Carboxyl-terminated Polybutadiene Acrylonitrile Liquid Rubber/ CTBN/ Carboxyl-terminated Butadiene Acrylonitrile
Carboxyl-Terminated Polybutadiene Acrylonitrile (CTBN) Liquid Rubber
Carboxyl-terminated polybutadiene acrylonitrile liquid rubber (CTBN) is a unique type of liquid rubber combining polybutadiene and acrylonitrile, featuring carboxyl functional groups at the chain ends. This modification significantly enhances its compatibility, leading to improved adhesion and streamlined processing.
Key Benefits:
- Enhanced Adhesion: Carboxyl termination promotes strong bonding to various substrates.
- Improved Compatibility: The combination of polybutadiene and acrylonitrile offers broad compatibility with other polymers and additives.
- Versatile Processing: Liquid form allows for easy mixing and application in diverse processes.
- Enhanced Impact Resistance: Polybutadiene component contributes to improved flexibility and impact resistance in final products.
Target Industries and Applications: Adhesives, Sealants, Coatings, Composites, and Elastomers.
Technical Specifications
| Property | Specification |
|---|---|
| Chemical Structure | Copolymer of polybutadiene and acrylonitrile with carboxyl termination |
| Appearance | Viscous liquid, typically amber to dark brown |
| Viscosity | Varies depending on molecular weight; typically medium to high viscosity |
| Density | Approximately 1.0 - 1.1 g/cm³ |
| Functional Groups | Carboxyl (-COOH) groups at chain ends |
| Temperature Range | -40 °C to +100 °C |
| Solubility | Soluble in organic solvents; limited solubility in water |
| Acid Number | Typically 20-50 mg KOH/g |
| Molecular Weight | Varies (usually between 10,000 to 100,000 g/mol) |
| Cure Type | Typically cured with isocyanates or other crosslinking agents |
| Storage Conditions | Store in a cool, dry place, away from light |
| Shelf Life | Typically 1-2 years when stored properly |
Carboxyl-Terminated Polybutadiene Acrylonitrile Liquid Rubber (CTBN)
Product Introduction
Carboxyl-Terminated Polybutadiene Acrylonitrile (CTBN) is a specialized liquid rubber known for its outstanding flexibility, toughness, and adhesion properties. CTBN is widely used as a toughening agent in epoxy formulations and other resins to enhance mechanical performance and improve impact resistance. Its carboxylic acid end groups allow for effective chemical bonding with other materials.
Physical and Chemical Specifications
| Property | Specification |
|---|---|
| Chemical Name | Carboxyl-Terminated Polybutadiene Acrylonitrile |
| CAS Number | Not specified |
| Molecular Formula | Varies |
| Appearance | Viscous liquid, typically yellowish or amber |
| Viscosity | Moderate to high viscosity |
| Solubility | Soluble in organic solvents, insoluble in water |
| Glass Transition Temperature (Tg) | Varies by formulation |
Product Functions
- Toughening Agent: Provides enhanced impact resistance and flexibility to epoxy and polyurethane systems, making them suitable for demanding applications.
- Chemical Reactivity: The carboxyl end groups facilitate chemical bonding with other polymer systems, improving overall performance.
- Adhesion Promoter: Improves adhesion properties in various formulations, ensuring strong bonding between layers or substrates.
- Compatibility Agent: Enhances compatibility with other polymers and resins, allowing for more versatile formulation options.
Application Areas
- Adhesives and Sealants: Commonly used in the formulation of high-performance adhesives for automotive, aerospace, and industrial applications.
- Composite Materials: Incorporated in composites, including fiber-reinforced plastics, to enhance toughness and flexibility.
- Coatings: Utilized in coatings requiring superior impact resistance and flexibility, especially in harsh environments.
Manufacturing Process
- Synthesis: CTBN is manufactured through the polymerization of butadiene and acrylonitrile, followed by carboxyl terminating to achieve the desired functional properties.
- Purification: The product undergoes purification processes to remove unreacted monomers and achieve high-quality standards.
- Quality Control: Each batch is rigorously tested for viscosity, carboxyl content, and mechanical performance.
Why Choose Us
- High Quality: Our CTBN is produced to meet stringent quality standards, ensuring consistent performance in various applications.
- Versatile Applications: Suited for a wide range of industries, including automotive, aerospace, and marine.
- Expert Support: Our knowledgeable team provides technical assistance and formulation guidance tailored to your needs.
- Sustainability Commitment: Focused on environmentally responsible practices in sourcing and manufacturing.
FAQ
Q1: What is Carboxyl-Terminated Polybutadiene Acrylonitrile (CTBN)?
A1: CTBN is a liquid rubber known for its toughness and flexibility, often used to enhance the mechanical properties of epoxy and polyurethane systems.
Q2: Is CTBN safe for use in consumer products?
A2: Yes, CTBN can be safely used in formulations following regulatory guidelines; however, specific safety data should be consulted.
Q3: How is CTBN incorporated into formulations?
A3: CTBN is typically blended into resin systems during the formulation process to ensure optimal mixing and effectiveness.
Q4: What are the typical usage levels for CTBN?
A4: Typical concentrations range from 5% to 20%, depending on the desired properties and specific application needs.
Q5: Can CTBN be used in waterborne formulations?
A5: CTBN is generally used in solvent-based systems; modifications might be necessary for compatibility with waterborne systems.
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