Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
  • C08L51/06—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
  • B29B7/00—Mixing; Kneading
  • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
  • B29B7/58—Component parts, details or accessories; Auxiliary operations
  • B29B7/72—Measuring, controlling or regulating
  • B29B7/726—Measuring properties of mixture, e.g. temperature or density
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
  • B29B7/00—Mixing; Kneading
  • B29B7/80—Component parts, details or accessories; Auxiliary operations
  • B29B7/88—Adding charges, i.e. additives
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
  • B29B7/00—Mixing; Kneading
  • B29B7/80—Component parts, details or accessories; Auxiliary operations
  • B29B7/88—Adding charges, i.e. additives
  • B29B7/90—Fillers or reinforcements, e.g. fibres
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
  • B29B9/00—Making granules
  • B29B9/12—Making granules characterised by structure or composition
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
  • C08F222/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides, or nitriles thereof
  • C08F222/04—Anhydrides, e.g. cyclic anhydrides
  • C08F222/06—Maleic anhydride
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
  • C08F255/00—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00
  • C08F255/02—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00 on to polymers of olefins having two or three carbon atoms
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
  • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
  • C08L23/04—Homopolymers or copolymers of ethene
  • C08L23/08—Copolymers of ethene
  • C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing four or more carbon atoms
  • C08L23/0815—Copolymers of ethene with unsaturated hydrocarbons only containing four or more carbon atoms with aliphatic 1-olefins containing one carbon-to-carbon double bond
• • 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
  • C08L77/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
• • 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
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
  • B29B7/00—Mixing; Kneading
  • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
  • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
  • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
  • B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
  • B29B7/48—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
  • B29B9/00—Making granules
  • B29B9/02—Making granules by dividing preformed material
  • B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
  • C08F4/00—Polymerisation catalysts
  • C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
  • C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
  • C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
  • C08F4/62—Refractory metals or compounds thereof
  • C08F4/64—Titanium, zirconium, hafnium or compounds thereof
  • C08F4/659—Component covered by group C08F4/64 containing a transition metal-carbon bond
  • C08F4/65908—Component covered by group C08F4/64 containing a transition metal-carbon bond in combination with an ionising compound other than alumoxane, e.g. (C6F5)4B-X+
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
  • C08F4/00—Polymerisation catalysts
  • C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
  • C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
  • C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
  • C08F4/62—Refractory metals or compounds thereof
  • C08F4/64—Titanium, zirconium, hafnium or compounds thereof
  • C08F4/659—Component covered by group C08F4/64 containing a transition metal-carbon bond
  • C08F4/65912—Component covered by group C08F4/64 containing a transition metal-carbon bond in combination with an organoaluminium compound
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L2203/00—Applications
  • C08L2203/30—Applications used for thermoforming

Definitions

• the present invention relates to a graft-modified ethylene/ ⁇ -olefin copolymer with excellent impact resistance, a polyamide composition containing the graft-modified ethylene/ ⁇ -olefin copolymer, and uses thereof.
• polyamide nylon
• nylon is used as an engineering plastic for various electrical and electronic parts, mechanical parts and automobile parts.
• molded products have become thinner, smaller, and more complex in recent years, and polyamide resins are required to improve the balance between mechanical strength such as impact resistance and rigidity and fluidity during molding. ing.
• Patent Document 1 As a method for improving the impact resistance of polyamides, a method has been proposed in which an ethylene/ ⁇ -olefin copolymer grafted with ⁇ , ⁇ -unsaturated carboxylic acid is used as an impact modifier (Patent Document 1).
• Patent Document 1 an ethylene/ ⁇ -olefin copolymer grafted with ⁇ , ⁇ -unsaturated carboxylic acid is used as an impact modifier.
• Patent Document 2 a method of adding a polyhydric alcohol having a melting point of 150 to 200°C has been proposed.
• Patent Document 2 a method of adding a polyhydric alcohol having a melting point of 150 to 200°C.
• polyhydric alcohol may bleed out to the surface layer of the molded article obtained by adding a polyhydric alcohol.
