US2013284386A1PendingUtilityA1

Deinking compositions and methods of use

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Assignee: WANG WINKLE ZHI HUIPriority: Sep 28, 2010Filed: Sep 28, 2010Published: Oct 31, 2013
Est. expirySep 28, 2030(~4.2 yrs left)· nominal 20-yr term from priority
Inventors:Winkle Zhi Hui WangJeff Jianhai MuMichael P. Gao
C09D 9/04D21C 9/08Y02W30/64D21C 5/02D21C 5/027D21C 9/00
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Claims

Abstract

Provided are surfactant compositions and their use for deinking various substrates, such as waste paper. The compositions comprise: (a) an alkyldiphenyloxide disulfonate compound of formula (I): wherein R 1 at each occurrence is independently C 6 -C 18 alkyl, M + is H + or a monovalent cation, p and q are independently 0 or 1 provided that at least one of p and q is 1; and (b) a nonionic surfactant of formula (II): wherein X and Y are independently ethylene oxide or propylene oxide, m and n are independently integers ranging from 0 to 50, provided that at least one of m and n is not 0, z is an integer ranging from 1 to 50, and R is R A or R A —C(═O)— wherein R A is C 4 -C 22 alkyl or C 4 -C 22 alkenyl.

Claims

exact text as granted — not AI-modified
1 . A composition comprising:
 (a) an alkyldiphenyloxide disulfonate compound of formula I:   
       
         
           
           
               
               
           
         
       
       wherein R 1  at each occurrence is independently C 6 -C 18  alkyl, M +  is H +  or a monovalent cation, p and q are independently 0 or 1 provided that at least one of p and q is 1; and
 (b) a nonionic surfactant of formula II: 
 
       
         
           
           
               
               
           
         
         wherein X and Y are independently ethylene oxide or propylene oxide, m and n are independently integers ranging from 0 to 50, provided that at least one of m and n is not 0, z is an integer ranging from 1 to 50, and R is R A  or R A —C(═O)— wherein R A  is C 4 -C 22  alkyl or C 4 -C 22  alkenyl. 
       
     
     
         2 . A composition according to  claim 1  wherein p is 0 and R 1  is C 12  alkyl or C 16  alkyl. 
     
     
         3 . A composition according to  claim 1  wherein X is ethylene oxide, Y is propylene oxide, m is 4-30, n is 12-30, and R A  is C 6 -C 20  alkyl or C 6 -C 20  alkenyl. 
     
     
         4 . A composition according to  claim 1  wherein X is ethylene oxide, m is 6-10, n is 0, R is R A , and R A  is C 10 -C 16  alkyl or C 10 -C 16  alkenyl. 
     
     
         5 . A composition according to  claim 1  wherein X is propylene oxide, Y is ethylene oxide, m is 1-4, n is 2-10, R is R A , and R A  is C 6 -C 18  alkyl or C 6 -C 18  alkenyl. 
     
     
         6 . A composition according to  claim 1  that is substantially free of free fatty acids. 
     
     
         7 . A method for deinking a substrate, the method comprising applying to the substrate a composition according to  claim 1 . 
     
     
         8 . A method according to  claim 7  wherein the substrate is paper, fabric, plastic, or cardboard. 
     
     
         9 . A substrate deinked with the composition of  claim 1 .

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