Hpmc used in putty powder

Hpmc used in putty powder

Hpmc can be used in putty powder,there are mainly four types of putty cracks.

1. Insulation cracks: Generally, irregular cracks are common. It is caused by many reasons such as shrinkage deformation of benzene board, mesh cloth, mortar, and incorrect construction. The solution should be based on the size and distribution of the crack. If it is serious, it is necessary to add a mesh cloth or mesh cloth. If it is not serious, use a two-component flexible putty to complete the batch.
2. Stucco layer crack: The leveling mortar is not flexible enough, and it shows a relatively large crack of the turtle, which is generally evenly distributed. Use high-elastic putty or two-component elastic putty to complete the repair.
3. Wall crack: The crack shows an uneven distribution with the change of the foundation. This is caused by the settlement deformation of the wall. Solution: 1. If the building has been settling and deformation, do not be busy repairing, it is best to wait until it is no longer deformed. 2. Repair should be based on the shape and density of the crack, and can be repaired by slotting or patching with mesh cloth. High-elastic putty must be used.
4. Puddle layer crack: Generally, it is a tiny crack of the turtle, evenly distributed. Note that the seam is not the seam, and the seam and the seam are different.
5. The problem of cracking of the putty layer.
6. Inorganic binder (ash calcium powder, cement) is added in too much amount, and too much strength will cause cracks. Generally, cracks appear in the waterproof and putty on the inner and outer walls. The addition of ash calcium powder exceeds 50%, resulting in putty strength. Large, the surface is hard and brittle, and it is easy to produce cracks in the turtle. In the past, glue was used in most parts of China (not 107 glue, because 107 glue was stopped due to environmental problems), and the old powder or the external wall glue and white cement were easy to produce powder and crack.
7. The paint layer of the inner and outer wall base is loose and dusty. If it is not solved, the full batch of putty is a layer of powder on the surface, and it is easy to stratify the drum. If the sound is different by hand, as the outside temperature changes, the crack slowly appears, and the crack cracks in the direction of the hollow drum. If you open the crack, you will see that the putty and the bottom of the wall are two layers, and the middle layer is dusty.
8. The putty coating layer is too thick to produce cracks. Generally, the thickness of the putty is 1-2mm, generally not more than 3mm. Some inner and outer walls have poor flatness, and the error is as high as 3-5 cm. If the all-purpose putty powder is leveled, it must be cracked. The mortar should be leveled. The larger the error, the thicker the mortar is. The base layer is made of masonry mortar, and after the soft mortar is leveled, the putty can be fully applied.
9. To solve this kind of wall bottom, first look at the wall base. If the powder is severely removed, it must be cleaned. After washing with water, the putty can be scraped. If it is not serious, as long as the surface layer can be brushed with glue, it can be full of putty.
10. The correct choice of filler material is also a very important aspect to solve the cracking of putty powder. Flexible fillers include sepiolite powder, talc powder, mica powder, and wollastonite powder. These fillers increase flexibility and reduce cracking, which is the most effective way to reduce the production cost of putty and mortar. The more latex powder, the more resistant it is to cracking.
11. The formula is unreasonable. Generally, when designing the formula, it depends on the requirements of the project. Whether the requirement is the inner wall or the outer wall, rigidity or flexibility. Whether it is putty or thermal insulation mortar, there is a rule: strength and flexibility are inversely proportional, the greater the strength, the worse the flexibility, the more prone to cracking, the different strength and flexibility require different rubber powder, cellulose ether, you can change the cement. The performance of ash calcium powder increases flexibility and enhances crack resistance.

The description of hydroxypropyl methylcellulose HPMC

The description of 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.

hydroxypropyl methylcellulose used in mortar

hydroxypropyl methylcellulose used in mortar

Hydroxypropyl methylcellulose (HPMC) is a nonionic cellulose ether prepared by a series of chemical processing using pure cotton as a raw material. Mainly used in the construction industry: water-resistant putty powder, putty paste, steel putty, paint glue and masonry mortar, dry powder insulation mortar and other dry powder building materials.

Hydroxypropyl methyl cellulose (HPMC) has good water retention effect, workability easily, and a wide variety of viscosities to meet different needs.

Hydroxypropyl methylcellulose with good performance can significantly improve the construction performance, pumping and spraying performance of mortar, and is an important additive in the mortar.

1. Hydroxypropyl methyl cellulose (HPMC) has excellent water retention properties and is widely used in various mortars, including masonry mortar, plastering mortar and ground leveling mortar, to improve the bleeding of mortar.

2. Hydroxypropyl methyl cellulose ether has a significant thickening effect, improves the construction performance and workability of the mortar, achieves the desired appearance effect, and improves the fullness and volume of mortar.

