Resin additive composition, resin composition, resin structure, and method for producing resin composition

Abstract

To provide a resin additive composition that is capable of imparting superior weather resistance to synthetic resins.SOLUTION: The present invention pertains to a resin additive composition containing (B-1) a hindered amine compound, (B-2) a phenolic antioxidant, and a carrier.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a resin additive composition, a resin composition, a resin structure, and a method for producing a resin composition.

Background Art

[0002] Various developments have been made on resin additive compositions for imparting weather resistance to synthetic resins. As this type of technology, for example, the technology described in Patent Document 1 is known. Patent Document 1 describes a resin additive composition in which a specific silica is impregnated with a specific hindered amine compound. Further, Patent Document 1 describes that this resin additive composition has excellent handleability and can impart excellent weather resistance to resins.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, as a result of investigations by the present inventors, it has been found that the resin additive composition described in Patent Document 1 above has room for further improvement in terms of weather resistance improvement performance.

Means for Solving the Problems

[0005] As a result of further investigations by the present inventors, it has been found that by blending a resin additive composition containing a hindered amine compound, a phenolic antioxidant, and a carrier with a synthetic resin, excellent weather resistance can be imparted to the synthetic resin, and the present invention has been completed.

[0006] Hereinafter, one aspect of the present invention provides the following resin additive composition, resin composition, and method for producing a resin composition. 1. A resin additive composition comprising (B-1) a hindered amine compound, (B-2) a phenolic antioxidant, and a carrier. 2. The resin additive composition according to 1., wherein the (B-1) hindered amine compound is adsorbed on the carrier. 3. The resin additive composition according to 1. or 2., wherein the (B-1) hindered amine compound contains one or more compounds represented by the following general formula (1). [Chemical formula] (In the above general formula (1), R 1 represents a hydrogen atom or a methyl group, and R 2 to R 5 each independently represents an alkyl group having 1 to 6 carbon atoms, and R 6 represents a fatty acid residue having 7 to 29 carbon atoms.) 4. A resin composition comprising (A) a synthetic resin and the resin additive composition according to any one of 1. to 3. 5. A resin structure formed from the resin composition according to 4. 6. A method for producing a resin composition, comprising the step of blending the resin additive composition according to any one of 1. to 3. with (A) a synthetic resin. [Advantages of the Invention]

[0007] According to the present invention, there are provided a resin additive composition capable of imparting excellent weather resistance to a synthetic resin, a resin composition using the same, a resin structure, and a method for producing a resin composition. [Embodiments for Carrying Out the Invention]

[0008] [Resin Additive Composition] The resin additive composition of the present embodiment will be described.

[0009] The resin additive composition of the present embodiment contains (B-1) a hindered amine compound, (B-2) a phenolic antioxidant, and a carrier.

[0010] According to the resin additive composition of this embodiment, excellent weather resistance can be imparted to the synthetic resin. Further, the resin additive composition of this embodiment is less likely to cause sticking (blocking) during storage, that is, it has excellent blocking resistance.

[0011] ((B-1) hindered amine compound) As the (B-1) hindered amine compound, it is preferable to contain at least one compound having a melting point of 80°C or lower, preferably 60°C or lower, more preferably 40°C or lower. In this case, the dispersibility of the resin additive composition with respect to the synthetic resin becomes excellent. Further, the (B-1) hindered amine compound may consist only of compounds having a melting point of 80°C or lower, preferably 60°C or lower, more preferably 40°C or lower. Here, the melting point refers to the value measured using a melting point measuring instrument (model number MP-90) manufactured by Mettler Toledo under the condition of a heating rate of 1°C / min.

[0012] The (B-1) hindered amine compound preferably contains one or more compounds represented by the following general formula (1). In this case, even more excellent weather resistance can be imparted to the synthetic resin.

[0013] [Chemical formula]

[0014] In the above general formula (1), R 1 represents a hydrogen atom or a methyl group, and R 2 ~R 5 each independently represents an alkyl group having 1 to 6 carbon atoms, and R 6 represents a fatty acid residue having 7 to 29 carbon atoms.

[0015] R 2 ~R 5Examples of the alkyl group having 1 to 6 carbon atoms represented by

[0016] R 6 The fatty acid residue having 7 to 29 carbon atoms represented by

[0017] R in the general formula (1) above 1 is particularly preferably a methyl group. In this case, the resin additive composition has excellent acid resistance and excellent weather resistance under conditions of being exposed to an acidic atmosphere such as acid rain.

