WO2013099522A1 - 難燃性ポリアミド樹脂組成物およびそれからなる成形品 - Google Patents
難燃性ポリアミド樹脂組成物およびそれからなる成形品 Download PDFInfo
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- WO2013099522A1 WO2013099522A1 PCT/JP2012/081187 JP2012081187W WO2013099522A1 WO 2013099522 A1 WO2013099522 A1 WO 2013099522A1 JP 2012081187 W JP2012081187 W JP 2012081187W WO 2013099522 A1 WO2013099522 A1 WO 2013099522A1
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- polyamide
- mass
- polyamide resin
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- resin composition
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
- C08K5/098—Metal salts of carboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/3467—Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
- C08K5/3477—Six-membered rings
- C08K5/3492—Triazines
Definitions
- the present invention relates to a flame retardant polyamide resin composition having excellent moldability and excellent glow wire characteristics, flame retardancy, and electrical characteristics, and a molded article comprising the same.
- polyamide resins have been widely used in the housing, exterior parts, and electrical fields because of their excellent mechanical properties, heat resistance, flame retardancy, electrical properties, moldability, etc., especially for connector applications It is a good resin.
- the downsizing of products, housings, exterior parts, and connectors are also becoming smaller and thinner, so the demand for flame retardancy required for resins has become even more severe and advanced flame retardancy. Technology is required.
- the required temperature has been changed from 725 ° C to 775 ° C due to the revision of the IEC 60335-1 standard ("safety of electrical equipment for household and similar uses"), and the product thickness used It was stipulated that the test should be performed at a thickness closest to the product thickness without exceeding. Further, as an index of electrical characteristics, a tracking resistance index defined in IEC60112 is often used, and 600 V or more is required.
- Examples of techniques for improving flame retardancy and electrical properties include, for example, a polyamide structural unit (a) composed of a salt of an aliphatic diamine and an aliphatic dicarboxylic acid, and a polyamide structural unit (b) composed of a lactam or an ⁇ -amino acid.
- a flame retardant polyamide resin composition comprising 35 to 60 parts by weight of a triazine flame retardant based on 100 parts by weight of a polyamide resin polymerized at a predetermined ratio (see, for example, Patent Document 1). .
- Patent Document 1 contains a large amount of a triazine flame retardant, the toughness of the molded product may be lowered, and the moldability when molding a product having a complicated shape is also a problem. Become. Further, a dispersant containing a higher fatty acid salt and a carboxylic acid amide wax in a predetermined ratio is added to improve moldability, but it is difficult to achieve both moldability and glow wire characteristics.
- an aminotriazine compound salt with respect to 100 parts by weight of the polyamide resin, and at least one selected from the group consisting of a hindered phenol compound, a hydrotalcite, and an alkaline earth metal hydroxide
- a flame retardant polyamide resin composition comprising the above compound is disclosed (see, for example, Patent Document 2).
- Patent Document 2 it is described that by selecting a salt of an aminotriazine compound as a flame retardant, effects such as flame retardancy and glow wire properties can be obtained by blending about 10 parts by weight with respect to 100 parts by weight of the polyamide resin. Yes.
- Patent Document 3 discloses a technique that imparts good moldability by using a carboxylic acid amide wax as a lubricant, but the polyamide resin composition of Patent Document 3 also has a more complicated shape. In molding, it was difficult to achieve both moldability and glow wire characteristics.
- the present invention provides a flame-retardant polyamide resin composition capable of obtaining a molded product having excellent moldability and excellent glow wire characteristics, flame retardancy, electrical characteristics and toughness, and It is an object to provide a molded product.
- the polyamide resin (A) contains a specific amount of a triazine compound (B), a higher fatty acid metal salt (C1), and a carboxylic acid amide wax (C2). It has been found that the above object can be achieved by the blended flame-retardant polyamide resin composition, and the present invention has been achieved.
- the flame retardant polyamide resin composition of the present invention contains a polyamide resin (A), a triazine compound (B), and a lubricant (C), and the polyamide resin (A) and the triazine compound (
- the blending ratio of B) and the lubricant (C) is 12 to 38 parts by mass of the triazine compound (B) and 0.1% of the lubricant (C) with respect to 100 parts by mass of the polyamide resin (A).
- the polyamide resin (A) is at least 2% by mass to 98% by mass caproamide units (a1) and 2% by mass to 98% by mass.
- the polyamide resin (A) is at least 50% by mass to 98% by mass caproamide units (a1) and 2% by mass to 50% by mass.
