WO2012169334A1 - 反応性ポリアミド樹脂およびポリアミド樹脂組成物 - Google Patents
反応性ポリアミド樹脂およびポリアミド樹脂組成物 Download PDFInfo
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- WO2012169334A1 WO2012169334A1 PCT/JP2012/062814 JP2012062814W WO2012169334A1 WO 2012169334 A1 WO2012169334 A1 WO 2012169334A1 JP 2012062814 W JP2012062814 W JP 2012062814W WO 2012169334 A1 WO2012169334 A1 WO 2012169334A1
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- diamine
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
- C08G69/26—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from polyamines and polycarboxylic acids
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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
- C08L101/00—Compositions of unspecified macromolecular compounds
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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
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/06—Polyamides derived from polyamines and polycarboxylic acids
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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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/14—Glass
Definitions
- the present invention relates to a reactive polyamide resin and a polyamide resin composition, and more particularly to a reactive polyamide resin having a low yellow index (YI) and a reduced increase in YI after heating.
- the present invention also relates to a reactive polyamide resin excellent in reactivity with an elastomer or the like and a polyamide resin composition comprising the same and an elastomer.
- Polyamide resin is an engineering plastics with excellent mechanical strength such as impact resistance, friction resistance and wear resistance, heat resistance, and oil resistance. It is an automotive part, electronic / electric equipment part, OA equipment part, machine. It is widely used in fields such as parts, building materials and housing equipment, and the field of use has expanded in recent years.
- polyamide resins such as polyamide 6 and polyamide 66 are known.
- Metaxylylene adipamide (hereinafter, also referred to as “MXD6”) obtained from metaxylylenediamine and adipic acid is used.
- MXD6 Metaxylylene adipamide
- polyamide 66, etc. it has an aromatic ring in the main chain, has high rigidity, low water absorption, excellent oil resistance, and has low molding shrinkage and small shrinkage and warpage in molding. It is also suitable for precision molding and is positioned as an extremely excellent polyamide resin.
- MXD6 is a molding material in various fields such as electronic / electric equipment parts, transport parts such as automobiles, general machine parts, precision machine parts, leisure sports equipment, civil engineering and building materials, especially for injection molding. In recent years, it has been increasingly used as a material.
- a lighter and stronger polyamide resin material is also demanded.
- a xylylene-based polyamide resin lighter than MXD6 a xylylene-sebacamide-based polyamide resin (hereinafter referred to as “XD10”) obtained from xylenediamine and sebacic acid. ) Is known (see Patent Document 1), and is excellent in chemical resistance and impact resistance.
- Patent Document 5 a polyamide having a difference between a specific carboxyl group concentration and an amino group concentration by copolymerizing ⁇ -caprolactam has been proposed. There were aspects that were insufficient in physical properties for use.
- blending an elastomer with MXD6 or XD10 for the purpose of increasing elongation is an effective method for imparting high impact resistance and flexibility.
- dispersion of XD10 and the elastomer tends to be insufficient, and there is a problem that the original rigidity and impact resistance are likely to be lowered.
- the polyamide resin is required to have a low YI. In particular, it is required to suppress an increase in YI after heating.
- An object of the present invention is to solve the above-described problems, and an object of the present invention is to provide an XD 10 that has a low YI and can suppress an increase in YI after heating. Furthermore, it aims at providing XD10 which can provide the high impact resistance and flexibility by elastomer mixing, maintaining the outstanding characteristic which XD10 originally has.
- the reactive functional group concentration is as high as 100 or more, and the molar ratio of reacted diamine to reacted dicarboxylic acid (number of moles of reacted diamine). / Mole number of reacted dicarboxylic acid) is 1.0 or more and XD10-based reactive polyamide resin with excess amino group finds that YI is low and can suppress increase in YI even after heating, and completes the present invention I arrived. It has also been found that such an XD10-based reactive polyamide resin can exhibit excellent impact resistance and flexibility due to the elastomer. Specifically, the above problem has been solved by the following means.
- ⁇ 1> Polyamide resin in which 70 mol% or more of diamine constituent units are polycondensed with diamine (A) derived from xylylenediamine and 50 mol% or more of dicarboxylic acid constituent units derived from dicarboxylic acid (B) derived from sebacic acid
- the reactive functional group concentration is 100 ⁇ eq / g or more, and the molar ratio of reacted diamine to reacted dicarboxylic acid (mole number of reacted diamine / mole number of reacted dicarboxylic acid) is 1.0 or more.
- Reactive polyamide resin characterized by ⁇ 2> The reactive polyamide resin according to ⁇ 1>, wherein the reactive functional group is present at an end of the polyamide resin.
- ⁇ 3> The reactive polyamide group according to ⁇ 1> or ⁇ 2>, wherein the reactive functional group is a carboxyl group and / or an amino group.
- ⁇ 4> The reactive polyamide resin according to ⁇ 3>, wherein the amino group concentration is 50 ⁇ eq / g or more.
- ⁇ 5> The reactive polyamide resin according to any one of ⁇ 1> to ⁇ 4>, wherein the number average molecular weight is 20,000 or less.
- ⁇ 6> The reactive polyamide resin according to any one of ⁇ 1> to ⁇ 5>, wherein the xylylenediamine is metaxylylenediamine or paraxylylenediamine.
- ⁇ 7> The reactive polyamide resin according to any one of ⁇ 1> to ⁇ 5>, wherein the xylylenediamine is a mixture of metaxylylenediamine and paraxylylenediamine.
- ⁇ 8> The reactive polyamide resin according to any one of ⁇ 1> to ⁇ 7>, wherein the reaction molar ratio is 1.015 or less.
- the reactive functional group is present at a terminal of the polyamide resin, and is a carboxyl group or an amino group, and the terminal amino group concentration is 50 ⁇ eq / g or more, and any one of ⁇ 1> to ⁇ 8> Reactive polyamide resin.
- a polyamide resin composition comprising 0.5 to 100 parts by mass of an elastomer in 100 parts by mass of the reactive polyamide resin according to any one of ⁇ 1> to ⁇ 9>.
- the elastomer is an elastomer selected from a polyolefin-based elastomer, a diene-based elastomer, a polystyrene-based elastomer, a polyamide-based elastomer, a polyester-based elastomer, a polyurethane-based elastomer and a silicon-based elastomer, or an elastomer having a functional group introduced therein.
- the present invention it is possible to provide a polyamide resin having a low YI and capable of suppressing an increase in YI after heating. Further, the present invention is excellent in reactivity with the elastomer, and the effect of improving the impact resistance and flexibility by the elastomer can be made extremely high. And the molded product molded using the resin composition comprising the polyamide resin and elastomer of the present invention is excellent in impact resistance and flexibility, and is excellent in heat resistance, strength, and various mechanical properties. Various films, sheets, laminated films, laminated sheets, tubes, hoses, pipes, hollow containers, various containers such as bottles, various parts / members, industrial materials, industries, such as films, sheets, tubes, hoses, threads, fibers, etc. It can be suitably used for materials and household products.
- the polyamide resin of the present invention can be used for injection molding or laminating on a metal, or a component co-extruded on a metal plate or a metal tube covered.
- the polyamide resin of the present invention is a polycondensation of diamine (A) in which 70 mol% or more of diamine structural units are derived from xylylenediamine and dicarboxylic acid (B) in which 50 mol% or more of dicarboxylic acid structural units are derived from sebacic acid.
- the polyamide resin of the present invention has a diamine (A) in which 70 mol% or more of diamine structural units (structural units derived from diamine) are derived from xylylenediamine and 50 of dicarboxylic acid structural units (structural units derived from dicarboxylic acid). It is a reactive polyamide resin obtained by polycondensation of dicarboxylic acid (B) derived from sebacic acid by mol% or more.
- the diamine unit constituting the polyamide resin of the present invention needs to contain 70 mol% or more of xylylenediamine units, preferably 80 mol% or more, more preferably 90 mol% or more.
- a polyamide resin can express the outstanding elasticity modulus because the xylylenediamine unit in a diamine unit is 70 mol% or more.
- xylylenediamine metaxylylenediamine, paraxylylenediamine, and a mixture thereof are preferably used.
- metaxylylenediamine metaxylylenediamine, paraxylylenediamine, and a mixture thereof are preferably used.
- paraxylylenediamine By adding paraxylylenediamine to metaxylylenediamine as a diamine component, the melting point, glass transition point, heat resistance, and crystallization speed of the polyamide resin can be improved.
- the paraxylylenediamine in the diamine structural unit is preferably 20 mol% or more, more preferably 30 mol% or more, further preferably 40 mol% or more, and 60 % Or more is particularly preferable.
- Compounds that can constitute diamine units other than metaxylylenediamine and paraxylylenediamine units include tetramethylenediamine, pentamethylenediamine, 2-methylpentanediamine, hexamethylenediamine, heptamethylenediamine, octamethylenediamine, and nonamethylene.
- Aliphatic diamines such as diamine, decamethylenediamine, dodecamethylenediamine, 2,2,4-trimethyl-hexamethylenediamine, 2,4,4-trimethylhexamethylenediamine; 1,3-bis (aminomethyl) cyclohexane, 1,4-bis (aminomethyl) cyclohexane, 1,3-diaminocyclohexane, 1,4-diaminocyclohexane, bis (4-aminocyclohexyl) methane, 2,2-bis Alicyclic diamines such as (4-aminocyclohexyl) propane, bis (aminomethyl) decalin, bis (aminomethyl) tricyclodecane; Examples of diamines having an aromatic ring such as bis (4-aminophenyl) ether, paraphenylenediamine, bis (aminomethyl) naphthalene, and the like are not limited thereto.
- the dicarboxylic acid constituent units constituting the polyamide resin of the present invention needs to be derived from sebacic acid.
- the structural unit derived from sebacic acid is less than 50 mol% in the dicarboxylic acid structural unit, the moisture content of the polyamide resin increases and water absorption (hygroscopicity) increases. Moreover, since the density increases, the weight of the obtained molded product increases.
- the constituent unit derived from sebacic acid in the dicarboxylic acid constituent unit is preferably 75 to 100 mol%, more preferably 90 to 100 mol%.
- Such sebacic acid is preferably derived from a plant. Since plant-derived sebacic acid contains sulfur compounds and sodium compounds as impurities, polyamide resins having plant-derived sebacic acid as a constituent unit are not easily yellowed without the addition of an antioxidant and can be obtained. The YI of the molded product is also low. Moreover, it is preferable to use plant-derived sebacic acid without excessive purification of impurities. Since it is not necessary to purify excessively, it is advantageous in terms of cost.
- sebacic acid preferably has a sulfur atom concentration of 1 to 200 ppm, more preferably 10 to 150 ppm, and particularly preferably 20 to 100 ppm.
- a sulfur atom concentration of 1 to 200 ppm, more preferably 10 to 150 ppm, and particularly preferably 20 to 100 ppm.
- sebacic acid preferably has a sodium atom concentration of 1 to 500 ppm, more preferably 10 to 300 ppm, and particularly preferably 20 to 200 ppm.
- the reactivity when synthesizing the polyamide resin is good, and it becomes easy to control to an appropriate molecular weight range.
- thickening can be suppressed when the polyamide resin is melt-molded, and the moldability tends to be good and the formation of kogation can be suppressed during the molding process, so the quality of the resulting molded product tends to be good.
- compounding a polyamide resin and a glass filler or the like it tends to be easy to suppress the generation of so-called resin-degraded products such as eyes that are generated in the die.
- the purity of sebacic acid in the case of plant origin is preferably 99 to 100% by mass, more preferably 99.5 to 100% by mass, and further preferably 99.6 to 100% by mass. This range is preferred because the quality of the resulting polyamide resin is good and does not affect the polymerization.
- the dicarboxylic acid such as 1,10-decamethylenedicarboxylic acid contained in sebacic acid is preferably 0 to 1% by mass, more preferably 0 to 0.7% by mass, and still more preferably 0 to 0.6% by mass. .
- This range is preferred because the quality of the resulting polyamide resin is good and does not affect the polymerization.
- the monocarboxylic acid such as octanoic acid, nonanoic acid, and undecanoic acid contained in sebacic acid is preferably 0 to 1% by mass, more preferably 0 to 0.5% by mass, and further 0 to 0.4% by mass. preferable. This range is preferred because the quality of the resulting polyamide resin is good and does not affect the polymerization.
- the hue of sebacic acid is preferably 100 or less, more preferably 75 or less, and even more preferably 50 or less. This range is preferable because YI of the obtained polyamide resin is low.
- APHA can be measured by a standard oil analysis test method of the Japan Oil Chemists' Society.
