WO2022215741A1 - 難燃性樹脂組成物及び難燃性樹脂成形体 - Google Patents
難燃性樹脂組成物及び難燃性樹脂成形体 Download PDFInfo
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- WO2022215741A1 WO2022215741A1 PCT/JP2022/017317 JP2022017317W WO2022215741A1 WO 2022215741 A1 WO2022215741 A1 WO 2022215741A1 JP 2022017317 W JP2022017317 W JP 2022017317W WO 2022215741 A1 WO2022215741 A1 WO 2022215741A1
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- Prior art keywords
- flame
- mass
- resin composition
- retardant
- styrene
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- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract description 76
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- GDVKFRBCXAPAQJ-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O GDVKFRBCXAPAQJ-UHFFFAOYSA-A 0.000 claims description 13
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/15—Heterocyclic compounds having oxygen in the ring
- C08K5/151—Heterocyclic compounds having oxygen in the ring having one oxygen atom in the ring
- C08K5/1515—Three-membered rings
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/04—Homopolymers or copolymers of styrene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/18—Homopolymers or copolymers of aromatic monomers containing elements other than carbon and hydrogen
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L51/04—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to rubbers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/06—Copolymers with styrene
Definitions
- the present invention relates to a flame-retardant resin composition containing a styrenic resin and a brominated polymer flame retardant, and a flame-retardant resin molded product using the flame-retardant resin composition.
- Hexabromocyclododecane has been generally used as a flame retardant for imparting flame retardancy to styrenic resin molded articles. Brominated polymer-type flame retardants are being investigated as alternatives because they are toxic and difficult to decompose (see Patent Document 1).
- the brominated polymer type flame retardant has insufficient thermal stability.
- thermal deterioration may occur, resulting in black foreign matter or discoloration, which may impair the appearance of the molded product.
- Patent Document 2 discloses a technique of adding an alkyl phosphite or an epoxy compound as a stabilizer when mixing a brominated polymer flame retardant with a resin.
- a flame-retardant resin composition in which both the occurrence of black foreign matter and the occurrence of discoloration are prevented can be obtained, and when a molded article is molded using this flame-retardant resin composition, the flame-retardant resin composition has excellent appearance.
- the present inventors previously proposed a method containing an epoxy compound and a halogen scavenger and having a bromine content of 18% by mass or more and 42% by mass or less (Patent Reference 3).
- the flame-retardant resin composition of Patent Document 3 has the advantage of preventing both black foreign matter and discoloration. There remains the problem of eye discharge caused by resin decomposition products, resin scorching, undispersed additives, etc. at the die exit portion of the extruder during the production of the flame-retardant resin composition.
- An object of the present invention is to provide a flame-retardant resin composition containing a styrene resin and a brominated polymer-type flame retardant, and a flame-retardant resin molded product that solves these problems.
- the first aspect of the present invention contains a styrene resin, a brominated polymer flame retardant, an epoxy compound, a halogen scavenger, and an antioxidant, and has a bromine content of 18% by mass or more and 42% by mass or less.
- a flame-retardant resin composition of The styrene resin has a melt viscosity of 5.5 or more and 9.5, where M1 is the melt viscosity at 200 ° C. and a shear rate of 6.1 sec -1 and M2 is the melt viscosity at 200 ° C. and a shear rate of 243 sec -1 .
- a flame-retardant resin composition characterized by containing 0.1 parts by mass or more and 3 parts by mass or less of a polyolefin wax with respect to 100 parts by mass of the total amount of the styrene resin and the brominated polymer flame retardant. It is a thing.
- the flame-retardant resin composition of the present invention includes the following configurations as preferred embodiments. 5 parts by mass or more and 22 parts by mass or less of the epoxy compound and 1 part by mass or more and 10 parts by mass or less of the halogen scavenger with respect to 100 parts by mass of the total amount of the styrene resin and the brominated polymer flame retardant;
- the antioxidant is contained in an amount of 2 parts by mass or more and 10 parts by mass or less.
