Resin compositions and automotive components

Abstract

To provide a resin composition including a biomass-derived filler, capable of suppressing odor emission and fogging attributable to it, and an automotive member including such a resin composition.SOLUTION: The resin composition comprises: an olefin-based thermoplastic resin and / or a thermoplastic elastomer; a biomass-derived filler; and a chemical adsorbent for chemically adsorbing a volatile organic compound (VOC) emitted from the filler. The filler has an average particle diameter of preferably 1-500 μm inclusive. The automotive member includes the resin composition according to the present invention.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to resin compositions and automotive components, and more particularly to resin compositions in which biomass-derived fillers are dispersed in an olefin-based thermoplastic resin and / or thermoplastic elastomer, and automotive components equipped therewith. [Background technology]

[0002] Olefin-based thermoplastic resins, such as polypropylene, are used in a variety of applications due to their excellent strength, impact resistance, and heat resistance. In particular, filler-reinforced polypropylene (PPF), which has fillers dispersed in polypropylene, is highly rigid and has excellent impact resistance, making it a popular material for automotive interior parts. Filler-reinforced plastics like PPF are generally manufactured by molding a mixture of resin and fillers at high temperatures.

[0003] In recent years, sustainable development has been demanded to protect the global environment. In filler-reinforced plastics, it is desirable to utilize biomass resources not only for the resin but also for the fillers. Examples of biomass-derived fillers include scallop shells, eggshells, wood, pulp, bamboo, bagasse, and rice husks. However, when biomass-derived fillers are kneaded with resin at high temperatures, a significant odor is generated from the biomass-derived fillers (especially those containing cellulose), which can worsen the working environment.

[0004] Therefore, various proposals have been made to solve this problem. For example, Patent Document 1 discloses a polypropylene resin composition comprising a polypropylene resin (A) having a melting point of 150°C or higher, a polypropylene resin (B) having a melting point of 110°C or higher and less than 150°C, and a biomass material (C). The document states: (a) By setting the melting point of the polypropylene resin (B) to less than 150°C, the temperature at which the polypropylene resin composition is molded can be made relatively low, and (b) This suppresses the generation of odors and ensures moldability and product quality. It is stated.

[0005] Patent Document 1 describes that when molding a filler-reinforced resin containing biomass-derived fillers, lowering the molding temperature can suppress odor generation. However, it is difficult to completely suppress odor generation by lowering the molding temperature alone. Furthermore, even after molding, odor components may be emitted from the molded product, which can cause fogging. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2021-050270 [Overview of the project] [Problems that the invention aims to solve]

[0007] The problem that this invention aims to solve is to suppress odor generation and the resulting fogging in a resin composition containing a biomass-derived filler. Another problem that the present invention aims to solve is to provide an automotive component comprising such a resin composition. [Means for solving the problem]

[0008] To solve the above problems, the resin composition according to the present invention is Olefin-based thermoplastic resin and / or thermoplastic elastomer, Biomass-derived fillers, A chemical adsorbent for chemically adsorbing volatile organic compounds (VOCs) generated from the filler, Includes.

[0009] The automotive component according to the present invention comprises the resin composition according to the present invention. [Effects of the Invention]

[0010] When dispersing biomass-derived fillers in olefin-based thermoplastic resins and / or thermoplastic elastomers, adding a chemical adsorbent to the raw materials further traps volatile organic compounds (VOCs) even if they are generated from the heated raw materials or molded product. As a result, the generation of odors caused by VOCs and the resulting fogging can be suppressed. [Modes for carrying out the invention]

[0011] One embodiment of the present invention will be described in detail below. [1. Resin composition] The resin composition according to the present invention is Olefin-based thermoplastic resin and / or thermoplastic elastomer, Biomass-derived fillers, A chemical adsorbent for chemically adsorbing volatile organic compounds (VOCs) generated from the filler, Includes.

[0012] [1.1. Main components] [1.1.1. Olefin-based thermoplastic resins and thermoplastic elastomers] The matrix of the resin composition is composed of an olefin-based thermoplastic resin and / or a thermoplastic elastomer. The resin composition may contain either an olefin-based thermoplastic resin or a thermoplastic elastomer, or it may contain both.

[0013] In the present invention, the types of olefin-based thermoplastic resins and thermoplastic elastomers are not particularly limited, and the optimal material can be selected according to the purpose. Specific examples of olefin-based thermoplastic resins and thermoplastic elastomers include the following. The resin composition may contain any one of the following olefin-based thermoplastic resins or thermoplastic elastomers, or may contain two or more of them. Furthermore, the olefin-based thermoplastic resins and thermoplastic elastomers shown below may be synthesized using fossil fuel-derived olefins as raw materials, or may be synthesized using biomass-derived olefins as raw materials.