- dicarboxylic acid component other than sebacic acid that can be used in the production of the polyamide resin
- other dicarboxylic acid components mainly containing an ⁇ , ⁇ -linear aliphatic dicarboxylic acid having 4 to 20 carbon atoms are preferable.
- adipic acid adipic acid
- aliphatic dicarboxylic acids such as succinic acid, glutaric acid, pimelic acid, suberic acid, azelaic acid, undecanedioic acid, and dodecanedioic acid.
- adipic acid When using dicarboxylic acid components other than sebacic acid, it is preferable to use adipic acid, undecanedioic acid, dodecanedioic acid, etc., and adipic acid is particularly preferable.
- adipic acid By using adipic acid in combination, it becomes easy to control the elastic modulus, water absorption, and crystallinity.
- the amount of adipic acid is more preferably 40 mol% or less, and further preferably 30 mol% or less.
- it is preferable to use undecanedioic acid and dodecanedioic acid because the specific gravity of the polyamide resin is reduced and the molded product is reduced in weight.
- ⁇ ⁇ -linear aliphatic dicarboxylic acid having 4 to 20 carbon atoms other than sebacic acid is used, the proportion used is less than 50 mol%, preferably 40 mol% or less.
- aromatic dicarboxylic acids such as terephthalic acid, isophthalic acid, and 2,6-naphthalenedicarboxylic acid can be used, and these can be used in combination.
- diamine component and dicarboxylic acid component as a component constituting the polyamide resin, lactams such as ⁇ -caprolactam and laurolactam, fats such as aminocaproic acid, aminoundecanoic acid and the like are included as long as the effects of the present invention are not impaired.
- Group aminocarboxylic acids can also be used as copolymerization components.
- the most preferred polyamide resin is polymetaxylylene sebacamide resin, polyparaxylylene sebacamide resin, and mixed xylylenediamine of metaxylylenediamine and paraxylylenediamine with polycondensation with sebacic acid. This is a polymetaxylylene / paraxylylene mixed sebacamide resin. These polyamide resins tend to have particularly good moldability.
- the polyamide resin of the present invention needs to have a reactive functional group concentration of 100 ⁇ eq / g or more and a reaction molar ratio of 1.0 or more.
- the reactive functional group concentration refers to the concentration ( ⁇ eq / g) of reactive groups present on the terminal and main chain or side chain of the polyamide resin, and the reactive group is typically an amino group. And a carboxyl group.
- the reactive functional group concentration at the terminal may be substantially equal to the reactive functional group concentration of the entire polymer, Such an embodiment is preferred in the present invention.
- the polyamide resin of the present invention can be preferably used also when it is used for a composite of a polyamide resin molded article and a metal.
- the reactive functional group concentration is preferably 130 ⁇ eq / g or more, more preferably 140 ⁇ eq / g or more, further 150 ⁇ eq / g or more, and particularly 160 ⁇ eq / g or more.
- the upper limit is preferably 250 ⁇ eq / g or less, more preferably 230 ⁇ eq / g or less, further 210 ⁇ eq / g or less, and particularly 200 ⁇ eq / g or less.
- it is particularly preferable that the total concentration of terminal amino groups and terminal carboxyl groups in the polyamide resin is within the range of the reactive functional group concentration.
- the polyamide resin of the present invention has a reaction molar ratio, that is, a molar ratio of reacted diamine to reacted dicarboxylic acid (number of reacted diamine / number of reacted dicarboxylic acid) is 1.0 or more. I need. By setting it to 1.0 or more, it is possible to improve the impact resistance and flexibility by using an amino group-rich polyamide resin and by setting a high reactive functional group concentration as described above. Moreover, even if the polyamide resin of this invention is heated by making reaction molar ratio into the above-mentioned range, YI increase can be reduced effectively.
- the reaction molar ratio (r) is preferably 1.001 or more, more preferably 1.003 or more, particularly 1.005 or more, and the upper limit is usually 1.03 or less, more preferably 1.02 or less. Especially preferably, it is 1.015 or less. Within this range, the reactivity of the polyamide resin during polymerization is good, and a resin with excellent quality can be obtained with little deterioration during polymerization.
- reaction molar ratio (r) can be obtained from the following formula based on the Journal of Industrial Chemistry, Vol. 74, No. 7, (1971), pages 162-167.
- r (1-cN-b (CN)) / (1-cC + a (CN))
- M 1/2 b M 2/2
- c 18.015 (molecular weight of water (g / mol))
- M 1 Molecular weight of diamine (g / mol)
- M 2 Molecular weight of dicarboxylic acid (g / mol)
- N Amino group concentration (eq / g)
- C Carboxyl group concentration (eq / g)
- the diamine component, the synthesis of the polyamide resin from a molecular weight different monomers as the carboxylic acid component to say that M 1 and M 2, which is calculated in accordance with the mixing ratio of the monomers to be blended as a raw material (molar ratio)
- M 1 and M 2 which is calculated in accordance with the mixing ratio of the monomers to be blended as a raw material (molar ratio)
- M 1 and M 2 which is calculated in accordance with the mixing ratio of the monomers to be blended as a raw material (molar ratio)
- M 1 and M 2 which is calculated in accordance with the mixing ratio of the monomers to be blended as a raw material (molar ratio)
- M 1 and M 2 which is calculated in accordance with the mixing ratio of the monomers to be blended as a raw material (molar ratio)
- the reaction molar ratio means the molar ratio of the actually reacted monomer obtained from the end group concentration of the finished polyamide resin.
- N is preferably the terminal amino group concentration
- C is preferably the
- the amino group concentration (preferably, terminal amino group concentration, [NH 2 ]) of the polyamide resin of the present invention is preferably 50 ⁇ eq / g or more, more preferably 70 ⁇ eq / g or more, still more preferably 90 ⁇ eq / g or more, Especially preferably, it is 100 or more.
- the upper limit is preferably 200 ⁇ eq / g or less, more preferably 160 ⁇ eq / g or less, still more preferably 150 ⁇ eq / g or less, and particularly preferably 130 or less.
- the reaction molar ratio described above is used, and further, the amino group concentration (preferably the terminal amino group concentration) is 50 ⁇ eq / g or more, so that the increase in YI is more effective even when the polyamide resin of the present invention is heated. Can be reduced. So far, it has been thought that if the amino group in the polyamide resin is excessive, gelation and increase in YI tend to proceed during the melt residence, and the heat resistance is poor. Surprisingly, however, it has been found that the polyamide resin of the present invention can suppress an increase in YI upon heating if the amino group is excessive.
- the generation of colored substances is suppressed or generated due to the fact that 50 mol% or more of the dicarboxylic acid structural units are derived from sebacic acid or the interaction of some terminal groups. It is assumed that the substance and the terminal group are prevented from reacting and yellowing.
- the polyamide resin is used in a heating environment such as an LED reflector, for example, it is required to improve heat aging resistance and to suppress an increase in YI during heating. It can be preferably applied to various purposes. Moreover, the above-mentioned range is preferable also from a viewpoint of adhesiveness with a metal interface.
- the carboxyl group concentration (preferably, terminal carboxyl group concentration, [COOH]) is preferably less than 100 ⁇ eq / g, more preferably 10 to 80 ⁇ eq / g, still more preferably 20 to 70 ⁇ eq / g, and 30 to 60. It is preferable.
- the amino group concentration can be measured by dissolving 0.5 g of polyamide resin in 30 ml of a phenol / methanol (4: 1) mixed solution with stirring at 20 to 30 ° C. and titrating with 0.01 N hydrochloric acid.
- carboxyl group concentration 0.1 g of polyamide resin is dissolved in 30 ml of benzyl alcohol at 200 ° C., and 0.1 ml of phenol red solution is added in the range of 160 ° C. to 165 ° C.
- the solution was titrated with a titration solution (KOH concentration 0.01 mol / l) in which 0.132 g of KOH was dissolved in 200 ml of benzyl alcohol, and when the color change changed from yellow to red, the end point was reached. Can be calculated.
- the reactive functional group concentration of the polyamide resin is adjusted by adjusting the molar ratio of raw material dicarboxylic acid and diamine, reaction time, reaction temperature, dropping rate of xylylenediamine, pressure in the kettle, pressure reduction start timing, pressure reducer, total compression This is possible by setting the reaction conditions such as the vessel structure, the type of filler and the holding temperature to appropriate values.
- the reaction molar ratio (r) of the polyamide resin is adjusted by adjusting the raw dicarboxylic acid and diamine molar ratio, the reaction time, the reaction temperature, the xylylenediamine dropping speed, the pressure in the kettle, the pressure reduction start timing, and the pressure reducer. It is possible by setting the reaction conditions such as the structure of the total condenser, the type of filler and the holding temperature to appropriate values.
- the production method of the polyamide resin is a so-called salt method, in order to set the reaction molar ratio to 1.0 or more, specifically, for example, the component ratio of raw material diamine / raw material dicarboxylic acid is set within this range, The reaction should be advanced sufficiently.
- diamine is dropped excessively from the target value and refluxed during dropping of the diamine. It is also possible to control the amount and remove the dropped diamine from the reaction system. Specifically, by controlling the temperature of the reflux tower to the optimum range and controlling the packed tower packing, so-called Raschig ring, Lessing ring, saddle, etc., to an appropriate shape and filling amount, it is excessive than the target value. What is necessary is just to remove a diamine out of the system.
- the unreacted diamine excess than a target value can also be removed out of the system also by shortening the reaction time after diamine dripping. Furthermore, the unreacted diamine excess than the target value can be removed from the reaction system as required by controlling the dropping rate of the diamine.
- the production method of the polyamide resin is not particularly limited, and is produced by a conventionally known method and polymerization conditions.
- a small amount of monoamine or monocarboxylic acid may be added as a molecular weight regulator during the polycondensation of the polyamide resin.
- a salt composed of a diamine component containing xylylenediamine and a dicarboxylic acid containing sebacic acid is heated in a pressurized state in the presence of water and polymerized in a molten state while removing added water and condensed water.
- diamine is continuously added to the dicarboxylic acid, while the temperature of the reaction system is raised so that the reaction temperature does not fall below the melting point of the generated oligoamide and polyamide. The polycondensation proceeds.
- the polyamide resin may be subjected to solid phase polymerization after being produced by a melt polymerization method.
- the method of solid phase polymerization is not particularly limited, and it is produced by a conventionally known method and polymerization conditions.
- phosphorus is unavoidably present, but the amount is preferably 1 to 500 ppm in terms of phosphorus atom concentration. More preferably, it is 5 to 300 ppm, and still more preferably 10 to 200 ppm. If the phosphorus atom concentration is less than 1 ppm, the polyamide resin tends to yellow, and if it exceeds 500 ppm, it may be difficult to control the polymerization due to an excessive amidation reaction during the synthesis of the polyamide resin.
- hypophosphite compounds as antioxidants include hypophosphorous acid; hypophosphorous acid metal salts such as sodium hypophosphite, potassium hypophosphite, lithium hypophosphite; hypophosphorous acid Hypophosphorous acid compounds such as ethyl acid, dimethylphosphinic acid, phenylmethylphosphinic acid, phenylphosphonous acid, and ethyl phenylphosphonous acid; phenyls such as sodium phenylphosphonous acid, potassium phenylphosphonous acid, and lithium phenylphosphonous acid Examples thereof include phosphonous acid metal salts.
- the phosphite compound include phosphorous acid, pyrophosphorous acid; metal phosphites such as sodium hydrogen phosphite and sodium phosphite; triethyl phosphite, triphenyl phosphite, ethylphosphone Phosphorous acid compounds such as acid, phenylphosphonic acid, diethyl phenylphosphonate; phenylphosphonic acid metal salts such as sodium ethylphosphonate, potassium ethylphosphonate, sodium phenylphosphonate, potassium phenylphosphonate, lithium phenylphosphonate, etc. Can be mentioned.
- preferred antioxidants are hyponitrogen such as sodium hypophosphite, potassium hypophosphite, lithium hypophosphite and the like from the viewpoint of the effect of promoting the polymerization reaction of the polyamide resin and the anti-coloring effect.
- hyponitrogen such as sodium hypophosphite, potassium hypophosphite, lithium hypophosphite and the like from the viewpoint of the effect of promoting the polymerization reaction of the polyamide resin and the anti-coloring effect.
- Metal phosphates are preferred and sodium hypophosphite is particularly preferred.
- the polyamide resin of the present invention preferably has a number average molecular weight (Mn) of 20,000 or less, usually 6,000 to 20,000.
- Mn number average molecular weight
- a more preferred number average molecular weight (Mn) is 8,000 to 17,000, further 9,000 to 15,000, particularly 10,000 to 14,000, and in particular 11,000 to 13 , 000. Within such a range, the reactivity is good, the dispersibility is good, and the moldability is good.
