Reactive compositions and their use in paper products

Abstract

A paper product is provided that contains at least one paper web that is applied with a reactive composition. The reactive composition, for example, can contain one or more softening moieties that are capable of debonding hydrogen bonds within a paper web, thereby softening the web. In addition, the reactive composition contains a moiety that can form both a covalent bond and ionic bond with certain groups present on cellulosic fibers. For example, in one embodiment, the moiety contains a positively charged atom that can form an ionic bond with a carboxyl group present on a first cellulosic fiber. In addition, the moiety can contain a pendant hydroxyl group that can form a covalent bond with a carboxyl group present on a second cellulosic fiber.

What is claimed is:  
     
         1 . A paper product comprising at least one paper web containing cellulosic fibers and a reactive composition applied to said paper web, said reactive composition having the following structure:  
       
         
           
           
               
               
           
         
       
       wherein, 
 a, b, c>0;  
 n≧1;  
 R 1  and R 2  are monomers, homopolymers, or block or graft interpolymers that are capable of degrading interfiber hydrogen bonds contained within said paper web; and  
 Q 1  is a monomer, homopolymer, or block or graft interpolymer that contains: 
 i) a charged group that is capable of forming an ionic bond with a charged group present on a first cellulosic fiber; and  
 ii) a pendant functional group that is capable of forming a covalent bond with a free reactive group present on a second cellulosic fiber.  
 
 
     
     
         2 . A paper product as defined in  claim 1 , wherein said charged group of said reactive composition contains a positively charged atom.  
     
     
         3 . A paper product as defined in  claim 2 , wherein said positively charged atom is nitrogen.  
     
     
         4 . A paper product as defined in  claim 1 , wherein at least one of the R 1  and R 2  groups include a moiety selected from the group consisting of a polysiloxane, an aliphatic hydrocarbon, an amphiphilic hydrocarbon, and combinations thereof.  
     
     
         5 . A paper product as defined in  claim 1 , wherein at least one of the R 1  and R 2  groups contain a C 8  or higher aliphatic hydrocarbon moiety.  
     
     
         6 . A paper product as defined in  claim 1 , wherein R 1  is of the form R 1 -Z 1 , wherein Z 1  is a bridging radical.  
     
     
         7 . A paper product as defined in  claim 6 , wherein Z 1  is selected from the group consisting of —CH 2 —, —COO—, —CONR—, —O—, —S—, —OSO 2 O—, —CONHCO—, —CONHCHOHCHOO—, and combinations thereof.  
     
     
         8 . A paper product as defined in  claim 1 , wherein R 2  is of the form R 2 -Z 2 , wherein Z 2  is a bridging radical.  
     
     
         9 . A paper product as defined in  claim 8 , wherein Z 2  is selected from the group consisting of —CH 2 —, —COO—, —CONR—, —O—, —S—, —OSO 2 O—, —CONHCO—, —CONHCHOHCHOO—, and combinations thereof.  
     
     
         10 . A paper product as defined in  claim 1 , wherein the pendant functional group of the Q 1  moiety is provided by a group selected from epoxides, anhydrides, azetidiniums, or aldehydes.  
     
     
         11 . A paper product as defined in  claim 1 , wherein the Q 1  moiety is an azetidinium ring having the following structure:  
       
         
           
           
               
               
           
         
       
     
     
         12 . A paper product as defined in  claim 1 , wherein the free reactive group contained one of said cellulosic fibers is selected from the group consisting of carboxyl groups, aldehyde groups, primary or secondary amines, and combinations thereof.  
     
     
         13 . A paper product as defined in  claim 1 , wherein said paper web contains multiple layers.  
     
     
         14 . A paper product as defined in  claim 13 , wherein said first cellulosic fiber is present within one of said layers and said second cellulosic fiber is present within another of said layers.  
     
     
         15 . A paper product as defined in  claim 1 , further comprising at least one other paper web to form a multi-ply paper product.  
     
     
         16 . A paper product as defined in  claim 15 , wherein said first cellulosic fiber is present within one of paper webs and said second cellulosic fiber is present within another of said paper webs.  
     
     
         17 . A paper product comprising at least one paper web containing cellulosic fibers and a reactive composition applied to said paper web, said reactive composition having the following structure:  
       
         
           
           
               
               
           
         
       
       wherein, 
 a, c>0;  
 b=1;  
 n≧1;  
 R 1  and R 2  include a moiety selected from the group consisting of a polysiloxane, an aliphatic hydrocarbon, an amphiphilic hydrocarbon, and combinations thereof, and wherein R 1  is of the form R 1 -Z 1  and R 2  is of the form R 2 -Z 2 , wherein Z 1  and Z 2  are bridging radicals; and  
 Q 1  is a monomer, homopolymer, or block or graft interpolymer that contains: 
 i) a positively charged atom that is capable of forming an ionic bond with a negatively charged group present on a first cellulosic fiber; and  
 ii) a pendant functional group that is capable of forming a covalent bond with a free reactive group present on a second cellulosic fiber.  
 