[0014] [1.1.1.1. Specific examples of olefin-based thermoplastic resins] (A) Polyethylene resin: Examples of polyethylene resins include (a) High-density polyethylene, (b) Linear low-density polyethylene, (c) Low-density polyethylene and the like. Linear low-density polyethylene is obtained by copolymerizing ethylene and a small amount of α-olefin. Examples of α-olefins include propylene, 1-butene, 1-pentene, 4-methyl-1-pentene, 1-heptene, 1-octene, and the like.

[0015] (B) Polypropylene resin: Examples of polypropylene resins include (a) Homopolypropylene (H-PP), (b) Block polypropylene (B-PP) in which a compatibilizer (for example, ethylene propylene rubber (EPR)) is present at the interface between H-PP and polyethylene (PE), (c) Propylene-α-olefin copolymer (R-PP) and the like. Examples of α-olefins that constitute propylene-α-olefin copolymers include ethylene, 1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene, 1-heptene, and 1-octene.

[0016] (C) Ethylene-vinyl acetate copolymer. Ethylene-vinyl acetate copolymer (EVA) is a copolymer of ethylene and vinyl acetate. The vinyl acetate content in EVA is typically 10-40 mass%.

[0017] [1.1.1.2. Specific Examples of Thermoplastic Elastomers] (D) Olefin-based thermoplastic elastomers: Examples of olefin-based thermoplastic elastomers include, (a) Copolymer of ethylene and α-olefin having 3 to 20 carbon atoms, (b) Copolymer of ethylene with α-olefins having 3 to 20 carbon atoms and cyclic olefins, (c) Ethylene copolymers using various vinyl compounds such as styrene, vinyl acetate, (meth)acrylic acid, and (meth)acrylic acid esters as comonomers. (d) Copolymer of propylene and α-olefin having 4 to 20 carbon atoms, (e) A copolymer of propylene, α-olefins having 4 to 20 carbon atoms, and cyclic olefins. (f) Propylene copolymers using various vinyl compounds such as styrene, vinyl acetate, (meth)acrylic acid, and (meth)acrylic acid esters as comonomers. (g) A mixture of at least one selected from the group consisting of polyethylene and polypropylene, and at least one selected from the group consisting of polybutadiene, hydrogenated polybutadiene, polyisoprene, hydrogenated polyisoprene, polyisobutylene, ethylene-propylene copolymer, ethylene-propylene-diene copolymer, ethylene-butene copolymer, hydrogenated styrene-butadiene, and α-olefin copolymer. These are some examples.

[0018] When the olefin-based thermoplastic elastomer is a copolymer, the copolymerization method can be either block copolymerization or graft copolymerization. Furthermore, the olefin-based thermoplastic elastomer may be modified with at least one functional group selected from the group consisting of acid anhydride groups, carboxyl groups, amino groups, imino groups, alkoxysilyl groups, silanol groups, silyl ether groups, hydroxyl groups, and epoxy groups.

[0019] (E) Styrene-based thermoplastic elastomers: Styrene-based thermoplastic elastomers are block copolymers having blocks of styrene polymers or copolymers and blocks of conjugated diene compounds. Examples of conjugated diene compounds include isoprene and butadiene. Furthermore, styrene-based thermoplastic elastomers may also have hydrogenation added to the double bond portions.

[0020] Examples of styrene-based thermoplastic elastomers include, (a) Styrene-isoprene block copolymer, (b) Styrene-isoprene-styrene block copolymer, (c) Styrene-butadiene block copolymer, (d) Styrene-butadiene-styrene block copolymer, (e) Styrene-ethylene / butylene-styrene block copolymer (SEBS), (f) Styrene-ethylene / propylene-styrene block copolymer (SEPS), (g) Styrene-ethylene / butylene block copolymer (SEB), (h) Styrene-ethylene / propylene block copolymer (SEP), (i) Styrene-ethylene / butylene-crystalline olefin block copolymer (SEBC) These are some examples.

[0021] (F) Vinyl chloride-based thermoplastic elastomer: Vinyl chloride-based thermoplastic elastomers are elastomers in which both the hard segment and the soft segment are made of polyvinyl chloride.

[0022] (G) Polyurethane-based thermoplastic elastomers: Polyurethane-based thermoplastic elastomers are elastomers in which the hard segment is made of polyurethane and the soft segment is made of polyether, polyester, or the like.

[0023] (H) Polyester-based thermoplastic elastomer: Polyester-based thermoplastic elastomers are elastomers in which the hard segment is made of polyester and the soft segment is made of polyether.

