Patent ID: 9227381
Filing Date: 2016-01-05
CPC Classification: B05D,B32B,C08J,C08K,C09D,Y10T

Claim Text:
1. A multilayer barrier film having water vapor and oxygen transmission resistant properties, the multilayer barrier film comprising (1) a polymeric base layer, and (2) a barrier layer in direct contact with one side of the base layer, the barrier layer comprising a dispersion of organic polymers in which the dispersion of organic polymers consists of (i) about 1-98.5 wt. % of polyvinyl butyral, and (ii) a complementary amount to total 100 wt. % of a water soluble organic polymer selected from the group consisting of polyvinyl alcohol, ethylene-vinyl alcohol copolymer and a mixture thereof, in which the polyvinyl butyral is present in discrete particles of fine particle size dispersed uniformly throughout a continuous matrix of the water soluble organic polymer, and in which at least one of the polyvinyl butyral and the water soluble organic polymer is substantially completely crosslinked by a crosslinking agent.