• Patent Documents 3 and 4 disclose that a polyamide composition having excellent mechanical strength, moldability and surface appearance can be obtained by using a specific diamine as a diamine component constituting a polyamide. The effect is still not sufficient.
• Ethylene/ ⁇ -olefin copolymers grafted with ⁇ , ⁇ -unsaturated carboxylic acids which have been proposed in the past, are still insufficient in improving impact resistance depending on the application.
• An object of the present invention is to obtain a suitable graft-modified ethylene/ ⁇ -olefin copolymer as an impact resistance modifier for engineering plastics such as polyamides, and to improve impact resistance, particularly impact resistance at low temperatures.
• An object of the present invention is to obtain an improved polyamide composition.
• the present invention relates to a graft-modified ethylene-based polymer (X) obtained by graft-modifying an ethylene/ ⁇ -olefin copolymer (A) satisfying the following requirements (Ai) to (A-iv) with a polar compound. .
• a graft-modified ethylene-based polymer (X) obtained by graft-modifying an ethylene/ ⁇ -olefin copolymer (A) satisfying the following requirements (Ai) to (A-iv) with a polar compound. .
• the content of the structural unit (a) derived from ethylene is 51 to 99 mol%
• the content of the structural unit (b) derived from an ⁇ -olefin having 5 to 20 carbon atoms is In the range of 1 to 49 mol % [where the total of the structural unit (a) and the structural unit (b) is 100 mol %. ].
• the graft-modified ethylene-based polymer (X) of the present invention itself is excellent in impact resistance, flexibility and fluidity. Further, by adding the graft-modified ethylene-based polymer (X) of the present invention to engineering plastics such as polyamide, impact resistance, flexibility, fluidity, heat shock resistance, etc. of engineering plastics can be improved. Since it is excellent, it can be suitably used as a material for improving physical properties of engineering plastics.
• the ethylene/ ⁇ -olefin copolymer (A) which is the starting material for the graft-modified ethylene polymer (X) of the present invention, is an ethylene copolymer that satisfies the following requirements (Ai) to (A-iv). be.
• the ethylene/ ⁇ -olefin copolymer (A) contains a structural unit (a) derived from ethylene and a structural unit (b) derived from an ⁇ -olefin having 5 to 20 carbon atoms, and the structural unit (a) and the structural It contains 51 to 99 mol% of the structural unit (a) and 1 to 49 mol% of the structural unit (b) relative to the total 100 mol% of the units (b).
• the lower limit of the content of the structural unit (a) with respect to the total 100 mol% of the structural unit (a) and the structural unit (b) is preferably 60 mol%, more preferably 70 mol%, 75 It is more preferably 80 mol %, more preferably 80 mol %, and the upper limit of the content of the structural unit (a) is preferably 97 mol %, more preferably 94 mol %. , more preferably 90 mol %, particularly preferably 86 mol %.
• the lower limit of the content of the structural unit (b) with respect to the total 100 mol% of the structural unit (a) and the structural unit (b) is preferably 3 mol%, more preferably 6 mol%. , more preferably 10 mol%, particularly preferably 14 mol%, and the upper limit of the content of the structural unit (b) is preferably 40 mol%, preferably 30 mol%. It is more preferably 25 mol %, and particularly preferably 20 mol %.
• ⁇ -olefins having 5 to 20 carbon atoms constituting the ethylene/ ⁇ -olefin copolymer (A) according to the present invention include 1-pentene, 1-hexene, 1-octene and 1-decene.
• ⁇ -olefins having 6 to 15 carbon atoms are preferable, ⁇ -olefins having 6 to 12 carbon atoms are more preferable, and 1-hexene, 1-octene and 1-decene are more preferable. , 1-octene are particularly preferred.
• ⁇ -olefins having 5 to 20 carbon atoms may be one or two or more ⁇ -olefins.
• (A-ii) It has a density in the range of 0.850 to 0.875 g/cm 3 .
• the lower limit of the density is preferably 0.853 g/cm 3 , more preferably 0.855 g/cm 3 and even more preferably 0.858 g/cm 3 .
