Photosensitive composition containing bifunctional photoinitiator

Abstract

The invention relates to the technical field of light curing, concretely to a photosensitive composition containing a bifunctional photoinitiator. The composition comprises 1-8 mass parts of a benzophenone derivative photoinitiator, 10-80 mass parts of ethene unsaturated compound monomer and 10-80 mass parts of ethene unsaturated compound prepolymer. According to the invention, the composition contains the specific benzophenone derivative which belongs to the bifunctional photoinitiator as a photopolymerization initiator, and thus photosensitive activity of the photosensitive composition can be greatly improved, and when exposed to LED lights, the photosensitive composition is extremely excellent in curing performance and can well match with the LED light sources.

Description

technical field [0001] The invention relates to the technical field of photocuring, in particular to a photosensitive composition containing a bifunctional photoinitiator. Background technique [0002] UV curing refers to the curing process of monomer, oligomer or polymer matrix induced by ultraviolet light. This technology is widely used in modern microelectronics technology. The photocurable composition in the UV curing system is mainly composed of single It consists of three parts: body, prepolymer and photoinitiator, among which photoinitiator is the most important factor affecting the photosensitive performance of photocurable composition. [0003] The commonly used UV light source is a mercury lamp, and traditional photoinitiators such as benzoin derivatives, biphenyl ketals, α,α-dialkoxyacetophenones, benzophenones / amines, Michler’s ketones, thiazoles Ketones / amines are designed and developed based on the principle of matching the emission wavelength of mercury lamps...

AI Technical Summary

Problems solved by technology

[0003] The commonly used UV light source is a mercury lamp, and traditional photoinitiators such as benzoin derivatives, biphenyl ketals, α,α-dialkoxyacetophenones, benzophenones / amines, Michler’s ketones, thiazoles Ketones / amines are all designed and developed based on the principle of matching the emission wavelength of mercury lamps, while mercury lamps have high energy consumption, unstable light sources, and great harm to the human body

Light-emitting diode (LED) lamps have the advantages of energy saving, small size, long service life, and low temperature. They are expected to replace mercury lamps and become the mainstream light source for photocuring technology. However, the emission wavelength of LED lamps is a single wavelength, mainly 365nm, 395nm, 405nm, Among them, the output energy at 395nm is relatively high, and it is difficult for traditional photoinitiators to match the light source emitted by LED lamps, and the energy emitted by LED lamps is much lower than that of mercury lamps, which makes it difficult for traditional photoinitiators to be activated under LED light sources. As a result, the system cannot be polymerized and solidified smoothly