Dual-curing unsaturated polyester transparent primer and preparation method thereof

Abstract

The invention discloses a dual-curing unsaturated polyester transparent primer and a preparation method thereof. The dual-curing unsaturated polyester transparent primer is prepared from main paint, diluent, an initiator, accelerant and a curing agent. The main paint is prepared from unsaturated polyester resin, defoamer, dispersant, an anti-settling agent, a flatting agent, a polymerization inhibitor, a grinding agent, filler and an active solvent. The curing agent is prepared from a TDI addition product and polyurethane-level n-butyl acetate. The diluent is prepared from n-butyl acetate, styrene and methylbenzene. Polyurethane is contained in the primer, curing crosslinking points of unsaturated polyester can be increased, the crosslinking reaction density can be increased, the curing reaction speed can be increased, the dryness of the unsaturated polyester transparent primer in the low-temperature environment can be effectively improved, grinding time cam be obviously shortened, grinding performance can be improved, the coating production period is greatly shortened, and the advantages of saving energy, being environmentally friendly and the like are achieved.

Description

technical field [0001] The invention relates to the field of paints, in particular to an unsaturated polyester transparent primer. Background technique [0002] Unsaturated polyester transparent primer has the advantages of high hardness, high fullness, excellent adhesion, good transparency, and easy polishing. It is widely used in the furniture industry, but the curing reaction of unsaturated polyester belongs to free radical copolymerization, and the curing reaction is affected The effect of temperature is significant, especially in low temperature conditions in winter, the reaction speed becomes very slow, resulting in sticky surface of the coating film, the polishing time is greatly prolonged, even more than 24 hours, sticky sand is difficult to polish, the production efficiency is low, and the production demand cannot be met. It has brought great limitations to the construction and performance of furniture coating, so solving the construction limitations of unsaturated ...

AI Technical Summary

Problems solved by technology

[0002] Unsaturated polyester transparent primer has the advantages of high hardness, high fullness, excellent adhesion, good transparency, and easy polishing. It is widely used in the furniture industry, but the curing reaction of unsaturated polyester belongs to free radical copolymerization, and the curing reaction is affected The effect of temperature is significant, especially in low temperature conditions in winter, the reaction speed becomes very slow, resulting in sticky surface of the coating film, the polishing time is greatly prolonged, even more than 24 hours, sticky sand is difficult to polish, the production efficiency is low, and the production demand cannot be met. It has brought great limitations to the construction and performance of furniture coating, so solving the construction limitations of unsaturated polyester transparent primers under low temperature conditions and improving the sandability has become an important topic in the coatings industry