[0024] (I) Polyamide-based thermoplastic elastomers: Polyamide-based thermoplastic elastomers are elastomers in which the hard segment is made of polyamide and the soft segment is made of polypropylene glycol (PPG), polytetramethylene glycol (PTMG), etc.

[0025] [1.1.2. Fillers] [A. Materials] The filler is dispersed within a matrix consisting of an olefin-based thermoplastic resin and / or a thermoplastic elastomer. In this invention, "filler" refers to a biomass-derived filler. The filler is preferably a cellulose-containing filler, in other words, a plant-derived filler (derived from lignocellulosic biomass or cellulosic biomass). Specific examples of cellulose-containing fillers are as follows. The resin composition may contain one of the following fillers, or two or more.

[0026] Examples of fillers derived from cellulosic biomass include, (a) Alpha fiber flocs obtained by alkali treatment and mechanical shredding of wood pulp, (b) Cotton linters, cotton flocks, obtained from cottonseed (c) Rayon flock, which is made by shredding rayon. These are some examples.

[0027] Examples of lignocellulose-based biomass-derived fillers include: (a) Wood pulp, refiner graft pulp (RGP), paper pulp, recycled paper, (b) Crushed wood chips, (c) Wood powder consisting of crushed materials such as pine, fir, poplar, bamboo, bagasse, and oil palm trunks, sawdust, and wood shavings. (d) Fruit flour consisting of crushed fruit such as walnuts, peanuts, and coconuts. (e) Rice husk powder, These are some examples.

[0028] Furthermore, fillers, (a) Esterified cellulosic biomass in which a polybasic acid anhydride is added to the hydroxyl group of cellulosic biomass, (b) Esterified lignocellulosic biomass in which a polybasic acid anhydride is added to the hydroxyl group of lignocellulosic biomass, (c) Oligoesterified cellulosic biomass obtained by adding a polybasic acid anhydride and a monoepoxy compound to the hydroxyl groups of cellulosic biomass. (d) Oligoesterified lignocellulosic biomass in which a polybasic acid anhydride and a monoepoxy compound are added to the hydroxyl groups of lignocellulosic biomass, (e) Oligoesterified cellulosic biomass obtained by adding a polybasic acid anhydride and a polyhydric alcohol to the hydroxyl groups of cellulosic biomass, (f) Oligoesterified lignocellulosic biomass obtained by adding polybasic acid anhydride and polyhydric alcohol to the hydroxyl groups of lignocellulosic biomass. It's also acceptable if it originates from [something].

[0029] [B. Shape] In this invention, the shape of the filler is not particularly limited, and the optimal shape can be selected according to the purpose. Examples of filler shapes include spherical, needle-shaped, and plate-shaped fillers.

[0030] [C. Average particle size] "Average particle size of filler" refers to the median diameter (D) measured by laser diffraction scattering. 50 ) refers to. In this invention, the average particle size of the filler is not particularly limited, and an optimal value can be selected depending on the purpose.

[0031] Generally, if the average particle size of the filler becomes too small, uniform dispersion of the filler may become difficult. Therefore, the average particle size of the filler is preferably 1 μm or larger. More preferably, the average particle size is 5 μm or larger, and even more preferably, 10 μm or larger. On the other hand, if the average particle size of the filler becomes too large, the mechanical properties of the resin composition may deteriorate. Therefore, the average particle size of the filler is preferably 500 μm or less. More preferably, the average particle size is 350 μm or less, and even more preferably, 200 μm or less.

[0032] [1.1.3. Chemoadsorbents] A "chemical adsorbent" refers to a compound (additive) that possesses the reactivity to chemically adsorb volatile organic compounds (VOCs) mainly generated from fillers when a resin composition or a raw material mixture for producing it is subjected to heating, light irradiation, etc. Examples of VOCs include aldehydes, ketones, and carboxylic acids. Specific examples of chemical adsorbents include the following. The resin composition may contain one of the following chemical adsorbents, or two or more.

[0033] (A) Chemical adsorbents consisting of organic compounds having an amino group or an amide group: Examples of chemical adsorbents consisting of organic compounds having an amino group include alkylamines, tetramethylenediamines, ethanolamines, and piperidines. Examples of chemical adsorbents consisting of compounds having an amide group include 2-acrylamido-2-methylpropanesulfonic acid.

