develop different version of CTBN Carboxyl terminated butadiene nitrile rubber(CTBN) CAS 25265-19-4 Carboxyl-Terminated Butadiene-Acrylonitrile CAS 68891-46-3
The liquid carboxyl-terminated butadiene acrylonitrile is one type of liquid rubber which has carboxyl group as it’s function group, and it’s code is CTBN, can be used generally in aviation and civil industrial areas. Normally CTBN is applied combined with somatotype resin. The CTBN which has active carboxyl-terminated group can react on epoxy resin so as to enhance the toughness.
1. Enhances the toughness and flexibility of thermoset resins
2. Improves adhesion to substrates that are difficult to bond to
3. Increases impact and crack resistance
4. Improves durability (fatigue resistance)
5. Increases low-temperature mechanical properties
6. FDA version available
1. CTBN is an excellent flexibility modifier for thermosetting resins like epoxy, phenolic, unsaturated polyester and photosensitive resins. It can improve brittleness resistance and cracking resistance of the final product.
2. The metallic adhesive made from epoxy resin which is modified by CTBN (acrylonitrile content is 25%), has good toughness, flexibility and fatigue resistance. It can be used to bond the components of plane, as well as organic glass and terylene belt. This adhesive also can be used as seeping adhesive of various cloth materials such as glass fiber, terylene and carbon fiber.
3. The adhesive which is produced from CTBN and epoxy resin can curing at normal temperature, can be used to bond aluminous materials, it will reach the highest adhesive intensity after 72 hours. The peel- intensity is 0.55MPa, and the cutting intensity is 26.7MPa. The electric element sealant material produced by CTBN modified epoxy, which enhance the cracking resistance ,will have no crack after 200 times recycling at the temperature between -55.0℃ to 150℃ .
4. The CTBN can be used as adhesive in grind and cutting wheel, it has the benefits of less adhesive but more abrasion resistance, as well as the performance of good polish, hot water resistance.
5. CTBN is mainly used as a binder for solid rocket propellants.
6. CTBN for Coatings (solution, powder, waterborne).
7. And other many kinds of usages
Packed in 50kg/drum, 170kg/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 |
CTBN-1 |
CTBN-2 |
CTBN-3 |
CTBN-4 |
CTBN-5 |
| Carboxyl value(mmol/g) |
0.45 - 0.55 |
0.55-0.65 |
0.45-0.65 |
0.65-0.75 |
0.5-0.7 |
| Appearance |
Amber Viscous liquid , no visible impurities |
||||
| Viscosity (27℃,Pa.S) |
≤180 |
≤150 |
≤300 |
≤200 |
≤600 |
| Acrylonitrile content,% |
8.0-12.0 |
8.0-12.0 |
18.0-22.0 |
18.0-22.0 |
24.0-28.0 |
| Moisture,wt% ≤ |
0.05 |
0.05 |
0.05 |
0.05 |
0.05 |
| Volatile Content,% ≤ |
1.0 |
1.0 |
1.0 |
1.0 |
1.0 |
| Molecular weight |
3600 - 4200 |
3000 - 3600 |
3000 - 3600 |
2500 - 3000 |
2800 - 4000 |
| * In addition：We can research and develop any new version of CTBN according to the special demand of our clients． | |||||