• the upper limit of the density is preferably 0.874 g/cm 3 , more preferably 0.872 g/cm 3 and even more preferably 0.870 g/cm 3 .
• the graft-modified ethylene-based polymer (X) obtained by graft-modifying the ethylene/ ⁇ -olefin copolymer (A) with a polar compound has excellent impact resistance.
• the melt flow rate (MFR) at 190° C. and 2.16 kg load is in the range of 0.1 to 25 g/10 minutes.
• the lower limit of the melt flow rate range is preferably 0.8 g/10 minutes, more preferably 0.9 g/10 minutes, still more preferably 1.0 g/10 minutes, and particularly preferably 1.1 g/10 minutes. be.
• the upper limit of the melt flow rate range is preferably 22 g/10 minutes, more preferably 20 g/10 minutes, even more preferably 19 g/10 minutes, and particularly preferably 18 g/10 minutes.
• the graft-modified ethylene-based polymer (X) obtained by graft-modifying the ethylene/ ⁇ -olefin copolymer (A) with a polar compound has excellent impact resistance.
• ] is in the range of 0.16 to 1.00/1000C.
• the lower limit of the total amount of double bonds is preferably 0.18/1000C, more preferably 0.19/1000C, even more preferably 0.20/1000C, and 0 .22/1000C is particularly preferred.
• the upper limit of the total amount of double bonds is preferably 0.95/1000C, more preferably 0.90/1000C, even more preferably 0.85/1000C, and 0 .80/1000C is particularly preferred.
• ⁇ Double bond amount (unsaturated bond amount)> The amount of double bonds was quantified by 1 H-NMR measurement of the ethylene/ ⁇ -olefin copolymer (A) (manufactured by JEOL Ltd., "ECX400P nuclear magnetic resonance apparatus").
• signals derived from double bonds a vinyl type double bond (vinyl group), a vinylidene type double bond (vinylidene group), a disubstituted olefin type double bond and a trisubstituted olefin type double bond were observed. be.
• the amount of double bond was quantified from the integrated intensity of each signal.
• the main chain methylene signal of the ethylene/ ⁇ -olefin copolymer (A) was used as the chemical shift standard (1.2 ppm).
• the total amount of vinyl groups and vinylidene groups is determined as the amount of double bonds at the end of the molecule, the total amount of disubstituted olefin type double bonds and trisubstituted olefin type double bonds is determined as the amount of internal unsaturated bonds, and the total amount of double bonds (Total amount of double bonds) was determined as the sum of each double bond. Analysis was performed with a limit of quantification of 0.1/1000C, and when a signal was confirmed even in the case of less than 0.1/1000C, the calibration curve was extrapolated to calculate the amount of double bond.
• Peaks of hydrogen atoms a to e are observed near the following.
• ⁇ Peak of hydrogen atom a 4.60 ppm ⁇ Peak of hydrogen atom b: 4.85 ppm ⁇ Peak of hydrogen atom c: 5.10 ppm ⁇ Peak of hydrogen atom d: 5.25 ppm ⁇ Peak of hydrogen atom e: 5.70 ppm
• a quantitative formula for the amount of double bonds is as follows.
• the ethylene/ ⁇ -olefin copolymer containing less than 0.16 double bonds/1000C is a graft-modified ethylene-based polymer obtained by graft modification with a polar compound.
• the molecular weight is significantly reduced, if the total amount of double bonds contained in the ethylene/ ⁇ -olefin copolymer is within the scope of the present invention, that is, 0.16 to 1.00/1000C, grafting It suppresses the decrease in the molecular weight of the modified ethylene polymer and is effective in improving the impact resistance. On the other hand, if the total amount of double bonds exceeds the above range, the molecular weight of the graft-modified ethylene-based polymer increases, and when blended with a polyamide, the flowability of the resulting composition may decrease.
• One embodiment of the graft-modified ethylene-based polymer (X) of the present invention is a graft-modified ethylene-based polymer obtained by graft-modifying the ethylene/ ⁇ -olefin copolymer (A) with a polar compound. Meet requirements (Xi) and (Xii).