[0034] (B) Chemoadsorbents consisting of basic inorganic compounds: Examples of chemisorbents consisting of basic inorganic compounds include, (a) Hydroxides such as sodium hydroxide, calcium hydroxide, potassium hydroxide, magnesium hydroxide, and iron hydroxide, (b) Basic oxides such as sodium oxide, magnesium oxide, and calcium oxide, (c) Carbonates or bicarbonates such as sodium carbonate, sodium bicarbonate, and calcium carbonate These are some examples.

[0035] Among these, calcium oxide is suitable as a chemical adsorbent because it has excellent adsorption effects on VOCs and glass clouding components. For example, when an aldehyde is oxidized to a carboxylic acid by heat or light, calcium oxide quickly adsorbs the carboxylic acid. Calcium oxide may be of mineral origin or of biological origin (for example, calcined scallop shells or eggshells). Among fillers, wood powder has high hygroscopicity, so when heated, it easily decomposes oils and fats, releasing higher fatty acids. This is thought to cause the decomposed oil products to volatilize. In contrast, when calcium oxide is further added to a resin composition containing wood powder as a filler, the calcium oxide chemically adsorbs the decomposed oil products. As a result, odor and glass fogging are thought to be suppressed.

[0036] The chemical adsorbent may be added directly to the resin composition. Alternatively, the chemical adsorbent may be supported on the surface of an inorganic porous material and then added to the resin composition. Inorganic porous materials are not particularly limited, as long as they are inorganic compounds having numerous pores on their surface. Examples of materials for inorganic porous materials include zeolites, silicon dioxide, activated carbon, titania, calcium phosphate, alumina, aluminum hydroxide, and magnesium hydroxide. Furthermore, examples of shapes for inorganic porous materials include spherical, rod-shaped, and elliptical shapes.

[0037] [1.2. Minor Components] The resin composition according to the present invention may consist only of the above-mentioned main components and unavoidable impurities, or it may also contain various minor components in addition to these. Specifically, the minor components include the following:

[0038] [1.2.1. Compatibilizers] The resin composition according to the present invention may contain a compatibilizer. A "compatibilizer" refers to an additive used to make olefin-based thermoplastic resins and / or thermoplastic elastomers compatible with fillers. In the present invention, the compatibilizer is not particularly limited as long as it performs the function described above. Specific examples of compatibilizers include the following. The resin composition may contain one of these compatibilizers, or it may contain two or more.

[0039] (A) Saturated carboxylic acid compatibilizers: Examples of saturated carboxylic acid compatibilizers include saturated carboxylic acids and derivatives of saturated carboxylic acids. Examples of saturated carboxylic acids include succinic anhydride, phthalic acid anhydride, tetrahydrophthalic anhydride, and adipic anhydride. Examples of derivatives of saturated carboxylic acids include metal salts, amides, imides, and esters of saturated carboxylic acids.

[0040] (B) Unsaturated carboxylic acid compatibilizers: Examples of unsaturated carboxylic acid compatibilizers include unsaturated carboxylic acids, derivatives of unsaturated carboxylic acids, and olefin-based thermoplastic resins modified with unsaturated carboxylic acids or their derivatives. Examples of unsaturated carboxylic acids include maleic anhydride, nadic anhydride, itaconic anhydride, citraconic anhydride, crotonic acid, isocrotonic acid, mesaconic acid, angelic acid, sorbic acid, and acrylic acid. Examples of derivatives of unsaturated carboxylic acids include metal salts, amides, imides, and esters of unsaturated carboxylic acids.

[0041] [1.2.2. Antioxidants] The resin composition according to the present invention may contain an antioxidant. An "antioxidant" refers to an additive used to suppress the oxidation of a resin composition by radicals. Examples of antioxidants include phenolic antioxidants that have the function of capturing radicals, and phosphorus-based antioxidants that have the function of decomposing hydrogen peroxide. The resin composition according to the present invention may contain one of these antioxidants, or it may contain two or more.

[0042] [1.2.3. Weather-resistant agents] The resin composition according to the present invention may contain a weather-resistant agent. "Weathering agent" refers to an additive used to suppress the deterioration of a resin composition due to natural outdoor environmental conditions such as sunlight, temperature, humidity, and rain. Examples of weathering agents include ultraviolet absorbers for absorbing ultraviolet rays and light stabilizers for stabilizing radicals generated by ultraviolet rays. The resin composition according to the present invention may contain one of these weathering agents, or it may contain two or more.

[0043] [1.2.4. Other minor components] The resin composition according to the present invention may further contain other auxiliary components not mentioned above. Other minor components include, for example, nucleating agents, heat stabilizers, antistatic agents, slip agents, antiblocking agents, antifogging agents, neutralizing agents, metal deactivators, surfactants, colorants, antibacterial and antifungal agents, flame retardants, plasticizers, dispersants, fillers, foaming agents, crosslinking agents, conductive agents, preservatives, fragrances, deodorizers, and insecticides. The resin composition may further contain one of these minor components, or two or more of them.

