What are the characteristics of unsaturated polyester Varnish and how to use it?

Unsaturated polyester varnish is a mixture of unsaturated polyester varnish made from unsaturated dibasic acid and diol, and a crosslinking agent. It can be formed at room temperature in the presence of initiators and accelerators. Cross-linking reaction, curing into film. Ethylene is a commonly used cross-linking agent, and also has a diluting effect; initiators are also called cross-linking catalysts, such as benzoyl peroxide, cyclohexanone peroxide, etc.; accelerators include naphthenic acid pins. Dimethyl benzylamine, etc.

The film of unsaturated polyxidang varnish has high hardness, mirror-like luster, wear resistance, acid resistance, alkali resistance, heat resistance and other excellent properties.

When using unsaturated polycool varnish, it is necessary to mix the components according to the ratio specified by each type of paint, otherwise it will cause adverse consequences. If the amount of initiator is insufficient, the polymerization process will be slow, and the paint film will not cure for a long time, and sometimes it will take several days; on the contrary, if there is too much initiator, the curing will be rapid, and adverse consequences will easily occur; If it is too low, the paint film will shrink and wrinkle, and the surface quality will be poor; if there is too little styrene, it will not be fully cured. Adding acetone will make the paint film more brittle, prone to holes, lower adhesion and easy to crack and peel off. The peroxide initiator cannot be directly mixed with accelerators such as bad alkanoic acid zirconium. The initiator should be mixed thoroughly in the unsaturated polyol resin before adding the accelerator to avoid explosion accidents.

Oxygen is the polymerization inhibitor of unsaturated polycarbonate, therefore, its varnish film needs to be separated from oxygen. There are two types of waxy polyester paint and non-waxy polyester paint currently used in furniture coating. The wax type is to add high melting point paraffin to the paint. When the paint is painted on the wood surface, the paraffin is light and floats on the paint film to isolate the air. The non-wax type is that no paraffin is added to the paint, and a layer of polyester cellophane is used to cling to the paint film so that the paint does not come into contact with the air to form a film. After the film is formed, the cellophane is removed, and the paint film is smooth and bright as a mirror. After the wax liquid is solidified, the paraffin wax remaining on the surface of the paint film must be removed with water sand, the process is complicated, and the brightness is worse than that of the non-wax type. Therefore, the non-wax type is currently used more. After the appearance of panel furniture, the new technology of non-wax type unsaturated resin has been promoted.