Polar-group-containing olefin copolymer, polar-group-containing multinary olefin copolymer, olefin-based resin composition, and adhesive and layered product each using the same

Abstract

A polar-group-containing olefin copolymer which comprises 99.999 to 80 mol % of structural units derived from at least one of ethylene and α-olefin having 3 to 20 carbon atoms and 20 to 0.001 mol % of structural units derived from at least one polar-group-containing monomer which contains an epoxy group and is represented by the structural formula (I) or structural formula (II), the polar-group-containing olefin copolymer being a random copolymer obtained by copolymerization in the presence of a transition metal catalyst and having a linear molecular structure.

1 . A polar-group-containing olefin copolymer which comprises 99.999 to 80 mol % of structural units derived from at least one of ethylene and α-olefin having 3 to 20 carbon atoms and 20 to 0.001 mol % of structural units derived from at least one polar-group-containing monomer which contains an epoxy group and is represented by the following structural formula (I) or following structural formula (II), the polar-group-containing olefin copolymer being a random copolymer obtained by copolymerization in the presence of a transition metal catalyst and having a linear molecular structure: 
       
         
           
           
               
               
           
         
         (In structural formula (I), R 1  represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, and R 2 , R 3 , and R 4  each independently represent a hydrogen atom, a hydrocarbon group, or the following epoxy-group-containing specific functional group, any one of R 2  to R 4  being the following epoxy-group-containing specific functional group: 
         Specific functional group: a group which essentially contains an epoxy group and has a molecular structure comprising a carbon atom, an oxygen atom, and a hydrogen atom), 
       
       
         
           
           
               
               
           
         
         (In structural formula (II), R 5  to R 8  each independently represent a hydrogen atom, a hydrocarbon group, or the following epoxy-group-containing specific functional group, any one of R 5  to R 8  being the following epoxy-group-containing specific functional group, and m is 0 to 2: 
         Specific functional group: a group which essentially contains an epoxy group and has a molecular structure comprising a carbon atom, an oxygen atom, and a hydrogen atom) 
       
     
     
         2 . The polar-group-containing olefin copolymer according to  claim 1 , which has a melting point of 50 to 140° C., the melting point being the temperature corresponding to a maximum peak in an endothermic curve determined by differential scanning calorimetry (DSC). 
     
     
         3 . The polar-group-containing olefin copolymer according to  claim 1 , wherein the amount of aluminum (Al) in the polar-group-containing olefin copolymer is 0 to 100,000 μg per g of the copolymer. 
     
     
         4 . The polar-group-containing olefin copolymer according to  claim 1 , which has a weight-average molecular weight (Mw), as determined by gel permeation chromatography (GPC), of 1,000 to 2,000,000. 
     
     
         5 . The polar-group-containing olefin copolymer according to  claim 1 , which has a weight-average molecular weight (Mw), as determined by gel permeation chromatography (GPC), of 33,000 to 2,000,000. 
     
     
         6 . The polar-group-containing olefin copolymer according to  claim 1 , wherein the transition metal catalyst is a transition metal catalyst which comprises a chelatable ligand and a Group-5 to Group-11 metal. 
     
     
         7 . The polar-group-containing olefin copolymer according to  claim 1 , wherein the transition metal catalyst is a transition metal catalyst comprising: palladium or nickel metal; and a triarylphosphine or triarylarsine compound coordinated thereto. 
     
     
         8 . A polar-group-containing multinary olefin copolymer comprising: units of one or more nonpolar monomers (X1) selected from ethylene and α-olefins having 3 to 10 carbon atoms; units of one or more polar monomers (Z1) selected from monomers having an epoxy group; and units of any one or more non-cyclic or cyclic monomers (Z2) (with the proviso that at least one kind of units of X1, at least one kind of units of Z1, and at least one kind of units of Z2 are essentially contained), the polar-group-containing multinary olefin copolymer being a random copolymer obtained by copolymerization in the presence of a transition metal catalyst and having a linear molecular structure. 
     
     
         9 . The polar-group-containing multinary olefin copolymer according to  claim 8 , which has a ratio of weight-average molecular weight (Mw) to number-average molecular weight (Mn), as determined by gel permeation chromatography (GPC), in the range of 1.5 to 3.5. 
     
     
         10 . The polar-group-containing multinary olefin copolymer according to  claim 8 , which has a melting point Tm (° C.) satisfying 50<Tm<128−6.0[Z1] (wherein [Z1] (mol %) is the content of monomer units derived from Z1), the melting point being the temperature corresponding to a maximum peak in an endothermic curve determined by differential scanning calorimetry (DSC). 
     
     
         11 . The polar-group-containing multinary olefin copolymer according to  claim 8 , wherein the content of the units of one or more polar monomers (Z1) selected from monomers having an epoxy group is 0.001 to 20.000 mol %. 
     
     
         12 . The polar-group-containing multinary olefin copolymer according to  claim 8 , wherein the units of one or more nonpolar monomers (X1) are ethylene units. 
     
     
         13 . The polar-group-containing multinary olefin copolymer according to  claim 8 , wherein the transition metal catalyst is a transition metal catalyst which comprises a chelatable ligand and a Group-5 to Group-11 metal. 
     
     
         14 . The polar-group-containing multinary olefin copolymer according to  claim 8 , wherein the transition metal catalyst is a transition metal catalyst comprising:
 palladium or nickel metal; and a triarylphosphine or triarylarsine compound coordinated thereto.   
     
