MHE096 - Low Viscosity Hydroxy propyl methyl cellulose

Hydroxypropyl Methyl Cellulose Property

Water solubility and thickening capacity: hydroxypropyl methylcellulose can dissolve in cold water to form a transparent viscous solution.
Salt resistance: hydroxypropyl methylcellulose is a non-ionic and non polymerized electrolyte, so it is relatively stable in the aqueous solution of metal salts or organic electrolytes.
Water retention: hydroxypropyl methylcellulose is hydrophilic and its aqueous solution is highly viscous. It is added to mortar, gypsum, paint and so on, in the products to maintain high water conservation role.
Low ash: hydroxypropyl methylcellulose is a nonionic type, which can be effectively refined by hot water washing during preparation, so its ash content is very low.
PH Stability: The viscosity of hydroxypropyl methyl cellulose aqueous solution in the PH3.0-11.0 range is relatively stable.
Surface activity: hydroxypropyl methylcellulose aqueous solution has the surface activity, causes it to have the Emulsification function, the protection colloid, and the relative stability. Hot gelation: When heated to a certain temperature above the water solution can become opaque, the formation of precipitation, so that the solution loses viscosity. But it cools and turns into the original solution state. The temperature of condensation and precipitation depends on the type of product, concentration of solution and heating rate.

Physico-chemical properties

Typical viscosity range of HuaMao® HPMC products with NDJ-1 rotary viscometer at 20℃ with 2% solution.

Type	Typical viscosity
040	3-9
067	10-20
079	20-30
096	40-60
114	80-120
148	300-800
153	400-600
165	700-900
180	1200-2000
205	3500-5500
222	7000-9000
227	9000-11000
237	13000-17000
244	18000-22000
261	35000-45000
271	55000-65000
277	65000-85000
284	85000-130000
294	130000-180000
301	180000-230000
307	＞230000

*The above specifications have grade that disperses in cold water, such as MHE 227S, ”S” stands for dispersing in cold water

Physico-chemical properties of MHE096

Item	Required Specifications	Test Result
Appearance	White free-flowing power	White free-flowing power
hydroxypropoxy(WT%)	7.0-12.0	7.28
Methoxy(WT%)	28.0-30.0	29.85
Residue on ignition (%)	≤1.5	≤1.20
Moisture Content (%)	≤5	3.27
pH	5.5-8.0	6.53
Bacterium	≤1000/g	≤500/g
Mold	≤100/g	≤50/g
Water Insoluble Substance	≤0.5%	≤0.25%
Escherichia	≤5/g	Not Detected
Viscosity	40-60	50
Gel Temperature(℃)	58.0-64.0
Heavy Metals (ppm)	≤20
Arsenic (ppm)	≤2.0

2 % solution; Brookfield, on dry basis,20℃

Customization

HuaMao® can customize according to customer demand, production of goods.
1. HuaMao® can customize the packaging according to the customer's requirements.
2. HuaMao® can produce HPMC which is the special technical index, according to the customer's demand.

Low viscosity hydroxyl cellulose has good water solubility, high transparency, good gel properties, strong fluidity and surface activity, and is widely used in pharmaceutical, petrochemical, construction, textile and electronics industries. The films such as cellulose ether have high mechanical strength, flexibility, heat resistance and cold resistance, and have good compatibility with various resins and plasticizers, and are good coating materials. However, the low viscosity hydroxypropyl methyl cellulose aqueous solution has a hot gel behavior, soluble in cold water, heat can form gel precipitation, cooling after the dissolution. This is significantly different from the normal natural polymer materials, such as starch, to form gels under cooling conditions. In the process of the change of hot gel, the viscosity of hydroxypropyl methyl cellulose solution changed greatly. The viscosity behavior is influenced by many factors. In this paper, the viscosity changes of low viscosity hydroxyl cellulose under varying conditions, such as temperature, pH, concentration, viscosity, and salinity are investigated, which are designed to provide the reference for the use of its viscidity properties in the field of production.