Pre-treatment liquor for preparing textile substrates for inkjet printing

Abstract

Aqueous pretreatment liquor for preparing a textile substrate for inkjet printing, comprising (A) one or more polycationic compounds, (B) one or more thickeners, (C) optionally customary additives, (C) water. Preferred polycationic compounds (A) are polymers or copolymers of diallyldialkylammonium monomers. Preferred thickeners are obtainable from (i) polyetherdiols, (ii) diisocyanates and (iii) compounds, R of the general formula R—OH, R—SH, R—NH 2 , RR NH or R—COOH, where R is a hydrophobic aliphatic or aromatic radical of at least 4 carbon atoms and R—OH may have been alkoxylated, and also further derivatives thereof that are capable of forming a urethane, thiourethane or urea bond, or from (i) polyetherdiols with (iv) compounds of the general formula R—OH or R—COOH, where R is a hydrophobic aliphatic or aromatic radical of at least 4 carbon atoms and R—OH may have been alkoxylated, and also further derivatives thereof that are capable of forming an ether or ester bond, and or from compounds (ii) and (iii).

1 - 10 . (canceled)  
     
     
         11 . An aqueous pretreatment liquor for preparing a textile substrate for inkjet printing, comprising: 
 (A) one or more polycationic compounds,    (B) one or more associative thickeners of the general formula (I), (II) and/or (III)      U-[-T-(M) y -] x -U  (I)  U-(M) y -U  (II)  U-T-U  (III)    where:    (M) y  is a unit derived from polyalkylene ether, M being an individual alkylene ether unit and y being from 1 to 100,000,    T is in each occurrence the same or different unit derived from a diisocyanate, x is on average from 1 to 500,    U is in each occurrence the same or different unit of at least 4 carbon atoms that is derived from aliphatic or aromatic alcohols, alkoxylated alcohols, thiols, amines or carboxylic acids,    (C) optionally customary additives,    (D) water.    
     
     
         12 . An aqueous pretreatment liquor as claimed in  claim 11 , wherein said polycationic compounds (A) are polymers or copolymers of diallyldialkylammonium monomers.  
     
     
         13 . An aqueous pretreatment liquor as claimed in  claim 12 , wherein said polycationic compounds (A) are a diallyldimethylammonium chloride homopolymer.  
     
     
         14 . An aqueous pretreatment liquor as claimed in  claim 13 , wherein said compounds of the general formula (I) are obtained from 
 (i) polyetherdiols,    (ii) diisocyanates, and    (iii) compounds, R of the general formula R—OH, R—SH, R—NH 2 , RR′NH or R—COOH, where R is a hydrophobic aliphatic or aromatic radical of at least 4 carbon atoms and R—OH may have been alkoxylated, and also further derivatives thereof that are capable of forming a urethane, thiourethane or urea bond,    said compounds of the formula (II) are obtained from    (i) polyetherdiols with    (iv) compounds of the general formula R—OH or R—COOH, where R is a hydrophobic aliphatic or aromatic radical of at least 4 carbon atoms and R—OH may have been alkoxylated, and also further derivatives thereof that are capable of forming an ether or ester bond, and    said compounds of the formula (III) are obtained from said compounds (ii) and (iii).    
     
     
         15 . An aqueous pretreatment liquor as claimed in  claim 13 , wherein said polyetherdiols (ii) are at least one selected from the group consisting of polyethylene glycol, polypropylene glycol and polytetrahydrofuran and copolymers of ethylene oxide and propylene oxide or butylene oxide and terpolymers of ethylene oxide and propylene oxide and butylene oxide.  
     
     
         16 . An aqueous pretreatment liquor as claimed in  claim 11 , comprising: 
 (a) from 0.1% to 50% by weight of polycationic compounds (A),    (b) from 0.1% to 50% by weight of thickeners (B),    (c) from 0% to 30% by weight of customary additives (C), and    (d) water ad 100% by weight.    
     
     
         17 . A pretreatment composition comprising said components (A), (B) and optionally (C) as defined in  claim 11 .  
     
     
         18 . A process for pretreating a textile substrate for inkjet printing, which comprises applying the aqueous pretreatment liquor of  claim 11  to said textile substrate and subsequently drying the impregnated textile substrate.  
     
     
         19 . A process for printing a textile substrate by the inkjet process, which comprises applying the aqueous pretreatment liquor of  claim 11 , drying the impregnated textile substrate and printing said impregnated textile substrate by the inkjet process.  
     
     
         20 . The printed textile substrate obtained by the process of  claim 19.