- the number average molecular weight (Mn) here is calculated from the terminal amino group concentration [NH 2 ] ( ⁇ eq / g) and the terminal carboxyl group concentration [COOH] ( ⁇ eq / g) of the polyamide resin by the following equation.
- the Number average molecular weight (Mn) 2,000,000 / ([COOH] + [NH 2 ])
- the polyamide resin of the present invention preferably has a molecular weight distribution (Mw / Mn, weight average molecular weight / number average molecular weight) of 1.8 to 3.1.
- the molecular weight distribution is more preferably 1.9 to 3.0, still more preferably 2.0 to 2.9.
- the molecular weight distribution of the polyamide resin can be adjusted, for example, by appropriately selecting the polymerization reaction conditions such as the type and amount of the initiator and catalyst used during polymerization, the reaction temperature, pressure, and time. It can also be adjusted by mixing a plurality of types of XD10 polyamide resins having different average molecular weights obtained under different polymerization conditions or by separately precipitating the polyamide resin after polymerization.
- the molecular weight distribution Mw / Mn can be determined by GPC measurement. Specifically, two instruments, “HLC-8320GPC” manufactured by Tosoh Corporation, and two “TSK gel Super HM-H” manufactured by Tosoh Corporation are used as columns. , Measured under conditions of eluent hexafluoroisopropanol (HFIP) with sodium trifluoroacetate concentration of 10 mmol / l, resin concentration of 0.02% by mass, column temperature of 40 ° C., flow rate of 0.3 ml / min, refractive index detector (RI) It can be obtained as a standard polymethyl methacrylate equivalent value. A calibration curve is prepared by dissolving 6 levels of PMMA in HFIP.
- HFIP hexafluoroisopropanol
- the polyamide resin of the present invention has a melt viscosity of 50 to 1200 Pa ⁇ s when measured under the conditions of the melting point of the polyamide resin + 30 ° C., the shear rate of 122 sec ⁇ 1 , and the moisture content of the polyamide resin of 0.06% by mass or less. It is preferable that it is s. By setting the melt viscosity to such a range, the molding processability is improved. A more preferable range of the melt viscosity is 60 to 700 Pa ⁇ s, more preferably 70 to 500 Pa ⁇ s.
- the melt viscosity of the polyamide resin can be adjusted, for example, by appropriately selecting the charging ratio of the raw material dicarboxylic acid component and the diamine component, the polymerization catalyst, the molecular weight regulator, the polymerization temperature, and the polymerization time.
- the melting point of the polyamide resin of the present invention is preferably 150 to 310 ° C, more preferably 180 to 300 ° C.
- the polyamide resin of the present invention is also preferably a polyamide resin having two or more melting points. Polyamide resins having two or more melting points are preferred because they tend to improve heat resistance and moldability.
- the glass transition point of the polyamide resin is preferably 50 to 100 ° C., more preferably 55 to 100 ° C., and particularly preferably 60 to 100 ° C. Within this range, the heat resistance tends to be good.
- fusing point is the temperature of the peak top of the endothermic peak at the time of temperature rising observed by DSC (differential scanning calorimetry) method.
- DSC differential scanning calorimetry
- the melting point can be determined from the temperature at the peak top of the endothermic peak observed when the mixture is heated from room temperature to a temperature higher than the expected melting point.
- the melted polyamide resin is rapidly cooled with dry ice, and the temperature is raised again to a temperature equal to or higher than the melting point at a rate of 10 ° C./min, whereby the glass transition point can be obtained.
- the polyamide resin of the present invention can be mixed with other polyamide resins other than the xylylenediamine-based polyamide resin.
- Other polyamide resins include polyamide 66, polyamide 6, polyamide 46, polyamide 6/66, polyamide 10, polyamide 612, polyamide 11, polyamide 12, hexamethylene diamine, adipic acid and terephthalic acid polyamide 66 / 6T, hexa And polyamide 6I / 6T made of methylenediamine, isophthalic acid and terephthalic acid.
- one or a plurality of resins such as polyester resin, polyolefin resin, polyphenylene sulfide resin, polycarbonate resin, polyphenylene ether resin, modified polyphenylene ether resin, and polystyrene resin can be blended as long as the objects and effects of the present invention are not impaired. .
- the polyamide resin of the present invention preferably contains a polyphenylene ether resin or a modified polyphenylene ether resin, and the polyphenylene ether resin may be a homopolymer, a copolymer or a graft polymer.
- polyphenylene ether resins include poly (2,6 dimethyl-1,4-phenylene) ether, poly (2,6-diethyl-1,4-phenylene) ether, and poly (2,6-dipropyl-1). , 4-phenylene) ether, poly (2-methyl-6-ethyl-1,4-phenylene) ether, poly (2-methyl-6-propyl-1,4-phenylene) ether, and the like.
- the modified polyphenylene ether resin is obtained by reacting a polyphenylene ether resin with an unsaturated aliphatic carboxylic acid or an acid anhydride thereof.
- a modified polyphenylene ether resin is obtained by reacting the acid anhydride and the polyphenylene ether resin in a melt-mixed state in the absence of a catalyst.
- a kneader, a Banbury mixer, an extruder, or the like can be used as a method of melt mixing.
- the acid anhydride of the unsaturated aliphatic carboxylic acid include maleic anhydride, itaconic anhydride, citraconic anhydride, etc. Among them, maleic anhydride is particularly preferable.
- the proportion of the carboxylic acid or acid anhydride used for modification of the polyphenylene ether resin is preferably 0.01 to 10 parts by mass, more preferably 0.1 to 3 parts per 100 parts by mass of the polyphenylene ether resin. Part by mass, particularly preferably 0.1 to 1 part by mass.
- the proportion of the acid anhydride used is less than 0.01 parts by mass with respect to 100 parts by mass of the polyphenylene ether resin, the composition has a toughness with little effect of improving the compatibility between the polyphenylene ether resin and the polyamide resin.
- the amount exceeds 10 parts by mass there are disadvantages such as excessive acid anhydride being thermally decomposed, which tends to cause practical inconveniences such as reduced heat resistance and poor appearance.
- radical generators such as a benzoyl peroxide, a dicumyl peroxide, a cumene hydroperoxide, can be used as a catalyst as needed.
- the blending ratio of the modified polyphenylene ether to the polyamide resin can be selected within a wide range, but preferably 1 to 50 parts by weight, particularly preferably 3 to 40 parts by weight of the modified polyphenylene ether resin with respect to 100 parts by weight of the polyamide resin. It is. When the blending ratio of the modified polyphenylene ether is less than the above range, the effect of improving the heat resistance and water absorption is small, and when it is more than the above range, the fluidity of the molten resin is lowered during the molding process, which is not preferable.
- modified polyphenylene ether resin a product obtained by reacting a composition comprising a polyphenylene ether resin and an elastomer with an unsaturated aliphatic carboxylic acid or an acid anhydride thereof can be used.
- the reactive polyamide resin of the present invention is excellent in reactivity with an elastomer, and can greatly enhance the impact resistance and flexibility improvement effect of the elastomer. Therefore, the reactive polyamide resin of the present invention can be preferably used as a polyamide resin composition containing an elastomer. Elastomers are those that improve impact strength, and there are no restrictions on the type, and any rubber polymer (including thermoplastic elastomers) can be used.
- polyolefin elastomers diene elastomers, polystyrene
- Known elastomers such as elastomers, polyamide elastomers, polyester elastomers, polyurethane elastomers, and silicon elastomers can be used.
- polyolefin elastomers examples include polyisobutylene, ethylene-propylene copolymer (EPR), ethylene-propylene-butadiene copolymer (EPDM), ethylene-propylene-nonconjugated diene copolymer, and ethylene-butene-1 copolymer.
- EPR ethylene-propylene copolymer
- EPDM ethylene-propylene-butadiene copolymer
- EPDM ethylene-propylene-nonconjugated diene copolymer
- ethylene-butene-1 copolymer examples include polyisobutylene, ethylene-propylene copolymer (EPR), ethylene-propylene-butadiene copolymer (EPDM), ethylene-propylene-nonconjugated diene copolymer, and ethylene-butene-1 copolymer.
- Polymer ethylene-propylene-butene-1 copolymer, ethylene-hexene-1 copolymer, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, ethylene-glycidyl
- examples thereof include an acrylate copolymer, an ethylene-glycidyl methacrylate copolymer, an ethylene-vinyl acetate-glycidyl methacrylate copolymer, an ethylene-maleic acid copolymer, and an ethylene-maleic anhydride copolymer.
- diene elastomer examples include polybutadiene and its hydrogenated product, polyisoprene and its hydrogenated product, butadiene-styrene random copolymer and its hydrogenated product, and the like.
- polystyrene elastomers include block copolymers of vinyl aromatic compounds, conjugated diene compounds and olefin compounds, or hydrogenated products of these block copolymers (hereinafter abbreviated as hydrogenated block copolymers).
- examples thereof include a hydrogenated block copolymer obtained by hydrogenating 80% or more of the aliphatic double bond based on the conjugated diene compound in the block copolymer.
- the vinyl aromatic compound constituting the polystyrene elastomer one or more kinds can be selected from styrene, ⁇ -methylstyrene, vinyltoluene, p-tert-butylstyrene, 1,1-diphenylethylene, etc. preferable.
- the conjugated diene compound for example, one or more kinds can be selected from butadiene, isoprene, 1,3-pentadiene, 2,3-dimethyl-1,3-butadiene, etc. Among them, butadiene, isoprene, and these A combination is preferred.
- a hydrogenated block copolymer SEBS in which styrene, ethylene and butadiene are combined is preferable.
- preferred elastomers include polyolefin-based elastomers, diene-based elastomers, polystyrene-based elastomers, and the like, and functional groups such as carboxyl groups, acid anhydride groups, and epoxy groups as described below.
- An elastomer having a group may be mentioned.
- the functional group may be introduced (chemical modification or modification by copolymerization, etc.) in order to further impart compatibility. preferable.
- the elastomer which has the compatibility itself with respect to a polyamide resin you may use as it is, without doing this.
- the functional group can be introduced into an elastomer having no functional group (for example, a polyolefin-based elastomer) in the presence or absence of a radical initiator, ⁇ , ⁇ -unsaturated carboxylic acid, acrylamide, epoxy compound or the like.
- a radical initiator for example, a radical initiator, ⁇ , ⁇ -unsaturated carboxylic acid, acrylamide, epoxy compound or the like.
- One or more compounds selected from these derivatives are reacted, for example, in an amount of 0.01 to 10 parts by mass with respect to 100 parts by mass of the elastomer.
- ⁇ , ⁇ -unsaturated carboxylic acids and derivatives thereof include maleic acid, maleic anhydride, fumaric acid, itaconic acid, acrylic acid, glycidyl acrylate, 2-hydroxyethyl acrylate, methacrylic acid, glycidyl methacrylate, 2- Hydroxyethyl methacrylate, crotonic acid, cis-4-cyclohexene-1,2-dicarboxylic acid and its anhydride, endo-cis-bicyclo ⁇ 2.2.1 ⁇ -5-heptene-2,3-dicarboxylic acid and its anhydride Products, maleimide compounds and the like.
- the radical initiator used as necessary when introducing the functional group is not particularly limited, and examples thereof include dicumyl peroxide, di-tert-butyl peroxide, tert-butyl cumyl peroxide, 2,5-dimethyl-2,5-di (tert-butylperoxy) hexane, 2,5-dimethyl-2,5-di (tert-butylperoxy) hexane-3, n-butyl-4,4-bis ( organic peroxide systems such as tert-butylperoxy) valerate, 1,1-bis (tert-butylperoxy) -3,3,5-trimethylcyclohexane, tert-butylperoxytriphenylsilane and tert-butylperoxytrimethylsilane 2,3-dimethyl-2,3-diphenylbutane, 2,3-die Le-2,3-diphenyl butane, 2,3-dimethyl-2,3-bis (
- the amount of the radical initiator used is usually 0.01 to 10 parts by mass, preferably 0.05 to 5 parts by mass with respect to 100 parts by mass of the elastomer into which the functional group is introduced.
- the reaction for introducing a functional group can be carried out according to a known method, for example, by a method such as melt kneading or solution mixing.
- the blending amount of the elastomer is preferably selected in a range of 0.5 to 100 parts by mass with respect to 100 parts by mass of the reactive polyamide resin. If the amount of the elastomer is less than 0.5 parts by mass, the effect of improving the strength by blending the elastomer is insufficient, and if it exceeds 100 parts by mass, the molded product obtained from the polyamide resin composition Mechanical properties such as strength are reduced.
