WO2009107502A1 - 耐候性の改善された木質系合成樹脂組成物およびその成形体 - Google Patents
耐候性の改善された木質系合成樹脂組成物およびその成形体 Download PDFInfo
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- WO2009107502A1 WO2009107502A1 PCT/JP2009/052539 JP2009052539W WO2009107502A1 WO 2009107502 A1 WO2009107502 A1 WO 2009107502A1 JP 2009052539 W JP2009052539 W JP 2009052539W WO 2009107502 A1 WO2009107502 A1 WO 2009107502A1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/14—Copolymers of propene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L97/00—Compositions of lignin-containing materials
- C08L97/02—Lignocellulosic material, e.g. wood, straw or bagasse
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/3412—Heterocyclic compounds having nitrogen in the ring having one nitrogen atom in the ring
- C08K5/3432—Six-membered rings
- C08K5/3435—Piperidines
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L51/06—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
Definitions
- the present invention relates to a wood-based synthetic resin composition and a molded body thereof, and more particularly to a wood-based synthetic resin composition and a molded body thereof having a highly improved weather resistance.
- Patent Document 1 discloses a wood grain molded product coated with a transparent weather resistant resin.
- 2 discloses a wood-like material obtained by sanding or embossing the surface of a surface layer portion.
- Patent Document 3 discloses a wood powder containing an inorganic filler.
- Patent Document 4 discloses the addition of a weathering agent to the coating layer.
- Patent Document 5 discloses blending iron-based compounds such as iron hydroxide and iron sulfate in order to improve weather resistance. JP 2000-239432 A JP 2000-301670 A JP 2001-098114 A JP 2004-174721 A JP 2002-038018 A
- Patent Documents 1 and 2 have improved the weather resistance of molded products, problems such as complicated manufacturing processes and complicated mold structures have been pointed out.
- an object of the present invention is to solve the above-mentioned problems and provide a woody synthetic resin composition having excellent weather resistance and a molded product thereof.
- the wood-based synthetic resin composition of the present invention comprises 5 to 200 parts by mass of wood flour with respect to 100 parts by mass of the synthetic resin, the following general formula (1), Wherein R 1 , R 2 , R 3 and R 4 are each independently substituted with an alkyl group having 1 to 4 carbon atoms, and R is substituted with an alkyl group having 1 to 18 carbon atoms or a hydroxy group It is characterized by comprising 0.01 to 5 parts by mass of a hindered amine compound having a partial structure represented by an alkyl group or a cycloalkyl group having 5 to 8 carbon atoms.
- the woody synthetic resin composition of the present invention has a hindered amine compound having a partial structure represented by the general formula (1) represented by the following general formula (2), (Wherein R 5 represents an alkyl group having 1 to 18 carbon atoms, an alkyl group substituted with a hydroxy group, or a cycloalkyl group having 5 to 8 carbon atoms).
- the synthetic resin is preferably a polyolefin resin
- the polyolefin resin is preferably a polyethylene resin, a polypropylene resin, or an ethylene-propylene copolymer resin.
- the wood-based synthetic resin molded body of the present invention is formed by molding the wood-based synthetic resin composition, and is characterized by improved weather resistance.
- Synthetic resins used in the present invention include ⁇ -olefin polymers such as polypropylene, high density polyethylene, low density polyethylene, linear low density polyethylene, polybutene-1, poly-4-methylpentene, and ethylene-vinyl acetate copolymer.
