A hybrid epoxy acrylate uv coating with high surface hardness

Abstract

The invention discloses a hybrid epoxy acrylate UV coating with high surface hardness, which comprises the following components: epoxy acrylate oligomer, modified silicon dioxide, reactive diluent, photoinitiator, auxiliary agent or hybrid Epoxy acrylate oligomer, reactive diluent, photoinitiator, auxiliary agent; Described hybrid epoxy acrylate oligomer adopts the in-situ sol-gel method to combine silicon dioxide precursor in epoxy In situ hydrolysis polymerization product prepared in acrylate oligomer system. The present invention improves the compatibility of silica particles and photocurable resin systems by preparing transparent silica nanoparticles and modifying them to match the UV curable resin system; the hybrid epoxy acrylic acid of the present invention Ester UV coatings have low viscosity and low addition of inorganic components, and the prepared coating has excellent hardness and wear resistance. It has great potential in the application of flooring and other furniture fields, 3C product fields and other wear-resistant fields. value.

Description

technical field [0001] The invention belongs to the field of photocurable resins and coatings, and relates to a hybrid epoxy acrylate UV coating with high surface hardness, in particular to a hybrid epoxy acrylate UV coating with high surface hardness prepared by using modified silica nanoparticles and photocurable epoxy acrylate resin Hybrid epoxy acrylate resin UV coating. Background technique [0002] UV-curable coatings have the characteristics of 5E and are environmentally friendly and efficient coatings. In recent years, UV-curable coatings have been widely used in the fields of packaging, furniture, electronics and automotive coatings. Traditional photocurable resins are mainly obtained by grafting reaction of photocurable acrylate groups with polyurethane and epoxy resins. Photocurable resins are mainly composed of organic components, resulting in low hardness and wear resistance after coating, which hinders the application of photocurable resins in some fields. F...

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Problems solved by technology

Generally speaking, directly adding inorganic fillers to the photocurable resin system can improve the hardness and wear resistance of the coating, but the dispersion and settlement of inorganic fillers in the photocurable resin system are difficult to solve, which has the following three problems: First, inorganic fillers generally have a larger particle size, and their density is higher than that of photocurable resins, which leads to rapid sedimentation of inorganic particles in the resin system. It is not suitable to increase the hardness and wear resistance of photocurable coatings by directly adding fillers; Second, theoretically, the sedimentation rate of nano-inorganic fillers in the photocurable resin system is negligible, but due to the extremely high surface energy of the nanoparticles, it is difficult to disperse in the resin system, causing the particles to form aggregates, which leads to The system is unstable; thirdly, it is generally necessary to add a large amount of inorganic components to the photocurable resin system to obtain a photocurable coating with better hardness and wear resistance, which usually leads to an increase in the viscosity of the system and phase separation of the inorganic filler in the system , problems with coating defects and reduced coating adhesion

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