- the blending amount of the elastomer is more preferably 1 to 50 parts by mass, and more preferably 3 to 30 parts by mass with respect to 100 parts by mass of the reactive polyamide resin.
- a polyamide resin composition obtained by blending an elastomer with a reactive polyamide resin when the resin composition is molded into a molded product, the reactive polyamide resin and part of the elastomer may react.
- the reaction means an ionic bond, a hydrogen bond, a dehydration reaction, a condensation reaction, and the like, and is preferable because the dispersibility becomes good when the reactive polyamide resin and the elastomer react.
- an antioxidant such as a heat stabilizer, a hydrolysis resistance improver, a weather resistance stabilizer, a filler, a matting agent, as long as the effects of the present invention are not impaired.
- Additives such as an ultraviolet absorber, a nucleating agent, a plasticizer, a dispersant, a flame retardant, an antistatic agent, an anti-coloring agent, an anti-gelling agent, a coloring agent, and a release agent can be added.
- the polyamide resin composition of the present invention preferably contains a stabilizer (antioxidant, heat stabilizer).
- a stabilizer antioxidant, heat stabilizer
- examples of the stabilizer include phosphorus-based, hindered phenol-based, hindered amine-based, oxalic acid anilide-based, organic sulfur-based, aromatic secondary amine-based organic stabilizers, amine-based antioxidants, copper compounds, and the like.
- Inorganic stabilizers such as halides are preferred.
- a phosphorus stabilizer a phosphite compound and a phosphonite compound are preferable.
- phosphite compound examples include distearyl pentaerythritol diphosphite, dinonylphenyl pentaerythritol diphosphite, bis (2,4-di-t-butylphenyl) pentaerythritol diphosphite, bis (2,6- Di-t-butyl-4-methylphenyl) pentaerythritol diphosphite, bis (2,6-di-t-butyl-4-ethylphenyl) pentaerythritol diphosphite, bis (2,6-di-t- Butyl-4-isopropylphenyl) pentaerythritol diphosphite, bis (2,4,6-tri-t-butylphenyl) pentaerythritol diphosphite, bis (2,6-di-t-butyl-4-sec-) Butylphenyl) penta
- Examples of the phosphonite compound include tetrakis (2,4-di-t-butylphenyl) -4,4′-biphenylenediphosphonite, tetrakis (2,5-di-t-butylphenyl) -4,4′-.
- hindered phenol stabilizer examples include n-octadecyl-3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate, 1,6-hexanediol-bis [3- (3,5 -Di-t-butyl-4-hydroxyphenyl) propionate], pentaerythritol tetrakis [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate], 3,9-bis [1,1- Dimethyl-2- ⁇ - (3-t-butyl-4-hydroxy-5-methylphenyl) propionyloxy ⁇ ethyl] -2,4,8,10-tetraoxaspiro [5,5] undecane, triethylene glycol -Bis [3- (3-tert-butyl-5-methyl-4-hydroxyphenyl) propionate], 3,5-di-tert-butyl-4-hydride Xylbenzylphosphonate-
- hindered amine stabilizer examples include known hindered amine compounds having a 2,2,6,6-tetramethylpiperidine skeleton.
- 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-benzyloxy-2, 2,6,6-tetramethylpiperidine, 4-phenoxy-2,2,6,6-tetramethylpiperidine, 4-ethylcarba Yl
- ADK STAB As a product of a hindered amine stabilizer, a product “ADK STAB” LA-52, LA-57, LA-62, LA-67, LA-63P, LA-68LD, LA-made by ADEKA Corporation (ADEKA CORPORATION) is available.
- An amine antioxidant refers to an amine compound other than the above-mentioned hindered amine stabilizer.
- N-phenylbenzeneamine and 2,4,4 which are commercially available from Ciba Specialty Chemicals under the trade names Reaction product with 4-trimethylpentene (IRGANOX 5057), octylated diphenylamine (NOCRAC) commercially available under the trade name from Ouchi Shinko Chemical Ind.
- oxalic acid anilide-based stabilizer 4,4′-dioctyloxyoxanilide, 2,2′-diethoxyoxanilide, 2,2′-dioctyloxy-5,5′-di-tert Tributoxanilide, 2,2′-didodecyloxy-5,5′-di-tert-butoxanilide, 2-ethoxy-2′-ethyloxanilide, N, N′-bis (3-dimethylaminopropyl) oxanilide, 2-ethoxy-5-tert-butyl-2'-ethoxanilide and its mixture with 2-ethoxy-2'-ethyl-5,4'-di-tert-butoxanilide, o- and p-methoxy-disubstituted oxanilides Mixtures, o- and p-ethoxy-disubstituted oxanilide mixtures,
- organic sulfur stabilizer examples include didodecyl thiodipropionate, ditetradecyl thiodipropionate, dioctadecyl thiodipropionate, pentaerythritol tetrakis (3-dodecyl thiopropionate), thiobis (N-phenyl).
- 2-mercaptobenzothiazole 2-mercaptobenzimidazole, 2-mercaptomethylbenzimidazole, and mercaptobenzimidazole compounds
- metal salts of 2-mercaptobenzimidazole diethyldithiocarbamine
- Dithiocarbamic acid compounds such as metal salts of acids and metal salts of dibutyldithiocarbamic acid
- thioureas such as 1,3-bis (dimethylaminopropyl) -2-thiourea and tributylthiourea
- tetramethylthiuram monosulfide, tetramethylthiuram disulfide, nickel dibutyldithiocarbamate, nickel isopropyl xanthate include trilauryl trithiophosphite and the like.
- mercaptobenzimidazole compounds dithiocarbamic acid compounds, thiourea compounds, and organic thioacid compounds are preferable, and mercaptobenzimidazole compounds and organic thioacid compounds are more preferable.
- a thioether-based compound having a thioether structure can be suitably used because it receives oxygen from an oxidized substance and reduces it.
- 2-mercaptobenzimidazole, 2-mercaptomethylbenzimidazole, ditetradecylthiodipropionate, dioctadecylthiodipropionate, pentaerythritol tetrakis (3-dodecylthiopropionate) are more preferable.
- Tetradecylthiodipropionate, pentaerythritol tetrakis (3-dodecylthiopropionate) and 2-mercaptomethylbenzimidazole are more preferred, and pentaerythritol tetrakis (3-dodecylthiopropionate) is particularly preferred.
- the molecular weight of the organic sulfur compound is usually 200 or more, preferably 500 or more, and the upper limit is usually 3,000.
- a compound having a diphenylamine skeleton, a compound having a phenylnaphthylamine skeleton, and a compound having a dinaphthylamine skeleton are preferable, and a compound having a diphenylamine skeleton and a compound having a phenylnaphthylamine skeleton are more preferable.
- p, p′-dialkyldiphenylamine (the alkyl group has 8 to 14 carbon atoms), octylated diphenylamine, 4,4′-bis ( ⁇ , ⁇ -dimethylbenzyl) diphenylamine, p- (p-toluene) Sulfonylamido) diphenylamine, N, N'-diphenyl-p-phenylenediamine, N-phenyl-N'-isopropyl-p-phenylenediamine, N-phenyl-N '-(1,3-dimethylbutyl) -p-phenylene
- a diphenylamine skeleton such as diamine and N-phenyl-N ′-(3-methacryloyloxy-2-hydroxypropyl) -p-phenylenediamine, N-phenyl-1-naphthylamine and N, N′-di-2- Compounds having a dipheny
- 4,4′-bis ( ⁇ , ⁇ -dimethylbenzyl) diphenylamine, N, N′-di-2-naphthyl-p-phenylenediamine and N, N′-diphenyl-p-phenylenediamine are more preferable, N, N′-di-2-naphthyl-p-phenylenediamine and 4,4′-bis ( ⁇ , ⁇ -dimethylbenzyl) diphenylamine are particularly preferred.
- the organic sulfur stabilizer or aromatic secondary amine stabilizer When the organic sulfur stabilizer or aromatic secondary amine stabilizer is blended, it is preferable to use these in combination. By using these in combination, the heat aging resistance tends to be better than when they are used alone.
- an organic sulfur stabilizer and an aromatic secondary amine stabilizer As a more preferred combination of an organic sulfur stabilizer and an aromatic secondary amine stabilizer, ditetradecylthiodipropionate, 2-mercaptomethylbenzimidazole and pentaerythritol are used as the organic sulfur stabilizer.
- At least one selected from tetrakis (3-dodecylthiopropionate) and an aromatic secondary amine stabilizer are 4,4′-bis ( ⁇ , ⁇ -dimethylbenzyl) diphenylamine and N, N′— Examples thereof include a combination with at least one selected from di-2-naphthyl-p-phenylenediamine.
- the organic sulfur stabilizer is pentaerythritol tetrakis (3-dodecylthiopropionate), and the aromatic secondary amine stabilizer is N, N′-di-2-naphthyl-p-phenylenediamine. Is more preferable.
- the content ratio (mass ratio) in the polyamide resin composition is such that the aromatic secondary amine stabilizer /
- the organic sulfur stabilizer is preferably 0.05 to 15, more preferably 0.1 to 5, and further preferably 0.2 to 2. By setting it as such content ratio, heat aging resistance can be improved efficiently, maintaining barrier property.
- the inorganic stabilizer a copper compound and a halide are preferable.
- the copper compound is a copper salt of various inorganic acids or organic acids, and excludes halides described later.
- the copper may be either cuprous or cupric.
- Specific examples of the copper salt include copper chloride, copper bromide, copper iodide, copper phosphate, copper stearate, hydrotalcite, and styhite. And natural minerals such as pyrolite.
- halide used as the inorganic stabilizer examples include, for example, alkali metal or alkaline earth metal halides; ammonium halides and quaternary ammonium halides of organic compounds; alkyl halides, allyl halides. Specific examples thereof include ammonium iodide, stearyltriethylammonium bromide, benzyltriethylammonium iodide, and the like. Among these, alkali metal halide salts such as potassium chloride, sodium chloride, potassium bromide, potassium iodide, sodium iodide and the like are preferable.
- a combined use of a copper compound and a halide is preferable because it exhibits excellent effects in terms of heat discoloration and weather resistance (light resistance).
- a copper compound when used alone, the molded product may be colored reddish brown by copper, and this coloring is not preferable depending on the application. In this case, discoloration to reddish brown can be prevented by using a copper compound and a halide together.
- amine-based antioxidants from the viewpoint of processing stability during heating and pressurization, heat aging resistance, film appearance, and coloration prevention, in particular, amine-based antioxidants, inorganic, organic sulfur-based, Aromatic secondary amine stabilizers are particularly preferred.
- the preferable content of the stabilizer is usually 0.01 to 1 part by mass, more preferably 0.01 to 0.8 part by mass with respect to 100 parts by mass of the polyamide resin.
- [4.2 Hydrolysis resistance improver-carbodiimide compound] It is preferable to mix
- Preferred examples of the carbodiimide compound include aromatic, aliphatic or alicyclic polycarbodiimide compounds produced by various methods. Among these, an aliphatic or alicyclic polycarbodiimide compound is preferable, and an alicyclic polycarbodiimide compound is more preferably used from the viewpoint of melt kneadability at the time of extrusion or the like.
- These carbodiimide compounds can be produced by decarboxylation condensation reaction of organic polyisocyanate.
- a method of synthesizing various organic polyisocyanates by decarboxylation condensation reaction at a temperature of about 70 ° C. or higher in an inert solvent or without using a solvent in the presence of a carbodiimidization catalyst can be exemplified.
- the isocyanate group content is preferably 0.1 to 5% by mass, more preferably 1 to 3% by mass.
- organic polyisocyanate that is a raw material for synthesizing the carbodiimide compound
- various organic diisocyanates such as aromatic diisocyanate, aliphatic diisocyanate, and alicyclic diisocyanate, and mixtures thereof can be used.
- organic diisocyanate examples include 1,5-naphthalene diisocyanate, 4,4′-diphenylmethane diisocyanate, 4,4′-diphenyldimethylmethane diisocyanate, 1,3-phenylene diisocyanate, 1,4-phenylene diisocyanate, , 4-tolylene diisocyanate, 2,6-tolylene diisocyanate, hexamethylene diisocyanate, cyclohexane-1,4-diisocyanate, xylylene diisocyanate, isophorone diisocyanate, dicyclohexylmethane-4,4-diisocyanate, methylcyclohexane diisocyanate, tetramethylxylylene Range isocyanate, 2,6-diisopropylphenyl isocyanate, 1,3,5-triisopropylbenzene-2,4-dii Cyanate, methylenebis
- an end-capping agent such as monoisocyanate in order to seal the end of the carbodiimide compound and control the degree of polymerization.
