conspicuousness of resin-cured resin debris) can be measured with a tester or visually determined, and various physical properties can be measured as necessary. And the suitability of the amount added. Based on the judgment, if necessary, a method of performing the same operation by changing the addition amount of the additive and the type of the additive is used to obtain a recycled resin having a desired color tone, appearance, and physical properties. Recycled resin granules that can be used for molding can be obtained.

  When producing chromatic color regenerated resin granules according to the present invention, first, chromatic color pigments, white pigments and chromatic color pigments, and black pigments that are supposed to be suitable for pulverized synthetic resin products having raw material coloring And chromatic pigment, or white pigment, black pigment and chromatic pigment, and if necessary, add thermoplastic resin or elastomer, melt and knead, then test specimen directly or through recycled resin granules The color tone and appearance (especially the conspicuousness of the resin cured product fragments) are measured by a testing machine or visually determined, and various physical properties are measured as necessary. Judge the suitability of the type and amount of ingredients. Based on the judgment, if necessary, a method of performing the same operation by changing the addition amount of the additive and the type of the additive is used to obtain a chromatic color reproduction resin having a desired color tone and physical properties. A chromatic regenerated resin granular material that can be used for molding can be obtained.

  In the present invention, there are no particular limitations on the mixing method, mixing apparatus, and mixing equipment of the waste plastic pulverized product and each component. As the kneading apparatus, known single-screw extruders (kneading machines), twin-screw extruders are used. (Kneading machine), a tandem kneading apparatus in which a twin screw extruder and a single screw extruder (kneading machine) are connected in series, a calendar, a Banbury mixer, a kneading roll, a brabender, a plastograph, a kneader, or the like can be used.

  The chromatic color regenerated resin granular material obtained in the present invention is obtained by using a known molding or molding method such as extrusion molding, sheet molding, injection molding, injection compression molding, gas injection injection molding, probe molding, vacuum molding, door trim, It can be reused as molded parts for car interior parts such as instrument panels, pillars, various trims, and console boxes. In the method for reusing waste plastic according to the present invention, the molded product obtained can be a molded product having a glossy surface, a molded product having irregularities and patterns such as a drawing, a molded article having smooth irregularities and patterns, and the like. .

The resin composition for car interior according to the present invention has the following characteristics:
The flexural modulus is preferably 1700 MPa or more, more preferably 1800 MPa or more, more preferably 1900 MPa or more, particularly preferably 2000 MPa or more,
Izod is 40 J / m or more, more preferably 45 J / m or more, particularly preferably 55 J / m or more,
The MFR is 15 g / 10 min or more, more preferably 16 g / 10 min or more, more preferably 18 g / 10 min or more, and particularly preferably 20 g / 10 min or more.

  EXAMPLES Hereinafter, although an Example and a comparative example are given and this invention is demonstrated, this invention is not limited to these Examples.

[Evaluation methods]
(1) Evaluation of mechanical properties Recycled pellets produced with a twin-screw kneader were used with an injection molding machine with a clamping force of 130 tons, mold: ASTM compliant, molding temperature: C1-C2-C3-C4 = 180-190 -200-210 ° C, injection pressure: P1-P2-P3-P4 = 108-98-88-78 MPa, injection speed: V1-V2-V3-V4 = 30-30-20-20%, screw back pressure: free , Screw rotation speed: 60%, mold temperature: 40 ° C., cycle: injection 10 seconds, cooling 20 seconds, 10 shots were continuously molded, and 6-10 shot moldings (test piece A) were collected. .
1) Flexural modulus (MPa): Conforms to ASTM D-790.
2) Izod (J / m): 23 ° C., conforming to ASTM D-256.

(2) MFR measurement: ASTM D1238 was performed at 230 ° C.

(3) Appearance evaluation method of narrowed surface of test piece A:
Recycled pellets produced with a twin-screw kneader were used with an injection molding machine with a clamping force of 130 tons, mold: square plate (100 × 100 × 3 mmt; single side: skin-like shape, single side: mirror surface), molding temperature: C1- C2-C3-C4 = 180-190-200-210 ° C., injection pressure: P1-P2-P3-P4 = 108-98-88-78 MPa, injection speed: V1-V2-V3-V4 = 30-30-20 -20%, screw back pressure: free, screw rotation speed: 60%, mold temperature: 40 ° C, cycle: injection 10 seconds, cooling 20 seconds, 10 shots continuous molding, 6-10 shot molding An object (test piece A) was collected.
The squeezed surface appearance of the test piece was visually observed and evaluated in three stages.
3: The coating film is not Hitachi, 2: The coating film is inconspicuous, 1: The coating film stands out.

