| Customization: | Available |
|---|---|
| CAS No.: | 9004-65-3 |
| Color: | Sub-White, White |
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HPMC is a highly pure cotton cellulose as raw material, under alkaline conditions by special etherification and preparation.White or whitish powder.HPMC decreases with the decrease of methoxide content, increase of gel point, decrease of water solubility and decrease of surface activity.
HPMC has thickening ability, salt resistance, low ash powder, pH stability, water retention, dimensional stability, excellent film forming, and a wide range of enzyme resistance, dispersion and adhesion.
In construction glue, instant hydroxypropyl methylcellulose (HPMC) must be used, because hydroxypropyl methylcellulose (HPMC) is only dispersed in water without real dissolution. About 2 minutes, the viscosity of the liquid gradually increases, forming a transparent viscous colloid.
Hot-melt products, when met with cold water, can disperse quickly in hot water and disappear in hot water. When the temperature drops to a certain temperature, the viscosity will slowly appear until it forms a transparent viscous colloid. The recommended amount of hydroxypropyl methylcellulose (HPMC) added to construction glue is 2-4kg.
Hydroxypropyl methylcellulose (HPMC) has stable chemical properties, mildew resistance, and good water retention in construction glue, and is not affected by changes in pH value. It can be used with a viscosity ranging from 100,000 S to 200,000 S. But in production, the higher the viscosity, the better. The viscosity is inversely proportional to the bond strength. The higher the viscosity, the smaller the strength. Generally, the viscosity of 100,000 S is suitable.
The problem of delamination of construction glue is a big problem encountered by customers. First of all, the problem of raw materials should be considered in the delamination of construction glue. The main reason for delamination of construction glue is polyvinyl alcohol (PVA) and hydroxypropyl methylcellulose (HPMC). caused by incompatibility. Secondly, it is because the stirring time is not enough; in addition, the thickening performance of the construction glue is not good.
Product Parameters
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| Product name | HPMC | ||
| content of methoxy | 28.0-30.0 27.0-30.0 19.0-24.0 | ||
| content of hydroxypropyl | 7.0-12.0 4.0-7.5 4.0-12.0 | ||
| temperature of gelation | 58-64 62-68 70-90 | ||
| moisture | ≤5% | ||
| Ash | ≤1% | ||
| PH Value | 4-8 | ||
| Apperance | Whie powder | ||
| Fitness | 80-100 list | ||
| Viscosity | 300-200,000 It can be custmized | ||
| Re HPMC increased with methoxy content reduce, the gel point water solubility and surface activity also declined. Depends on customers' situation | |||
1. We provide life-long after sale service.
2. We closely cooperate with experienced transportation agent, shipping companies/air lines (Like DHL, Fedex, TNT, EMS) to ensure the shortest shipping time at the latest available freight.
3. All enquiries and requests about our products will be replied within 24 hours except weekends and public holidays of China.
4. All problems faced by our customers will be taken and solved promptly.
FAQ
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1.Q:Are you a factory or trading company?
A:We are a factory and trading company.
2 Q: What documents you provide?
A: Usually, we provide Commercial Invoice, Packing List, Bill of loading, COA , Health certificate and Origin certificate.PLS let us know if your markets have any special requirements.
3 Q: What is loading port?
A: Our factory is nearby Tianjin Port, but loading port can be negotiated.
4 Q:What is the payment terms?
A: L/C ,T/T, PayPal.
5 Q:How can I get some samples?
A: Kindly send us your address, we are honored to offer you samples.
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