JP4759918B2 - Resin composition and molded article comprising the same - Google Patents

Description

The present invention relates to a resin composition excellent in heat resistance and mechanical properties, and a molded article comprising the same, comprising a biodegradable resin excluding polylactic acid resin and paper powder satisfying specific requirements.

  Plastic materials are widely used in various applications such as automobile parts, electrical / electronic parts, and various industrial materials, and are now indispensable materials. On the other hand, in recent years, from the viewpoint of environmental protection such as the problem of depletion of fossil resources such as petroleum, which is the raw material of plastic materials, and the problem of disposal of plastic materials, the natural environment is affected by the action of microorganisms present in the soil and water. The biodegradable resins that are decomposed below are attracting attention, and various biodegradable resins have been developed. Of these, as a biodegradable resin that can be melt-molded, for example, polyethylene comprising an aliphatic dicarboxylic acid component such as polyhydroxybutyrate, polycaprolactone, succinic acid or adipic acid and a glycol component such as ethylene glycol or butanediol Aliphatic polyesters such as succinate and polybutylene adipate, and cellulose acetate are known.

  However, when the biodegradable resin is actually used for various applications, there is a problem that heat resistance and mechanical properties are insufficient, and the biodegradable resin can be used only for specific applications.

  As a method for improving this problem, a method of using an inorganic filler such as glass fiber has been studied. However, since it is necessary to add a large amount, the specific gravity of the molded product increases, incineration or There were problems such as an increase in residue when discarded.

  Therefore, from the viewpoint of protecting the global environment, many attempts have been made to use naturally-derived organic materials such as wood powder, paper powder, bamboo powder, and kenaf as resin fillers. The proposal which mix | blends these organic fillers is made | formed (for example, refer patent documents 1-3).

  However, according to the inventions described in Patent Documents 1 and 2, although it is described that the mechanical properties or heat resistance is slightly improved, an appropriate filler has not been selected and is still insufficient for practical use. Therefore, further improvement is strongly desired.

  In addition, according to the inventions described in Patent Documents 1 and 3, it is mentioned that dioxin generation during incineration can be suppressed by reducing the chlorine content of paper or pulp as much as possible, but only reducing the chlorine content. However, the heat resistance is still insufficient practically, and further improvement is strongly desired.

The resin composition obtained by solving the above various problems can be used for various applications, for example, automobile parts, electrical / electronic parts, building materials, civil engineering materials, furniture members, game machine materials, Since it can be set as a useful article as various daily necessities, it is strongly desired to solve the above problems.
Japanese Unexamined Patent Publication No. 2000-6142 (page 2-5) JP 2000-129143 A (page 2-4) JP 2003-73988 A (page 2-4)

  The present invention has been achieved as a result of studying the solution of the problems in the prior art described above as an issue.

  Therefore, an object of the present invention is to provide a resin composition excellent in heat resistance and mechanical properties and a molded product comprising the same.

As a result of intensive studies to solve the above problems, the present inventors have found that a resin composition comprising a biodegradable resin excluding polylactic acid resin and paper powder satisfying specific requirements meets the above-mentioned purpose. The present invention has been found out to exhibit excellent characteristics.

That is, the present invention
(1) Biodegradable excluding polylactic acid resin resins and chlorine content 150ppm or more, 1000 ppm or less, sulfur content 200ppm or more and rather multi than the amount of the amount of aluminum calcium, ash content 8% by weight or more A resin composition obtained by blending a paper powder,
(2) The resin composition according to (1), wherein the sulfur content of the paper powder is 2000 ppm or less,
(3) The resin composition according to claim 1 or 2, wherein 10 to 150 parts by weight of the paper powder is blended with 100 parts by weight of the biodegradable resin excluding the polylactic acid resin .
(4) A molded product comprising the resin composition according to any one of (1) to (3).

The resin composition of the present invention, biodegradable resin and the chlorine content excluding polylactic acid resin is 150ppm or more, 1000 ppm or less, sulfur content is rather multi than the amount of calcium in the amount of 200ppm or more and aluminum, ash content It is a resin composition comprising 8% by weight or more of paper powder, and is excellent in heat resistance and mechanical properties. In addition, a molded article made of this resin composition can be used for various applications such as automobile parts, electrical / electronic parts, building materials, civil engineering materials, furniture members, materials for game machines, various daily necessities, taking advantage of the above characteristics. .

  Hereinafter, the present invention will be described in detail.

  As the biodegradable resin of the present invention, any resin can be used as long as it is a resin that can be decomposed into a low-molecular compound by the involvement of microorganisms in nature. However, polylactic acid resin is excluded.

  Specific examples of biodegradable resins excluding polylactic acid resins include polyhydroxybutyrate, polyhydroxybutyrate / valerate, microbial biodegradable resins such as bacterial cellulose, pullulan, curdlan, polyamino acid, polycaprolactone, polyethylene Succinates, polybutylene succinates, aliphatic polyesters such as polybutylene succinate / adipate and polyglycolic acid, aromatic aliphatic polyesters such as polybutylene adipate / terephthalate and polyethylene succinate / terephthalate, polyethylene carbonate, polyvinyl alcohol, polyester Chemical synthetic biodegradable resins such as amides, natural biodegradable resins such as chitin, chitosan and cellulose acetate, and composite biodegradable resins blended with starch Etc., and the like. Among them, microbial biodegradable resins and chemically synthesized biodegradable resins are preferable from the viewpoint of mechanical properties and processability, and polyhydroxybutyrate, polyhydroxybutyrate / valerate, polyamino acid, polycaprolactone, polyethylene succinate. More preferred are aromatic aliphatic polyesters such as polybutylene succinate, polybutylene succinate / adipate, polyglycolic acid, polybutylene adipate / terephthalate and polyethylene succinate / terephthalate, polyethylene carbonate, polyvinyl alcohol, polyester amide, and cellulose acetate. , Polyhydroxybutyrate, polyhydroxybutyrate / valerate, polycaprolactone, polyethylene succinate, polybutylene succinate, polybutylene sac Sulfonate / adipate, polyglycolic acid, polybutylene adipate / terephthalate and aromatic aliphatic polyesters such as polyethylene succinate / terephthalate, polyethylene carbonate is more preferred.

  The molecular weight and molecular weight distribution of the biodegradable resin are not particularly limited as long as they can be substantially molded, but the weight average molecular weight is usually 10,000 or more, preferably 20,000 or more, and further 4 It is desirable to be 10,000 or more. The weight average molecular weight here refers to the molecular weight in terms of polymethyl methacrylate (PMMA) measured by gel permeation chromatography.

  A modified biodegradable resin may be used. For example, use of a biodegradable resin modified with maleic anhydride, epoxy or amine is preferred because it tends to improve mechanical properties.

  The manufacturing method of biodegradable resin except polylactic acid resin is not specifically limited, A well-known method can be used and any methods, such as a fermentation method and a chemical synthesis method, may be sufficient.

Any paper powder can be used as long as it satisfies the requirements defined in the present invention.

Paper dust, from the point of view of protection and resource conservation of the global environment, may be used to recycle the old paper of any waste.

  Waste paper is newspaper, magazine, other recycled pulp, or paperboard such as corrugated cardboard, cardboard, paper tube, etc., as long as it is processed from plant fiber, any of which can be used. From the viewpoint that the improvement effect of the property and mechanical properties is likely to be high, and pulverized products of paperboard such as corrugated cardboard, cardboard, and paper tube are preferable. Among them, pulverized products of paperboard such as cardboard, cardboard, and paper tube are more preferable. .

As the paper powder, pulp is preferably used as a raw material, a chemical generally used as a raw material for papermaking is blended, formed into a sheet by paper making, and then pulverized. As the pulp, any of mechanical pulp, semi-chemical pulp, chemical pulp and the like may be used. However, mechanical pulp is likely to have a high effect of improving heat resistance and mechanical properties and is less likely to generate dioxins. Is preferred. In addition, as pulp, not only wood pulp, but also non-wood such as kenaf, bagasse, bamboo, flax, hemp, manila hemp, jute, kozo, mitsumata, ganpi, straw, cotton, etc. Either pulp or waste paper pulp may be used.

  Examples of chemicals commonly used as a raw material for papermaking include sizing agents such as rosin, alkyl ketene dimer, and alkenyl succinic anhydride, paper strength enhancers such as polyacrylamide and starch, polyethylene Yield improvers such as imines, polymer flocculants, drainage improvers, deinking agents such as nonionic surfactants, slime control agents such as organic halogens, pitch control agents such as organic or enzyme-based, Organic substances such as bleaching agents such as hydrogen oxide, ozone, oxygen, chlorine dioxide and sodium hypochlorite, cleaning agents, antifoaming agents, pigment dispersants and lubricants, aluminum sulfate used as a fixing agent for sizing agents, poly Aluminum chloride, and other sodium hydroxide, magnesium hydroxide, and sodium sulfate used as raw materials for papermaking , Sodium silicate, aluminum chloride, may comprise an inorganic material such as chlorine sodium preferred.

Although it does not specifically limit as paper powder, It is preferable that an adhesive agent is included from the point that the heat resistance and the improvement effect of a mechanical characteristic tend to become high. The adhesive is not particularly limited as long as it is usually used when processing paper. Emulsion adhesives such as vinyl acetate resin emulsions and acrylic resin emulsions, polyvinyl alcohol adhesives, Examples include cellulose-based adhesives, natural rubber-based adhesives, starch paste, and hot-melt adhesives such as ethylene-vinyl acetate copolymer resin-based adhesives and polyamide-based adhesives. Emulsion-based adhesives, polyvinyl alcohol-based adhesives An adhesive and a hot melt adhesive are preferable, and an emulsion adhesive and a polyvinyl alcohol adhesive are more preferable. These adhesives are also used as binders for paper processing agents. Adhesives include clay, talc, kaolinite, montmorillonite, mica, synthetic mica, zeolite, silica, graphite, carbon black, magnesium oxide, calcium oxide, titanium oxide, calcium sulfide, magnesium carbonate, calcium carbonate, and barium carbonate. Inorganic fillers such as barium sulfate, aluminum oxide and neodymium oxide are preferably contained, and clay, talc, kaolinite, montmorillonite, synthetic mica and silica are more preferable.
The paper powder used in the present invention contains various elements as a result of various components and inherent processing.

The paper dust of the present invention is required to have a chlorine content of 150 ppm or more and 1000 ppm or less, preferably 800 ppm or less, more preferably 600 ppm or less, still more preferably 400 ppm or less, particularly preferably. Is 300 ppm or less. When the chlorine content exceeds 1000 ppm, the effect of improving heat resistance and mechanical properties tends to be reduced. Furthermore, when a resin composition using a paper powder having a chlorine content exceeding 1000 ppm and a molded product comprising the same are incinerated and discarded, dioxins tend to be easily generated. The lower limit of the chlorine content, in that tends to improve heat resistance and mechanical properties state, and are more 150 ppm, is more preferably at least 170 ppm, more preferably not less than 180 ppm. For the measurement of the chlorine content, any known method can be used, but in the present invention, it is a value measured using a coulometric titration method.

The paper powder of the present invention needs to have a sulfur content of 200 ppm or more, preferably 300 ppm or more, more preferably 500 ppm or more, still more preferably 700 ppm or more, and particularly preferably 1000 ppm or more. is there. If the sulfur content is less than 200 ppm, the effect of improving heat resistance and mechanical properties tends to be reduced. The upper limit of the sulfur content is not particularly limited, but is preferably 2000 ppm or less, more preferably 1800 ppm or less, and even more preferably 1500 ppm or less, from the viewpoint that the heat resistance and the mechanical property improving effect tend to be large. For the measurement of the sulfur content, any known method can be used. In the present invention, the sulfur content is a value measured using an ultraviolet fluorescence method.

The paper powder contains aluminum and calcium, and the amount of aluminum needs to be larger than the amount of calcium. From the viewpoint of heat resistance, it preferably contains silicon, and each of aluminum and silicon More preferably, the amount of is greater than the amount of calcium.

The abundance ratio of aluminum, silicon, and calcium may be any as long as it satisfies the requirements stipulated in the present invention. For example, when the total number of the above elements is 100, aluminum is 10 to 60%, silicon Is 10 to 90%, calcium is preferably 1 to 30%, aluminum is 20 to 50%, silicon is 15 to 80%, calcium is more preferably 1 to 25%, and aluminum is 30 to 50%. %, Silicon is 20 to 70%, and calcium is more preferably 3 to 20%. These elemental analysis, single paper dust, can be measured using any of the ash content of paper dust, in the present invention and that measured using the ash. Elemental analysis is measured by using an apparatus combining X-ray fluorescence analysis, atomic absorption spectrometry, scanning electron microscope (SEM) or transmission electron microscope (TEM) and energy dispersive X-ray microanalyzer (XMA). However, in the present invention, it is a value measured using fluorescent X-ray analysis.

