Radiation curable etch resistant inkjet ink printing

摘要

An inkjet printing radiation curable inkjet ink for forming a protective layer during an etching process includes at least 70 percent by weight of a polymerizable composition based on the total weight of radiation curable inkjet ink, wherein the polymerizable composition has an oxygen fraction OFR>0.250 and a weighted polymerizable functionality WPF≧0.0050, and the polymerizable composition contains no polymerizable compound with an ethylenic double bond and including a phosphoester group or a carboxylic acid group in the molecule thereof.

主权项

1. A method of inkjet printing comprising the steps of:
a) forming protected areas on a metal surface by printing and curing a radiation curable inkjet ink on the metal surface; b) removing metal from unprotected areas of the metal surface by etching; and c) removing at least partially the radiation curable inkjet ink cured on the metal surface from the protected areas of the metal surface; wherein the radiation curable inkjet ink includes at least 70 percent by weight of a polymerizable composition based on a total weight of the radiation curable inkjet ink; the polymerizable composition has an oxygen fraction OFR>0.250 and a weighted polymerizable functionality WPF≧0.0050;OFR=∑i=1n⁢⁢15.9994×NO,i×%⁢⁢wtiMWi×%⁢⁢wtPWPF=∑i=1n⁢⁢NP,i×%⁢⁢wtiMWi×%⁢⁢wtP n=a number of polymerizable compounds in the polymerizable composition having a different chemical structural formula from each other; NO,i=a number of oxygen atoms in polymerizable compound i; NP,i=a number of polymerizable groups in the polymerizable compound i; MWi=a molecular weight of the polymerizable compound i; % wti=a weight percentage of the polymerizable compound i based on the total weight of the radiation curable inkjet ink; % wtP=a weight percentage of the polymerizable composition based on the total weight of the radiation curable inkjet ink; and the radiation curable inkjet ink contains no polymerizable compound with an ethylenic double bond including a phosphoester group and contains no polymerizable compound with an ethylenic double bond and a carboxylic acid group.