- the polyamide resin (A) further comprises at least 50% by mass and not more than 98% by mass of hexamethylene adipamide units (a2) and 2 A polyamide 66 / polyamide 6 copolymer resin (A3) containing at least mass% and less than 50 mass% of caproamide units (a1).
- the polyamide resin (A) further includes a polyamide 66 resin (A4).
- the flame retardant polyamide resin composition of the present invention is the thickness obtained by injection molding of the flame retardant polyamide resin composition in the above invention under the conditions of a cylinder temperature of 280 ° C. and a mold surface temperature of 80 ° C.
- the glow wire ignition temperature in a test based on IEC60695-2-13 for each of the 0.75 mm, 1.5 mm, and 3 mm test pieces is 825 ° C. or higher.
- the molded article of the present invention is formed by molding the flame retardant polyamide resin composition described in any one of the above by injection molding, extrusion molding or blow molding.
- the molded product of the present invention is the above-mentioned invention, wherein the molded product is a casing, an exterior part, or a connector.
- the flame-retardant polyamide resin composition of the present invention comprises a specific amount of a higher fatty acid metal salt (C1) and a carboxylic acid amide wax (C2) as a triazine compound (B) and a lubricant (C) in a polyamide resin (A).
- C1 higher fatty acid metal salt
- C2 carboxylic acid amide wax
- B triazine compound
- C lubricant
- Examples of the polyamide resin (A) used in the present invention include a polyamide resin obtained by polymerization of a lactam having three or more members, a polymerizable amino acid, a diamine and a dibasic acid, or a mixture thereof.
- polyamide resins obtained from lactams such as ⁇ -caprolactam, enantolactam, undecaractam, dodecaractam, aminocaproic acid, 7-aminoheptanoic acid, 8-aminooctanoic acid, 9-aminononanoic acid, 10-
- lactams such as ⁇ -caprolactam, enantolactam, undecaractam, dodecaractam, aminocaproic acid, 7-aminoheptanoic acid, 8-aminooctanoic acid, 9-aminononanoic acid
- lactams such as ⁇ -caprolactam, enantolactam, undecaractam, dodecaractam, aminocaproic acid, 7-aminoheptanoic acid, 8-aminooctanoic acid, 9-aminononanoic acid
- polyamide resins obtained from polymerizable amino acids such as aminodecano
- Polyamide resins obtained from diamines and dibasic acids include tetramethylene diamine, pentamethylene diamine, 2-methyl-1,5-diminopentane, 3-methyl-1,5-diminopentane, hexamethylene diamine, heptamethylene diamine.
- the polyamide resin (A) used in the present invention includes any copolymer of the above monomer units.
- the polyamide resin (A) may contain two or more of the above polyamide resins or polyamide copolymers.
- the polyamide resin (A) used in the present invention is preferably a polyamide 6 / polyamide 66 copolymer resin from the viewpoint of toughness, moldability, and cost of a molded product.
- the polyamide resin (A) used in the present invention contains at least 2% by mass to 98% by mass of caproamide units (a1) and 2% by mass to 98% by mass of hexamethylene adipamide units (a2).
- the polyamide 6 / polyamide 66 copolymer resin (A1) is preferable.
- the polyamide resin (A) used in the present invention is a polyamide containing at least 50% by mass to 98% by mass caproamide units (a1) and 2% by mass to 50% by mass hexamethylene adipamide units (a2). 6 / polyamide 66 copolymer resin (A2) is preferred.
- the polyamide resin (A) used in the present invention is a copolymer of at least 70% by mass to 98% by mass caproamide units (a1) and 2% by mass to 30% by mass hexamethylene adipamide units (a2). Particularly preferred is a copolymer of at least 90% by mass to 98% by mass of caproamide units (a1) and 2% by mass to 10% by mass of hexamethylene adipamide units (a2). preferable.
- a polyamide 6 / polyamide 66 copolymer resin (A2) containing 50% by mass or more of caproamide units (a1) as the polyamide resin (A) according to the present invention a large amount of the triazine compound (B) was blended. Even in this case, the toughness of the molded product can be kept high, and the appearance can be improved. Further, by using the polyamide 6 / polyamide 66 copolymer resin (A2) containing 2% by mass or more of the hexamethylene adipamide unit (a2), the glow wire characteristics of the molded product are further improved.
- the polyamide resin (A) according to the present invention is at least more than 50% by mass and 98% by mass or less of hexamethylene adipamide units (a2) and 2% by mass or more. It is preferable to contain a polyamide 66 / polyamide 6 copolymer resin (A3) containing less than 50% by mass of caproamide units (a1). Even when a large amount of the triazine compound (B) is blended by using the polyamide 6 / polyamide 66 copolymer resin (A2) and the polyamide 66 / polyamide 6 copolymer resin (A3) in combination, The toughness can be kept high and the appearance of the molded product becomes good.