• MFR 10 /MFR 2.16 is 10 or more, preferably 10 to 20, more preferably 10 to 15, even more preferably 10 to 12.5 (however, MFR 10 is ASTM D1238 and MFR 2.16 is the melt flow rate measured at 190°C and 2.16 kg load by the method of ASTM D1238). MFR 10 /MFR 2.16 is a value considered to be one of the indicators of the degree of long chain branching of a polymer, and a smaller MFR 10 /MFR 2.16 indicates less long chain branching. When MFR10/ MFR2.16 is 10 or more, the impact resistance and fluidity are excellent.
• the graft-modified ethylene-based polymer having an MFR 10 /MFR 2.16 of less than 10 has a high viscosity under high shear stress during kneading with polyamide, although the reason is not clear. It is considered that the impact resistance is lowered due to the deterioration of the properties.
• the graft amount of the polar compound is 0.1 to 5% by mass.
• the lower limit of the graft amount of the polar compound is preferably 0.3% by mass, more preferably 0.55% by mass, further preferably 0.6% by mass, and 0.3% by mass. 8% by mass is particularly preferred.
• the upper limit of the graft amount of the polar compound is preferably 4% by mass, more preferably 3% by mass, even more preferably 2% by mass, and 1.7% by mass. Especially preferred.
• a graft-modified ethylene polymer in which the amount of grafting of the polar compound is less than the above lower limit may have reduced compatibility with the polyamide, and the impact resistance of the resulting composition may be reduced. If the graft-modified ethylene-based polymer exceeds , the interaction with the polyamide becomes too strong, and the flowability of the obtained composition may decrease.
• the polar compound for graft-modifying the ethylene/ ⁇ -olefin copolymer (A) according to the present invention includes a hydroxyl group-containing ethylenically unsaturated compound, an amino group-containing ethylenically unsaturated compound, an epoxy group-containing ethylenically unsaturated compound, an aromatic is at least one polar compound selected from group vinyl compounds, unsaturated carboxylic acids and derivatives thereof, vinyl ester compounds, and vinyl chloride.
• unsaturated carboxylic acids and derivatives thereof are preferred.
• unsaturated carboxylic acids and derivatives thereof include unsaturated carboxylic acids having 3 to 10 carbon atoms, preferably 3 to 8 carbon atoms, and the unsaturated carboxylic acids.
• Derivatives of carboxylic acids are mentioned.
• Derivatives of unsaturated carboxylic acids include, for example, anhydrides, esters, amides and imides of unsaturated carboxylic acids.
• unsaturated carboxylic acids include monobasic acids such as acrylic acid and methacrylic acid; dibasic acids such as maleic acid, fumaric acid, itaconic acid, citraconic acid, and 5-norbornene-2,3-dicarboxylic acid. are mentioned.
• Examples of the acid anhydrides of unsaturated carboxylic acids include acid anhydrides of dibasic acids such as maleic acid, itaconic acid, citraconic acid, and 5-norbornene-2,3-dicarboxylic acid.
• Examples of the unsaturated carboxylic acid ester include methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, glycidyl acrylate, monoethyl maleate, diethyl maleate, monomethyl fumarate, and fumaric acid.
• Esters and half esters such as dimethyl ester, itaconic acid monomethyl ester, and itaconic acid diethyl ester can be mentioned.
• Examples of the unsaturated carboxylic acid amide include acrylamide, methacrylamide, maleic acid monoamide, maleic acid diamide, maleic acid-N-monoethylamide, maleic acid-N,N-diethylamide, maleic acid-N-monobutyl amides, maleic acid-N,N-dibutylamide, fumaric acid monoamide, fumaric acid diamide, fumaric acid-N-monobutylamide, fumaric acid-N,N-dibutylamide.
• Examples of the unsaturated carboxylic acid imide include maleimide, N-butylmaleimide, and N-phenylmaleimide.
• maleic anhydride-graft-modified ethylene 1- Octene copolymers are preferred.