3. Hydroxypropyl methyl cellulose can improve the cohesiveness and operability of mortar, overcome the common defects of common mortar such as shelling and empty drum, reduce blanking, save materials and reduce costs.

4. Hydroxypropyl methylcellulose has a certain retarding effect, which can ensure the operational time of mortar and improve the plasticity and construction effect of mortar.

5. Hydroxypropyl methyl cellulose can introduce an appropriate amount of bubbles, which can greatly improve the frost resistance and durability of mortar.

6. Cellulose ether is a kind of water-retaining and thickening material combined with physical and chemical effects. It can produce micro-expansive materials in the hydration process, which can make the mortar have certain micro-expansive properties, prevent the cracking caused by shrinkage in the later hydration process, and improve the service life of the building.

http://www.chinahpmccellulose.com

hydroxypropyl methyl cellulose HPMC for tile adhesive

hydroxypropyl methyl cellulose HPMC for tile adhesive

Appearance: White powder.
Particle size: 98.0%min through 100mesh.
Charring temperature: 280-300 Deg.C.
Bulk density: 0.25-0.70g/cm3(Usually around 0.5g/cm3)
Real specific gravity: 1.26-1.31
Browning temperature: 190-200 Deg.C.
Surface tension (2% water solution):42-56 dyn/cm.

Physical and Chemical Propertiesl

1.Appearance:HPMC is white or whitish fibrillar/granular and odorless powder.
2.Dissolvability:HPMC is dissolvable in cold water and become clear or slightly 
cloudy liquidcement,but hardly in absolute ethyl alcohol,ethylether or propanone. In addition,HPMC is dissolvable in some organic solvevts or soce mixed solvents of water and organic solvent.
3.Granularity:Throughput rate:≥98.5%for 100 mesh and up to 100%for 80 mesh.
4.Apparent Density:0.30-0.70g/cm3,and density:1.26-1.31g/cm3.

Application

It is widel used as thickener, adhesive, water preserving agent, film-forming 
agent in construction, building materials, dispersion coating, wallpaper paste, 
polymerization aids, leathers, printing ink and paper making etc.l also used in 
petroleum drilling and daily-use chemicals

Hydroxypropyl methyl cellulose is a thickener for aqueous and non-aqueous systems, clear films with grease resistance, binders,

lubricants, steric stabilizer and water retention aid. Dissolves in water, undergoes reversible gelation upon heating, non-ionic, does

not complex with ionic species and is surface actuce and enzyme resistant. Solutions are pseudoplastic.

 Application

l. used as adhesives, thickeners, water-binding agents, emulsifiers, film-forming reagents, dispersing agents and stabilizers in the pharmaceutical industry

2. used as adhesive and water-binding agents in building industry.

3. used as thickeners, dispersing agents and stabilizers in paint, printing and ink industry.

4. used in plastic industry for forming release agents, softeners, lubricants and so on.

5. used in the leather and paper industries, fruit and vegetable fresh-maintaining and textile industry and so on.

Specifications

Items	HPMC
Methoxyl content (-OCH3) w/%	20.0-28.0
Hydroxypropyl content (-OCH2CHOOHCH3),w/%	5.0-11.0
Gelling temperature(°C)	55-80
Moisture content, w/%	MAX 1%
Residue on ignition, w/%	MAX 1.5%
Lead(Pb), ppm	MAX 2
Arsenic (As), ppm	MAX 2
Heavy metal	MAX 20
Viscosity (mpa.s)	5-200000

Hydroxypropyl methyl cellulose hpmc cellulose ether

Hydroxypropyl methyl cellulose(HPMC)

Hydroxypropyl methyl cellulose is a natural polymer cellulose used as a raw material, which is prepared by using a highly pure cotton cellulose as a raw material and by special etherification under alkaline conditions. They are an odorless, non-toxic white powder that swells in cold water into a clear or slightly turbid colloidal solution. Thickening, bonding, dispersing, emulsifying, film forming, suspension, adsorption, gelation, surface activity, such as maintaining water and protective colloid properties.

The main purpose

As a water retaining agent and retarder for cement mortar, the mortar is pumpable. In the plaster, gypsum, putty powder or other building materials as a binder, improve the spreadability and extend the operation time. Used as a paste tile, marble, plastic decoration, paste enhancer, can also reduce the amount of cement. The water retention of hydroxypropyl methyl cellulose HPMC enables the slurry to not crack too quickly after application, and enhances the strength after hardening.

Recommended use

◇Tile adhesive
◇External wall moisturizing system
◇Grout
◇Self-leveling mortar

◇Plastering
◇Inner and outer wall putty
◇Paint, etc.

performance

Improve construction performance,
Improve water retention performance,
Improve bond strength,
Improve anti-slipping, etc.