- Polyolefins such as copolymers, ethylene-propylene copolymers and copolymers thereof, polyvinyl chloride, polyvinylidene chloride, chlorinated polyethylene, chlorinated polypropylene, polyvinylidene fluoride, chlorinated rubber, vinyl chloride-vinyl acetate copolymer, Vinyl chloride-ethylene copolymer, vinyl chloride-vinylidene chloride copolymer, vinyl chloride-vinylidene chloride-vinyl acetate terpolymer, vinyl chloride-acrylic acid ester copolymer, vinyl chloride-maleic acid ester copolymer , Vinyl chloride-cyclohexylmaleimide Halogenated resins such as coalescence, petroleum resin, coumarone resin, polystyrene, polyvinyl acetate, acrylic resin, styrene and / or ⁇ -methylstyrene and other monomers (for example, maleic anhydride, phen
- Polyamide such as linear polyester, polyphenylene oxide, polycaprolactam and polyhexamethylene adipamide, polycarbonate, branched polycarbonate, polyacetal, polyphenylene sulfide, Polyurethane, thermoplastic resins such as cellulose resins, and mixtures thereof, or can include phenolic resins, urea resins, melamine resins, epoxy resins, thermosetting resins such as unsaturated polyester resin. Further, it may be an elastomer such as isoprene rubber, butadiene rubber, acrylonitrile-butadiene copolymer rubber, styrene-butadiene copolymer rubber. Of the above synthetic resins, polyolefin resins such as polyethylene, polypropylene, and ethylene-propylene copolymer resins are preferably used as the synthetic resin composition of the present invention.
- the synthetic resin includes specific gravity, average molecular weight, melt viscosity, monomer composition, ratio of insoluble matter in solvent, presence or type of stereoregularity, shape and size at the end of polymerization, type of catalyst used for polymerization, catalyst It is used regardless of the presence / absence or method of the deactivation treatment / removal treatment of the residue, the presence / absence / type / concentration of the metal species or acid component remaining in the catalyst-derived resin.
- the kind of wood flour used in the present invention is not particularly limited as long as it is a pulverized product of plant fiber. Sugi, Tsuga, Hinoki, Pine, Katsura, Chestnut, Beech, Sakura, Oak, Fir, Lawan Etc. Wood flour can be used.
- a pulverized product is preferable, and those having a particle size of 5 to 600 ⁇ m are preferable because a good wood texture can be obtained.
- the blending amount of the wood flour is 5 to 200 parts by mass, preferably 20 to 150 parts by mass with respect to 100 parts by mass of the synthetic resin. If it is less than 5 parts by mass, good wood texture cannot be obtained, and if it exceeds 200 parts by mass, mechanical properties such as impact resistance tend to be inferior.
- Examples of the alkyl group having 1 to 4 carbon atoms represented by R 1 , R 2 , R 3 and R 4 in the hindered amine compound having a partial structure represented by the general formula (1) used in the present invention include methyl, Examples include ethyl, propyl, isopropyl, n-butyl, sec-butyl, tert-butyl and the like.
- Examples of the alkyl group having 1 to 18 carbon atoms represented by R in the general formula (1) and R 5 in the general formula (2) include methyl, ethyl, propyl, isopropyl, n-butyl, sec-butyl, Examples include tertiary butyl, pentyl, hexyl, heptyl, octyl, 2-ethylhexyl, nonyl, isononyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl and the like.
- Examples of the alkyl group substituted with a hydroxyl group include groups corresponding to the above alkyl groups such as 2-hydroxyethyl, 2-hydroxypropyl, 3-hydroxypropyl, 2-hydroxy-2-methylpropyl and the like.
- Examples of the cycloalkyl group having 5 to 8 carbon atoms represented by R in the general formula (1) and R 5 in the general formula (2) include cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl and the like.
- the hindered amine compound having a group represented by the general formula (1) the following No. Examples of the compound are 1 to 6.
- the present invention is not limited by the following compounds.
- the compound 1 is preferable because it has a particularly large weather resistance imparting effect.
- the compounding amount of the hindered amine compound represented by the general formula (1) used in the present invention is 0.01 to 5 parts by mass, preferably 0.05 to 3.5 parts by mass with respect to 100 parts by mass of the synthetic resin. In view of cost, it is more preferably 0.1 to 1 part by mass.
- the amount of the hindered amine compound is less than 0.01 parts by mass, the initial stabilizing effect is not sufficient.