• the grafting amount of maleic anhydride is in the range of 0.1 to 3% by mass.
• the lower limit of the graft amount of maleic anhydride is preferably 0.4% by mass, more preferably 0.55% by mass, and even more preferably 0.6% by mass.
• the upper limit of the graft amount of maleic anhydride is preferably 4% by mass, more preferably 3% by mass, and even more preferably 2% by mass.
• the graft-modified ethylene-based polymer (X) contains a structural unit (a) derived from ethylene and a structural unit (b) derived from an ⁇ -olefin having 5 to 20 carbon atoms, and comprises the structural unit (a) and the structural unit ( It contains 51 to 99 mol% of the structural unit (a) and 1 to 49 mol% of the structural unit (b) based on the total 100 mol% of b).
• the lower limit of the content of the structural unit (a) with respect to the total 100 mol% of the structural unit (a) and the structural unit (b) is preferably 60 mol%, more preferably 70 mol%, 75 It is more preferably 80 mol %, more preferably 80 mol %, and the upper limit of the content of the structural unit (a) is preferably 97 mol %, more preferably 94 mol %. , more preferably 90 mol %, particularly preferably 86 mol %.
• the lower limit of the content of the structural unit (b) with respect to the total 100 mol% of the structural unit (a) and the structural unit (b) is preferably 3 mol%, more preferably 6 mol%. , more preferably 10 mol%, particularly preferably 14 mol%, and the upper limit of the content of the structural unit (b) is preferably 40 mol%, preferably 30 mol%. It is more preferably 25 mol %, and particularly preferably 20 mol %.
• the density is in the range of 0.850-0.880 g/cm 3 .
• the lower limit of the density is preferably 0.853 g/cm 3 , more preferably 0.855 g/cm 3 and even more preferably 0.858 g/cm 3 .
• the upper limit of the density is preferably 0.877 g/cm 3 , more preferably 0.865 g/cm 3 and even more preferably 0.874 g/cm 3 .
• the melt flow rate (MFR) at 190° C. and 2.16 kg load is in the range of 0.1 to 25 g/10 minutes.
• the lower limit of the melt flow rate range is preferably 0.2 g/10 minutes, more preferably 0.3 g/10 minutes, even more preferably 0.35 g/10 minutes, and particularly preferably 0.4 g/10 minutes. be.
• the upper limit of the melt flow rate range is preferably 22 g/10 minutes, more preferably 20 g/10 minutes, still more preferably 15 g/10 minutes, and particularly preferably 10 g/10 minutes.
• the graft-modified ethylene polymer of the present invention can be produced by grafting a polar compound onto the ethylene/ ⁇ -olefin copolymer (A) by various known methods.
• the ethylene/ ⁇ -olefin copolymer (A) is dissolved in an organic solvent, and then a polar compound such as an unsaturated carboxylic acid or a derivative thereof and, if necessary, an organic peroxide are added to the resulting solution.
• a radical initiator such as a product and usually react at a temperature of 60 to 350 ° C., preferably 80 to 190 ° C. for 0.5 to 15 hours, preferably 1 to 10 hours, or use an extruder etc.
• an ethylene/ ⁇ -olefin copolymer (A), an unsaturated carboxylic acid or a derivative thereof and, if necessary, a radical initiator such as an organic peroxide are added, and usually ethylene/ ⁇ - A method of reacting at the melting point of the olefin copolymer (A) or higher, preferably at 160 to 350° C. for 0.5 to 10 minutes, can be employed.
• the amount of graft modification of the ethylene/ ⁇ -olefin copolymer (A) is determined by measuring the amount of structural units derived from a polar compound such as an unsaturated carboxylic acid or a derivative thereof (amount of graft modification) using an infrared absorption analyzer. The intensity of the peak derived from the unit (1790 cm -1 when maleic anhydride was used) was measured and quantified using a calibration curve prepared in advance.
• the graft-modified ethylene polymer (X) of the present invention may contain other additives such as heat stabilizers, weather stabilizers, light stabilizers, anti-aging agents, antioxidants, fatty acid metal salts, softeners, Additives such as agents, dispersants, colorants, pigments, ultraviolet absorbers, and nucleating agents may be blended within limits that do not impair the object of the present invention.
