Hydroxypropyl Methyl Cellulose,HPMC

Hydroxypropyl Methyl Cellulose HPMC

HPMC is a highly pure cotton cellulose as raw material, under alkaline conditions by special etherification and preparation.White or whitish powder.HPMC decreases with the decrease of methoxide content, increase of gel point, decrease of water solubility and decrease of surface activity.
HPMC has thickening ability, salt resistance, low ash powder, pH stability, water retention, dimensional stability, excellent film forming, and a wide range of enzyme resistance, dispersion and adhesion.
 

1. Appearance		Milky white or white powder
2.Viscosity		100000mpa.s ~200000mpa.s
3.Gelling temperature, °C		55℃ - 80℃
4.Water (Wt%)		≤ 5.0
5.Ash (Wt%)		≤ 2.5
6.PH value		5.0 - 8.5
7.Purity/Solid content		99.8 %
8.Fineness/Particle size		100 mesh pass rate is greater than 98.8%;80 mesh pass rate 99.9%;The particle size of special specification is 40-60 mes
9.Solubility		soluble in water and some solvents, such as appropriate proportion of ethanol/water, propanol/water.The aqueous solution has surface activity, high transparency and stable performance.

Products Parameter

Specifications	Viscosity Range Mpa.s	Specifications	Viscosity Range Mpa.s
5	3-9	8000	7000-9000
15	10-20	10000	9000-11000
25	20-30	20000	15000-25000
50	40-60	40000	35000-45000
100	80-120	60000	46000-65000
400	300-500	80000	66000-84000
800	700-900	100000	85000-120000
1500	1200-2000	150000	130000-180000
4000	3500-4500	200000	≥180000

 

HPMC is widely used in building materials, coating, synthetic resin, ceramics, medicine, food, textile, agriculture, cosmetics, tobacco and other industries.HPMC by use can be divided into: construction grade, food grade and medical grade.At present homebrew is building level mostly, in building level, be bored with child pink dosage is very big, about 90% is to use be bored with child pink, the rest is to use make cement mortar and glue
 

Construction industry

1.Used as a binder in plaster, gypsum, putty powder, mortar or other building materials to improve processability and extend operating time. Prevents the slurry from drying and cracking too quickly after spraying, and the strength is enhanced after hardening.
2.Used as a tackifier for tiles, marble and plastic finishes.
Ceramic industry
Ceramic industry: widely used as a binder in the manufacture of ceramic products.
Coating industry
1.Used as a thickener, dispersant and stabilizer in the coatings industry. Good compatibility with water or organic solvents.
2.Used as paint stripper, dispersion coating, wall coating, polymerization aid.

we established in in 2008 , we specialize in manfacture hydroxypropyl methylcellulose (HPMC) and Redispersible Polymer Powder(RDP) for many years , our company covers an area of 120 acres, now has 280 employees, including 28 senior technicians. Now the company has a non-ionic hpmc cellulose ether production line whose annual yield is 18000 tons and 15000 tons of redispersible polymer powder per year , today our products cover 30% of the domestic market , and we have established long term business relationship with many countries .
our product are widely used in the construction industrials , such as cement motar , tile adhesive, wall putty, wall panel & Block Jointing and the daily chemicals. It has the advantages of water retention, easy construction, and smooth wall formed.

http://www.hpmccelluloseether.com/hydroxypropyl-methylcellulose/hydroxypropyl-methyl-cellulose-hpmc.html

Hydroxypropyl MethylCellulose

Hydroxypropyl Methyl Cellulose
Other Name: Cellulose hydroxy propyl methyl ether; Hypromellose, Cellulose, 2-hydroxypropyl Methyl ether. Cellulose hydroxypropyl methyl ether Hyprolose；

CAS:9004-65-3

Hydroxypropyl Methyl Cellulose (HPMC) is also named as MHPC, are 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, these types of cellulose ethers exhibit properties of thermal gelation, metabolic inertness, enzyme resistance, low odor and taste, and pH stability. HPMC are widely used in construction,pharmaceutical,food,cosmetic,detergent,paints,textiles etc.We can provide the general grade HPMC, we also designed the modified HPMC according to customer requirements. After modified, we can get the product which have long open time, good anti-sagging,good workability etc.

