1. Current domestic production capacity and demand for hydroxyethyl cellulose
1.1 Product Introduction
Hydroxyethyl cellulose (referred to as hydroxyethyl cellulose) is an important hydroxyalkyl cellulose, which was successfully prepared by Hubert in 1920 and is also a water-soluble cellulose ether with a large production volume in the world. Only this is the largest and rapidly developing important cellulose ether after CMC and HPMC. Hydroxyethyl cellulose is a non-ionic water-soluble polymer obtained by a series of chemical processing of refined cotton (or wood pulp). It is a white, odorless, tasteless powdery or granular solid substance.
1.2 World production capacity and demand
At present, the world’s largest hydroxyethyl cellulose production companies are concentrated in foreign countries. Among them, several companies such as Hercules and Dow in the United States have the strongest production capacity, followed by the United Kingdom, Japan, the Netherlands, Germany and Russia. It is estimated that the global production capacity of hydroxyethyl cellulose in 2013 will be 160,000 tons, with an average annual growth rate of 2.7%.
1.3 China’s production capacity and demand
At present, the domestic statistical production capacity of hydroxyethyl cellulose is 13,000 tons. Except for a few manufacturers, the rest are mostly modified and compounded products, which are not hydroxyethyl cellulose in the true sense. They mainly face the third-tier market. Domestic pure hydroxyethyl cellulose The output of base cellulose is less than 3,000 tons per year, and the current domestic market capacity is 10,000 tons per year, of which more than 70% are imported or provided by foreign-funded enterprises. The main foreign manufacturers are Yakuolong Company, Dow Company, Klein Company, AkzoNobel Company; domestic hydroxyethyl cellulose product manufacturers mainly include North Cellulose, Shandong Yinying, Yixing Hongbo, Wuxi Sanyou, Hubei Xiangtai, Yangzhou Zhiwei, etc. The domestic hydroxyethyl cellulose market is mainly used in coatings and daily chemical industries, and more than 70% of the market share is occupied by foreign products. Part of the textile, resin and ink markets. There is an obvious quality gap between domestic and foreign products. The domestic high-end market of hydroxyethyl is basically monopolized by foreign products, and the domestic products are basically in the middle and low-end market. Use in combination to reduce risk.
The demand for hydroxyethyl cellulose market is based on the region, the Pearl River Delta (South China) is the first; followed by the Yangtze River Delta (East China); thirdly, the Southwest and North China; the top 12 latex coatings Except for Nippon Paint and Zijinhua, which are headquartered in Shanghai, the rest are basically located in the South China area. The distribution of daily chemical enterprises is also mainly in South China and East China.
Judging from the downstream production capacity, paint is the industry with the largest consumption of hydroxyethyl cellulose, followed by daily chemicals, and thirdly, oil, and other industries consume very little.
Domestic supply and demand of hydroxyethyl cellulose: overall supply and demand balance, high-quality hydroxyethyl cellulose is slightly out of stock, and lower-end engineering coating grade hydroxyethyl cellulose, petroleum-grade hydroxyethyl cellulose, and modified hydroxyethyl cellulose Cellulose is mainly supplied by domestic enterprises. 70% of the total domestic hydroxyethyl cellulose market is occupied by foreign high-end hydroxyethyl cellulose.
Properties and uses of 2-hydroxyethyl cellulose
2.1 Properties of hydroxyethyl cellulose
The main properties of hydroxyethyl cellulose are that it is soluble in cold water and hot water, and has no gelling properties. It has a wide range of substitution degree, solubility and viscosity. precipitation. Hydroxyethyl cellulose solution can form a transparent film, and has the characteristics of non-ionic type that does not interact with ions and has good compatibility.
①High temperature and water solubility: Compared with methyl cellulose (MC), which is only soluble in cold water, hydroxyethyl cellulose can be dissolved in hot water or cold water. Wide range of solubility and viscosity characteristics, and non-thermal gelation;
②Salt resistance: Due to its non-ionic type, it can coexist with other water-soluble polymers, surfactants and salts in a wide range. Therefore, compared with ionic carboxymethyl cellulose (CMC), hydroxyethyl cellulose has better salt resistance.
③Water retention, leveling, film-forming: its water-retention capacity is twice that of methyl cellulose, with excellent flow regulation and excellent film-forming, fluid loss reduction, miscibility, protective colloid sex.
2.2 Use of hydroxyethyl cellulose
Hydroxyethyl cellulose is a non-ionic water-soluble cellulose ether product, widely used in architectural coatings, petroleum, polymer polymerization, medicine, daily use, paper and ink, fabrics, ceramics, construction, agriculture and other industries. It has the functions of thickening, bonding, emulsifying, dispersing and stabilizing, and can retain water, form a film and provide protective colloid effect. It is easily soluble in cold water and hot water, and can provide a solution with a wide range of viscosity. One of the faster cellulose ethers.
1) Latex paint
Hydroxyethyl cellulose is the most commonly used thickener in latex coatings. In addition to thickening latex coatings, it can also emulsify, disperse, stabilize and retain water. It is characterized by remarkable thickening effect, good color development, film-forming property and storage stability. Hydroxyethyl cellulose is a non-ionic cellulose derivative that can be used in a wide pH range. It has good compatibility with other materials in the component (such as pigments, additives, fillers and salts). Coatings thickened with hydroxyethyl cellulose have good rheology at various shear rates and are pseudoplastic. Construction methods such as brushing, roller coating, and spraying can be used. Good construction, not easy to drip, sag and splash, and good leveling.
Post time: Nov-11-2022