• the graft-modified ethylene-based polymer (X) of the present invention itself is excellent in impact resistance, flexibility and fluidity. Since it is excellent in improving flexibility, fluidity, heat shock resistance, etc., it can be suitably used as a physical property improving material for engineering plastics.
• the polyamide (P) according to the present invention is not particularly limited, and various polyamides such as conventionally known aliphatic polyamides, semi-aromatic polyamides, and aromatic polyamides (also called nylon ) can be used without restrictions.
• various polyamides such as conventionally known aliphatic polyamides, semi-aromatic polyamides, and aromatic polyamides (also called nylon ) can be used without restrictions.
• lactams or melt moldable polyamides obtained by the polycondensation reaction of diamines and dicarboxylic acids can be used.
• Specific examples of polyamide (P) include the following polymers.
• a polycondensation product of an organic dicarboxylic acid having 4 to 12 carbon atoms and an organic diamine having 2 to 13 carbon atoms such as polyhexamethyleneadipamide, which is a polycondensation product of hexamethylenediamine and adipic acid [ 6,6 nylon], polyhexamethyleneazelamide [6,9 nylon], which is a polycondensate of hexamethylenediamine and azelaic acid, and polyhexamethylenesebacamide, which is a polycondensate of hexamethylenediamine and sebacic acid.
• polyhexamethyleneadipamide which is a polycondensation product of hexamethylenediamine and adipic acid [ 6,6 nylon]
• polyhexamethyleneazelamide [6,9 nylon] which is a polycondensate of hexamethylenediamine and azelaic acid
• polyhexamethylenesebacamide which is a polycondensate of
• organic dicarboxylic acid examples include adipic acid, pimelic acid, suberic acid, phthalic acid, terephthalic acid, isophthalic acid, naphthalenedicarboxylic acid, phenylenedioxydiacetic acid, oxydibenzoic acid, diphenylmethanedicarboxylic acid, diphenylsulfonedicarboxylic acid, biphenyl dicarboxylic acid, sebacic acid, dodecanedioic acid and the like.
• organic diamine examples include hexamethylenediamine, octamethylenediamine, nonanediamine, octanediamine, decanediamine, undecanediamine, and dodecanediamine.
• Polycondensates of ⁇ -amino acids such as polyundecaneamide [11 Nylon], which is a polycondensate of ⁇ -aminoundecanoic acid.
• Ring-opening polymers of lactams such as polycapramide [6 nylon], which is a ring-opening polymer of ⁇ -caprolactam, and polylaurinlactam [12 nylon], a ring-opening polymer of ⁇ -laurolactam.
• polyamides (P) exemplified above aliphatic polyamides are preferable, and polyhexamethyleneadipamide [6,6 nylon], polyhexamethyleneazelamide [6,9 nylon], polycapramide [6 nylon], polylaurin Lactam [12 nylon] is more preferred, and polyhexamethylene adipamide [6,6 nylon] and polycapramide [6 nylon] are even more preferred.
• the melting point of the polyamide (P) is preferably 150-330°C, more preferably 150-270°C. It is preferable that the melting point is equal to or lower than the above upper limit in that decomposition and volatilization of the graft-modified ethylene-based polymer are suppressed during molding. Further, it is preferable that the melting point is equal to or higher than the above lower limit in terms of the impact strength of the resulting polyamide composition.
• the polyamide (P) for example, a polyamide produced from adipic acid, isophthalic acid and hexamethylenediamine can be used, and two or more kinds such as a mixture of 6 nylon and 6,6 nylon can be used. can also be used.
• the polyamide composition of the present invention contains 50 to 99% by mass of the polyamide (P) and 1 to 50% by mass of the modified ethylene polymer (X) [however, the polyamide (P) and the graft modified ethylene polymer ( The sum of X) is taken as 100% by mass. ].
• the lower limit of the polyamide (P) content is preferably 60% by mass or more, more preferably 70% by mass or more, and still more preferably 80% by mass or more.