- the polyamide 66 / polyamide 6 copolymer resin (A3) used in combination with the polyamide 6 / polyamide 66 copolymer resin (A2) is at least 70% by mass to 98% by mass hexamethylene adipamide units (a2) and 2% by mass. % Or more and 30% by mass or less of a caproamide unit (a1) copolymer, particularly at least 90% by mass or more and 98% by mass or less of hexamethylene adipamide units (a2) and 2% by mass or more and 10% by mass or less. Most preferably, it is a copolymer of the following caproamide units (a1).
- a polyamide 66 / polyamide 6 copolymer resin (A3) containing 2% by mass or more of a caproamide unit (a1) is used in combination with a polyamide 6 / polyamide 66 copolymer resin (A2). Even when a large amount of the triazine compound (B) is blended, the toughness of the molded product can be kept high, and the appearance is improved. Moreover, by using together the polyamide 66 / polyamide 6 copolymer resin (A3) containing more than 50% by mass of the hexamethylene adipamide unit (a2) with the polyamide 6 / polyamide 66 copolymer resin (A2), Glow wire characteristics are further improved.
- the polyamide resin (A) according to the present invention contains (A2) and (A3) in an amount of 15% by mass or more, the toughness at the time of water absorption of the molded product can be kept high.
- the polyamide resin (A) according to the present invention preferably further contains a polyamide 66 resin (A4).
- the polyamide resin (A) according to the present invention contains the polyamide 66 resin (A4), moldability including mold releasability is greatly improved without impairing the glow wire characteristics.
- the polyamide 6 / polyamide 66 copolymer resin (A2) and the polyamide 66 resin (A4) are used in combination.
- polyamide 66 resin (A4) is 10 masses in a polyamide resin (A). % Or more is preferable.
- the molecular weight of the polyamide resin (A) used in the present invention is not particularly limited, but from the viewpoint of fluidity of the obtained flame-retardant polyamide resin composition, a solution dissolved in 98% concentrated sulfuric acid at a concentration of 1 g / dl.
- the relative viscosity is preferably in the range of 1.8 to 5.0 at 25 ° C., more preferably in the range of 1.8 to 4.0.
- polyamide resin (A) used by this invention there is no restriction
- the above-mentioned 3-membered ring lactam, the polymerizable amino acid, a diamine and a dibasic acid, or a mixture thereof is superposition
- a desired polyamide resin (A) can be obtained by producing an oligomer by condensing under high pressure and high temperature, and then proceeding the polymerization to an appropriate melt viscosity by reducing the pressure.
- a commercial item can also be used.
- the flame-retardant polyamide resin composition of the present invention comprises a polyamide resin (A) and a triazine compound (B) in an amount of 12 to 38 parts by mass of the triazine compound (B) with respect to 100 parts by mass of the polyamide resin (A). It is necessary to contain in the ratio.
- the flame retardant polyamide resin composition of the present invention contains the triazine compound (B)
- a molded product having high glow wire characteristics and flame retardancy can be obtained.
- the glow wire characteristics of the molded product are deteriorated.
- the content of the triazine compound (B) is preferably 15 parts by mass or more, and more preferably 20 parts by mass or more. On the other hand, when the content of the triazine compound (B) exceeds 38 parts by mass in the flame retardant polyamide resin composition of the present invention, the toughness of the molded product is lowered.
- the content of the triazine compound (B) is preferably 33 parts by mass or less.
- the triazine compound (B) refers to a compound having a triazine skeleton containing three nitrogen atoms and having an unsaturated 6-membered ring structure.
- the triazine-based compound (B) is known as a flame retardant that can be blended with a thermoplastic resin to impart flame retardancy.
- a flame retardant that can be blended with a thermoplastic resin to impart flame retardancy.
- Specific examples include melamine, melem, melam, melon, and cyanuric acid, and a salt of melamine, melem, melam, or melon and cyanuric acid. A mixture of these may also be used.
- Melamine cyanurate is particularly preferred because of its heat resistance and good mixing with the polyamide resin (A).
- the average particle size of the triazine compound (B) is preferably 15 ⁇ m or less. If the average particle diameter is 15 ⁇ m or less, the toughness at the time of water absorption is further improved.
- the average particle diameter is a number average particle diameter calculated from a value measured according to JIS K 5600-9-3 (2006).
- triazine compound (B) for example, MC25 (melamine cyanurate) manufactured by Italmatch, MC4000 (melamine cyanurate) manufactured by Nissan Chemical Industries, Ltd. can be used.
