申请人:MINNESOTA MINING AND MANUFACTURING COMPANY
公开号:EP0441524A2
公开(公告)日:1991-08-14
The present invention relates to photosensitive compounds, more particularly polymers containing halomethyl-1,3,5-triazine moieties and to radiation-sensitive compositions and elements utilizing these polymers. Migration typically occurs in photopolymerizable compositions containing low molecular weight monomers and plasticizers, which tend to diffuse between layers, carrying along other ingredients such as the photoinitiator. This invention provides radiation-sensitive organo-halogen compounds that have a photo-labile halomethyl-1,3,5-triazine moiety and a polymeric moiety within the same molecule. The compounds of this invention are comprised of a polymeric moiety having attached or incorporated within its structure at least one 1,3,5-triazine nucleus, said triazine nucleus having at least one halomethyl substituent attached to a carbon atom of the triazine nucleus. These compounds are capable of being stimulated by actinic radiation at wavelengths of from about 250 to about 900 nanometers to generate free radicals and/or acids. The compounds of this invention are useful as photoinitiators in free radical polymerization reactions, oxidation-reduction reactions, or reactions sensitive to acid, and they also exhibit the capability to crosslink upon exposure to light. The polymers of this invention are less susceptible to migration on account of the anchoring or ballasting of the halomethyl-1,3,5-triazine.
本发明涉及光敏化合物,特别是含有卤代甲基-1,3,5-三嗪分子的聚合物,以及利用这些聚合物的辐射敏感组合物和元件。迁移通常发生在含有低分子量单体和增塑剂的可光聚合组合物中,这些单体和增塑剂容易在层间扩散,并携带光引发剂等其他成分。本发明提供了对辐射敏感的有机卤素化合物,这些化合物在同一分子中具有光敏卤甲基-1,3,5-三嗪分子和聚合分子。本发明的化合物由聚合分子组成,聚合分子的结构中连接或包含至少一个 1,3,5-三嗪核,所述三嗪核的碳原子上连接有至少一个卤代甲基。这些化合物能够在波长为 250 纳米到 900 纳米的光辐射刺激下生成自由基和/或酸。本发明的化合物在自由基聚合反应、氧化还原反应或对酸敏感的反应中可用作光引发剂,它们还能在光照下交联。由于卤甲基-1,3,5-三嗪的锚定或压载作用,本发明的聚合物不易迁移。