Sericol Limited

Kevin G Burns

Carole Noutary

Scott Biggs

Nigel P Gould

Helen Jezequel

This invention provides an inkjet ink comprising: an &#x3b1;,&#x3b2;-unsaturated ether monomer in which the only radiation-curable functional groups present in the monomer are &#x3b1;,&#x3b2;-unsaturated ether groups; a tri- or higher functionality (meth)acrylate monomer in which the only radiation-curable functional groups present in the monomer are acrylate groups; and a colouring agent; wherein the ink contains less than 5% by weight of water and volatile organic solvents in total, and less than 10% by weight of mono- and di-functional monomers in total, other than the &#x3b1;,&#x3b2;-unsaturated ether monomer, where the amounts by weight are based on the total weight of the ink, and wherein the ink has a viscosity of less than 100 mPas at 25&#xb0; C. The ink is particularly suitable for printing onto food packaging.

Printing ink

This invention provides an inkjet ink comprising: an &#x3b1;,&#x3b2;-unsaturated ether monomer in which the only radiation-curable functional groups present in the monomer are &#x3b1;,&#x3b2;-unsaturated ether groups; a tri- or higher functionality (meth)acrylate monomer in which the only radiation-curable functional groups present in the monomer are acrylate groups; and a colouring agent; wherein the ink contains less than 5% by weight of water and volatile organic solvents in total, and less than 10% by weight of mono-and di-functional monomers in total, other than the &#x3b1;,&#x3b2;-unsaturated ether monomer, where the amounts by weight are based on the total weight of the ink, and wherein the ink has a viscosity of less than 100 mPas at 25&#xb0; C. The ink is particularly suitable for printing onto food packaging.

Radiation-curable compositions including a free radically polymerizable monomer or prepolymer and a different monomer containing an N-vinyl group, said different monomer being a solid at ambient temperature. The different monomer is preferably N-vinyl caprolactam, N-vinyl carbazole, or N,N'-divinyl-2-imidazolidone, for example in an amount of from 1 to 50 percent by weight of the said different monomer. Such compositions have shown good adhesion to and have rendered plastics substrates wettable by the compositions before curing, without the presence of N-vinyl-2-pyrrolidone.

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Margate, United Kingdom

Kevin G Burns