Thermoplastic elastomer for carbon fiber reinforced plastic bonding lamination

Abstract

The present invention relates to a thermoplastic elastomer for carbon fiber reinforced plastic bonding lamination, which is contained in a layer to be laminated on a layer composed of a carbon-fiber reinforced plastic, wherein the thermoplastic elastomer for carbon fiber reinforced plastic bonding lamination contains a styrene-based thermoplastic elastomer and a polymer modified by an α,β-unsaturated carboxylic acid, the styrene-based thermoplastic elastomer contains components (a) to (d), and a concentration of an α,β-unsaturated carboxylic acid derived from the polymer modified by the α,β-unsaturated carboxylic acid is 0.01 to 10% by mass.

1 . A laminated molded article, comprising:
 a layer of a carbon fiber reinforced plastic; and   a layer of a thermoplastic elastomer;   wherein   the thermoplastic elastomer comprises a styrene-based thermoplastic elastomer and a polymer modified by an α,β-unsaturated carboxylic acid, and   the styrene-based thermoplastic elastomer comprises: an (A)-(C)-(A) triblock copolymer (c) having a vinyl aromatic compound polymer block (A) and a conjugated diene polymer block (C), wherein the conjugated diene polymer block (C) is constituted of isoprene, and a part or all of carbon-carbon double bonds based on isoprene are hydrogenated.   
     
     
         2 . The laminated molded article according to  claim 1 , wherein the polymer modified by the α,β-unsaturated carboxylic acid comprises a polyolefin modified by the a,β-unsaturated carboxylic acid. 
     
     
         3 . The laminated molded article according to  claim 2 , wherein the polyolefin modified by the α,β-unsaturated carboxylic acid comprises a polypropylene modified by maleic anhydride. 
     
     
         4 . The laminated molded article according to  claim 1 , wherein the styrene-based thermoplastic elastomer further comprises: (a) a hydrogenated (A)-(B) block copolymer and/or a hydrogenated (A)-(B)-(A) block copolymer;
 wherein   block (A) is composed of a vinyl aromatic compound,   block (B) is composed of a conjugated diene polymer, comprising one or more selected from the group consisting of butadiene, 1,3-pentadiene, 2,3-dimethyl-1,3-butadiene, 2-methyl-1,3-pentadiene, 1,3-hexadiene, 4,5-diethyl-1,3-octadiene, and 3-butyl-1,3-octadiene, or   block (B) is composed of a combination of isoprene and one or more conjugated diene monomers selected from the group consisting of butadiene, 1,3-pentadiene, 2,3-dimethyl-1,3-butadiene, 2-methyl-1,3-pentadiene, 1,3-hexadiene, 4,5-diethyl-1,3-octadiene, and 3-butyl-1,3-octadiene,   at least 80% of double bonds of the conjugated diene moiety of the conjugated diene polymer block (B) is saturated through hydrogenation, and   a weight average molecular weight of (a) the hydrogenated (A)-(B) block copolymer and/or a hydrogenated (A)-(B)-(A) block copolymer is from 80,000 to 1,000,000.   
     
     
         5 . The laminated molded article according to  claim 4 , wherein the styrene-based thermoplastic elastomer further comprises (b) a hydrocarbon softening agent for rubber. 
     
     
         6 . The laminated molded article according to  claim 5 , wherein a content of the (A)-(C)-(A) triblock copolymer (c) is 20 to 300 parts by mass based on 100 parts by mass of the sum total of (a) the hydrogenated (A)-(B) block copolymer and/or a hydrogenated (A)-(B)-(A) block copolymer and (b) the hydrocarbon softening agent for rubber. 
     
     
         7 . The laminated molded article according to  claim 6 , wherein the styrene-based thermoplastic elastomer further comprises: an olefin-based crystalline resin (d). 
     
     
         8 . The laminated molded article according to  claim 7 , wherein a content of the olefin-based crystalline resin (d) is 10 to 100 parts by mass based on 100 parts by mass of the sum total of (a) the hydrogenated (A)-(B) block copolymer and/or a hydrogenated (A)-(B)-(A) block copolymer and (b) the hydrocarbon softening agent for rubber. 
     
     
         9 . The laminated molded article according to  claim 5 , wherein based on 100 % by mass of the sum total of (a) the hydrogenated (A)-(B) block copolymer and/or a hydrogenated (A)-(B)-(A) block copolymer and (b) the hydrocarbon softening agent for rubber; an occupying proportion of (a) is 20 to 80% by mass and an occupying proportion of (b) is 80 to 20% by mass. 
     
     
         10 . The laminated molded article according to  claim 6 , wherein based on 100 % by mass of the sum total of (a) the hydrogenated (A)-(B) block copolymer and/or a hydrogenated (A)-(B)-(A) block copolymer and (b) the hydrocarbon softening agent for rubber; an occupying proportion of (a) is 20 to 80% by mass and an occupying proportion of (b) is 80 to 20% by mass. 
     
