Adhesive resin composition and film
An adhesive resin composition, including 50 to 89.9 parts by mass of a propylene-based polymer (A) satisfying the following (a1) and (a2), 0.1 to 20 parts by mass of a modified polyolefin (B), and 10 to 30 parts by mass of an ethylenic polymer (C) satisfying the following (c1) to (c3) (the sum of (A), (B) and (C) is 100 parts by mass). (a1) The propylene polymer (A) includes a propylene-based polymer (a-1) with the melting point ≥120° C. and a propylene-based polymer (a-2) with the melting point <120° C. (a2) The proportion of the (a-1) in the (A) is 50 to 70.0% by mass. (c1) The ethylenic polymer (C) includes an ethylene homopolymer (c-1) and an ethylene ⋅α-olefin copolymer (c-2). (c2) MFR=0.1 to 10 g/10 minutes. (c3) The proportion of the copolymer (c-1) in the (C) is 40 to 100% by mass.
1 . An adhesive resin composition, comprising
50 to 89.9 parts by mass of a propylene-based polymer (A) satisfying the following (al) and (a2),
0.1 to 20 parts by mass of a modified polyolefin (B) obtained by modifying a polyolefin (b) with an unsaturated carboxylic acid and/or a derivative thereof, and
10 to 30 parts by mass of an ethylenic polymer (C) satisfying the following (c1) to (c3), provided that the sum of (A), (B) and (C) is 100 parts by mass:
(a1) the propylene polymer (A) comprises a propylene-based polymer (a-1) having a first melting point (Tm) of 120° C. or higher observed in differential scanning calorimetry, and a propylene-based polymer (a-2) having a second melting point (Tm) of lower than 120° C. observed or having no melting point observed in differential scanning calorimetry,
(a2) a proportion of the propylene-based polymer (a-1) in the propylene-based polymer (A) is 50 to 70.0% by mass,
(c1) the ethylenic polymer (C) comprises a copolymer (c-1) of ethylene and at least one α-olefin selected from α-olefins having 3 to 20 carbon atoms, and optionally an ethylene homopolymer (c-2),
(c2) a melt flow rate measured at 190° C. under a load of 2.16 kg in accordance with ASTM D1238 is 0.1 to 10 g/10 minutes, and
(c3) a proportion of the copolymer (c-1) in the ethylenic polymer (C) is 40 to 100% by mass,
wherein the adhesive resin composition has a melt flow rate measured at 230° C. under a load of 2.16 kg in accordance with ASTM D1238 of less than 7.0 g/10 minutes.
2 . The adhesive resin composition according to claim 1 , wherein the content of the ethylenic polymer (C) is 12.5 to 30 parts by mass.
3 . The adhesive resin composition according to claim 1 , wherein the melt flow rate (MFR) of the copolymer (c-1) as measured at 230° C. under a load of 2.16 kg load in accordance with ASTM D1238 is less than 6.0 g/10 minutes.
4 . The adhesive resin composition according to claim 1 , wherein the polyolefin (B) comprises 0.01 to 5% by mass of a structure derived from the unsaturated carboxylic acid and/or a derivative thereof in terms of a structure derived from maleic anhydride, and
the polyolefin (b) comprises 90 to 100 mol % of a structural unit derived from propylene.
5 . A monolayer or multilayer film comprising at least one layer comprising the adhesive resin composition according to claim 1 .
6 . A multilayer film comprising: at least one layer comprising the adhesive resin composition according to claim 1 ; and at least one further layer that is a layer other than the layer comprising the adhesive resin composition, wherein the layer comprising the adhesive resin composition is in contact with the further layer.
7 . A multilayer film comprising: at least one layer comprising the adhesive resin composition according to claim 1 ; and at least one layer selected from a metal-containing layer, a polyolefin layer, and a polar resin layer, wherein the layer comprising the adhesive resin composition is in contact with the layer selected from a metal-containing layer, a polyolefin layer, and a polar resin layer.
8 . The monolayer or multilayer film according to claim 5 , which is a film for battery packaging.
9 . The monolayer or multilayer film according to claim 5 , which is an electrode sealing material for lithium ion batteries.
10 . A method for producing a monolayer or multilayer film, comprising a step of melt extruding the adhesive resin composition according to claim 1 .