Strength additives for tissue products

Abstract

A paper product having improved strength properties as disclosed. In accordance with the present invention, the paper product is treated with a strength agent comprising a derivatized polyethylene oxide. The paper product can be, for instance, a facial tissue, a bath tissue, a paper towel or the like.

1 - 47 . (canceled)  
   
   
       48 . A papermaking chemical suitable for tissue making capable of increasing the dry and/or wet strength of the tissue product while simultaneously providing for a reduced coefficient of friction of the tissue sheet when used in the wet state.  
   
   
       49 . The papermaking chemical of  claim 48  wherein the static coefficient of friction in the wet state is no more than 10% greater than the static coefficient of friction in the wet state.  
   
   
       50 . The papermaking chemical of  claim 48  wherein the kinetic coefficient of friction in the wet state is no more than 20% greater than the kinetic coefficient of friction in the dry state.  
   
   
       51 . The papermaking chemical of  claim 48  wherein the papermaking chemical comprises a derivatized polyethylene oxide.  
   
   
       52 . The papermaking chemical of  claim 51  wherein the derivatized polyethylene oxide comprises:  
     
       
         
         
             
             
         
       
     
     wherein R 1 , R 1′ , R 1″  are independently H or a C 1-4  alkyl; 
 Z is any bridging radical whose purpose is to incorporate the R 0  moiety into the ethylenically unsaturated monomer;  
 R 0  is any group capable of or containing a constituent capable of forming covalent, ionic and/or hydrogen bonds with cellulose or with the polymer itself;  
 R 2′  and R 2″  are any suitable polyoxyethylene endgroups selected from the group of H, alkyl, aryl, alkyl esters, alkyl amides, sulfonates, substituted derivatives and mixtures thereof;  
 p is an integer greater than or equal to about 350; and  
 m and n are integers such that m+n=p.  
 
   
   
       53 . The paper product of  claim 52 , wherein Z is selected from the group comprising —O—, —S—, —OOC—, —COO—, —NHCO—, —CONH and mixtures thereof and R o  is selected from the group comprising hydrogen, amine, amide, carboxyl, hydroxyl, aldehyde, epoxy, silanol, azetidinium and mixtures thereof.  
   
   
       54 . The papermaking chemical of  claim 51 , wherein the derivatized polyethylene oxide comprises a silanol derivatized polyethylene oxide.  
   
   
       55 . The papermaking chemical of  claim 51 , wherein the derivatized polyethylene oxide comprises:  
     
       
         
         
             
             
         
       
     
     wherein R 1 , R 1′ , R 1″  are independently H or a C 1-4  alkyl; 
 R 2′  and R 2″  are any suitable polyoxyethylene endgroups selected from the group of H, alkyl, aryl, alkyl esters, alkyl amides, sulfonates, substituted derivatives and mixtures thereof; and  
 m and n are integers such that m+n is greater than or equal to 350.  
 
   
   
       56 . The papermaking chemical of  claim 51 , wherein the derivatized polyethylene oxide comprises a glyoxylated derivatized polyethylene oxide.  
   
   
       57 . The papermaking chemical of  claim 55 , wherein the derivatized polyethylene oxide comprises:  
     
       
         
         
             
             
         
       
     
     wherein R 1 , R 1′  and R 1″  are independently H or a C 1  to C 4  alkyl group; 
 R 2′  and R 2″  are any suitable polyoxyethylene endgroups selected from the group of H, alkyl, aryl, alkyl esters, alkyl amides, sulfonates, substituted derivatives and mixtures thereof; and  
 m and n are integers such that m+n is greater than or equal to 350.