- the amount is more than 5 parts by mass, the appearance of the resin composition is impaired by bloom, and the stabilizing effect is hardly improved.
- the woody synthetic resin composition of the present invention preferably contains a compatibilizing agent for the purpose of improving the compatibility in mixing the synthetic resin and the wood flour.
- the compatibilizing agent include a maleic acid-modified polypropylene resin, and examples thereof include a resin obtained by modifying a polyolefin of a maleic anhydride-modified polypropylene resin with an unsaturated carboxylic acid.
- the content of the compatibilizing agent is preferably 0.1 to 10% by mass, more preferably 1 to 5% by mass as the content in the woody synthetic resin composition. If it is less than 0.1% by mass, the effect of compatibilization may not be obtained. On the other hand, if it exceeds 10% by mass, mechanical properties such as bending strength of the molded article may be lowered, which is not preferable.
- a phenolic antioxidant if necessary, a phenolic antioxidant, a phosphorus antioxidant, a sulfur antioxidant, an ultraviolet absorber, other hindered amine compounds, a nucleating agent, a flame retardant, Additives such as flame retardant aids, processability improvers such as ethylenebisstearic acid amide and erucic acid amide, pigments, fillers, plasticizers, metal soaps, hydrotalcites, antistatic agents can be used in combination .
- phenolic antioxidant examples include 2,6-ditertiarybutyl-p-cresol, 2,6-diphenyl-4-octadecyloxyphenol, stearyl (3,5-ditertiarybutyl-4- Hydroxyphenyl) propionate, distearyl (3,5-ditertiarybutyl-4-hydroxybenzyl) phosphonate, tridecyl 3,5-ditertiarybutyl-4-hydroxybenzylthioacetate, thiodiethylenebis [(3,5 -Di-tert-butyl-4-hydroxyphenyl) propionate], 4,4'-thiobis (6-tert-butyl-m-cresol), 2-octylthio-4,6-di (3,5-di-tert-butyl) -4-hydroxyphenoxy) -s-triazine, 2,2'-methylenebis (4-methyl-6-tert-butylphenol), bis [3,3 Bis (4-hydroxy-3-
- Examples of the phosphorus antioxidant include triphenyl phosphite, tris (2,4-di-tert-butylphenyl) phosphite, tris (2,5-di-tert-butylphenyl) phosphite, and tris (nonylphenyl).
- Phosphite tris (dinonylphenyl) phosphite, tris (mono, di-mixed nonylphenyl) phosphite, diphenyl acid phosphite, 2,2'-methylenebis (4,6-ditertiarybutylphenyl) octyl phosphite , Diphenyldecyl phosphite, diphenyloctyl phosphite, di (nonylphenyl) pentaerythritol diphosphite, phenyl diisodecyl phosphite, tributyl phosphite, tris (2-ethylhexyl) phosphite, tridecyl phosphite, trilauryl phosphat , Dibutyl acid phosphite, dilauryl acid phosphite, trilauryl trithi
- sulfur-based antioxidant examples include dialkylthiodipropionates such as dilauryl, dimyristyl, myristyl stearyl, and distearyl esters of thiodipropionic acid, and polyols such as pentaerythritol tetra ( ⁇ -dodecyl mercaptopropionate).
- ⁇ -alkyl mercaptopropionic acid esters are included, and the blending amount is preferably 0.001 to 10 parts by mass, more preferably 0.05 to 5 parts by mass with respect to 100 parts by mass of the synthetic resin.
- ultraviolet absorber examples include 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-octoxybenzophenone, and 5,5′-methylenebis (2-hydroxy-4-methoxybenzophenone).
