Hydroxypropyl Methylcellulose(hpmc)

La description

Description: 1&#****9;Molecular structure: n:degree of polymerization; R:-H,-CH3 or CH2CHOHCH3 2.Technical Index: Quality index Item Type (gelatification temperature) *0°C *5°C *5°C Methoxyl ****0% ****0% ****4% Hydroxypropyl ***2% **7.5% ***2% Gelatification temperature ****4 ****8 ****0 Moisture &#***4;5% Ash &#***4;1% PH(1% solution,*5°C) **8 Viscosity specification Type Specification Range, mpa.s special low viscosity 5 **7 *0 ***2 *5 ****8 low viscosity *5 ****0 *0 ****0 **0 *****0 high viscosity ***0 ********0 ****0 **********0 special high viscosity ****0 **********0 ****0 **********0 ****0 **********0 ****0 **********0 ****0 ********0 Note:2% aqueous solution at *0°C;*1% aqueous solution at *0°C 3.Property: (1)Appearance:white or off-white powder (2)Particle size:throughput efficiency of above *8.5% in **0 mesh,and **0% in *0 mesh. (3)Carbonization temperature:******0°C (4)Apparent density:xxxxx3(usually about 0.5g/cm3),specific gravity:1.***1.*1. (5)Color degradation temperature:******0°C (6)Surface tension:****6dyn/cn(2% aqueous solution) (7)Soluble in water and some organic solvents:its aqueous solution is of surface tension,high transparency and stable property.The solubility varies with the viscosity,the lower the viscosity is ,the higher solubility it has.The different HPMC is different is different in some properties and its solubility in water is not affected by PH. (8)The lower methoxyl content in HPMC,the higher gelatification temperature,the lower solubility in water and surface activity. (9)HPMC has also other characteristic such as thickening property.PH stability,water retention,excellent film-forming property and good disperse and adhesion power. 4.Usage: HPMC is mainly used as dispersant in the production of PVC and as thickener,stabilizer,emulsifier,excipient,water retention ag