Water-based acrylic emulsion as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of polymer synthesis. A water-based acrylic emulsion comprises the following components: an acrylic acid soft monomer, an acrylic acid hard monomer, a functional monomer, a crosslinking monomer, an initiator, an emulsifier, a neutralizer, an assistant, a pH regulator and the balance of water, wherein the acrylic acid soft monomer is 2-ethylhexyl 2-propenoate and 2-ethylhexyl acrylate; the acrylic acid hard monomer is isobornyl methacrylate; the functional monomer is acrylic acid, methyl methacrylate and glycidyl methacrylate; and the cross-linking monomer is tetrahydrofurfuryl methacrylate, diacetone acrylamide and adipic dihydrazide. The water-based acrylic emulsion disclosed by the invention has good adhesive force, heat-resistant stability and resistance to chemicals, and the hardness, water resistance, scratch resistance and chemical resistance of a paint film can be improved when the water-based acrylic emulsion is applied to a water-based coating.

Description

technical field [0001] The invention belongs to the technical field of polymer synthesis, and in particular relates to a water-based acrylic emulsion and a preparation method and application thereof. Background technique [0002] The copolymer synthesized with monomers such as acrylate and methacrylate as the main raw material is acrylic resin. Acrylic resin has good adhesion and weather resistance. The coating that uses it as a film-forming substance is acrylic resin coating. Acrylic resin coating It is widely used because of its good weather resistance, corrosion resistance and pollution resistance. Existing acrylic resins are mainly solvent-based, which pollutes the environment greatly. Compared with solvent-based acrylic resins, water-based acrylic resins have better adhesion, water resistance, salt spray resistance, abrasion resistance, hardness, impact resistance, moisture resistance, and durability. The solvent performance is poor. After drying and forming a film, th...

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Problems solved by technology

Existing acrylic resins are mainly solvent-based, which pollutes the environment greatly. Compared with solvent-based acrylic resins, water-based acrylic resins have better adhesion, water resistance, salt spray resistance, abrasion resistance, hardness, impact resistance, moisture resistance, and durability. The solvent performance is poor. After the self-drying film is formed, the coating is formed by the accumulation of particles. The curing temperature is high. The coating containing water-based acrylic resin is not easy to form a film at low temperature. It needs to be baked and cured at high temperature, and the construction performance of the coating is poor.

The preparation of water-based acrylic emulsion mostly uses ionic emulsifiers. Although the emulsifying effect is good, it has requirements for the type of ions, and the storage stability is poor. It is prone to stratification in the same ionic environment, and the added ionic emulsifier is free from the system. , easy to migrate, poor water resistance and salt spray resistance after film formation

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