Application

Tile Adhesive
1,Good water retention:  it can prolonged opening time , to make tiling more efficient
2,Improved adhesion and sliding resistance especially for heavy tiles
3,Better work-ability: lubricity and plasticity of plaster is ensured, mortar can be applied easier and quicker

Cement Based Plaster

1,Easy dry mix formulation due to cold water solubility: lump formation can be easily avoided, ideal for heavy tiles.
2,Good water retention: prevention of fluid loss to the substrates, the appropriate water content is kept in mixture which guarantees longer concreting time
3,Increased water demand: increased open time, expanded spry area and more economical formulation
4,Easier spreading and improved sagging resistance due to improved consistency

Exterior Heat Insulation System ( EIFS )

1,Improved adhesion
2,Good wetting ability for EPS board and substrate
3,Reduced air entrainment and water uptake.

Self-leveling

1,Protection from water exudation and material sedimentation
2,No effect on slurry fluidity with low viscosity HPMC, while its water retention characteristics improve the finish performance on the surface.

Crack Filler

1,Better workability: proper thickness and plasticity
2,Water retention ensures prolonged work time
3,Sag resistance: improved mortar bonding ability

Gypsum Based Plaster

1,Water retention: maximized water content in slurry ensures complete gypsum concretion.
2,Anti-sagging: when spreading a thicker coat corrugation can be avoided ( careful when air is entrained )
3,Increased mortar yield: depending on the weight of the dry mixture and appropriate formulation HPMC can increase the mortar

Ceramic Extrusion

1,Excellent workability for ceramic molding due to lubricity and plasticity
2,Compact texture and smooth surface of ceramic product due to negligible ash content

http://www.hpmccelluloseether.com

hpmc

Name: Hydroxypropyl MethylCellulose(HPMC、MHPC)
Other Name: Cellulose hydroxy propyl methyl ether; Hypromellose, Cellulose, 2-hydroxypropyl Methyl ether. Cellulose hydroxypropyl methyl ether Hyprolose；
CAS Registry Number：[ 9004-65-3]

Hydroxypropyl Methyl Cellulose (HPMC) is non-ionic cellulose ether made from natural cotton fiber under series of chemical processing. It’s odorless, tasteless and non-toxic white powder, can be dissolved in cold water to form a transparent viscous solution with the properties of thickening, binding, dispersing, emulsifying, film coating, suspending, absorbing, gelling, water retention and colloid protection.


Physical Properties:
1. Appearance: HPMC is a nonionic cellulose ether, white grayish-white powder or granule，odorless and flavorless, soluble in cold water, glacial acetic acid, ethanol, methanol and propylene glycol, slightly soluble in acetone depending on the degree of substitutions, practically insoluble in hot water, ethylene glycol and toluene. HPMC is dissolved in a mixture of 10% methanol and 90% methylene chloride to form colloidal solutions.
2. The solution of HPMC has surface activity, high transparency, and stable performance. When heated at certain temperature, the solution becomes cloudy or forms flocculent gel. However, the solution becomes clear again after cooling. Different types of HPMC have different gelation temperatures. The solubility varies with the viscosity. The lower the viscosity, the higher solubility it has. The different types of HPMC are different in some properties and their solubility in water is not affected by pH.
3. Particle sizes：100% pass rate in 100 mesh.
4. Apparent density：0.25-0.70 g/mL (usually about 0.5 g/mL)，specific density 1.26-1.31mL.
5. Color change temperature：190-200℃; Carbonization temperature：280-300℃.
6. Surface tension：42-56 dyn/cm (2% aqueous solution).
7. The higher methoxy content in HPMC, the lower gelation temperature, and the higher solubility in water and surface activity.
8. HPMC has some other characteristics, for example, thickening property, pH stability, retention of water, excellent film-forming property, good disperse and adhesion ability.

