There are many types of thickeners currently available on the market, mainly including inorganic thickeners, celluloses, polyacrylates and associative polyurethane thickeners. Cellulose thickeners have a long history and many varieties, including methyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl methyl cellulose, etc., which was the mainstream of thickeners, One of the most commonly used is hydroxyethyl cellulose. Polyacrylate thickeners can basically be divided into two types: one is water-soluble polyacrylate; the other is acrylic acid, methacrylic acid homopolymer or copolymer emulsion thickener, this thickener It is acidic in itself, and it must be neutralized with alkali or ammonia to pH 8 ~ 9 to achieve the thickening effect, also known as acrylic acid alkali swelling thickener. Polyurethane thickener is an associative thickener newly developed in recent years. Inorganic thickeners are a class of thixotropic gel minerals that swell with water. There are mainly bentonite, attapulgite and aluminum silicate, among which bentonite is the most commonly used.
