A free radical curable liquid for inkjet printing of food packaging materials comprising 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 said 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, with the proviso that 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;
with the proviso that at least one polymerizable compound B or C is present in the polymerizable composition if the free radical curable liquid contains no initiator;
wherein the polymerizable compound A has a copolymerization ratio of
with r1 and r2 representing the copolymerization parameters of methyl-G1 respectively methyl-G2 determined according to the method of Kelen-Tudos.
一种用于喷墨打印食品包装材料的自由基固化液体,不含
引发剂,或含有一种或多种
引发剂,这些
引发剂选自非聚合二或多功能
引发剂、低聚
引发剂、聚合
引发剂和可聚合
引发剂组成的组;
其中所述液体的可聚合成分主要包括
a) 25 - 100 wt%的一种或多种可聚合化合物 A,其具有至少一个
丙烯酸酯基团 G1 和至少一个不同于基团 G1 的第二
乙烯基不饱和可聚合官能团 G2;
b) 0 - 55 wt%的一种或多种可聚合化合物 B,选自由单官能
丙烯酸酯和双 官能
丙烯酸酯组成的组;以及
c) 0 - 55 wt%的一种或多种可聚合化合物 C,选自由三官能
丙烯酸酯、四官能
丙烯酸酯、 五官能
丙烯酸酯和六官能
丙烯酸酯组成的组,但如果化合物 B 的重量百分比大于 24 wt%,则化合物 C 的重量百分比大于 1 wt%;
其中 A、B 和 C 的所有重量百分比均基于可聚合组合物的总重量;
但如果自由基固化液体不含
引发剂,则至少有一种可聚合化合物 B 或 C 存在于可聚合组合物中;
其中可聚合化合物 A 的共聚比率为
r1 和 r2 分别代表根据 Kelen-Tudos 方法测定的甲基-G1 和甲基-G2 的共聚参数。