What is the difference between hydroxypropyl methylcellulose (HPMC) without S?

1. HPMC is divided into fast-dissolving and slow-dissolving types.

The HPMC instant solubility is suffix with the letter S, such as 100000S for 100,000 viscosity fast-dissolving HPMC, which is treat with glyoxal in the production process.

The HPMC slowly soluble type does not contain any letters, such as 100000 is 100,000 viscosity-dissolving HPMC.

2. With or without S, the characteristics are different

The fast-dissolving HPMC disperses rapidly in cold water and disappears into the water. At this time, the liquid has no viscosity. Because HPMC is only dispersed in water, there is no real dissolution. After about two minutes, the viscosity of the liquid gradually becomes larger, forming a transparent thick. colloid.

The slow-dissolving HPMC, in the case of cold water, can be rapidly dispersed in hot water of about 70 ° C. When the temperature drops to a certain temperature, the viscosity gradually appears until a transparent viscous colloid is formed.

3. With or without S, different uses

Slow-dissolving HPMC can only be use in putty powder and mortar. In liquid glues and coatings and detergents, clumping can occur and cannot be used.

The fast-dissolving HPMC has a wide range of applications and can be use in putty powder, mortar, liquid glue, paint and detergent. There is no contraindication.