Two reactive handles
The C=C bond copolymerizes and the anhydride ring esterifies, so one raw material serves UPR, alkyd, rosin and copolymer chemistry.
MA
Anhydride maléique (MA) Fournisseur de Chine
L'anhydride maléique (MA) is the reactive building block for unsaturated polyester resins, alkyd resins, maleic rosin and styrene–maleic anhydride copolymers, and an intermediate for agrochemicals such as malathion. SUNCHEM supplies MA to resin, coating and synthesis users with a batch COA on every shipment.
CAS 108-31-6 · C₄H₂O₃ · 2,5-Furandione
- Lot de COA avec chaque expédition
- Des échantillons pour vos essais
- Support technique pour votre essai
Présentation du produit & avantages clés
Maleic anhydride combines a reactive double bond with an anhydride group, so it can both copolymerize and esterify. In unsaturated polyester resin (UPR) it supplies the unsaturation that styrene later crosslinks; in alkyds, maleic rosin and coatings it adds acid functionality; with styrene it forms SMA copolymers. It is also the starting point for maleic and fumaric acid, succinic and tetrahydrophthalic anhydride, anhydride polymaléique, and pesticides such as malathion.
For resin makers, pureté, color and free maleic acid are the numbers that decide resin color and reactivity.
Sets resin reactivity
The MA share in a UPR recipe controls how much unsaturation styrene can crosslink, and with it the cured hardness and heat resistance.
Spécifié selon vos conditions
We quote against your purity, color and maleic-acid limits and send the batch COA for each lot.
Spécifications techniques
| Paramètre | Valeur typique |
|---|---|
| Nom du produit | Anhydride maléique (MA) |
| Synonymes | 2,5-Furandione; cis-butenedioic anhydride |
| Numéro CAS. | 108-31-6 |
| Numéro CE. | 203-571-6 |
| Formule moléculaire | C₄H₂O₃ |
| Poids moléculaire | 98.06 |
| Apparence | Solide blanc (flakes, briquettes or pastilles) |
Pureté, Couleur, free maleic acid and ash limits depend on the producer grade and are stated on the TDS and batch COA; les limites de votre commande sont confirmées dans le devis et le contrat.
Applications par industrie
Where maleic anhydride is used, et que confirmer avant de changer d'approvisionnement.
Unsaturated polyester resins
The largest use. MA is esterified with glycols, often alongside phthalic or isophthalic anhydride, to give the unsaturated backbone that styrene crosslinks in FRP, gelcoats, artificial stone and putties.
Vérifiez avant l'essai
- Resin type (ortho, iso, DCPD) and color target
- Purity and free maleic-acid limits
- Delivery form and monthly volume
Alkyd resins, colophane maléique & revêtements
Adds acid functionality to alkyd resins, and reacts with rosin to make maleic rosin for printing inks, paper size and coatings.
Vérifiez avant l'essai
- Resin or ink type
- Color target
- Bag size that suits your charging
SMA copolymers & additifs polymères
Copolymerized with styrene to make SMA resins, polymerized to polymaleic anhydride for water treatment, and grafted onto polyolefins to make compatibilizers.
Vérifiez avant l'essai
- Polymer route and initiator system
- Purity required for your polymer grade
- Sample size for a pilot run
Agrochemical & chemical intermediates
An intermediate for malathion and other agrochemicals, and for maleic acid, acide fumarique, succinic anhydride and tetrahydrophthalic anhydride.
Vérifiez avant l'essai
- Synthesis route and impurity limits
- Documente les besoins de votre équipe d'assurance qualité
- Volume annuel
Sélection & comparaison
Choosing the right MA grade
| Votre exigence | Ce qui fonctionne habituellement |
|---|---|
| General-purpose UPR and alkyd resins | Standard industrial-grade MA |
| Light-colored resins and gelcoats | Specify low color and free maleic-acid limits |
| Bagged charging into batch reactors | Solid MA — flakes, briquettes or pastilles |
| Remplacer un fournisseur existant | Envoyez votre TDS ou COA actuel; nous citons en fonction des paramètres que vous approuvez |
Emballage & stockage
Emballage
Pack size depends on the form (flakes, briquettes or pastilles). Tell us your bag size and pallet requirements with your inquiry.
Stockage
Keep bags closed in a cool, sec, ventilated store. Moisture turns MA into maleic acid, and the dust is a skin and respiratory sensitizer — follow the SDS.
Transport
Regulated for transport as a corrosive (ET 2215, Classe 8, GE III).
Du premier e-mail à la fourniture approuvée
Name the resin or product
UPR, alkyd, rosin, copolymer or an intermediate: tell us which one, because color and maleic-acid limits differ.
Comparez les chiffres qui comptent
Pureté, Couleur, free maleic acid, ash and iron. Ask for the same parameters on our COA that appear on your incoming-inspection sheet.
Protect the material
MA picks up moisture. Check bag integrity on arrival and keep opened bags sealed, or the maleic-acid content will rise.
Procès, puis verrouillez la spécification
Analysez un échantillon dans votre propre processus et conservez le COA du lot approuvé comme référence pour les limites du contrat..
Dites-nous votre besoin. Nous correspondons à la note.
Tell us the resin or product you make, la quantité et le port de destination. Ajoutez vos spécifications actuelles et nous établirons un devis en fonction de celles-ci.
| Information | Exemple |
|---|---|
| Application | UPR, alkyd, colophane maléique, SMA, intermédiaire |
| Spécification requise | Pureté, Couleur, free maleic acid |
| Formulaire & conditionnement | Flakes, briquettes or pastilles; bag size |
| Quantité | Commande à l'essai / mensuel / volume annuel |
| Destination | Pays et port |
| Documents nécessaires | COA, FDS, DT, Déclaration REACH |
Produits associés
Gamma-Butyrolactone
Solvent and intermediate made from maleic anhydride by hydrogenation.
Voir le produit →Anhydride maléique (MA) FAQ
What is maleic anhydride used for?
Mainly for unsaturated polyester resins. It is also used in alkyd resins, colophane maléique, SMA copolymers, anhydride polymaléique, and as an intermediate for malathion, maleic acid, fumaric acid and succinic anhydride.
Quels paramètres dois-je comparer entre les offres?
Pureté, Couleur, free maleic acid, ash and iron. For light-colored resins, color and maleic acid usually matter most.
How should maleic anhydride be stored?
In closed bags in a cool, sec, ventilated store. It reacts with moisture to form maleic acid and is a skin and respiratory sensitizer, so follow the SDS for handling.
Is maleic anhydride dangerous goods?
Oui. It is regulated as a corrosive for transport under UN 2215, Classe 8, GE III.
