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BR277

BR277

BR277

Main Features

BR277 rubber is a solution polymerized low cis star branched, low efficiency coupled, oil extended polybutadiene produced using alkyl lithium initiator in batch reactors.

Properties	Test Methods	Analytical Manual	Units
General
Mooney Viscosity	ASTM D1646	MPP16	ML1+4 @ 100°C	37 – 47
Bound Styrene	ASTM D5775	MPP5-MPP6	wt %	N/A
Block styrene	ASTM D3314	MPP8	wt %	N/A
Solution viscosity*	ASTM D5774	MPP9	cPs	N/A
Gel content		MPP12	arbitrary	N/A
Molecular weight		MPP1	KDalton	N/A
Coupling efficiency		MPP1	%	N/A
Volatile matter content	ASTM D5668	MPP10	wt %	0.3 max
Residual solvent		MPP18	ppm	N/A
Colour	ASTM E313	MPP13	Yellow index	N/A
Solution color (Pt/Co)	ASTM D1209		arbitrary	N/A
Vinyl content		MPP5-MPP6	wt % on butadiene	11 – 13
Ash content	ASTM D5667	MPP15	wt %	0.04
Solvent extractables	ASTM D5774	MPP11	wt %	26.3–29.3