- the brominated polymer flame retardant is (a) a copolymer having butadiene and a vinyl aromatic hydrocarbon as monomer components, (b) the content of the vinyl aromatic hydrocarbon monomer in the copolymer before bromination is 5% by mass or more and 90% by mass or less; (c) containing 1,2-butadiene in butadiene; (d) weight average molecular weight (Mw) is 1000 or more, (e) an unbrominated non-aromatic double bond content by 1 H-NMR spectroscopy is less than 50% based on the non-aromatic double bond content of the copolymer before bromination; (f) The 5% weight loss temperature by thermogravimetric analysis (TGA) is 200°C or higher.
- TGA thermogravimetric analysis
- a second aspect of the present invention is a flame-retardant resin molded article comprising the flame-retardant resin composition of the first aspect of the present invention.
- the third aspect of the present invention is a flame-retardant resin molded article comprising the flame-retardant resin composition of the first aspect of the present invention and a further styrene resin.
- the melt viscosity ratio of the styrene resin is specified, and in addition to the epoxy compound, the halogen scavenger and the antioxidant,
- a polyolefin wax as a stabilizer for brominated polymer flame retardants, it is possible to suppress the occurrence of eye grease caused by resin decomposition products, resin burns, undispersed additives, etc. at the die outlet of the extruder during production.
- a flame retardant resin composition is provided in which the thermal stability of the brominated polymeric flame retardant is improved. Therefore, the flame-retardant resin composition of the present invention suppresses the occurrence of discoloration when molding a molded article, and provides a flame-retardant resin molded article excellent in appearance.
- the flame-retardant resin composition of the present invention (hereinafter referred to as "resin composition”) is a resin composition obtained by blending a brominated polymer-type flame retardant as a flame retardant in a styrene-based resin, wherein the styrene-based Characterized by specifying the melt viscosity ratio of the resin and further using polyolefin wax, an epoxy compound, a halogen scavenger, and an antioxidant in combination to suppress the occurrence of eye mucus and improve thermal stability. .
- the flame-retardant resin molded article of the present invention is obtained by molding using the resin composition.
- first molded article a flame-retardant resin molded article molded using the resin composition of the present invention as it is (hereinafter referred to as "first molded article"), or the resin of the present invention
- second molded article Any flame-retardant resin molded article obtained by further adding a styrene-based resin to the composition to adjust the bromine content to a lower level may be used.
- Styrene-based resins used in the resin composition of the present invention include homopolymers of styrene, copolymers of styrene and copolymerizable monomers, and styrene-based resins obtained by reinforcing these with rubber.
- polystyrene rubber-reinforced polystyrene (HIPS), acrylonitrile-styrene copolymer resin (AS), acrylonitrile-butadiene-styrene copolymer resin (ABS), acrylonitrile-acrylic rubber-styrene copolymer resin (AAS), acrylonitrile-ethylene propylene Rubber-styrene copolymer resin, acrylonitrile-chlorinated polyethylene-styrene copolymer resin, styrene-butadiene copolymer resin, and the like.
- HIPS rubber-reinforced polystyrene
- AS acrylonitrile-styrene copolymer resin
- ABS acrylonitrile-butadiene-styrene copolymer resin
- AS acrylonitrile-acrylic rubber-styrene copolymer resin
- AS acrylonitrile-ethylene propylene Rubber
- the styrene resin used in the present invention has a melt viscosity ratio (M1/M2) where M1 is the melt viscosity at 200° C. and a shear rate of 6.1 sec ⁇ 1 and M2 is the melt viscosity at 200° C. and 243 sec ⁇ 1 . It is 5.5 or more and 9.5 or less, preferably 7 or more and 9 or less.
- M1/M2 melt viscosity ratio
- the weight average molecular weight (Mw) of the styrene resin is preferably 160,000 or more and 300,000 or less.
- melt viscosity M2 of the styrene-based resin at 200° C. and a shear rate of 243 sec ⁇ 1 is preferably 300 Pa ⁇ s or more and 660 Pa ⁇ s or less. Within such a range, it is possible to more effectively suppress the occurrence of eye mucus caused by resin decomposition products, resin scorching, undispersed additives, etc. at the die outlet portion of the extruder during production.