[0018] Further, from the viewpoint of imparting more excellent weather resistance to the synthetic resin, R in the general formula (1) above 2 ~R 5 is preferably a methyl group, a tert-butyl group or a tert-pentyl group, and particularly preferably a methyl group.

[0019] Furthermore, from the viewpoint of improving the compatibility of the (B-1) hindered amine compound with the synthetic resin and imparting more excellent weather resistance to the synthetic resin, R in the general formula (1) above 6 is preferably a fatty acid residue having 9 to 25 carbon atoms, more preferably a fatty acid residue having 11 to 21 carbon atoms. Furthermore, R 6 is preferably a residue obtained by removing a carboxyl group from a saturated fatty acid.

[0020] (B-1) The hindered amine compound may contain one or more selected from the group consisting of, for example, the following Compound No. A1 to No. A6.

[0021] [Chemical formula]

[0022] ((B-2) Phenolic antioxidant)

[0023] (B-2) As the phenolic antioxidant, it is preferably to contain at least one compound having a melting point of 200 °C or lower, preferably 120 °C or lower, more preferably 80 °C or lower, and still more preferably 60 °C or lower. In this case, the dispersibility of the resin additive composition with respect to the synthetic resin becomes excellent. Further, (B-2) the phenolic antioxidant may consist only of a compound having a melting point of 200 °C or lower, preferably 120 °C or lower, more preferably 80 °C or lower, and still more preferably 60 °C or lower. (B-2) Examples of the phenolic antioxidant include hindered phenol compounds, semi-hindered phenol compounds, and res-hindered phenol compounds. From the viewpoint of imparting further excellent weather resistance to the synthetic resin, (B-2) the phenolic antioxidant preferably contains a hindered phenol compound or a semi-hindered phenol compound, and more preferably contains a hindered phenol compound.

[0024] (B-2) As the phenolic antioxidant, it is preferable to contain one or more compounds represented by the following general formula (2). In this case, further excellent weather resistance can be imparted to the synthetic resin.

[0025] [Chemical formula]

[0026] In the above general formula (2), R 7 and R 8Each independently represents an alkyl group having 1 to 6 carbon atoms, n represents 1, 2 or 4. When n is 1, X represents a fatty acid residue having 7 to 29 carbon atoms. When n is 2, X represents a divalent group represented by the following formula (a). When n is 4, X represents a tetravalent group represented by the following formula (b).

[0027] [Chemical formula]

[0028] [Chemical formula] (In the above formulas (a) and (b), * represents the position bonded to the oxygen atom in the general formula (2).)

[0029] (B-2) The phenolic antioxidant preferably contains one or more compounds represented by the above general formula (2) where n is 1 or 2, and more preferably contains one or more compounds represented by the above general formula (2) where n is 1. In this case, the weather resistance of the dark-colored synthetic resin composition obtained by blending the resin additive composition and the black pigment is excellent.

[0030] R 7 and R 8 Examples of the alkyl group having 1 to 6 carbon atoms represented by are the same as those exemplified as the alkyl group having 1 to 6 carbon atoms represented by R 2 ~R 5 in the above general formula (1). From the viewpoint of imparting more excellent weather resistance to the synthetic resin, R 7 and R 8 are preferably a methyl group, a tert-butyl group or a tert-pentyl group, and particularly preferably a tert-butyl group.

[0031] When n is 1, examples of the fatty acid residue having 7 to 29 carbon atoms represented by X are the same as those of R 6Examples thereof include those exemplified as the fatty acid residue having 7 to 29 carbon atoms represented by. (B-2) From the viewpoint of improving the compatibility of the phenolic antioxidant with the synthetic resin and imparting more excellent weather resistance to the synthetic resin, when n is 1, X is preferably a fatty acid residue having 10 to 26 carbon atoms, and more preferably a fatty acid residue having 12 to 22 carbon atoms. Furthermore, when n is 1, X is preferably a residue obtained by removing a carboxyl group from a saturated fatty acid.

[0032] (B-2) The phenolic antioxidant may contain one or more compounds represented by the following general formula (3). In this case, the blocking resistance of the resin additive composition becomes more excellent. Also, in this case, the heat resistance of the resin additive composition becomes excellent. Furthermore, in this case, the weather resistance of the dark-colored synthetic resin composition obtained by blending the resin additive composition and the black pigment becomes excellent.

[0033]

Chemical formula

[0034] In the above general formula (3), R 9 ~R 14 each independently represents an alkyl group having 1 to 6 carbon atoms, and Y represents a trivalent group represented by the following formula (c) or (d).