• the upper limit is preferably 95% by mass or less, more preferably 93% by mass or less, and even more preferably 90% by mass or less.
• the lower limit of the content of the modified ethylene polymer (X) is preferably 5% by mass or more, more preferably 7% by mass or more, and still more preferably 10% by mass or more, and the upper limit is preferably It is 40% by mass or less, more preferably 30% by mass or less, and still more preferably 20% by mass or less.
• the polyamide composition of the present invention can provide a molded article having excellent impact resistance, especially low-temperature impact resistance and fluidity.
• the polyamide composition of the present invention contains, in addition to the polyamide (P) and the graft-modified ethylene polymer (X), other synthetic resins, other rubbers, oxidation Additives such as inhibitors, heat stabilizers, weather stabilizers, slip agents, antiblocking agents, crystal nucleating agents, pigments, hydrochloric acid absorbers, copper damage inhibitors, etc., are usually added in an amount of 0.01 per 100 parts by mass of the polyamide composition. It may contain up to 10 parts by weight, preferably 0.1 to 5 parts by weight.
• the polyamide composition of the present invention generally contains 1 to 100 parts by mass, preferably 5 to 80 parts by mass, more preferably 10 to 70 parts by mass of a filler with respect to 100 parts by mass of the polyamide composition. It is good also as a containing polyamide composition.
• a filler-containing polyamide composition is useful when it is desired to further improve the mechanical strength of a molded article, or when a molded article having an adjusted coefficient of linear expansion (molding shrinkage) is required.
• fillers examples include fillers such as fibrous fillers, granular fillers, and plate-like fillers.
• fibrous fillers include glass fibers, carbon fibers, aramid fibers, etc.
• Suitable examples of glass fibers include chopped strands having an average fiber diameter of 6 to 14 ⁇ m.
• Specific examples of granular or plate-like fillers include calcium carbonate, mica, glass flakes, glass balloons, magnesium carbonate, silica, talc, clay, pulverized carbon fibers and aramid fibers, and the like. These fillers are not included in the above additives.
• the polyamide composition of the present invention is prepared by melt-kneading, for example, the polyamide (P), the graft-modified ethylene-based polymer (X), and optional additives by various conventionally known methods. be done. Specifically, the above components are simultaneously or sequentially charged into, for example, a Henschel mixer, a V-type blender, a tumbler mixer, a ribbon blender, etc. and mixed, and then a single screw extruder, a multi-screw extruder, a kneader, It is obtained by melt-kneading with a Banbury mixer or the like.
• the polyamide composition and filler-containing polyamide composition of the present invention can be subjected to known molding such as injection molding, extrusion molding, inflation molding, blow molding, extrusion blow molding, injection blow molding, press molding, vacuum molding, calender molding, and foam molding. Depending on the method, it can be molded into various molded bodies, and can be applied to various known uses.
• the normal hexane/toluene mixed solution was led to a connecting pipe whose jacket portion was heated with 3 kg/cm 2 steam so that the mixed solution reached 150°C.
• a supply port for injecting methanol, which is a catalyst deactivator, is provided immediately before reaching the connecting pipe. It was combined with a normal hexane/toluene mixed solution.
• the normal hexane/toluene mixed solution of the ethylene/1-octene copolymer kept at about 200°C in the connecting pipe with a steam jacket was maintained at about 2.5 MPaG, the pressure provided at the end of the connecting pipe.
• the liquid was continuously sent to the flash tank by adjusting the opening of the control valve.
• the solution temperature and the opening of the pressure control valve were set so that the pressure in the flash tank was maintained at about 0.05 MPaG and the temperature of the steam part in the flash tank was maintained at about 200°C. was broken Thereafter, the strand was passed through a single-screw extruder whose die temperature was set at 190° C., cooled in a water tank, and cut with a pellet cutter to obtain an ethylene/1-octene copolymer as pellets. The yield was 7.3 kg/2hr.
