Stop rubbersteel . corrosion Start choosing from seven CHEMIGUM NBR'S. They all pass the industry's standard corrosion test—without a scratch. See photo at right. Reason: an advanced extruder-dewatering process reduces the water-sensitive salts in the polymer to an absolute minimum. So it can't corrode steel. Now you can get the exact properties you need. For leak-free shaft seals, O-rings, gaskets, bearing seals and similar applications. Just pick out the exact CHEMIGUM® you need from the table below. And clip the coupon. CHEMIGUM
N206 N300 N600 N608 N612 N615 N625
Nitrile Content very high high medium medium medium medium medium
Mooney Viscosity 50-70 45-63 40-58 70-90 20-34 45-63 40-54
Try 'homogenized' BMB's PLIOFLEX SBR Black Masterbatches exceed the industry dispersion standards. The slides prove it. At near right is a commercially available BMB. Under the microscope at 165X magnification, 97.2% of the carbon black by volume is dispersed below 10 microns. At far right is the PLIOFLEX® BMB standard: 99.7% carbon black by volume dispersed below five microns. That's why the PLIOFLEX BMB looks smoother. Why it breaks down easier and processes faster. You get faster mixing, faster extrusion. Better dispersion leaves fewer weak spots, too.
That's why you get higher \ tensile with PLIOFLEX BMB's. Plus a smoother, shinier finished product. Good resistance to abrasion and flex cracking. Low heat buildup and dye swell. High modulus and elongation. Prove it—on us.Test a sample of PLIOFLEX Black Masterbatch, And stop getting your lumps.
New: oil-extended Natsyn Tests show new NATSYN 4 5 0 is superior to all other competitive polyisoprenes. New NATSYN® 450 is polyisoprene rubber with an oil content of 25 pph of Naphthenicoil. It gives you: Higher modulus— 2700 psi. Higher hot tensile strength —2200 psi. And higher tear strength —322 at 212° F and 360 at room temperature. (See graphs at right.) Plus better scorch resistance— 19.9 minutes to a 5 point rise at 250° F. And you save constant sam pling and frequent adjustments. Be cause it's more consistent than nat ural rubber. Just set your system and forget it. Available in polyethylene bags and .standard Gaylord containers. With 24-hour delivery to prime U.S. rub ber markets. No pier or f r e i g h t charges attached. Just the cost sav ings of only 20%φ per pound. Get NATSYN 450—the new oil-ex tended polyisoprene rubber. And strike it rich.
New NATSYN 450 vs. Competitive Polyisoprenes in a black loaded stock 300% MODULUS, psi 20min.@293°F
TENSILE STRENGTH, psi 20min.@293°F RT
4000J
3000 212°F|
30004-
, -%
2500
20004- &
2000
NATSYN 4 5 0
Straight synthetic polyisoprene
Oil-extended polyisoprene
Oil-extended polyisoprene
MOONEY-SCORCH, M S @ 2 5 0 ° F Minutes to 5 point rise
III. NATSYN 4 5 0
Straight synthetic polyisoprene
Oil-extended polyisoprene
Oil-extended polyisoprene
TEAR STRENGTH, DIE C 400^
Cold I 350 J
30.+ 20. 10. 0.
• ••I NATSYN 4 5 0
Straight synthetic polyisoprene
Oil-extended polyisoprene
| Hot
300 J 250 J 200 J 150 I NATSYN 4 5 0
Oil-extended polyisoprene
Straight synthetic polyisoprene
Oil-extended polyisoprene
Oil-extended polyisoprene
Goodyear Chemical Data Center, Dept. F-16, Box 9115, Akron, Ohio 44305. Please send me data Π and/or samples Π of the following: Π CHEMIGUM® NBR PLIOFLEX® SBR Black Masterbatches NATSYN® 450 polyisoprene
Π •
NAME FÎRM ADDRESS CITY
STATE
"ZÎF
GOOD/YEAR