[0035]

Chemical formula

[0036]

Chemical formula

[0037] In the above formulas (c) and (d), * represents the position where it is bonded to the methylene group.

[0038] R 9 ~R 14 Examples of the alkyl group having 1 to 6 carbon atoms represented by include R in the above general formula (1)2 ~R 5 Examples of the alkyl group having 1 to 6 carbon atoms represented by ~R include those exemplified above. From the viewpoint of imparting even better weather resistance to the synthetic resin, R 9 ~R 14 is preferably a methyl group, a tert-butyl group or a tert-pentyl group, and particularly preferably a tert-butyl group.

[0039] Also, Y is preferably the above formula (c). In this case, the blocking resistance of the resin additive composition becomes even better. Also, in this case, the heat resistance of the resin additive composition becomes better. Further, in this case, the weather resistance of the dark-colored synthetic resin composition obtained by blending the resin additive composition and the black pigment becomes better.

[0040] From the viewpoint of making the balance of the weather resistance improvement performance, color tone, blocking resistance and heat resistance of the resin additive composition excellent, the (B-2) phenolic antioxidant may contain both the compound represented by the above general formula (2) where n is 1 and the compound represented by the above general formula (3).

[0041] (B-2) The phenolic antioxidant may contain, for example, one or more selected from the group consisting of the following Compounds No. B1 to No. B5.

[0042]

Chemical formula

[0043] In the resin additive composition of the present embodiment, the content Z of the (B-1) hindered amine compound 1 and the content Z of the (B-2) phenolic antioxidant with respect to 2 the ratio Z of 2 / Z 1 is, for example, preferably 0.05 or more and 10.0 or less in terms of mass. From the viewpoint of imparting even better weather resistance to the synthetic resin, Z 2 / Z 1It is preferably 0.1 or more and 4.0 or less, more preferably 0.15 or more and 2.5 or less, and even more preferably 0.2 or more and 1.5 or less.

[0044] (Carrier) The carrier is a substance that adsorbs at least one of the components contained in the resin additive composition. Specific examples of the carrier include inorganic carriers such as silica, alumina, silicate, zeolite, and carbon black, low molecular weight organic carriers such as cyclodextrin, crown ether, and calixarene, and high molecular weight organic carriers such as synthetic resins. These may be used alone or in combination of two or more. The carrier contained in the resin additive composition of this embodiment preferably contains something other than the high molecular weight organic carrier, more preferably contains one or more selected from the group consisting of inorganic carriers and low molecular weight organic carriers, and even more preferably contains an inorganic carrier. In this case, the resin additive composition will have excellent blocking resistance. From the viewpoint of making the blocking resistance even better, the inorganic carrier preferably contains silica, alumina, silicate or zeolite, more preferably contains silica, silicate or zeolite, even more preferably contains silica or silicate, and particularly preferably contains silica. Here, the silica may be either a natural product or a synthetic product, and may be either crystalline or amorphous. Also, the silica may be produced by a wet method such as the gel method or the precipitation method, or may be produced by a dry method such as the combustion method or the arc discharge / plasma discharge method. In this embodiment, from the viewpoint of making the blocking resistance of the resin additive composition even better, the silica is preferably produced by a wet method, and particularly preferably produced by the gel method.

[0045] The form of the carrier contained in the resin additive composition of the present embodiment may be, for example, powder, flake, granule, sheet, or the like. From the viewpoint of improving the dispersibility of the resin additive composition in the synthetic resin and imparting more excellent weather resistance to the synthetic resin, the carrier is preferably powder. Further, from the viewpoint of more effectively adsorbing the components contained in the resin additive composition and making the blocking resistance of the resin additive composition more excellent, the carrier is preferably porous.

[0046] When the carrier contained in the resin additive composition of the present embodiment is powder, the volume average particle diameter of the carrier may be, for example, 0.1 to 100 μm. From the viewpoint of making the blocking resistance of the resin additive composition excellent, the volume average particle diameter of the carrier is preferably 1 to 50 μm, and more preferably 3 to 25 μm. In the present embodiment, the volume average particle diameter of the carrier is the 50% integrated particle diameter measured by the laser diffraction / scattering method in accordance with ISO-13320.

[0047] Further, the specific surface area of the carrier contained in the resin additive composition of the present embodiment may be, for example, 100 to 1000 m 2 / g. From the viewpoint of making the blocking resistance of the resin additive composition excellent, the specific surface area of the carrier is preferably 120 to 800 m 2 / g, more preferably 200 to 750 m 2 / g, even more preferably 250 to 700 m 2 / g, and even more preferably 400 to 600 m 2 / g. In the present embodiment, the specific surface area of the carrier is the BET specific surface area measured in accordance with JIS Z 8830.