- 2-Hydroxybenzophenones such as 2- (2′-hydroxy-5′-methylphenyl) benzotriazole, 2- (2′-hydroxy-3 ′, 5′-ditert-butylphenyl) -5-chloro Benzotriazole, 2- (2′-hydroxy-3′-tert-butyl-5′-methylphenyl) -5-chlorobenzotriazole, 2- (2′-hydroxy-5′-tert-octylphenyl) benzotriazole, 2- (2′-hydroxy-3 ′, 5′-dicumylphenyl) benzotriazole, 2 2- (2′-hydroxyphenyl) benzotriazoles such as (2′-hydroxy-3′-tert-butyl-5′-carboxyphenyl) benzotriazole; phenyl salicylate, resorcinol monobenzoate, 2,4-di-tertiary Benzoates such as butylphenyl-3,5-ditertiarybutyl-4
- Examples of the other hindered amine compounds include 2,2,6,6-tetramethyl-4-piperidyl stearate, 1,2,2,6,6-pentamethyl-4-piperidyl stearate, and 2,2,6. , 6-tetramethyl-4-piperidylbenzoate, bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate, bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, Tetrakis (2,2,6,6-tetramethyl-4-piperidylbutanetetracarboxylate, tetrakis (1,2,2,6,6-pentamethyl-4-piperidylbutanetetracarboxylate, bis (2,2,6 , 6-Tetramethyl-4-piperidyl) ⁇ di (tridecyl) -1,2,3,4-butanetetracarboxylate, bis (1,2 2,6,6-pentamethyl-4-piperidyl) -di (tride
- nucleating agent examples include aromatic carboxylic acid metal salts such as aluminum pt-butylbenzoate and sodium benzoate; sodium bis (2,4-ditert-butylphenyl) phosphate, bis (2,4- Acid phosphate metal salts such as ditertiarybutylphenyl) lithium phosphate and sodium-2,2′-methylenebis (4,6-ditertiarybutylphenyl) phosphate; dibenzylidene sorbitol, bis (methylbenzylidene) sorbitol, etc.
- the blending amount is preferably 0.001 to 10 parts by mass, more preferably 0.01 to 5 parts by mass with respect to 100 parts by mass of the resin.
- the flame retardant examples include halogen flame retardants such as tetrabromobisphenol A and decabromodiphenyl ether; inorganic phosphorus compounds such as red phosphorus and melamine phosphate, triphenyl phosphate, resorcinol / phenol / phosphate condensate, bisphenol A / Phosphorus flame retardants comprising phosphoric acid ester compounds such as 2,6-xylenol / phosphoric acid condensates; inorganic flame retardants such as magnesium hydroxide and aluminum hydroxide; nitrogen-containing compounds such as melamine cyanurate, etc.
- halogen flame retardants such as tetrabromobisphenol A and decabromodiphenyl ether
- inorganic phosphorus compounds such as red phosphorus and melamine phosphate, triphenyl phosphate, resorcinol / phenol / phosphate condensate, bisphenol A / Phosphorus flame
- a flame retardant aid such as antimony or an anti-drip agent such as fluorine resin or silicone resin.
- the blending amount is preferably 0.1 to 200 parts by mass, more preferably 1 to 100 parts by mass with respect to 100 parts by mass of the resin.
- the pigment may be organic or inorganic, white pigments such as titanium oxide and zinc sulfide; black pigments such as carbon black; chromium oxide, chrome green, zinc green, copper chloride phthalocyanine green, phthalocyanine green, naphthol green, malachite Green pigments such as green lakes; blue pigments such as ultramarine, bitumen, copper phthalocyanine blue, cobalt blue, phthalocyanine blue, phossky sky blue, and indanthrene blue; red lead, bengara, basic zinc chromate, chrome vermilion vermilion Red pigments such as cadmium red, rose red, brilliant carmine, brilliant scarlet, quinacridone red, risor red, vermilion, thioindigo red, mingamiya red; yellow lead, zinc yellow, yellow iron oxide, titanium yellow -Yellow pigments such as First Yellow, Hansa Yellow, Auramin Lake, Benzidine Yellow, Indanthrene Yellow and the like.
- the filler glass fiber, talc, silica, calcium carbonate or the like is used.