Types	Viscosity (Brookfield, mPa.s, 2%)	Viscosity (NDJ-1, mPa.s, 2%)
HPMC	320-480	320-480
HPMC	10000	10000
HPMC	20000	40000
HPMC	35000	75000
HPMC	40000-55000	80000-120000
HPMC	55000-65000	120000-180000
HPMC	Min65000	160000-240000
HPMC	4000	4000
HPMC	24000-36000	48000-72000
HPMC	40000-55000	80000-120000
HPMC	55000-65000	120000-180000
HPMC	Min65000	160000-240000

Application:
1. Architecture industry
A. HPMC is used as water-retaining-agent in all kinds of compo materials, such as mortar, plaster, putty powder and other adhesive materials. It enhances the spread ability and the pump ability, lengthens the operable time of the wet materials.
B. HPMC is used as adhesive for tiles, marbles, plastic ornaments and plaster tone. It also reduces the dosage of cement.
C. The water retention property of HPMC leads the pulp not to dry too quickly, avoids crackings after spreading, and enhances the intensity of the coating.
2. Paint industry
HPMC is used in paint industry as thickening agents, dispersing agents and stabilizers. It has good intermiscibility with water or organic solvents.
3. Printing and ink printing
HPMC is used in printing ink industry as thickening agents, dispersants and stabilizers.
4. Plastic industry
HPMC is used in plastic industry for forming release agents, softeners, lubricants and so on.
5. Others:
HPMC is also widely used in the leather and paper industries, fruit and vegetable fresh-maintaining and textile industry and so on.

http://www.hpmccelluloseether.com/hpmc/hpmc.html

Hydroxy Propyl Methyl Cellulose Pharmaceutical and Food Industries

Just like other cellulose ethers, Hydroxy Propyl Methyl Cellulose is non-toxic and harmless and approved as additives by the food, drug and cosmetics regulations of all the countries.

In medicine, Hydroxy Propyl Methyl Cellulose hpmc cellulose can be used in various dosage forms. In tablets, pills, powders, liquid, emulsions, suspensions, and paste, it can be used as binding, thickening, separating, releasing, stabilizing and emulsifying agents.

Its application in medicine is characterized as follows.

1. Hydroxy Propyl Methyl Cellulose has bonding and film-forming properties as well as thickening and dispersion effects in the liquids. Furthermore, it is of no nutritional value, so won’t make metabolic changes. It is also activated in fat. Consequently, it is widely used in medicine.

2. Hydroxy Propyl Methyl Cellulose has dump-proof as well as mildew-proof functions, and can improve the hardness, strength and elasticity of tablets. In food, it can be applied to sweets and cakes, and it can prevent grease penetrating and retain moisture, in addition to dump-proof as well as mildew-proof functions.

3. Hydroxy Propyl Methyl Cellulose is a non-ionic mixed cellulose ether, so its solution has no ionic charge, and does not react with metal salts or ionic compounds. It will not affect the efficacy.

4. Hydroxy Propyl Methyl Cellulose has strong enzyme resistance, which will be enhanced with the increase of degree of substitution. So it has great advantages for storage of made drugs over other sugar and starch products, and can also reduce the possibility of going moldy.

5. Hydroxy Propyl Methyl Cellulose is metabolically inert, so as pharmaceutical excipients, it won’t be metabolized or absorbed. In food, it does not provide heat, so it has peculiar usability on the food of low calorific value, no salt, no change in immunogenicity suitable for people with diabetes.

6. Hydroxy Propyl Methyl Cellulose has stability to acids and bases. However, if the pH value is beyond the range of 2-11, its viscosity will be reduced at high temperatures or stored for a long time.

7. Hydroxy Propyl Methyl Cellulose aqueous solution has surface activity, belongs to non-ionic surface-active agents, and can exhibit moderate surface tension and interfacial tension values. In the two-phase system, it has an effective emulsification effect , so can be used as an effective stabilizer and protective colloid agent.

8. Hydroxy Propyl Methyl Cellulose solution has excellent film-forming performance and can provide good conditions for tablets, pills and coating. The mold formed has such characteristics as being colorless, transparent and tough. If added with glycerin, its flexibility can be increased. When it is used as film coating materials, depending on the viscosity grade type, the content range is 2% to 10%, low viscosity, high concentration of the coating solution film products that do washed, high viscosity products can be dubbed an organic solvent solution.

Hydroxypropyl Methylcellulose In the Construction Building

Hydroxypropyl Methylcellulose In the Construction Building

1. Cement Mortar

Hydroxypropyl MethylCellulose helps to increase the dispersion of cement-sand, greatly improve the plasticity of mortar and water-holding capacity, prevent cracks and enhance the strength of cement.

