| Home | About Us | Products | Contact |

Hydroxy Propyl Methyl Cellulose (HPMC)

I.Name and Composition

      Hydroxy propyl methyl cellulose (HPMC)

III.Property and Performance
1. Physical and Chemical Property
Appearance:white or wihite powder
Granular Size:over 98.5% through 100mesh, 100% through 80 mesh
Specific Weight: 1.26-1.31
Apparent Density:0.25-0.70g/cm (usually around 0.5g/cm)
Surface Tension (2% water solution):42-56dyn/cm
Carbonization Temperature:280-300°C
Softenning Point:240°C
Melting Point:260°C
 

2.Application Performance
(1)Water Solubility Soluble in water in any proportion, the highest density depends on viscositiy, and solution does not be effected by PHvalue.
(2)Solubillity in Organic Solvent Tyrocell can dissolve in some organic solvents or organic aqueous solutions such as athylidene chloride, alcohol ones.
(3)Heat Delling When their aqueous solutions are heated to a certain temperature, reversible reaction may occur, but its fast gelling can be controlled.
(4)Non-ion Elektric Charge Tyrocell is non-ion cellulose ether, does not complex with metal ions or result in insoluble precipitations.
(5)Tihickening lts water solution provides thickening effect which has to do with viscosity, density and system.
(6)Water-holding Tyrocell or its solution can absorb and hold moisture.
(7)Film-forming Tyrocell can be made into smooth, tough and elastic film which offers excellent oil resistance and antioxidancy.
(8)Anti-enzyme Tyrocell and its solution have good resistance to enzyme,and ofter good viscosity stability.
(9)PH Stability Tyrocell is stable in acid alkali, no effect within PH 3-11.
(10)Surface Tension Tyrocell in solution provides surface activity, playing a role of emulsification and protection of gels.
(11)I-lnertness of Metabolism Used as additive of food and medicine, it is non-nutritious, heatless, does not change metabolism.
(12)Dispersiveness Tyrocell can reduce interface tension, making dispersive phases disperse to size-suitagle granules.
(13)Coherence Can be used as pigment, adhesive agent for paper, also used in coating and cohesive auxiliary material.
(14)Lubricity Can be used for rubber, asbestos, cement and ceramics to reduce friction and improve the pumping-adaptability of cement slurry.
(15)Suspension-Asistance Can prevet solid granules from setting down
(16)Emulsification Owing to reducing surface tension, iy can stabilize emulsion.
(17)Protection of Gels A protective layer forms on the surface of the dispersed drops, which prevents drops from agglomerating, thus stabilizing gels.
 

IV.Main Usage
Tyrocell is used in industry mainly as disperser to enhance suspension and prevent agglomeration of drops, owing to its excellent dispersing and gel-prodection capability, regular, uniform, apparent-specific-weight-suitable and well-workable granules are achieved.In building construction it is used for brick laying, wall rendering, inlaying wall seams, it is suitable for dry-blending and pre-blending cement slurry and conducive to thickening, water-holding and coherence enhances adaptability to pump slurry.ln decorative construction it is used to stick up tiles and margle with hing cohesive strength, at the same time iy can decrease cement consumption.It also used for plastering with good workbility and without cracking.Used in colorful ceramic glaze as suspension agent, it makes pigment disperse uniform in glaze and thicken coated layer duae to the gelling festure.lt also finds wide applications as the agent of thickening, coherence moistore-holding, flim-forming, stabilizing, emulsification, shabing etc. in petrochemicals, building, printing& dyeing, tobacco, daily-use chemicals, paper-making, leather, agriculture and forestry and others.

V.Method of Use
1. Fast Dissolving
When being stirred, Tyrocell can dissolve in water and some organic solvents, if fast dissolving is needded, the following method is proposed:
(1) Heat the required water to over 85°C, gradually put it in while stirring, cellulose dispersing in water, swelling into slurry.Stir and cool it down until it takes on transparency which indicates full being dissolved.
(2) Heat half the water to over 85°C, put it in while stirring until it becomes slurry, then put in the residual cool water and stir it until transparency.
2. Prepare Gruel-like Mother Liquor for Use
First prepare Tyrocell into hing thick gruel-like mother liquor (the same method as above), when used, supplement adequate cool water and continuously stir until transparence.
3. Dry-Blending
Tyrocell owns excellent compatibility, so it can be easily mixed dry with cement, plaster powder, pigment etc.a good effect can be obtained.
 

VI.Packing and Storage
20kg or 25kg net weight in carton drum plastic-coated or paper-plastic compound bag lined with 2 inner PE bags.On storage avoid sunshine and rain, prevent fire and wet.
 

2006-Netyapim.com