- monoisocyanate examples include phenyl isocyanate, tolyl isocyanate, dimethylphenyl isocyanate, cyclohexyl isocyanate, butyl isocyanate, and naphthyl isocyanate, and two or more kinds may be used in combination.
- terminal blocker it is not limited to said monoisocyanate, What is necessary is just an active hydrogen compound which can react with isocyanate.
- active hydrogen compounds include aliphatic, aromatic, and alicyclic compounds such as methanol, ethanol, phenol, cyclohexanol, N-methylethanolamine, polyethylene glycol monomethyl ether, and polypropylene glycol monomethyl ether.
- carbodiimidization catalyst examples include 1-phenyl-2-phospholene-1-oxide, 3-methyl-1-phenyl-2-phospholene-1-oxide, 1-ethyl-2-phospholene-1-oxide, 3- Metal catalysts such as phospholene oxides such as methyl-2-phospholene-1-oxide and their 3-phospholene isomers, tetrabutyl titanate and the like can be used, and among these, from the viewpoint of reactivity, 3 -Methyl-1-phenyl-2-phospholene-1-oxide is preferred. Two or more carbodiimidization catalysts may be used in combination.
- the content of the carbodiimide compound is preferably 0.1 to 2 parts by weight, more preferably 0.2 to 1.5 parts by weight, and still more preferably 0.3 to 1 part by weight with respect to 100 parts by weight of the polyamide resin. .5 parts by mass. If the amount is less than 0.1 parts by mass, hydrolysis resistance is not sufficient, uneven discharge during melt kneading such as extrusion tends to occur, and melt kneading tends to be insufficient. On the other hand, when the amount exceeds 2 parts by mass, the viscosity during melt-kneading is remarkably increased, and the melt-kneading property and the moldability are liable to deteriorate.
- the polyamide resin composition of the present invention preferably contains a filler in addition to the elastomer.
- the filler is not particularly limited as long as it is generally used, and powdery, fibrous, granular and plate-like inorganic fillers can be preferably used, and resin-based fillers and natural-type fillers can also be preferably used.
- the powdery and granular fillers preferably have a particle size of 100 ⁇ m or less, more preferably 80 ⁇ m or less, carbonates such as kaolinite, silica, calcium carbonate, magnesium carbonate, calcium sulfate, magnesium sulfate.
- sulfates such as alumina, glass beads, carbon black, sulfides and metal oxides
- fibrous filler glass fibers, potassium titanate or calcium sulfate whiskers, wollastonite, carbon fibers, mineral fibers, alumina fibers, and the like can be used.
- the plate-like filler include glass flake, mica, talc, clay, graphite, sericite and the like. Among these, at least one selected from glass fiber, talc, mica, and wollastonite is preferable, and glass fiber is particularly preferable.
- Examples of the resin-based filler include aromatic liquid crystalline polyester resins, wholly aromatic polyamide resins, acrylic fibers, poly (benzimidazole) fibers, and the like.
- Examples of natural fillers include kenaf, pulp, hemp pulp, and wood pulp.
- the preferable content of the filler is 15 to 200 parts by mass, more preferably 30 to 180 parts by mass, and still more preferably 50 to 150 parts by mass with respect to 100 parts by mass of the polyamide resin. If the content is less than 15 parts by mass, the mechanical strength of the molded product tends to be insufficient, and if it exceeds 200 parts by mass, the fluidity of the polyamide resin is deteriorated and melt kneading, molding and the like are likely to be difficult.
- [4.4 Mold Release Agent] You may mix
- the release agent include aliphatic carboxylic acids, esters of aliphatic carboxylic acids and alcohols, aliphatic hydrocarbon compounds having a number average molecular weight of 200 to 15,000, and polysiloxane silicone oils.
- the aliphatic carboxylic acid examples include saturated or unsaturated aliphatic monovalent, divalent, or trivalent carboxylic acids.
- the aliphatic carboxylic acid includes alicyclic carboxylic acid.
- preferred aliphatic carboxylic acids are monovalent or divalent carboxylic acids having 6 to 36 carbon atoms, and aliphatic saturated monovalent carboxylic acids having 6 to 36 carbon atoms are more preferred.
- aliphatic carboxylic acids include palmitic acid, stearic acid, caproic acid, capric acid, lauric acid, arachidic acid, behenic acid, lignoceric acid, serotic acid, mellicic acid, tetrariacontanoic acid, montanic acid, adipine Examples include acids and azelaic acid.
- the aliphatic carboxylic acid in the ester of an aliphatic carboxylic acid and an alcohol for example, the same one as the aliphatic carboxylic acid can be used.
- the alcohol include saturated or unsaturated monohydric or polyhydric alcohols. These alcohols may have a substituent such as a fluorine atom or an aryl group. Among these, a monovalent or polyvalent saturated alcohol having 30 or less carbon atoms is preferable, and an aliphatic or alicyclic saturated monohydric alcohol or aliphatic saturated polyhydric alcohol having 30 or less carbon atoms is more preferable.
- alcohols include octanol, decanol, dodecanol, stearyl alcohol, behenyl alcohol, ethylene glycol, diethylene glycol, glycerin, pentaerythritol, 2,2-dihydroxyperfluoropropanol, neopentylene glycol, ditrimethylolpropane, dipentaerythritol and the like. Is mentioned.
- esters of aliphatic carboxylic acids and alcohols include beeswax (a mixture based on myricyl palmitate), stearyl stearate, behenyl behenate, stearyl behenate, glycerin monopalmitate, glycerin monostearate
- esters of aliphatic carboxylic acids and alcohols include beeswax (a mixture based on myricyl palmitate), stearyl stearate, behenyl behenate, stearyl behenate, glycerin monopalmitate, glycerin monostearate
- examples thereof include rate, glycerol distearate, glycerol tristearate, pentaerythritol monopalmitate, pentaerythritol monostearate, pentaerythritol distearate, pentaerythritol tristearate, pentaerythritol tetrastea
- Examples of the aliphatic hydrocarbon having a number average molecular weight of 200 to 15,000 include liquid paraffin, paraffin wax, microwax, polyethylene wax, Fischer-Tropsch wax, and ⁇ -olefin oligomer having 3 to 12 carbon atoms.
- the aliphatic hydrocarbon includes alicyclic hydrocarbons.
- the number average molecular weight of the aliphatic hydrocarbon is preferably 5,000 or less.
- paraffin wax, polyethylene wax, or a partial oxide of polyethylene wax is preferable, and paraffin wax and polyethylene wax are more preferable.
- the compounding amount of the release agent is preferably 0.001 to 2 parts by mass, more preferably 0.01 to 1 part by mass with respect to 100 parts by mass of the polyamide resin.
- a crystal nucleating agent can be used according to the required molding processability.
- the crystal nucleating agent include talc and boron nitride which are generally used, but an organic nucleating agent may also be used.
- the content of the nucleating agent is 0.001 to 6 parts by mass, preferably 0.02 to 2 parts by mass, more preferably 0.05 to 1 in the case of the organic nucleating agent or boron nitride with respect to 100 parts by mass of the polyamide resin. Part by mass. If the amount is too small, the expected nucleating agent effect may not be obtained, and the releasability may decrease. If the amount is too large, impact resistance and surface appearance tend to decrease.
- the amount is 0.1 to 8 parts by mass, preferably 0.3 to 2 parts by mass.
- the amount is 0.3 to 8 parts by mass, preferably 0.5 to 4 parts by mass. If the amount is too small, the nucleating agent effect cannot be obtained, and if the amount is too large, a foreign matter effect is obtained and the mechanical strength and impact resistance value tend to decrease. From the viewpoint of mechanical properties such as impact resistance, tensile elongation and bending deflection, it is preferable to contain talc or boron nitride.
- talc those having a number average particle diameter of 2 ⁇ m or less are preferable.
- Boron nitride has a number average particle size of usually 10 ⁇ m or less, preferably 0.005 to 5 ⁇ m, more preferably 0.01 to 3 ⁇ m.
- the number average particle diameter of talc is usually a value obtained by measurement using a laser diffraction / scattering particle size distribution meter.
- a molded product obtained using the polyamide resin composition of the present invention a film, a sheet, a laminated film, a laminated sheet, a tube, a hose, a pipe, a deformed extruded product, a hollow container, a bottle, a fiber, various shaped parts, etc.
- Various molded products can be listed.
- Molded articles formed using the polyamide resin composition of the present invention, an elastomer, and a polyamide resin composition comprising other components blended as necessary are excellent in impact resistance and flexibility, heat resistance, strength, various Excellent mechanical properties, such as injection molded products, films, sheets, tubes, hoses, threads, fibers, etc., various films, sheets, laminated films, laminated sheets, tubes, hoses, pipes, hollow containers, bottles, etc. It can be suitably used for containers, household goods, industrial materials, industrial materials, parts for electrical and electronic equipment, transport equipment parts such as automobiles, general machine parts, and precision machine parts.
- paraxylylenediamine 6039.2 g (44.34 mol) was added dropwise over 170 minutes with stirring. During this time, the internal temperature was continuously raised to 281 ° C.
- the pressure was controlled to 0.5 MPa, and the generated water was removed from the system through a partial condenser and a cooler. The temperature of the condenser was controlled in the range of 145 to 147 ° C.
- the pressure was reduced at a rate of 0.4 MPa / hour, and the pressure was reduced to normal pressure in 60 minutes. During this time, the internal temperature rose to 299 ° C.
- Example 2 Synthesis of polyamide resin-2 (MPXD10)
- the mixing ratio of metaxylylenediamine and paraxylylenediamine was the ratio described in the table, and the amount of the mixed diamine dropped was 6066.3 g (44.54 mol).
- polyamide resin-2 was obtained.
- Example 4 (Synthesis of polyamide resin-4 (MPXD10)) A polyamide resin-4 was obtained in the same manner as in Example 3, except that the amount of the mixed diamine added was 8,261.9 g (60.66 mol).
- the mixing ratio of metaxylylenediamine and paraxylylenediamine is the molar ratio described in the table, the dropping amount of the mixed diamine is 8257.8 g (60.63 mol), and the mixed metaxylylenediamine is stirred for 100 minutes. In short, it was dripped. During this time, the internal temperature was continuously raised to 235 ° C. In the dropping step, the pressure was controlled to 0.5 MPa, and the generated water was removed from the system through a partial condenser and a cooler. The temperature of the condenser was controlled in the range of 145 to 147 ° C.
- Example 7 (Synthesis of polyamide resin-7 (MXD10)) Into a reaction vessel equipped with a stirrer, a partial condenser, a total condenser, a thermometer, a dropping funnel and a nitrogen introduction tube, and a strand die, 12,135 g (60 mol) of sebacic acid (SA1) was placed, and sodium hypophosphite Hydrate (NaH 2 PO 2 ⁇ H 2 O) 4.6574 g (75 ppm as the phosphorus atom concentration in the polyamide resin) and sodium acetate 2.4151 g were added, and after sufficient nitrogen substitution, under a small amount of nitrogen stream The system was heated to 170 ° C. with stirring.
- SA1 sebacic acid
- Example 4 Synthesis of polyamide resin-11 (PXD10)
- the synthesis was performed in the same manner as in Example 1 except that the dripping amount of paraxylylenediamine was changed to 5951.2 g.
- Examples 8 and 9 and Comparative Example 5-Production of polyamide resin / elastomer composition ⁇ Ingredients> The following elastomers (EL1) to (EL2) were used as the elastomer.
- EL1 Maleic acid-modified ethylene-propylene copolymer, trade name “Toughmer MP0610” manufactured by Mitsui Chemicals, Inc.
- EL2 Maleic acid-modified styrene / butadiene / butylene / styrene hydrogenated block copolymer, manufactured by Asahi Kasei Co., Ltd., trade name “Tuftec M1913”
- Glass fibers were used as fillers, and the following were used as mold release agents.
- Glass fiber Nippon Electric Glass Chopped Strand, trade name "T-275H”
- Release agent Calcium montanate Made by Clariant Japan, trade name “Recommont CAV102”
- the obtained pellets were dried with dehumidified air at 80 ° C. (dew point ⁇ 40 ° C.) for 8 hours, and then with an injection molding machine (manufactured by FANUC, model: 100T) at a resin temperature polyamide melting point + 30 ° C.
- a test piece (ISO test piece 4 mm thick) was prepared.
- the reactive polyamide resin of the present invention has excellent elastic modulus and flexibility, and the resin composition containing an elastomer has excellent impact resistance. I understood it.
