Hydroquinone → 1,2-Diethenylbenzene

HRID 621395

Reaktionsgleichung

Reaktionsgleichung von HRID 621395
C1[CH:5]2[CH:6]3[CH:10]=[CH:9][CH:8]([CH:4]2[CH:3]=[CH:2]1)[CH2:7]3.[C:11]1(O)C=CC=CC=1.C([O-])(=O)C.C([P+](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)C.C(O)(=O)C(C)=C.C1(C=CC(O)=CC=1)O>C=CC1C=CC=CC=1>[CH:7]([C:8]1[CH:9]=[CH:10][CH:6]=[CH:5][C:4]=1[CH:3]=[CH2:2])=[CH2:11]

Komponenten

7

Edukt 5

HCID 785HydroquinoneHCID 996PhenolHCID 4093Methacrylic AcidHCID 6492DicyclopentadieneHCID 94470Ethyltriphenylphosphonium acetate

Produkt 1

HCID 666661,2-Diethenylbenzene

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 7501StyreneLösungsmittel

Versuchsvorschrift

A reactor is charged with 600 g of an epoxy resin prepared from dicyclopentadiene and phenol having an average functionality of about 3.2 and an epoxide equivalent weight (EEW) of 265. The resin is heated at 120° C. for 1 hour with 0.43 g of a 70 weight percent methanolic solution of ethyltriphenylphosphonium acetate.acetic acid complex catalyst with a nitrogen sparge. To the resulting mixture is added 200 g of the diglycidyl ether of bisphenol A having an EEW of 179 thereby forming a homogeneous solution having an EEW of 208. The mixture of epoxy resins is reacted catalytically with a stoichiometric equivalent amount (322 g) of glacial methacrylic acid in the presence of air and 400 ppm hydroquinone at 100° C. to 115° C. until a 1.1% acid concentration is reached. The vinyl ester resin is dissolved in 508 g of styrene and 127 g of divinyl benzene to yield a blend containing about 36 percent monomeric diluent by weight. The diluent contained 80% by weight styrene and 20% by weight divinylbenzene.

Aufarbeitung

  1. customacetic acid complex catalyst with a nitrogen sparge
  2. additionTo the resulting mixture is added 200 g of the diglycidyl ether of bisphenol A having an EEW of 179
  3. customthereby forming a homogeneous solution

Quellen und Nachweise

ORD-Eintrag
ord-61b961003bca40aa8f4328879d0b5e2c
Quelldatensatz
uspto-grants-1989_04
Patentnummer
US04824500

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