[0048] Furthermore, the moisture content of the carrier contained in the resin additive composition of the present embodiment may be, for example, 0.5 to 10% by mass. From the viewpoint of making the blocking resistance of the resin additive composition excellent, the moisture content of the carrier is preferably 2 to 9% by mass, more preferably 3 to 8% by mass, and even more preferably 3.5 to 7% by mass.

[0049] Furthermore, the oil absorption amount of the carrier contained in the resin additive composition of the present embodiment may be, for example, 10 to 1000 mL / 100 g. From the viewpoint of excellent blocking resistance of the resin additive composition, the oil absorption amount of the carrier is preferably 100 to 500 mL / 100 g, and more preferably 150 to 300 mL / 100 g. In the present embodiment, the oil absorption amount of the carrier is measured in accordance with JIS K 5101.

[0050] In the resin additive composition of the present embodiment, the content of the carrier may be, for example, 10 to 1000 parts by mass with respect to 100 parts by mass of the total amount of the (B-1) hindered amine compound and the (B-2) phenolic antioxidant contained in the resin additive composition. From the viewpoint of excellent balance between the weather resistance improvement performance and the blocking resistance of the resin additive composition, the content of the carrier is preferably 20 to 500 parts by mass, more preferably 25 to 400 parts by mass, further preferably 33 to 300 parts by mass, and even more preferably 50 to 200 parts by mass with respect to 100 parts by mass of the total amount of the (B-1) hindered amine compound and the (B-2) phenolic antioxidant.

[0051] The resin additive composition of the present embodiment may further contain a (B-3) benzoate compound. In this case, it is possible to impart even more excellent weather resistance to the synthetic resin. Here, the (B-3) benzoate compound preferably contains one or more compounds represented by the following general formula (5).

[0052]

Chemical formula

[0053] R 21 and R 22Examples of the alkyl group having 1 to 6 carbon atoms represented by R in the general formula (1) above include those exemplified as the alkyl group having 1 to 6 carbon atoms represented by R 2 ~R 5 above. From the viewpoint of imparting further excellent weather resistance to the synthetic resin, R 21 and R 22 are preferably a methyl group, a tert-butyl group or a tert-pentyl group, and particularly preferably a tert-butyl group. Examples of the fatty acid residue having 7 to 29 carbon atoms represented by R 23 include those exemplified as the fatty acid residue having 7 to 29 carbon atoms represented by R 6 in the general formula (1) above. From the viewpoint of improving the compatibility of the (B-3) benzoate compound with the synthetic resin and imparting further excellent weather resistance to the synthetic resin, R 23 is preferably a fatty acid residue having 10 to 26 carbon atoms, and more preferably a fatty acid residue having 12 to 22 carbon atoms. Furthermore, R 23 is preferably a residue obtained by removing a carboxyl group from a saturated fatty acid.

[0054] (B-3) The benzoate compound may contain, for example, one or more selected from the group consisting of the following Compound Nos. C1 to C5.

[0055] [Chemical formula]

[0056] When the resin additive composition of the present embodiment contains a (B-3) benzoate compound, the content Z 1 of the (B-1) hindered amine compound with respect to the content Z 3 of the (B-3) benzoate compound, the ratio Z 3 / Z 1 may be, for example, 0.05 or more and 10.0 or less in terms of mass. From the viewpoint of imparting further excellent weather resistance to the synthetic resin, Z 3 / Z 1is preferably from 0.1 to 4.0, more preferably from 0.15 to 2.5, and even more preferably from 0.2 to 1.5.

[0057] The resin additive composition of the present embodiment may further contain resin additives such as antioxidants other than phenolic antioxidants, ultraviolet absorbers, fatty acid metal salts, lubricants, hydrotalcites, fluorescent brighteners, pigments, and dyes (hereinafter referred to as "other additives (I)") as required.

