An apparatus (
1
) for the application of a composition curable by irradiation to a fastener (
2
) having a conveyor (
3
) for conveying fasteners to an application station (
5
); an application station (
10
) comprising an applicator from which the composition is dispensed. The conveyor rotates the fasteners past the applicator for application of composition. The same or another conveyor (
8
) conveys the fasteners to an irradiation station (
10
) and rotates the fasteners for irradiation thereof. The irradiation station irradiates and thus cures the composition applied to each fastener. The invention also provides a curable composition for application to a threaded article, comprising a dispersion of: (i) components of a first cure mechanism comprising: (a) a (meth)acrylate functional monomer component; (b) a (meth)acrylate functional oligomer component; and (c) a photoinitiator component; (ii) components of a second cure mechanism comprising: (e) an amine component; and (f) an encapsulated epoxy resin component; together with (iii) a thickener component suitable to impart sufficient viscosity to the uncured composition to maintain the dispersion of the other components in the composition; wherein the photoinitiator component is suitable upon irradiation of the composition to achieve a first cure through the depth of the composition applied to a threaded article so that a binder matrix is formed with the components of the second cure mechanism dispersed through the matrix.
一种用于将可通过辐射固化的组合物应用于具有输送机的紧固件的装置(1)(2),输送机(3)用于将紧固件传送到应用站(5);应用站(10)包括一个应用器,用于分配组合物。输送机将紧固件旋转过应用器,以应用组合物。同一或另一个输送机(8)将紧固件传送到辐照站(10),并旋转紧固件以进行辐照。辐照站照射并因此固化应用于每个紧固件上的组合物。本发明还提供了一种可固化组合物,用于应用于螺纹制品,包括:(i)第一固化机制的组分,包括:(a)(甲基)
丙烯酸酯官能单体组分;(b)(甲基)
丙烯酸酯官能低聚物组分;和(c)光
引发剂组分;(ii)第二固化机制的组分,包括:(e)胺组分;和(f)封装环氧
树脂组分;以及(iii)适合赋予未固化组合物足够粘度以维持组合物中其他组分的分散的
增稠剂组分;其中,光
引发剂组分适合在对螺纹制品应用的组合物进行辐照时,通过组合物的深度实现第一固化,从而形成具有第二固化机制组分分散在其中的粘合剂基质。