- the lubricant (C) used in the present invention contains a higher fatty acid metal salt (C1) and a carboxylic acid amide wax (C2) from the viewpoint of glow wire characteristics and moldability.
- a higher fatty acid metal salt (C1) and a carboxylic acid amide wax (C2) from the viewpoint of glow wire characteristics and moldability.
- it is important to contain at a mass ratio of (C1) / (C2) 30/70 to 70/30.
- the total amount of the lubricant (C) is 0.1 to 2.0 parts by mass with respect to 100 parts by mass of the polyamide resin (A).
- the total amount of the lubricant (C) is less than 0.1 parts by mass, the moldability is lowered. It is preferable to set it as 0.5 mass part or more.
- the total amount of (C) exceeds 2.0 parts by mass, the glow wire characteristics of the molded product deteriorate. It is preferable to be 1.9 parts by mass or less.
- the higher fatty acid metal salt (C1) used in the present invention is a salt of an aliphatic carboxylic acid or hydroxycarboxylic acid having 12 or more carbon atoms and a metal ion, specifically, lauric acid, myristic acid, palmitic acid, Aliphatic carboxylic acids such as stearic acid, behenic acid, serotic acid, montanic acid, mellic acid, oleic acid, erucic acid, 12-hydroxystearic acid and hydroxycarboxylic acids and metals such as lithium, calcium, barium, magnesium, aluminum, zinc It is a salt with ions. Two or more of these may be used as the higher fatty acid metal salt (C1). In particular, from the viewpoints of price and versatility, lithium stearate and calcium stearate are preferable, and lithium stearate is more preferable.
- higher fatty acid metal salt (C1) for example, Li-St (lithium stearate) manufactured by Katsuta Chemical Co., Ltd. can be used.
- the carboxylic acid amide wax (C2) used in the present invention is a compound obtained by polycondensation of aliphatic carboxylic acid, hydroxycarboxylic acid and / or polybasic acid and diamine.
- Examples of the aliphatic carboxylic acid or hydroxycarboxylic acid used in the carboxylic acid amide wax (C2) include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, serotic acid, montanic acid, melicic acid, and olein. Examples include acids, erucic acid, and 12-hydroxystearic acid.
- Polybasic acids used for the carboxylic acid amide wax (C2) include oxalic acid, malonic acid, succinic acid, glutamic acid, adipic acid, pimelic acid, azelaic acid, sebacic acid, 1,10-decanedicarboxylic acid.
- Examples include acid, phthalic acid, terephthalic acid, cyclohexanedicarboxylic acid, and cyclohexylsuccinic acid.
- the diamine used in the carboxylic acid amide wax (C2) includes ethylenediamine, 1,3-propanediamine, 1,4-butanediamine, hexamethylenediamine, metaxylenediamine, tolylenediamine, paraxylenediamine, Examples thereof include phenylenediamine, isophoronediamine, 1,10-decanediamine, 1,12-dodecanediamine, 4,4-diaminodicyclohexylmethane, and 4,4-diaminodiphenylmethane.
- Examples of the carboxylic acid amide wax (C2) used in the present invention include the above-mentioned aliphatic carboxylic acids, hydroxycarboxylic acids and / or polycondensation compounds of polybasic acids and diamines.
- the carboxylic acid amide wax (C2) used in the present invention two or more of these may be used.
- a compound obtained by polycondensation of stearic acid and sebacic acid and ethylenediamine is preferable.
- carboxylic acid amide wax (C2) for example, WH215 (polycondensate of ethylenediamine, sebacic acid and stearic acid) manufactured by Kyoeisha Chemical Co., Ltd. can be used.
- the flame-retardant polyamide resin composition of the present invention further includes other polymers, copper-based heat stabilizers, hindered phenol-based, phosphorus-based, sulfur-based antioxidants, and the like within a range that does not impair the object of the present invention.
- One or more usual additives such as stabilizers, ultraviolet absorbers, antistatic agents, and colorants including dyes and pigments may be contained.
- the method for producing the flame retardant polyamide resin composition of the present invention is not particularly limited.
- a mixture of the above materials is heated at 220 ° C. to 330 ° C. using a kneader such as a single-screw or twin-screw extruder or a kneader.
- a kneader such as a single-screw or twin-screw extruder or a kneader.
- a kneader such as a single-screw or twin-screw extruder or a kneader.
- a kneading method at a temperature.
- a flame retardant such as a triazine compound (B) exhibits a higher flame retardant effect as its dispersibility becomes better, and therefore, a production method in which it is melt kneaded simultaneously with the polyamide resin (A) component is preferable.