- the brominated polymer type flame retardant used in the present invention is conventionally known, and those disclosed in Patent Documents 1 to 3 can be used as they are.
- a brominated copolymer having the following characteristics (a) to (f) is preferably used.
- (b) The content of the vinyl aromatic hydrocarbon monomer in the copolymer before bromination is 5% by mass or more and 90% by mass or less.
- (c) Contains 1,2-butadiene in butadiene.
- Weight average molecular weight (Mw) is 1000 or more.
- the unbrominated non-aromatic double bond content by 1 H-NMR spectroscopy is less than 50% based on the non-aromatic double bond content of the copolymer before bromination.
- the 5% weight loss temperature by thermogravimetric analysis (TGA) is 200°C or higher.
- brominated styrene/butadiene block copolymers brominated styrene/butadiene random copolymers, brominated styrene/ A butadiene graft copolymer etc. are mentioned.
- Brominated styrene/butadiene block copolymers are particularly preferred, and specific examples include commercially available products such as Chemtura's "EMERALD INNOVATION 3000" and ICL's "FR122P".
- the addition amount of the brominated polymer flame retardant is adjusted so that the bromine content in the resin composition is 18% by mass or more and 42% by mass or less.
- the polyolefin wax used in the present invention is a low-molecular-weight polyolefin having an olefin as a basic structural unit and a weight average molecular weight of 500 or more and 10,000 or less.
- Vinyl acetate copolymer wax, polyolefin ionomer wax, and the like can be mentioned. These may be used singly or in combination of two or more.
- Polyethylene wax and oxidized polyethylene wax are preferable, and for example, the product name "Visco Wax 115" (Innospec Leuna GmbH, polyethylene wax) and the product name "LICOWAX PED521" having a weight average molecular weight of about 3000 or more and 4000 or less.
- the amount of the polyolefin wax added is 0.1 parts by mass or more and 3 parts by mass or less, preferably 0.5 parts by mass or more with respect to 100 parts by mass of the total amount of the styrene resin and the brominated polymer flame retardant. It is 2 parts by mass or less.
- the strand can be extruded well from the extruder during production, and the occurrence of eye mucus caused by resin decomposition products, resin scorch, undispersed additives, etc. at the die exit part of the extruder can be suppressed. can be done.
- Epoxy compounds used in the present invention include, for example, cresol novolak-type epoxy resins, phenol novolac-type epoxy resins, epoxidized vegetable oils, etc. These can be used alone or in combination of two or more. Among them, cresol novolac type epoxy resin and epoxidized soybean oil are preferable.
- the amount of the epoxy compound added is preferably 5 parts by mass or more and 22 parts by mass or less with respect to 100 parts by mass of the total amount of the styrene resin and the brominated polymer flame retardant.
- the thermal stability of the brominated polymer flame retardant is favorably improved, and in the resin composition, the first molded article using the resin composition, and the second molded article, the brominated polymer
- the thermal stability of the brominated polymer flame retardant is favorably improved, and in the resin composition, the first molded article using the resin composition, and the second molded article, the brominated polymer
- the generation of black foreign matter due to thermal deterioration of the mold flame retardant is effectively reduced, and a molded article having good molding processability and excellent appearance can be obtained. More preferably, it is 10 parts by mass or more and 20 parts by mass or less.
- the halogen scavenger used in the present invention is a component that scavenges free halogens produced during the process from the manufacturing process of the resin composition to obtaining the first molded article or the second molded article.
- examples thereof include magnesium carbonate compounds (dolomite-based compounds, hydrotalcite-based compounds, etc.), magnesium perchlorate compounds, aluminosilicate compounds (zeolite, etc.), organic tin compounds, and the like. Among them, dolomite-based compounds and hydrotalcite-based compounds are preferred.
- the dolomite compound is CaMg(CO 3 ) 2 or a compound containing it, and the hydrotalcite compound is a naturally occurring compound represented by Mg 6 Al 2 (OH) 16 CO 3 ⁇ nH 2 O. It is a kind of clay mineral.
- halogen scavengers may be used alone or in combination of two or more.
