Coating compositions comprising alkyl ketene dimers and alkyl succinic anhydides for use in paper making

Abstract

Additives for paper making are disclosed herein. Specifically, the additives are wax-free alternatives to conventional coatings, including ASA, AKD and optionally an acrylic containing composition. Other additives may be included in the coating, such as cationic particles or compositions. The coatings may be used at a variety of points during the paper making process, including on the calender stack and in the wet end.

1 .- 19 . (canceled) 
     
     
         20 . A process for making paper comprising the following steps:
 (A) applying a furnish to a wire;   (B) dewatering the furnish and obtaining a water containing paper;   (C) pressing the water containing paper to reduce the water content;   (D) calendering the pressed paper;   (E) recovering a finished paper; and   (F) adding a coating, comprising an effective amount of at least one member selected from the group consisting of alkyl ketene dimer (AKD) and alkyl succinic anhydride (ASA) and optionally an acrylic acid containing composition.   
     
     
         21 . The process of  claim 20 , wherein the coating comprises an acrylic acid containing composition. 
     
     
         22 . The process of  claim 21 , wherein the coating further comprises a crosslinking agent in an amount effective to crosslink the acrylic acid containing composition. 
     
     
         23 . The process of  claim 21 , wherein the coating adding in step (G) further comprises a starch containing composition. 
     
     
         24 . The process of  claim 20 , wherein said coating is added more than once during said paper making process. 
     
     
         25 . The process of  claim 20 , wherein the mixture comprises a polymerizable cationic composition. 
     
     
         26 .- 27 . (canceled) 
     
     
         28 . The composition of claim  26 , further comprising a crosslinking agent in an amount sufficient to crosslink the acrylic acid containing composition. 
     
     
         29 .- 30 . (canceled) 
     
     
         31 . The process of claim  26 , wherein the mixture comprises a polymerizable cationic composition. 
     
     
         32 . A process of making a coated paper or kraft stock comprising the steps of:
 providing a paper or kraft stock;   applying an aqueous resin coating composition as a coating to said paper or stock in an amount in excess of the desired amount of coating;   said aqueous coating composition comprising at least one member selected from the group consisting of alkyl ketene dimer (AKD) and alkyl succinic anhydride (ASA) and optionally an acrylic acid containing composition;   metering and removing unwanted coating material from said paper or stock coated with said excess amount of coating material by directing a flow of fluid against said coating;   solidfying the coating on Said paper or stock; and   obtaining a coated paper or kraft stock.   
     
     
         33 . The process of  claim 31 , where the aqueous coating composition further comprises a starch containing composition. 
     
     
         34 . The process of  claim 31 , wherein said aqueous composition comprises an acrylic acid containing composition. 
     
     
         35 . The process of  claim 33 , wherein said aqueous composition further comprises a crosslinking agent in an amount sufficient to crosslink the acrylic acid containing composition. 
     
     
         36 . The process of  claim 32 , wherein the fluid is a directed stream of air. 
     
     
         37 . The process of  claim 32 , wherein the unwanted coating material is recovered and at least some of the recovered material is remixed and applied to said paper or stock. 
     
     
         38 . The process of  claim 32 , wherein the coating comprises a polymerizable cationic composition. 
     
     
         39 .- 40 . (canceled) 
     
     
         41 . The process of  claim 20 , wherein the acrylic and coating composition comprises melting methacrylate.