Paper dust having the composition as described above can be obtained by appropriately adjusting the type and amount of chemicals and other treatment agents used in the production process, or from those that are distributed in the market. It is also possible to select paper dust having a proper composition.

In the present invention, the ash content of paper powder is not particularly limited, from the viewpoint heat resistance and mechanical properties improvement is in the high prone tendency is 8 wt% or more. If it is less than 8 % by weight, the effect of improving heat resistance and mechanical properties tends to be small. The upper limit is not particularly limited, but is preferably 60% by weight or less, and more preferably 30% by weight or less. Here, the ash content is a ratio of the weight of the remaining ash content when the paper powder is baked at 450 ° C. or higher for 8 hours using an electric furnace or the like to the weight of the paper powder before baking.
Paper powder that has been surface-treated may be used. By using paper powder that has been surface-treated by various known methods such as alkali treatment, heat treatment, acetylation treatment, cyanoethylation treatment, silane coupling treatment, and gliogizar treatment. The heat resistance and mechanical properties tend to be improved, which is preferable.

In the present invention, the amount of paper powder that satisfies the requirements stipulated in the present invention is not particularly limited, but from the viewpoint of improving heat resistance and mechanical properties, it is 1 per 100 parts by weight of biodegradable resin. It is preferably ˜350 parts by weight, more preferably 1 to 300 parts by weight, further preferably 5 to 200 parts by weight, particularly preferably 10 to 150 parts by weight, and most preferably 15 to 100 parts by weight. If the blending amount of the paper powder is less than 1 part by weight, the heat resistance and mechanical property improving effect of the biodegradable resin tends to be small, and if it exceeds 350 parts by weight, the paper powder is contained in the biodegradable resin. It tends to be difficult to disperse uniformly, and the mechanical properties and surface appearance tend to deteriorate.

In the present invention, a crystallization accelerator, a thermoplastic resin other than a biodegradable resin, a filler other than paper powder that satisfies the requirements stipulated in the present invention, a stabilizer, and a mold release, as long as the effects of the present invention are not impaired. Agent, carboxyl group reactive end-capping agent, foaming agent, flame retardant, antistatic agent, lubricant, sliding property improving agent (graphite, fluororesin, etc.), antibacterial agent, colorant including pigment and dye, thermosetting resin One or more other components usually added to a resin composition such as a phenol resin, a melamine resin, a polyester resin, or a silicone resin can be added.

  In the present invention, it is preferable to blend a crystallization accelerator in that a resin composition and a molded product excellent in heat resistance and mechanical properties are easily obtained.

  The crystallization accelerator used in the present invention can be selected from a wide variety of compounds, but the crystal nucleating agent that promotes the formation of crystal nuclei of the polymer, or the softening of the polymer to facilitate movement and promote crystal growth. A plasticizer can be preferably used.

  The blending amount of the crystallization accelerator used in the present invention is preferably 50 to 0.01 parts by weight and more preferably 30 to 0.05 parts by weight with respect to 100 parts by weight of the biodegradable resin. preferable.

  As the crystal nucleating agent used as a crystallization accelerator in the present invention, those generally used as a polymer crystal nucleating agent can be used without any particular limitation, and both inorganic crystal nucleating agents and organic crystal nucleating agents can be used. Can be used.

  Specific examples of inorganic crystal nucleating agents include talc, kaolin, montmorillonite, synthetic mica, clay, zeolite, silica, graphite, carbon black, zinc oxide, magnesium oxide, titanium oxide, calcium sulfide, boron nitride, calcium carbonate, sulfuric acid Examples thereof include metal salts of barium, aluminum oxide, neodymium oxide and phenylphosphonate. These inorganic crystal nucleating agents are preferably modified with an organic substance in order to enhance dispersibility in the composition.

  Specific examples of organic crystal nucleating agents include sodium benzoate, potassium benzoate, lithium benzoate, calcium benzoate, magnesium benzoate, barium benzoate, lithium terephthalate, sodium terephthalate, potassium terephthalate, calcium oxalate , Sodium laurate, potassium laurate, sodium myristate, potassium myristate, calcium myristate, sodium octacosanoate, calcium octacosanoate, sodium stearate, potassium stearate, lithium stearate, calcium stearate, magnesium stearate, stearic acid Barium, sodium montanate, calcium montanate, sodium toluate, sodium salicylate, potassium salicylate, zinc salicylate, aluminum Minium dibenzoate, potassium dibenzoate, lithium dibenzoate, organic carboxylic acid metal salts such as sodium β-naphthalate, sodium cyclohexanecarboxylate, organic sulfonates such as sodium p-toluenesulfonate, sodium sulfoisophthalate, stearamide , Ethylene bislauric acid amide, palmitic acid amide, hydroxy stearic acid amide, erucic acid amide, organic carboxylic acid amides such as trimesic acid tris (t-butylamide), low density polyethylene, high density polyethylene, polypropylene, polyisopropylene, polybutene Polymers such as poly-4-methylpentene, poly-3-methylbutene-1, polyvinylcycloalkane, polyvinyltrialkylsilane, and high melting point polylactic acid, Sodium salt or potassium salt of a polymer having a carboxyl group such as sodium salt of tylene-acrylic acid or methacrylic acid copolymer, sodium salt of styrene-maleic anhydride copolymer (so-called ionomer), benzylidene sorbitol and its derivatives, sodium-2, Phosphorus compound metal salts such as 2'-methylenebis (4,6-di-t-butylphenyl) phosphate and 2,2-methylbis (4,6-di-t-butylphenyl) sodium can be exemplified. .

  As the crystal nucleating agent used in the present invention, among those exemplified above, at least one selected from talc, organic carboxylic acid metal salts and organic carboxylic acid amides is particularly preferable. The crystal nucleating agent used in the present invention may be used alone or in combination of two or more.

  The compounding amount of the crystal nucleating agent is preferably in the range of 0.01 to 30 parts by weight, more preferably in the range of 0.05 to 10 parts by weight, with respect to 100 parts by weight of the biodegradable resin. The range of 5 parts by weight is more preferable.

  As the plasticizer used in the present invention, those generally known can be used. For example, polyester plasticizer, glycerin plasticizer, polyvalent carboxylic acid ester plasticizer, phosphate ester plasticizer. And polyalkylene glycol plasticizers and epoxy plasticizers.

  Specific examples of the polyester plasticizer include dicarboxylic acid components such as adipic acid, sebacic acid, terephthalic acid, isophthalic acid, naphthalenedicarboxylic acid, diphenyldicarboxylic acid, propylene glycol, 1,3-butanediol, 1,4- Examples thereof include polyesters composed of diol components such as butanediol, 1,6-hexanediol, ethylene glycol and diethylene glycol, and polyesters composed of hydroxycarboxylic acids such as polycaprolactone. These polyesters may be end-capped with a monofunctional carboxylic acid or monofunctional alcohol, or may be end-capped with an epoxy compound or the like.

  Specific examples of the glycerin plasticizer include glycerin monoacetomonolaurate, glycerin diacetomonolaurate, glycerin monoacetomonostearate, glycerin diacetomonooleate, and glycerin monoacetomonomontanate.

  Specific examples of polycarboxylic acid ester plasticizers include phthalates such as dimethyl phthalate, diethyl phthalate, dibutyl phthalate, dioctyl phthalate, diheptyl phthalate, dibenzyl phthalate, and butyl benzyl phthalate. Trimellitic acid esters such as tributyl acid, trioctyl trimellitic acid, trihexyl trimellitic acid, succinic acid esters such as methyl diglycol butyl diglycol succinate, benzyl methyl diglycol succinate and benzyl butyl diglycol succinate, diisodecyl adipate , N-octyl-n-decyladipate adipate, bis (butyldiglycol) adipate, methyldiglycolbutyldiglycoladipate, benzylmethyldiglycolate Adipates such as pete and benzylbutyl diglycol adipate, triethyl acetylcitrate, tributyl acetylcitrate, methoxycarbonylmethyldibutylcytolate, ethoxycarbonylmethyldibutylcytolate, butoxycarbonylmethyldibutylcytolate, dimethoxycarbonylmethylmonobutylsite Citrate esters such as dirate, diethoxycarbonylmethyl monobutyl citrate and dibutoxycarbonylmethyl monobutyl citrate, azelaic acid esters such as di-2-ethylhexyl azelate, dibutyl sebacate and di-2-ethylhexyl sebacate, etc. Sebacic acid esters of methyl diglycol butyl diglycol succinate, Dimethyl diglycol succinate, benzyl butyl diglycol succinate, methyl diglycol butyl diglycol adipate, benzyl methyl diglycol adipate, benzyl butyl diglycol adipate, methoxycarbonylmethyl dibutyl citrate, ethoxycarbonylmethyl dibutyl citrate, butoxycarbonyl Ester plasticizers composed of polyvalent carboxylic acids such as methyldibutyl citrate, dimethoxycarbonylmethyl monobutyl citrate, diethoxycarbonylmethyl monobutyl citrate, dibutoxycarbonylmethyl monobutyl citrate and two or more alcohols (mixed Group ester).

  Specific examples of the phosphate ester plasticizer include tributyl phosphate, tri-2-ethylhexyl phosphate, trioctyl phosphate, triphenyl phosphate, diphenyl-2-ethylhexyl phosphate and tricresyl phosphate. .

  Specific examples of the polyalkylene glycol plasticizer include polyethylene glycol, polypropylene glycol, poly (ethylene oxide / propylene oxide) block and / or random copolymer, polytetramethylene glycol, ethylene oxide addition polymer of bisphenols, bisphenols Polyalkylene glycols such as propylene oxide addition polymers, tetrahydrofuran addition polymers of bisphenols, or terminal-capped compounds such as terminal epoxy-modified compounds, terminal ester-modified compounds, and terminal ether-modified compounds.

  The epoxy plasticizer generally refers to an epoxy triglyceride composed of an alkyl epoxy stearate and soybean oil, but there are also so-called epoxy resins mainly made of bisphenol A and epichlorohydrin. Can be used.

  Specific examples of other plasticizers include benzoate esters of aliphatic polyols such as neopentyl glycol dibenzoate, diethylene glycol dibenzoate, triethylene glycol di-2-ethylbutyrate, fatty acid amides such as stearamide, oleic acid Examples thereof include aliphatic carboxylic acid esters such as butyl, oxyacid esters such as methyl acetylricinoleate and butyl acetylricinoleate, pentaerythritol, various sorbitols, polyacrylic acid esters, silicone oils, and paraffins.

  Among the plasticizers used in the present invention, at least one selected from polyester plasticizers, polycarboxylic acid plasticizers, and polyalkylene glycol plasticizers is particularly preferable. Only one type of plasticizer may be used in the present invention, or two or more types may be used in combination.

  Moreover, the compounding quantity of a plasticizer has the preferable range of 0.01-50 weight part with respect to 100 weight part of biodegradable resin, The range of 0.1-30 weight part is more preferable, 0.5-20 A range of parts by weight is more preferred.

  In the present invention, each of the crystal nucleating agent and the plasticizer may be used alone, but it is preferable to use both in combination.

  In the present invention, it is preferable to add a thermoplastic resin other than a biodegradable resin in that a material excellent in surface appearance, moldability, mechanical properties, heat resistance, toughness and the like can be easily obtained.

  In the present invention, the thermoplastic resin other than the biodegradable resin is not particularly limited, and any resin that does not have biodegradability can be used. For example, polyacetal resin, non-biodegradable polyester resin, polyamide resin, polyolefin resin such as polyethylene resin and polypropylene resin, polystyrene resin, acrylic resin, polyurethane resin, chlorinated polyethylene resin, chlorinated polypropylene resin, aromatic and aliphatic Polyketone resin, fluorine resin, polyphenylene sulfide resin, polyether ether ketone resin, polyimide resin, thermoplastic starch resin, AS resin, ABS resin, AES resin, ACS resin, polyvinyl chloride resin, polyvinylidene chloride resin, vinyl ester Resin, polyurethane resin, MS resin, polycarbonate resin, polyarylate resin, polysulfone resin, polyethersulfone resin, phenoxy resin, polyphenylene oxide resin, poly-4- Non-biodegradable thermoplastic resins such as tilpentene-1, polyetherimide resin, cellulose acetate resin, and polyvinyl alcohol resin can be exemplified, and among them, selected from polyacetal resin, non-biodegradable polyester resin, and polyamide resin It is preferable to blend at least one selected from the above. By blending these resins, a molded product having excellent characteristics can be obtained.

