Adhesive capable of being cured by ultraviolet light and moisture and preparation method thereof

Abstract

The invention discloses an adhesive capable of being cured by ultraviolet light and moisture and a preparation method of the adhesive. The adhesive is prepared from the following components in parts by mass: 20-60 percent of silane-terminated oligomer, 10-40 percent of polyurethane acrylate oligomer, 5-40 percent of acrylate monomer, 0.5-5 percent of silane coupling agent, 0.5-5 percent of free radical photoinitiator and 0.5-5 percent of photoacid generator. The ultraviolet light and moisture curing adhesive has good storage stability due to the introduction of the photo-acid generator, the adhesive composition has good mechanical properties, high and low temperature resistance and high temperature and high humidity reliability after being cured due to the silane-terminated polymer, colloid cracking is not prone to occurring due to the environmental stress effect, and the adhesive composition has good weather resistance and high temperature and high humidity resistance. The adhesive can be rapidly cured after being irradiated by ultraviolet light, has a very good positioning effect on bonding of the camera window, meets a continuous and rapid production and assembly process, is completed through later moisture curing, and has good bonding strength and excellent reliability on the whole.

Description

technical field [0001] The invention relates to the field of curing adhesives, in particular to an ultraviolet light and moisture curable adhesive and a preparation method thereof. Background technique [0002] At present, in many electronic industry fields, such as the manufacture of security cameras, adhesives are usually used to bond substrates and components such as plastics, glass, and coated metals. Security camera assembly requires no fogging on the inner surface of the camera window, lens, and protective cover, no water vapor and dust infiltration during long-term use, otherwise the shooting effect of the security lens will be greatly affected. Most of the existing camera assembly and sealing use UV glue (ultraviolet light curing adhesive), which has fast curing speed, fast assembly rhythm and high environmental protection. However, the complex and special design and opaque base components such as glass fiber reinforced plastics and metals make the dark areas that c...

AI Technical Summary

Problems solved by technology

Prior art compositions based on silane-functional polymers generally have a slow curing rate under the influence of moisture at room temperature, necessitating the addition of basic, acidic or metal-containing catalysts, but also limit the workability of the adhesive during application And reduce the storage and use stability of the system

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