Use of hydroxypropylmethylcellulose (HPMC)
1.Building mortar plastering mortar
High water retention can fully hydrate the cement and significantly increase the bond strength. At the same time, the tensile strength and shear strength can be appropriately improved, which greatly improves the construction effect and improves work efficiency.
2.Water resistant putty
In putty, cellulose ether mainly serves as water retention, bonding and lubrication to avoid cracks and dehydration caused by excessive water loss. At the same time, it enhances the adhesion of putty and reduces the phenomenon of hanging in construction. The construction is relatively smooth and successful.
3.Stucco plaster series
In the gypsum series of products, cellulose ether mainly plays the role of water retention, thickening, lubrication, etc., and at the same time has a certain retarding effect, which solves the problem of bulging and initial strength during the construction process, and can extend the working time.
Mainly used as a thickener, it can improve tensile strength and shear strength, improve surface coating, enhance adhesion and bond strength.
5.Exterior wall insulation mortar
Cellulose ether focuses on bonding and increasing strength in this material. It is easier to apply sand and improves work efficiency. At the same time, it has anti-sagging effect. High water retention performance can extend the working time of the mortar, improve shrinkage and cracking resistance, improve surface quality, and improve bond strength.
The high water retention does not have to be pre-soaked or moistened with ceramic tiles and bases, which significantly improves their bonding strength. The slurry can have a long construction cycle, delicate, uniform, convenient construction, and good moisture resistance.
7.Caulking agent, groove agent
The addition of cellulose ether makes it have good edge adhesion, low shrinkage and high wear resistance, protects the base material from mechanical damage, and avoids the impact of penetration on the entire building.
8.DC leveling material
The stable adhesion of cellulose ether ensures good fluidity and self-leveling ability, and the control of water retention rate enables it to solidify quickly, reducing cracking and shrinkage.
9.Latex paint paint
In the coating industry, cellulose ether can be used as a film-forming agent, thickener, emulsifier and stabilizer, so that the film has good wear resistance, uniform coating, adhesion, and PH that improves surface tension. The miscibility effect with organic solvents is also good, and the high water retention performance makes it have good brushing and leveling properties.
In the new type of honeycomb ceramics, the blank product is given lubricity, water retention and strength.
11.The area where hydroxypropylmethylcellulose (HPMC) products are most consumed in our country is the suspension polymerization of chloroethyl.In the floating polymerization of vinyl chloride (VC), the dispersion system directly affects the PVC resin of the product, its processing and the quality of the product; to improve the thermal stability of the resin and control the particle size distribution (both adjust the density of PVC), the amount of HPMC accounts for 0.025%-0.03% of PVC production.The PVC resin prepared by high-quality HPMC can not only ensure that its performance meets international standards, but also has good apparent physical properties, excellent particle characteristics and excellent melt rheological behavior.
At present, the quality of domestic hydroxypropylmethylcellulose ether products has reached the imported level.
According to research, in the production process of PVC, the dispersion system of each enterprise is different, and the properties of the PVC outer film produced are also different, which affects the processing performance of PVC resin.In the composite dispersant system, the effect of suspended PVC resins prepared by polyvinyl alcohol (PVA) and hydroxypropylmethylcellulose (HPMC) composite dispersants with different alcohol solubility and polymerization degrees on the processing properties has been tested. It has been shown that KP-08 or KZ-04 with an alcohol solubility of 68%-75% is better combined with HPMC, which is conducive to the looseness and porosity of the resin, and it is also beneficial to the absorption of plasticizers.