- November 23, 2020
- Posted by: admin
- Category: News
1. The differences between hydroxypropyl methylcellulose and guar gum are as follows:
The viscosity of Hydroxypropyl Methyl Cellulose is not as high as that of guar gum, and the thickening effect is not as good as that of guar gum. Guar gum is severely agglomerated with water and is difficult to stir. Sodium carboxymethyl cellulose Agglomeration is not serious when exposed to water, guar gum is not resistant to high temperatures, and sodium carboxymethyl cellulose can withstand high temperatures below 220 degrees.
2. Hydroxypropyl methylcellulose
Hydroxypropyl methylcellulose, also known as hypromellose, cellulose hydroxypropyl methyl ether, is made of highly pure cotton cellulose as raw material, and is specially etherified under alkaline conditions be made of.
(1) Main purpose:
① Polyvinyl chloride: Used as a dispersant in the production of polyvinyl chloride, and is the main auxiliary agent for the preparation of PVC by suspension polymerization.
② Construction industry: As a water-retaining agent and retarder of cement mortar, it makes the mortar pumpable. Used as a binder in plaster, plaster, putty powder or other building materials to improve spreadability and prolong operation time. It can be used as a paste tile, marble, plastic decoration, paste enhancer, and can reduce the amount of cement. The water retention properties of HPMC prevent the slurry from cracking due to drying too fast after application, and enhance the strength after hardening.
③ Ceramic manufacturing industry: widely used as a binder in the manufacturing of ceramic products.
④ Paint industry: As a thickener, dispersant and stabilizer in the paint industry, it has good compatibility in water or organic solvents. As a paint remover.
⑤ Ink printing: As a thickener, dispersant and stabilizer in the ink industry, it has good compatibility in water or organic solvents.
⑥ Plastic: used as mold release agent, softener, lubricant, etc.
⑦ Pharmaceutical industry: coating materials, film materials, rate-controlling polymer materials for slow-release preparations, stabilizers, suspending agents, tablet binders, and viscosity-increasing agents.
⑧. Others: This product is also widely used in leather, paper products, fruit and vegetable preservation and textile industries