HPMC(Hydroxypropyl methyl cellulose)
Hydroxypropyl Methyl Celluloseare types of non-ionic cellulose ether, which are a powder of white to off white color, that function as a thickener, binder, film-former, surfactant, protective colloid, lubricant, emulsifier and suspension and water retention aid. In addition, there types of cellulose ethers exhibit properties of thermal gelation, metabolic inertness, enzyme resistance, low odor and taste, and PH stability.    
Due to the myriad of properties, HPMC is often used to substitute many other additives with lower concentration, making HPMC an incredibly efficient and effective additive in area of adhesives, construction, foods, household products, pharmaceuticals and etc.

COMMON NAME	HYDROXYPROPYL METHYL CELLULOSE
ABBREVIATION	HPMC
CAS NO.	9004-65-3
STANDARDS COMPLIANT	ENTERPRISE STANDARD
CHEMICAL FORMULA	R=CH2CH(CH3)OH

PHYSICAL AND CHEMICAL PROPERTIES:
* Particle size: 98.5% passes through 100 mesh; 100% passes through 80 mesh.
* Charring temperature: 280-300ºC.
* Bulk density: 0.25-0.70 g/cm3 (Usually around 0.5 g/cm3 )
* Real specific gravity: 1.26-1.31.
* Browning temperature: 190-200ºC.
* Surface tension: (2% water solution) 42-56dyn.cm.
* Properties: Dissolved in water and some organic solvent such as ethanol. propyl alcohol. ethylene chloride, the water solution is of surface activity. It is a nonionic surface active agent. Gelation temperature is different for different grades. For example, among 60RT Hydroxypropyl Methylcellulose, 60 is gelation temperature, Namely, 2% water solution will form gelation at 60%
.

INDEX	UNIT	TECHNICAL INDICATIONS
		60SLO SERIES	75SLO SERIES
HYDROXYPROPYL	%	7.0-12.0	4.0-12.0
		0.2-0.3 (DS)	0.1-0.3 (DS)
METHOXY	%	28.0-32.0	19.0-24.0
		1.8-2.0 (DS)	1.1-1.6 (DS)
WATER	%	5.0 MAX	5.0 MAX
PARTICLE SIZE	%	90% THROUGH 250μm (ASTM MESH NO. 60) 80% THROUGH 125μm (ASTM MESH NO. 120) 80% THROUGH 106μm (ASTMMESH NO. 140)
VISCOSITY (2% SOLUTION NDJ)	MPA.S	5-200000
GELLING TEMPERATURE	ºC	56-64	68-90
LIGHT TRANSMITTANCE	%	70 MIN	70 MIN
WHITENESS	%	75 MIN	75 MIN
PACKING DENSITY	G/L	370-420
APPEARANCE		WHITE OR ALMOST WHITE POWDER