- the amount of the halogen scavenger to be added is preferably 1 part by mass or more and 10 parts by mass or less with respect to 100 parts by mass of the total amount of the styrene resin and the brominated polymer flame retardant.
- the thermal stability of the brominated polymer flame retardant is favorably improved, and in the resin composition, the first molded article using the resin composition, and the second molded article, the brominated polymer The generation of black foreign matter due to thermal deterioration of the mold flame retardant is effectively reduced, and a molded article having good molding processability and excellent appearance can be obtained. It is more preferably 4 parts by mass or more and 8 parts by mass or less.
- the thermal stability of is improved well, and in the resin composition, the first molded article using the resin composition, and the second molded article, the occurrence of discoloration due to thermal deterioration of the brominated polymer flame retardant is effective. It is effectively prevented, and a molded product having an excellent appearance can be obtained. More preferably, the ratio of dolomite-based compound/hydrotalcite-based compound is 20/80 or more and 80/20 or less.
- a magnesium perchlorate compound, an aluminosilicate compound (such as zeolite), an organic tin compound, etc. may also be used in addition to these compounds.
- a magnesium perchlorate compound such as zeolite
- an organic tin compound such as zeolite
- the amount of the antioxidant to be added is preferably 2 parts by mass or more and 10 parts by mass or less with respect to 100 parts by mass of the total amount of the styrene resin and the brominated polymer flame retardant.
- the thermal stability of the brominated polymer flame retardant in the resin composition is improved, and in the first molded body and the second molded body, black foreign matter due to thermal deterioration of the brominated polymer flame retardant can be effectively prevented from occurring and discoloration can be effectively suppressed, so that a molded product with excellent appearance can be obtained.
- Antioxidants used in the present invention include phenol antioxidants, sulfur antioxidants, phosphorus antioxidants (excluding alkylphosphite antioxidants), and the like. Antioxidants (excluding alkylphosphites) are preferred.
- phenolic antioxidants hindered phenolic antioxidants are more preferred, such as octadecyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, ethylenebis(oxyethylene)bis [3-(5-tert-butyl-4-hydroxy-m-tolyl)propionate], 4,6-bis(octylthiomethyl)-o-cresol, 4,6-bis[(dodecylthio)methyl]-o- Cresol, 2,4-dimethyl-6-(1-methylpentadecyl)phenol, tetrakis[methylene-3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate]methane, DL- ⁇
- a hindered phenol-based antioxidant and a phosphorus-based antioxidant (excluding alkyl phosphite-based antioxidants).
- the thermal stability of the flame retardant is further improved, and the resin composition, the first molded article using the resin composition, and the second molded article are free from discoloration due to thermal deterioration of the brominated polymer flame retardant. The occurrence is effectively prevented, and a molded article having an excellent appearance can be obtained.
- additives can be added to the resin composition of the present invention within a range that does not impair the effects of the present invention.
- lubricants such as fatty acid-based lubricants, aliphatic amide-based lubricants, and metal soap-based lubricants
- fillers such as talc, mica, and silica
- reinforcing agents such as glass fibers
- coloring agents such as pigments and dyes
- Antistatic agents such as flame retardant aids, nonionic surfactants, and cationic surfactants.
- the resin composition of the present invention comprises a specific styrenic resin, a brominated polymer flame retardant, a polyolefin wax, an epoxy compound, a halogen scavenger, and an antioxidant, which are pre-blended by a known mixing technique. After that, it can be produced by melt-kneading.
- a mixing apparatus such as a mixer type mixer, a V type blender, and a tumbler type mixer can be used.
- the melt-kneading method is not particularly limited, and known melting techniques can be applied.
- a suitable melt-kneading apparatus used for such melt-kneading includes a single-screw extruder, a special single-screw extruder, a twin-screw extruder, and the like, preferably a twin-screw extruder.
- the resin composition of the present invention may be used by itself to form the first molded article, but the resin composition of the present invention may be further added with a styrene resin (second styrene resin) to obtain a more It is also possible to mold a second molding with a low bromine content, and in this case also the thermal stability of the brominated polymer flame retardant is well maintained, the occurrence of black foreign matter and discoloration is suppressed or prevented, and the appearance is improved. A molded article having excellent properties can be obtained.
