HPMC For Wall Putty/Plaster

Product Description

Hydroxypropyl Methyl Cellulose HPMC

PHYSICAL AND CHEMICAL PROPERTIES:

* Particle size: 98.5% passes through 100 mesh; 100% passes through 80 mesh.

* Charring temperature: 280-300℃.

* Bulk density: 0.25-0.70 g/cm3 (Usually around 0.5 g/cm3 )

* Real specific gravity: 1.26-1.31.

* Browning temperature: 190-200℃.

* Surface tension: (2% water solution) 42-56dyn.cm.

* Properties: Dissolved in water and some organic solvent such as ethanol. propyl alcohol. ethylene chloride, the water solution is of surface activity. It is a nonionic surface active agent. Gelation temperature is different for different grades. For example, among 60RT Hydroxypropyl Methylcellulose, 60 is gelation temperature, Namely, 2% water solution will form gelation at 60%.

Wall Putty Hydroxyporpyl Methyl Cellulose(HPMC)

The coating system is generally divided into three layers: wall, putty and paint. When the ambient temperature and humidity change, due to the different deformation coefficients of the three-layer materials, the deformation is consistent, which inevitably generates stress in the decoration system. The putty resists cracking of the substrate and peeling of the film by virtue of its flexibility to relieve stress. At the same time putty provides a leveling, smooth or textured substrate for latex paints. Due to the optimization of the putty formula, the amount of latex paint is reduced and the service life of the coating film is prolonged.