1. The main application of hydroxypropyl methylcellulose
1. Construction industry: As a water-retaining agent and retarder of cement mortar, it can make the mortar pumpable. In plaster, gypsum, putty powder or other building materials as a binder to improve spreadability and prolong work time. It can be used as paste tile, marble, plastic decoration, paste reinforcement, and can also reduce the amount of cement. The water retention performance of hydroxypropyl methylcellulose HPMC prevents the slurry from cracking due to drying too fast after application, and enhances the strength after hardening.
2. Ceramic manufacturing industry: It is widely used as a binder in the manufacture of ceramic products.
3. Coating industry: It is used as a thickener, dispersant and stabilizer in the coating industry, and has good compatibility in water or organic solvents. As a paint remover.
4. Ink printing: It is used as a thickener, dispersant and stabilizer in the ink industry, and has good compatibility in water or organic solvents.
5. Plastic: used as forming release agent, softener, lubricant, etc.
6. Polyvinyl chloride: It is used as a dispersant in the production of polyvinyl chloride, and it is the main auxiliary agent for preparing PVC by suspension polymerization.
7. Others: This product is also widely used in leather, paper products, fruit and vegetable preservation and textile industries.
8. Pharmaceutical industry: coating materials; membrane materials; rate-controlling polymer materials for sustained-release preparations; stabilizers; suspending agents; tablet adhesives; viscosity-increasing agents
health hazard
Hydroxypropyl methylcellulose is safe and non-toxic, can be used as a food additive, has no heat, and has no irritation to the skin and mucous membranes. It is generally considered safe (FDA1985), with a daily allowable intake of 25mg/kg (FAO/WHO 1985), and protective equipment should be worn during operation.
Environmental impact of hydroxypropyl methylcellulose
Avoid random throwing of dust to cause air pollution.
Physical and chemical hazards: avoid contact with fire sources, and avoid forming a large amount of dust in a closed environment to prevent explosive hazards.