Patent ID: 7320825

Claim:
A multi layer composite having oil and grease resistance comprising: a) a paper or paperboard substrate, b) a base coat on a surface of said substrate comprising a first polymer selected from the group consisting of film forming natural and synthetic polymers in the substantial absence of a mineral pigment filler, and c) a top coat on a surface of said base coat, said top coat comprising a continuous polymer phase comprising one or more film forming synthetic polymers having dispersed therein a mixture of at least one platy mineral pigment and at least one non-platy mineral pigment; Said composite exhibits an oil and grease resistance equal to or less than about 4 as measured by “TAPPI-454 Turpentine Test for Grease Resistance of Paper”, in which turpentine is replaced by Crisco Pure Vegetable Oil run at a temperature of 140° F. for 24 hours at TAPPI conditions.