- a styrene resin second styrene resin
- styrene-based resin As the second styrene-based resin, a styrene-based resin other than the styrene-based resin (first styrene-based resin) used for producing the resin composition of the present invention described above may be used. Preferably, the same styrene-based resin as the first styrene-based resin is used.
- the resin composition of the present invention and the second styrene resin are melt-kneaded to prepare a second resin composition in advance, and the second resin composition is used to prepare the second resin composition.
- the resin composition of the present invention and the second styrenic resin may be put into a molding machine to directly mold the second molded body.
- the melt-kneading apparatus is preferably used.
- the method for molding the first molded article and the second molded article using the resin composition of the present invention is not limited, and a molding method conventionally used for molding a flame-retardant resin molded article may be used as appropriate.
- extrusion molding is preferable, and it is preferably used for extrusion foam molding of plate-like extruded foams.
- a plate-shaped extruded foam is produced, for example, by blending the constituent components of a resin composition and heating and melting it, or by heating and melting a resin composition prepared in advance, injecting a foaming agent at an arbitrary stage, kneading, and foaming. It can be produced by extruding and foaming under a low-pressure atmosphere (usually atmospheric pressure) after adjusting the optimum temperature.
- the pressure when the foaming agent is injected there are no particular restrictions on the pressure when the foaming agent is injected, and it is sufficient that the pressure is higher than the internal pressure of the extruder or the like so as not to cause gasification.
- an inorganic filler such as silica, talc, calcium carbonate, or the like can be used as a foam nucleating agent, if necessary.
- the density, expansion ratio and average cell diameter of the foam can be changed by adjusting the amount of the foaming agent and the amount of the foam nucleating agent.
- blowing agents examples include lower hydrocarbons such as propane, butane, pentane, and hexane; ethers such as dimethyl ether and diethyl ether; ketones such as dimethyl ketone and methyl ethyl ketone; and alcohols such as methanol, ethanol, and propyl alcohol.
- halogenated hydrocarbons such as trichloromonofluoromethane and methyl chloride, carbon dioxide gas, inorganic gases such as water, etc. can be used alone or in combination, but the main component is a lower hydrocarbon. is preferred.
- M1 is the melt viscosity at 200° C. and a shear rate of 6.1 sec ⁇ 1
- M2 is the melt viscosity at 200° C. and a shear rate of 243 sec ⁇ 1
- Mw is the weight average molecular weight.
- melt viscosity (M1, M2) The melt viscosities (M1, M2) of the styrene resin were measured using a capillary rheometer under the following conditions. Model: "Capilograph 1D” manufactured by Toyo Seiki Co., Ltd. Temperature: 200°C Capillary length (L): 40mm Capillary diameter (D): 1 mm Barrel diameter (B): 9.55mm Shear rate: 6.1 sec -1 (piston speed 0.5 mm/min), 243 sec -1 (piston speed 20 mm/min)
- Polyolefin wax Polyolefin wax-1: Polyethylene wax "Visco wax 115" manufactured by Innospec Leuna GmbH
- Polyolefin wax-2 Oxidized polyethylene wax Clariant Japan "LICOWAX PED521”
- Epoxy compound cresol novolac type epoxy resin Huntsman Japan Co., Ltd. "ARALDITE (registered trademark) ECN 1280"
- Epoxy compound-2 Epoxidized soybean oil NOF Corporation "Newsizer 510R”
- Halogen Scavenger-1 Dolomite compound Ajinomoto Fine-Techno Co., Ltd. "Prenlyzer HC-100B”
- Halogen scavenger-2 Hydrotalcite-based compound Nitto Kasei Co., Ltd. "MC-63A”
- Antioxidant-1 Octadecyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate BASF Japan Co., Ltd. "Irganox 1076"
- Antioxidant-2 Tris (2,4-di-tert-butylphenyl) phosphite BASF Japan Co., Ltd. "Irgafos 168"
- Examples 1 to 9, Comparative Examples 1 to 8) In the blending amounts shown in Table 1, each component is put into a mixer and pre-blended, and the blended product is supplied to a twin-screw extruder (manufactured by Toshiba Corporation "TEM26SS: 14 barrels") using a constant feeder, The mixture was melt-kneaded and extruded under extrusion conditions of a cylinder temperature of 180° C., a total feeding amount of 30 kg/hour, and a screw rotation speed of 300 rpm. The extruded strand was cooled with water and led to a pelletizer to obtain pellets of the resin composition. No black foreign matter was generated in any of the obtained pellets. The bromine content in the pellets of the obtained resin composition was measured by the following method, and the following evaluation was performed. Table 1 shows the results.
