Adhesive composition and anisotropic conductive film using the same
An adhesive composition includes an ethylene-vinyl acetate copolymer, a copolymer of an aliphatic heterocyclic compound and a monomer having an aromatic ring, a binder resin, a radical polymerizable material, and a radical initiator.
1. An adhesive composition, comprising:
about 10 to about 40% by weight of an ethylene-vinyl acetate copolymer;
about 5 to about 20% by weight of a copolymer of maleimide and styrene;
about 1 to about 20% by weight of a binder resin;
about 30 to about 60% by weight of a radical polymerizable material; and
about 0.5 to about 5% by weight of a radical initiator.
2. An anisotropic conductive film produced using the composition as claimed in claim 1 .
3. The composition as claimed in claim 1 , further comprising conductive particles.
4. The composition as claimed in claim 3 , wherein the conductive particles are present in an amount of about 0.01 to about 3% by weight.
5. The composition as claimed in claim 1 , further comprising about 0.1 to about 5% by weight of a coupling agent.
6. The composition as claimed in claim 1 , further comprising about 0.05 to about 0.5% by weight of an additive including at least one of a polymerization inhibitor, an antioxidant, and a heat stabilizer.
7. The composition as claimed in claim 1 , wherein the ethylene-vinyl acetate copolymer contains vinyl acetate units in an amount of about 20 to about 80% by weight, based on the total weight of the ethylene-vinyl acetate copolymer.
8. An adhesive composition, comprising:
an ethylene-vinyl acetate copolymer;
a copolymer of maleimide and styrene;
a binder resin;
a radical polymerizable material;
a radical initiator;
conductive particles; and
a coupling agent.
9. The composition as claimed in claim 1 , wherein the copolymer of maleimide and styrene has a styrene content of about 50% or greater, based on the total weight of the copolymer.
10. The composition as claimed in claim 1 , wherein the binder resin has a weight average molecular weight of about 10,000 to about 1,000,000 and includes at least one of a polyvinyl butyral resin, a polyvinyl formal resin, a polyester resin, a phenolic resin, an epoxy resin, a phenoxy resin, a urethane resin, and an acrylic resin.
11. The composition as claimed in claim 1 , wherein the radical polymerizable material includes at least one of an acrylate, a methacrylate, a maleimide compound, and a compound having a phosphate ester structure.
12. The composition as claimed in claim 1 , wherein the radical initiator includes at least one of a photopolymerization initiator and a heat curing initiator.