CTPB cas 586976-24-1 Carboxyl-Terminated Polybutadiene CTPB
Carboxyl-terminated liquid polybutadiene rubber is generally called CTPB for short. For there are carboxyl at both ends of the polymeric molecule, this polymer carries on the structurization along the carboxyl group, the distribution of the network is neat and without any free terminal. so it has excellent mechanical performance.
The carboxyl end groups can react with epoxy resin, which has a good toughening effect on epoxy resin. Compared with CTBN, CTPB has lower viscosity, better low-temperature performance and flexibility.
The product not only can be used in solid rocket propellant, but also can be used in elastomers, adhesives, sealing material, epoxy resin modification and electrical resistant material.
Packed in 50kg/drum, 180kg/drum, The storage period is 1 year.
Safety instructions:
Storage should be at cool, dry and ventilate. The best condition is among -20 ~ 38℃. Shelf life of 12 months, if expire, still used if up to standard through retest. When transportation should avoid rain, sunlight. Don’t mix with strong oxidizer.
|
item |
Indicator |
|
|
Grade 1 |
Grade 2 |
|
| Description |
Tan or light yellow transparence liquid, no visible micelle and mechanical impurities |
|
| viscosity(40℃), Pa.s |
≤15 |
≤12 |
| Carboxyl value,mmol/g |
0.40~0.47 |
0.43~0.52 |
|
Water content, % |
≤0.05 |
≤0.05 |
|
Molecular weight |
4100 - 4500 |
2800 - 3400 |
|
Functionality |
1.75 - 1.95 |
1.90 - 2.10 |