[0058] In the resin additive composition of the present embodiment, it is preferable that the (B-1) hindered amine compound is adsorbed on the carrier. In this case, bleeding out of the (B-1) hindered amine compound from the resin additive composition can be suppressed. By suppressing the bleeding out of the (B-1) hindered amine compound from the resin additive composition, the blocking resistance of the resin additive composition can be made excellent, and the metering property and handleability of the resin additive composition can be improved. Here, examples of the adsorption mode include chemisorption and physical adsorption. From the viewpoint of making the blocking resistance of the resin additive composition more excellent, chemisorption is preferable among these. Further, the (B-1) hindered amine compound may be adsorbed (surface adsorption) only on the surface of the carrier or may be impregnated in the carrier. From the viewpoint of further suppressing the bleeding out of the (B-1) hindered amine compound from the resin additive composition, the (B-1) hindered amine compound is preferably impregnated in the carrier. In the present embodiment, "the (B-1) hindered amine compound is impregnated in the carrier" means that the carrier is porous and the (B-1) hindered amine compound is adsorbed in the pores on the surface of the carrier and the pores inside the carrier, and includes both a state where the liquid (B-1) hindered amine compound is adsorbed in the pores on the surface of the carrier and the pores inside the carrier, and a state where the adsorbed liquid (B-1) hindered amine compound is solidified after being adsorbed. In the resin additive composition of the present embodiment, the (B-2) phenolic antioxidant may be further adsorbed on the carrier. Further, when the resin additive composition of the present embodiment further contains the (B-3) benzoate compound or the above-mentioned other additive (I), one or more of these components may be adsorbed on the carrier.

[0059] The resin additive composition of the present embodiment is produced, for example, by a production method including a compounding step of compounding (B-1) a hindered amine compound, (B-2) a phenolic antioxidant, a carrier, and, if necessary, (B-3) a benzoate compound and the above-mentioned other additive (I) and uniformly mixing them. Here, the mixing method is not particularly limited, and for example, a known mixing device such as an FM mixer may be used for mixing. Here, in the above compounding step, for example, a method of mixing the (B-1) hindered amine compound in a liquid or molten state with the carrier under atmospheric pressure or reduced pressure, a method of mixing a solution in which the (B-1) hindered amine compound is dissolved in a solvent with the carrier and then removing the solvent, etc. may be used to adsorb the (B-1) hindered amine compound onto the carrier.

[0060] The shape of the resin additive composition of the present embodiment may be, for example, pellet shape, pill shape, or powder shape. From the viewpoint of suppressing bleeding of the (B-1) hindered amine compound from the resin additive composition, among these, pellet shape or pill shape is preferable, and pellet shape is particularly preferable.

[0061] <Resin composition>

[0062] Hereinafter, the configuration of the resin composition of the present embodiment will be described.

[0063] The resin composition of the present embodiment contains at least (A) a synthetic resin and the above resin additive composition. The resin composition of the present embodiment has excellent weather resistance.

[0064] Examples of the (A) synthetic resin include thermoplastic resins and thermosetting resins. Examples of the thermoplastic resin include crystalline resins such as polyolefin resins, polyamide resins, polyester resins, polyacetal resins, polylactic acid, polyphenylene sulfide, amorphous resins such as polycarbonate resins, styrene resins, acrylic resins, urethane resins, halogen-containing resins, petroleum resins, coumarone resins, polyvinyl alcohol, polyvinyl acetate, polyphenylene oxide, and thermoplastic elastomers. In addition, examples of the thermosetting resin include phenolic resin, urea resin, melamine resin, epoxy resin, unsaturated polyester resin, synthetic rubber, etc. (A) The synthetic resin may be included alone as one type or in combination of two or more types. Further, (A) the synthetic resin may be a copolymer or a polymer alloy.

[0065] (A) The synthetic resin is preferably a thermoplastic resin, more preferably a crystalline resin, and preferably contains a polyolefin-based resin. Examples of the polyolefin-based resin include polyethylene-based resins such as low-density polyethylene, linear low-density polyethylene, high-density polyethylene, crosslinked polyethylene, and ultra-high molecular weight polyethylene; polypropylene-based resins such as homopolypropylene, random copolymer polypropylene, block copolymer polypropylene, impact copolymer polypropylene, high-impact copolymer polypropylene, and maleic anhydride-modified polypropylene; α-olefin polymers such as polybutene-1, cycloolefin polymer, poly-3-methyl-1-butene, poly-3-methyl-1-pentene, and poly-4-methyl-1-pentene; and α-olefin copolymers such as ethylene-methyl methacrylate copolymer and ethylene-vinyl acetate copolymer. Here, the molecular weight, degree of polymerization, density, softening point, ratio of insoluble matter in a solvent, degree of stereoregularity, presence or absence of catalyst residues, types and blending ratios of monomers used as raw materials, types of catalysts used in polymerization (e.g., Ziegler catalyst, metallocene catalyst, etc.) of the polyolefin-based resin are not particularly limited and are appropriately selected. Among the polyolefin-based resins, polypropylene-based resins are particularly preferred.