- the filler is preferably surface-treated with a surface treatment agent such as titanium or silane in order to improve the affinity with the resin.
- the blending amount is preferably 5 to 200 parts by mass, more preferably 10 to 100 parts by mass with respect to 100 parts by mass of the synthetic resin.
- metal soap there are used metals such as magnesium, calcium, aluminum and zinc and salts of saturated or unsaturated fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid and oleic acid.
- Moisture content, melting point, particle size, fatty acid composition, production method is a metathesis method by reaction of fatty acid salt of alkali metal and metal (hydroxide) or in the presence or absence of solvent of fatty acid and metal (water) oxide Regardless of whether it is a direct method in which the neutralization reaction is carried out below, it is used even if either fatty acid or metal is in excess.
- the blending amount is preferably 0.001 to 10 parts by mass, more preferably 0.01 to 5 parts by mass with respect to 100 parts by mass of the synthetic resin.
- the hydrotalcite may be a natural product or a synthetic product, and may be one modified with an alkali metal such as lithium or one having a part of carbonate anion substituted with perchloric acid.
- an alkali metal such as lithium or one having a part of carbonate anion substituted with perchloric acid.
- the following general formula (3) ZnxMgyAl 2 (OH) 2 (x + y + 2) CO 3 .nH 2 O (3) (Wherein x represents 0 to 3, y represents 1 to 6, x + y represents 4 to 6, and n represents 0 to 10). It can be used with or without surface treatment.
- the particle size is not particularly limited, but it is desirable that the particle size is small as long as the characteristics as hydrotalcite are not lost.
- the blending amount is preferably 0.001 to 10 parts by mass, more preferably 0.005 to 5 parts by mass with respect to 100 parts by mass of the synthetic resin.
- ester plasticizers include dibasic acids such as phthalic acid, naphthalene dicarboxylic acid, succinic acid, glutaric acid, adipic acid and maleic acid, and alkyl alcohols such as octanol, isononyl alcohol, lauryl alcohol and stearyl alcohol, and diethylene glycol.
- alkyl alcohols such as octanol, isononyl alcohol, lauryl alcohol and stearyl alcohol, and diethylene glycol.
- diester compounds such as ether alcohols such as monobutyl ether.
- polyester plasticizers include polyesters composed of the above dibasic acids and glycols such as ethylene glycol, propylene glycol, butanediol, neopentyl glycol, and hexanediol, and the terminal of the above monoalcohols, propionic acid, octylic acid, benzoic acid, etc.
- Polyesters sealed with a monocarboxylic acid compound of the above, polyether polyethers such as polyethylene glycol and polypropylene glycol are used as polyether plasticizers, and polyethers such as polyethylene glycol and polypropylene glycol are used as polyether plasticizers.
- the above dibasic acid polyesters may be mentioned, and the blending amount is preferably 0 to 20 parts by mass, more preferably 1 to 15 parts by mass with respect to 100 parts by mass of the resin.
- the antistatic agent examples include cationic antistatic agents such as fatty acid quaternary ammonium ion salts and polyamine quaternary salts; higher alcohol phosphate esters, higher alcohol EO adducts, polyethylene glycol fatty acid esters, anionic type Anionic antistatic agents such as alkyl sulfonates, higher alcohol sulfates, higher alcohol ethylene oxide adduct sulfates, higher alcohol ethylene oxide adduct phosphates; polyhydric alcohol fatty acid esters, polyglycol phosphates, poly Nonionic antistatic agents such as oxyethylene alkyl allyl ether; amphoteric antistatic agents such as amphoteric alkylbetaines such as alkyldimethylaminoacetic acid betaine and imidazoline type amphoteric activators.
- Such an antistatic agent may be used alone, or two or more kinds of antistatic agents may be used in combination.
- the blending amount is preferably 0.001 to 10
- the woody synthetic resin composition of the present invention can be extruded by adding a foaming agent, and a pyrolytic foaming agent can be suitably used as the foaming agent, and an inorganic heat treatment such as sodium bicarbonate or ammonium carbonate can be used.
