Introduction To XNBR
XNBR Material Description
Introduction
Carboxyl nitrile rubber is made of ternary copolymerization of butadiene, acrylonitrile and organic acids (acrylic acid, methacrylic acid, etc.).
Referred to as XNBR, the relative density is 0.98~0.99. The introduction of carboxyl group increases polarity, increases the compatibility of NBR with PVC and phenolic resin, and imparts high strength.
It has good adhesion and aging resistance, improves wear resistance and tear strength, and further improves oil resistance.
Quality indicators
| Metric name | 1072 | 1072CG | 3245C | 3350X | DN631 | N3d |
|
Combined with acrylonitrile mass fraction/%≥ |
27 | 27 | 32 | 27 | 33 | 27 |
| Mooney viscosity | 48 ~ 63 | 22 ~ 35 | 45 | 50 | 45 | 45 |
Physical indicators
| Model | 1072 | 1072CG | 3350X |
| Acrylonitrile | 27 | 27 | 26 ~ 28 |
| Mooney viscosity | 48 ~ 63 | 22 ~ 35 | 40 ~ 55 |
Room temperature performance
Tensile strength mpa 39.7(5750) 26.8(3880) 18.2(2640)
100% Tensile Stress MPA 2.2(320) 9.3(1350) (490)
Elongation at break, % 490 280 270
Shore A hardness 73 85 72
Compression set (100°C*70H), % 95 20 11
Tear strength kn/m 36.8 47.3 35
High temperature performance
Tensile strength mpa 13.1 ( 190 ) 15.59 ( 2260 ) 5.79 ( 840 )
Tear off elongation, % 1000 290 160
Tear strength kn/m 7 ( 40 ) 21 . 02 （ 120 ） 14 ． 01 （ 80 ）
Scope of application
Carboxyl nitrile rubber can be used alone or in combination with other elastomers, mainly used in hoses, tape seals, O-rings, rubber rollers, rubber shoes and various molded products, oil well special products, epoxy resin toughening and special materials for the production of high-performance adhesive products.