     
         11 . The laminated molded article according to  claim 7 , wherein based on 100 % by mass of the sum total of (a) the hydrogenated (A)-(B) block copolymer and/or a hydrogenated (A)-(B)-(A) block copolymer and (b) the hydrocarbon softening agent for rubber; an occupying proportion of (a) is 20 to 80% by mass and an occupying proportion of (b) is 80 to 20% by mass. 
     
     
         12 . The laminated molded article according to  claim 8 , wherein based on 100 % by mass of the sum total of (a) the hydrogenated (A)-(B) block copolymer and/or a hydrogenated (A)-(B)-(A) block copolymer and (b) the hydrocarbon softening agent for rubber; an occupying proportion of (a) is 20 to 80% by mass and an occupying proportion of (b) is 80 to 20% by mass. 
     
     
         13 . The laminated molded article according to  claim 1 , wherein a concentration of an α,β-unsaturated carboxylic acid derived from the polymer modified by the α,β-unsaturated carboxylic acid in the thermoplastic elastomer is 0.01 to 10% by mass. 
     
     
         14 . The laminated molded article according to  claim 1 , wherein a sliding material layer is contained on the surface of the thermoplastic elastomer layer on an opposite side to the carbon fiber reinforced plastic. 
     
     
         15 . The laminated molded article according to  claim 1 , wherein the carbon fiber reinforced plastic comprises an epoxy resin. 
     
     
         16 . An automobile parts structure comprising the laminated molded article according to  claim 1 . 
     
     
         17 . A shipping parts structure comprising the laminated molded article according to  claim 1 . 
     
     
         18 . A power parts structure comprising the laminated molded article according to  claim 1 . 
     
     
         19 . A laminated molded article, comprising:
 a layer of a carbon fiber reinforced plastic; and   a thermoplastic elastomer layer comprising:   (a): a hydrogenated block copolymer which is a hydrogenated product of an (A)-(B) block copolymer and/or an (A)-(B)-(A) block copolymer composed of a vinyl aromatic compound polymer block (A) and a conjugated diene polymer block (B) exclusive of isoprene alone, wherein at least 80% of double bonds of the conjugated diene moiety of the conjugated diene polymer block (B) is saturated through hydrogenation, and a weight average molecular weight of (a) the hydrogenated (A)-(B) block copolymer and/or a hydrogenated (A)-(B)-(A) block copolymer is from 80,000 to 1,000,000;   (b): a hydrocarbon softening agent for rubber;   (c): a hydrogenated block copolymer composed of an (A)-(C)-(A) triblock copolymer which is composed of a vinyl aromatic compound polymer block (A) and a conjugated diene polymer block (C), wherein the conjugated diene polymer block (C) is constituted of isoprene, and a part or all of carbon-carbon double bonds based on isoprene are hydrogenated; and   (d): a polymer modified by an a,β-unsaturated carboxylic acid;   wherein a concentration of the α,β-unsaturated carboxylic acid derived from the polymer modified by the α,β-unsaturated carboxylic acid is 0.01 to 10% by mass.   
     
     
         20 . A method for bonding of a carbon reinforced plastic layer to a base material, comprising:
 laminating a thermoplastic elastomer layer to a layer of a carbon fiber reinforced plastic; and   bonding the thermoplastic elastomer layer to a base material;   wherein   the thermoplastic elastomer layer comprises:   (a): a hydrogenated block copolymer which is a hydrogenated product of an (A)-(B) block copolymer and/or an (A)-(B)-(A) block copolymer composed of a vinyl aromatic compound polymer block (A) and a conjugated diene polymer block (B) exclusive of isoprene alone, wherein at least 80% of double bonds of the conjugated diene moiety of the conjugated diene polymer block (B) is saturated through hydrogenation, and a weight average molecular weight of (a) the hydrogenated (A)-(B) block copolymer and/or a hydrogenated (A)-(B)-(A) block copolymer is from 80,000 to 1,000,000;   (b): a hydrocarbon softening agent for rubber;   (c): a hydrogenated block copolymer composed of an (A)-(C)-(A) triblock copolymer which is composed of a vinyl aromatic compound polymer block (A) and a conjugated diene polymer block (C), wherein the conjugated diene polymer block (C) is constituted of isoprene, and a part or all of carbon-carbon double bonds based on isoprene are hydrogenated; and   (d): a polymer modified by an α,β-unsaturated carboxylic acid;   wherein a concentration of the α,β-unsaturated carboxylic acid derived from the polymer modified by the α,β-unsaturated carboxylic acid is 0.01 to 10% by mass.