Whats we should know about Hydroxypropyl Methyl Cellulose
How many types of HPMC are there?
HPMC can be divided into quick-soluble type and hot-soluble type.
The instant soluble type disperses rapidly in cold water and disappears in water. At this time, the liquid has no viscosity, because HPMC is only dispersed in water, not really dissolved. After about 2 minutes, the viscosity of the liquid gradually increases and forms a transparent viscous gel. It can be used in a wide range of applications, including putty powders and mortars, as well as liquid glues and coatings.
Heat-soluble type, in the case of cold water, can be quickly dispersed in hot water and disappears in hot water. When the temperature drops to a certain temperature, it gradually appears viscous until it forms a transparent sticky colloid. Hot soluble type can only be used in putty powder and mortar. In liquid glues and paints it will appear caking and cannot be used.
What is the content of HPMC in putty powder?
The amount of HPMC used in practice varies depending on the climate, temperature, quality of the local calcium ash, formulation of the putty powder, "quality required by the customer". Generally speaking, it is between 4 kg and 5 kg.