Hydroxypropyl methyl cellulose (hpmc) is a non-positive ion, water-soluble ether. Appearance is milky white to light yellow powder or particles, no odor, odorless, non-toxic. The physical properties of commodities are stable, dissolved water produced smooth, fully transparent, thick solution. One of the most important characteristics of hydroxypropyl methyl cellulose in its application is that it improves the viscosity of the liquid. The actual effect of thickening lies in the concentration value of cellulose ether, shear rate, solution temperature and so on.
Liquid type of the HPMC aqueous solution
In general, without a sense of time-dependence. The liquid ground stress in the shear flow can indicate the number of culverts of the shear rate. The () is sorte out by action. Liquid can be divide into non-Newtonian liquid, Peng liquid, pseudoplastic liquid and binghan plastic deformation liquid.
Cellulose ether is divided into non-inorganic compound and inorganic compound cellulose ether. The results showed that both the non-inorganic compound and the inorganic compound cellulose ether solutions were pseudoplastic mobility. Namely the non-Newtonian mobility, which were close to the non-Newtonian liquid only when the concentration value was very low.
The pseudoplastic deformation of hydroxypropyl methylcellulose solution has the key application value. In architectural coatings, for example, because of the water solution cutting thinning characteristics. With the increase of shear rate, solution viscosity reduction, is beneficial to the symmetrical dispersion of color slurry particles, also improve the liquidity of the building paint, building coatings building coating actual effect is very big, and under the static data, solution viscosity is very big, reasonably avoid the accumulation of color slurry particles.