(1). Suspension polymerization In synthetic rubber production, such as polrvinyl chloride (PVC) polyvinylidene chloride and other copolymers, suspension polymerization is the most used process and hydrophobic monomer must stably suspend in water. As a water-soluble polymer, HPMC has excellent surface activity, which can be used as colloid protecting agent and prevent polymer particles from condensation.Moreover; HPMC is water-soluble polymer, but it is also slightly soluble in hydrophobic monomer and increases porous of monomer for polymer particles production, so it can provide a capability of polymers to remove residual monomer and improve absorption plasticizer (2). For the prescription of construction material, it can be used 1) binding agent and joint mixture of gypsum-based adhesive tape; 2) cement-base tiles & bricks and basic bonding 3) gypsum plate-based stucco; 4) cement-based stucco constructure; 5) the formulas of paint and paint remover. 3.The characteristics of the product (1).Salt resistance: HPMC is non-ionic cellulose ether, not polyelectrolyte, so it is relatively stable in aqueous solutions when metal salt or organic electrolyte is available, but excessive electrolyte can produce gel and sediment. (2).Surface activity: HPMC solution has the function of surface activity, which can be used as colloid protecting agent, emulsifying agent and dispersant. (3). Thermal gelation: HPMC solution can become .opaque and produce gel and sediment when it is heated to a certain temperature,but it will be restored to its initial solution state during continuous cooling. The temperature that forms gel and sediment mainly depends on its type, concentration and heating rate. (4). PH stability: acid or alkaline conditions almost cannot affect the viscosity of HPMC solution, and PH value is relatively stable in the range of 3.0-11.0 (5). Water retentivity: HPMC is a kind of water preserving agent with high efficiency. It is widely used in ceramics, building material and many other aspects. (6). Cohesiveness: as a king of cementing material with high property, HPMC is used for paint, paper making, tobacco products and ceramics products.