申请人:Allnex Belgium, S.A.
公开号:EP2878613A1
公开(公告)日:2015-06-03
The present invention relates to stabilizers for thiol-ene compositions and to radiation curable thiol-ene compositions based thereon. Such radiation curable compositions can advantageously be used in inks, coatings, adhesives, for the making of 3D objects and for the making of solder resist and gel nails.
Provided in particular is an inhibitor system (I) for thiol-ene compositions based on
- at least one inhibitor compound (i) having a % DPPH radical scavenging activity of at least 90%, the inhibitor compound (i) being selected from substituted benzene compounds or substituted naphthalene compounds containing at least two substituents selected from the group consisting of hydroxyl groups and C1-C3 alkoxy groups bonded directly to the benzene or the naphthalene ring,
- at least one acidic compound (ii) having a pKa between 1 and 3, and
- at least one compound (iii) selected from the group consisting of phosphites and
phosphonites,
with the proviso that if the inhibitor compound (i) is a substituted benzene that it contains at least two hydroxyl groups bonded directly to the benzene ring.
Also provided is an inhibitor system (II) for thiol-ene compositions based on that is based on
- at least one inhibitor compound (i) having a % DPPH radical scavenging activity of at least 90%, the inhibitor compound (i) being selected from substituted benzene compounds or substituted naphthalene compounds containing at least two substituents selected from the group consisting of hydroxyl groups and C1-C3 alkoxy groups bonded directly to the benzene or the naphthalene ring,
- at least one compound (iv) selected from the group consisting of spirophosphites, and
- optionally, at least one acidic compound (ii) having a pKa between 1 and 3, and
with the proviso that if the inhibitor compound (i) is a substituted benzene that it contains at least two hydroxyl groups bonded directly to the benzene ring.
本发明涉及硫醇-烯组合物的稳定剂以及以其为基础的辐射固化硫醇-烯组合物。这种可辐射固化的组合物可以很好地用于油墨、涂料、粘合剂、三维物体的制造以及阻焊剂和凝胶钉的制造。
本发明特别提供了一种用于硫醇-烯组合物的抑制剂体系 (I),该体系基于
- 至少一种抑制剂化合物 (i),其 DPPH 自由基清除活性至少为 90%,该抑制剂化合物 (i) 选自取代的苯化合物或取代的萘化合物,其中至少含有两个取代基,这两个取代基选自由羟基和 C1-C3 烷氧基组成的组,直接与苯环或萘环键合、
- 至少一种酸性化合物 (ii),其 pKa 值介于 1 和 3 之间,以及
- 至少一种选自亚磷酸盐和亚膦酸盐的化合物 (iii)
膦酸盐、
但如果抑制剂化合物 (i) 是取代苯,则至少含有两个直接键合在苯环上的羟基。
还提供了一种用于硫醇-烯组合物的抑制剂体系 (II),该体系基于以下条件
- 至少一种抑制剂化合物 (i),其 DPPH 自由基清除活性至少为 90%,该抑制剂化合物 (i) 选自取代的苯化合物或取代的萘化合物,其中至少含有两个取代基,这两个取代基选自由羟基和直接与苯环或萘环键合的 C1-C3 烷氧基组成的组、
- 至少一种选自由亚硫基膦组成的组的化合物 (iv),以及
- 可选地,至少一种 pKa 在 1 和 3 之间的酸性化合物 (ii),以及
但如果抑制剂化合物 (i) 是取代苯,则至少含有两个直接与苯环键合的羟基。