The present invention relates to an adhesive composition for optical use, which is applied to optical devices or display devices and thus may exhibit excellent adhesion performance while exhibiting a high barrier performance based on a low water vapor transmission rate, and may implement both excellent optical characteristics and durability, and specifically, provides an adhesive composition for optical use, the adhesive composition including: a thermally curable rubber including an isobutylene-isoprene rubber having a carboxyl group and an isobutylene-isoprene rubber having a hydroxy group; and a thermal crosslinking agent. Further, the present invention provides an adhesive film for optical use, including an adhesive layer including photocured products of the adhesive composition for optical use.

Two-component adhesion composition suitable for extrusion coating paper substrates which comprises: a) from 70 to 98 wt % of high melt strength polypropylene (A) with a branching index g of 0.9 or less; and b) from 2 to 30 wt % of a component (B) selected from the group consisting of: (i) maleic anhydride-modified polypropylene (MAPP); (ii) maleic anhydride-modified polypropylene wax; (iii) polypropylene homopolymer with high melt flow rate; or (iv) ethylene-vinyl acetate-based hot melt adhesive,
and its use.

Two-component adhesion composition suitable for extrusion coating paper substrates which comprises: a) from 70 to 98 wt % of high melt strength polypropylene (A) with a branching index g of 0.9 or less; and b) from 2 to 30 wt % of a component (B) selected from the group consisting of: (i) maleic anhydride-modified polypropylene (MAPP); (ii) maleic anhydride-modified polypropylene wax; (iii) polypropylene homopolymer with high melt flow rate; or (iv) ethylene-vinyl acetate-based hot melt adhesive,
and its use.

The present invention provides an adhesive composition that shows good adhesion to a polyolefin resin substrate and a metal substrate, and good electrolyte solution resistance, and also exhibits excellent heat resistance. The present invention also provides a laminate including an adhesive layer comprising the adhesive composition, a packaging material using the laminate for which heat resistance and electrolyte solution resistance are required, and a packaging material for a lithium-ion battery comprising the laminate as a constituent member. The adhesive composition comprises an acid-modified polyolefin (A), an isocyanate curing agent (B), and an acid anhydride group-containing compound (C), the acid anhydride group-containing compound (C) being present in an amount of 0.1 parts by mass or more and 20 parts by mass or less based on 100 parts by mass of the acid-modified polyolefin (A).

The present invention provides an adhesive composition that shows good adhesion to a polyolefin resin substrate and a metal substrate, and good electrolyte solution resistance, and also exhibits excellent heat resistance. The present invention also provides a laminate including an adhesive layer comprising the adhesive composition, a packaging material using the laminate for which heat resistance and electrolyte solution resistance are required, and a packaging material for a lithium-ion battery comprising the laminate as a constituent member. The adhesive composition comprises an acid-modified polyolefin (A), an isocyanate curing agent (B), and an acid anhydride group-containing compound (C), the acid anhydride group-containing compound (C) being present in an amount of 0.1 parts by mass or more and 20 parts by mass or less based on 100 parts by mass of the acid-modified polyolefin (A).

Disclosed are a hot melt adhesive for pole piece edge protection, a preparation method thereof and a protection method thereof, the hot melt adhesive includes 30-60% of polyolefin resin, 20-40% of tackifying resin, 5%-25% of wax, 2-10% of mineral oil and 0-20% of functional filler, the polyolefin resin is compounded by a first polyolefin group and a second polyolefin group in a mass ratio of (2-8):1; the first polyolefin group includes modified polypropylene with a density lower than 0.9 g/cm.sup.3 and a melt flow rate of 4-10 g/10 min; the second polyolefin group includes at least one of polyethylene, a copolymer of ethylene and C.sub.4-C.sub.10 -olefin, amorphous poly--olefin, acid or anhydride-modified polyolefin, and a polyolefin elastomer; and the hot melt adhesive has a softening point above 100 C., a melt viscosity below 5000 cps, and surface drying time less than 5 min.

Disclosed are a hot melt adhesive for pole piece edge protection, a preparation method thereof and a protection method thereof, the hot melt adhesive includes 30-60% of polyolefin resin, 20-40% of tackifying resin, 5%-25% of wax, 2-10% of mineral oil and 0-20% of functional filler, the polyolefin resin is compounded by a first polyolefin group and a second polyolefin group in a mass ratio of (2-8):1; the first polyolefin group includes modified polypropylene with a density lower than 0.9 g/cm.sup.3 and a melt flow rate of 4-10 g/10 min; the second polyolefin group includes at least one of polyethylene, a copolymer of ethylene and C.sub.4-C.sub.10 -olefin, amorphous poly--olefin, acid or anhydride-modified polyolefin, and a polyolefin elastomer; and the hot melt adhesive has a softening point above 100 C., a melt viscosity below 5000 cps, and surface drying time less than 5 min.