- the resin compositions of Examples 1 to 9 all improved the generation of eye mucus while maintaining thermal stability, but the resin compositions of Comparative Examples 1 to 7, It was inferior in either eye mucus generation or thermal stability. Moreover, since the resin composition of Comparative Example 8 contained a large amount of polyolefin wax, it was not possible to extrude a good strand, and evaluation of eye mucus and thermal stability could not be performed.
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Abstract
Description
本発明の課題は、これらの問題を解消したスチレン系樹脂と臭素化ポリマー型難燃剤とを含有する難燃性樹脂組成物及び難燃性樹脂成形体を提供することにある。
前記スチレン系樹脂は、200℃、せん断速度6.1sec-1における溶融粘度をM1、200℃、せん断速度243sec-1における溶融粘度をM2とした時、M1/M2が5.5以上9.5以下であり、
前記スチレン系樹脂と前記臭素化ポリマー型難燃剤との合計量100質量部に対して、ポリオレフィン系ワックスを0.1質量部以上3質量部以下、含有することを特徴とする難燃性樹脂組成物である。
前記スチレン系樹脂と前記臭素化ポリマー型難燃剤との合計量100質量部に対して、前記エポキシ化合物を5質量部以上22質量部以下、前記ハロゲン捕捉剤を1質量部以上10質量部以下、前記酸化防止剤を2質量部以上10質量部以下、含有する。
前記ハロゲン捕捉剤は、少なくともドロマイト系化合物及びハイドロタルサイト系化合物を、ドロマイト系化合物/ハイドロタルサイト系化合物=10/90以上90/10以下の質量比率で含む。
(a)ブタジエン及びビニル芳香族炭化水素を単量体成分として有する共重合体であり、
(b)臭素化前の共重合体中のビニル芳香族炭化水素単量体の含有量が5質量%以上90質量%以下であり、
(c)ブタジエン中に、1,2-ブタジエンを含有し、
(d)重量平均分子量(Mw)が1000以上であり、
(e)1H-NMR分光法による未臭素化非芳香族二重結合含有量が、臭素化前の共重合体の非芳香族二重結合含有量基準で50%未満であり、
(f)熱重量分析(TGA、Thermogravimetric Analysis)による5%減量温度が200℃以上である。
さらにまた、本発明の第3は、上記本発明の第1の難燃性樹脂組成物とさらなるスチレン系樹脂とからなることを特徴とする難燃性樹脂成形体である。
本発明の樹脂組成物に用いられるスチレン系樹脂としては、スチレンのホモポリマー、スチレンと共重合可能なモノマーとのコポリマー、及びこれらにゴム補強したスチレン系樹脂が挙げられる。例えば、ポリスチレン、ゴム強化ポリスチレン(HIPS)、アクリロニトリル-スチレン共重合樹脂(AS)、アクリロニトリル-ブタジエン-スチレン共重合樹脂(ABS)、アクリロニトリル-アクリルゴム-スチレン共重合樹脂(AAS)、アクリロニトリル-エチレンプロピレンゴム-スチレン共重合樹脂、アクリロニトリル-塩素化ポリエチレン-スチレン共重合樹脂、スチレン-ブタジエン共重合樹脂等である。これらのスチレン系樹脂は単独乃至2種以上を同時に用いることもできる。最も好ましいのはポリスチレンである。
(a)ブタジエン及びビニル芳香族炭化水素を単量体成分として有する共重合体である。