Application area

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.

http://www.chinahpmccellulose.com/

Hydroxypropyl Methyl Cellulose (HPMC)

Hydroxypropyl Methyl Cellulose (HPMC) is a nonionic cellulose ether polymer with different chemical properties depending on the different degree of modification and substitution of the substituent groups. It is odorless, tasteless, non-toxic cellulose ethers produced from natural high molecular cellulose through series of chemical processing and achieved. It is white powder with good water solubility. It has thickening, adhesion, dispersing, emulsifying, film, suspended, adsorption, gel, and protective colloid properties of surface activity and maintains moisture function properties etc. Mainly used in construction materials, coatings industry, synthetic resin, ceramic industry, textile, agriculture, daily chemical and other industries.

Molecular Formula：

Note: R=degree of polymerization, R=H or CH3 or CH2CHOHCH3

CAS No.: 9004-65-3

Technical Data：

Appearance	White or yellowish powder
Hydroxypropoxyl content （wt%）	7.0-12.0
Methoxyl content（wt%）	19.0-30.0
Fineness	80 mesh-98%
PH Value	6.0-8.0
Ash Content（wt%）	≤5
Loss on drying（wt%）	≤5
Viscosity （Brookfield RVT2%, 20℃）	100-80000mPa.s

Physical and Chemical Properties:

1. Carbonization temperature: 280-300 ° C

2. Density: 370-380g/l

3. Surface tension: 2% aqueous solution is 42-56dyn/cm

4. Solubility: soluble in water and some solvents, such as ethanol/water, propanol/water, etc. in appropriate proportions.

5. No ionic charge: It is non-ionic, it does not combine with metallic salts and ionic organics to form insoluble precipitates.

6. Thermal gel property: Gel will be formed when the aqueous solution of cellulose is heated to a certain temperature, and a solution will be after cooling.

7. PH value stability: it has a wide range of pH values.

8. Water retention: It has excellent water retention properties, making the moisture not easy to lose or be absorbed too quickly by the substrate. Some special grades work well in high temperature environments.

9. Thickening: its aqueous solution system has the thickening property, and the consistence is related to the viscosity of the product used and the type of compound.

10. Film formation: It can be made into a transparent, tough, soft film with excellent resistance to grease.

11. Adhesion: It can be used as a binder for tile adhesives, pigments, tobacco products, paper products, coating etc.

12. Suspension: It can prevent the precipitation of solid particles, because the formation of sediment can be inhibited.

13. Protective colloid: It can prevent small granules or particles forming a mass.

14. Emulsification: The emulsion liquid can be stabilized by reducing the surface and interfacial tension and thickening the aqueous phase.

15. Anti-sagging: It can improve the thixotropy of the product, so that the finished product does not slip even at considerate thickness.

16. Wetting ability: Cellulose has the property of wetting the substrate, no curling even if applied to a special substrate.

17. Open time: It can extend the hardening time of the product, make the raw materials fully hydrated, and improve the tensile strength and flexibility of the product.

Application Fields:

Binder: Used as a thickener and binder in the adhesive formulation.

Ceramic: gives lubricity, water retention and increases the original strength of the ceramic embryo.

Building materials: mixing into cement, so that cement mortar, plaster and gypsum ingredients have water retention properties and improve their workability.

Cosmetics: Regulate rheology to give the product the right viscosity, emulsification, stability, lubricity and foam stability, and surfactant compatibility.

Leather: It is used as a thickener and water retaining agent for leather surface protective rubber when it is processed and dried during leather processing.

Latex coating: as a protective colloid, thickener and pigment dispersant

Paint stripper: Conducive to the compatibility of water and organic solvents, thickener in blade coating and rinse-off paint remover

Paper products: film forming agent for surface sizing or oil repellent coatings.

Plywood: Adjusting the rheology of the binder

Various resins and rubbers: fiber reinforced plastic molding release agent, water based coating emulsifiers, thickeners and stabilizers.

Textiles: as a textile sizing material, thickeners and stabilizers in printing paste or latex paints.

Packaging & Storage & Shelf Life:
hydroxypropyl methyl cellulose
Packaging: 25 kg / bag (customized packaging and weight available)
Inner: PE plastic film bag, outer: PP woven bag.
Storage: Store in a ventilated, cool, dry environment, to prevent the sun and rain.
Shelf life: 12 months since the production date.
Please make test before use if the product is out of the expiring date.

Hydroxypropyl MethylCellulose (HPMC) For Construction

Hydroxypropyl MethylCellulose (HPMC) are widely used in construction, pharmaceutical,food, cosmetic, detergent, paints, as thickener, emulsifier, film-former, binder, dispersing agent, protective colloids.We can provide the regular grade HPMC, we also can provide modified HPMC according to customer requirements. After modified and surface treatment, we can get the goods which is dispersed in water quickly, lengthen open time, anti-sagging, 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