WATER BASED BARRIER COATING COMPRISING n-OSA MODIFIED STARCH

Abstract

Aqueous coating compositions for providing a grease resistant coating on fiber-based substrates are provided that comprise an n-OSA modified starch having an Mw of from about 500,000 to about 1,300,000 and a degree of substitution of from 0.002 to about 0.009, the n-OSA modified starch being present as from about 5 wt % to about 40 wt % of the total aqueous coating composition. The aqueous coating composition has a Brookfield viscosity at 30° C. at 100 rpm of from about 50 to about 2500 mPas; and the n-OSA modified starch is at least about 92% of any starch present in the aqueous coating composition. Methods of preparing the coating composition, fiber-based products comprising a coating of the coating composition, and methods of preparing these coated fiber-based product are also described.

Dependencies are inferred from the claim text.