Main uses of hydroxypropyl methylcellulose
1. Construction industry: used as a water retaining agent and retardant for cement mortar to make the mortar pumpable. Use mortar, plaster, putty or other building materials as a binder to improve spreadability and extend operating time. It is used as a pasting tile, marble, plastic decoration, pasting enhancer, and can also reduce the amount of cement. The water-retaining property of hydroxypropyl methylcellulose HPMC prevents the paste from drying too quickly and cracking when applied, and enhances the strength after hardening.
2. Ceramic manufacturing industry: widely used as adhesive in the manufacturing of ceramic products.
3. Coating industry: used as a thickener, dispersant and stabilizer in the coating industry, and has good compatibility in water or organic solvents. As a paint stripper.
4. Ink printing: used as thickener, dispersant and stabilizer in the ink industry, and has good compatibility in water or organic solvents.
5. Plastic: molding release agent, softener, lubricant, etc.
6. PVC: As a dispersant for PVC production and the main additive for the preparation of PVC by suspension polymerization.
7. Others: This product is also widely used in leather, paper products industry, fruit and vegetable preservation and textile industry, etc.
8. Pharmaceutical industry: coating materials; film materials; rate-controlling polymer materials for sustained-release preparations; stabilizers; suspension aid; tablet adhesives; increasing viscosity
health hazards
Hydroxypropyl methylcellulose is safe and non-toxic and can be used as a food additive. It does not generate heat and is non-irritating to skin and mucous membranes. A daily intake of 25 mg/kg (FAO/WHO 1985) is generally considered safe (FDA1985). Protective equipment should be worn during operation.
Environmental Impact of Hydroxypropyl Methylcellulose
Avoid random scattering of dust causing air pollution.
Physical and Chemical Hazards: Avoid contact with fire sources, avoid the formation of large amounts of dust in a closed environment, and prevent explosion hazards.