- the glow wire ignition temperature is a thickness of 0.75 mm, 1.5 mm, It is preferable that it is 825 degreeC or more in 3 mm. If glow wire ignition temperature is 825 degreeC or more, the glow wire characteristic in a complicated product shape can be improved more.
- the glow wire ignition temperature is called GW-IT (Glow Wire Ignition Temperature), and the wire heated to a desired temperature is pressed against a resin molded product with a specified thickness and does not ignite or extinguishes within 5 seconds after ignition.
- Maximum temperature + 25 ° C. (however, when the test temperature is 900 to 960 ° C., the maximum temperature + 30 ° C.).
- the flame-retardant polyamide resin composition of the present invention can be easily molded by ordinary methods such as injection molding, extrusion molding, blow molding, etc., and the obtained molded product has excellent moldability, glow wire characteristics, toughness It has excellent flame retardancy and electrical characteristics, and is suitable for electrical and electronic parts, automobile parts, housings, exterior parts, and connectors. Further, since it is particularly excellent in glow wire characteristics, toughness, flame retardancy, and electrical characteristics required for electric and electronic parts, it is particularly suitable for connector parts.
- Molded products obtained by molding the flame retardant polyamide resin composition of the present invention are liquid crystal televisions, plasma displays, PDAs, small televisions, radios, notebook computers, personal computers, printers, scanners, computer peripherals, video decks, DVD decks.
- Tensile breaking strain ISO 527-1, -2 (B) Tensile breaking strain (at 3% water absorption) The test piece obtained by the said method was immersed in 60 degreeC warm water, and the water absorption was calculated
- Reference Example 1 Polyamide 6 / Polyamide 66 copolymer resin (A2) A material obtained by dissolving 95.0 parts by mass of ⁇ -caprolactam and 5.0 parts by mass of a salt of hexamethylenediamine and adipic acid in pure water and having a water content of 1 part by mass is used as a raw material for polymerization.
- the raw materials were reacted while adjusting the temperature of the polymerization tower with a heater attached to the upper part, middle part, and lower part of the polymerization tower.
- the polymer discharged into the water bath was pelletized with a strand cutter, and the obtained pellets were subjected to hot water extraction at 95 ° C./20 hours / bath ratio 20 times to remove unreacted raw materials and oligomers. After extraction, it was dried under reduced pressure at 80 ° C./30 hours to obtain a polyamide 6 / polyamide 66 copolymer resin (A2).
- the relative viscosity with 98% sulfuric acid according to JIS-K6810 was 2.75.
- Triazine compound (B) Italmatch, Inc .: MC25 (melamine cyanurate) was used.
- the average particle diameter (number average value) was measured according to JIS K5600-9-3 and found to be 4 ⁇ m.
- Example 1 Polyamide 6 / polyamide 66 copolymer resin (A2) shown in Reference Example 1, triazine compound (B) shown in Reference Example 4, higher fatty acid metal salt (C1) shown in Reference Example 5, shown in Reference Example 6
- the carboxylic acid amide wax (C2) was top-feeded into the twin-screw extruder (manufactured by Werner & Pfleiderer: ZSK57) at the blending amount shown in Table 1, under the conditions of a cylinder set temperature of 290 ° C. and a screw speed of 200 rpm And kneaded to form a strand-like gut, cooled in a cooling bath, and granulated with a cutter to obtain pellets. Using the obtained pellets, various characteristics were examined by the above evaluation method. The results are shown in Table 1.
- Example 7 Polyamide 66 resin (A4) shown in Reference Example 3, triazine compound (B) shown in Reference Example 4, higher fatty acid metal salt (C1) shown in Reference Example 5, carboxylic acid amide system shown in Reference Example 6
- the wax (C2) was melt-kneaded in the same amount as shown in Table 1 in the same manner as in Example 1, pellets were obtained in the same manner as in Example 1, and various characteristics were examined by the evaluation methods described above. The results are shown in Table 1.
- Example 8 Polyamide 6 / polyamide 66 copolymer resin (A2) shown in Reference Example 1, triazine compound (B) shown in Reference Example 4, higher fatty acid metal salt (C1) shown in Reference Example 5, shown in Reference Example 6
- the carboxylic acid amide wax (C2) was melt kneaded in the same amount as shown in Table 1 in the same manner as in Example 1, pellets were obtained in the same manner as in Example 1, and various characteristics were examined by the evaluation methods described above. The results are shown in Table 1.