(b)臭素化前の共重合体中のビニル芳香族炭化水素単量体の含有量が5質量%以上90質量%以下である。
(c)ブタジエン中に、1,2-ブタジエンを含有する。
(d)重量平均分子量(Mw)が1000以上である。
(e)1H-NMR分光法による未臭素化非芳香族二重結合含有量が、臭素化前の共重合体の非芳香族二重結合含有量基準で50%未満である。
(f)熱重量分析(TGA、Thermogravimetric Analysis)による5%減量温度が200℃以上である。
スチレン系樹脂-A:スチレンのホモポリマー(ポリスチレン)
Mw=21万
M1=5583Pa・s
M2=646Pa・s
M1/M2=8.6
スチレン系樹脂-B:スチレンのホモポリマー(ポリスチレン)
Mw=18万
M1=2229Pa・s
M2=331Pa・s
M1/M2=6.7
スチレン系樹脂-C:スチレンのホモポリマー(ポリスチレン)
Mw=15万
M1=1963Pa・s
M2=402Pa・s
M1/M2=4.9
スチレン系樹脂-D:スチレンのホモポリマー(ポリスチレン)
Mw=26万
M1=6790Pa・s
M2=640Pa・s
M1/M2=10.6
尚、重量平均分子量(Mw)と溶融粘度は以下の方法で測定した。
ゲルパーミエイションクロマトグラフィー(GPC)を用いて、次の条件で測定した。
GPC機種:昭和電工株式会社製「Shodex GPC-101」
カラム:ポリマーラボラトリーズ社製「PLgel 10μm MIXED-C」
移動相:クロロホルム
試料濃度:0.2質量%
温度:40℃(オーブン)
検出器:示差屈折計
本発明における各成分の分子量測定は、単分散ポリスチレンの溶出曲線より各溶出時間における分子量を算出し、ポリスチレン換算の分子量として算出したものである。
スチレン系樹脂の溶融粘度(M1,M2)は、キャピラリーレオメーターを用いて、次の条件で測定した。
機種:東洋精機株式会社製「キャピログラフ 1D」
温度:200℃
キャピラリー長(L):40mm
キャピラリー径(D):1mm
バレル径(B):9.55mm
せん断速度:6.1sec-1(ピストン速度0.5mm/min)、243sec-1(ピストン速度20mm/min)
ケムチュラ社製「EMERALD INNOVATION 3000」(前記(a)~(f)の特徴を有する臭素化スチレン・ブタジエンブロック共重合体、臭素含有量:60質量%)
ポリオレフィン系ワックス-1:ポリエチレンワックス
Innospec Leuna GmbH社製「ビスコワックス115」
ポリオレフィン系ワックス-2:酸化ポリエチレンワックス
クラリアントジャパン製「LICOWAX PED521」
ポリオレフィン系ワックスとの比較用として、下記エチレンビスステアリン酸アミドを使用した。
日油株式会社製「アルフローH-50S」
エポキシ化合物-1:クレゾールノボラック型エポキシ樹脂
ハンツマン・ジャパン社製「ARALDITE(登録商標)ECN 1280」
エポキシ化合物-2:エポキシ化大豆油
日油株式会社製「ニューサイザー510R」
ハロゲン捕捉剤-1:ドロマイト系化合物
味の素ファインテクノ株式会社製「プレンライザーHC-100B」
ハロゲン捕捉剤-2:ハイドロタルサイト系化合物
日東化成株式会社製「MC-63A」
酸化防止剤-1:オクタデシル-3-(3,5-ジ-tert-ブチル-4-ヒドロキシフェニル)プロピオネート
BASFジャパン社製「Irganox 1076」
酸化防止剤-2:トリス(2,4-ジ-tert-ブチルフェニル)フォスファイト
BASFジャパン社製「Irgafos 168」
表1に示す配合量で、各成分を混合機に投入して予備ブレンドを行い、ブレンド物を二軸押出機(東芝株式会社製「TEM26SS:14バレル」)に定量フィーダを用いて供給し、シリンダー温度180℃、総供給量30kg/時間、スクリュー回転数300rpmの押出条件で溶融混練して押し出した。押し出されたストランドは水冷してからペレタイザーへ導き、樹脂組成物のペレットを得た。得られたペレットには、いずれも黒異物は発生していなかった。得られた樹脂組成物のペレット中の臭素含有量を以下の方法で測定し、下記評価を行った。結果を表1に示す。
