申请人:LOCTITE (IRELAND) Ltd.
公开号:EP0502733A1
公开(公告)日:1992-09-09
A one-part, air-activatable, polymerisable composition comprising:
(a) at least one free-radically polymerisable monomer, and
(b) an activator system for effective polymerisation of the free-radically polymerisable monomer, said activator system comprising at least one auto-oxidisable compound of a formula which includes the structure I:-
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
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-oxidisable 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、可在空气中激活的可聚合组合物,包括
(a) 至少一种可自由基聚合的单体,以及
(b) 用于有效聚合自由基可聚合单体的活化剂体系,所述活化剂体系包括至少一种自氧化化合物,其结构式为 I
其中 x 为 0 或 1,代表未填写化合价的线表示与碳、氢或杂原子的键,单独或与弱酸结合;
但条件是
当 x = 0 时,结构 I 中的氮原子不与第二个氮原子结合;
当 x = 1 时,化合物中存在结构 I,其中的分子不构成化合物的一部分。
当 x = 0 时,结构 I 中的氮原子不与第二个氮原子键合;当 x = 1 时,化合物中的结构 I 中的分子不构成苯环的一部分;
但该组合物不含有过氧化物,或在无空气条件下产生过氧化物的过氧化物前体,或在无空气条件下成为自由基重要来源的任何成分。
首选的可自动氧化的化合物选自部分氢化的
吡啶、环酮和
脲的缩合产物、席夫碱、
吲哚、
吡咯、
咪唑、
哌嗪、
咔唑、
四氢喹啉及其取代衍
生物,特别是
二氢吡啶。
组合物还可含有可溶性离子盐,特别是
钴盐或
铁盐。
所述组合物在无空气条件下储存稳定,暴露在空气中会被激活,然后在有空气或无空气条件下固化。