[0044] [1.3. Composition] [1.3.1. Filler content] The resin composition according to the present invention preferably satisfies the following formula (1). 0 <X≦60mass% …(1) However, X (mass%) is the ratio of the mass of the filler to the total mass of the resin composition.

[0045] In general, if X becomes too small, the mechanical properties may deteriorate. Therefore, it is preferable for X to be greater than 0. More preferably, X is 5 mass% or more, and even more preferably 10 mass% or more. On the other hand, if X becomes too large, it may become difficult to uniformly disperse the filler within the olefin-based thermoplastic resin and / or thermoplastic elastomer. Therefore, X is preferably 60 mass% or less. More preferably, X is 50% or less, 40% or less, or 30% or less.

[0046] [1.3.2. Content of chemisorbents] The resin composition according to the present invention preferably satisfies the following formula (2). 0.1 ≤ Y ≤ 15 mass % …(2) However, Y (mass%) is the ratio of the mass of the chemical adsorbent to the total mass of the resin composition.

[0047] If Y becomes too small, it may become difficult to suppress odor generation and fogging. Therefore, Y is preferably 0.1 mass% or more. Z is more preferably 0.3 mass% or more, 0.5 mass% or more, or 1.0 mass% or more. On the other hand, if Y becomes too large, not only will the effect as a chemical adsorbent saturate, but the mechanical properties may also deteriorate. Therefore, Y is preferably 15 mass% or less. More preferably, Y is 10 mass% or less, 9 mass% or less, 8 mass% or less, 7 mass% or less, 6 mass% or less, 5 mass% or less, 4 mass% or less, or 3 mass% or less.

[0048] [1.3.2. Content of minor components] The resin composition according to the present invention may comprise a filler and a chemical adsorbent, with the remainder being an olefin-based thermoplastic resin and / or thermoplastic elastomer, and unavoidable impurities. Alternatively, the resin composition according to the present invention may comprise a filler, a chemical adsorbent, and one or more minor components, with the remainder being an olefin-based thermoplastic resin and / or thermoplastic elastomer, and unavoidable impurities. When a resin composition contains auxiliary components, the amount of these auxiliary components is not particularly limited, and the optimal amount can be selected depending on the purpose.

[0049] [1.4. Usage] The resin composition according to the present invention can be used for various applications. Examples of applications of the resin composition according to the present invention include: (a) Automotive components, (b) Pellets that will be used as raw materials for manufacturing injection molded articles, (c) Masterbatch with filler dispersed at a high concentration These are some examples.

[0050] Examples of automotive components comprising the resin composition according to the present invention include: (a-1) Interior components such as instrument panel, trim, deck board, pillars, engine cover, etc. (a-2) Exterior components such as bumpers, moldings, fenders, spats, weatherstrips, glass runs, and wipers. These are some examples.

[0051] [2. Method for producing resin compositions] The resin composition according to the present invention is (a) The main components and, if necessary, the secondary components are blended in a predetermined ratio. (b) Mixing the raw material mixture while heating it to a predetermined temperature, and shaping the mixture into a predetermined form. It is obtained by doing so.

[0052] The heating temperature of the raw materials is not particularly limited, and the optimal temperature can be selected according to the purpose. Generally, the higher the heating temperature, the easier it is to uniformly disperse the filler. On the other hand, if the heating temperature is too high, the resin may discolor, or volatile organic compounds (VOCs) may be more likely to be generated from the filler. To suppress resin discoloration and VOC generation, a heating temperature of 200°C or lower is preferable.

[0053] [3. Effect] When dispersing biomass-derived fillers in olefin-based thermoplastic resins and / or thermoplastic elastomers, adding a chemical adsorbent to the raw materials further traps volatile organic compounds (VOCs) even if they are generated from the heated raw materials or molded product. As a result, the generation of odors caused by VOCs and the resulting fogging can be suppressed. [Examples]

[0054] (Examples 1-5, Comparative Examples 1-3, Reference Examples 1-3) [1. Sample Preparation] The raw materials shown in Table 1 were blended in the proportions shown in Table 1 to obtain a raw material mixture. The raw material mixture was melt-kneaded in a twin-screw extruder to produce pellets. The molding temperature was 170°C. Next, the pellets were fed into an injection molding machine, and the test specimen material was injection molded. The injection molding temperature was set to 180°C. Test specimens of a predetermined size were cut from the obtained test specimen material, and various tests were conducted.

