Patent ID: 11926967
Assignee: SUN CHEMICAL CORPORATION
Field: Basic materials chemistry (Chemistry)
Classification: CPC D  C  Y | IPC C  D

Claim 0:
1. A water-based coating composition, comprising:
a) one or more polymer binders, in an amount of 35 wt % to 95 wt %, on a solids weight basis; and
b) one or more particles, in an amount of 0.1 wt % to 50 wt %, on a solids weight basis;
wherein at least one of the one or more polymer binders has a glass transition temperature (Tg) of less than 10° C.;
wherein at least one of the one or more polymer binders has a heat seal onset temperature of less than 200° C.;
wherein at least one of the one or more particles comprise one or more talc particles having a mean particle size of 10 to 100 μm;
wherein the water-based coating composition, when dried on a substrate, forms a 1 inch wide, coating-to-coating heat seal with a sealing strength above 400 gf/in; and
wherein the coating-to-coating heat seal with a sealing strength above 400 gf/in. is formed by heating the coating, when dried on a substrate, at 160° C. (320° F.) and 40 psi for 1 sec, or 121° C. and 50 psi for 3 sec;
wherein the water-based coating composition comprises a solids content of 30 wt % to 70 wt %.