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SPECIFICATION
Test Description | Specification | Result |
Purity | ≥99.5％ | 99.96％ |
Residual Acetone | ≤1500 ppm | 974 ppm |
Melting Point | 286-287.5℃ | 286.1-287.1℃ |
Color | White | White |
Acid（PMA） | ≤0.5％ | 0.11％ |
Impurity Content | ≤30 ppm | 20 ppm |
Particle Size | ≤ 150-600μm（≥90％） | 95％ |
DESCRIPTION
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.
Pyromellitic Dianhydride Production Methods:
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.
STORAGE
Pyromellitic Dianhydride Storage:
Tightly closed. Dry. Keep locked up or in an area accessible only to qualified or authorized persons.
25kgs cardboard drum
APPLICATION
Pyromellitic Dianhydride application:
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.
FAQ
A1: Free sample is available, you only need to pay freight.
A2: Usually it will cost about 5 days after delivery.
A3: You can contact us about your order details by E-mail, WhatsApp, Skype, etc.
A4: We will test the goods and issue COA before delivery
