Methacrylic Acid → 2-Methylprop-2-enoic acid;styrene

HRID 2108142

Reaktionsgleichung

Reaktionsgleichung von HRID 2108142
[C:1]([OH:6])(=[O:5])[C:2]([CH3:4])=[CH2:3].[CH2:7]=[CH:8][C:9]1[CH:14]=[CH:13][CH:12]=[CH:11][CH:10]=1.C(C1C=CC=CC=1)C>O>[CH2:7]=[CH:8][C:9]1[CH:14]=[CH:13][CH:12]=[CH:11][CH:10]=1.[C:1]([OH:6])(=[O:5])[C:2]([CH3:4])=[CH2:3]

Komponenten

5

Edukt 3

HCID 4093Methacrylic Acid5×HCID 7500Ethylbenzene3×HCID 7501Styrene

Produkt 1

HCID 1657302-Methylprop-2-enoic acid;styrene

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 962WaterLösungsmittel

Reaktionsbedingungen

Temperatur
139 °C

Versuchsvorschrift

SMAA resin was produced by the same apparatus as used in Example 1 while methacrylic acid was fed so that the content of methacrylic acid in the SMAA resin formed in each polymerization vessel became 20% by weight. Specifically, a mixture composed of 70.8% by weight of styrene, 9.4% by weight of methacrylic acid and 20% by weight of ethylbenzene was fed continuously at a speed of 10 kg/hour into the first polymerization vessel kept at 139° C. Then, while the polymerization vessel which overflowed from the first polymerization vessel was conveyed to the second polymerization vessel maintained at 139° C, a mixture composed of 50% by weight of methacrylic acid and 50% by weight of ethylbenzene was continuously fed into the second polymerization vessel at a speed of 360 g/hour. Then, while the polymerization solution which overflowed from the second polymerization vessel was conveyed to the third polymerization vessel, a mixture composed of 50% by weight of methacrylic acid and 50% by weight of ethylbenzene was continuously fed into the third polymerization vessel. Then, water (2% by weight) was added to the polymerization solution which overflowed from the third polymerization vessel. The mixture was heated to 250° C by the preheater, and continuously fed into the solvent removing vessel maintained at 250° C and 20 torr to remove the solvent, and obtain styrene/methacrylic acid copolymer at a rate of 5 kg/ hour.

Aufarbeitung

  1. customSMAA resin was produced by the same apparatus
  2. customformed in each polymerization vessel
  3. customkept at 139° C
  4. customwas conveyed to the third polymerization vessel
  5. customwas continuously fed into the third polymerization vessel
  6. customoverflowed from the third polymerization vessel
  7. temperatureThe mixture was heated to 250° C by the preheater
  8. customremoving vessel
  9. temperaturemaintained at 250° C
  10. custom20 torr to remove the solvent

Quellen und Nachweise

ORD-Eintrag
ord-8777e6cf7a9a4c18b8f1f7cb41ad4810
Quelldatensatz
uspto-grants-1990_06
Patentnummer
US04937298

Verknüpfte Notizen

Wird geladen…