- the polyamide resin of the present invention has excellent reactivity with an elastomer, and a molded product formed using a resin composition comprising an elastomer has excellent impact resistance, flexibility, and adhesion to a metal, as well as heat resistance and strength. Because of its excellent mechanical properties, injection molded products, films, sheets, tubes, hoses, threads, fibers, etc., various films, sheets, laminated films, laminated sheets, tubes, hoses, pipes, hollow containers, bottles, etc. Can be used suitably for various containers, household goods, industrial materials, industrial materials, parts for electrical and electronic equipment, transportation equipment parts such as automobiles, general machine parts, precision machine parts, etc. There is something expensive.
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Abstract
Description
また、エラストマー等との反応性に優れた反応性ポリアミド樹脂およびこれとエラストマーとからなるポリアミド樹脂組成物に関する。
このため、エラストマーを配合するだけで、高度の耐衝撃性と高い柔軟性を達成することが可能なXD10系のポリアミド樹脂の開発が強く望まれていた。
また、ポリアミド樹脂は、YIが低いことが要求されている。特に、加熱後のYIの増加を抑制することが求められる。
具体的には、以下の手段により、上記課題は解決された。
<1>ジアミン構成単位の70モル%以上がキシリレンジアミンに由来するジアミン(A)とジカルボン酸構成単位の50モル%以上がセバシン酸に由来するジカルボン酸(B)を重縮合したポリアミド樹脂であって、反応性官能基濃度が100μeq/g以上で、反応したジカルボン酸に対する反応したジアミンのモル比(反応したジアミンのモル数/反応したジカルボン酸のモル数)が1.0以上であることを特徴とする反応性ポリアミド樹脂。
<2>反応性官能基が、ポリアミド樹脂の末端に存在することを特徴とする<1>に記載の反応性ポリアミド樹脂。
<3>反応性官能基が、カルボキシル基及び/又はアミノ基であることを特徴とする<1>又は<2>に記載の反応性ポリアミド樹脂。
<4>アミノ基濃度が50μeq/g以上であることを特徴とする<3>に記載の反応性ポリアミド樹脂。
<5>数平均分子量が、20,000以下であることを特徴とする<1>~<4>のいずれかに記載の反応性ポリアミド樹脂。
<6>キシリレンジアミンが、メタキシリレンジアミン又はパラキシリレンジアミンであることを特徴とする<1>~<5>のいずれかに記載の反応性ポリアミド樹脂。
<7>キシリレンジアミンが、メタキシリレンジアミンとパラキシリレンジアミンの混合物であることを特徴とする<1>~<5>のいずれかに記載の反応性ポリアミド樹脂。
<8>前記反応モル比が1.015以下である、<1>~<7>のいずれかに記載の反応性ポリアミド樹脂。
<9>反応性官能基がポリアミド樹脂の末端に存在し、かつ、カルボキシル基およびアミノ基であり、末端アミノ基濃度が50μeq/g以上である、<1>~<8>のいずれかに記載の反応性ポリアミド樹脂。
<10><1>~<9>のいずれかに記載の反応性ポリアミド樹脂100質量部に、エラストマーを0.5~100質量部配合してなることを特徴とするポリアミド樹脂組成物。
<11>エラストマーは、ポリオレフィン系エラストマー、ジエン系エラストマー、ポリスチレン系エラストマー、ポリアミド系エラストマー、ポリエステル系エラストマー、ポリウレタン系エラストマー並びにシリコン系エラストマーから選ばれるエラストマーまたはそれに官能基を導入したエラストマーであることを特徴とする<10>に記載のポリアミド樹脂組成物。
そして、本発明のポリアミド樹脂とエラストマーからなる樹脂組成物を用いて成形した成形品は、耐衝撃性や柔軟性に優れ、また耐熱性、強度、各種機械的物性に優れるため、射出成形品、フィルム、シート、チューブ、ホース、糸、繊維などとして、各種のフィルム、シート、積層フィルム、積層シート、チューブ、ホース、パイプ、中空容器、ボトル等の各種容器、各種部品・部材、産業資材、工業材料、家庭用品に好適に使用することができる。本発明のポリアミド樹脂を金属に射出成型またはラミネート加工、あるいは金属板に共押出した部品や金属管に被覆したもの等に使用することができる。
本発明のポリアミド樹脂は、ジアミン構成単位の70モル%以上がキシリレンジアミンに由来するジアミン(A)とジカルボン酸構成単位の50モル%以上がセバシン酸に由来するジカルボン酸(B)を重縮合したポリアミド樹脂であって、反応性官能基濃度が100μeq/g以上で、反応したジカルボン酸に対する反応したジアミンのモル比(反応したジアミンのモル数/反応したジカルボン酸のモル数)反応モル比が1.0以上であることを特徴とする反応性ポリアミド樹脂である。
以下、本発明の内容について詳細に説明する。
本発明のポリアミド樹脂は、ジアミン構成単位(ジアミンに由来する構成単位)の70モル%以上がキシリレンジアミンに由来するジアミン(A)とジカルボン酸構成単位(ジカルボン酸に由来する構成単位)の50モル%以上がセバシン酸に由来するジカルボン酸(B)を重縮合した反応性ポリアミド樹脂である。
1,3-ビス(アミノメチル)シクロヘキサン、1,4-ビス(アミノメチル)シクロヘキサン、1,3-ジアミノシクロヘキサン、1,4-ジアミノシクロヘキサン、ビス(4-アミノシクロヘキシル)メタン、2,2-ビス(4-アミノシクロヘキシル)プロパン、ビス(アミノメチル)デカリン、ビス(アミノメチル)トリシクロデカン等の脂環族ジアミン;
ビス(4-アミノフェニル)エーテル、パラフェニレンジアミン、ビス(アミノメチル)ナフタレン等の芳香環を有するジアミン類等を例示することができるが、これらに限定されるものではない。
また、セバシン酸が含有するオクタン酸、ノナン酸、ウンデカン酸等のモノカルボン酸は、0~1質量%が好ましく、0~0.5質量%がより好ましく、0~0.4質量%がさらに好ましい。この範囲であると、得られるポリアミド樹脂の品質が良く、重合に影響を及ぼさないため好ましい。
セバシン酸以外のジカルボン酸成分を使用する場合は、これらの中でも、アジピン酸、ウンデカン二酸、ドデカン二酸等を用いることが好ましく、特にはアジピン酸が好ましい。アジピン酸を併用することで、弾性率や吸水率、結晶性をコントロールしやすくなる。アジピン酸の量は、40モル%以下がより好ましく、30モル%以下がさらに好ましい。
また、ウンデカン二酸、ドデカン二酸を併用すると、ポリアミド樹脂の比重が小さくなり、成形品が軽量化されるため好ましい。
セバシン酸以外の炭素数4~20のα,ω-直鎖脂肪族ジカルボン酸を使用する場合の使用割合は、50モル%未満であり、好ましくは40モル%以下である。
さらに、ジアミン成分、ジカルボン酸成分以外にも、ポリアミド樹脂を構成する成分として、本発明の効果を損なわない範囲で、ε-カプロラクタムやラウロラクタム等のラクタム類、アミノカプロン酸、アミノウンデカン酸等の脂肪族アミノカルボン酸類も共重合成分として使用することもできる。
反応性官能基濃度とは、ポリアミド樹脂の末端ならびに主鎖又は側鎖上に存在する反応性の基の濃度(μeq/g)をいい、反応性の基とは、代表的には、アミノ基およびカルボキシル基である。原料モノマーの構成を鑑み、理論的にポリマー末端にのみ反応性官能基が存在する場合は、末端の反応性官能基濃度がポリマー全体の反応性官能基濃度と実質的に等しくなる場合があり、本発明ではこのような態様が好ましい。反応性官能基濃度が100μeq/g以上の高い濃度で存在することにより、エラストマー、特にエラストマーの有するカルボキシル基や酸無水物基などの官能基との反応性が良くなることから分散性が良好となり、耐衝撃性と柔軟性の向上効果が格段に発現することとなる。また、金属界面との接着性も向上する。従って、本発明のポリアミド樹脂は、ポリアミド樹脂成形品と金属を複合化する用途に用いる場合にも好ましく採用できる。金属とポリアミドの接着性を向上させるには、溶融ポリアミドを金属界面に接触させるのに先立って、金属表面をコロナ処理等の公知の技術によって反応性を高めることや、表面に微小な凹凸を作成することなどが好ましい。
反応性官能基濃度は、好ましくは130μeq/g以上であり、より好ましくは140μeq/g以上であり、さらには150μeq/g以上であり、特には160μeq/g以上である。その上限は、好ましくは250μeq/g以下であり、より好ましくは230μeq/g以下であり、さらには210μeq/g以下、特には200μeq/g以下である。本発明では、特に、ポリアミド樹脂中における末端アミノ基および末端カルボキシル基の合計濃度が上記反応性官能基濃度の範囲内となることが好ましい。
反応モル比(r)は、好ましくは1.001以上、より好ましくは1.003以上、特には1.005以上であり、その上限は、通常、1.03以下、より好ましくは1.02以下、特に好ましくは1.015以下である。この範囲であるとポリアミド樹脂の重合時に反応性が良好であり、重合時の劣化が起こりにくく品質の優れた樹脂を得ることができる。
r=(1-cN-b(C-N))/(1-cC+a(C-N))
式中、
a:M1/2
b:M2/2
c:18.015 (水の分子量(g/mol))
M1:ジアミンの分子量(g/mol)
M2:ジカルボン酸の分子量(g/mol)
N:アミノ基濃度(eq/g)
C:カルボキシル基濃度(eq/g)
本発明では上述の反応モル比とし、さらに、アミノ基濃度(好ましくは、末端アミノ基濃度)を50μeq/g以上とすることにより、本発明のポリアミド樹脂を加熱しても、YI増加をより効果的に少なくすることができる。これまで、ポリアミド樹脂中のアミノ基が過剰であると溶融滞留時にゲル化およびYIの増加が進行しやすく耐熱性に劣ると考えらえていた。しかしながら、驚くべきことに本発明のポリアミド樹脂はアミノ基が過剰であると、加熱時のYIの増加が抑えられるということを見出した。この原因については検証が十分ではないが、ジカルボン酸構成単位の50モル%以上がセバシン酸に由来することや、何らかの末端基の相互作用により、着色物質の発生を抑制しているか、発生した着色物質と末端基が反応して黄色く発色するのを防止しているものと想像される。
ポリアミド樹脂を、例えばLEDリフレクタ用途などの加熱環境下で使用される用途では、耐熱老化性の向上および加熱時のYI増加を抑制することが求められているが、本発明のポリアミド樹脂はこのような目的にも好ましく適用できる。また、金属界面との接着性の観点からも、上述の範囲が好ましい。
ポリアミド樹脂の製造方法がいわゆる塩法である場合は、反応モル比を1.0以上にするには、具体的には、例えば、原料ジアミン/原料ジカルボン酸の成分比をこの範囲に設定し、反応を十分進めればよい。また溶融ジカルボン酸に連続的にジアミンを滴下する方法の場合は、仕込み比をこの範囲とすることの他に、ジアミンを目標値よりも過剰に滴下し、ジアミンを滴下する最中に還流させるジアミン量をコントロールし、滴下したジアミンを反応系外に除去することでも可能である。具体的には還流塔の温度を最適な範囲にコントロールすることや充填塔の充填物、所謂、ラシヒリングやレッシングリング、サドル等を適切な形状、充填量に制御することで、目標値よりも過剰なジアミンを系外に除去すればよい。また、ジアミン滴下後の反応時間を短くすることでも目標値よりも過剰な未反応のジアミンを系外に除去することができる。さらにはジアミンの滴下速度を制御することによっても目標値よりも過剰な未反応のジアミンを必要に応じて反応系外に除去することができる。これらの方法により仕込み比が所望範囲から外れても反応モル比を所定の範囲にコントロールすることが可能である。