  In the present invention, the polyacetal resin is a polymer having an oxymethylene unit as a main repeating unit, and even a so-called polyacetal homopolymer obtained by a polymerization reaction using formaldehyde or trioxane as a main raw material, mainly from an oxymethylene unit. Which may be any so-called polyacetal copolymer containing not more than 15% by weight of oxyalkylene units having 2 to 8 adjacent carbon atoms in the main chain, and also containing other structural units, Any of a block copolymer, a terpolymer, and a crosslinked polymer may be used, and these may be used alone or in combination of two or more.

  Among them, a polyacetal copolymer is preferable, and a polyacetal copolymer containing 2% by weight or less of an oxyalkylene unit having 2 adjacent carbon atoms in the main chain or an oxyalkylene unit having 4 adjacent carbon atoms in the main chain Is more preferable, and a polyacetal copolymer containing 1.4 to 0.2% by weight of an oxyalkylene unit having 2 adjacent carbon atoms in the main chain or 4 in the main chain. Polyacetal copolymers containing 3 to 0.5% by weight of oxyalkylene units having adjacent carbon atoms are particularly preferred.

  The viscosity of the polyacetal resin of the present invention is not particularly limited as long as it can be used as a molding material, but the melt flow rate (MFR) can be measured by the ASTM D1238 method, and the MFR is 1.0 to 50 g / 10. Minute range is preferable, and 1.5 to 35 g / 10 min is particularly preferable.

  The polyacetal resin in the present invention includes 2,2′-methylenebis (4-methyl-6-tert-butylphenol), calcium ricinoleate, cyanoguanazine, hexamethylenebis (3,5-t-butyl-4-hydroxyhydrocyanate ), Melamine-formaldehyde resin, nylon 6/66, nylon 66/610/6, nylon 612/6, tetrakis [methylene (3,5-di-t-butyl-4-hydroxyhydrocyanate)] methane, 1, 6-hexanediol bis [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate], triethylene glycol [3- (3,5-di-t-butyl-5-methyl-4- Hydroxyphenyl) propionate] is preferably contained.

  In the present invention, a resin composition and a molded article excellent in surface appearance, moldability, mechanical properties, heat resistance, and toughness can be obtained by blending a polyacetal resin.

  In the present invention, the non-biodegradable polyester resin is a polymer or copolymer obtained by polycondensation of a dicarboxylic acid or its ester-forming derivative and a diol or its ester-forming derivative. It is a thermoplastic polyester resin.

  Examples of the dicarboxylic acid or ester-forming derivative thereof include terephthalic acid, isophthalic acid, phthalic acid, 2,6-naphthalenedicarboxylic acid, 1,5-naphthalenedicarboxylic acid, bis (p-carboxyphenyl) methane, anthracene dicarboxylic acid, Aromatic dicarboxylic acids such as 4,4'-diphenyl ether dicarboxylic acid, 5-tetrabutylphosphonium isophthalic acid, 5-sodium sulfoisophthalic acid, oxalic acid, succinic acid, adipic acid, sebacic acid, azelaic acid, dodecanedioic acid, malon Examples thereof include aliphatic dicarboxylic acids such as acid, glutaric acid and dimer acid, alicyclic dicarboxylic acid units such as 1,3-cyclohexanedicarboxylic acid and 1,4-cyclohexanedicarboxylic acid, and ester-forming derivatives thereof.

  Examples of the diol or ester-forming derivatives thereof include aliphatic glycols having 2 to 20 carbon atoms, that is, ethylene glycol, propylene glycol, 1,4-butanediol, neopentyl glycol, 1,5-pentanediol, 1, Aroma such as 6-hexanediol, decamethylene glycol, cyclohexanedimethanol, cyclohexanediol, dimer diol or the like, or a long chain glycol having a molecular weight of 200 to 100,000, that is, polyethylene glycol, poly-1,3-propylene glycol, polytetramethylene glycol, etc. Dioxy compounds such as 4,4′-dihydroxybiphenyl, hydroquinone, t-butylhydroquinone, bisphenol A, bisphenol S, bisphenol F, and the like And La ester forming derivatives.

  Specific examples of these polymers or copolymers include polybutylene terephthalate, polybutylene (terephthalate / isophthalate), polypropylene terephthalate, polypropylene (terephthalate / isophthalate), polyethylene terephthalate, polyethylene (terephthalate / isophthalate). Bisphenol A (terephthalate / isophthalate), polybutylene naphthalate, polybutylene (terephthalate / naphthalate), polypropylene naphthalate, polyethylene naphthalate, polycyclohexanedimethylene terephthalate, polycyclohexanedimethylene (terephthalate / isophthalate), poly (Cyclohexanedimethylene / ethylene) terephthalate, poly (cyclohexanedimethylene / ethylene) Aromatic polyester such as terephthalate / isophthalate), polybutylene (terephthalate / isophthalate) / bisphenol A, polyethylene (terephthalate / isophthalate) / bisphenol A, polyether ester copolymer of polybutylene terephthalate / polyethylene glycol, polyethylene terephthalate Polyethylene glycol polyether ester copolymer, polybutylene terephthalate, poly (tetramethylene oxide) glycol block copolymer, polybutylene terephthalate / isophthalate, poly (tetramethylene oxide) glycol block copolymer, polybutylene terephthalate Poly (propylene oxide / ethylene oxide) glycol block copolymer, polybutylene terephthalate Polyether or aliphatic polyester such as poly (propylene oxide / ethylene oxide) glycol block copolymer, polybutylene terephthalate / polybutylene adipate block copolymer, polybutylene terephthalate / poly-ε-caprolactone copolymer And a liquid crystalline polyester such as a copolymer obtained by copolymerization of a polyester with an aromatic polyester and a copolymer polyester such as p-oxybenzoic acid / polyethylene terephthalate and p-oxybenzoic acid / 6-oxy-2-naphthoic acid.

  In the present invention, a resin composition and a molded product excellent in surface appearance, moldability, mechanical properties, heat resistance, and toughness can be obtained by blending the polyester.

  In the present invention, the polyamide resin is a thermoplastic polymer having an amide bond starting from an amino acid, lactam or diamine and a dicarboxylic acid.

  Examples of amino acids include 6-aminocaproic acid, 11-aminoundecanoic acid, 12-aminododecanoic acid, and paraaminomethylbenzoic acid. Examples of lactam include ε-caprolactam and ω-laurolactam.

  Examples of the diamine include tetramethylene diamine, hexamethylene diamine, undecamethylene diamine, dodecamethylene diamine, 2,2,4-trimethylhexamethylene diamine, 2,4,4-trimethylhexamethylene diamine, 5-methylnonamethylene diamine, 2,4-dimethyloctamethylenediamine, metaxylylenediamine, paraxylylenediamine, 1,3-bis (aminomethyl) cyclohexane, 1-amino-3-aminomethyl-3,5,5-trimethylcyclohexane, 3, 8-bis (aminomethyl) tricyclodecane, bis (4-aminocyclohexyl) methane, bis (3-methyl-4-aminocyclohexyl) methane, 2,2-bis (4-aminocyclohexyl) propane, bis (aminopropyl) ) Piperazine, Ami Such as ethyl piperazine, and the like.

  Dicarboxylic acids include adipic acid, suberic acid, azelaic acid, sebacic acid, dodecanedioic acid, terephthalic acid, isophthalic acid, naphthalenedicarboxylic acid, 2-chloroterephthalic acid, 2-methylterephthalic acid, 5-methylisophthalic acid, 5- Examples include sodium sulfoisophthalic acid, hexahydroterephthalic acid, hexahydroisophthalic acid, and diglycolic acid.

  Preferred polyamides used in the present invention include polycaproamide (nylon 6), polytetramethylene adipamide (nylon 46), polyhexamethylene adipamide (nylon 66), polyhexamethylene sebacamide (nylon). 610), polyhexamethylene dodecamide (nylon 612), polyundecane methylene adipamide (nylon 116), polyundecanamide (nylon 11), polydodecanamide (nylon 12), polytrimethylhexamethylene terephthalamide, polyhexa Methylene isophthalamide (nylon 6I), polyhexamethylene terephthalate / isophthalamide (nylon 6T / 6I), polybis (4-aminocyclohexyl) methane dodecamide (nylon PACM12), polybis (3-methyl-4) Aminocyclohexyl) methane dodecamide (nylon dimethyl PACM12), polymetaxylylene adipamide (nylon MXD6), polyundecamethylene terephthalamide (nylon 11T), polyundecamethylene hexahydroterephthalamide (nylon 11T (H)) and These copolyamides, mixed polyamides and the like. Among these, nylon 6, nylon 66, nylon 11, nylon 12, nylon 610, nylon 612, nylon 116 and their copolymerized polyamide and mixed polyamide are preferable, and nylon 6, nylon 11, and nylon 12 are particularly preferable.

Moreover, from the problem of the thermal stability of the biodegradable resin and the paper dust , the melting point of the polyamide resin to be used is preferably 90 to 240 ° C, and preferably 100 to 230 ° C.

  In the present invention, a resin composition and a molded product excellent in surface appearance, moldability, mechanical properties, heat resistance and toughness can be obtained by blending a polyamide resin.

In the present invention, an impact modifier can be blended as a thermoplastic resin other than the biodegradable resin. By blending a biodegradable resin, paper powder , and an impact resistance improver, a resin composition and a molded product excellent in impact resistance, toughness, heat resistance, and mechanical properties can be obtained.

  The impact resistance improver used in the present invention is not particularly limited as long as it can be used for improving the impact resistance of a thermoplastic resin. For example, at least one selected from the following various impact resistance improvers can be used.

  That is, specific examples of impact modifiers include ethylene-propylene copolymers, ethylene-propylene-nonconjugated diene copolymers, ethylene-butene-1 copolymers, various acrylic rubbers, ethylene-acrylic acid copolymers. And alkali metal salts thereof (so-called ionomers), ethylene-glycidyl (meth) acrylate copolymers, ethylene-alkyl acrylate copolymers (for example, ethylene-ethyl acrylate copolymers, ethylene-butyl acrylate copolymers) ), Acid-modified ethylene-propylene copolymer, diene rubber (for example, polybutadiene, polyisoprene, polychloroprene), copolymer of diene and vinyl monomer (for example, styrene-butadiene random copolymer, styrene-butadiene block copolymer) Coalescence, styrene-butadiene Styrene block copolymer, styrene-isoprene random copolymer, styrene-isoprene block copolymer, styrene-isoprene-styrene block copolymer, polybutadiene grafted with styrene, butadiene-acrylonitrile copolymer) , Polyisobutylene, a copolymer of isobutylene and butadiene or isoprene, natural rubber, thiocol rubber, polysulfide rubber, polyurethane rubber, polyether rubber, epichlorohydrin rubber and the like.

  Furthermore, it is composed of those having various degrees of cross-linking, various micro structures such as those having a cis structure, a trans structure, etc., those having a vinyl group, etc., a core layer and one or more shell layers covering it, A so-called core-shell type multi-layered polymer in which adjacent layers are made of different polymers can also be used.

  The various (co) polymers mentioned in the above specific examples may be any of random copolymers, block copolymers and graft copolymers, and can be used as the impact resistance improver of the present invention. it can.

  Furthermore, in making these (co) polymers, it is also possible to copolymerize monomers such as other olefins, dienes, aromatic vinyl compounds, acrylic acid, acrylic ester and methacrylic ester. is there.

  Among these impact modifiers, a polymer containing an acrylic unit and a polymer containing a unit having an acid anhydride group and / or a glycidyl group are preferable. Preferable examples of the acrylic unit herein include methyl methacrylate units, methyl acrylate units, ethyl acrylate units and butyl acrylate units. Preferred examples of units having an acid anhydride group or glycidyl group May include maleic anhydride units and glycidyl methacrylate units.

  The impact resistance improver is a so-called core-shell type multi-layer polymer composed of a core layer and one or more shell layers covering the core layer, and adjacent layers are composed of different polymers. It is preferable that the polymer is a multilayer structure polymer containing methyl methacrylate units or methyl acrylate units in the shell layer. Such a multilayer structure polymer preferably contains an acrylic unit, or preferably contains a unit having an acid anhydride group and / or a glycidyl group. Preferred examples of the acrylic unit include a methyl methacrylate unit, an acrylic acid A methyl unit, an ethyl acrylate unit, and a butyl acrylate unit can be mentioned, As a suitable example of a unit which has an acid anhydride group and a glycidyl group, a maleic anhydride unit and a glycidyl methacrylate unit can be mentioned. In particular, the shell layer contains at least one selected from methyl methacrylate units, methyl acrylate units, maleic anhydride units and glycidyl methacrylate units, and includes butyl acrylate units, ethyl hexyl acrylate units, styrene units and butadiene units. A multilayer structure containing at least one selected from the above in the core layer is preferably used.

