← Back to Patent Explorer
EP0325989A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Process for producing polybenzamides

Assignee: Bayer AG
•
Filing: 1989-01-17
•
Granted: —
•
Expires: 2009-01-17
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract Translated from German Die Erfindung betrifft ein Verfahren zur Herstellung von Poly(1,4-benzamid) im Gemisch mit SiO₂ durch Polykonden­sation von 4-Aminobenzoesäure in Gegenwart von SiCl₄ in 1,3-Dimethyltetrahydro-2(1H)-pyrimidinon in Gegenwart von Salzen wie Lithiumchlorid oder Calciumchlorid. The invention relates to a process for the preparation of poly (1,4-benzamide) in a mixture with SiO₂ by polycondensation of 4-aminobenzoic acid in the presence of SiCl₄ in 1,3-dimethyltetrahydro-2 (1H) -pyrimidinone in the presence of salts such as lithium chloride or Calcium chloride.

Inventors

  • 👤 Manfred Spies
  • 👤 Walter Prof. Dr. Heitz

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-02 06:01
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J3/091; C08J3/096; C08G; C08G69/00; C08G69/02; C08G69/08; C08G69/12; C08J3/20; C08J2377/00; C08J2377/10

Claims Analysis

Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Maintenance schedule is calculated for granted US utility patents.

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag