Ruifu Chemical is the leading supplier of Carboxylated-Terminated Liquid Acrylonitrile Rubber (CTBN) (CAS: 68891-46-3) with high quality. Ruifu Chemical has been supplying CTBN more than 15 years, can provide competitive price, excellent service. Purchase CTBN, please e-mail: alvin@ruifuchem.com
CTBN is a type of liquid rubber, which contains active carboxyl groups at both ends of the molecular chain, it has the performance of rereaction chain extension, widely used, and it is the best toughening agent for thermosetting resin. CTBN introduces acrylonitrile in the main chain, which has strong polarity, high and low temperature properties and stability, good blending with resin, strong oil resistance and excellent cracking resistance.
| Chemical Name |
Carboxylated-Terminated Liquid Acrylonitrile Rubber |
| Synonyms |
CTBN; Carboxyl Terminated Butadiene Nitrile Rubber; Carboxyl-Terminated Butadiene-Acrylonitrile; Carboxyl Terminated Liquid Nitrile Rubber; End-Carboxyl Liquid Nitrile Rubber; Poly(Butadiene-Co-Acrylonitrile), Dicarboxy Terminated; Poly(Acrylonitrile-Co-Butadiene), Dicarboxy Terminated; Carboxy-Terminated Liquid Nitrile Butadiene Rubber |
| Stock Status |
In Stock, Commercial Production |
| CAS Number |
68891-46-3 |
| Molecular Formula |
C7H9N |
| Molecular Weight |
107.16 g/mol |
| Flash Point |
113℃ |
| Density |
0.948 g/mL at 25℃ |
| Refractive Index n20/D |
1.515(lit.) |
| Storage Temperature |
Store Long-Term in a Cool and Dry Place |
| Shelf Life |
12 Months After Manufacturer Date, Retest After Expiration |
| COA & MSDS |
Available |
| Origin of Product |
Shanghai, China |
| Brand |
Ruifu Chemical |
| Items |
CTBN-1 |
CTBN-2 |
CTBN-3 |
CTBN-4 |
CTBN-4 |
| Appearance |
Light Yellow Viscous Liquid With No Visible Impurities |
| Viscosity (40ºC Pa.s) |
7~10 |
7~10 |
13~30 |
30~60 |
50~90 |
| Carboxyl Value (mol/kg) |
0.58~0.65 |
0.50~0.65 |
0.43~0.50 |
0.43~0.50 |
0.43~0.50 |
| Molecular Weight (×103) |
2.5~3.3 |
2.0~3.0 |
2.3~2.8 |
2.1~2.6 |
1.9~2.4 |
| Acrylonitrile Content % |
8.0~12.0 |
8.0~12.0 |
12.1~18.0 |
18.1~22.0 |
22.1~27.0 |
| Moisture, wt% |
≤0.05% |
≤0.05% |
≤0.05% |
≤0.05% |
≤0.05% |
| Volatile Content ,% ≤ |
≤2.0 |
≤2.0 |
≤2.0 |
≤2.0 |
≤2.0 |
Package: Fluorinated bottle, 20kg/drum, 50kg/drum, 170kg/drum, or according to customer's requirement.
Storage Condition: Keep the container tightly closed. Store in a cool, dry and well-ventilated warehouse away from incompatible substances. Keep away from sunshine; avoid fire and heat sources; avoid rain, avoid water / moisture. Stay away from strong oxidants.
Shipping: Deliver to worldwide by air, by sea, by FedEx / DHL Express. Provide fast and reliable delivery.
How to Purchase? Please contact Dr. Alvin Huang: sales@ruifuchem.com or alvin@ruifuchem.com
15 Years Experience? We have more than 15 years of experience in the manufacture and export of a wide range of high quality pharmaceutical intermediates or fine chemicals.
Main Markets? Sell to domestic market, North America, Europe, India, Korea, Japanese, Australia, etc.
Advantages? Superior quality, affordable price, professional services and technical support, fast delivery.
Quality Assurance? Strict quality control system. Professional equipment for analysis include NMR, LC-MS, GC, HPLC, ICP-MS, UV, IR, OR, K.F, ROI, LOD, MP, Clarity, Solubility, Microbial limit test, etc.
Samples? Most products provide free samples for quality evaluation, shipping cost should be paid by customers.
Factory Audit? Factory audit welcome. Please make an appointment in advance.
MOQ? No MOQ. Small order is acceptable.
Delivery Time? If within stock, three days delivery guaranteed.
Transportation? By Express (FedEx, DHL), by Air, by Sea.
Documents? After sales service: COA, MOA, ROS, MSDS, etc. can be provided.
Custom Synthesis? Can provide custom synthesis services to best fit your research needs.
Payment Terms? Proforma invoice will be sent first after confirmation of order, enclosed our bank information. Payment by T/T (Telex Transfer), PayPal, Western Union, etc.
Carboxylated-Terminated Liquid Acrylonitrile Rubber (CTBN) (CAS: 68891-46-3) is mainly used as a binder for solid rocket propellants. In addition, CTBN is an excellent toughening modifier for epoxy, phenolic, unsaturated polyester and photosensitive resins. And widely used in aerospace, electronic appliances, automotive high-speed rail, ships, light textile chemical industry and other fields of bonding, sealing, spraying, potting and coating.
CTBN is used to improve the toughness, flexibility, adhesion and impact resistance of thermoset resin systems including epoxies, vinyl esters, unsaturated polyesters, acrylics and urethanes. It improves durability and increases low temperature. The acrylonitrile content varies in these polymers from zero to 26% which directly affects the solubility and glass transition temperature (Tg) of the materials. CTBN is used in film and paste adhesives.
As the component of epoxy-based adhesives, composites and coatings, CTBN can be used as an intermediate in corrosion-resistant vinyl esters, acrylated epoxies used in radiation curing and photopolymer printing plates.