CTBN is a carboxyl-terminated butadiene nitrile liquid rubber used as an epoxy toughener. It has reactive carboxyl end groups that can interact with epoxy systems during curing. After reaction and phase separation, CTBN forms a dispersed rubber phase inside the epoxy matrix, which helps absorb impact energy, resist crack propagation and improve fracture toughness. It is widely used in rubber-modified epoxy structural adhesives and high-performance composite matrices.

Product Detail

Product Detail PageChemical IdentityCTBN is a reactive liquid rubber based on butadiene nitrile copolymer with carboxyl end groups. It is a low-viscosity liquid polymer suitable for dispersion into epoxy resin systems. The carboxyl end groups can react with epoxy or curing agent components, helping to anchor the rubber phase at the interface. During cure, the rubber phase separates into small domains that act as toughening sites in the crosslinked epoxy network.

Key PerformanceCTBN significantly improves fracture toughness and impact resistance of cured epoxy. It enhances peel strength and structural joint reliability under dynamic load. The dispersed rubber phase absorbs stress and deflects or bridges cracks. It improves flexibility and damage tolerance without excessively reducing modulus in balanced formulations. It is particularly effective for high-performance structural epoxy systems.

ApplicationsCTBN is mainly used as a toughener for epoxy structural adhesives. Typical applications include industrial structural bonding, automotive assembly, aerospace composites, heavy-load adhesive joints and rubber-modified epoxy compounds. It is suitable for epoxy systems that require higher fracture toughness, peel strength and impact performance.

Storage & HandlingStore CTBN in sealed original containers in a cool, dry and ventilated warehouse. Recommended storage temperature 10-30℃. Avoid direct sunlight, heat sources and high humidity. Prevent skin contact and inhalation of vapour during handling. Use appropriate protective equipment. Once container is opened, reseal tightly after use. Do not store incompatible materials together.

Why Choose SupplierWe supply stable CTBN epoxy toughener for structural adhesive and composite manufacturers. Complete TDS and MSDS documents are available for export. Bulk shipment and small trial orders are supported. Our CTBN helps overseas factories develop rubber-modified epoxy structural adhesives with higher fracture toughness and impact reliability.

Previous : Epoxy Core-Shell Impact Modifier TMS-2670J, Acrylic Core-Shell for Epoxy Structural Adhesive Composite Next : Epoxy Silicone Toughener DMS, Epoxy/Polyether Modified Siloxane for EMC Stress Relief Flowability Chip Encapsulation

Copy product links

Long by picture save/share

Add Successfully

Continue To Visit Inquiry Now

CTBN Epoxy Toughener, Carboxyl-Terminated Butadiene Nitrile Rubber for Epoxy Structural Adhesive Rubber-Modified

enquiry

Add Successfully

Continue To Visit Inquiry Now

Jishengya Technology

Shenzhen Jishengya Technology Co., Ltd. is located in Shenzhen, a special economic zone, and is a comprehensive technology enterprise integrating independent R&D, production and sales.