With the increasing maturity of steel basic research technology and the continuous introduction of foreign advanced equipment and technology, the domestic industry has developed rapidly in recent years, and the variety of gel coat resin has been expanding. The continuous improvement of gel coat resin in variety and performance has expanded its application field. At present, gel coat resin has been applied in many fields, such as health, such as shower tub, bathtub, platen, shipbuilding, such as yacht, lifeboat, patrol boat, transportation, industry, entertainment, medical instrument shell, billboard, telephone booth and security booth. Gel coat resin is divided into natural color gel coat and color gel coat. In the production process of products, color gel coat is needed in most cases. In the past, the color gel coat was made by adding an appropriate amount of color paste (also known as pigment paste) to the natural color gel coat, which was manually adjusted and matched. The color glue thus prepared often caused color difference in the production process of large-scale assembled products, such as cooling tower or mass products, such as seats on the viewing platform in the playground, which seriously affected the beauty of the products. In order to overcome this disadvantage and improve the appearance quality of products, it is necessary to produce color gel coats without color difference for customers. It is very necessary to develop low styrene emission gel coat resin, and it has very important practical significance. At present, many new gel coat resins have been developed abroad.
At present, there are not many enterprises that can produce color gel coat in China. Ashland polyester (Kunshan) Co., Ltd. is the supplier of color gel coat in China {zd0}. In order to provide gel coat customers with faster and more timely services, Ashland company has launched insint rapid gel coat automatic production system all over the world (including Ashland polyester (Kunshan) Co., Ltd.), which can produce color gel for customers in a few minutes; Jinling DSM company introduces the eurotinter equipment of the automatic production line of color gel coat with full computer adjustment and color matching of {Zxj} all over the world with an annual output of 1000t from DSM headquarters (with gel coat factories all over the world), which is the fifth color gel coat production line of the equipment in the world; Jiangsu Fuling Chemical Co., Ltd. (formerly Jiangsu Fuli chemical) also introduced an advanced color gel coat production line with full computer adjustment and color matching from the Netherlands; Large state-owned enterprises Tianma Group (which has a great influence on the domestic FRP Industry) and Yida chemical (the gel coat manufacturer in {zd0} Taiwan, one of the main gel coat suppliers in Southeast Asia and Asia, and a wholly-owned enterprise in Taiwan) produce color gel coats. The color matching system adopts {Zxj} computer color comparison in the world, and then through personnel color matching, the color difference caused by different batches of color pastes can be {zd0} eliminated to a certain extent. Beianhe FRP factory produces characteristic color gel coat, which takes the lead.
The matrix of gel coat resin is unsaturated polyester resin (up), so most enterprises producing up produce gel coat resin. According to incomplete statistics, the annual sales volume of domestic gel coat in 2001 was about 20000 tons, including more than 3000 tons of color gel coat. In recent years, the annual sales volume of gel coat of various enterprises has increased by 10% ~ 30%, and the growth trend has not decreased. It can be seen that the gel coat market has great potential. Although the market prospect is very good and the competition is still very fierce, in order to gain a firm foothold in the industry, we need to have sufficient economic strength to occupy the market with high quality and low price, or have unique products. Although the annual sales volume of gel coat of beianhe FRP factory is not too large, its air-dried gel coat, radiation curing gel coat, and unbreakable mold gel coat occupy a {lx1} position in the industry and the profit is still considerable; An SMC color paste developed and produced by Yida chemical, which can withstand high temperature of 180 ℃ and has no color on the surface of the product. It has been successfully applied to Yuanda central air conditioner. Gel coat resin is a special resin for making gel coat layer of FRP products. Styrene is still the most suitable monomer for up resin. However, styrene has high vapor pressure at room temperature and is easy to volatilize, especially in FRP products made by hand paste or spray molding process, which is more volatile in the process of gel coat layer and backing reinforcement layer.