 
     
     
         18 . A paper product as defined in  claim 17 , wherein at least one of the R 1  and R 2  groups contain a C 8  or higher aliphatic hydrocarbon moiety.  
     
     
         19 . A paper product as defined in  claim 17 , wherein Z 1  and Z 2  are selected from the group consisting of —CH 2 —, —COO—, —CONR—, —O—, —S—, —OSO 2 O—, —CONHCO—, —CONHCHOHCHOO—, and combinations thereof.  
     
     
         20 . A paper product as defined in  claim 17 , wherein the pendant functional group of the Q 1  moiety is provided by a group selected from epoxides, anhydrides, azetidiniums, or aldehydes.  
     
     
         21 . A paper product as defined in  claim 17 , wherein the Q 1  moiety is an azetidinium ring having the following structure:  
       
         
           
           
               
               
           
         
       
     
     
         22 . A paper product as defined in  claim 17 , wherein said paper web contains multiple layers.  
     
     
         23 . A paper product as defined in  claim 22 , wherein said first cellulosic fiber is present within one of said layers and said second cellulosic fiber is present within another of said layers.  
     
     
         24 . A paper product as defined in  claim 17 , further comprising at least one other paper web to form a multi-ply paper product.  
     
     
         25 . A paper product as defined in  claim 24 , wherein said first cellulosic fiber is present within one of paper webs and said second cellulosic fiber is present within another of said paper webs.  
     
     
         26 . A method of forming a paper web comprising: 
 i) providing a furnish of cellulosic fibers;    ii) depositing the furnish onto a foraminous surface to form a paper web;    iii) applying a reactive composition to the furnish of cellulosic fibers, the paper web, or combinations thereof, said reactive composition having the following structure:                          wherein,    a, b, c>0;    n≧1;    R 1  and R 2  are monomers, homopolymers, or block or graft interpolymers that are capable of imparting a certain function to the paper web; and    Q 1  is a monomer, homopolymer, or block or graft interpolymer that contains: 
 a) a positively charged atom that is capable of forming an ionic bond with a negatively charged group present on a first cellulosic fiber of said paper web; and  
 b) a pendant functional group that is capable of forming a covalent bond with a free reactive group present on a second cellulosic fiber of said paper web; and  
   iv) thereafter, at least partially drying said paper web.    
     
     
         27 . A method as defined in  claim 26 , wherein at least one of the R 1  and R 2  groups include a moiety selected from the group consisting of a polysiloxane, an aliphatic hydrocarbon, an amphiphilic hydrocarbon, and combinations thereof.  
     
     
         28 . A method as defined in  claim 26 , wherein at least one of the R 1  and R 2  groups contain a C 8  or higher aliphatic hydrocarbon moiety.  
     
     
         29 . A method as defined in  claim 26 , wherein R 1  is of the form R 1 -Z 1 , wherein Z 1  is a bridging radical.  
     
     
         30 . A method as defined in  claim 29 , wherein Z 1  is selected from the group consisting of —CH 2 —, —COO—, —CONR—, —O—, —S—, —OSO 2 O—, —CONHCO—, —CONHCHOHCHOO—, and combinations thereof.  
     
     
         31 . A method as defined in  claim 26 , wherein R 2  is of the form R 2 -Z 2 , wherein Z 2  is a bridging radical.  
     
     
         32 . A method as defined in  claim 31 , wherein Z 2  is selected from the group consisting of —CH 2 —, —COO—, —CONR—, —O—, —S—, —OSO 2 O—, —CONHCO—, —CONHCHOHCHOO—, and combinations thereof.  
     
     
         33 . A method as defined in  claim 26 , wherein the pendant functional group of the Q 1  moiety is provided by a group selected from epoxides, anhydrides, azetidiniums, or aldehydes.  
     
     
         34 . A method as defined in  claim 26 , wherein the Q 1  moiety is an azetidinium ring having the following structure:  
       
         
           
           
               
               
           
         
       
     
     
         35 . A method as defined in  claim 26 , wherein said paper web contains multiple layers.  
     
     
         36 . A method as defined in  claim 35 , wherein said first cellulosic fiber is present within one of said layers and said second cellulosic fiber is present within another of said layers.  
     
     
         37 . A method as defined in  claim 26 , wherein said reactive composition is applied to said furnish of cellulosic fibers.  
     
     
         38 . A method as defined in  claim 26 , wherein said reactive composition is applied to said paper web.