  The glass transition temperature of the impact resistance improver is preferably −20 ° C. or lower, and more preferably −30 ° C. or lower.

  The blending amount of the thermoplastic resin other than the biodegradable resin in the present invention is preferably in the range of 0.5 to 120 parts by weight, and in the range of 1 to 100 parts by weight with respect to 100 parts by weight of the biodegradable resin. More preferably, it is more preferably in the range of 3 to 70 parts by weight, and particularly preferably in the range of 5 to 50 parts by weight.

In this invention, it is preferable to mix | blend fillers other than paper dust which satisfy | fills the requirements prescribed | regulated to this invention. By blending a filler other than paper powder that satisfies the requirements stipulated in the present invention, a molded product having excellent mechanical properties, heat resistance and low-temperature moldability can be obtained.

As fillers other than paper powder that satisfy the requirements defined in the present invention used in the present invention, fibers, plates, granules, and powders that are usually used to reinforce thermoplastic resins can be used. Specifically, glass fiber, asbestos fiber, carbon fiber, graphite fiber, metal fiber, potassium titanate whisker, aluminum borate whisker, magnesium-based whisker, silicon-based whisker, wollastonite, sepiolite, asbestos, slag fiber, zonolite, Elastadite, gypsum fiber, silica fiber, silica-alumina fiber, zirconia fiber, boron nitride fiber, silicon nitride fiber, and fibrous inorganic fillers such as boron fiber, fibrous organic fillers such as polyester fiber, nylon fiber, acrylic fiber, Glass flake, non-swelling mica, graphite, metal foil, ceramic beads, talc, clay, mica, sericite, zeolite, bentonite, dolomite, kaolin, finely divided silicic acid, feldspar powder, potassium titanate, shirasu balloon, carbonic acid Plate-like and granular inorganic fillers such as Lucium, Magnesium carbonate, Barium sulfate, Calcium oxide, Aluminum oxide, Titanium oxide, Aluminum silicate, Silicon oxide, Gypsum, Novacurite, Dawsonite and Clay, meet the requirements specified in the present invention There is no paper dust . Among these fillers, fibrous inorganic fillers, plate-like inorganic fillers, or paper powders that do not satisfy the requirements specified in the present invention are preferable, especially glass fibers, wollastonite, aluminum borate whiskers, potassium titanate. Whisker, mica and kaolin are preferred. These fillers can be used alone or in combination of two or more. The aspect ratio of the fibrous filler is preferably 5 or more, more preferably 10 or more, and further preferably 20 or more.

The filler other than the above paper powder may be coated or focused with a thermoplastic resin such as an ethylene / vinyl acetate copolymer or a thermosetting resin such as an epoxy resin, or a cup such as aminosilane or epoxysilane. It may be treated with a ring agent or the like.

Moreover, in this invention, it is preferable to mix | blend the layered silicate by which the exchangeable cation which exists between layers was exchanged with the organic onium ion as fillers other than paper dust . In the present invention, the layered silicate in which the exchangeable cation existing between the layers is exchanged with the organic onium ion is the exchange of the exchangeable cation of the layered silicate having the exchangeable cation between the layers with the organic onium ion. Inclusion compound.

  A layered silicate having an exchangeable cation between layers has a structure in which plate-like materials having a width of 0.05 to 0.5 μm and a thickness of 6 to 15 angstroms are laminated. Has a cation. The cation exchange capacity is 0.2 to 3 meq / g, and preferably the cation exchange capacity is 0.8 to 1.5 meq / g.

  Specific examples of layered silicates include smectite clay minerals such as montmorillonite, beidellite, nontronite, saponite, hectorite, and soconite, various clay minerals such as vermiculite, halloysite, kanemite, kenyanite, zirconium phosphate, titanium phosphate, Li type Examples include swellable mica such as fluorine teniolite, Na-type fluorine teniolite, Na-type tetrasilicon fluorine mica, and Li-type tetrasilicon fluorine mica, and may be natural or synthesized. Among these, smectite clay minerals such as montmorillonite and hectorite, and swellable synthetic mica such as Na-type tetrasilicon fluorine mica and Li-type fluorine teniolite are preferable.

  Examples of organic onium ions include ammonium ions, phosphonium ions, and sulfonium ions. Of these, ammonium ions and phosphonium ions are preferred, and ammonium ions are particularly preferred. As the ammonium ion, any of primary ammonium, secondary ammonium, tertiary ammonium, and quaternary ammonium may be used.

  Primary ammonium ions include decyl ammonium, dodecyl ammonium, octadecyl ammonium, oleyl ammonium, benzyl ammonium and the like.

  Secondary ammonium ions include methyl dodecyl ammonium and methyl octadecyl ammonium.

  Examples of tertiary ammonium ions include dimethyl dodecyl ammonium and dimethyl octadecyl ammonium.

  Quaternary ammonium ions include benzyltrialkylammonium ions such as benzyltrimethylammonium, benzyltriethylammonium, benzyltributylammonium, benzyldimethyldodecylammonium, benzyldimethyloctadecylammonium, benzalkonium, trimethyloctylammonium, trimethyldodecylammonium, and trimethyloctadecylammonium. Alkyltrimethylammonium ions such as dimethyldioctylammonium, dimethyldidodecylammonium, dimethyldialkylammonium ions such as dimethyldioctadecylammonium, trialkylmethylammonium ions such as trioctylmethylammonium and tridodecylmethylammonium, benzene Such as benzethonium ion having two thereof.

  In addition to these, aniline, p-phenylenediamine, α-naphthylamine, p-aminodimethylaniline, benzidine, pyridine, piperidine, 6-aminocaproic acid, 11-aminoundecanoic acid, 12-aminododecanoic acid, amino at the terminal Examples also include ammonium ions derived from polyalkylene glycols having a group.

  Among these ammonium ions, preferred compounds include trioctylmethylammonium, benzyldimethyldodecylammonium, benzyldimethyloctadecylammonium, benzalkonium and the like. These ammonium ions are generally available as a mixture, and the above compound names are representative compound names containing a small amount of analogs. These may be used alone or in combination of two or more.

  Further, those having a reactive functional group and those having high affinity are preferable, and ammonium ions derived from 12-aminododecanoic acid, polyalkylene glycol having an amino group at the terminal, and the like are also preferable.

  The layered silicate in which the exchangeable cation existing in the interlayer used in the present invention is exchanged with the organic onium ion is obtained by reacting the layered silicate having the exchangeable cation between the layer and the organic onium ion by a known method. Can be manufactured. Specifically, a method by an ion exchange reaction in a polar solvent such as water, methanol, ethanol, or a method by directly reacting a layered silicate with a liquid or melted ammonium salt may be used.

  In the present invention, the amount of organic onium ions relative to the layered silicate is determined by the cation exchange of the layered silicate in terms of the dispersibility of the layered silicate, the thermal stability during melting, the gas during molding, the suppression of odor generation, etc. Usually, the amount is in the range of 0.4 to 2.0 equivalents, preferably 0.8 to 1.2 equivalents with respect to the capacity.

  In addition to the above organic onium salts, these layered silicates are preferably pretreated with a coupling agent having a reactive functional group in order to obtain better mechanical strength. Examples of the coupling agent having a reactive functional group include isocyanate compounds, organic silane compounds, organic titanate compounds, organic borane compounds, and epoxy compounds.

In the present invention, the amount of filler other than paper dust is preferably 0.1 to 300 parts by weight, more preferably 0.5 to 200 parts by weight, with respect to 100 parts by weight of the biodegradable resin. Part by weight is more preferable, and 1 to 50 parts by weight is particularly preferable.

  In the present invention, a stabilizer is preferably added from the viewpoint that a resin composition and a molded product excellent in mechanical properties, moldability, heat resistance and durability can be easily obtained. As a stabilizer used by this invention, what is normally used for the stabilizer of a thermoplastic resin can be used. Specific examples include antioxidants and ultraviolet absorbers.

  Examples of the antioxidant used in the present invention include hindered phenol compounds, phosphite compounds, and thioether compounds.

  Examples of hindered phenol compounds include n-octadecyl-3- (3 ′, 5′-di-tert-butyl-4′-hydroxyphenyl) -propionate, n-octadecyl-3- (3′-methyl- 5'-tert-butyl-4'-hydroxyphenyl) -propionate, n-tetradecyl-3- (3 ', 5'-di-tert-butyl-4'-hydroxyphenyl) -propionate, 1,6-hexanediol -Bis- [3- (3,5-di-t-butyl-4-hydroxyphenyl) -propionate], 1,4-butanediol-bis- [3- (3,5-di-t-butyl-4 -Hydroxyphenyl) propionate], 2,2′-methylenebis- (4-methyl-t-butylphenol), triethylene glycol-bis- [3- (3-t-butyl-5- Til-4-hydroxyphenyl) propionate], tetrakis [methylene-3- (3 ′, 5′-di-t-butyl-4′-hydroxyphenyl) propionate] methane, 3,9-bis [2- {3- (3-t-butyl-4-hydroxy-5-methylphenyl) propionyloxy} -1,1-dimethylethyl] 2,4,8,10-tetraoxaspiro (5,5) undecane, N, N′- Bis-3- (3 ′, 5′-di-t-butyl-4′-hydroxyphenyl) propionylhexamethylenediamine, N, N′-tetramethylene-bis-3- (3′-methyl-5′-t -Butyl-4'-hydroxyphenol) propionyldiamine, N, N'-bis- [3- (3,5-di-t-butyl-4-hydroxyphenol) propionyl] hydrazide N-salicyloyl-N'-salicylidenehydrazine, 3- (N-salicyloyl) amino-1,2,4-triazole, N, N'-bis [2- {3- (3,5-di-t -Butyl-4-hydroxyphenyl) propionyloxy} ethyl] oxyamide and the like. Preferably, triethylene glycol-bis- [3- (3-tert-butyl-5-methyl-4-hydroxyphenyl) propionate] and tetrakis [methylene-3- (3 ′, 5′-di-tert-butyl- 4'-hydroxyphenyl) propionate] methane.

  As the phosphite compound, those in which at least one P—O bond is bonded to an aromatic group are preferable. Specific examples include tris (2,4-di-t-butylphenyl) phosphite, tetrakis ( 2,4-di-t-butylphenyl) 4,4′-biphenylenephosphonite, bis (2,4-di-t-butylphenyl) pentaerythritol-di-phosphite, bis (2,6-di-) t-butyl-4-methylphenyl) pentaerythritol-di-phosphite, 2,2-methylenebis (4,6-di-t-butylphenyl) octyl phosphite, 4,4′-butylidene-bis (3-methyl) -6-tert-butylphenyl-di-tridecyl) phosphite, 1,1,3-tris (2-methyl-4-ditridecyl phosphite-5-tert-butyl-phenyl) Nyl) butane, tris (mixed mono and di-nonylphenyl) phosphite, tris (nonylphenyl) phosphite, 4,4′-isopropylidenebis (phenyl-dialkyl phosphite) and the like, and tris (2, 4-di-t-butylphenyl) phosphite, 2,2-methylenebis (4,6-di-t-butylphenyl) octyl phosphite, bis (2,6-di-t-butyl-4-methylphenyl) Pentaerythritol-di-phosphite, tetrakis (2,4-di-t-butylphenyl) -4,4′-biphenylenephosphonite and the like can be preferably used.

  Specific examples of the thioether compound include dilauryl thiodipropionate, ditridecyl thiodipropionate, dimyristyl thiodipropionate, distearyl thiodipropionate, pentaerythritol-tetrakis (3-laurylthiopropionate). Nate), pentaerythritol-tetrakis (3-dodecylthiopropionate), pentaerythritol-tetrakis (3-octadecylthiopropionate), pentaerythritol-tetrakis (3-myristylthiopropionate), pentaerythritol-tetrakis ( 3-stearyl thiopropionate).

  Examples of the ultraviolet absorber used in the present invention include benzophenone compounds, benzotriazole compounds, aromatic benzoate compounds, oxalic acid anilide compounds, cyanoacrylate compounds and hindered amine compounds.

  Specific examples of benzophenone compounds include benzophenone, 2,4-dihydrobenzophenone, 2,2 ′, 4,4′-tetrahydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, and 2,2′-dihydroxy. -4,4'-dimethoxybenzophenone, 2,2'-dihydroxybenzophenone, 2-hydroxy-4-octoxybenzophenone, 2-hydroxy-4-dodecyloxybenzophenone, 2-hydroxy-4-methoxy-5 Sulfobenzophenone, 5-chloro-2-hydroxybenzophenone, 2,2′-dihydroxy-4,4′-dimethoxy-5-sulfobenzophenone, 2-hydroxy-4-methoxy-2′-carboxybenzophenone, 2-hydroxy -4- (2-hydroxy-3-methyl-acrylic Such as carboxymethyl isopropoxycarbonyl benzophenone and the like.