- Example 9 Polyamide 66 / polyamide 6 copolymer resin (A3) shown in Reference Example 2, triazine compound (B) shown in Reference Example 4, higher fatty acid metal salt (C1) shown in Reference Example 5, shown in Reference Example 6
- the carboxylic acid amide wax (C2) was melt kneaded in the same amount as shown in Table 1 in the same manner as in Example 1, pellets were obtained in the same manner as in Example 1, and various characteristics were examined by the evaluation methods described above. The results are shown in Table 1.
- Example 14 The polyamide 6 / polyamide 66 copolymer resin (A2) shown in Reference Example 1, the polyamide 66 resin (A4) shown in Reference Example 3, the triazine compound (B) shown in Reference Example 4, and the reference example 5
- the higher fatty acid metal salt (C1) and the carboxylic acid amide wax (C2) shown in Reference Example 6 were melted and kneaded in the same manner as in Example 1 with the blending amounts shown in Table 2, to obtain pellets. Various characteristics were investigated. The results are shown in Table 2.
- Table 3 shows the polyamide 6 / polyamide 66 copolymer resin (A2) shown in Reference Example 1, the triazine compound (B) shown in Reference Example 4, and the carboxylic acid amide wax (C2) shown in Reference Example 6.
- the mixture was melt kneaded in the same manner as in Example 1, pellets were obtained in the same manner as in Example 1, and various characteristics were examined by the evaluation method described above. The results are shown in Table 3.
- the flame-retardant polyamide resin composition and the molded product of the present invention are excellent in moldability and have excellent glow wire characteristics, toughness, flame retardancy, and electrical characteristics, so that electrical and electronic parts, automobile parts, housings, exterior parts, It can be suitably used for a connector.
Abstract
Description
ISO1874-2に従い、実施例および比較例で得られたペレットを、日精樹脂工業(株)製の射出成形機NEX1000により、シリンダ温度300℃、金型表面温度100℃、スクリュー回転数150rpm、平行部流速200mm/秒、射出/冷却=20/20秒の条件で射出成形し、ISO Type-A規格の試験片を作製した。
(a)引張り破断ひずみ(絶乾時)
上記方法により得られた試験片をアルミの防湿袋に真空密閉した。この試験片を用いて、以下の標準方法に従って引張り破断ひずみを測定した。引張り破断ひずみ(絶乾時)が3.0%以上であれば、靱性に優れると判断した。
引張り破断ひずみ:ISO 527-1、-2
(b)引張り破断ひずみ(3%吸水時)
上記方法により得られた試験片を60℃温水中に浸漬し、試験片の質量変化により吸水率を求めた。吸水率が3%となった時点で上記標準方法に従って引張り破断ひずみを同様に測定した。引張り破断ひずみ(3%吸水時)が40%以上であれば、吸水時の靱性に優れると判断した。