したがって、本発明のポリアミド樹脂は、その工業的製造においては、リンが不可避的に存在することになるが、その量は、リン原子濃度として1~500ppmであることが好ましい。より好ましくは5~300ppm、さらに好ましくは10~200ppmである。リン原子濃度が1ppm未満であると、ポリアミド樹脂が黄変しやすい傾向にあり、500ppmを超えると、ポリアミド樹脂合成時の過剰なアミド化反応により重合の制御が難しくなる場合がある。
亜リン酸化合物の具体例としては、亜リン酸、ピロ亜リン酸;亜リン酸水素ナトリウム、亜リン酸ナトリウム等の亜リン酸金属塩;亜リン酸トリエチル、亜リン酸トリフェニル、エチルホスホン酸、フェニルホスホン酸、フェニルホスホン酸ジエチル等の亜リン酸化合物;エチルホスホン酸ナトリウム、エチルホスホン酸カリウム、フェニルホスホン酸ナトリウム、フェニルホスホン酸カリウム、フェニルホスホン酸リチウム等のフェニルホスホン酸金属塩等が挙げられる。
これらの中でも、好ましい酸化防止剤は、ポリアミド樹脂の重合反応を促進する効果の観点及び着色防止効果の観点から、次亜リン酸ナトリウム、次亜リン酸カリウム、次亜リン酸リチウム等の次亜リン酸金属塩が好ましく、次亜リン酸ナトリウムが特に好ましい。
数平均分子量(Mn)が6,000~20,000の範囲を外れると、エラストマーとの反応性が悪くなりやすい。より好ましい数平均分子量(Mn)は8,000~17,000であり、さらには9,000~15,000であり、特には10,000~14,000であり、なかでも11,000~13,000である。このような範囲であると、反応性が良好で分散性が良好となり、また、成形加工性が良好である。
数平均分子量(Mn)=2,000,000/([COOH]+[NH2])
ポリアミド樹脂の分子量分布は、例えば、重合時に使用する開始剤や触媒の種類、量及び反応温度、圧力、時間等の重合反応条件などを適宜選択することにより調整できる。また、異なる重合条件によって得られた平均分子量の異なる複数種のXD10ポリアミド樹脂を混合したり、重合後のポリアミド樹脂を分別沈殿させることにより調整することもできる。
溶融粘度のより好ましい範囲は、60~700Pa・s、さらに好ましくは70~500Pa・sである。
ポリアミド樹脂の溶融粘度は、例えば、原料ジカルボン酸成分およびジアミン成分の仕込み比、重合触媒、分子量調節剤、重合温度、重合時間を適宜選択することにより調整できる。
また、ポリアミド樹脂のガラス転移点は、50~100℃が好ましく、55~100℃がより好ましく、特に好ましくは60~100℃である。この範囲であると、耐熱性が良好となる傾向にある。
また、ガラス転移点とは、試料を一度加熱溶融させ熱履歴による結晶性への影響をなくした後、再度昇温して測定されるガラス転移点をいう。測定には、例えば、島津製作所社(SHIMADZU CORPORATION)製「DSC-60」を用い、試料量は約5mgとし、雰囲気ガスとしては窒素を30ml/分で流し、昇温速度は10℃/分の条件で室温から予想される融点以上の温度まで加熱し溶融させた際に観測される吸熱ピークのピークトップの温度から融点を求めることができる。次いで、溶融したポリアミド樹脂を、ドライアイスで急冷し、10℃/分の速度で融点以上の温度まで再度昇温し、ガラス転移点を求めることができる。
本発明の反応性ポリアミド樹脂は、エラストマーとの反応性に優れ、エラストマーによる耐衝撃性や柔軟性の改良効果を極めて高くすることができる。従って、本発明の反応性ポリアミド樹脂は、エラストマーを含むポリアミド樹脂組成物として好ましく用いることができる。
エラストマーは、衝撃強度を改良するものであり、その種類に制限はなく、ゴム質重合体(熱可塑性エラストマーを含む)であればいかなるものでも使用でき、例えば、ポリオレフィン系エラストマー、ジエン系エラストマー、ポリスチレン系エラストマー、ポリアミド系エラストマー、ポリエステル系エラストマー、ポリウレタン系エラストマー、シリコン系エラストマー等公知のエラストマーが使用できる。
α、β-不飽和カルボン酸およびその誘導体の具体例としては、マレイン酸、無水マレイン酸、フマル酸、イタコン酸、アクリル酸、グリシジルアクリレート、2-ヒドロキシエチルアクリレート、メタクリル酸、グリシジルメタクリレート、2-ヒドロキシエチルメタクリレート、クロトン酸、シス-4-シクロヘキセン-1,2-ジカルボン酸およびその無水物、エンド-シス-ビシクロ{2.2.1}-5-ヘプテン-2,3-ジカルボン酸およびその無水物、マレイミド化合物等が挙げられる。
ラジカル開始剤の使用量は、官能基を導入するエラストマー100質量部に対して通常0.01~10質量部、好ましくは0.05~5質量部である。なお、官能基を導入する反応は公知の方法に従って実施することができ、例えば、溶融混練、溶液混合等の方法で実施することができる。
反応性ポリアミド樹脂にエラストマーを配合してなるポリアミド樹脂組成物においては、樹脂組成物を成形し成形品としたときに、反応性ポリアミド樹脂及びエラストマーの一部が反応していてもよい。なお、ここで反応とは、イオン結合、水素結合、脱水反応、縮合反応等を意味し、反応性ポリアミド樹脂及びエラストマーが反応することによって分散性が良好となり好ましい。
本発明のポリアミド樹脂組成物には、本発明の効果を損なわない範囲で、酸化防止剤、熱安定剤等の安定剤、耐加水分解性改良剤、耐候安定剤、充填材、艶消剤、紫外線吸収剤、核剤、可塑剤、分散剤、難燃剤、帯電防止剤、着色防止剤、ゲル化防止剤、着色剤、離型剤等の添加剤等を加えることができる。
本発明のポリアミド樹脂組成物には、安定剤(酸化防止剤、熱安定剤)を配合することが好ましい。安定剤としては、例えば、リン系、ヒンダードフェノール系、ヒンダードアミン系、シュウ酸アニリド系、有機硫黄系、芳香族第2級アミン系などの有機系安定剤、アミン系酸化防止剤、銅化合物やハロゲン化物などの無機系安定剤が好ましい。リン系安定剤としては、ホスファイト化合物およびホスホナイト化合物が好ましい。
有機硫黄系化合物の分子量は、通常200以上、好ましくは500以上であり、その上限は通常3,000である。
銅化合物は、種々の無機酸または有機酸の銅塩であって、後述のハロゲン化物を除くものである。銅としては、第1銅、第2銅の何れでもよく、銅塩の具体例としては、塩化銅、臭化銅、ヨウ化銅、リン酸銅、ステアリン酸銅の他、ハイドロタルサイト、スチヒタイト、パイロライト等の天然鉱物が挙げられる。
本発明のポリアミド樹脂組成物には、耐加水分解性改良剤としてのカルボジイミド化合物を配合することが好ましい。カルボジイミド化合物としては、種々の方法で製造した芳香族、脂肪族又は脂環式のポリカルボジイミド化合物が好ましく挙げられる。これらの中で、押出し時等における溶融混練性の面から、脂肪族又は脂環式ポリカルボジイミド化合物が好ましく、脂環式ポリカルボジイミド化合物がより好ましく用いられる。
有機ジイソシアネートとしては、具体的には、1,5-ナフタレンジイソシアネート、4,4’-ジフェニルメタンジイソシアネート、4,4’-ジフェニルジメチルメタンジイソシアネート、1,3-フェニレンジイソシアネート、1,4-フェニレンジイソシアネート、2,4-トリレンジイソシアネート、2,6-トリレンジイソシアネート、ヘキサメチレンジイソシアネート、シクロヘキサン-1,4-ジイソシアネート、キシリレンジイソシアネート、イソホロンジイソシアネート、ジシクロヘキシルメタン-4,4-ジイソシアネート、メチルシクロヘキサンジイソシアネート、テトラメチルキシリレンジイソシアネート、2,6-ジイソプロピルフェニルイソシアネート、1,3,5-トリイソプロピルベンゼン-2,4-ジイソシアネート、メチレンビス(4,1-シクロへキシレン)=ジイソシアネート等を例示することができ、2種以上を併用してもよい。これらの中でも、ジシクロヘキシルメタン-4,4-ジイソシアネート、メチレンビス(4,1-シクロへキシレン)=ジイソシアネートが好ましい。
本発明のポリアミド樹脂組成物には、エラストマーとともに、充填材を含有することも好ましい。充填材としては、一般に用いられるものであれば特に制限は無く、粉末状、繊維状、粒状および板状の無機充填材が、また、樹脂系の充填材あるいは天然系の充填材も好ましく使用出来る。
粉末状、粒状の充填材としては、好ましくは100μm以下、更に好ましくは80μm以下の粒径を有したものであり、カオリナイト、シリカ、炭酸カルシウム、炭酸マグネシウム等の炭酸塩、硫酸カルシウム、硫酸マグネシウム等の硫酸塩、アルミナ、ガラスビーズ、カーボンブラック、硫化物及び金属酸化物等が使用出来る。繊維状充填材としては、ガラス繊維、チタン酸カリウムや硫酸カルシウムのウィスカー、ワラストナイト、カーボン繊維、鉱物繊維、及びアルミナ繊維等が使用出来る。板状充填材としては、ガラスフレーク、マイカ、タルク、クレー、黒鉛、セリサイト等が挙げられる。これらの中でも、ガラス繊維、タルク、マイカ、ワラストナイトから選ばれる少なくとも1種が好ましく、ガラス繊維が特に好ましい。
樹脂系の充填材としては、芳香族液晶性ポリエステル樹脂、全芳香族ポリアミド樹脂、アクリル繊維、ポリ(ベンズイミダゾール)繊維等も挙げられる。
天然系の充填材としては、ケナフ、パルプ、麻パルプ、木材パルプ等が挙げられる。
本発明のポリアミド樹脂組成物には、離型剤を配合してもよい。
離型剤としては、例えば、脂肪族カルボン酸、脂肪族カルボン酸とアルコールとのエステル、数平均分子量200~15,000の脂肪族炭化水素化合物、ポリシロキサン系シリコーンオイルなどが挙げられる。
これらの中では、パラフィンワックス、ポリエチレンワックスまたはポリエチレンワックスの部分酸化物が好ましく、パラフィンワックス、ポリエチレンワックスがさらに好ましい。
本発明のポリアミド樹脂組成物を用いて得られる成形品としては、フィルム、シート、積層フィルム、積層シート、チューブ、ホース、パイプ、異形押出品、中空容器、ボトル、繊維、各種形状の部品等、種々の成形品をあげることが出来る。
なお、実施例および比較例に使用したポリアミド樹脂の各評価の方法は、以下のとおりである。
示差走査熱量測定(DSC)法により、島津製作所社(SHIMADZU CORPORATION)製DSC-60を用い、30℃から予想される融点以上の温度まで10℃/分の速度で昇温し、ポリアミド樹脂を溶融させた。この時の吸熱ピークのピークトップの温度から融点を求めた。溶融後サンプルをドライアイスで冷却し、次いで、10℃/分の速度で融点以上の温度まで昇温し、ガラス転移点を求めた。
(株)東洋精機(Toyoseiki Seisaku-sho,Ltd.)製のキャピログラフ(Capillograph)D-1を使用し、ダイ:1mmφ×10mm長さ、見かけのせん断速度122sec-1、測定温度を融点+30℃、ポリアミド樹脂の水分率0.06質量%以下の条件で測定した。なお、ポリアミド樹脂が融点を2つ以上有する場合は、高温側の吸熱ピークのピークトップの温度を融点とし、測定を行った。
下記の方法で得られたポリアミド樹脂0.2gを30mlのフェノール/エタノール(4:1)混合溶液に20~30℃で攪拌溶解し、0.01Nの塩酸で滴定して測定した。
下記の方法で得られたポリアミド樹脂0.1gを30mlのベンジルアルコールに200℃で溶解し、160℃~165℃の範囲でフェノールレッド溶液を0.1ml加えた。その溶液を0.132gのKOHをベンジルアルコール200mlに溶解させた滴定液(KOH濃度として0.01mol/l)で滴定して測定した。
上記した中和適定により求められたポリアミド樹脂の末端アミノ基濃度[NH2](μeq/g)と末端カルボキシル基濃度[COOH](μeq/g)の値から、次式で算出した。
数平均分子量=2×1,000,000/([COOH]+[NH2])
前記した次式により求めた。
r=(1-cN-b(C-N))/(1-cC+a(C-N))
式中、a:M1/2
b:M2/2
c:18.015
M1:ジアミンの分子量(g/mol)
M2:ジカルボン酸の分子量(g/mol)
N:アミノ基濃度(当量/g)
C:カルボキシル基濃度(当量/g)
下記実施例で得られたペレットをイナートオーブン中、窒素気流下で300℃、3時間保持し、加熱前後のYIを、JIS K7105に準拠し、日本電色工業(株)製のSE2000型分光式色彩計で、反射法により測定した。加熱前と加熱後のYIを測定した。さらにその差を示した(表1のYIの差)。
(ポリアミド樹脂-1(PXD10)の合成)
