Usage / Application

Adipic dihydrazide (ADH) is a chemical compound primarily used in various industrial applications, including in the rubber industry. It is typically used as a crosslinking agent or a curing agent in rubber formulations, especially in the production of thermoset rubbers like nitrile rubber (NBR) and chloroprene rubber (CR).

1. Crosslinking Agent:

Adipic dihydrazide is commonly used in the production of crosslinked rubber products. Crosslinking refers to the process of chemically bonding polymer chains together, which improves the physical properties of the rubber, such as its heat resistance, tensile strength, and elasticity. Adipic dihydrazide can participate in the formation of crosslinks through reactions with other chemicals in the rubber matrix (such as sulfur or peroxide-based systems), enhancing the durability and performance of the rubber.

2. Cure Accelerator in Sulfur Curing Systems:

In the traditional sulfur curing systems for rubber, adipic dihydrazide can act as a cure accelerator. It helps to increase the rate of crosslinking, reducing the curing time needed to achieve the desired mechanical properties in the rubber. This can be particularly useful in high-throughput rubber manufacturing environments.

3. Modification of Rubber Properties:

ADH can be used to modify the properties of the rubber, such as improving its resistance to wear, aging, and oxidative degradation. It enhances the rubber's ability to perform in demanding applications, such as automotive parts, industrial seals, gaskets, and hoses.

4. Applications in Specific Rubber Types:

Nitrile Rubber (NBR): NBR is known for its oil and fuel resistance, and adipic dihydrazide can be used to improve its mechanical properties and resistance to heat and aging. ADH's ability to crosslink with NBR helps create more durable rubber products.

Chloroprene Rubber (CR): CR, or neoprene, is another rubber type where adipic dihydrazide is useful. It provides resistance to ozone, weathering, and aging, and when used in conjunction with other curing agents, it enhances the material’s overall performance.

5. Specialty Rubber Products:

Adipic dihydrazide is also used in specialty rubber formulations where advanced properties like flame resistance, low temperature flexibility, or enhanced chemical resistance are required. By modifying the polymer network, ADH helps create high-performance rubber products that meet specific industry demands.

6. Use in Thermoplastic Elastomers (TPEs):

Though less common, ADH can also be used in the production of thermoplastic elastomers (TPEs), where it helps achieve the right balance between elasticity and processability. TPEs are used in applications where flexibility and durability are important, such as in medical devices or consumer goods.