Patent ID: 6077602
Filing Date: 2000-06-20
Classification: C08J,Y10T

Abstract:
A heat sealable polyolefin film comprising a polyolefin substrate having a first side and a second side, the first side having a polymeric coating I, comprising a polymerization product of:(i) about 25 wt. % to about 85 wt. % of a nitrile monomer having the formula: ##STR3## where R.sub.1 is hydrogen or methyl; (ii) about 15 wt. % to about 75 wt. % of at least one monomer selected from the group consisting of 1,3-butadiene and an alkyl acrylate having the structural formula: ##STR4## where R.sub.2 is hydrogen or an alkyl group containing from 1 to 4 carbon atoms and R.sub.3 is an alkyl group containing from 1 to 10 carbon atoms;(iii) about 1 wt. % to about 10 wt. % of at least one monomer selected from the group consisting of an alpha or beta ethylenically unsaturated carboxylic acid and sulfoethylmethacrylate;wherein the percent amounts of the monomers (i), (ii), and (iii) are based on the total weight of the polymerization product and said polymerization product has a calculated glass transition temperature of at least about 10.degree. C., the second side of the polyolefin substrate having a metal deposited thereon or a polymer coating II applied thereto, the polymer coating II comprising an acrylic coating composition, the polymer coating I being sealable to itself and to the polymer coating II at temperatures ranging from about 70.degree. C. to about 170.degree. C., wherein the polymer coating I and/or the polymer coating II further comprises substantially spherical particulates selected from the group consisting of silica and cross-linked polymonoalkylsiloxanes, said substantially spherical particulates being a blend of particulates having a mean particle diameter less than or equal to 50 nm and particulates having a mean particle diameter greater than or equal to 2 .mu.m.