What are the factors affecting the water retention rate of hydroxypropyl methylcellulose?
What are the factors affecting the water retention rate of hydroxypropyl methylcellulose?
The water retention rate of hydroxypropyl methylcellulose
HPMC products is usually affected by the following factors:
1. Cellulose ether HPMC uniformity
The homogeneously reacted HPMC has a uniform distribution of methoxy and hydroxypropoxy groups and a high water retention rate.
2. Cellulose ether HPMC thermogel temperature
The thermal paste has a high temperature and a high water retention rate. On the contrary, the water retention rate is low.
3. Viscosity of cellulose ether HPMC
When the viscosity of HPMC increases, the water retention rate also increases; when the viscosity reaches a certain level, the increase in water retention rate tends to be gentle.
4 .Cellulose ether HPMC addtion
The larger the amount of cellulose ether HPMC added, the higher the water retention rate and the better the water retention effect.
In the range of 0.25-0.6%, the water retention rate increases rapidly with the addition amount; when the addition amount is further increased, the water retention rate increases slowly.
hydroxypropyl methylcellulose
