Embodiments of the present application provides a composite film and a method for the preparation thereof, a battery module, a battery pack, and an electrical device. The method of preparing a composite film includes activating a surface of a polymer film by grafting the polymer film with a polar group on the surface, wherein the polymer film is selected from a polyolefin film or a polyethylene-vinyl acetate film; applying a slurry comprising a modified polymer resin grafted with a polar group to the activated surface of the polymer film to form a slurry coat, wherein the modified polymer resin is selected from a modified polyolefin resin grafted with a polar group or a modified polyethylene-vinyl acetate grafted with a polar group; and heating the slurry coat and the polymer film to transform the slurry coat into a modified polymer resin solid film, thereby obtaining the composite film.

Embodiments of the present application provides a composite film and a method for the preparation thereof, a battery module, a battery pack, and an electrical device. The method of preparing a composite film includes activating a surface of a polymer film by grafting the polymer film with a polar group on the surface, wherein the polymer film is selected from a polyolefin film or a polyethylene-vinyl acetate film; applying a slurry comprising a modified polymer resin grafted with a polar group to the activated surface of the polymer film to form a slurry coat, wherein the modified polymer resin is selected from a modified polyolefin resin grafted with a polar group or a modified polyethylene-vinyl acetate grafted with a polar group; and heating the slurry coat and the polymer film to transform the slurry coat into a modified polymer resin solid film, thereby obtaining the composite film.

Polymeric compositions obtainable by free-radical polymerization of at least two different alkyl (meth)acrylates in the presence of at least one ethylene-vinyl ester copolymer, the alkyl (meth)acrylates used being a mixture comprising alkyl (meth)acrylates having linear C.sub.12- to C.sub.60-alkyl radicals and different alkyl (meth)acrylates having linear C.sub.1- to C.sub.11-alkyl radicals and/or branched C.sub.4- to C.sub.60-alkyl radicals and/or cyclic C.sub.5- to C.sub.20-alkyl radicals. The use of such polymeric compositions as pour point depressants for crude oils, mineral oils or mineral oil products.

Polymeric compositions obtainable by free-radical polymerization of at least two different alkyl (meth)acrylates in the presence of at least one ethylene-vinyl ester copolymer, the alkyl (meth)acrylates used being a mixture comprising alkyl (meth)acrylates having linear C.sub.12- to C.sub.60-alkyl radicals and different alkyl (meth)acrylates having linear C.sub.1- to C.sub.11-alkyl radicals and/or branched C.sub.4- to C.sub.60-alkyl radicals and/or cyclic C.sub.5- to C.sub.20-alkyl radicals. The use of such polymeric compositions as pour point depressants for crude oils, mineral oils or mineral oil products.

An electrode material, electrode, battery and method for forming the electrode material are provided. The electrode material includes an active particle and a cladding layer partially or completely covering the surface of the active particle. The cladding layer includes 5 to 70 parts by weight of a conductive additive and 30 to 95 parts by weight of a first polymer, wherein the total weight of the first polymer and the conductive additive is 100 parts by weight. The first polymer is a product of a compound having two acrylate groups and an ethylene-vinyl acetate copolymer via a polymerization. The compound having two acrylate groups has the structure as represented by Formula (I)

##STR00001##

wherein A.sup.1, R.sup.1 and R.sup.2 are disclosed in the specification.

The present disclosure provides a crosslinkable polymer composition. In an embodiment, the crosslinkable polymer composition includes a polar ethylene-based polymer, a free radical initiator, and 2,2,6,6-tetramethyl-4-piperidyl methacrylate disulfide (BiTEMPS methacrylate). The present disclosure provides a crosslinked composition. In an embodiment, the crosslinked composition includes a polar ethylene-based polymer; and 2,2,6,6-tetramethyl-4-piperidyl methacrylate disulfide (BiTEMPS methacrylate).

The present invention provides a rubber composition including, per 100 parts by mass of a rubber component (A), 1 to 100 parts by mass of a polyolefin (B) having a hydrolytically condensable silyl group in a molecule (however, except a high-density polyethylene having a density of 0.950 g/cm.sup.3 or higher) blended.