Patent ID: 8236412
Filing Date: 2012-08-07
Classification: B32B,C08G,H01L,Y02E,Y10T

Abstract:
1. A film having a thickness of 500 μm and a transmission of greater than or equal to 80% at a wavelength ranging from 400 to 700 nm and/or the degree of haze less than or equal to 10%, comprising a polyamide-grafted polymer, said polyamide-grafted polymer comprising a polyolefin backbone that is an ethylene/alkyl (meth)acrylate copolymer containing a residue of at least one unsaturated monomer (X) and at least one polyamide graft in which: said polyamide graft is attached to the polyolefin backbone by the residue of the unsaturated monomer (X) that comprises a functional group capable of reacting via condensation reaction with a polyamide having at least one amine end group and/or at least one carboxylic acid end group; the residue of the unsaturated monomer (X) is attached to the backbone by grafting or copolymerization, said polyamide-grafted polymer comprising: from 50 to 95% by weight of the polyolefin backbone comprising the unsaturated monomer (X); and from 5 to 50% by weight of the polyamide grafts, and the flow temperature of said polyamide-grafted polymer being greater than or equal to 75% C, this flow temperature being defined as the highest temperature among the melting points (T m ) and the glass transition temperatures (T g ) of the polyamide graft and of the polyolefin backbone, said composition optionally containing less than 20% by weight of tackifying resin relative to the total weight of the composition, wherein the unsaturated monomer (X) is maleic anhydride.