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| Packing: | Double bag, outer composite paper bag, inner polyethylene film bag, each bag net weight of 25 kg, can be customized. |
| Storage and shelf life: | In original packaging with a far high heat source, store in cool, dry conditions for 2 years. It is recommended to use this product on a first-in-first-out basis. |
Basic information
Hydroxypropyl methyl cellulose (HPMC) is a non-ionic cellulose ether prepared from natural polymer material through a series of chemical processing. It is an odorless, tasteless white or white-like powder
Physical and chemical properties
Where n is the degree of polymerization and R is -H, - CH3or - CH2CHOH CH3
CAS: 9004-65-3
EINECS: 618-389-6
Chemical Property
1、Appearance: White or white-like powder
2、Granularity: the passing rate is more than 98.5% for 100 mesh, 100% for 80 mesh and the special size is 40-60 mesh.
3、Carbonization temperature is 280-300 ℃.
4、Apparent density is 0.25-0.70g/cm(usually is about 0.5g/cm) and it is 1.26-1.31 in proportion.
5、Color change temperature is 190-200℃.
6、Surface tension: 42-56dyn/cm in 2% aqueous solution.
7、Solubility: Soluble in water and some solvents, such as appropriate proportion of ethanol/water, propanol/water, etc. Aqueous solution has surface activity. High transparency, stable performance, different specifications of the product gel temperature is different, the solubility changes with the viscosity, the lower the viscosity, the greater the solubility, the performance of different specifications of HPMC has a certain difference, HPMC dissolution in water is not affected by pH value.
8、The surface activity of HPMC decreases with the decrease of methoxy content, the increase of gel point, the decrease of water solubility and the decrease of water solubility.
9、HPMC also has thickening ability, salt resistance low ash powder, pH stability, water retention, dimensional stability, excellent film formation, as well as a wide range of enzyme resistance, dispersion and adhesion characteristics.
Technical index
| Methoxy content | 19-32 |
| Hydroxypropyl content | 4-12 |
| Gelation temperature | 59-75 |
| Water content | ≤ 5.0 |
| Ash content | ≤ 3.0 |
| PH value | 4.0－8.0 |
| Viscosity | 400-200000 |
Type and viscosity
| Type | Viscosity | Liquor | Test temperature |
| Edge-400 | 350-450 | 2% | 20℃ |
| Edge -5K | 4000-6000 | 2% | 20℃ |
| Edge -50K | 45000-65000 | 2% | 20℃ |
| Edge -75K | 70000-80000 | 2% | 20℃ |
| Edge -100K | 80001-100000 | 2% | 20℃ |
| Edge -130K | 100001-130000 | 2% | 20℃ |
| Edge -150K | 130001-150000 | 2% | 20℃ |
| Edge -200K | 170000-200000 | 2% | 20℃ |
Product Feature
Salt resistance: HPMC is a non-ionic cellulose ether, and is not a polyelectrolyte, so in the presence of metal salts or organic electrolytes, it is relatively stable in aqueous solutions, but excessive addition of electrolytes can cause gel and precipitation.
Surface activity: HPMC aqueous solutions have surface active functions and can be used as colloidal protectants, emulsifiers and dispersants.
Hot gel: When HPMC aqueous solution is heated to a certain temperature, it becomes opaque, gels, and forms precipitation, but when it is continuously cooled, it returns to the original solution state, and the temperature of this gel and precipitation mainly depends on their type, concentration and heating rate
Ph-stability: The viscosity of HPMC aqueous solutions is almost unaffected by acids or bases, and the PH value is relatively stable in the range of 3.0-11.0
Water retention: HPMC is an efficient water retention agent, which has a wide range of applications in ceramics, building materials and many other aspects.
Adhesion: HPMC as a high performance binder, used in pigment, paper, tobacco products and ceramic products.
Main Uses
Building materials industry:
As a water-retaining agent and retarding agent of cement mortar, mortar has pumpability. Apply mortar, plaster, putty powder or other building materials as adhesives to improve spreadability and extend operating time. Used to paste ceramic tile, marble, plastic decoration, paste enhancer, can also reduce the amount of cement. HPMC water retention performance makes the paste after application will not dry too fast and crack, enhance the strength after hardening.
Daily chemical washing industry:
Daily chemical products can play a good thickening effect and good transparency. It can also play a certain role in stabilizing and dispersing materials
Ceramics industry:
Widely used as adhesives in the manufacture of ceramic products.
Coating industry:
As a thickener, dispersant and stabilizer in the coating industry, it has a good compatibility in water or organic solvents. It can also be a paint stripper.
Ink printing industry:
As a thickener, dispersant and stabilizer in the ink industry, it has a good compatibility in water or organic solvents.
Plastics industry:
For forming release agent, softener, lubricant, etc.
Polyvinyl chloride:
As a dispersant in the production of polyvinyl chloride, it is the main auxiliary agent for the preparation of PVC by suspension polymerization.
Others:
This product is also widely used in leather, paper products industry, fruit and vegetable preservation and textile industry.
Advantage
High water retention: it plays the role of lubrication and bonding. It improves the resistance to shrinkage, can prevent the phenomenon of peeling powder, has the ability to pump, improve spreadability and extend the operable time.
High stability: it makes the film wear resistance and adhesion, and makes its PH stable.
High dispersion: it prevents the aggregation of polymerized particles, improves the stability of the resin and the dispersion of the particles.
High thickening: It adjusts the fluidity and film thickness of the coating, improves the uniformity and coverage of the coating.
High adhesion: it enhances the bonding force between the coating film and the substrate, reduces falling off, peeling.
High workability: it makes construction easier and reduces paint drying time.
High fall resistance: it is very important for vertical painting or hanging paint to reduce paint waste and uneven coating.
High buffering: it stabilizes the performance of the coating and prevents acid-base reactions or other undesirable changes in the coating.
High transparency: It can also play a certain role in stabilizing and dispersing materials.
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peter@hpmc-hec.com
