FKM 246

Product Detail

Product description:

Fluoroelastomer FKM copolymer Gum-246 series are the copolymer of vinylidenefluoride, tetrafluoroethylene, and hexafluoropropylene. Because of its high fluorine content, its vulcanized rubber has excellent anti oil property and high thermal stability. It also has good mechanical property and can be used in 275? for a long time, in 320? for a short time. The property of anti oil and anti acid is better than FKM-26, resistance of FKM246 to oil, ozone, radiation , electricity and flamer is similar with FKM26.

Execution standard: Q/0321DYS005-2015

 

Quality specification:

Items		246	246G
Appearance		White or light yellow rubber piece
Raw gum	Density	1.82±0.02
	Mooney viscosity	15-80	50-70
	ML(1+10) 121?
Cured rubber	Tensile strength, Mpa, =	12
	Elogation at break,%, =	180
	Hardness	75-82	78-86
Hot air aging (250?,70h)	Tensile strength	9
	Elogation at break,%, =	130	120
Compression Set (200?, 70h), %, =		25	30
Oil resistance(1#Oil,200?,24h), %, =		1
Note: The above vulcanization systems are bisphenol AF

 

Product use:

Widely used for manufacturing washers, gaskets, O-rings, V-rings, oil seals, diaphragms, rubber pipes, cable sheaths, heat insulation cloth, valve plates, expansion joints, rubber rolls, coatings and pasty room temperature vulcanization putties in occasions resisting high temperature, fuel(aviation gasoline, auto fuel), lubricating oil (synthetic oil), fluid (various non-polar solvents), corrosion (acid, alkali), strong oxidizer (oleum), ozone, radiation and weathering.

 

Cautions:

1.Fluorelastomer copolymer has good heat stability under 260?. It will generate trace decomposition if being put at 260-300? for a long time, and its decomposing speed accelerates at above 320?, the decomposition products are mainly toxic hydrogen fluoride and fluorocarbon organic compound. When raw fluorous rubber encounters fire, it will release toxic hydrogen fluoride and fluorocarbon organic compound.

2. Fluorous rubber cannot be mixed with metal powder such as aluminum powder and magnesium powder, or over 10% amine compound, if that happens, temperature will arise and several element will react with FKM, which will damage the equipment and operators.

 

Package, transportation and storage:

1. Fluorous rubber is packed in PE plastic bags, and then loaded into cartons, the net weight of each carton is 20kg.

2. Fluorous rubbers is stored in clean, dry and cool warehouse. It is transported according to non-dangerous chemicals, and should keep away from pollution source, sunshine and water during transportation.