[Examples 1 to 3, Comparative Examples 1 to 4]
・ Materials used (1) Waste plastic containing recovered coating film
As a pulverized waste plastic mixed with a coating film to be recycled, a polypropylene automobile bumper cleaning product collected from the market was pulverized to 5 to 16 mm.
Using a biaxial kneader (UME40-48T manufactured by Ube Industries Co., Ltd.), this pulverized waste plastic to be recycled is melt-kneaded under the conditions of barrel temperature: 220 ° C. and throughput: 60 kg / h. Pellets were obtained. This waste plastic pellet was a polypropylene resin having an MFR of 26 g / 10 min and containing about 10% by weight of talc.
The amount of coating film in the waste plastic pulverized product to be recycled is 10 g of waste plastic pellets placed in a 500 cc eggplant-shaped flask, and 500 cc p-xylene is injected, followed by boiling and stirring for 30 minutes to dissolve the adhered resin. Then, it was about 1.4% by weight when immediately obtained using an aspirator type filter by hot filtration with 5A filter paper and measuring the filtration residue. The waste plastic pellets had L * of 25.55, a * of −0.19, and b * of −0.52.

(2) Pigment:
1) Carbon black: average particle diameter of 0.017 μm (furnace method).
2) Titanium dioxide: average particle size 0.22 μm, DOP oil absorption 14 (cc / 100 g), pH 5.5 to 7.5.
3) Titanium yellow: average particle size 0.91, DOP oil absorption 25, pH 7.8.
4) Petal: average particle size 0.16 μm, DOP oil absorption 23 (cc / 100 g), pH 5-7.

(3) Inorganic filler 1) Talc has an average particle diameter (laser diffraction method) of 2.7 μm.

(4) Thermoplastic resin 1) Crystalline polypropylene: (Homo) [Melt flow rate (MFR): 30 g / 10 min, Pendant fraction: 96.0%].
(5) Thermoplastic elastomer 1) Ethylene-propylene copolymer [Mooney viscosity (ML1 + 4 (100 ° C.): 35, ethylene content: 72% by weight).

(6) Other additive components:
1) Dispersant: Magnesium stearate.
2) Antioxidants: Irgafos 168, Irganox 1010.

-Production of recycled resin composition:
Dry blending of pulverized automobile bumpers subject to regeneration processing, thermoplastic resins, thermoplastic elastomers, inorganic fillers and pigments, dispersants and antioxidants in the proportions shown in Table 1 using a Platec blender After that, regenerated pellets were obtained using a kneader. In Comparative Example 1, regenerated pellets were obtained using a single screw extruder (65 mm single screw extruder manufactured by Ishinaka Iron Works Co., Ltd.) at 220 ° C. and 50 kg / hour without attaching a screen. In Comparative Examples 2 to 4 and Examples 1 to 3, a twin-screw kneader (manufactured by Ube Industries, Ltd .: UME40-48T) was used for melt kneading and regeneration under the conditions of barrel temperature: 220 ° C. and throughput: 60 kg / hour. Pellets were obtained. In Comparative Example 2, a screen was not attached to the kneader. In Comparative Examples 3, 4 and Examples 1 to 3, a 20-mesh screen was attached in front of the breaker plate to obtain recycled pellets.
After molding the obtained recycled pellets, mechanical properties were evaluated, and the results are shown in Table 1. Furthermore, the fluidity of the recycled pellets was evaluated and the results are shown in Table 1.

Claims (3)

Car bumper pulverized product (A), crystalline polypropylene (B), elastomer (C), inorganic filler (D), and light shielding pigment (E) containing 0.1 to 10% by weight of insoluble matter Is a resin composition obtained by mixing and heating and melting at the following ratio, and the size of the insoluble matter mixed in the resin composition passes through a 20 mesh screen. Resin composition.
(A) Car bumper pulverized product: 10 to 75% by weight,
(B) Crystalline polypropylene: 10 to 75% by weight,
(C) Elastomer: 0 to 10% by weight,
(D) Inorganic filler: 0 to 20% by weight,
(E) Light shielding pigment: 0.1 to 10% by weight.   The resin composition for vehicle interior according to claim 1, wherein the molded resin for vehicle interior has a flexural modulus of 1700 MPa or more, Izod of 40 J / m or more, and MFR of 15 g / 10 min or more. An injection-molded product obtained from the resin composition for car interior according to claim 1 or 2.