Coated substrate

Abstract

A substrate coated with a first coating composition comprising an alcohol-based binder and an inorganic particulate material and a second coating composition comprising a latex binder and a phyllosilicate, and methods for making said coated substrate.

1 . A substrate coated with:
 a first coating comprising an alcohol-based binder and an inorganic particulate material; and   a second coating comprising a latex binder and a phyllosilicate;   
     
     
         2 . The substrate according to  claim 1 , wherein the substrate is paper. 
     
     
         3 . The substrate according to  claim 1 , wherein the alcohol-based binder is polyvinyl alcohol. 
     
     
         4 . The substrate according to  claim 1 , wherein the inorganic particulate material comprises an alkaline earth metal carbonate or sulphate, an aluminosilicate, talc, perlite, diatomaceous earth, magnesium hydroxide, aluminum trihydrate or a combination thereof. 
     
     
         5 . The substrate according to  claim 1 , wherein the latex binder is a styrene butadiene binder. 
     
     
         6 . The substrate according to  claim 1 , wherein the phyllosilicate is selected from clays, kaolin, talc, mica, chlorite, pyrophyllite, serpentine and combinations thereof. 
     
     
         7 . The substrate according to  claim 1 , wherein the inorganic particulate material in the first coating has a shape factor equal to or greater than about 10. 
     
     
         8 . The substrate according to  claim 1 , wherein the inorganic particulate material and alcohol-based binder are present in the first coating in a weight ratio of from about 5:1 to about 1:10. 
     
     
         9 . The substrate according to  claim 1 , wherein the first coating has a coat weight equal to or less than about 30 gsm (g/m 2 ). 
     
     
         10 . The substrate according to  claim 1 , wherein the total coat weight of the first and second coatings is equal to or less than about 50 gsm (g/m 2 ). 
     
     
         11 . The substrate according to  claim 1 , wherein the substrate has a moisture vapour transmission rate (MVTR) equal to or less than about 200 gam (g/m 2 ) per day. 
     
     
         12 . (canceled) 
     
     
         13 . A method of coating a substrate comprising coating the substrate with a first coating composition and a second coating composition, wherein
 the first coating composition comprising an alcohol-based binder and an inorganic particulate material, and   the second coating composition comprises a latex binder and a phyllosilicate.   
     
     
         14 . The method of  claim 13 , wherein the first and second coating compositions are applied sequentially to the substrate. 
     
     
         15 . The method of  claim 13 , wherein the substrate comprises a first coating comprising an alcohol-based binder and an inorganic particulate material and a second coating comprising a latex binder and a phyllosilicate. 
     
     
         16 . The substrate according to  claim 1 , wherein the phyllosilicate and latex binder are present in the second coating in a weight ratio of from about 5:1 to about 1:10. 
     
     
         17 . The substrate according to  claim 1 , wherein the the phyllosilicate in the second coating has a shape factor equal to or greater than about 10. 
     
     
         18 . The substrate according to  claim 1 , wherein the second coating has a coat weight equal to or less than about 30 gam (g/m 2 ). 
     
     
         19 . The substrate according to  claim 4 , wherein the inorganic particulate material comprises calcium carbonate, magnesium carbonate, dolomite, or gypsum. 
     
     
         20 . The substrate according to  claim 4 , wherein the inorganic particulate material comprises hydrous kandite clay, kaolin, halloysite clay, ball day, or anhydrous (calcined) kandite day comprising metakaolin, fully calcined kaolin, or mica. 
     
     
         21 . The substrate according to  claim 1 , wherein the substrate has an oil vapour transmission rate (OVTR) equal to or less than about 200 gsm (g/m 2 ) per day.