The reason why the hydroxypropyl methylcellulose is more and more diluted in the putty powder?
When the putty powder is produced and used, various problems will occur. After the putty powder is mixed with water and stirred with an electric drill, the putty will become thinner as it is stirred, and the phenomenon of water separation will be serious. The root cause of this problem is the putty. Hydroxypropyl methylcellulose added to powder.
1. The viscosity of hydroxypropyl methylcellulose is not suitable, the viscosity is too low, and the suspension effect is not enough. At this time, the phenomenon of water separation will be serious, and the effect of uniform suspension cannot be reflected.
2. Hydroxypropyl methylcellulose water-retaining agent is added to the putty powder, which has a very good water-retaining effect. When the putty is dissolved in water, it locks a large amount of water. At this time, a lot of water is flocculated into water. The lump, with stirring, a lot of water is separated out, so there is a problem that the more you stir, the thinner it becomes; this is a common problem, and many people have encountered such a problem. The amount of cellulose added or the added moisture can be appropriately reduced.
3. Hydroxypropyl methylcellulose has a certain relationship with its own structure. It has thixotropy, so the whole coating has a certain thixotropy after adding cellulose, so when the putty is rapidly stirred, its overall structure Dispersed, it appears more and more thin, but when stationary, it slowly recovers.
Post time: Apr-28-2024