Construction grade HPMC & HEMC in building materials
July 26th 2024
When you produce and use putty, there will be various problems. Today we are talking to you that after you mix the putty powder with water, when you stir it with an electric drill, the putty will become thinner and the water will separate. Seriously, the root cause of this problem is the hydroxypropyl methyl cellulose added in the putty powder. Let us understand the principle of action together.
1.The selected viscosity of hydroxypropyl methylcellulose is inappropriate, the viscosity is too low, and the suspension effect is not enough.At this time, the water separation phenomenon will be serious and the uniform suspension effect will not be reflected.
2. This kind of water retention agent is added to putty powder, which has a very good water retention effect. When the putty and water dissolve, it locks a large amount of water. At this time, a lot of water is flocculated into water masses. , A lot of water is separated, so the problem appears as the more it is stirred, the thinner it becomes. This is a common problem, and many people have encountered such problems. You can appropriately reduce the amount of cellulose added or reduce the added moisture.
3. It also has a certain relationship with the structure of hpmc itself. It has thixotropy, so after adding cellulose, the entire coating has a certain thixotropy, so when the putty is quickly stirred, its overall structure is dispersed and appears The phenomenon of becoming more and more rare, but when it is still, it slowly recovers.
Our company’s cellulose not only has good water retention, but also has a good suspension effect, and the appropriate viscosity can be selected. It also has an anti-separation effect.
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