- a foaming agent e.g., a pyrolytic foaming agent
- an inorganic heat treatment such as sodium bicarbonate or ammonium carbonate
- Decomposable foaming agents, organic pyrolytic foaming agents such as azodicarbonamide (ADCA), and mixtures thereof can be used.
- each compound is separately added to the resin, mixed with a Henschel mixer and then supplied to the processing machine, and any combination of compounds other than the resin as a mixture in advance
- a method of adding powder or granules into a resin a method of adding a master pellet by blending at a high concentration in the resin, a method of adding to a resin, and an extruder having a plurality of supply ports.
- a known addition method such as a method of adding to the resin from the supply port is used.
- the molding method of the wood-based synthetic resin composition is not particularly limited, and is molded by known means such as extrusion molding, injection molding, compression molding, and lamination molding depending on the resin used, the presence or absence of a filler, and the like.
- woody synthetic resin composition molded body of the present invention is not particularly limited, but it is suitably used for building materials, automotive interior applications, etc., and for building materials, such as outdoor fences, lattices, floor materials (balconies, decks), etc. It is used for interior materials such as exterior members, inner wall materials, ceiling materials, stair railings, furniture materials, etc., as well as playground equipment, promenades, etc.
- the weather resistance of the test specimen was determined by using a sunshine weather meter (manufactured by Suga Test Instruments Co., Ltd.) at a black panel temperature of 83 ° C. and rain (ion-exchanged water for 18 minutes / 120 dispersed water). The gloss residual ratio (%) and the color difference ( ⁇ E) were evaluated. The results are also shown in Table 1.
- the gloss was measured with a gloss meter, model TC-108D, manufactured by Tokyo Denshoku Co., Ltd. (no unit).
- a woody synthetic resin composition having excellent weather resistance and a molded product thereof can be provided.
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Abstract
Description
(式中、R1、R2、R3およびR4は、各々独立に、炭素原子数1~4のアルキル基を、Rは炭素原子数1~18のアルキル基、ヒドロキシ基で置換されたアルキル基または炭素原子数5~8のシクロアルキル基を表す)で表される部分構造を有するヒンダードアミン化合物0.01~5質量部を配合してなることを特徴とするものである。