     
         15 . An olefin-based resin composition comprising: a polar-group-containing olefin copolymer (A′) and an olefin-based resin (C), the polar-group-containing olefin copolymer (A′) being a random copolymer having a linear molecular structure and obtained by copolymerizing at least one of ethylene and α-olefin having 3 to 20 carbon atoms with a polar-group-containing monomer containing an epoxy group in the presence of a transition metal catalyst, wherein the amount of the olefin-based resin (C) incorporated is 1 to 99,900 parts by weight per 100 parts by weight of the polar-group-containing olefin copolymer (A′). 
     
     
         16 . The olefin-based resin composition according to  claim 15 , wherein the polar-group-containing monomer containing an epoxy group is a polar-group-containing monomer containing an epoxy group, represented by the following structural formula (I) or following structural formula (II): 
       
         
           
           
               
               
           
         
         (In structural formula (I), R 1  represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, and R 2 , R 3 , and R 4  each independently represent a hydrogen atom, a hydrocarbon group, or the following epoxy-group-containing specific functional group, any one of R 2  to R 4  being the following epoxy-group-containing specific functional group, 
         Specific functional group: a group which essentially contains an epoxy group and has a molecular structure comprising a carbon atom, an oxygen atom, and a hydrogen atom), 
       
       
         
           
           
               
               
           
         
         (In structural formula (II), R 5  to R 8  each independently represent a hydrogen atom, a hydrocarbon group, or the following epoxy-group-containing specific functional group, any one of R 5  to R 8  being the following epoxy-group-containing specific functional group, and m is 0 to 2: 
         Specific functional group: a group which essentially contains an epoxy group and has a molecular structure comprising a carbon atom, an oxygen atom, and a hydrogen atom) 
       
     
     
         17 . The olefin-based resin composition according to  claim 15 , wherein in the polar-group-containing olefin copolymer (A′), the amount of structural units derived from at least one of ethylene and α-olefin having 3 to 20 carbon atoms is 99.999 to 80 mol % and the amount of structural units derived from the polar-group-containing monomer containing an epoxy group is 20 to 0.001 mol %. 
     
     
         18 . The olefin-based resin composition according to  claim 15 , wherein the olefin-based resin (C) is at least one of a homopolymer and a copolymer, the homopolymer and the copolymer being obtained by polymerizing a monomer selected from at least one of ethylene and α-olefin having 3 to 20 carbon atoms. 
     
     
         19 . The olefin-based resin composition according to  claim 15 , wherein the olefin-based resin (C) is either an ethylene homopolymer or a copolymer of ethylene with α-olefin having 3 to 20 carbon atoms. 
     
     
         20 . The olefin-based resin composition according to  claim 15 , wherein the polar-group-containing olefin copolymer (A′) has a melting point in the range of 50 to 140° C., the melting point being the temperature corresponding to a maximum peak in an endothermic curve determined by differential scanning calorimetry (DSC). 
     
     
         21 . The olefin-based resin composition according to  claim 15 , wherein the polar-group-containing olefin copolymer (A′) is a copolymer obtained by polymerization in the presence of a transition metal catalyst of a Group-5 to Group-11 metal having a chelatable ligand. 
     
     
         22 . The olefin-based resin composition according to  claim 15 , wherein the polar-group-containing olefin copolymer (A′) is a copolymer obtained by polymerization in the presence of a transition metal catalyst which comprises palladium or nickel metal and a triarylphosphine or triarylarsine compound coordinated thereto. 
     
     
         23 . The olefin-based resin composition according to  claim 15 , wherein the olefin-based resin (C) has a density, as measured in accordance with JIS K7112, in the range of 0.890 to 1.20 g/cm 3 . 
     
     
         24 . The olefin-based resin composition according to  claim 15 , wherein the olefin-based resin (C) has a melting point in the range of 90 to 170° C., the melting point being the temperature corresponding to a maximum peak in an endothermic curve determined by differential scanning calorimetry (DSC). 
     
     
         25 . The olefin-based resin composition according to  claim 15 , wherein the melting point of olefin-based resin (C), which is the temperature corresponding to a maximum peak in an endothermic curve determined by differential scanning calorimetry (DSC), is in the range of 119 to 170° C. 
     
     
         26 . The olefin-based resin composition according to  claim 15 , which has a heat of fusion ΔH, as determined by differential scanning calorimetry (DSC), in the range of 80 to 300 J/g. 
     
     
         27 . The olefin-based resin composition according to  claim 15 , wherein the olefin-based resin (C) has a melting point in the range of 30 to 124° C., the melting point being the temperature corresponding to a maximum peak in an endothermic curve determined by differential scanning calorimetry (DSC). 
     
     
         28 . An adhesive which comprises the polar-group-containing olefin copolymer according to  claim 1 , the polar-group-containing multinary olefin copolymer according to  claim 8 , or the olefin-based resin composition according to  claim 15 . 
     
     
         29 . A layered product which comprises: the polar-group-containing olefin copolymer according to  claim 1 , the polar-group-containing multinary olefin copolymer according to  claim 8 , or the olefin-based resin composition according to  claim 15 ; and a base layer. 
     
     
         30 . The layered product according to  claim 29 , wherein the base layer comprises at least one member selected from olefin-based resins, highly polar thermoplastic resins, metals, vapor-deposited films of inorganic oxide, paper, cellophane, woven fabric, and nonwoven fabric. 
     
     
         31 . The layered product according to  claim 29 , wherein the base layer comprises at least one member selected from polyamide-based resins, fluororesins, polyester-based resins, and ethylene/vinyl alcohol copolymers (EVOH).