樹脂組成物のペレット中の臭素含有量を燃焼-イオンクロマトグラフィーにて以下の条件で測定した。
機種:三菱化学株式会社製「AQF-100」及びダイオネクス社製「DX-120」
燃焼管温度:1000℃
検出器:電気伝導度検出器
カラム:AS12A
流量:1.5ml/min
溶離液組成:2.7mM-Na2CO3+0.3mM-NaHCO3
試料導入量:5μl
試料量:3mg
前記した樹脂組成物の製造時に、20kgのペレットを押出後、目視にてダイス部の目脂発生状態を観察した。評価基準は以下の通りである。
A:目脂発生なし
B:わずかに目脂発生
C:著しく目脂発生
樹脂組成物のペレットを10g計量してガラス瓶に入れ、220℃のギアオーブンで60分加熱した後に取出し、冷却した。完全に冷却後、目視にて黒異物の発生状態を観察し、以下の基準で評価した。
A:黒異物は発生せず
B:ごくわずかに黒異物が発生
C:明らかな黒異物が発生
前記樹脂組成物の製造時に、ペレットを得る際のストランド状態を目視にて観察した。評価基準は以下の通りである。
A:ストランド切れなし
B:ストランド切れ多発
Claims (6)
- スチレン系樹脂と、臭素化ポリマー型難燃剤と、エポキシ化合物と、ハロゲン捕捉剤と、酸化防止剤と、を含有し、臭素含有量が18質量%以上42質量%以下である難燃性樹脂組成物において、
前記スチレン系樹脂は、200℃、せん断速度6.1sec-1における溶融粘度をM1、200℃、せん断速度243sec-1における溶融粘度をM2とした時、M1/M2が5.5以上9.5以下であり、
前記スチレン系樹脂と前記臭素化ポリマー型難燃剤との合計量100質量部に対して、ポリオレフィン系ワックスを0.1質量部以上3質量部以下、含有することを特徴とする難燃性樹脂組成物。 - 前記スチレン系樹脂と前記臭素化ポリマー型難燃剤との合計量100質量部に対して、前記エポキシ化合物を5質量部以上22質量部以下、前記ハロゲン捕捉剤を1質量部以上10質量部以下、前記酸化防止剤を2質量部以上10質量部以下、含有することを特徴とする請求項1に記載の難燃性樹脂組成物。
- 前記ハロゲン捕捉剤は、少なくともドロマイト系化合物及びハイドロタルサイト系化合物を、ドロマイト系化合物/ハイドロタルサイト系化合物=10/90以上90/10以下の質量比率で含むことを特徴とする請求項1又は2に記載の難燃性樹脂組成物。
- 前記臭素化ポリマー型難燃剤は、
(a)ブタジエン及びビニル芳香族炭化水素を単量体成分として有する共重合体であり、
(b)臭素化前の共重合体中のビニル芳香族炭化水素単量体の含有量が5質量%以上90質量%以下であり、
(c)ブタジエン中に、1,2-ブタジエンを含有し、
(d)重量平均分子量(Mw)が1000以上であり、
(e)1H-NMR分光法による未臭素化非芳香族二重結合含有量が、臭素化前の共重合体の非芳香族二重結合含有量基準で50%未満であり、
(f)熱重量分析(TGA、Thermogravimetric Analysis)による5%減量温度が200℃以上であることを特徴とする請求項1乃至3のいずれか一項に記載の難燃性樹脂組成物。 - 請求項1乃至4のいずれか一項に記載の難燃性樹脂組成物からなることを特徴とする難燃性樹脂成形体。
- 請求項1乃至4のいずれか一項に記載の難燃性樹脂組成物とさらなるスチレン系樹脂とからなることを特徴とする難燃性樹脂成形体。
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JPH0423847A (ja) * | 1990-05-16 | 1992-01-28 | Daicel Chem Ind Ltd | スチレン系樹脂組成物 |
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