実施例および比較例で得られたペレットを用いて、日精樹脂工業(株)製の射出成形機NEX1000により、シリンダ温度280℃、金型表面温度80℃、スクリュー回転数100rpm、射出圧力150MPa、射出速度80mm/秒、射出/冷却=10/20秒の条件で射出成形し、127mm×12.7mm×1/64inchの試験片を作製した。得られた試験片を用いてUL94規格(米国Under Writer Laboratories Incで定められた規格)に準拠し、難燃性を評価した。
実施例および比較例で得られたペレットを、日精樹脂工業(株)製の射出成形機NEX1000により、シリンダ温度280℃、金型表面温度80℃、スクリュー回転数150rpm、射出圧力100MPa、射出速度100mm/秒、射出/冷却=20/20秒の条件で射出成形し、80mm×80mm×相応厚み(mm)の試験片を作製した。なお、試験片は厚み0.75mm、1.0mm、1.5mm、2.0mmおよび3.0mmの5種類を準備した。得られた試験片を用いて、IEC60695-2-13に準拠してグローワイヤー着火温度(GW-IT)を測定した。全ての試験片厚みにて、GW-IT:825℃以上を満たしたときに合格とした。
実施例および比較例で得られたペレットを、日精樹脂工業(株)製の射出成形機NEX1000により、シリンダ温度280℃、金型表面温度80℃、スクリュー回転数150rpm、射出圧力100MPa、射出速度100mm/秒、射出/冷却=20/20秒の条件で射出成形し、および80mm×80mm×3mmの試験片を作製した。得られた試験片を用いて、UL746Aに準拠して測定した。
実施例および比較例で得られたペレットを、日精樹脂工業(株)製の射出成形機NEX1000により、シリンダ温度280℃、金型表面温度80℃、スクリュー回転数150rpm、射出圧力100MPa、射出速度100mm/秒、射出/冷却=20/20秒の条件で射出成形し、25mm×25mm×25mm、肉厚1mmの箱型成形品を作製した。離型時にかかるエジェクタプレートへの負荷をロードセルで測定し、この数値を離型力とした。離型力100N未満を合格とした。
ε-カプロラクタム95.0質量部およびヘキサメチレンジアミンとアジピン酸の塩5.0質量部とを純水に溶解し、水分量を1質量部としたものを重合用の原料とし、得られた原料を重合塔に送った。重合塔上部、中間部、下部に取り付けられたヒーターにより重合塔の温度を加熱調整しながら、原料を反応させた。水浴中に吐出したポリマーをストランドカッターでペレタイズし、得られたペレットを95℃/20時間/浴比20倍にて熱水抽出を行い、未反応原料とオリゴマーを除去した。抽出後80℃/30時間減圧乾燥し、ポリアミド6/ポリアミド66共重合樹脂(A2)を得た。JIS-K6810に従った98%硫酸での相対粘度は2.75であった。
ε-カプロラクタム3.0質量部とヘキサメチレンジアミンとアジピン酸の塩97.0質量部とを重合缶に投入し、水分量が45質量部となるように純水を加え、重合缶内を窒素で置換した後、260℃まで昇温した。ついで、1.7MPaにて1時間制圧・重合後、吐出・カッティングし、ポリアミド66/ポリアミド6共重合樹脂(A3)を得た。JIS-K6810に従った98%硫酸での相対粘度は2.60であった。
ポリアミド66(東レ株式会社製“アミラン(登録商標)”CM3001N:98%硫酸での相対粘度 3.0)を使用した。
イタルマッチ社製:MC25(メラミンシアヌレート)を用いた。なお、JIS K5600-9-3に準じて平均粒子径(数平均値)を測定したところ、4μmであった。
勝田化工(株)製:Li-St(ステアリン酸リチウム)を使用した。
共栄社化学(株)製:WH215(エチレンジアミンとセバシン酸、ステアリン酸との重縮合物)を用いた。
参考例1に示したポリアミド6/ポリアミド66共重合樹脂(A2)、参考例4に示したトリアジン系化合物(B)、参考例5に示した高級脂肪酸金属塩(C1)、参考例6に示したカルボン酸アミド系ワックス(C2)を表1に示す配合量で2軸押出機(Werner&Pfleiderer製:ZSK57)にトップフィード(元込めフィード)し、シリンダ設定温度290℃、スクリュー回転数200rpmの条件下で溶融混練し、ストランド状のガットを成形し、冷却バスで冷却後、カッターで造粒してペレットを得た。得られたペレットを用いて、前記の評価方法によって諸特性を調べた。その結果を表1に示す。
参考例3に示したポリアミド66樹脂(A4)、参考例4に示したトリアジン系化合物(B)、参考例5に示した高級脂肪酸金属塩(C1)、参考例6に示したカルボン酸アミド系ワックス(C2)を表1に示す配合量で実施例1と同様に溶融混練し、実施例1と同様にしてペレットを得て、前記の評価方法によって諸特性を調べた。その結果を表1に示す。
参考例1に示したポリアミド6/ポリアミド66共重合樹脂(A2)、参考例4に示したトリアジン系化合物(B)、参考例5に示した高級脂肪酸金属塩(C1)、参考例6に示したカルボン酸アミド系ワックス(C2)を表1に示す配合量で実施例1と同様に溶融混練し、実施例1と同様にしてペレットを得て、前記の評価方法によって諸特性を調べた。その結果を表1に示す。
