Adhesive resin composition and film
An adhesive resin composition, including from 60 to 95 parts by mass of an ethylenic polymer (A) including a modified ethylenic polymer (a-2) obtained by modifying at least one polymer (a-1) selected from the group consisting of an ethylene homopolymer and a copolymer of ethylene and at least one α-olefin selected from α-olefins having from 3 to 20 carbon atoms, with an unsaturated carboxylic acid and/or a derivative thereof, and from 5 to 40 parts by mass of a butene-based polymer (B) having 80 mol % or more of a structural unit derived from 1-butene, provided that the total content of the polymer (A) and the polymer (B) is 100 parts by mass, wherein the MER (190° C. and a load of 2.16 kg) is from 1 to 20 g/10 minutes.
1 . An adhesive resin composition, comprising:
from 60 to 95 parts by mass of an ethylenic polymer (A) comprising a modified ethylenic polymer (a-2) obtained by modifying at least one polymer (a-1) selected from the group consisting of an ethylene homopolymer and a copolymer of ethylene and at least one α-olefin selected from α-olefins having from 3 to 20 carbon atoms, with an unsaturated carboxylic acid and/or a derivative thereof; and
from 5 to 40 parts by mass of a butene-based polymer (B) having 80 mol % or more of a structural unit derived from 1-butene, provided that the total content of the polymer (A) and the polymer (B) is 100 parts by mass,
wherein the adhesive resin composition has a melt flow rate as measured at 190° C. and under a load of 2.16 kg in accordance with ASTM D1238 is in a range of from 1 to 20 g/10 minutes,
wherein the butene-based polymer (B) is a copolymer of 1-butene and α-olefin(s) selected from the group consisting of ethylene and propylene.
2 . The adhesive resin composition according to claim 1 , wherein the melt flow rate of the ethylenic polymer (A), measured at 190° C. and under a load of 2.16 kg in accordance with ASTM D 1238 is from 0.1 to 10 g/10 minutes.
3 . The adhesive resin composition according to claim 1 , wherein the unsaturated carboxylic acid and/or a derivative thereof is maleic anhydride.
4 . The adhesive resin composition according to claim 1 , wherein the adhesive resin composition has a content of structures derived from the unsaturated carboxylic acid and/or the derivative thereof in the adhesive resin composition is from 0.05 to 1% by mass, wherein the unsaturated carboxylic acid and/or the derivative thereof is formed of maleic anhydride.
5 . A monolayer or multilayer film comprising at least one layer comprising the adhesive resin composition according to claim 1 .
6 . The monolayer or multilayer film according to claim 5 , wherein the monolayer or multilayer film is a component of a packaging film for batteries.
7 . The monolayer or multilayer film according to claim 5 , wherein the monolayer or multilayer film is a component of an electrode sealing material for lithium ion batteries.