2. Tile Cement

HPMC cellulose helps to improve the plasticity and water-holding capacity of pressed tile mortar, enhance the adhesion of tiles and prevent chalking.

3. Hydroxypropyl MethylCellulose for Refractory Materials Such as Asbestos

Hydroxypropyl MethylCellulose acts as suspension stabilizers and fluidity-improving agent, and also improves the adhesion with substrate.

4. Gypsum Concrete Slurry

Hydroxypropyl MethylCellulose can improve water-holding capacity and processing performance, and enhance the adhesion with substrate.

5. Joint Cement

Hydroxypropyl MethylCellulose can be added to the joint cement for gypsum board to improve liquidity and water-holding capacity.

6. Latex Putty

Hydroxypropyl MethylCellulose can improve the liquidity and water-holding capacity of putty based on resin latex.

7. Plasters

As a paste substituting for natural products, it can improve the water-holding capacity and the adhesion with substrate.

8. Paints

As the plasticizer of latex paint, Hydroxypropyl MethylCellulose has an effect on improving paint and improving the operational performance and liquidity of putty powder.

9. Spray Paint

Hydroxypropyl MethylCellulose has a good effect on preventing the filler sinking of cement-based or latex-based coating materials and improving the liquidity and the spray pattern.

10. Cement and Plaster Secondary Products

Hydroxypropyl MethylCellulose can be used as the binder for the extrusion molding of hydraulic substances such as cement – asbestos-based materials to improve the liquidity and obtain uniform molded products.

11. Fiber Wall

Since Hydroxypropyl MethylCellulose has anti-bacterial anti-enzyme effects, it is effective as the binder of sand wall.

HydroxyPropyl MethylCellulose (HPMC) physical property

Hydroxy propyl methyl cellulose is produced from highly pure cotton cellulose by special etherification in alkaline conditions. The whole process is completed under automatic monitor control and contains no active constituents, such as animal organs and grease. The product is non-ionic cellulose ether, in the shape of white powder, odorless and tasteless.

English Name: Hydroxy Propyl Methyl Cellulose

Alias:

HPMC; (2R,3R,4S,5R,6S)-3,4,5-trimethoxy-2-(methoxymethyl)-6-[(2R,3R,4S,5R,6R)-4,5,6-trimethoxy-2-(methoxymethyl)tetrahydropyran-3-yl]oxy-tetrahydropyran; 1-[[(2R,3R,4S,5R,6S)-3,4,5-tris(2-hydroxypropoxy)-6-[(2R,3R,4S,5R,6R)-4,5,6-tris(2-hydroxypropoxy)-2-(2-hydroxypropoxymethyl)tetrahydropyran-3-yl]oxy-tetrahydropyran-2-yl]methoxy]propan-2-ol

CAS Number: 9004-65-3

Molecular Formula: C56H108O30

Molecular Weight: 1261.4387

1. Appearance: white or off-white powder

2. Granularity: The passing rate of 100 mesh is over 98.5% and that of 80 mesh is 100%. The particle size of particular specification is 40-60 mesh.

3. Carbonization Temperature: 280-300℃

4. Density: 0.25-0.70g/cm (usually about 0.5g/c), and the relative density is 1.26-1.31.

5. Discoloration Temperature: 190-200℃

6. Surface Tension: 42-56 dyn/cm for 2% aqueous solution

7. Solubility

The product is soluble in water and part of solvents such as alcohol-water and propyl alcohol-water solvents in an appropriate proportion. The aqueous solution owns surface activity, high transparency and stable properties. Products of different specifications have different gelation temperatures and the solubility changes with the viscosity. The lower the viscosity is, the higher the solubility will be. HydroxyPropyl MethylCellulose products with different specifications also have difference in properties and the dissolution of HydroxyPropyl MethylCellulose in water won’t get affected by the pH value.

8. As the methoxyl content decreases, the gel point of HydroxyPropyl MethylCellulose  rises; the water solubility decreases and the surface activity will accordingly reduce.

9. Besides, HydroxyPropyl MethylCellulose has thickening capacity, salt tolerance, low ash content, pH stability, water-retaining property, dimensional stability, excellent film-forming ability, extensive resistance to enzymes, dispersibility and cohesiveness.

