Views: 1 Author: Site Editor Publish Time: 2022-06-07 Origin: Site
【 Physical and chemical properties 】
1, appearance: white or white powder.
2, particle size; The pass rate of 100 mesh was more than 98.5%. The pass rate of 80 mesh is more than 100%.
3, carbonization temperature: 280--300℃
4, apparent density: 0.25--0.70/cm3(usually about 0.5g/cm3), specific gravity 1.26-1.31.
5, color change temperature: 190--200℃
6. Surface tension: 42-56DYn /cm for 2% aqueous solution.
7, soluble in water and some solvents, such as appropriate proportion of ethanol/water, propanol/water, trichloroethane, etc.
Aqueous solution has surface activity. High transparency, stable performance, different specifications of the product gel temperature
Different, solubility changes with the viscosity, the lower the viscosity, the greater the solubility, different specifications of HPMC
The solubility of HPMC in water is not affected by PH value.
8. The surface activity of HPMC also decreases with the decrease of methoxyl content, the increase of gel point 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 forming, as well as a wide range of enzyme resistance, dispersity and adhesion properties. The product combines a lot of physics and chemistry
(1) water solubility
The product can be dissolved in water in various fractions, the maximum concentration of which is limited only by viscosity.
(2) organic solubility
The product is soluble in partial organic solvents, such as appropriate proportions of ethanol/water, propanol/water, dichloroethane and two organic solvents solvent system.
(3) non-ionic inertia
The product is a non-ionic cellulose ether, and does not combine with metal salts or other ions to generate insoluble precipitation.
(4) Thermal gelation
The solution of the product must be heated to form a gel, which becomes a solution again when cooled.
(5) Surface activity
Provides surface activity in solution, achieves required emulsification and protective colloid, and phase stabilization.
It prevents solid particles from settling and thus inhibits the formation of precipitate.
(7) Protective colloid
Prevents droplets and particles from coalescing or condensing.
Used as adhesives for pigments, tobacco products and paper products, with excellent functions.
(9) Water retention
It can be in the wall cement board, brick and other porous surface, can maintain moisture.
(10) film formation
It can form transparent, tough and soft film with excellent oil resistance.
(11) Acid-base stability
Suitable for use in ph 3.0-11.0 range.
(12) tasteless and odourless, not affected by metabolism.
Used as food and drug additives, they will not be metabolized in food, will not provide heat HPMC can be used as a thickener, dispersant, emulsifier and film forming agent. Its industrial grade products can be used in daily chemicals, electronics, synthetic resins, construction and coatings.