RK-251 is compatible with common polyalcohol and phosphate esters flame-retardant additive,and RK-251 has good synergistic effect with flame-retardant additive.Therefore using RK-251 can make flexible formula.

 RK-251 can partial substitution routine polyatomic alcohol,uniting flame retardant elements and polyurethane molecular chain to get a long-acting flame retardant efficiency.

Technical Data Sheet:

Items	Analysis result
Hydroxyl Value mgKOH/g	330
density (25℃)g/cm3	1．580
Viscosity cps (25℃)mPa.s	7000
Bromine content  %	31.5
chlorine content %	6.9
acid value mgKOH/g	<0.3
appearance	Dark brown liquid
Water %	<0.2
Thermal decomposition ℃	＞160

      

    Packing: RK-251 was packed in 200L galvanized iron bucket, 3000KG/ bucket or 1.5 Mt IBC drum,20Mt per 20'FCL.