[0066] In the resin composition of the present embodiment, the content of the resin additive composition may be, for example, 0.001 to 10 parts by mass with respect to 100 parts by mass of the (A) synthetic resin. From the viewpoint of making the weather resistance of the resin composition more excellent and suppressing bleeding or blooming of the components contained in the resin additive composition, the content of the resin additive composition is preferably 0.01 to 5 parts by mass, more preferably 0.05 to 3 parts by mass, and still more preferably 0.1 to 1 part by mass with respect to 100 parts by mass of the (A) synthetic resin.

[0067] The resin composition of the present embodiment may further contain, if necessary, the above-mentioned other additives (I) exemplified as components that may be contained in the resin additive composition of the present embodiment, flame retardants, flame retardant aids, fillers, antistatic agents, curing acceleration catalysts, organic solvents, anti-yellowing agents, leveling agents, defoaming agents, thickeners, anti-settling agents, anti-fogging agents, etc. resin additives (hereinafter referred to as "other additives (II)").

[0068] The manufacturing method of the resin composition of the present embodiment includes a step of blending the above resin additive composition with the (A) synthetic resin. According to the manufacturing method of the resin composition of the present embodiment, a resin composition excellent in weather resistance can be manufactured. Further, according to the manufacturing method of the resin composition of the present embodiment, as an additive to be blended with the synthetic resin, a resin additive composition excellent in antiblocking property, metering property and handleability can be used, so that a resin composition of uniform quality can be efficiently manufactured.

[0069] As an example of the manufacturing method of the above resin composition, (A) a synthetic resin, a resin additive composition, and, if necessary, the above other additives (II) are premixed using various mixers such as a tumbler or an FM mixer, and then melt-kneaded with a Banbury mixer, a roll, a Brabender, a single-screw kneading extruder, a twin-screw kneading extruder, a kneader, etc. Methods such as are mentioned. Alternatively, without pre-mixing all components or only pre-mixing some of the components, they may be supplied to an extruder using a feeder and melt-kneaded to produce a resin composition. Further, a resin composition obtained by pre-mixing some of the components, supplying them to an extruder, and melt-kneading them may be used as a masterbatch, and the resin composition may be produced again by mixing and melt-kneading it with other components. Also, the (A) synthetic resin used in the above mixing and kneading step may have a predetermined shape such as powder form, pellet form, etc., or may be fibrous.

[0070] The resin composition of the present embodiment may be solid, for example, and may have a certain shape such as powder form, granular form, pellet, briquette, tablet, or sheet. Also, the resin composition of the present embodiment may be a liquid, slurry, emulsion, or paste.

[0071] <Resin structure> The resin structure of the present embodiment is formed from the above resin composition. The resin structure of the present embodiment has excellent weather resistance. For the resin structure, it is sufficient that part or all of it is constituted by the resin composition. However, it is preferable that the entire resin structure is constituted by the resin composition. Specific examples of the resin structure include molded products obtained by molding the resin composition, coating films obtained by curing paints composed of the resin composition, etc. Among these, molded products obtained by molding the resin composition are preferable.

[0072] Here, examples of the molded article include injection molded articles, fibers, biaxially stretched films, uniaxially stretched films, non-stretched films, sheets, thermoformed articles, extrusion blow molded articles, injection blow molded articles, injection stretch blow molded articles, profile extrusion molded articles, rotational molded articles, etc. More specifically, vehicle members, household goods, food packaging materials, etc. are included. Further, examples of the coating film include, for example, metals such as galvanized steel sheets, zinc alloy plated steel sheets, stainless steel sheets, tin plated steel sheets, and coatings formed by applying a paint composed of a resin composition onto a substrate made of a resin such as polymethyl methacrylate resin, polycarbonate resin, polyester resin, polystyrene resin, ABS resin, AS resin, polyamide resin, polyarylate resin, polymethacrylimide resin, polyallyldiglycol carbonate resin, etc. by known methods such as brush coating, bar coating, spray coating, dip coating, spin coating, curtain coating, etc. to form a paint layer, and then curing this paint layer by known methods such as room temperature curing, heat curing, ultraviolet irradiation, etc.

[0073] As described above, embodiments of the present invention have been described, but these are examples of the present invention, and various configurations other than the above can be adopted. Further, the present invention is not limited to the above-described embodiments, and modifications, improvements, etc. within the range capable of achieving the object of the present invention are included in the present invention.

Example

[0074] Hereinafter, the present invention will be described in detail with reference to examples, but the present invention is not limited to the descriptions of these examples at all.