参考例2に示したポリアミド66/ポリアミド6共重合樹脂(A3)、参考例4に示したトリアジン系化合物(B)、参考例5に示した高級脂肪酸金属塩(C1)、参考例6に示したカルボン酸アミド系ワックス(C2)を表1に示す配合量で実施例1と同様に溶融混練し、実施例1と同様にしてペレットを得て、前記の評価方法によって諸特性を調べた。その結果を表1に示す。
参考例1に示したポリアミド6/ポリアミド66共重合樹脂(A2)、参考例2に示したポリアミド66/ポリアミド6共重合樹脂(A3)、参考例4に示したトリアジン系化合物(B)、参考例5に示した高級脂肪酸金属塩(C1)、参考例6に示したカルボン酸アミド系ワックス(C2)を表2に示す配合量で実施例1と同様に溶融混練し、実施例1と同様にしてペレットを得て、前記の評価方法によって諸特性を調べた。その結果を表2に示す。
参考例1に示したポリアミド6/ポリアミド66共重合樹脂(A2)、参考例3に示したポリアミド66樹脂(A4)、参考例4に示したトリアジン系化合物(B)、参考例5に示した高級脂肪酸金属塩(C1)、参考例6に示したカルボン酸アミド系ワックス(C2)を表2に示す配合量で実施例1と同様に溶融混練し、ペレットを得て、前記の評価方法によって諸特性を調べた。その結果を表2に示す。
参考例1に示したポリアミド6/ポリアミド66共重合樹脂(A2)、参考例4に示したトリアジン系化合物(B)を表3に示す配合量で実施例1と同様に溶融混練し、実施例1と同様にしてペレットを得て、前記の評価方法によって諸特性を調べた。その結果を表3に示す。
参考例1に示したポリアミド6/ポリアミド66共重合樹脂(A2)、参考例4に示したトリアジン系化合物(B)、参考例5に示した高級脂肪酸金属塩(C1)を表3に示す配合量で実施例1と同様に溶融混練し、実施例1と同様にしてペレットを得て、前記の評価方法によって諸特性を調べた。その結果を表3に示す。
参考例1に示したポリアミド6/ポリアミド66共重合樹脂(A2)、参考例4に示したトリアジン系化合物(B)、参考例6に示したカルボン酸アミド系ワックス(C2)を表3に示す配合量で実施例1と同様に溶融混練し、実施例1と同様にしてペレットを得て、前記の評価方法によって諸特性を調べた。その結果を表3に示す。
参考例1に示したポリアミド6/ポリアミド66共重合樹脂(A2)、参考例4に示したトリアジン系化合物(B)、参考例5に示した高級脂肪酸金属塩(C1)、参考例6に示したカルボン酸アミド系ワックス(C2)を表3に示す配合量で実施例1と同様に溶融混練し、実施例1と同様にしてペレットを得て、前記の評価方法によって諸特性を調べた。その結果を表3に示す。
Claims (9)
- ポリアミド樹脂(A)と、
トリアジン系化合物(B)と、
滑剤(C)と、を含有し、
前記ポリアミド樹脂(A)、前記トリアジン系化合物(B)、および前記滑剤(C)の配合割合は、前記ポリアミド樹脂(A)100質量部に対して、前記トリアジン系化合物(B)が12~38質量部、前記滑剤(C)が0.1~2.0質量部であり、
前記滑剤(C)は、高級脂肪酸金属塩(C1)およびカルボン酸アミド系ワックス(C2)を、(C1)/(C2)= 30/70~70/30の質量比で含む難燃性ポリアミド樹脂組成物。 - 前記ポリアミド樹脂(A)は、少なくとも2質量%以上98質量%以下のカプロアミド単位(a1)および2質量%以上98質量%以下のヘキサメチレンアジパミド単位(a2)を含むポリアミド6/ポリアミド66共重合樹脂(A1)を含む請求項1に記載の難燃性ポリアミド樹脂組成物。
- 前記ポリアミド樹脂(A)は、少なくとも50質量%以上98質量%以下のカプロアミド単位(a1)および2質量%以上50質量%以下のヘキサメチレンアジパミド単位(a2)を含むポリアミド6/ポリアミド66共重合樹脂(A2)を含む請求項1または2に記載の難燃性ポリアミド樹脂組成物。
- 前記ポリアミド樹脂(A)は、さらに、少なくとも50質量%より多く98質量%以下のヘキサメチレンアジパミド単位(a2)および2質量%以上50質量%より少ないカプロアミド単位(a1)を含むポリアミド66/ポリアミド6共重合樹脂(A3)を含む請求項3に記載の難燃性ポリアミド樹脂組成物。
- 前記ポリアミド6/ポリアミド66共重合樹脂(A2)とポリアミド66/ポリアミド6共重合樹脂(A3)との質量比が、(A2)/(A3)=15/85~85/15である請求項4に記載の難燃性ポリアミド樹脂組成物。
- 前記ポリアミド樹脂(A)は、さらにポリアミド66樹脂(A4)を含む請求項2~5のいずれか一つに記載の難燃性ポリアミド樹脂組成物。
- 前記難燃性ポリアミド樹脂組成物を、シリンダ温度280℃、金型表面温度80℃の条件で射出成形して得られた厚み0.75mm、1.5mm、および3mmの各試験片についての、IEC60695-2-13に準拠した試験におけるグローワイヤー着火温度が825℃以上である請求項1~6のいずれか一つに記載の難燃性ポリアミド樹脂組成物。
- 請求項1~7のいずれか一つに記載の難燃性ポリアミド樹脂組成物を、射出成形、押出成形またはブロー成形により成形してなる成形品。
- 前記成形品は、筐体、外装部品またはコネクターである請求項8に記載の成形品。
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