Views: 11 Author: Site Editor Publish Time: 2022-07-02 Origin: Site Inquire
What is Pyromellitic Dianhydride (PMDA)?
Pyromellitic Dianhydride (PMDA) is a white powder, soluble in some organic solvents; hydrolyzes to the acid when exposed to moisture. Pyromellitic Dianhydride (PMDA) is an acidic anhydride that can be used as a repair agent and as a chain extender in the formation of polyethylene terephthalate (PET) based chain extensions. It is mainly used in the production of thermoplastics and other coating applications.
What is Pyromellitic Dianhydride used for？
Pyromellitic Dianhydride (PMDA) has been used extensively as an important monomer in the preparation of a variety of thermoplastics such as polyesters, polycarbonates, polyethers polyethers, plasticizersplasticizers, expoxy resins, etc. Moreover, it is also useful in the preparation of high performance coatings that have been widely employed in many fields in our daily life beacuase of its excellent thermal, oxidative stability and excellent mechanical properties.
As an intermediate, it plays an important role in polyimide based materials like printed circuit boards, tape automated bonding and magnetic wire insulation.
What is the production method of Pyromellitic Dianhydride?
Pyromellitic Dianhydride is prepared by gas-phase oxidation of 1,2,4,5-tetramethylbenzene (or related tetrasubstituted benzene derivatives). An idealized equation is:
C6H2(CH3)4 + 6 O2 → C6H2(C2O3)2 + 6 H2O
In the laboratory, it can be prepared by dehydration of pyromellitic acid using acetic anhydride.
What is the solubility of Pyromellitic Dianhydride?
Pyromellitic Dianhydride is easily soluble in alcohols and slightly soluble in ether and water.
What is the danger of Pyromellitic Dianhydride？
Pyromellitic Dianhydride is toxic and can irritate lung, eye, nasal mucosa and skin, causing allergic reactions and other disorders.The operation site should be well ventilated, and operators should wear protective masks, protective glasses and relevant protective equipment.
What is the storage condition for Pyromellitic Dianhydride?
Pyromellitic Dianhydride is usually packaged in 25kg cardboard drum, stored in a cool, ventilated and dry place, heat, moisture, sunscreen, away from heat.
Where can I buy Pyromellitic Dianhydride? What is the price?
At Qi Di Chem, we sell Pyromellitic Dianhydride. The price of Pyromellitic Dianhydride usually varies depending on the price of the raw material. For the latest price, please contact us and we will provide a quotation suitable for your country/region. We export worldwide, so you can contact us at email address email@example.com for a free quote, or send a message on WhatsApp for a quick response +86-186-5121-5887.