Dual-curing unsaturated polyester white primer and preparation method thereof

Abstract

The invention provides a dual-curing unsaturated polyester white primer and a preparation method thereof. The dual-curing unsaturated polyester white primer is composed of a main paint, a diluter, an initiator, an accelerator and a curing agent. The main paint is composed of an unsaturated polyester resin, a defoaming agent, a dispersing agent, an anti-settling agent, a leveling agent, a polymerization inhibitor, a sanding agent, titanium white, a filler and an active solvent. The curing agent is composed of a TDI (toluene diisocyanate) addition product and polyurethane-grade butyl acetate. The diluter is composed of butyl acetate, styrene and toluene. The unsaturated polyester resin is an air-drying unsaturated polyester resin, thereby avoiding the phenomenon of undried and sticking paint film surface since oxygen can easily have the polymerization inhibition effect in the construction process. The polyurethane contained in the raw materials can increase the curing crosslinking points of the unsaturated polyester, enhance the crosslinking reaction density, increase the curing reaction speed, enhance the sanding property and shorten the application production cycle, has the advantages of excellent adhesive force and favorable anti-cracking effect in case of thick coating, and completely satisfies the furniture application requirements.

Description

technical field [0001] The invention relates to the field of paints, in particular to an unsaturated polyester white primer. Background technique [0002] Unsaturated polyester white primer has the advantages of excellent filling, high hardness, good fullness, not easy to collapse, hard and bright paint film, aging resistance, corrosion resistance, etc., because it is widely used in white furniture coating, but it is not saturated The curing reaction of polyester belongs to the free radical copolymerization reaction. When the film is cured, the surface of the paint film is not dry and sticky due to the inhibition of oxygen in the air. The curing reaction is significantly affected by the ambient temperature and humidity, especially in low temperature conditions in winter. The reaction speed becomes very slow, the grinding time is greatly prolonged, the production efficiency is low, and the production demand cannot be met; in addition, due to improper construction during the c...

AI Technical Summary

Problems solved by technology

[0002] Unsaturated polyester white primer has the advantages of excellent filling, high hardness, good fullness, not easy to collapse, hard and bright paint film, aging resistance, corrosion resistance, etc., because it is widely used in white furniture coating, but it is not saturated The curing reaction of polyester belongs to the free radical copolymerization reaction. The surface of the paint film is not dry and sticky due to the inhibition of oxygen in the air when it is cured into a film. The curing reaction is significantly affected by the ambient temperature and humidity, especially in low temperature conditions in winter. The reaction speed becomes very slow, the grinding time is greatly extended, the production efficiency is low, and the production demand cannot be met; in addition, due to improper construction during the coating process, when one-time thick coating is used, it is easy to appear in the place where the furniture groove is thick with oil. Cracking, resulting in rework, has brought great limitations to the construction and performance of furniture coating, so solving the construction limitations of unsaturated polyester white primer, improving the sandability in low temperature environments, and preventing thick coatings from cracking has become An important topic in the coatings industry