KimaCell®HPMC F 50 Hydroxypropyl methyl cellulose is function as dispersants in PVC industry. In the suspension polymerization of vinyl chloride, the commonly used dispersants mainly include polymer compounds such as polyvinyl alcohol and cellulose ether. Under the action of stirring, it becomes a droplet of appropriate size. This effect is called the dispersing ability of the dispersant; on the other hand, it is adsorbed on the surface of the VCM droplet to form a protective layer to prevent the aggregation of the VCM droplet and stabilize the droplet. Protective effect, this effect is called the colloid retention ability of the dispersant.
HPMC F 50
Hydroxypropyl Methyl Cellulose (HPMC)
White to slightly off-white fibrous or granular powder.
Identification A to E
Loss on drying
Residue on ignition
Min. 98% pass through 100 mesh
Total plate count
Yeast and Mould
KimaCell® HPMC F 50 is one of the main dispersant varieties in the polyvinyl chloride (PVC) industry. During the suspension polymerization of vinyl chloride, it can reduce the interfacial tension between VCM and water, and help vinyl chloride monomer (VCM) to disperse uniformly and stably in the water medium; prevent VCM droplets from merging at the beginning of the polymerization process; Prevent coalescence between polymer particles in the middle and later stages. In the suspension polymerization system, it plays a dual role of dispersing and protecting stability.
Polyvinyl chloride (PVC) resin with a low degree of polymerization generally refers to a polyvinyl chloride (PVC) resin with a degree of polymerization below 800. Due to its low molecular weight, high apparent density, good melt fluidity, short plasticizing time, and easy processing, it is widely used in the manufacture of sheets, injection molding pipe fittings, blow molding, and modified resins (such as deep chlorination to produce chlorinated polyvinyl chloride). Vinyl chloride resin) and so on are widely used. However, the porosity of PVC resin with low degree of polymerization is low, the resin particles are relatively compact, and the particle film produced by the graft copolymerization of dispersant and vinyl chloride is relatively thick, which affects the processing performance and further modification of the resin.