Low odor radiation curable ink compositions

Abstract

The present invention relates to low odor radiation curable ink compositions. The composition comprises 10-40% w/w of 4-hydrobutylacrylate, 5-25% of a urethane (math)acrylate oligomer, 10-55% of diacrylates, one or more photoinitiators, one or more additives, and one or more pigments. The composition excludes many monofunctional monomers that have distinct odor and are commonly used in an ink jet composition.

What is claimed is: 
     
         1 . A paper-based corrugated stock having a low odor radiation curable ink composition printed and cured on its surface, wherein the ink composition comprises:
 15-30% w/w of 4-hydrobutylacrylate,   30-55% w/w of diacrylate selected from the group consisting of: dipropylene glycol diacrylate, dipropylene glycol diacrylate, propoxylated neopentyl glycol diacrylate, aliphatic urethane diacrylate, and a combination thereof,   one or more photoinitiators,   one or more additives, and   one or more pigments;   wherein the ink composition contains less than 1% of monofunctional momoners that have an undesired odor selected from the group consisting of: vinyl caprolactam, 2-phenoxyethyl acrylate, isodecyl acrylate, 3,3,5-trimethylcyclohexyl acrylate, isooctyl acrylate, Octyldecyl acrylate, isobomyl acrylate, cycloaliphatic acrylate monomer, benzyl acrylate, di(ethylene glycol) 2-ethyl hexyl acrylate, tridecyl acrylate, 2(2-ethoxyethoxy) ethyl acrylate, lauryl acrylate, tetrahydrofurfuryl acrylate, and any combination thereof.   
     
     
         2 . The paper-based corrugated stock of  claim 1 , comprising 0.01-5% by weight of the one or more additives. 
     
     
         3 . The ink composition of  claim 2 , additive is a surfactant, a leveling additive, dispersant, or a stabilizer. 
     
     
         4 . The ink composition of  claim 1 , comprising 1-8% by weight of the one more pigments. 
     
     
         5 . The ink composition of  claim 1 , ink viscosity is 8-14 cP at 45° C. or less than 30 cp at 25° C.