[0055] For the olefin-based thermoplastic resin, we used block polypropylene (B-PP) (manufactured by Nippon Polypropylene Co., Ltd., BC04ASW), and for the thermoplastic elastomer, we used ethylene octene rubber (EOR) (manufactured by Dow Chemical Japan Ltd., ENGAGE8180). The filler contains, (a) Average particle size: 70-150 μm wood powder (Examples 1-2, Comparative Examples 1-3) (manufactured by Rettenmeyer Japan Co., Ltd., ARBOCEL C-100) (b) Wood flour with an average particle size of 20-40 μm (Examples 3-5) (manufactured by Rettenmeyer Japan Co., Ltd., ARBOCEL CW630PU), or (c) Talc (Reference Example 1) (Manufactured by Kaijo Co., Ltd., SK-7800) I used it.

[0056] Maleic anhydride-modified polypropylene (PRIEX 20097, manufactured by BIC Chemie Japan Co., Ltd.) was used as the compatibilizer. Chemical adsorbents include, (a) CaO-based chemical adsorbent (manufactured by BYK-Chemie Japan Co., Ltd., BYK-MAX OR 4206, CaO content: 10-20%) (b) CaO-based chemical adsorbent (manufactured by BIC Chemie Japan Co., Ltd., RECYCLOBYK 4371, CaO content: 30-40%), or (c) Amine-based chemical adsorbent (manufactured by Otsuka Chemical Co., Ltd., H-6000HS), I used it.

[0057] Furthermore, other additives include, (a) Phenolic antioxidant (manufactured by ADEKA Corporation, AO-60), (b) Phosphorus-based antioxidant (manufactured by ADEKA Corporation, 2112), and (c) Weather-resistant agent (BASF Corporation, XT-855) I used it.

[0058] [Table 1]

[0059] [2. Test Method] [2.1. Mechanical Properties] [2.1.1. Specific gravity] The specific gravity of the test specimens was measured in accordance with JIS K 7112.

[0060] [2.1.2. Bending Strength] The bending strength and modulus of elasticity were measured in accordance with ISO 178. The bending strength is preferably 20 MPa or higher. More preferably 23 MPa or higher, and even more preferably 25 MPa or higher. There is no particular upper limit to the bending strength, but it is usually 80 MPa or lower. Furthermore, a flexural modulus of elasticity of 1000 MPa or higher is preferable. More preferably, a flexural modulus of elasticity of 1200 MPa or higher is preferable, and even more preferably, 1400 MPa or higher is preferable. There is no particular upper limit to the flexural modulus of elasticity, but it is usually 8000 MPa or lower.

[0061] [2.1.3. Impact Value] A Charpy impact test was conducted in accordance with ISO 179 / 1eA. The test conditions were 23°C with a notch, or -30°C with a notch. The impact value at 23°C is 2.0 kJ / m 2 The above is preferable. The impact value at 23°C is more preferably 3.0 kJ / m 2 More preferably, 5.0 kJ / m 2 That's all. A higher shock value at 23°C is better. Furthermore, the impact value at -30℃ is 1.2 kJ / m 2 The above is preferable. The impact value at -30°C is more preferably 1.5 kJ / m 2 More preferably, 2.0 kJ / m 2 That's all. A higher shock value at -30°C is better.

[0062] [2.1.4. Temperature Deflection under Load (HDT)] The temperature of deflection (HDT) was measured in accordance with ISO 75-2. The bending stress (load) was set to 0.45 MPa. Furthermore, the HDT is preferably 90°C or higher. More preferably, the HDT is 100°C or higher, and even more preferably, 110°C or higher. There is no particular upper limit to the HDT, but it is usually 200°C or lower.

[0063] [2.2. Odor Characteristics] [2.2.1. VOC] Volatile organic compounds (VOCs) were measured under indoor conditions of 23±2°C and 50±5%RH humidity. Analysis was performed within 14 days of preparing the test specimens. The inside of a 10L Tedlar® bag was purged with pure nitrogen gas three times. A test specimen (100mm x 80mm x t2mm) was placed inside the bag and sealed. The bag was heated at 65°C for 2 hours in a hot air dryer, after which volatile components inside the bag were adsorbed onto silica gel. Furthermore, the volatile components adsorbed onto the silica gel were extracted with a solvent and analyzed by high-performance liquid chromatography (HPLC). The total amount of volatile components (aldehydes) was measured by comparison with a standard sample.