  Specific examples of the benzotriazole-based compound include 2- (5-methyl-2-hydroxyphenyl) benzotriazole, 2- (3,5-di-tert-amyl-2-hydroxyphenyl) benzotriazole, 2- (3,5-di-tert-butyl-2-hydroxyphenyl) benzotriazole, 2- (2′-hydroxy-3 ′, 5′-di-tert-butyl-5′-methyl-phenyl) benzotriazole, 2 -(3,5-di-tert-butyl-2-hydroxyphenyl) -5-chlorobenzotriazole, 2- (3,5-di-tert-isoamyl-2-hydroxyphenyl) benzotriazole, (2-hydroxy- 5-tert-butylphenyl) benzotriazole, 2- [2′-hydroxy-3 ′, 5′-bis (α, α-di Tylbenzyl) phenyl] benzotriazole, 2- [2′-hydroxy-3 ′, 5′-bis- (α, α-dimethylbenzyl) phenyl] -2H-benzotriazole, 2- (2′-hydroxy-4′- Octoxyphenyl) benzotriazole and the like.

  Specific examples of the aromatic benzoate compound include alkylphenyl salicylates such as pt-butylphenyl salicylate and p-octylphenyl salicylate.

  Specific examples of oxalic acid anilide compounds include 2-ethoxy-2′-ethyloxalic acid bisanilide, 2-ethoxy-5-tert-butyl-2′-ethyloxalic acid bisanilide, 2- And ethoxy-3′-dodecyl oxalic acid bisanilide.

  Specific examples of the cyanoacrylate compound include ethyl-2-cyano-3,3'-diphenyl-acrylate, 2-ethylhexyl-2-cyano-3,3'-diphenyl-acrylate, and the like.

  Specific examples of hindered amine compounds include 4-acetoxy-2,2,6,6-tetramethylpiperidine, 4-stearoyloxy-2,2,6,6-tetramethylpiperidine, 4-acryloyloxy-2. , 2,6,6-tetramethylpiperidine, 4- (phenylacetoxy) -2,2,6,6-tetramethylpiperidine, 4-benzoyloxy-2,2,6,6-tetramethylpiperidine, 4-methoxy -2,2,6,6-tetramethylpiperidine, 4-stearyloxy-2,2,6,6-tetramethylpiperidine, 4-cyclohexyloxy-2,2,6,6-tetramethylpiperidine, 4-benzyl Oxy-2,2,6,6-tetramethylpiperidine, 4-phenoxy-2,2,6,6-tetramethylpiperidine, 4- (d Rucarbamoyloxy) -2,2,6,6-tetramethylpiperidine, 4- (cyclohexylcarbamoyloxy) -2,2,6,6-tetramethylpiperidine, 4- (phenylcarbamoyloxy) -2,2,6 6-tetramethylpiperidine, bis (2,2,6,6-tetramethyl-4-piperidyl) -carbonate, bis (2,2,6,6-tetramethyl-4-piperidyl) -oxalate, bis (2, 2,6,6-tetramethyl-4-piperidyl) -malonate, bis (2,2,6,6-tetramethyl-4-piperidyl) -sebacate, bis (2,2,6,6-tetramethyl-4 -Piperidyl) -adipate, bis (2,2,6,6-tetramethyl-4-piperidyl) -terephthalate, 1,2-bis (2,2,6,6-tetramethyl) Ru-4-piperidyloxy) -ethane, α, α′-bis (2,2,6,6-tetramethyl-4-piperidyloxy) -p-xylene, bis (2,2,6,6-tetramethyl) -4-piperidyltolylene-2,4-dicarbamate, bis (2,2,6,6-tetramethyl-4-piperidyl) -hexamethylene-1,6-dicarbamate, tris (2,2,6, 6-tetramethyl-4-piperidyl) -benzene-1,3,5-tricarboxylate, tris (2,2,6,6-tetramethyl-4-piperidyl) -benzene-1,3,4-tricarboxy 1- [2- {3- (3,5-di-t-butyl-4-hydroxyphenyl) propionyloxy} butyl] -4- [3- (3,5-di-t-butyl-4- Hydroxyphenyl) propionyl Xy] 2,2,6,6-tetramethylpiperidine, 1,2,3,4-butanetetracarboxylic acid and 1,2,2,6,6-pentamethyl-4-piperidinol and β, β, β ′, Examples include condensates with β ′,-tetramethyl-3,9- [2,4,8,10-tetraoxaspiro (5,5) undecane] diethanol.

In the present invention, the stabilizer may be used alone or in combination of two or more. Moreover, it is preferable to use a hindered phenol compound and / or a benzotriazole compound as the stabilizer. The blending amount of the stabilizer is 0.01 to 3 parts by weight with respect to 100 parts by weight of the biodegradable resin. Is preferably 0.03 to 2 parts by weight.

  In the present invention, a release agent is preferably blended from the viewpoint that a resin composition and a molded product excellent in mechanical properties, moldability, heat resistance and durability can be easily obtained. As the mold release agent used in the present invention, those usually used for a thermoplastic resin mold release agent can be used. Specifically, fatty acids, fatty acid metal salts, oxy fatty acids, fatty acid esters, partially aliphatic saponified esters, paraffin, low molecular weight polyolefins, fatty acid amides, alkylene bis fatty acid amides, aliphatic ketones, fatty acid lower alcohol esters, fatty acid polyhydric alcohols Examples thereof include esters, fatty acid polyglycol esters, and modified silicones.

  As the fatty acid, those having 6 to 40 carbon atoms are preferable. Specifically, oleic acid, lauric acid, stearic acid, hydroxystearic acid, behenic acid, arachidonic acid, linoleic acid, linolenic acid, ricinoleic acid, palmitic acid, Examples include stearic acid, montanic acid, and mixtures thereof. As the fatty acid metal salt, an alkali metal salt or an alkaline earth metal salt of a fatty acid having 6 to 40 carbon atoms is preferable, and specific examples include calcium stearate, sodium montanate, and calcium montanate. Examples of the oxy fatty acid include 1,2-oxystearic acid, and examples of the fatty acid ester include stearic acid ester, oleic acid ester, linoleic acid ester, linolenic acid ester, adipic acid ester, behenic acid ester, arachidic acid ester, and montan. Examples of the acid ester, isostearic acid ester, ester of polymerized acid, and aliphatic partially saponified ester include montanic acid partially saponified ester. As the paraffin, those having 18 or more carbon atoms are preferable, and examples thereof include liquid paraffin, natural paraffin, microcrystalline wax, petrolatum, and the like, and the low molecular weight polyolefin preferably has a molecular weight of 5000 or less, specifically, polyethylene wax, Examples thereof include maleic acid-modified polyethylene wax, oxidized type polyethylene wax, chlorinated polyethylene wax, and polypropylene wax. Fatty acid amides preferably have 6 or more carbon atoms, and specifically include oleic acid amide, erucic acid amide, and behen. Examples of the alkylene bis fatty acid amide include those having 6 or more carbon atoms. Specifically, methylene bis stearamide, ethylene bis stearamide, N, N-bis (2-H Droxyethyl) stearamide and the like, examples of the aliphatic ketone include higher aliphatic ketones, and the fatty acid lower alcohol ester preferably has 6 or more carbon atoms. Ethyl stearate, butyl stearate, ethyl behenate Examples of fatty acid polyhydric alcohol esters include glycerin monostearate, pentaerythritol monostearate, pentaerythritol tetrastearate, pentaerythritol adipate stearate, dipentaerythritol adipate stearate, sorbitan monobe Examples of the fatty acid polyglycol ester include polyethylene glycol fatty acid ester and polypropylene glycol fatty acid ester. Examples of the lycon include tilstyryl-modified silicone, polyether-modified silicone, higher fatty acid alkoxy-modified silicone, higher fatty acid-containing silicone, higher fatty acid ester-modified silicone, methacryl-modified silicone, and fluorine-modified silicone.

  Among the above, fatty acid, fatty acid metal salt, oxy fatty acid, fatty acid ester, fatty acid partial saponified ester, paraffin, low molecular weight polyolefin, aliphatic amide, alkylene bis fatty acid amide are preferred, and fatty acid partial saponified ester and / or alkylene bis fatty acid amide are preferred. More preferred.

  Of these, montanic acid ester, montanic acid partial saponified ester, polyethylene wax, oxidized polyethylene wax, sorbitan fatty acid ester, erucic acid amide, and ethylene bis stearic acid amide are preferable, and particularly, montanic acid partial saponified ester and ethylene bis stearic acid amide are preferable. .

  In this invention, the said mold release agent may be used by 1 type, and may be used in combination of 2 or more type.

  Moreover, 0.01-3 weight part is preferable with respect to 100 weight part of biodegradable resin, and, as for the compounding quantity of a mold release agent, 0.03-2 weight part is further more preferable.

In the present invention, it is preferable to add a carboxyl group-reactive end-blocking agent from the viewpoint that durability such as mechanical properties, wet heat resistance and dry heat resistance is easily improved. The carboxyl group-reactive end-blocking agent used in the present invention is not particularly limited as long as it is a compound that can block the carboxyl end group of the polymer, and those used as the carboxyl-terminal blocking agent of the polymer are used. be able to. In the present invention, the carboxyl group-reactive end-blocking agent not only blocks the end of the biodegradable resin, but also acidic groups of acidic low-molecular compounds generated by thermal decomposition or hydrolysis of the biodegradable resin or paper powder. Can also be blocked. Further, the end-capping agent is more preferably a compound that can also block the hydroxyl end where an acidic low molecular weight compound is generated by thermal decomposition.

  As such a carboxyl group-reactive end-blocking agent, it is preferable to use at least one compound selected from an epoxy compound, an oxazoline compound, an oxazine compound, and a carbodiimide compound, and among them, an epoxy compound and / or a carbodiimide compound are preferable. .

  As an epoxy compound that can be used as a carboxyl group-reactive end-blocking agent in the present invention, a glycidyl ether compound, a glycidyl ester compound, a glycidyl amine compound, a glycidyl imide compound, and an alicyclic epoxy compound can be preferably used. By blending these, a molded product having excellent mechanical properties, moldability, heat resistance and durability can be obtained.

  Examples of glycidyl ether compounds include butyl glycidyl ether, stearyl glycidyl ether, allyl glycidyl ether, phenyl glycidyl ether, o-phenylphenyl glycidyl ether, ethylene oxide lauryl alcohol glycidyl ether, ethylene oxide phenol glycidyl ether, ethylene glycol diglycidyl ether, polyethylene glycol Diglycidyl ether, propylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether, neopentyl glycol diglycidyl ether, polytetramethylene glycol diglycidyl ether, cyclohexanedimethanol diglycidyl ether, glycerol triglycidyl ether, trimethylolpropane trig Bisphenols such as sidyl ether, pentaerythritol polyglycidyl ether, 2,2-bis- (4-hydroxyphenyl) propane, 2,2-bis- (4-hydroxyphenyl) methane, bis (4-hydroxyphenyl) sulfone; Examples thereof include a bisphenol A diglycidyl ether type epoxy resin, a bisphenol F diglycidyl ether type epoxy resin, a bisphenol S diglycidyl ether type epoxy resin obtained from a condensation reaction with epichlorohydrin. Among these, bisphenol A diglycidyl ether type epoxy resin is preferable.

  Examples of glycidyl ester compounds include benzoic acid glycidyl ester, p-toluic acid glycidyl ester, cyclohexanecarboxylic acid glycidyl ester, stearic acid glycidyl ester, lauric acid glycidyl ester, palmitic acid glycidyl ester, versatic acid glycidyl ester, oleic acid glycidyl ester Ester, linoleic acid glycidyl ester, linolenic acid glycidyl ester, terephthalic acid diglycidyl ester, isophthalic acid diglycidyl ester, phthalic acid diglycidyl ester, naphthalene dicarboxylic acid diglycidyl ester, bibenzoic acid diglycidyl ester, methyl terephthalic acid diglycidyl ester , Hexahydrophthalic acid diglycidyl ester, tetrahydrophthalic acid diglycidyl ester, Hexanedicarboxylic acid diglycidyl ester, adipic acid diglycidyl ester, succinic acid diglycidyl ester, sebacic acid diglycidyl ester, dodecanedioic acid diglycidyl ester, octadecanedicarboxylic acid diglycidyl ester, trimellitic acid triglycidyl ester, pyromellitic acid tetra A glycidyl ester etc. can be mentioned. Among these, benzoic acid glycidyl ester and versatic acid glycidyl ester are preferable.

