 |
Auto industry sealing ring, axle sleeve, bushing, elastic coupling, bumper, leather, seal, decorative plate Construction concrete mold, door strip, concrete pump components, sandblast pipe, etc Coated fabric conveyor belt, fuel storage tank, energy transmission belt, synchronous belt Electronic ... Leer más
|
| |
The difference between semi-prepolymer method and prepolymer method is that some polyester polyols or polyether polyols are added to the prepolymer in the form of mixture with chain extender and catalyst.In other words, (1) the formula of oligomer polyol is divided into two parts, one part and ... Leer más
|
