​Construction Grade Hydroxypropyl Methyl Cellulose Ethers HPMC

Construction Grade Hydroxypropyl Methyl Cellulose Ethers HPMC

CAS number: 9004-65-3

Molecular weight: 86000.00000

Physical Properties

Appearance and properties: white or off-white fibrous or granular powder
Density: 1.39 g/cm3
Solubility: almost insoluble in absolute ethanol, ether and acetone; swells into a clear or slightly cloudy colloidal solution in cold water
Stability: The solid is flammable and incompatible with strong oxidants.

Chemical Properties
1. Appearance: white or almost white powder.
2. Granularity; 100 mesh pass rate is greater than 98.5%; 80 mesh pass rate is 100%. Special specifications of particle size 40 ~ 60 mesh.
3. Carbonization temperature: 280-300℃
4. Apparent density: 0.25-0.70g/cm (usually around 0.5g/cm), specific gravity 1.26-1.31.
5. Discoloration temperature: 190-200℃
6. Surface tension: 2% aqueous solution is 42-56dyn/cm.
7. Solubility: soluble in water and some solvents, such as ethanol/water and propanol/water in appropriate proportions. The aqueous solution has surface activity. High transparency, stable performance, different specifications of products have different gel temperatures, solubility changes with viscosity, the lower the viscosity, the greater the solubility, the performance of different specifications of HPMC has a certain difference, the solubility of HPMC in water is not affected by pH.
8. As HPMC content decreases, gel point increases, water solubility decreases, and surface activity also decreases.
9. HPMC also has the characteristics of thickening ability, salt-tolerant low-ash powder, pH stability, water retention, dimensional stability, excellent film formation, and extensive enzyme resistance, dispersion and adhesion.

HPMC Hydroxypropyl MethylCellulose has thermal gelation properties, so after heating the aqueous solution will precipitate and form gels, and dissolve again after cooling. Products of different specifications have different gelling temperatures. Its solubility varies with the viscosity, and the lower the viscosity is, the greater the solubility will be. There are some differences in the properties of Hydroxypropyl MethylCellulose of different specifications. The dissolution of HPMC  Hydroxypropyl MethylCellulose in water is not affected by the pH value.

Specifications

Features
1.Stability
In the water-based paints, HPMC Hydroxypropyl Methyl Cellulose has excellent storage stability, maintains uniform viscosity, makes pigments uniformly dispersed, and basically won't be affected by the pH value.
2. Water-holding Property
In wall putty/ wall skim coat, the main roles of celluloses are water retention, adhesion, lubrication and so on. HPMC Hydroxypropyl Methyl Cellulose has high water-holding performance, surface opticity and improves uniformity. This helps to avoid crusting and off-powder phenomena, improve resistance to shrinkage, cracking and vertical flow, and to improve the work efficiency since the painting job is comfortable and saves effort.
3. Dispersibility
In the production of synthetic resin, HPMC Hydroxypropyl Methy lCellulose plays the role of protective colloidal agents and can effectively prevent polymeric particles from agglomerating.
4. Adhesion
In such materials as the adhesive mortar and surface mortar in the thermal mortar system, celluloses mainly plays a role of bonding, water retention and increasing strength. It also helps to improve construction, water-retaining property and resistance to hanging.
5. Thickening Property
In interface agents, HPMC Hydroxypropyl MethylCellulose mainly functions as the thickening agent and can increase the the tensile strength and flexural strength.
6. Constructability
In the bonding of tiles, tile adhesives , HPMC can function as water-retaining agent and adhesives, and can greatly improve construction performance of adhesives, allow longer opening hours and greater cohesion, and prevent falling of tiles due to excessive water loss.
Applications
Construction Mortar :  Ceramic Tile Mortar, Joint Filler, Wall Putty, Wall Skim Coat, Surface Mortar, Waterproof Mortar

Package

N.W.: 25±0.25kg / bag; Inner: PE plastic film bag, Outer: PP woven bag; 

PTMA-HPMC-H10,H15,H20 are best for C0,C1,C2 glue, for more information, please contact us !