申请人:Loctite (Ireland) Limited
公开号:US05523347A1
公开(公告)日:1996-06-04
A one-part, air-activatable, polymerizable composition comprising: (a) at least one free-radically polymerizable monomer, and (b) an activator system for effective polymerization of the free-radically polymerizable monomer, said activator system comprising at least one auto-oxidizable compound of a formula which includes the structure I: ##STR1## where x is 0 or 1, and where the lines representing unfilled valencies indicate bonds to carbon, hydrogen or hetero atoms, alone or in combination with a weak acid; with the proviso that: when x=0, the nitrogen atom in structure I is not bonded to a second nitrogen atom; and when x=1 there is a structure I in the compound in which the >C.dbd.C< moiety does not form part of a phenyl ring; with the proviso that the composition does not contain a peroxide, or a peroxide precursor which produces peroxide in the absence of air or any ingredient which is a significant source of radicals in the absence of air. Preferred auto-oxidizable compounds are selected from the group consisting of partially hydrogenated pyridines, condensation products of cyclic ketones and ureas, Schiff's bases, indoles, pyrroles, imidazoles, piperazines, carbazoles, tetrahydroquinolines, and substituted derivatives thereof, particularly dihydropyridines. The composition may also contain a soluble ionic salt, particularly a cobalt or iron salt. The compositions as described are stable on storage in the absence of air, are activated by exposure to air, and will then cure in either the presence or absence of air.
一种单组分、空气活化、聚合组合物,包括:(a) 至少一种自由基聚合单体,和(b) 用于有效聚合自由基聚合单体的活化剂系统,所述活化剂系统包括至少一种自氧化化合物,其公式包括结构I:##STR1## 其中x为0或1,表示未填充价键的线表示与碳、氢或杂原子的键合,单独或与弱酸组合;但是当x=0时,结构I中的氮原子未与第二个氮原子键合;当x=1时,化合物中存在一个结构I,其中>C.dbd.C<基团不形成苯环的一部分;同时,该组合物不包含过氧化物或生成过氧化物的过氧化物前体,在没有空气或任何成分的情况下,其是自由基的重要来源。首选的自氧化化合物是从部分氢化吡啶、环状酮和脲的缩合产物、席夫碱、吲哚、吡咯、咪唑、哌嗪、咔唑、四氢喹啉和其取代衍生物中选择的,特别是二氢吡啶。该组合物还可以含有可溶性离子盐,特别是钴盐或铁盐。所述组合物在没有空气的情况下储存稳定,在接触空气后被激活,并在存在或不存在空气的情况下固化。