  Examples of glycidylamine compounds include tetraglycidylaminodiphenylmethane, triglycidyl-paraaminophenol, triglycidyl-metaaminophenol, diglycidylaniline, diglycidyltoluidine, tetraglycidylmetaxylenediamine, diglycidyltribromoaniline, tetraglycidylbisamino Examples include methylcyclohexane, triglycidyl cyanurate, and triglycidyl isocyanurate.

  Examples of glycidylimide compounds include N-glycidylphthalimide, N-glycidyl-4-methylphthalimide, N-glycidyl-4,5-dimethylphthalimide, N-glycidyl-3-methylphthalimide, N-glycidyl-3,6- Dimethylphthalimide, N-glycidyl-4-ethoxyphthalimide, N-glycidyl-4-chlorophthalimide, N-glycidyl-4,5-dichlorophthalimide, N-glycidyl-3,4,5,6-tetrabromophthalimide, N -Glycidyl-4-n-butyl-5-bromophthalimide, N-glycidyl succinimide, N-glycidyl hexahydrophthalimide, N-glycidyl-1,2,3,6-tetrahydrophthalimide, N-glycidyl maleimide, N- Glycidyl-α, β-dimethyl Succinimide, N-glycidyl-α-ethylsuccinimide, N-glycidyl-α-propylsuccinimide, N-glycidylbenzamide, N-glycidyl-p-methylbenzamide, N-glycidylnaphthamide, N-glycidylsteramide, etc. be able to. Of these, N-glycidylphthalimide is preferable.

  Examples of alicyclic epoxy compounds include 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexylcarboxylate, bis (3,4-epoxycyclohexylmethyl) adipate, vinylcyclohexene diepoxide, N-methyl-4, 5-epoxycyclohexane-1,2-dicarboxylic imide, N-ethyl-4,5-epoxycyclohexane-1,2-dicarboxylic imide, N-phenyl-4,5-epoxycyclohexane-1,2-dicarboxylic imide N-naphthyl-4,5-epoxycyclohexane-1,2-dicarboxylic imide, N-tolyl-3-methyl-4,5-epoxycyclohexane-1,2-dicarboxylic imide, and the like.

  As other epoxy compounds, epoxy-modified fatty acid glycerides such as epoxidized soybean oil, epoxidized linseed oil, and epoxidized whale oil, phenol novolac type epoxy resins, cresol nozolac type epoxy resins and the like can be used.

  Examples of the oxazoline compound that can be used as a carboxyl group-reactive end-blocking agent used in the present invention include 2-methoxy-2-oxazoline, 2-ethoxy-2-oxazoline, 2-propoxy-2-oxazoline, 2-butoxy 2-oxazoline, 2-pentyloxy-2-oxazoline, 2-hexyloxy-2-oxazoline, 2-heptyloxy-2-oxazoline, 2-octyloxy-2-oxazoline, 2-nonyloxy-2-oxazoline, 2 -Decyloxy-2-oxazoline, 2-cyclopentyloxy-2-oxazoline, 2-cyclohexyloxy-2-oxazoline, 2-allyloxy-2-oxazoline, 2-methallyloxy-2-oxazoline, 2-crotyloxy-2-oxazoline , 2-pheno Ci-2-oxazoline, 2-cresyl-2-oxazoline, 2-o-ethylphenoxy-2-oxazoline, 2-o-propylphenoxy-2-oxazoline, 2-o-phenylphenoxy-2-oxazoline, 2-m -Ethylphenoxy-2-oxazoline, 2-m-propylphenoxy-2-oxazoline, 2-p-phenylphenoxy-2-oxazoline, 2-methyl-2-oxazoline, 2-ethyl-2-oxazoline, 2-propyl- 2-oxazoline, 2-butyl-2-oxazoline, 2-pentyl-2-oxazoline, 2-hexyl-2-oxazoline, 2-heptyl-2-oxazoline, 2-octyl-2-oxazoline, 2-nonyl-2- Oxazoline, 2-decyl-2-oxazoline, 2-cyclopentyl-2-oxy Zolin, 2-cyclohexyl-2-oxazoline, 2-allyl-2-oxazoline, 2-methallyl-2-oxazoline, 2-crotyl-2-oxazoline, 2-phenyl-2-oxazoline, 2-o-ethylphenyl-2 -Oxazoline, 2-o-propylphenyl-2-oxazoline, 2-o-phenylphenyl-2-oxazoline, 2-m-ethylphenyl-2-oxazoline, 2-m-propylphenyl-2-oxazoline, 2-p -Phenylphenyl-2-oxazoline, 2,2'-bis (2-oxazoline), 2,2'-bis (4-methyl-2-oxazoline), 2,2'-bis (4,4'-dimethyl- 2-oxazoline), 2,2'-bis (4-ethyl-2-oxazoline), 2,2'-bis (4,4'-diethyl-2-oxy) Sazoline), 2,2'-bis (4-propyl-2-oxazoline), 2,2'-bis (4-butyl-2-oxazoline), 2,2'-bis (4-hexyl-2-oxazoline) 2,2'-bis (4-phenyl-2-oxazoline), 2,2'-bis (4-cyclohexyl-2-oxazoline), 2,2'-bis (4-benzyl-2-oxazoline), 2 , 2'-p-phenylenebis (2-oxazoline), 2,2'-m-phenylenebis (2-oxazoline), 2,2'-o-phenylenebis (2-oxazoline), 2,2'-p -Phenylenebis (4-methyl-2-oxazoline), 2,2'-p-phenylenebis (4,4'-dimethyl-2-oxazoline), 2,2'-m-phenylenebis (4-methyl-2) -Oxazoline), 2, 2 -M-phenylenebis (4,4'-dimethyl-2-oxazoline), 2,2'-ethylenebis (2-oxazoline), 2,2'-tetramethylenebis (2-oxazoline), 2,2'- Hexamethylene bis (2-oxazoline), 2,2'-octamethylene bis (2-oxazoline), 2,2'-decamethylene bis (2-oxazoline), 2,2'-ethylenebis (4-methyl-2) -Oxazoline), 2,2'-tetramethylenebis (4,4'-dimethyl-2-oxazoline), 2,2'-9,9'-diphenoxyethanebis (2-oxazoline), 2,2'- Examples include cyclohexylenebis (2-oxazoline), 2,2'-diphenylenebis (2-oxazoline), and the like. Furthermore, the polyoxazoline compound etc. which contain the above-mentioned compound as a monomer unit can be mentioned.

  Examples of oxazine compounds as carboxyl group-reactive endblockers that can be used in the present invention include 2-methoxy-5,6-dihydro-4H-1,3-oxazine, 2-ethoxy-5,6-dihydro. -4H-1,3-oxazine, 2-propoxy-5,6-dihydro-4H-1,3-oxazine, 2-butoxy-5,6-dihydro-4H-1,3-oxazine, 2-pentyloxy- 5,6-dihydro-4H-1,3-oxazine, 2-hexyloxy-5,6-dihydro-4H-1,3-oxazine, 2-heptyloxy-5,6-dihydro-4H-1,3- Oxazine, 2-octyloxy-5,6-dihydro-4H-1,3-oxazine, 2-nonyloxy-5,6-dihydro-4H-1,3-oxazine, 2-decyloxy-5 6-dihydro-4H-1,3-oxazine, 2-cyclopentyloxy-5,6-dihydro-4H-1,3-oxazine, 2-cyclohexyloxy-5,6-dihydro-4H-1,3-oxazine, 2-allyloxy-5,6-dihydro-4H-1,3-oxazine, 2-methallyloxy-5,6-dihydro-4H-1,3-oxazine, 2-crotyloxy-5,6-dihydro-4H- 1,3-oxazine and the like, and further, 2,2′-bis (5,6-dihydro-4H-1,3-oxazine), 2,2′-methylenebis (5,6-dihydro-4H— 1,3-oxazine), 2,2'-ethylenebis (5,6-dihydro-4H-1,3-oxazine), 2,2'-propylenebis (5,6-dihydro-4H-1,3- Oxazi ), 2,2'-butylenebis (5,6-dihydro-4H-1,3-oxazine), 2,2'-hexamethylenebis (5,6-dihydro-4H-1,3-oxazine), 2, 2'-p-phenylenebis (5,6-dihydro-4H-1,3-oxazine), 2,2'-m-phenylenebis (5,6-dihydro-4H-1,3-oxazine), 2, 2'-naphthylene bis (5,6-dihydro-4H-1,3-oxazine), 2,2'-P, P'-diphenylene bis (5,6-dihydro-4H-1,3-oxazine), etc. Can be mentioned. Furthermore, the polyoxazine compound etc. which contain an above-described compound as a monomer unit are mentioned.

  Among the oxazoline compounds and oxazine compounds, 2,2′-m-phenylenebis (2-oxazoline) and 2,2′-p-phenylenebis (2-oxazoline) are preferable.

  The carbodiimide compound that can be used as a carboxyl group-reactive end-blocking agent in the present invention is a compound having at least one carbodiimide group represented by (—N═C═N—) in the molecule. The organic isocyanate can be heated in the presence of a simple catalyst and produced by a decarboxylation reaction.

  Examples of carbodiimide compounds include diphenylcarbodiimide, di-cyclohexylcarbodiimide, di-2,6-dimethylphenylcarbodiimide, diisopropylcarbodiimide, dioctyldecylcarbodiimide, di-o-toluylcarbodiimide, di-p-toluylcarbodiimide, di-p- Nitrophenylcarbodiimide, di-p-aminophenylcarbodiimide, di-p-hydroxyphenylcarbodiimide, di-p-chlorophenylcarbodiimide, di-o-chlorophenylcarbodiimide, di-3,4-dichlorophenylcarbodiimide, di-2 , 5-dichlorophenylcarbodiimide, p-phenylene-bis-o-toluylcarbodiimide, p-phenylene-bis-dicyclohexylcarbodiimide, p-phenylene- Su-di-p-chlorophenylcarbodiimide, 2,6,2 ', 6'-tetraisopropyldiphenylcarbodiimide, hexamethylene-bis-cyclohexylcarbodiimide, ethylene-bis-diphenylcarbodiimide, ethylene-bis-dicyclohexylcarbodiimide, N , N′-di-o-triylcarbodiimide, N, N′-diphenylcarbodiimide, N, N′-dioctyldecylcarbodiimide, N, N′-di-2,6-dimethylphenylcarbodiimide, N-triyl-N ′ -Cyclohexylcarbodiimide, N, N'-di-2,6-diisopropylphenylcarbodiimide, N, N'-di-2,6-di-tert-butylphenylcarbodiimide, N-toluyl-N'-phenylcarbodiimide, N, N'-di-p-nitrophenyl Carbodiimide, N, N′-di-p-aminophenylcarbodiimide, N, N′-di-p-hydroxyphenylcarbodiimide, N, N′-di-cyclohexylcarbodiimide, N, N′-di-p-toluylcarbodiimide, N, N'-benzylcarbodiimide, N-octadecyl-N'-phenylcarbodiimide, N-benzyl-N'-phenylcarbodiimide, N-octadecyl-N'-tolylcarbodiimide, N-cyclohexyl-N'-tolylcarbodiimide, N- Phenyl-N'-tolylcarbodiimide, N-benzyl-N'-tolylcarbodiimide, N, N'-di-o-ethylphenylcarbodiimide, N, N'-di-p-ethylphenylcarbodiimide, N, N'-di -O-isopropylphenylcarbodiimide, N, N'-di p-isopropylphenylcarbodiimide, N, N'-di-o-isobutylphenylcarbodiimide, N, N'-di-p-isobutylphenylcarbodiimide, N, N'-di-2,6-diethylphenylcarbodiimide, N, N '-Di-2-ethyl-6-isopropylphenylcarbodiimide, N, N'-di-2-isobutyl-6-isopropylphenylcarbodiimide, N, N'-di-2,4,6-trimethylphenylcarbodiimide, N, Mono- or dicarbodiimide compounds such as N'-di-2,4,6-triisopropylphenylcarbodiimide, N, N'-di-2,4,6-triisobutylphenylcarbodiimide, poly (1,6-hexamethylenecarbodiimide) ), Poly (4,4'-methylenebiscyclohexylcarbodiimide), Poly (1,3-cyclohexylenecarbodiimide), poly (1,4-cyclohexylenecarbodiimide), poly (4,4'-diphenylmethanecarbodiimide), poly (3,3'-dimethyl-4,4'-diphenylmethanecarbodiimide) , Poly (naphthylene carbodiimide), poly (p-phenylene carbodiimide), poly (m-phenylene carbodiimide), poly (tolyl carbodiimide), poly (diisopropyl carbodiimide), poly (methyl-diisopropylphenylene carbodiimide), poly (triethylphenylene carbodiimide) ) And polycarbodiimides such as poly (triisopropylphenylenecarbodiimide). Of these, N, N′-di-2,6-diisopropylphenylcarbodiimide, 2,6,2 ′, 6′-tetraisopropyldiphenylcarbodiimide, and polycarbodiimide are preferable.

