Hydroxypropyl methyl cellulose
Hypropyl methylcellulose (hypropyl mellose), also known as hydroxypropyl methylcellulose, is a kind of non-ionic cellulose mixed ether.
Appearance: white or white like fibrous or granular powder
Use: as thickener, dispersant, binder, extrander, oil resistant coating, filler, emulsifier and stabilizer in textile industry. Also widely used in synthetic resin, petrochemical, ceramics, paper, leather, medicine, food and cosmetics and other industries.
Main uses:
1, construction: as a water retaining agent of cement mortar, retarding agent to make mortar pumping. In the spread of mortar,lime, putty powder or other building materials as a binder, improve the spread and extend the operating time. Used as adhesive ceramic tile, marble, plastic decoration adhesive reinforcing agent, can also reduce the amount of cement. HPMC water retention properties so that the slurry after daub will not dry too fast and crack, enhance the strength of hardening.
2, ceramic manufacturing industry: widely used as adhesive in the manufacturing of ceramic products.
3, coating industry: in the coating industry as a thickener, dispersant and stabilizer, in water or organic solvents have good compatibility, as paint remover.
4, ink printing: in the ink industry as a thickener, dispersant and stabilizer, in water or organic solvents have good compatibility.
5, plastic: forming release agent, softener, lubricant, etc.
6, PVC: PVC production as dispersant, suspension polymerization preparation of PVC main additives.
7, pharmaceutical industry: coating materials; Membrane material; Rate-controlling polymer materials for sustained-release preparations; Stabilizing agent; Suspended aid; Tablet adhesive; tackifier
8, others: also widely used in leather, paper products industry, fruit and vegetable preservation and textile industry.
Dissolution method
1. All models can be added to the material by dry mixing method.
2, need to be directly added to the normal temperature aqueous solution, the best use of cold water dispersal type, after adding generally in 10-90 minutes to thicken.
3, ordinary model first with hot water stir dispersion, add cold water stir cooling can be dissolved.
4. If the phenomenon of agglomeration occurs when dissolving, it is because the stirring is not sufficient or the ordinary model is directly added to the cold water. At this time, it should be stirred quickly.
5. If bubbles are generated during dissolution, they can be removed by standing for 2-12 hours (the specific time depends on the consistency of the solution) or by means of vacuum pumping and pressure, or by adding an appropriate amount of defoaming agent.