Nancar® NBR 4975

1 of 11 products in this brand
Nancar® NBR 4975 is an ultra-high acrylonitrile butadiene copolymer with excellent oil resistance. It is polymerized at low temperature and contains sufficient antioxidant for normal aging conditions. It has good processing characteristics in compounds where flow and knitting are desired and is especially valuable in high durometer compounds.

Polymer Name: Acrylonitrile Butadiene Rubber (NBR)

End Uses: Automotive Applications, Automotive Fuel Lines, Gaskets, Seals

Features: Cold Polymerized, Good Processability, Low Air Permeability, Oil Resistant

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Knowde Enhanced TDS

Identification & Functionality

Additives Included
Chemical Family
Technologies

Features & Benefits

Applications & Uses

Applications

Nancar® NBR 4975 is suggested for use in those in fuel hoses, packings, gaskets, oil seals, other car parts, oil resistant belts, printing rollers, roll covers products, friction stock and similar applications.

Properties

Physical Form
Typical Properties
ValueUnitsTest Method / Conditions
Bound Acrylontrile Content49%NANTEX E-001
Heat Lossmax. 0.3%ASTM D-5688
Mooney Viscosity [ML1+4 at 100°C]81ASTM D-1646
Solubility100%NANTEX E-001
Specific Gravity1.01
Cured Properties
ValueUnitsTest Method / Conditions
Elongation (20 min, at 150°C)588%ASTM D-412
Elongation (40 min, at 150°C)512%ASTM D-412
Elongation (40min, at 150°C)144Kg/cm2ASTM D-412
Elongation (60 min, at 150°C)448%ASTM D-412
Elongation (60min, at 150°C)165Kg/cm2ASTM D-412
Elongation Change (IRM 901 Oil Immersion, Cured at 100°C×70hrs)-27%ASTM D-471
Elongation Change (IRM 903 Oil Immersion, Cured at 300°C×70hrs)-26%ASTM D-471
Elongation Change (Test Tube Heat Aging at 100°C×70hrs)-25%ASTM D-865
Fuel C Permeability Coefficient (40min, at 150°C)16.6mm/cm2.dASTM D-814
Hardness (Durumeter A, 20min, at 150°C)78ASTM D-2240
Hardness (Durumeter A, 40min, at 150°C)79ASTM D-2240
Hardness (Durumeter A. 60min, at 150°C)79ASTM D-2240
Hardness Change (IRM 901 Oil Immersion, Cured at 100°C×70hrs)1pointsASTM D-471
Hardness Change (IRM 903 Oil Immersion, Cured at 300°C×70hrs)0pointsASTM D-471
Hardness Change (Test Tube Heat Aging at 100°C×70hrs)3pointsASTM D-865
Modulus (at 300%, 20min, at 150°C)114%ASTM D-412
Tear Strength (Die C, 40min, at 150°C)66Kg/cmASTM D-624
Tensile Strength (20min, at 150°C)308Kg/cm2ASTM D-412
Tensile Strength (40min, at 150°C)302Kg/cm2ASTM D-412
Tensile Strength (60min, at 150°C)290Kg/cm2ASTM D-412
Tensile Strength (IRM 901 Oil Immersion, Cured at 100°C×70hrs)-9%ASTM D-471
Tensile strength (IRM 903 Oil Immersion, Cured at 300°C×70hrs)-10%ASTM D-471
Tensile Strength Change (Test Tube Heat Aging at 100°C×70hrs)-7%ASTM D-865
Volume Change (IRM 901 Oil Immersion, Cured at 100°C×70hrs)-0.96%ASTM D-471
Volume Change (IRM 903 Oil Immersion, Cured at 300°C×70hrs)2.5%ASTM D-471
Characteristics

It has ultra-high acrylonitrile rubber with excellent oil resistance.

Regulatory & Compliance

Certifications & Compliance

Technical Details & Test Data

First test recipe: ASTM D-3187
  Parts (phr)
NANCAR® 4975 100.00
Zinc Oxide, CATHAY CHEMICAL, 3A Grade 3.00
Sulfur, 2% MgCO3 coated 1.50
Stearic Acid, NBS SRM 372I 1.00
HAF Black IRB#8 40.00
TBBS, NIST 8384 0.70
Total 146.20

 

Uncured Compound Properties
  TYPICAL VALUE TEST METHODS
Mooney viscosity, ML1+4 @100°C 81 ASTM D-1646

 

Aging Properties

Cured @150°C

PROPERTIES

CURING TIME (MIN)

TYPICAL VALUE TEST METHODS
Tensile Strength, Kg/cm2 20 308 ASTM D-412
Tensile Strength, Kg/cm2 40 302 ASTM D-412
Tensile Strength, Kg/cm2 60 290 ASTM D-412
Elongation, % 20 588 ASTM D-412
Elongation, % 40 512 ASTM D-412
Elongation, % 60 448 ASTM D-412
Modulus at 300% 20 114 ASTM D-412
Elongation , Kg/cm2 40 144 ASTM D-412
Elongation , Kg/cm2 60 165 ASTM D-412
Hardness, Durumeter A, points 20 78 ASTM D-2240
Hardness, Durumeter A, points 40 79 ASTM D-2240
Hardness, Durumeter A, points 60 79 ASTM D-2240
Tear Strength, Die C, Kg/cm 40 66 ASTM D-624
Fuel C permeability coefficient mg.mm/cm2.d 40 16.6 ASTM D-814

Cured @ 150°C×40 minutes

IRM 901 Oil Immersion , @100°C×70hrs TYPICAL VALUE TEST METHODS
Tensile strength change, % -9 ASTM D-471
Elongation change, % -27 ASTM D-471
Hardness change, points +1 ASTM D-471
Volume change, % -0.96 ASTM D-471

 

IRM 903 Oil Immersion , @100°C×70hrs TYPICAL VALUE TEST METHODS
Tensile strength change, % -10 ASTM D-471
Elongation change, % -26 ASTM D-471
Hardness change, points 0 ASTM D-471
Volume change, % +2.5 ASTM D-471

 

Test Tube Heat Aging @100°C×70hrs TYPICAL VALUE TEST METHODS
Tensile strength change, % -7 ASTM D-865
Elongation change, % -25 ASTM D-865
Hardness change, points +3 ASTM D-865

Packaging & Availability

Packaging Type