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256439

Sigma-Aldrich

4,4′-亚甲基双(异氰酸苯酯)

98%

同義詞:

4,4′-MDI, 二苯基甲烷-4,4′-二异氰酸酯

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About This Item

線性公式:
CH2(C6H4NCO)2
CAS號碼:
分子量::
250.25
Beilstein:
797662
EC號碼:
MDL號碼:
分類程式碼代碼:
12162002
PubChem物質ID:
NACRES:
NA.23
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品質等級

化驗

98%

形狀

solid

反應適用性

reagent type: cross-linking reagent

bp

200 °C/5 mmHg (lit.)

mp

42-45 °C (lit.)

密度

1.18 g/mL at 25 °C (lit.)

儲存溫度

−20°C

SMILES 字串

O=C=Nc1ccc(Cc2ccc(cc2)N=C=O)cc1

InChI

1S/C15H10N2O2/c18-10-16-14-5-1-12(2-6-14)9-13-3-7-15(8-4-13)17-11-19/h1-8H,9H2

InChI 密鑰

UPMLOUAZCHDJJD-UHFFFAOYSA-N

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一般說明

4,4′-亚甲基双(异氰酸苯酯)(MDI) 是一种芳香族二异氰酸酯类单体,广泛应用于聚氨酯塑料、绝热泡沫、涂料、粘合剂和密封剂的生产。由于两个异氰酸酯官能团的存在,它具有很高的反应活性。MDI以良好的强度、耐用性和耐化学和环境损伤而著称,这些性质使其可用于树脂组合物、平版印刷版、涂层膜、光学膜、图像显示设备、半导体设备和聚氨酯泡沫生产。

應用

4,4′-亚甲基双(苯基异氰酸酯)可用作起始材料来合成:
  • 适用于医疗植入物的聚氨酯阳离子聚合物。[1]
  • 一种用于制备自愈合聚氨酯弹性体的预聚物。[2]
它还可作为交联剂用于合成具有改善的机械性能的 PEBA(聚醚嵌段酰胺)共聚物,这种聚合物主要用于鞋底、医用管、航天部件和化学分离。此外,MDI 也可作为交联剂用于共价修饰氧化石墨烯(GO),并可增强聚苯烯涂层的耐腐蚀性。由此产生的聚苯乙烯GO-MDI复合涂层的耐磨性优于未修饰聚苯烯涂层。这种方法可用于改善各种工业和生物医学应用中材料的耐用性。[3][4]

象形圖

Health hazardExclamation mark

訊號詞

Danger

危險分類

Acute Tox. 4 Inhalation - Carc. 2 - Eye Irrit. 2 - Resp. Sens. 1 - Skin Irrit. 2 - Skin Sens. 1 - STOT RE 2 Inhalation - STOT SE 3

標靶器官

Respiratory system

儲存類別代碼

11 - Combustible Solids

水污染物質分類(WGK)

WGK 1

閃點(°F)

411.8 °F - closed cup

閃點(°C)

211 °C - closed cup

個人防護裝備

dust mask type N95 (US), Eyeshields, Faceshields, Gloves


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Questions

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  1. How can I determine the shelf life / expiration / retest date of this product?

    1 answer
    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer
    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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