Hydroxypropyl Methylcellulose (HPMC)

Application
Gypsum-Based Tape-Joint Compounds and Crack Fillers
Cellulose ethers are multifunctional additives for ready-mixes and dry-mix products. The water retention properties of cellulose additives increase open time and impart workability, lubricity, shrink and crack resistance, void reduction, and adhesion. In dry mix systems, Joinway products ensure fast hydration for reliable performance.
1) Easy Mixing
In both ready-mix and dry-mix products, cellulose ethers enhance the lubricity of the dispersed particles for a smooth, homogeneous crack filler. Delayed soluble Grades of Joinway cellulose ethers are available with delayed solubility for better performance where cold water dispersibility is needed.
2) Improved Workability and Productivity
Cellulose ethers greatly improve water retention, significantly extending the working time and allowing larger batches to be mixed and applied. Longer water retention allows gypsum in the mix to fully hydrate and develop high mechanical strength; the improved plasticity gives a smooth "feel" that users appreciate.
3) Enhanced Final Properties
Materials that contain cellulose ethers resist shrinkage and crack formation and dry with a homogenous surface. Cellulose additives enhance adhesive properties for greater resistance to sagging. And because all grades of Joinway cellulose are white powders, they help maintain desired product color.
Cement-Based Tile Adhesives
1) Easy mixing without lump formation
Joinway cellulose ethers as additives are vital when dry powder products are mixed by hand. The lubricating properties of Joinway cellulose ethers reduce friction between particles, saving time and making thorough dispersion easier.
2)Improved workability
The lubricity of Joinway cellulose ethers improves workability, making spreading easier and increasing efficiency. Users also prefer the "feel" that cellulose products give to tile adhesives and grouts.
3) Good water retention
Cellulose ethers increase the water retained by the adhesive, minimizing the amount absorbed by the substrate and by the tile. This prolongs open time, and brings gains in productivity because the adhesive can be applied to a wider area. Joinway cellulose also can extend shelf life and pot-life of ready-mixed adhesives, prolonging their usefulness.
4) Enhanced adhesion and sliding resistance
Joinway cellulose products enhance adhesion, even at high ratios of water to solids, ensuring a better result and preventing sagging. Joinway additives can help your products resist sliding, a benefit that tile setters will appreciate.
5)Heat resistance
Redispersible polymer powders can be included in formulations using Joinway cellulose ethers to ensure that adhesives offer bonding strength after exposure to heat.
Gypsum-Based Plasters
Cellulose ethers enhance the lubricity of dispersed particles, resulting in a smooth, easily mixed, homogeneous plaster. Joinway products improve water retention in gypsum-based compounds, significantly extending the time the plaster can be worked— larger batches can be mixed and applied.
Joinway cellulose ethers ensure even consistency and plasticity of the mix for excellent workability. Plasters made with Joincel additives spread and even out easily with a 'feel' that users appreciate. Joinway cellulose ethers enhance the bonding of the plaster to a variety of surfaces and ensure a greater resistance to sagging. Plasters enhanced with Joinway adhere firmly as soon as applied, sticking to the wall, not to the trowel.
Final Plaster Properties
Joinway cellulose ethers keep water available to hydrate the gypsum over a longer period of time—allowing high mechanical strength to develop. Joinway products also inhibit crack formation and help form a homogenous plaster surface.
Indoor plasters made with Joinway cellulose ethers finish easily to a smooth, white surface; particles of the mix are dispersed more evenly, without lumps. And because all Joinway grades are white powder, they help maintain desired finish color.
Cement-Based Plasters
Joinway cellulose ethers are essential components of successful cement-based plaster formulations. Plaster must retain enough water for proper setting of the cement and to achieve high mechanical strength. Joinway cellulose ethers improve water retention of cement-based plasters and offer these additional advantages:
1)Easy Mixing
Joinway cellulose ethers, in plaster grades, dissolve very quickly, allowing the complete dispersion of all dry particles. Joinway additives enhance the lubricity of dispersed particles resulting in a smooth, homogeneous plaster. The surface activity of Joinway products helps entrain additional air for improved workability.
2)Application
Joinway cellulose ethers improve the rheology of the plaster for excellent workability and consistency. Improved consistency allows smoothing and evening without sagging. Joinway products give the plaster an ideal amount of stickiness so it adheres to the substrate wall, not to the working trowel. The high water retention properties of Joinway cellulose ethers also prolong working time.
Machine plaster requires a cellulose ether which dissolves very quickly, builds up consistency before the plaster is on the substrate, and shows no post-thickening on the wall. Joinway cellulose ethers help produce a plaster with good pumpability, excellent workability characteristics, easy finishing, and a homogenous surface.
3)Final Plaster Properties
Joinway cellulose ethers in the mix retain water for a longer period of time—longer water availability means the cement can fully hydrate and develop high mechanical strength. This produces a plaster with a homogenous surface, smooth, lump-free finish, and greater resistance to cracks.
Paint and Paint Removers
Joinway cellulose ethers offer flexibility during formulation. They can be dispersed in water or glycol when added to the pigment, or can be dispersed as a powder in the pigment before the addition of water.
During paint manufacture, Joinway cellulose ethers lubricate the pigment mix, reducing friction between particles and facilitating grinding at high shear rates.
Joinway cellulose ethers increase your products' viscosity, thickening the paint and enhancing coverage. And Joinway additives improve flow characteristics, providing low spattering and good leveling so good results are quick and economical.
Surface characteristics of Joinway products ensure that particles are well dispersed, avoiding coalescence. Cellulose ethers enhance water retention to give your products high stability during drying.
Joinway cellulose ethers are chemically inert and are thus highly compatible with other paint components. There are Joinway grades available that offer high resistance to biological breakdown to ensure longer shelf life.
Both water-based and methyl chloride-based paint removers can be made highly viscous with Joinway cellulose ethers so they will remain in place while the paint is dissolved.

Packaging
25 kg multi-layer paper bag with polyethylene inner film.
Storage and inventory control
In the dry state cellulose is resistant to microbial and enzymatic degradation, but does not function as bactericide or fungicide itself. lt must be stored dry in tightly closed containers. Don't put them together with other chemicals.

For further information or selection guide please contact us.

Zhejiang Joinway Pharmaceutical Company is a young company that provides chemical products and services to many essential consumer markets. With our major products, cellulose ethers, acetylacetone and several other pharmaceutical additives, Joinway Pharma serves customers in lots of countries and several fields that are important to everyday life of humans, including construction, food, personal care and pharmaceuticals and paint, etc. In the meantime we constantly develop new applications and product solutions in partnership with our customers. Joinway Pharma is a GMP certified pharmaceutical manufacturer. We mainly offer: Cellulose ethers; (MC, HPMC, MHEC, EC, HPC MCC) . Acetylacetone ; And pre-gel starch, carboxymethylstarch sodium, micro silica, polyacrylic resins (carbopol equivalents), calcium sulfate, magnesium stearate, lyophilized royal jelly etc. All Pharma grade products are manufactured under full compliance with GMP norm and meet generally recognized standards. The company is located in Economic Development Zone of Huzhou city in Zhejiang of east China . And only 70KM from Hangzhou and 140KM from Shanghai. The company is officially new founded but is now growing up quickly. In the next few years, Joinway Pharma will work out various market strategies for corresponding products. And will establish stable and long-term relationship with distributor/agents in order to set up an international wide network to offer best services to global customers.