(式中、R5は炭素原子数1~18のアルキル基、ヒドロキシ基で置換されたアルキル基または炭素原子数5~8のシクロアルキル基を表す)で表される化合物であることが好ましい。
本発明に用いられる合成樹脂としては、ポリプロピレン、高密度ポリエチレン、低密度ポリエチレン、直鎖低密度ポリエチレン、ポリブテン-1、ポリ-4-メチルペンテン等のα-オレフィン重合体またはエチレン-酢酸ビニル共重合体、エチレン-プロピレン共重合体などのポリオレフィンおよびこれらの共重合体、ポリ塩化ビニル、ポリ塩化ビニリデン、塩素化ポリエチレン、塩素化ポリプロピレン、ポリフッ化ビニリデン、塩化ゴム、塩化ビニル-酢酸ビニル共重合体、塩化ビニル-エチレン共重合体、塩化ビニル-塩化ビニリデン共重合体、塩化ビニル-塩化ビニリデン-酢酸ビニル三元共重合体、塩化ビニル-アクリル酸エステル共重合体、塩化ビニル-マレイン酸エステル共重合体、塩化ビニル-シクロヘキシルマレイミド共重合体等の含ハロゲン樹脂、石油樹脂、クマロン樹脂、ポリスチレン、ポリ酢酸ビニル、アクリル樹脂、スチレン及び/又はα-メチルスチレンと他の単量体(例えば、無水マレイン酸、フェニルマレイミド、メタクリル酸メチル、ブタジエン、アクリロニトリル等)との共重合体(例えば、AS樹脂、ABS樹脂、MBS樹脂、耐熱ABS樹脂等)、ポリメチルメタクリレート、ポリビニルアルコール、ポリビニルホルマール、ポリビニルブチラール、ポリエチレンテレフタレート及びポリテトラメチレンテレフタレート等の直鎖ポリエステル、ポリフェニレンオキサイド、ポリカプロラクタム及びポリヘキサメチレンアジパミド等のポリアミド、ポリカーボネート、分岐ポリカーボネート、ポリアセタール、ポリフェニレンサルファイド、ポリウレタン、繊維素系樹脂等の熱可塑性樹脂、及びこれらの混合物、又は、フェノール樹脂、ユリア樹脂、メラミン樹脂、エポキシ樹脂、不飽和ポリエステル樹脂等の熱硬化性樹脂を挙げることができる。さらに、イソプレンゴム、ブタジエンゴム、アクリロニトリル-ブタジエン共重合ゴム、スチレン-ブタジエン共重合ゴム等のエラストマーであってもよい。上記合成樹脂のうち、ポリエチレン、ポリプロピレン、エチレン―プロピレン共重合樹脂などのポリオレフィン系樹脂を本発明の合成樹脂組成物とすることが好ましい。
ZnxMgyAl2(OH)2(x+y+2)CO3・nH2O (3)
(式中、xは0~3を示し、yは1~6を示し、また、x+yは4~6を示し、nは0~10を示す)で示される組成のものが好ましく、結晶水の有無や表面処理の有無によらず用いることができる。また、粒径は特に限定されるものではないが、ハイドロタルサイトとしての特性を失わない範囲で小さいことが望ましい。粒径が大きいと分散性が低下して安定化効果が小さくなり、さらに、得られる樹脂組成物の機械的強度や透明性などの物性を低下させることになる。配合量は合成樹脂100質量部に対して、好ましくは0.001~10質量部、より好ましくは0.005~5質量部である。
エチレン-プロピレン共重合樹脂(MFR=25、密度=0.90g/cm3、曲げ弾性率1700MPa)45質量部、木粉(三共精粉(株)製、エコミルズ スーパーフィーダー#100)55質量部、無水マレイン酸変性ポリプロピレン(三洋化成工業(株)製、ユーメックス1010)5.0質量部、テトラキス[メチレン-3-(3,5-ジ第3ブチル-4-ヒドロキシフェニル)プロピオネート]メタン0.1質量部、トリス(2,4-ジ第3ブチルフェニル)ホスファイト0.1質量部、カルシウムステアレート0.05質量部および表1記載の光安定剤(ヒンダードアミン化合物(HALS)、紫外線吸収剤:表1における配合量の単位は質量部である)をドライブレンドした後、二軸押出機190℃で造粒後、180℃でプレス成形して厚さ2mmの試験片を得た。
*2:化合物No.3は、上記化合物No.3である。
*3:比較化合物1は、下記比較化合物1(NH型HALS)である。
*4:比較化合物2は、下記比較化合物2(N-Me型HALS)である。
*5:紫外線吸収剤は、下記化合物No.7(ベンゾトリアゾール系紫外線吸収剤)である。
Claims (5)
- 前記合成樹脂が、ポリオレフィン系樹脂である請求項1に記載の木質系合成樹脂組成物。
- 前記ポリオレフィン系樹脂が、ポリエチレン樹脂、ポリプロピレン樹脂またはエチレン―プロピレン共重合樹脂である請求項3に記載の木質系合成樹脂組成物。
- 請求項1に記載の木質系合成樹脂組成物を成形してなり、耐候性の改善されたことを特徴とする木質系合成樹脂成形体。
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CN200980106676.6A CN101959962B (zh) | 2008-02-29 | 2009-02-16 | 耐候性得到改善的木质系合成树脂组合物及其成形体 |
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WO2019087982A1 (ja) * | 2017-10-31 | 2019-05-09 | 株式会社ユポ・コーポレーション | 樹脂組成物及び樹脂シート |
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