[0064] When the VOC is HCHO, the volatilization amount is preferably 1.0 μg / particle or less. More preferably, the volatilization amount is 0.5 μg / particle or less, and even more preferably, 0.1 μg / particle or less. The lower the volatilization amount of HCHO, the better. Furthermore, when the VOC is CH3CHO, the volatilization amount is preferably 1.6 μg / particle or less. More preferably, the volatilization amount is 1.0 μg / particle or less, and even more preferably, 0.5 μg / particle or less. The lower the volatilization amount of CH3CHO, the better.

[0065] [2.2.2. Glass haze (foging)] Glass haze measurements were performed under room temperature conditions of 23°C ± 2°C and 50 ± 5% RH. Analysis was carried out within 14 days of specimen preparation. A glass plate with dimensions of □47 mm × t3 mm (glass haze degree ≤ 0.5%) was used. Two test pieces (each with dimensions of 100 mm × 25 mm × t2 mm) were placed inside a glass bottle, and the bottle was covered with the glass plate. In this state, the glass bottle was heated in an oil bath at 80 ± 2 °C for 20 hours. One hour after the test ended, the glass haze degree (%) of the glass plate was measured using an integrating sphere type light transmittance measuring device.

[0066] Note that the glass haze is preferably 5% or less. More preferably, the glass haze is 3% or less, and even more preferably, it is 1.5% or less. The smaller the glass haze, the better.

[0067] [3. Results] [3.1. Mechanical Properties] The results are shown in Table 2. From Table 2, the following can be understood. (1) In Reference Example 1, both the mechanical properties and the odor properties were good, but the specific gravity exceeded 1.0. This is considered to be because talc was used as the filler. (2) In Reference Examples 2 and 3, the odor properties were good, but the elastic modulus was less than 1400 MPa, and the heat distortion temperature under load also decreased to less than 100 °C. This is considered to be because no filler was included. Furthermore, in Reference Example 3, the flexural strength decreased to less than 25 MPa. This is considered to be because the amount of elastomer was increased.

[0068] (3) In Comparative Example 1, the flexural strength was 25 MPa or more, the elastic modulus was 1400 MPa or more, and the impact value at -30 °C was 2.0 kJ / m 2 or more. However, in Comparative Example 1, the impact value at room temperature decreased to less than 5 kJ / m 2 . This is considered to be because the filler was not uniformly dispersed due to the absence of a compatibilizer. Also, in Comparative Example 1, the volatile amount of CH3CHO exceeded 1.60 μg / unit, and the glass haze degree exceeded 5%. This is considered to be because no chemical adsorbent was included. (4) Comparative Examples 2 and 3 had good mechanical properties because they contained fillers and compatibilizers. However, Comparative Examples 2 and 3 had poor odor properties. In particular, Comparative Example 2 had a volatilization amount of HCHO exceeding 1.00 μg / particle. This is thought to be because it did not contain a chemiadsorbent.

[0069] (5) The components adhering to the glass plates during the glass haze tests of Comparative Examples 1 to 3 were analyzed using a Fourier transform infrared spectrophotometer (FT-IR). As a result, it was found that the origin of the glass haze in Comparative Examples 1 to 3 was mainly fatty acid esters. (6) Examples 1 to 5 showed good mechanical and odor properties. However, Examples 3 to 5 had a specific gravity exceeding 1.0. This was due to the high amount of wood flour used. (7) The amount of CH3CHO generated tended to be suppressed as the amount of CaO added increased. Furthermore, the amount of CH3CHO generated tended to be suppressed even further when CaO-based chemical adsorbents and amine-based chemical adsorbents were used in combination.

[0070] [Table 2]

[0071] Although embodiments of the present invention have been described in detail above, the present invention is not limited in any way to the above embodiments, and various modifications are possible without departing from the spirit of the present invention. [Industrial applicability]

[0072] The resin composition according to the present invention can be used in injection molded articles, pellets that serve as raw materials for manufacturing injection molded articles, masterbatches in which fillers are dispersed at a high concentration, and the like.

Claims

1. Olefin-based thermoplastic resin and / or thermoplastic elastomer, Biomass-derived fillers, A chemical adsorbent for chemically adsorbing volatile organic compounds (VOCs) generated from the filler, Includes, The filler generates aldehydes, ketones, or carboxylic acids as volatile organic compounds (VOCs). The average particle size of the filler is 1 μm or more and 40 μm or less. The chemical adsorbent is selected from organic compounds having an amino group, organic compounds having an amide group, or basic inorganic compounds. Resin composition.

