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Polyvinyl formal acetal resin. PVF
Appearance =Lumps up to 40 mm, from white to light yellow COLOR
| formal 7-14 % | |
| ethylal 58-74 % | |
| acid value 0.4max | |
| water content 2.0max | |
| viscosity 200-2000 mpa.s |
Viscosity mesured of 10%-solution in solvents chlorbenzene : 2- ethoxyethanol (1:1). Viscosimeter Dia 5,4 mm), sec = 20-60
polyvinyl formal acetal resin