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China, Chinese Factory Sell CAS No. 89-32-7 Pmda Pyromellitic Dianhydride Crystal for Polyimide Foam1 Industrial Products Supplier Manufacturer Details, price list catalog:
China Industrial Products Supplier Manufacturer List Catalog
Chemical Auxiliary CatalystCoating Auxiliary AgentPmda ManufacturerPyromellitic Anhydride Factory
Hubei Highwin New Material Technology Co., Ltd
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Product Description Product Description1. Basic information and structureChemical name: Pyromellitic DianhydrideEnglish name: Pyromellitic DianhydrideMolecular formula: C10H2O6Molecular weight: 218.12Structural features: The molecule contains two anhydride groups (-CO-O-CO-), connected at the 1, 2, 4, and 5 positions of the benzene ring, forming a symmetrical rigid structure, which makes it highly reactive and stable.2. Physical and chemical propertiesPhysical properties:Appearance is white or slightly yellow crystalline powder, odorless.Melting point is about 286oC, boiling point is 397-400oC, and it is easy to sublime.Insoluble in cold water, soluble in hot water (hydrolyzed to pyromellitic acid), acetone, ethyl acetate, dimethylformamide (DMF) and other organic solvents.Chemical properties:The anhydride group is highly active and can undergo condensation reactions with amines, alcohols, phenols, etc. to generate derivatives such as imides and esters.It is corrosive to a certain extent and will slowly hydrolyze when exposed to water or humid air. It needs to be sealed and stored in a dry place.III. Main preparation methodsIn industry, it is mainly prepared by the oxidation of durene:Using durene (1,2,4,5-tetramethylbenzene) as the raw material, it is oxidized by air under the action of a catalyst (such as vanadium and titanium oxide) to produce pyromellitic acid.Pyromellitic acid is dehydrated and closed at high temperature to produce pyromellitic dianhydride, which is then purified (such as sublimation) to obtain a high-purity product.IV. Core application areasThe core value of PMDA lies in its role as a high-performance polymer monomer, especially in the following fields:Polyimide (PI) synthesis: The polyimide generated by the reaction with aromatic diamines has the characteristics of high temperature resistance (long-term use temperature 200-300oC), radiation resistance, and strong insulation. It is widely used in aerospace (high temperature resistant parts), electronics (flexible circuit boards, insulating films), new energy (lithium battery separators) and other fields.Coatings and adhesives: used to prepare high temperature and chemical corrosion resistant coatings (such as high temperature pipeline protection) and adhesives (such as metal-ceramic bonding).Composite material modification: used as a cross-linking agent to improve the mechanical properties and heat resistance of composite materials, and is used in high-end manufacturing fields. Product Parameters ItemTop GradeFirst GradeProduct NamePyromellitic Dianhydride;PMDA;1,2,4,5-Benzenetetracarboxylic Anhydride Content (w, %)≥99.5≥98.0CAS NO89-32-7 EINECS No.201-898-9 AppearanceWhite crystal powder Melting Point (oC)285-288283-286Free acid content0.5% max Neutralization Equivalent54.5±0.2 Specific Gravity1.68 Molecular Formula/ WeightC10H2O6/ 218.12 ApplicationUsed for making polyimide film, resin, powdery paint, delustering agent,advanced electrical insulation material,high temperature resistant electric insulating paint, PVC plasticizer, synthetic resin crosslinking agent and epoxy resin curing agent Detailed Photos Packaging & Shipping Company Profile Hubei Highwin New Material Technology Co., Ltd. focuses on the research and development, production and sales of epoxy resin and other chemical raw materials. We have our own R&D laboratory, by ordinating our suppiers all over the world and manufacturing products with cooperated based factories, we're keeping enhance our competitiveness in the market. Before developing overseas sales, we have been rooted in chemical raw materials for more than 20 years and have already been one of the top suppliers in China after years of efforts. There are a group of hard-working, motivated, and creative staff working not only for the company but also for you--our respectable customer and partner! Based on good service and high-quality products, we're widely praised and trusted by customers and keep long-lasting relationships with them. R&D Center FAQQ:How to get a sample, is it free?A:You can contact our sales staff through REQUEST and they will arrange sample shipment for you. We can provide you with free samples, you only need to pay for the shipping cost. For regular customers, sample fee and shipping fee are covered by us!Q:How can I trust you? How long have you been in this field(Chemical raw material)?A:Our owner has over 20 years of experience in the chemical raw materials field as well as our staffs. It is because of the trust of our customers and partners that we have been able to exist and develop for so many years. Our ever-lasting vision is to 'Obtain a wide range of customer resources through high-quality procurement and the best service, and establish a sustainable and stable customer relationship'!Q: Can you offer any other services?A:Yes! If you learn that there are very competitive products in China that are not within the scope of our display, we'd love to help you find quality resources. It's our honor to provide a one-stop purchasing service for you!Q:How do you guarantee the quality of your products?A:All of our products comply with national testing standards and international standards. If you need, we can provide you with certificates.Q: Can you use customer-specific labeling and packaging?A: Of course, you can provide us with the specified labeling and packaging and we will be happy to follow up with you.assist you. If there is anything else you need, please feel free to communicate with us!Q: How about the delivery time?A: We can’t give you the exact time because of different locations, but we can guarantee that we will ship your order as soon as possible after you place it and we will keep an eye on the logistics to remind you to receive the goods.
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