MAISI  Hydroxypropyl methylcellulose (HPMC) is a non-ionic cellulose ether polymer based on cellulose. Cellulose is a natural polymer extracted from refined cotton linter and provided as a free-flowing powder. Belonging to the cellulose ether group, HPMC is mainly used in building materials, such as tile adhesives and plasters, as rheological modifiers and water retaining agents. MAISI HPMC has good retention, and thickening property, Stable chemical properties effectively resist alkali attack.