Matte top-varnish with low ratio and low VOC and preparation method of matte top-coat paint

Abstract

The invention discloses matte top-varnish with a low ratio and low VOC. The matte top-varnish is prepared from a polyurethane top-varnish main agent, a curing agent and a diluting agent according to aconstruction weight ratio of 100:33:70, wherein the polyurethane top-varnish main agent is prepared from the following components in percentage by weight: 60.0 to 70.0 percent of soya oil alkyd resin, 6.5 to 9.8 percent of n-butyl acetate, 2.3 to 3.5 percent of propylene glycol methyl ether acetate, 4.4 to 7.5 percent of xylene, 0.2 to 0.5 percent of dispersing agent, 0.2 to 0.5 percent of defoaming agent, 0.2 to 0.5 percent of flatting agent, 1.9 to 5.5 percent of matte powder, 1.2 to 5.5 percent of wax slurry, and 5.2 to 7.5 percent of nitrocotton solution. The invention also discloses a preparation method of the matte top-varnish with the low ratio and low VOC. The product is used for coating the surface of woodware in a spraying manner, and has the characteristics of low ratio, low VOC, low odor, high pressure resistance, high transparency, high flexibility, good fullness, good flatting performance and good hand feeling and the like.

Description

technical field [0001] The invention relates to a coating composition, in particular to a low-proportion, low-VOC matte clear finish paint used for surface coating of wooden products and a preparation method thereof. Background technique [0002] Wood coatings not only have a decorative and beautifying effect, but also have a good protective effect on wood and prolong its service life. my country's indoor furniture mainly uses solvent-based wood coatings, which are divided into nitro, alkyd, polyurethane, etc., of which polyurethane is used in the largest amount. At present, the polyurethane paint used for wood surface coating on the market usually consists of two components, namely the main paint and the curing agent, which are mixed according to the predetermined ratio when used, and then an appropriate amount of thinner is added, and the coating can be carried out after stirring , Construction, easy operation, cost and price are relatively affordable. But existing polyu...

AI Technical Summary

Problems solved by technology

[0003] 1. The amount of curing agent is large. The curing agent is also called hardener. Its main component is TDI (toluene diisocyanate). TDI will turn yellow, which will not only turn the furniture paint surface yellow, but also turn the adjacent wall yellow. , This is a major disadvantage of polyurethane paint; 2. High VOC content, VOC is volatile organic compound, which has a huge impact on human health. When the VOC in the room reaches a certain concentration, people will feel headache, nausea, Vomiting, fatigue, etc. In severe cases, convulsions and coma will occur, and will damage the liver, kidneys, brain and nervous system, resulting in serious consequences such as memory loss

Images