  As the carboxyl group-reactive end-blocking agent, one or more compounds can be arbitrarily selected and used.

In the resin composition of the present invention, the carboxyl terminal and the acidic low molecular compound may be appropriately blocked according to the use to be used as a molded product, but the specific carboxyl terminal and acidic low molecular compound are blocked. From the viewpoint of hydrolysis resistance, it is preferable to adjust the addition amount so that the acid concentration in the composition is 10 equivalents / 10 ⁶ g or less, and the acid concentration in the composition is adjusted to 5 equivalents / 10 ⁶ g or less. More preferably, it is particularly preferable to adjust to 1 equivalent / 10 ⁶ g or less. The acid concentration in the polymer composition can be measured by dissolving the polymer composition in a suitable solvent and then titrating with an alkali compound solution such as sodium hydroxide having a known concentration, or by NMR.

  0.01-10 weight part is preferable with respect to 100 weight part of biodegradable resin, and, as for the quantity of a carboxyl group reactive terminal blocker, 0.05-5 weight part is more preferable.

  In the present invention, it is preferable to further add a reaction catalyst of a carboxyl group reactive end-blocking agent. The reaction catalyst referred to here is a compound that has an effect of promoting the reaction between the carboxyl group-reactive end-blocking agent and the polymer end or the acidic group of the acidic low-molecular compound, and has the effect of promoting the reaction with a small amount of addition. Certain compounds are preferred. Examples of such compounds include alkali metal compounds, alkaline earth metal compounds, tertiary amine compounds, imidazole compounds, quaternary ammonium salts, phosphine compounds, phosphonium salts, phosphate esters, organic acids, Lewis acids. Specific examples thereof include sodium hydroxide, potassium hydroxide, lithium hydroxide, cesium hydroxide, sodium bicarbonate, potassium bicarbonate, sodium carbonate, potassium carbonate, lithium carbonate, sodium acetate, potassium acetate, lithium acetate, stearin Sodium phosphate, potassium stearate, lithium stearate, sodium borohydride, lithium borohydride, sodium phenyl borohydride, sodium benzoate, potassium benzoate, lithium benzoate, disodium hydrogen phosphate, hydrogen phosphate Dipotassium, Alkali metal compounds such as dilithium hydrogen phosphate, disodium salt of bisphenol A, dipotassium salt, dilithium salt, sodium salt of phenol, potassium salt, lithium salt, cesium salt, calcium hydroxide, water Alkaline earth such as barium oxide, magnesium hydroxide, strontium hydroxide, calcium bicarbonate, barium carbonate, magnesium carbonate, strontium carbonate, calcium acetate, barium acetate, magnesium acetate, strontium acetate, calcium stearate, magnesium stearate, strontium stearate Metal compounds, triethylamine, tributylamine, trihexylamine, triamylamine, triethanolamine, dimethylaminoethanol, triethylenediamine, dimethylphenylamine , Dimethylbenzylamine, 2- (dimethylaminomethyl) phenol, dimethylaniline, pyridine, picoline, tertiary amines such as 1,8-diazabicyclo (5,4,0) undecene-7, 2-methylimidazole, 2-ethyl Imidazole, 2-isopropylimidazole, 2-ethyl-4-methylimidazole, imidazole compounds such as 4-phenyl-2-methylimidazole, tetramethylammonium chloride, tetraethylammonium chloride, tetrabutylammonium bromide, trimethylbenzylammonium chloride, triethylbenzyl Quaternary ammonium salts such as ammonium chloride, tripropylbenzylammonium chloride, N-methylpyridinium chloride, trimethylphosphine, Phosphine compounds such as triethylphosphine, tributylphosphine, trioctylphosphine, phosphonium salts such as tetramethylphosphonium bromide, tetrabutylphosphonium bromide, tetraphenylphosphonium bromide, ethyltriphenylphosphonium bromide, triphenylbenzylphosphonium bromide, trimethyl phosphate, triethyl phosphate , Tributyl phosphate, trioctyl phosphate, tributoxyethyl phosphate, triphenyl phosphate, tricresyl phosphate, trixylenyl phosphate, cresyl diphenyl phosphate, octyl diphenyl phosphate, tri (p-hydroxy) phenyl phosphate, tri (p-methoxy ) Phenyl phosphate Phosphoric acid esters, oxalic acid, p-toluenesulfonic acid, dinonylnaphthalenedisulfonic acid, organic acids such as dodecylbenzenesulfonic acid, Lewis acids such as boron trifluoride, aluminum tetrachloride, titanium tetrachloride, tin tetrachloride, etc. These may be used alone or in combination of two or more. Among these, it is preferable to use an alkali metal compound, an alkaline earth metal compound, and a phosphate ester, and particularly an alkali metal or an organic salt of an alkaline earth metal can be preferably used. Particularly preferred compounds are sodium stearate, potassium stearate, calcium stearate, magnesium stearate, sodium benzoate, sodium acetate, potassium acetate, calcium acetate and magnesium acetate. Further, an organic salt of an alkali metal or alkaline earth metal having 6 or more carbon atoms is preferable, and it is preferable to use one or more of sodium stearate, potassium stearate, calcium stearate, magnesium stearate, and sodium benzoate.

  The addition amount of the reaction catalyst is not particularly limited, but is preferably 0.001 to 1 part by weight and more preferably 0.01 to 0.1 part by weight when the biodegradable resin is 100 parts by weight. More preferably, 0.02 to 0.1 parts by weight is most preferable.

  In this invention, it is preferable to mix | blend a foaming agent from the point that light weight, heat resistance, and a mechanical characteristic are easy to improve. As the foaming agent, a chemical foaming agent, a physical foaming agent, or the like can be used, but a chemical foaming agent is preferable in terms of easy control of the foaming ratio and bubbles.

  Chemical foaming agents include azo compounds such as azodicarbonamide, azobisisobutyronitrile, barium azodicarboxylate, hydrazide compounds such as 4,4′-oxybisbenzenesulfonyl hydrazide, p-toluenesulfonyl hydrazide, and dinitrosopenta. Nitroso compounds such as methylenetetramine, hydrazo compounds such as hydrazodicarbonamide, 5-phenyltetrazole, 5-aminotetrazole, azobistetrazole, bistetrazole and other tetrazole compounds, hydrazodicarboxylic acid esters, azodicarboxylic acid esters, Examples thereof include ester compounds such as citric acid esters, isocyanate compounds, sodium bicarbonate, sodium carbonate, and the like, and azodicarbonamide and azobis Preferred are azo compounds such as butyronitrile and barium azodicarboxylate, tetrazole compounds such as 5-phenyltetrazole, 5-aminotetrazole, azobistetrazole, and bistetrazole, and isocyanate compounds, and azodicarbonamide and azobisisobutyridine. Azo compounds such as nitrile and barium azodicarboxylate are more preferred, and azodicarbonamide is more preferred.

  Physical foaming agents include ethane, butane, pentane, hexane, heptane, ethylene, propylene, petroleum ether, methyl chloride, monochlorotrifluoromethane, dichlorodifluoromethane, dichlorotetrafluoroethane, water, air, carbon dioxide, nitrogen gas Butane, pentane, hexane, water, air, carbon dioxide gas, nitrogen gas are preferred, water, air, carbon dioxide gas, nitrogen gas are more preferred, water, air, Carbon dioxide gas is more preferable. In addition, it is preferable to use a substance that can be used as a supercritical fluid, such as carbon dioxide gas or nitrogen gas, as a foaming agent in a supercritical fluid state because a foam that does not decrease in strength can be obtained.

  The blending amount of the foaming agent is preferably 0.01 to 30 parts by weight, more preferably 0.1 to 15 parts by weight, with respect to 100 parts by weight of the biodegradable resin, More preferably, it is 10 parts by weight.

  Moreover, it is preferable to mix | blend a foaming adjuvant by the point that a foaming behavior is stabilized and a foaming magnification, a foam density, and a bubble size become easy to control. Foaming aids include metal oxides such as zinc oxide, calcium oxide, and aluminum oxide, and aliphatic salts such as zinc stearate, calcium stearate, magnesium stearate, aluminum stearate, calcium montanate, magnesium montanate, and aluminum montanate. , Paraffin, alumina, talc, calcium carbonate, mica, silica, kaolin and the like.

  The blending amount of the foaming aid is preferably 0.01 to 10 parts by weight, more preferably 0.05 to 5 parts by weight, with respect to 100 parts by weight of the biodegradable resin, More preferably, it is 1 part by weight.

  In this invention, it is preferable to mix | blend a flame retardant with the point that a flame retardance can be provided. In the present invention, the flame retardant is not particularly limited as long as it is a substance added for the purpose of imparting flame retardancy to the resin, and a known one can be used. Specific examples include brominated flame retardants, chlorine-based flame retardants, phosphorus-based flame retardants, nitrogen compound-based flame retardants, silicone-based flame retardants, and other inorganic flame retardants. It can be used by 1 type (s) or 2 or more types. The flame retardant is preferably a flame retardant having a low environmental impact. Environment-friendly flame retardants include those that are biodegradable, those that do not generate toxic gases during incineration, those that are derived from non-petroleum raw materials such as plant resources, or natural raw materials. Flame retardants, nitrogen compound flame retardants, silicone flame retardants, and other inorganic flame retardants are preferred.

  The blending amount of the flame retardant is 0.01 to 100 parts by weight, more preferably 0.5 to 90 parts by weight, and further preferably 1 to 80 parts by weight with respect to 100 parts by weight of the biodegradable resin.

  Among the above flame retardants, it is preferable to use at least one selected from phosphorus flame retardants, nitrogen compound flame retardants, silicone flame retardants, and other inorganic flame retardants. Phosphorus flame retardants, nitrogen compound flame retardants It is more preferable to use a combination of at least two selected from flame retardants, silicone flame retardants and other inorganic flame retardants.

  When using a phosphorus-based flame retardant and a nitrogen compound-based flame retardant in combination, the phosphorus-based flame retardant includes at least one of phosphoric acid ester, condensed phosphoric acid ester, polyphosphate, and red phosphorus, especially condensed phosphorus. Any one or more of acid esters and polyphosphates are preferred, and more preferably biodegradable. Further, it is more preferable to use a condensed phosphate ester and a nitrogen compound-based flame retardant together, or it is more preferable to use a polyphosphate and a nitrogen compound-based flame retardant together. It is preferable to use a small amount because of its high flame retardant effect. The condensed phosphate ester is preferably an aromatic condensed phosphate ester, preferably resorcinol polyphenyl phosphate, resorcinol poly (di-2,6-xylyl) phosphate, and resorcinol poly (di-2,6-xylyl) phosphate. As a commercially available example, PX-200 manufactured by Daihachi Chemicals may be mentioned. The nitrogen compound flame retardant is preferably a triazine compound, and more preferably melamine cyanurate. A silicone resin is preferable as the silicone flame retardant used in combination with the phosphorus flame retardant. Further, as the other inorganic flame retardant used in combination with the phosphorus flame retardant, zinc borate or swellable graphite is preferable.

  When a phosphorus flame retardant and a nitrogen compound flame retardant, a silicone flame retardant, or other inorganic flame retardant are used in combination, a nitrogen compound flame retardant, a silicone flame retardant, or the like with respect to 100 parts by weight of the phosphorus flame retardant It is preferable to use 1 to 100 parts by weight of the inorganic flame retardant.

  In the present invention, it is preferable to further add an antistatic agent in terms of imparting antistatic properties. Any known antistatic agent can be used in the present invention.

  In the antistatic agent of the present invention, its ionicity is not particularly limited, and any of cationic, anionic, zwitterionic and nonionic may be used, but the thermal decomposition of the polylactic acid resin is suppressed. In terms of being able to be made, zwitterionic and nonionic systems are preferable, and nonionic systems are more preferable. Furthermore, it is preferable that the antistatic agent is biodegradable. Examples of such include Riken Master GSR-350 made by Riken Vitamin.