2. Olefin-based thermoplastic resin and / or thermoplastic elastomer, Biomass-derived fillers, A chemical adsorbent for chemically adsorbing volatile organic compounds (VOCs) generated from the filler, Maleic anhydride-modified polypropylene and Includes, The filler generates aldehydes, ketones, or carboxylic acids as volatile organic compounds (VOCs). The aforementioned chemical adsorbent, Organic compounds having an amide group, Sodium hydroxide, potassium hydroxide, magnesium hydroxide, iron hydroxide, Sodium oxide, or carbonate or bicarbonate Includes, Furthermore, a resin composition that satisfies either (a) or (b) below. (a) The chemical adsorbent further contains calcium oxide. (i) The following equation (2) is satisfied. 0.1 ≤ Y ≤ 15 mass% …(2) However, Y (mass%) is the ratio of the mass of the chemical adsorbent to the total mass of the resin composition.

3. An olefin-based thermoplastic resin and / or thermoplastic elastomer, Biomass-derived fillers, A chemical adsorbent for chemically adsorbing volatile organic compounds (VOCs) generated from the filler, Includes, The filler generates aldehydes, ketones, or carboxylic acids as volatile organic compounds (VOCs). The aforementioned chemical adsorbent, Organic compounds having an amide group, Sodium hydroxide, potassium hydroxide, magnesium hydroxide, iron hydroxide, Sodium oxide or bicarbonate Includes, Furthermore, a resin composition that satisfies either (a) or (b) below. (a) The chemical adsorbent further contains calcium oxide. (i) The following equation (2) is satisfied. 0.1 ≤ Y ≤ 15 mass% …(2) However, Y (mass%) is the ratio of the mass of the chemical adsorbent to the total mass of the resin composition.

4. An olefin-based thermoplastic resin and / or thermoplastic elastomer, Biomass-derived fillers, A chemical adsorbent for chemically adsorbing volatile organic compounds (VOCs) generated from the filler, Maleic anhydride-modified polypropylene and Includes, The filler generates aldehydes, ketones, or carboxylic acids as volatile organic compounds (VOCs). The aforementioned chemical adsorbent, Organic compounds having an amide group, Sodium hydroxide, potassium hydroxide, iron hydroxide, Sodium oxide, or carbonate or bicarbonate A resin composition containing the following:

5. An olefin-based thermoplastic resin and / or thermoplastic elastomer, Biomass-derived fillers, A chemical adsorbent for chemically adsorbing volatile organic compounds (VOCs) generated from the filler, Includes, The filler generates aldehydes, ketones, or carboxylic acids as volatile organic compounds (VOCs). The aforementioned chemical adsorbent, Organic compounds having an amide group, Sodium hydroxide, potassium hydroxide, iron hydroxide, Sodium oxide or bicarbonate A resin composition containing the following:

6. Olefin-based thermoplastic resin and / or thermoplastic elastomer, Biomass-derived fillers, A chemical adsorbent for chemically adsorbing volatile organic compounds (VOCs) generated from the filler, Includes, The chemical adsorbent consists of an organic compound having an amino group and calcium oxide. When the volatile organic compound (VOC) is HClO, the amount of volatile organic compound (VOC) released is 0.1 μg / particle or less. The volatile organic compound (VOC) is CH 3 When it is CHO, the volatilization amount of the VOC is 0.5 μg / particle or less. Resin composition. However, the amount of volatile organic compounds (VOCs) mentioned above refers to the value measured within 14 days of preparing the test specimen under indoor conditions of a temperature of 23±2°C and a humidity of 50±5%RH.

7. Olefin-based thermoplastic resin and / or thermoplastic elastomer, Biomass-derived fillers, A chemical adsorbent for chemically adsorbing volatile organic compounds (VOCs) generated from the filler, Includes, The aforementioned chemical adsorbent, (a) an organic compound having an amino group or amide group, sodium hydroxide, potassium hydroxide, magnesium hydroxide, iron hydroxide, sodium oxide, or a carbonate or bicarbonate, (b) Calcium oxide and Includes, The calcium oxide content is 8 mass% or more and 15 mass% or less. Resin composition. However, the term "calcium oxide content" refers to the ratio of the mass of calcium oxide to the total mass of the resin composition.

8. Olefin-based thermoplastic resin and / or thermoplastic elastomer, Biomass-derived fillers, A chemical adsorbent for chemically adsorbing volatile organic compounds (VOCs) generated from the filler, Includes, The average particle size of the filler is 1 μm or more and 40 μm or less. The aforementioned chemical adsorbent consists of calcium oxide. The calcium oxide content is 8 mass% or more and 15 mass% or less. Resin composition. However, the term "calcium oxide content" refers to the ratio of the mass of calcium oxide to the total mass of the resin composition.

9. An automotive component comprising the resin composition according to any one of claims 1 to 8.

Images