Synthetic Method

Get the purified cotton cellulose disposed in alkaline liquor at 35-40℃ for half an hour, then squeezed and smashed. At the temperature of 35℃, aging treatment is properly carried out in order to make the average degree of polymerization of alkaline fiber obtained within the required range. Put the alkaline fiber into etherification kettle and add propylene epoxide and methyl chloride in turn. Afterwards, get it etherified for 5h at the temperature of 50-80℃and the maximum pressure is about 1.8Mpa. Then, add an appropriate amount of hydrochloric acid and oxalic acid washing materials into the hot water of 90℃ to make the volume expand. It can be  dehydrated by centrifuge. When it is washed to neutral and the water content in materials is below 60%, it can be dried as low as 5% in water content by hot air flow of 130℃. Finally, the finished product can be sifted over 20 mesh smashing.

Health Hazard

The product is safe and non-toxic, can be used as food additives. HydroxyPropyl MethylCellulose has no calory and no stimulation to skin and mucosa. HydroxyPropyl MethylCellulose is generally recognized as safe (FDA1985) and the acceptable daily intake (ADI) is 25mg/kg (FAO/WHO 1985). In operation, one should wear protective equipment.

Environmental Impact

Avoid air pollution resulting from dust emissions by throwing at will.

Physical and Chemical Hazards

Avoid contact with fire source, the formation of plenty of dust in airtight environment, and explosive hazards

What is hydroxypropyl methylcellulose HPMC ?

Hydroxypropyl methylcellulose HPMC is refined from cotton by alkalization, and propylene oxide and methyl chloride are used as etherifying agents to form a nonionic cellulose mixed ether through a series of reactions. Hydroxypropyl methylcellulose is a nonionic cellulose ether that has a white appearance and is odorless and tasteless. The degree of substitution is generally 1.2-2.0. Its properties vary depending on the ratio of the methoxy group content and the hydroxypropyl group content.

Synthesis of hydroxypropyl methylcellulose:

The purified cotton cellulose was treated with an alkali solution at 35 to 40 ° C for half an hour, pressed, and the cellulose was pulverized at 35 ° C and appropriately aged so that the average degree of polymerization of the obtained alkali fibers was within the range required. The alkali fiber was placed in an etherification tank, and propylene oxide and methyl chloride were sequentially added thereto, and etherified at 50 to 80 ° C for 5 hours, and the maximum pressure was about 1.8 MPa. Then, an appropriate amount of hydrochloric acid and oxalic acid washings were added to hot water at 90 ° C to expand the volume. Dehydrated with a centrifuge. When the moisture content of the material is less than 60%, it is rinsed to neutral and then dried to less than 5% with a hot air stream of 130 °C. Finally, the finished product was obtained through a 20 mesh sieve.

Hydroxypropyl methylcellulose is a nonionic cellulose ether with a white powder appearance, odorless and tasteless, soluble in water and most polar organic solvents, proper ratio of ethanol/water, propanol/water, dichloro Ethane and other insoluble in ether, acetone, anhydrous ethanol hydroxypropyl methylcellulose (HPMC) has the properties of thermogel, swells in cold water to form a clear or slightly turbid colloidal solution, hydroxypropyl methylcellulose dissolves After heating in an aqueous solution, a gel is formed, which is dissolved after cooling. Different gel temperatures vary from product to specification. Solubility varies with viscosity. The lower the viscosity, the greater the solubility. There are some differences in the performance of HPMC of different specifications. Hydroxypropyl methylcellulose (HPMC) is not affected by the pH value in water. The aqueous solution has surface activity, high transparency and stable properties. It has the characteristics of thickening, bonding, dispersing, emulsifying, film forming, suspension, adsorption, gelation, surface activity, moisture retention and protective colloid. Particle size: 100 mesh pass rate is greater than 100%. Bulk density: 0.25-0.70g / (usually 0.4g / s), specific gravity 1.26-1.31. Color change temperature: 180-200 ° C, carbonization temperature: 280-300 ° C. Hydroxypropyl methylcellulose (HPMC) has thickening ability, salt release, pH stability, water retention, dimensional stability, extensive enzyme resistance and excellent dispersibility. Hydroxypropyl methylcellulose, methyl cellulose can be used in building materials, coatings industry, synthetic resin, ceramic industry, medicine, food, textile, agriculture, household chemicals, etc.

