US2008092772A1PendingUtilityA1

Dye-Based Ink Compositions

58
Individually held — no corporate assignee on recordPriority: Mar 7, 2005Filed: Dec 14, 2007Published: Apr 24, 2008
Est. expiryMar 7, 2025(expired)· nominal 20-yr term from priority
Inventors:Zia RehmanJules G. Moritz, IiiArun AgarwalHiang P. Lauw
C09D 11/38
58
PatentIndex Score
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Cited by
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Claims

Abstract

Disclosed is an ink composition that includes a colorant; a water-soluble organic solvent; and a penetrant, where the penetrant may be a hydroxylated pentane. Also disclosed is an ink composition that includes a penetrant that enables the ink composition to maintain a drop weight of at least about 4.5 ng at high operating frequencies of an ink drop generator of the ink-jet printer.

Claims

exact text as granted — not AI-modified
1 . An ink composition, comprising: 
 a colorant;    a water-soluble organic solvent; and    a penetrant, wherein the penetrant is a hydroxylated pentane.    
     
     
         2 . The composition of  claim 1 , wherein the penetrant is chosen from a pentanediol or a pentanetriol.  
     
     
         3 . The composition of  claim 1 , wherein the penetrant is chosen from 1,5-pentanediol; 1,3-pentanediol; or 1,3,5-pentanetriol.  
     
     
         4 . The composition of  claim 1 , wherein the penetrant is chosen from a branched 1,5-pentanediol; a branched 1,3-pentanediol; or a branched 1,3,5-pentanediol.  
     
     
         5 . The composition of  claim 1 , wherein the penetrant is chosen from an alkyl-substituted 1,5-pentanediol, an alkyl-substituted 1,3-pentanediol; or an alkyl-substituted 1,3,5-pentanediol.  
     
     
         6 . The composition of  claim 1 , wherein the penetrant is a methyl-substituted 1,5-pentanediol; a methyl-substituted 1,3-pentanediol; or a methyl-substituted 1,3,5-pentanediol.  
     
     
         7 . The composition of  claim 1 , wherein the penetrant is 3-methyl-1,5-pentanediol; 2-methyl-1, 3-pentanediol; or 3-methyl-1,3,5-pentanediol.  
     
     
         8 . The composition of  claim 1 , wherein the penetrant comprises about 0.01-5% by weight of the ink composition.  
     
     
         9 . The composition of  claim 1 , wherein the penetrant comprises about 0.01-2% by weight of the ink composition.  
     
     
         10 . An ink composition for use in an inkjet printer, comprising: 
 a colorant;    a water-soluble organic solvent; and    a penetrant that enables the ink composition to maintain a drop weight of at least about 4.5 ng at high operating frequencies of an ink drop generator of the ink-jet printer.    
     
     
         11 . The composition of  claim 10 , wherein the penetrant enables the ink composition to maintain a drop weight of about 4.8 ng to 5.3 ng at high operating frequencies of a printhead of the ink-jet printer.  
     
     
         12 . The composition of  claim 10 , wherein the ink composition has an electrical conductivity from about 4 mS/cm to 10 mS/cm.  
     
     
         13 . The composition of  claim 10 , wherein the ink composition has an electrical conductivity from about 6 mS/cm to 7 mS/cm.  
     
     
         14 . The composition of  claim 10 , wherein the ink composition has a pH from about 6 to 9.5.  
     
     
         15 . The composition of  claim 10 , wherein the ink composition has a pH from about 7.5 to 8.5.  
     
     
         16 . The composition of  claim 10 , wherein the ink composition has a surface tension from about 40 dynes/cm to 60 dynes/cm.  
     
     
         17 . The composition of  claim 10 , wherein the ink composition has a surface tension from about 45 dynes/cm to 55 dynes/cm.  
     
     
         18 . The composition of  claim 10 , wherein the ink composition has a viscosity from about 1 cP to 4 cP.  
     
     
         19 . The composition of  claim 10 , wherein the ink composition has a viscosity from about 1.5 cP to 2.5 cP.  
     
     
         20 . The composition of  claim 10 , wherein the penetrant is 3-methyl-1,5-pentanediol, and wherein the ink composition: 
 maintains a drop weight of about 4.8 ng to 5.3 ng at high operating frequencies of the ink drop generator of greater than 18 KHz;    has a conductivity from about 6 mS/cm to 7 mS/cm;    has a pH from about 7.5 to 8.5;    has a surface tension from about 45 dynes/cm to 55 dynes/cm; and    has a viscosity from about 1.5 cP to 2.5 cP.    
     
     
         21 . The composition of  claim 10 , wherein the operating frequency of the ink drop generator is from about 35-60 KHz.

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