The blending amount of the antistatic agent is preferably 0.1 to 10 parts by weight, and more preferably 0.5 to 5 parts by weight with respect to 100 parts by weight of the biodegradable resin .
In terms of heat resistance, the resin composition of the present invention is a deflection of a load obtained by measuring a molded article comprising the resin composition under conditions of a load of 0.45 MPa and a heating rate of 120 ° C./min according to ASTM method D648. The temperature is preferably 80 ° C. or higher, more preferably 90 ° C. or higher, further preferably 100 ° C. or higher, particularly preferably 110 ° C. or higher, and most preferably 125 ° C. or higher. preferable. The resin composition satisfying the above-mentioned deflection temperature under load can be obtained by using an appropriate biodegradable resin and paper powder satisfying the requirements defined in the present invention and applying an optimum manufacturing method and molding method.

The method for producing the resin composition of the present invention is not particularly limited. For example, after pre-blending a biodegradable resin, paper powder, and other additives as necessary, at a melting point or higher, uniaxial Or the method of melt-kneading uniformly with a twin-screw extruder, the method of removing a solvent after mixing in a solution, etc. are used preferably.

  The melt kneading temperature (cylinder temperature) at the time of producing the resin composition of the present invention is preferably 50 to 240 ° C, more preferably 100 ° C to 230 ° C, and particularly preferably 120 to 220 ° C. When the melt-kneading temperature (cylinder temperature) is less than 50 ° C., the biodegradable resin tends to be difficult to melt, and when the melt-kneading temperature (cylinder temperature) exceeds 240 ° C., it tends to cause burning.

  The resin composition of the present invention can be processed and used for various molded products by a general thermoplastic resin molding method, for example, injection molding, extrusion molding, blow molding, press molding, or the like.

  In the present invention, when a mold is used at the time of molding, the mold temperature is not particularly limited, but is preferably 20 ° C. to 140 ° C., and preferably 30 ° C. to 120 ° C. from the viewpoint of mechanical properties, moldability or productivity. ° C is more preferable, 35 ° C to 110 ° C is more preferable, and 40 ° C to 90 ° C is particularly preferable. If the mold temperature is less than 20 ° C, it tends to be difficult to control the mold temperature, and if the mold temperature exceeds 140 ° C, the test piece is easily deformed and it is difficult to obtain a good molded product. It tends to be easy.

  Examples of the molded product made of the resin composition of the present invention include injection molded products, extrusion molded products, press molded products, blow molded products, and the like, board-shaped, sheet-shaped, film-shaped, plate-shaped, rod-shaped, columnar, box It can be used in various shapes such as shapes, lumps, tubes, fibers, granules, and other complicated shapes.

  In addition, the molded product made of the resin composition of the present invention includes automobile parts (interior / exterior parts, etc.), electrical / electronic parts (various housings, gears, gears, etc.), building materials, civil engineering materials, furniture members, agricultural materials, games. It can be used for various purposes such as machine materials, tableware, sports materials, musical instruments and daily necessities.

  Specifically, automotive parts include air flow meters, air pumps, thermostat housings, engine mounts, ignition hobbins, ignition cases, clutch bobbins, sensor housings, idle speed control valves, vacuum switching valves, ECU housings, vacuum pump cases, inhibitors Switch, rotation sensor, acceleration sensor, distributor cap, coil base, ABS actuator case, radiator tank top and bottom, cooling fan, fan shroud, engine cover, cylinder head cover, oil cap, oil pan, oil filter, fuel cap , Fuel strainer, distributor cap, vapor Nister housing, air cleaner housing, timing belt cover, brake booster parts, various cases, various tubes, various tanks, various hoses, various clips, various valves, various pipes such as automotive underhood parts, torque control lever, safety belt Parts, register blade, washer lever, window regulator handle, knob of window regulator handle, passing light lever, sun visor bracket, door trim, door pocket, column cover, cowl side, footrest deck trim, front pillar, center pillar, front scuff, Rear scuff, door cuff, front outside, rear outside, seat side, roof side, striker, striker Automotive interior parts such as tire covers, air conditioner cases, cassette deck cases, various motor housings, roof rails, fenders, garnishes, bumpers, door mirror stays, spoilers, hood louvers, wheel covers, wheel caps, grill apron cover frames, lamp reflectors Various automotive connectors such as automotive exterior parts such as lamp bezels and door handles, wire harness connectors, SMJ connectors, PCB connectors, and door grommet connectors. Electrical and electronic components include notebook PC housings and internal parts, CRT display housings and internal parts, printer housings and internal parts, mobile terminal housings and internal parts such as mobile phones, mobile PCs, handheld mobiles, recording media (CD, DVD, PD, FDD, etc.) Drive housing and internal parts, copier housing and internal parts, facsimile housing and internal parts, parabolic antenna parts, VTR parts, TV parts, irons, hair dryers, rice cooker parts, electronics Audio equipment parts such as range parts, acoustic parts, video cameras, audio / laser discs (registered trademark) / compact discs, lighting parts, refrigerator parts, air conditioner parts, typewriter parts, word processors -Housing, internal parts such as parts, electronic musical instruments, home game machines, portable game machines, various gears, various cases, sensors, LEP lamps, connectors, sockets, resistors, relay cases, motor cases, switches, capacitors, Variable capacitor case, optical pickup, oscillator, various terminal boards, transformer, plug, printed wiring board, tuner, speaker, microphone, headphones, small motor, magnetic head base, power module, semiconductor, liquid crystal, FDD carriage, FDD chassis, Examples include a motor brush holder, a transformer member, and a coil bobbin. Building materials include sash doors, blind curtain parts, piping joints, curtain liners, blind parts, gas meter parts, water meter parts, water heater parts, roof panels, heat insulation walls, adjusters, plastic bundles, ceiling hanger, stairs, doors, floors Materials, ceiling materials, pillars, foundations, beams, baseboards, window frames, doors, deck materials, etc. Civil engineering materials include vegetation nets, vegetation mats, grass protection bags, grass protection nets, curing sheets, slope protection sheets, fly ash holding sheets, drain sheets, water retention sheets, sludge / sludge dewatering bags, concrete formwork, scaffolding boards , Sheet piles, and piles. Examples of furniture members include a chest, a desk, a chair, and various shelves. Examples of the material for the gaming machine include pachinko parts such as a pachinko machine gauge board and a frame material, and parts such as a mahjong table and a billiard table. Others include fishing lines, fishing nets, seaweed aquaculture nets, fishing bait, sea bream-related materials, gears, screws, springs, bearings, levers, key stems, cams, ratchets, rollers, water supply parts, toy parts, fans, pipes, Cleaning jigs, motor parts, microscopes, binoculars, cameras, clocks and other mechanical parts, multi-films, tunnel films, bird-proof sheets, vegetation protection nonwovens, seedling pots, vegetation piles, seed string tape, germination sheets, House lining sheets, agricultural PVC film stoppers, slow-release fertilizers, root-proof sheets, horticultural nets, insect nets, young tree nets, printed laminates, fertilizer bags, sample bags, sandbags, animal damage prevention nets, incentives Agricultural materials such as strings, windproof nets, disposable diapers, sanitary wrapping materials, cotton swabs, wet towels, toilet seat wipes, etc., medical non-woven fabrics (stitching reinforcements, anti-adhesion membranes, artificial devices) Repair material), wound dressing material, wound tape bandage, sticking material base fabric, surgical suture, fracture reinforcement, artificial organ, medical film, medical supplies, tray, knife, fork, spoon, tube, plastic can, Blisters, pouches, pallets, containers, tableware such as containers, tanks, baskets, polo shirts, T-shirts, innerwear, uniforms, sweaters, socks, ties, and other clothing, curtains, chairs, carpets, tablecloths, and futons Interior materials such as wallpaper, furoshiki, various sports materials such as golf tees, golf clubs, tennis rackets, hot melt binders such as paper, leather, nonwoven fabric, magnetic materials, zinc sulfide, powder binders such as electrode materials, hot Fill containers, microwave cooking containers, cosmetic containers, wraps, foam buffers, paper Mi, shampoo bottle, beverage bottle, cup, candy packaging, shrink label, lid material, fruit basket, hand tape, easy peel packaging, egg pack, HDD packaging, compost bag, recording media packaging, shopping bag, musical instrument, Carrier tape, print lamination, heat sensitive stencil printing film, release film, porous film, container bag, credit card, cash card, ID card, IC card, optical element, conductive embossed tape, IC tray, garbage bag, cash register Bag, drainer net, body towel, hand towel, tea pack, drain filter, coat agent, adhesive, bag, toothbrush, stationery, clear file, cooler box, kumade, hose reel, planter, hose nozzle, pen cap, gas As a lighter Useful.

EXAMPLES Next, although an Example demonstrates this invention further in detail, these do not limit this invention. All the parts in the examples are based on weight. Moreover, the raw material used and the code | symbol in a table | surface are shown below.
(A) Biodegradable resin (A-1) Polyhydroxybutyrate (Biogreen manufactured by Mitsubishi Gas Chemical)
(A-2) Polybutylene succinate (Bionor # 1001 made by Showa Polymer)
(A-3) Polybutylene succinate / adipate (Showa Polymer Bionore # 3001)
(A-4) Modified polyethylene terephthalate (DuPont Biomax)
(B) Paper dust (B-1) Paperboard ground paper powder a obtained by pulverizing 1 mm thick paperboard a
(B-2) Paperboard pulverized paper powder b obtained by pulverizing a paperboard having a thickness of 0.5 mm
(B-3) Copy paper ground paper powder having a fiber length distribution range of 0.05 to 5 mm (B-4) Virgin pulp ground paper powder having a fiber length distribution range of 0.05 to 5 mm (B-5) Reference Paper powder obtained by the method of Example 1

[Reference Example 1]
Using bleached pulp without using chlorine gas, calcium carbonate (Optama Kogyo TP121) with an ash content of 5% by weight, neutral rosin sizing agent (Japan PMC CC-167) with 0.4% by weight of pulp, liquid Two base papers were made with a stock containing 2% by weight of band, 1% by weight of cationic starch (Kate 308 manufactured by Nippon MSC) and 500 ppm of colloidal silica (BMA-0 manufactured by Nippon Eka Chemicals) as a retention agent. In a roll size press, 1% by weight of starch (MS4600 manufactured by Nippon Food Processing Co., Ltd.), 0.1% by weight of surface sizing agent (Polymaron 1343 manufactured by Arakawa Chemical Co., Ltd.), and a lithium salt of polystyrene sulfonic acid copolymer as a conductive agent ( NPSA VERSA TL-YE910) 1.0% by weight was used to make a high-grade printing paper, and the resulting paper was powdered The powder was pulverized with a crusher (CS cutter made by CONDUX) to obtain 100-mesh pass paper powder.

[Examples 1-7, Comparative Examples 1-8]
Biodegradable resin and paper powder were mixed in the proportions shown in Table 1, and melt kneaded under the conditions shown in Table 1 using a 30 mm diameter twin screw extruder to obtain pellets of the resin composition.

  Moreover, the obtained resin composition was injection molded under the conditions shown in Table 1 using an injection molding machine to obtain ASTM test pieces (tensile test pieces and bending test pieces) having a thickness of 3 mm.

  Using the tensile test piece obtained above, the tensile test was performed according to ASTM method D638, and the bending deflection temperature was applied according to ASTM method D648 using a bending test piece (load 0.45 MPa, heating rate 120 ° C./min). Was measured. These results are shown in Table 1.

For the paper dust used in the examples and comparative examples, the chlorine content was determined by coulometric titration, and the sulfur content was determined by ultraviolet fluorescence. The analysis results are shown in Table 2.

Further, the paper dust used in the examples and comparative examples was treated in an electric furnace at 450 ° C. for 12 hours to determine the ash content. The results are shown in Table 3.

  Further, the paperboard crushed paper powder a (B-1), paperboard crushed paper powder b (B-2), copy paper crushed paper powder (B-3) and the method of Reference Example 1 used in Examples and Comparative Examples were obtained. The abundance ratio of aluminum, silicon and calcium was determined using an X-ray fluorescence apparatus using the ash content of the paper dust (B-5) obtained. The analysis results are shown in Table 4.

From the results of Tables 1 to 4, the resin composition using the paper powder in which the chlorine content and the sulfur content of the present invention are in a specific range amount and the amount of aluminum is larger than the amount of calcium is It can be seen that the mechanical properties are excellent.

Claims (4)

Biodegradable resin and chlorine content excluding polylactic acid resin is 150ppm or more, 1000 ppm or less, sulfur content 200ppm or more and rather multi than the amount of the amount of aluminum calcium, ash content 8% by weight or more paper A resin composition obtained by blending powder. The resin composition according to claim 1, wherein the sulfur content of the paper powder is 2000 ppm or less. The resin composition according to claim 1 or 2, wherein 10 to 150 parts by weight of the paper powder is blended with 100 parts by weight of the biodegradable resin excluding the polylactic acid resin. A molded article comprising the resin composition according to any one of claims 1 to 3.