Thickener, also known as gelling agent, is a substance that can increase the viscosity of latex and liquid, and is also called paste when used in food. Thickener can improve the viscosity of the system, keep the system in a uniform and stable suspended or turbid state, or form gel; Most thickeners have emulsifying effect. It can be divided into natural and synthetic categories. Most natural products are made from plants and seaweeds containing polysaccharide sticky substances, such as starch, Arabic gum, pectin, agar, gelatin, seaweed gum, carrageenan, dextrin, etc. General gelatin, soluble starch, polysaccharide derivatives, etc. can be used in cosmetics; Synthetic products include carboxymethyl cellulose, propylene glycol alginate, methylcellulose, sodium starch phosphate, sodium carboxymethyl cellulose, sodium alginate, casein, sodium polyacrylate, polyoxyethylene, polyvinylpyrrolidone and so on.
Thickeners are widely used in food (such as adding food additives to increase food viscosity or form gel in sauces, jam, ice cream, cans, etc.), cosmetics, detergents, latex, printing and dyeing, medicine, rubber, coatings, etc.
Thickener is a new type of functional polymer material developed rapidly in recent years, which is mainly used to improve the viscosity or consistency of products. It has the characteristics of small dosage, obvious thickening and convenient use, and is widely used in pharmaceutical, printing and dyeing, cosmetics, food additives, oil production, paper making, leather processing and other industries.
Industrial thickeners originated in the 20th century. In 1953, Coodrich Company first introduced the first synthetic thickener, polyacrylic acid thickener, into the market. In 1960s, foreign countries began to apply sodium polyacrylate to food. At present, W/O polyacrylic latex, as an aqueous thickener, has been widely used in textile printing paste, dyeing and finishing, industrial coatings and other fields.
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