Super-branching silicon-base macromolecule optical initiator and preparation method thereof

Abstract

The present invention discloses one kind of superbranched Si-base macromolecular photoinitiator and its preparation, and features that the superbranched Si-base macromolecular photoinitiator is prepared through the first Si-H addition reaction to prepare superbranched organosilicon polymer with excellent flowability, high solubility and excellent reaction performance, and the subsequent reaction of the organosilicon polymer and modified small molecular weight photoinitiator. The superbranched Si-base macromolecular photoinitiator can initiate the polymerization or cross-linking of compound containing acrylate or similar radical under the irradiation of ultraviolet ray. It is superior to small molecular weight photoinitiator, and has low mobility, low toxicity, high heat resistance and capacity of raising the heat resistance of the cured resin.

Description

technical field

[0001] The invention relates to a macromolecular photoinitiator and belongs to the field of polymer material synthesis. Background technique

[0002] Due to the advantages of high efficiency, energy saving, and environmental protection, photopolymerization and photocuring technology, especially in places that are sensitive to heat, have become scientific research hotspots and one of the fastest growing industrial technologies in recent years. Photoinitiator is an important part of photopolymerization or photocuring system, which not only affects the initiation rate, but also has an important influence on the properties of cured products (such as toxicity, mechanical properties, thermal properties, etc.). The existing small-molecule photoinitiators have disadvantages such as large odor, high volatility, poor migration resistance, high toxicity, and yellowing, which are difficult to meet the needs of further development of photopolymerization and photocuring te...