Construction industry

1,Cement mortar: Improve the dispersibility of cement-sand, greatly improve the plasticity and water retention of the mortar, and have an effect on preventing cracks, which can enhance the strength of the cement.

2,Tile cement: Improve the plasticity and water retention of the pressed tile mortar, improve the bonding force of the tile, and prevent the powder.

3, asbestos and other refractory coating: as a suspension agent, fluidity improver, but also improve the adhesion to the substrate.

4, gypsum coagulation slurry: improve water retention and processability, improve the adhesion to the substrate.

5,Joint cement: added to the joint cement for gypsum board to improve fluidity and water retention.

6,Latex putty: Improve the fluidity and water retention of putty based on resin latex.

7,Stucco: As a paste instead of natural material, it can improve water retention and improve the bonding force with the substrate.

8,Coating: As a plasticizer for latex paint, it has an effect on improving the handling properties and fluidity of paints and putty powder.

9,Spray coating: It has good effect on preventing the cement or latex coating from sinking and improving the fluidity and spray pattern.

10,Cement and gypsum secondary products: used as an extrusion molding binder for hydraulic materials such as cement-asbestos, which improves fluidity and provides uniform molded articles.

11,Fiber wall: It is effective as a binder for sand walls due to its anti-enzyme and antibacterial action.

12,Others: It can be used as a bubble retaining agent (PC version) which acts as a thin clay mortar and a mud hydraulic operator.

chemical industry

1,Polymerization of vinyl chloride and vinylidene: As a suspension stabilizer for polymerization, a dispersant can be used in combination with vinyl alcohol (PVA) hydroxypropyl cellulose (HPC) to control the distribution of particles and particles.

2,Adhesive: As a bonding agent for wallpaper, instead of starch, it can usually be used together with vinyl acetate latex paint.

3, pesticide: added to pesticides, herbicides, can improve the adhesion effect when spraying.

4,Latex: An emulsion stabilizer for improving asphalt latex and a thickener for styrene-butadiene rubber (SBR) latex.

5,Binder: As a molding adhesive for pencils and crayons.

Cosmetic industry

1,Shampoo: Improve the viscosity of shampoo, washing agent and detergent and the stability of bubbles.

2,Toothpaste: Improve the fluidity of toothpaste.

food industry

1,Canned citrus: Prevents whitening and deterioration due to decomposition of citrus in storage.

2, cold food fruit products: added to the sherbet, ice, etc., to make the taste better.

3,Sauce: As an emulsion stabilizer or thickener for sauces and ketchup.

4, cold water coating glazing: used for frozen fish storage, can prevent discoloration, quality degradation, coated with methyl cellulose or hydroxypropyl methylcellulose aqueous solution, and then frozen on the ice layer.

5,Adhesives for tablets: As a molding adhesive for tablets and granules, the adhesion “crash at the same time” (dissolving rapidly and dispersing when taken) is good.

Pharmaceutical industry

1,Encapsulation: The solution is prepared into a solution of an organic solvent or an aqueous solution, and the prepared granules are spray-coated.

2, slow down the agent: 2-3 grams per day, each time 1-2G feeding amount, in 4-5 days to show the effect.

3,Eye drops: Since the osmotic pressure of the aqueous solution of methyl cellulose is the same as that of tears, it is less irritating to the eyes, and is added as an lubricant for contact with the lens of the eyeball.

4,Jelly agent: used as a base for jelly-like external use or ointment.

5, impregnating drugs: as a thickener, water retention agent.

Kiln industry

1,Electronic material: As a ceramic electric relay, the binder of the ferrite bauxite magnet can be used together with 1.2-propylene glycol.

2, glaze: used as a ceramic glaze and with enamel, can improve the bonding and processing.

3, refractory mortar: added to refractory brick mortar or cast furnace material, can improve plasticity and water retention.

Other industries

1,Fiber: used as a printing paste for pigments, boron forest dyes, salt-based dyes, textile dyes, and in combination with thermosetting resins in corrugated processing of kapok.

2, paper: used for carbon paper and oil resistant processing of carbon paper.

3, leather: used as the final lubrication or disposable cement.

4, water-based ink: added to water-based ink, ink, as a thickener, film-forming agent.

5,obacco: As a binder for recycled tobacco.