A free radical curable liquid for inkjet printing of food packaging materials includes no initiator or otherwise one or more initiators selected from the group consisting of non-polymeric di- or multifunctional initiators, oligomeric initiators, polymeric initiators, and polymerizable initiators; wherein the polymerizable composition of the liquid consists essentially of: a) 25-100 wt % of one or more polymerizable compounds A having at least one acrylate group G1 and at least one second ethylenically unsaturated polymerizable functional group G2 different from the group G1; b) 0-55 wt % of one or more polymerizable compounds B selected from the group consisting of monofunctional acrylates and difunctional acrylates; and c) 0-55 wt % of one or more polymerizable compounds C selected from the group consisting of trifunctional acrylates, tetrafunctional acrylates, pentafunctional acrylates and hexafunctional acrylates. If the weight percentage of compounds B>24 wt %, then the weight percentage of compounds C>1 wt %; and wherein all weight percentages of A, B and C are based upon the total weight of the polymerizable composition. At least one polymerizable compound B or C is present in the polymerizable composition if the free radical curable liquid contains no initiator. The polymerizable compound A has a copolymerization ratio of
0.002<
r
2/
r
1<0.200
with r1 and r2 representing the copolymerization parameters of methyl-G1 respectively methyl-G2 determined according to the method of Kelen-Tudos.
一种用于食品包装材料的喷墨印刷的自由基可固化液体,不包括
引发剂或者选择自非聚合二元或多元
引发剂、寡聚
引发剂、聚合
引发剂和可聚合
引发剂中的一种或多种
引发剂;其中所述液体的聚合组成物质基本上包括:a)25-100重量%的至少具有一个
丙烯酸酯基团G1和至少一个与G1不同的第二个
乙烯基不饱和聚合可功能基团G2的一个或多个聚合可化合物A; b)0-55重量%的单官能
丙烯酸酯和双官能
丙烯酸酯中选择的一个或多个聚合可化合物B;以及c)0-55重量%的三官能
丙烯酸酯、四官能
丙烯酸酯、五官能
丙烯酸酯和六官能
丙烯酸酯中选择的一个或多个聚合可化合物C。如果化合物B的重量百分比> 24重量%,则化合物C的重量百分比> 1重量%; 其中A,B和C的所有重量百分比都基于聚合可组分的总重量。如果自由基固化液体不含
引发剂,则至少存在一种聚合可化合物B或C在聚合可组分中。聚合可化合物A具有0.002