• Example 1 ⁇ Production of graft-modified ethylene/1-octene copolymer (X-1)> Extruder TEX30 (manufactured by Japan Steel Works, Ltd.), ethylene / 1-octene copolymer (A-1): 100 parts by mass, maleic anhydride: 1.2 parts by mass, Perhexa 25B (2,5-dimethyl-2 , 5-di(t-butylperoxy)hexane, manufactured by NOF Corporation, decomposition temperature with a half-life of 1 minute: 179.8 ° C.) 0.06 parts by mass was added and operated under the following conditions, A graft-modified ethylene/1-octene copolymer (X-1) was obtained. The density, maleic anhydride graft amount (modified amount) and MFR of the obtained polymer were measured, and the results are shown in Table 1.
• Example 2 ⁇ Production of graft-modified ethylene/1-octene copolymer (X-2)> Example 1 except that the ethylene/1-octene copolymer (A-1) used in Example 1 was replaced with the ethylene/1-octene copolymer (A-2) obtained in Production Example 2. to obtain a graft-modified ethylene/1-octene copolymer (X-2).
• the density, maleic anhydride graft amount (modified amount) and MFR of the obtained polymer were measured, and the results are shown in Table 1.
• Example 3 ⁇ Production of graft-modified ethylene/1-octene copolymer (X-3)>
• an ethylene/1-octene copolymer (A-3) [manufactured by Mitsui Chemicals, trade name Toughmer H-5030S] was used.
• a graft-modified ethylene/1-octene copolymer (X-3) was obtained in the same manner as in Example 1 except that the The density, maleic anhydride graft amount (modified amount) and MFR of the obtained polymer were measured, and the results are shown in Table 1.
• Example 4 ⁇ Production of graft-modified ethylene/1-octene copolymer (X-4)>
• ethylene/1-octene copolymer (A-1) used in Example 1
• an ethylene/1-octene copolymer (A-4) [manufactured by Mitsui Chemicals, trade name TAFMER H-1030S] was used.
• a graft-modified ethylene/1-octene copolymer (X-4) was obtained in the same manner as in Example 1 except that the The density, maleic anhydride graft amount (modified amount) and MFR of the obtained polymer were measured, and the results are shown in Table 1.
• Melt flow rate (MFR) Melt flow rate (MFR) was measured according to ASTM D1238 under conditions of 190° C., 2.16 kg load and 190° C., 10 kg load.
• Test piece 10 mm (width) x 80 mm (length) x 4 mm (thickness) [Fluidity (spiral flow)] Using an injection molding machine with a cylinder temperature of 280°C, an injection pressure of 100 MPa, and a mold temperature of 80°C with a clamping force of 50 tons, injection molding is performed into a mold with a spiral groove of 3.8 mm ⁇ semicircle, and the flow distance is adjusted. It was measured.
• Example 6 Polyamide composition pellets were prepared in the same manner as in Example 5 except that the graft-modified ethylene/1-octene copolymer (X-1) was changed to the graft-modified ethylene/1-octene copolymer (X-2). Then, a test piece for physical property test was produced. Table 2 shows the results.
• Example 7 Polyamide composition pellets were prepared in the same manner as in Example 5 except that the graft-modified ethylene/1-octene copolymer (X-1) was changed to the graft-modified ethylene/1-octene copolymer (X-3). Then, a test piece for physical property test was produced. Table 2 shows the results.
• Example 8 Polyamide composition pellets were prepared in the same manner as in Example 5 except that the graft-modified ethylene/1-octene copolymer (X-1) was changed to the graft-modified ethylene/1-octene copolymer (X-4). Then, a test piece for physical property test was produced. Table 2 shows the results.
• Example 10 Pellets of the polyamide composition were prepared in the same manner as in Example 5 except that the graft-modified ethylene/1-octene copolymer (X-1) was not used, and test pieces for physical property tests were prepared. Table 2 shows the results.
• Example 11 Pellets of the polyamide composition were prepared in the same manner as in Example 9 except that the graft-modified ethylene/1-octene copolymer (X-1) was not used, and test pieces for physical property tests were prepared. Table 2 shows the results.

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