攪拌機、分縮器、冷却器、温度計、滴下装置及び窒素導入管、ストランドダイを備えた内容積50リットルの反応容器に、精秤したセバシン酸8950g(44.25mol)、次亜リン酸カルシウム12.54g(0.074mol)、酢酸ナトリウム6.45g(0.079mol)を秤量して仕込んだ。反応容器内を十分に窒素置換した後、窒素で0.3MPaに加圧し、攪拌しながら160℃に昇温してセバシン酸を均一に溶融した。次いでパラキシリレンジアミン6039.2g(44.34mol)を攪拌下で170分を要して滴下した。この間、内温は281℃まで連続的に上昇させた。滴下工程では圧力を0.5MPaに制御し、生成水は分縮器及び冷却器を通して系外に除いた。分縮器の温度は145~147℃の範囲に制御した。パラキシリレンジアミン滴下終了後、0.4MPa/時間の速度で降圧し、60分間で常圧まで降圧した。この間に内温は299℃まで昇温した。その後0.002MPa/分の速度で降圧し、20分間で0.08MPaまで降圧した。その後攪拌装置のトルクが所定の値となるまで0.08MPaで反応を継続した。0.08MPaでの反応時間は10分であった。その後、系内を窒素で加圧し、ストランドダイからポリマーを取り出してこれをペレット化し、約13kgのポリアミド樹脂-1を得た。
(ポリアミド樹脂-2(MPXD10)の合成)
実施例1において、メタキシリレンジアミンとパラキシリレンジアミンの混合割合を表に記載した割合とし、混合ジアミンの滴下量を6066.3g(44.54mol)とした以外は、実施例1と同様にしてポリアミド樹脂-2を得た。
(ポリアミド樹脂-3(MPXD10)の合成)
撹拌機、分縮器、全縮器、温度計、滴下ロート及び窒素導入管、ストランドダイを備えた反応容器に、精秤したセバシン酸12,135g(60mol)、次亜リン酸ナトリウム一水和物(NaH2PO2・H2O)3.105g(ポリアミド樹脂中のリン原子濃度として50ppm)、酢酸ナトリウム1.61gを入れ、十分に窒素置換した後、さらに少量の窒素気流下で系内を撹拌しながら170℃まで加熱した。
これにメタキシリレンジアミンとパラキシリレンジアミンの5:5の混合ジアミン8,258.6g(60.64mol)を撹拌下に滴下し、生成する縮合水を系外へ除きながら系内を連続的に昇温した。混合メタキシリレンジアミンの滴下終了後、内温を260℃として20分間溶融重合反応を継続した。その後、系内を窒素で加圧し、ストランドダイからポリマーを取り出してこれをペレット化し、約13kgのポリアミド樹脂-3を得た。
(ポリアミド樹脂-4(MPXD10)の合成)
実施例3において、混合ジアミンの滴下量を8,261.9g(60.66mol)とした以外は実施例3と同様にしてポリアミド樹脂-4を得た。
(ポリアミド樹脂-5(MPXD10)の合成)
撹拌機、分縮器、全縮器、温度計、滴下ロート及び窒素導入管、ストランドダイを備えた反応容器に、精秤したセバシン酸12,135g(60mol)、次亜リン酸ナトリウム一水和物(NaH2PO2・H2O)3.105g(ポリアミド樹脂中のリン原子濃度として50ppm)、酢酸ナトリウム1.61gを入れ、十分に窒素置換した後、さらに少量の窒素気流下で系内を撹拌しながら170℃まで加熱した。メタキシリレンジアミンとパラキシリレンジアミンの混合割合を表に記載のモル比とし、混合ジアミンの滴下量を8257.8g(60.63mol)とし、混合メタキシリレンジアミンを、攪拌下で100分を要して滴下した。この間、内温は235℃まで連続的に上昇させた。滴下工程では圧力を0.5MPaに制御し、生成水は分縮器及び冷却器を通して系外に除いた。分縮器の温度は145~147℃の範囲に制御した。混合ジアミン滴下終了後、20分間攪拌を継続した後、0.4MPa/時間の速度で降圧し、30分間で常圧まで降圧した。この間に内温は236℃まで昇温した。その後0.002MPa/分の速度で降圧し、20分間で0.08MPaまで降圧した。その後攪拌装置のトルクが所定の値となるまで0.08MPaで反応を継続した。0.08MPaでの反応時間は15分であった。その後、系内を窒素で加圧し、ストランドダイからポリマーを取り出してこれをペレット化し、ポリアミド樹脂-5を得た。
(ポリアミド樹脂-6(MPXD10)の合成)
製造例5において、混合ジアミンの滴下量を8237.4g(60.48mol)とした以外は製造例5と同様にしてポリアミド樹脂-6を得た。
(ポリアミド樹脂-7(MXD10)の合成)
撹拌機、分縮器、全縮器、温度計、滴下ロート及び窒素導入管、ストランドダイを備えた反応容器に、セバシン酸(SA1)12,135g(60mol)を入れ、次亜リン酸ナトリウム一水和物(NaH2PO2・H2O)4.6574g(ポリアミド樹脂中のリン原子濃度として75ppm)、酢酸ナトリウム2.4151gを入れ、十分に窒素置換した後、さらに少量の窒素気流下で系内を撹拌しながら170℃まで加熱した。
これにメタキシリレンジアミン(MXDA)8236.6g(60.47mol)を撹拌下に滴下し、生成する縮合水を系外へ除きながら系内を連続的に昇温した。メタキシリレンジアミンの滴下終了後、内温を220℃として20分間溶融重合反応を継続した。
その後、系内を窒素で加圧し、ストランドダイからポリマーを取り出して、これをペレット化し、ポリアミド樹脂-7を得た。
上記したポリアミド樹脂1~7の評価結果を、表1に記載する。
(ポリアミド樹脂-8(MXD10)の合成)
撹拌機、分縮器、全縮器、温度計、滴下ロート及び窒素導入管、ストランドダイを備えた反応容器に、セバシン酸(SA1)12,135g(60mol)を入れ、十分に窒素置換した後、さらに少量の窒素気流下で系内を撹拌しながら170℃まで加熱した。
これにメタキシリレンジアミン(MXDA)8163.8g(59.94mol)を撹拌下に滴下し、生成する縮合水を系外へ除きながら系内を連続的に昇温した。メタキシリレンジアミンの滴下終了後、内温を260℃として40分間溶融重合反応を継続した。
その後、系内を窒素で加圧し、ストランドダイからポリマーを取り出して、これをペレット化し、ポリアミド樹脂-8を得た。このポリアミド樹脂の評価結果を表1に記載する
(ポリアミド樹脂-9(MXD10)の合成)
撹拌機、分縮器、全縮器、温度計、滴下ロート及び窒素導入管、ストランドダイを備えた反応容器に、セバシン酸(SA1)12,135g(60mol)を入れ、十分に窒素置換した後、さらに少量の窒素気流下で系内を撹拌しながら170℃まで加熱した。
これにメタキシリレンジアミン(MXDA)8147.5g(59.82mol)を撹拌下に滴下し、生成する縮合水を系外へ除きながら系内を連続的に昇温した。メタキシリレンジアミンの滴下終了後、内温を250℃として30分間溶融重合反応を継続した。
その後、系内を窒素で加圧し、ストランドダイからポリマーを取り出して、これをペレット化し、ポリアミド樹脂-9を得た。このポリアミド樹脂の評価結果を表1に記載する。
(ポリアミド樹脂-10(MXD10)の合成)
撹拌機、分縮器、全縮器、温度計、滴下ロート及び窒素導入管、ストランドダイを備えた反応容器に、セバシン酸(SA1)12,135g(60mol)を入れ、十分に窒素置換した後、さらに少量の窒素気流下で系内を撹拌しながら170℃まで加熱した。
これにメタキシリレンジアミン(MXDA)8065.8g(59.22mol)を撹拌下に滴下し、生成する縮合水を系外へ除きながら系内を連続的に昇温した。メタキシリレンジアミンの滴下終了後、内温を220℃として15分間溶融重合反応を継続した。
その後、系内を窒素で加圧し、ストランドダイからポリマーを取り出して、これをペレット化し、ポリアミド樹脂-10を得た。このポリアミド樹脂の評価結果を表1に記載する。
(ポリアミド樹脂-11(PXD10)の合成)
実施例1において、パラキシリレンジアミンの滴下量を5951.2gとした以外は実施例1と同様に合成を行った。
<使用成分>
エラストマーとして、以下のエラストマー(EL1)~(EL2)を使用した。
EL1:
マレイン酸変性エチレン-プロピレン共重合体
三井化学社製、商品名「タフマーMP0610」
EL2:
マレイン酸変性スチレン・ブタジェン/ブチレン・スチレン水添ブロック共重合体
旭化成社製、商品名「タフテックM1913」
ガラス繊維:
日本電気硝子社製チョップドストランド、商品名「T-275H」
離型剤:
モンタン酸カルシウム
クラリアント・ジャパン社製、商品名「リコモントCAV102」
前記したポリアミド樹脂および上記の各成分を、表-2に記載の割合(質量部)で秤量し、まずガラス繊維を除いた成分をタンブラーによって混合した。得られた混合物を、2軸押出機(東芝機械社製、型式:TEM35B)のホッパーに投入し、シリンダー温度をポリアミドの融点+30℃として混練し、サイドフィード口からガラス繊維を仕込み、ペレットを得た。
得られた試験片に、熱処理(結晶化処理)を行い、JIS K7171に準じて曲げ強さ(MPa)を求めた。
得られた試験片に、熱処理(結晶化処理)を行い、JIS K7113に準じて引張伸び率を測定した。
結果を表2に示す。
Claims (11)
- ジアミン構成単位の70モル%以上がキシリレンジアミンに由来するジアミン(A)とジカルボン酸構成単位の50モル%以上がセバシン酸に由来するジカルボン酸(B)を重縮合したポリアミド樹脂であって、反応性官能基濃度が100μeq/g以上で、反応したジカルボン酸に対する反応したジアミンのモル比(反応したジアミンのモル数/反応したジカルボン酸のモル数)が1.0以上であることを特徴とする反応性ポリアミド樹脂。
- 反応性官能基が、ポリアミド樹脂の末端に存在することを特徴とする請求項1に記載の反応性ポリアミド樹脂。
- 反応性官能基が、カルボキシル基及び/又はアミノ基であることを特徴とする請求項1又は2に記載の反応性ポリアミド樹脂。
- アミノ基濃度が50μeq/g以上であることを特徴とする請求項3に記載の反応性ポリアミド樹脂。
- 数平均分子量が、20,000以下であることを特徴とする請求項1~4のいずれか1項に記載の反応性ポリアミド樹脂。
- キシリレンジアミンが、メタキシリレンジアミン又はパラキシリレンジアミンであることを特徴とする請求項1~5のいずれか1項に記載の反応性ポリアミド樹脂。
- キシリレンジアミンが、メタキシリレンジアミンとパラキシリレンジアミンの混合物であることを特徴とする請求項1~5のいずれか1項に記載の反応性ポリアミド樹脂。
- 前記反応モル比が1.015以下である、請求項1~7のいずれか1項に記載の反応性ポリアミド樹脂。
- 反応性官能基がポリアミド樹脂の末端に存在し、かつ、カルボキシル基およびアミノ基であり、末端アミノ基濃度が50μeq/g以上である、請求項1~8のいずれか1項に記載の反応性ポリアミド樹脂。
- 請求項1~9のいずれか1項に記載の反応性ポリアミド樹脂100質量部に、エラストマーを0.5~100質量部配合してなることを特徴とするポリアミド樹脂組成物。
- エラストマーは、ポリオレフィン系エラストマー、ジエン系エラストマー、ポリスチレン系エラストマー、ポリアミド系エラストマー、ポリエステル系エラストマー、ポリウレタン系エラストマー並びにシリコン系エラストマーから選ばれるエラストマーまたはそれに官能基を導入したエラストマーであることを特徴とする請求項10に記載のポリアミド樹脂組成物。
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KR101299407B1 (ko) | 2013-08-23 |
KR20130018340A (ko) | 2013-02-20 |
CA2804131A1 (en) | 2012-12-13 |
TWI401276B (zh) | 2013-07-11 |
ZA201209368B (en) | 2014-03-26 |
US20130123439A1 (en) | 2013-05-16 |
ES2624147T3 (es) | 2017-07-13 |
EP2586813A1 (en) | 2013-05-01 |
EP2586813B1 (en) | 2017-04-05 |
BR112012033451A2 (pt) | 2016-11-22 |
JPWO2012169334A1 (ja) | 2015-02-23 |
TW201302852A (zh) | 2013-01-16 |
EP2586813A4 (en) | 2014-01-08 |
CN103080188B (zh) | 2014-10-29 |
US8993677B2 (en) | 2015-03-31 |
CA2804131C (en) | 2013-10-29 |
CN103080188A (zh) | 2013-05-01 |
JP5168432B2 (ja) | 2013-03-21 |
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