"Cellular plastic" is a broad term that can refer to various types of plastic with a foamed structure. The specific chemicals used to create these plastics vary depending on the desired properties and the manufacturing process. Here are some common chemicals used in different types of cellular plastics:

1. Polystyrene (PS)

* Expandable polystyrene (EPS): This type of polystyrene is expanded by adding blowing agents like pentane or butane, which create the air pockets that make the plastic foam.

* Extruded polystyrene (XPS): XPS is extruded with a blowing agent, often pentane, to create a rigid foam.

2. Polyurethane (PU)

* Polyols: Polyols are the main component of polyurethane foam, and they react with isocyanates to create the foam structure.

* Isocyanates: Isocyanates are highly reactive chemicals that crosslink with polyols to form the polyurethane polymer.

* Blowing agents: Various blowing agents are used, including water, hydrocarbons, and fluorocarbons.

3. Polyvinyl chloride (PVC)

* Plasticizers: Plasticizers are added to PVC to make it more flexible and allow for foam formation. Common plasticizers include phthalates and adipates.

* Blowing agents: Blowing agents like azodicarbonamide, sodium bicarbonate, and hydrocarbons are used to create the foam structure in PVC.

4. Polyethylene (PE)

* Blowing agents: Blowing agents like butane and pentane are commonly used to create cellular polyethylene foam.

5. Other Cellular Plastics:

* Polypropylene (PP): Similar blowing agents to PE are used for PP foams.

* Polylactic acid (PLA): PLA foams are often created using water as a blowing agent.

Note: The specific chemicals used in cellular plastic production are constantly evolving as new technologies and regulations emerge. It is essential to consult the manufacturer's safety data sheets (SDS) for information on the specific chemicals used in any particular product.