Silicon-containing double-curing group resin and preparation method thereof

Abstract

The invention discloses silicon-containing double-curing group resin and a preparation method thereof. Two preparation methods can be applied in the invention. The first preparation method comprises the following steps of: synthesizing acrylic epoxy monoester firstly; reacting hydroxyl silicone oil, diisocyanate and hydroxyl acrylic resin to obtain urethane acrylate with an NCO functional group at one end; and reacting two kinds of resin together to obtain silicon-containing urethane acrylate-modified epoxy monoester; and the second preparation method comprises the following steps of: synthesizing the acrylic epoxy monoester firstly; reacting dihydric alcohol, the diisocyanate and the hydroxyl acrylic resin to obtain the urethane acrylate with the NCO functional group at one end; reacting two kinds of resin together and then reacting the mixture with amino silicone oil to obtain the silicon-containing double-curing group resin. According to the invention, groups with two different curing modes are contained in the same resin molecule and the problem of compatibility of resin in different resin compounding, mixing and curing systems is solved; and on the other hand, a urethane acrylate-modified flexible chain and an organic silicon chain segment are modified so as to improve the performance of the resin.

Description

technical field [0001] The invention relates to the technical field of organic polymer synthesis; in particular, it relates to an organic silicon chain segment, and has both ultraviolet light-induced free radical curing groups (acrylate double bonds) and ultraviolet light-induced cationic curing groups or thermal curing groups. The invention discloses a preparation method of group (epoxy group) resin, which can be used in the fields of free radical-cation ultraviolet light mixed curing type or free radical light curing-thermal mixed curing type coating, adhesive, ink and the like. Background technique [0002] Ultraviolet (UV) curing technology has developed rapidly because of its characteristics of fast, solvent-free, and suitable for assembly line production. It can be used as a surface protective coating for plastics, metals, wood, paper, optical fibers, etc., and is widely used in industry. UV curing system is generally composed of photoactive oligomers (resins), monofu...

AI Technical Summary

Problems solved by technology

The free radical photocuring system has the advantages of fast curing speed and various types of initiators, but there are also problems such as not easy surface drying, large shrinkage of polymerization volume, poor adhesion, and no post-curing effect. At present, UV-curable products mainly use free radicals. curing system

The cationic photocuring system has the advantages of small volume shrinkage, strong adhesion, and post-curing, but it also has the disadvantages of slow curing speed, less types of oligomers and reactive diluents, etc. It is mainly used in dark coatings or ink systems

In order to give full play to the advantages of various curing methods and avoid their shortcomings, the research on various hybrid UV curing systems has been paid more and more attention, and various forms of hybrid UV curing systems have been developed, mainly UV-free Radical-cation hybrid curing, UV radical-thermal hybrid curing, UV-air hybrid curing, UV-moisture hybrid curing, etc. These hybrid curing systems are mainly composed of two or more resins containing different curing groups. However, there are relatively few reports on the synthesis of resins with two curing groups at the same time.

[0004] In various hybrid UV curing systems, most researchers use the mixture of several resins with different curing groups, so there are problems such as uneven local curing or poor compatibility between resins.

[0005] Resins commonly used in ultraviolet (UV) curing products include epoxy acrylate, urethane acrylate, polyester acrylate, etc. These resins can meet the needs of most applications, but in order to make the cured film have some special properties to meet For special needs, groups containing fluorine, phosphorus, silicon and other elements can be introduced into oligomers, monofunctional or multifunctional diluents. The introduction of fluorine-containing monomers is mainly to improve the surface properties of the cured film, but its price is relatively high. High, which affects its use; the synthesis and use of phosphorus-containing monomers are mainly designed for flame-retardant requirements, and there are not many units engaged in research in this area; silicon-containing compounds have low viscosity-temperature coefficients and low prices. , excellent interface properties, good softness, good lubricity, chemical stability and outstanding weather resistance, etc., have been widely concerned and researched