Two reactive handles
The C=C bond copolymerizes and the anhydride ring esterifies, so one raw material serves UPR, アルキド, rosin and copolymer chemistry.
MA
無水マレイン酸 (MA) Supplier from China
無水マレイン酸 (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
- 出荷ごとのロット COA
- トライアル用のサンプル
- 試用版の技術サポート
製品概要 & 主な利点
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, ポリ無水マレイン酸, and pesticides such as malathion.
For resin makers, 純度, 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.
Specified on your terms
We quote against your purity, color and maleic-acid limits and send the batch COA for each lot.
技術仕様
| パラメータ | 代表値 |
|---|---|
| 製品名 | 無水マレイン酸 (MA) |
| 同義語 | 2,5-Furandione; cis-butenedioic anhydride |
| CAS番号. | 108-31-6 |
| EC No. | 203-571-6 |
| Molecular formula | C₄H₂O₃ |
| 分子量 | 98.06 |
| 外観 | 白い固体 (flakes, briquettes or pastilles) |
純度, 色, free maleic acid and ash limits depend on the producer grade and are stated on the TDS and batch COA; the limits for your order are confirmed in the quotation and contract.
Applications by Industry
Where maleic anhydride is used, and what to confirm before you switch supply.
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.
トライアル前に確認してください
- Resin type (ortho, iso, DCPD) and color target
- Purity and free maleic-acid limits
- Delivery form and monthly volume
Alkyd resins, マレイン酸ロジン & コーティング
Adds acid functionality to alkyd resins, and reacts with rosin to make maleic rosin for printing inks, paper size and coatings.
トライアル前に確認してください
- Resin or ink type
- カラーターゲット
- Bag size that suits your charging
SMA copolymers & ポリマー添加剤
Copolymerized with styrene to make SMA resins, polymerized to polymaleic anhydride for water treatment, and grafted onto polyolefins to make compatibilizers.
トライアル前に確認してください
- 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, フマル酸, succinic anhydride and tetrahydrophthalic anhydride.
トライアル前に確認してください
- Synthesis route and impurity limits
- Documents your QA team needs
- Annual volume
選択 & 比較
Choosing the right MA grade
| あなたの要件 | 通常機能するもの |
|---|---|
| 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 |
| Replacing an existing supplier | 現在の TDS または COA を送信します; we quote against the parameters you approve |
包装 & ストレージ
包装
Pack size depends on the form (flakes, briquettes or pastilles). Tell us your bag size and pallet requirements with your inquiry.
ストレージ
Keep bags closed in a cool, ドライ, ventilated store. Moisture turns MA into maleic acid, and the dust is a skin and respiratory sensitizer — follow the SDS.
輸送
Regulated for transport as a corrosive (と 2215, Class 8, PG III).
最初のメールから承認された供給まで
Name the resin or product
UPR, アルキド, rosin, copolymer or an intermediate: tell us which one, because color and maleic-acid limits differ.
重要な数字を比較する
純度, 色, free maleic acid, ash and iron. 受入検査シートに記載されているのと同じパラメータを COA で要求してください。.
Protect the material
MA picks up moisture. Check bag integrity on arrival and keep opened bags sealed, or the maleic-acid content will rise.
Trial, then lock the spec
Run a sample in your own process and keep the approved lot COA as the reference for contract limits.
ご要望をお聞かせください. グレードを合わせます.
Tell us the resin or product you make, the quantity and the destination port. Add your current specification and we will quote against it.
| 情報 | 例 |
|---|---|
| 応用 | UPR, アルキド, マレイン酸ロジン, SMA, intermediate |
| 要求仕様 | 純度, 色, free maleic acid |
| 形状 & 包装 | フレーク, briquettes or pastilles; bag size |
| 量 | お試し注文 / 毎月 / 年間生産量 |
| 行き先 | 国と港 |
| 必要な書類 | COA, SDS, TDS, REACH statement |
関連商品
無水マレイン酸 (MA) よくある質問
What is maleic anhydride used for?
Mainly for unsaturated polyester resins. It is also used in alkyd resins, マレイン酸ロジン, SMA copolymers, ポリ無水マレイン酸, and as an intermediate for malathion, maleic acid, fumaric acid and succinic anhydride.
Which parameters should I compare between offers?
純度, 色, 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, ドライ, 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?
はい. It is regulated as a corrosive for transport under UN 2215, Class 8, PG III.