[0075] The (A) synthetic resin, (B-1) hindered amine compound, (B-2) phenolic antioxidant, carrier, filler, and pigment used in this example are as follows.

[0076] [(A) Synthetic resin] · Synthetic resin 1: Homopolypropylene (MFR (230 °C, 2.16 kg) = 10 g / 10 min) · Synthetic resin 2: Impact copolymer polypropylene (manufactured by Nippon Polypropylene Co., Ltd., Novatec PP BC03B) · Synthetic resin 3: Ethylene-1-octene copolymer elastomer (manufactured by Dow Chemical Company, Engage 8100)

[0077] [(B-1) Hindered amine compound] · B1-a: Compound No. A4 above · B1-b: Compound No. A5 above

[0078] [(B-2) Phenolic antioxidant] · B2-a: Compound No. B1 above · B2-b: Compound No. B4 above · B2-c: Compound No. B3 above · B2-d: Compound No. B5 above [Carrier] · Silica produced by the gel method (manufactured by Evonik Industries AG, trade name Carplex BS-304F) [Filler] · Talc (manufactured by Nippon Talc Co., Ltd., Micro Ace P-4) [Pigment] · Masterbatch containing black pigment (manufactured by NP Kasei Co., Ltd., OM250)

[0079] <Preparation of resin additive composition> Into an FM mixer (manufactured by Nippon Coke Co., Ltd., equipment name FM-20) with the internal temperature of the mixer set at 50°C, the (B-1) hindered amine compound and the carrier described in Table 1 were charged in the blending amounts described in Table 1, and mixed for 2 minutes under the conditions of an internal temperature of 50°C in the mixer and a rotation speed of 880 rpm to impregnate the carrier with the (B-1) hindered amine compound. Here, the (B-1) hindered amine compound was preheated to 80°C and charged into the FM mixer in a molten state. Subsequently, the internal temperature of the mixer was set at 40°C, and the (B-2) phenolic antioxidant described in Table 1 was charged into the FM mixer in the blending amount described in Table 1, and further mixed for 2 minutes under the conditions of an internal temperature of 40°C in the mixer and a rotation speed of 440 rpm. In the above manner, Resin Additive Compositions 1 to 8 were prepared. However, in Resin Additive Composition 8, the (B-2) phenolic antioxidant was not blended. In Table 1, the unit of the blending amount of each component is parts by mass.

[0080] [Table 1]

[0081] <Blocking Resistance of Resin Additive Composition> The above Resin Additive Composition 6 was gently filled as a sample into a cylindrical glass sample bottle with a bottom area of 4.08 cm 2 and a height of 6.45 cm up to a height of 1.5 cm from the bottom. After that, the sample bottle was sealed with a screw-type lid, and left standing in a constant temperature bath at 60°C for 24 hours. After 24 hours, the sample bottle was taken out of the constant temperature bath and left standing at 23°C for 24 hours. After 24 hours, the sample bottle was gently turned upside down, and dropped freely vertically once onto a table composed of an iron flat plate from a height of 3 cm above the table to impact the sample bottle. As a result, the sample did not block and adhere to the bottom side of the sample bottle, and the entire amount dropped to the lid side of the sample bottle. From this result, it was found that Resin Additive Composition 6 is excellent in blocking resistance.

[0082] (Examples 1 to 3 and Comparative Examples 1 to 2) <Preparation of Resin Composition> Synthetic Resin 1, and Resin Additive Compositions 1 to 3 and 8 were blended at the blending ratios shown in Table 2, 0.075 parts by mass of tris(2,4-di-tert-butylphenyl) phosphite was blended as an antioxidant other than the phenolic antioxidant, and 0.05 parts by mass of calcium stearate was blended as a fatty acid metal salt. Using a twin-screw extruder (manufactured by Nippon Steel Works, Ltd., TEX28V), melt-kneading was carried out under the conditions of a melting temperature of 230°C and a screw speed of 150 rpm, and after pelletizing, drying was carried out at 60°C for 8 hours to produce a pellet-shaped resin composition. In Table 2, the unit of the blending amount of each component is parts by mass.

