ADHESIVE RESIN COMPOSITION AND LAYERED BODY
An aspect of the present invention resides in an adhesive resin composition including a propylene polymer (A), an ethylene polymer (B), and a thermoplastic resin (C) including a copolymer containing not less than 60 mol% and not more than 99 mol% of structural units derived from 4-methyl-1-pentene,...
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Format: | Patent |
Sprache: | eng ; fre ; ger |
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Zusammenfassung: | An aspect of the present invention resides in an adhesive resin composition including a propylene polymer (A), an ethylene polymer (B), and a thermoplastic resin (C) including a copolymer containing not less than 60 mol% and not more than 99 mol% of structural units derived from 4-methyl-1-pentene, and not less than 1 mol% and not more than 40 mol% of structural units derived from a C2-C20 α-olefin other than 4-methyl-1-pentene, the structural units derived from 4-methyl-1-pentene and the structural units derived from a C2-C20 α-olefin other than 4-methyl-1-pentene representing in total 100 mol% of the copolymer, the thermoplastic resin (C) showing a melting point Tm of not more than 199°C or showing substantially no melting point as analyzed with a differential scanning calorimeter (DSC). In the resin composition, the total of the components (A), (B) and (C) taken as 100 parts by mass includes 45 to 75 parts by mass of the component (A), 5 to 20 parts by mass of the component (B), and 15 to 45 parts by mass of the component (C). The adhesive resin composition of the present invention can favorably bond a polymethylpentene resin together with a polar resin such as an ethylene-vinyl alcohol copolymer resin or a polyamide resin, or together with a polyolefin resin such as a polypropylene resin, and can maintain good adhesion between the resins even after stretching or other treatment is performed. A laminate of the present invention includes a polymethylpentene resin layer and a polar resin layer such as of an ethylene-vinyl alcohol copolymer resin or a polyamide resin, or a polyolefin resin layer such as a polypropylene resin layer, and has good adhesion between the layers and maintains the good adhesion between the layers even after being subjected to stretching or other treatment. |
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