[0083] [Table 2]

[0084] <Characteristic Evaluation> The resin compositions of Examples 1 to 3 and Comparative Examples 1 and 2 were injection molded under the conditions of a resin temperature of 230°C and a mold temperature of 40°C to produce plate-shaped test pieces with a thickness of 2 mm. These test pieces were introduced into a weather resistance tester (Xenon Weather Meter manufactured by Ametek, Atlas Ci4000), and the irradiation intensity at a wavelength of 340 nm was 0.55 W / m 2 2, continuous irradiation, black panel temperature of 89°C ± 3°C, and weather resistance tests were conducted under the condition of no rainfall. Here, the glossiness (gloss value) of each test piece before and during the weather resistance test was measured, and the time (h) from the start of the test until the glossiness of the test piece became 80% or less of the glossiness before the weather resistance test was defined as the "80% gloss retention time" and used as an index of weather resistance. Here, the glossiness of the test piece was measured using a gloss meter (manufactured by Nippon Denshoku Industries Co., Ltd., VG-2000) under the condition of a measurement angle of 60°. The results are also shown in Table 2.

[0085] (Examples 4 to 7 and Comparative Example 3) <Preparation of Resin Composition> 2 to 3 parts by mass of synthetic resin, 4 to 7 parts by mass of resin additive composition, filler and pigment were compounded at the compounding ratios shown in Table 2, 0.10 part by mass of the above compound No. B3 as a phenolic antioxidant, 0.10 part by mass of tris(2,4-di-tert-butylphenyl) phosphite as an antioxidant other than phenolic antioxidants, and 0.05 part by mass of calcium stearate as a fatty acid metal salt were compounded, and using a twin-screw extruder (manufactured by Nippon Steel Works, Ltd., TEX28V), melt kneading was carried out under the conditions of a melting temperature of 230°C and a screw speed of 150 rpm, granulated, and then dried at 60°C for 8 hours to produce a pellet-shaped resin composition. In Table 3, the unit of the compounding amount of each component is part by mass.

[0086]

Table 3

[0087] <Characteristic Evaluation> The resin compositions of Examples 4 to 7 and Comparative Example 3 were injection-molded under the conditions of a resin temperature of 230°C and a mold temperature of 40°C to produce plate-shaped test pieces with a thickness of 2 mm. These test pieces were introduced into a weather resistance tester (Xenon Weather Meter manufactured by Ametek, Atlas Ci4000), and a weather resistance test was conducted under the conditions of an irradiation intensity of 0.55 W / m 2 at a wavelength of 340 nm, a black panel temperature of 70°C ± 3°C, and with rainfall. Here, rainfall and light irradiation were set as one cycle of the following (1) to (4) (total 180 minutes), and this cycle was repeated. (1) No irradiation and with rainfall for 60 minutes (2) With irradiation and without rainfall for 40 minutes (3) With irradiation and with rainfall for 20 minutes (4) With irradiation and without rainfall for 60 minutes The glossiness (gloss value) of each test piece before and during the weather resistance test was measured, and the time (h) until the glossiness of the test piece became 80% or less of the glossiness before the weather resistance test from the start of the test was defined as the "80% gloss retention time" and used as an index of weather resistance. Here, the glossiness of the test piece was measured using a gloss meter (manufactured by Nippon Denshoku Industries Co., Ltd., VG-2000) under the condition of a measurement angle of 60°. The results are also shown in Table 3.

[0088] As shown in Table 2, the resin compositions of Examples 1 to 3 containing resin additive compositions 1 to 3 were found to be superior in weather resistance compared to the resin composition of Comparative Example 1 containing resin additive composition 8 and the resin composition of Comparative Example 2 not containing a resin additive composition. Further, as shown in Table 3, the resin compositions of Examples 4 to 7 containing resin additive compositions 4 to 7 were found to be superior in weather resistance compared to the resin composition of Comparative Example 3 not containing a resin additive composition. From the above, it was confirmed that the resin additive composition of the present invention can impart excellent weather resistance to synthetic resins.

Claims

1. (B-1) a hindered amine compound, (B-2) a phenolic antioxidant, a carrier, and a resin additive composition comprising the same.

2. The resin additive composition according to claim 1, wherein the (B-1) hindered amine compound is adsorbed on the carrier.

3. The resin additive composition according to claim 1, wherein the (B-1) hindered amine compound contains one or more compounds represented by the following general formula (1). 【Chemical 1】 (In the general formula (1) above, R １ represents a hydrogen atom or a methyl group, and R ２ to R ５ each independently represent an alkyl group having 1 to 6 carbon atoms, and R ６ represents a fatty acid residue having 7 to 29 carbon atoms.)

4. A resin composition comprising (A) a synthetic resin and the resin additive composition according to any one of claims 1 to 3.

5. A resin structure formed from the resin composition according to claim 4.

6. A method for producing a resin composition, comprising the step of blending the resin additive composition according to any one of claims 1 to 3 with (A) a synthetic resin.

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