← Back to Patent Explorer
EP0138121A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Moulding composition based on vinyl chloride polymers and process for preparing films from these moulding compositions for the preparation of securities protected against falsification

Assignee: Hoechst AG
•
Filing: 1984-09-28
•
Granted: —
•
Expires: 2004-09-28
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract Translated from German Die neuen Formmassen mit Vinylchloridpolymerisat als Hauptbestandteil enthalten in einer jeweils spezifischen Menge bestimmte Schlagzähmacher, Polymethylmethacrylat und eine spezielle Cellulose, nämlich pulverförmige reine Cellulose mit einem durchschnittlichen Polymerisationsgrad von 300 bis 1000 und einem Teilchendurchmesser von maximal 0,09 mm. Diese Formmassen sind gut kalandrierbar. Die Folien eignen sich besonders gut für die Herstellung von fälschungssicheren, mittels Laser personalisierbaren Wertpapieren, zum Beispiel Kreditkarten. The new molding compounds with vinyl chloride polymer as the main constituent each contain, in a specific amount, certain impact modifiers, polymethyl methacrylate and a special cellulose, namely powdery pure cellulose with an average degree of polymerization of 300 to 1000 and a maximum particle diameter of 0.09 mm. These molding compositions are easy to calender. The films are particularly suitable for the production of tamper-proof, laser-personalizable securities, for example credit cards.

Inventors

  • 👤 Bernhard Wottka
  • 👤 Alfred Weindl

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-04 16:16
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/30; B29B7/34; B29B7/52; B29B7/56; B29B7/002; B29B7/007; B29C; B29C43/00; B29C43/003; B29C43/22; B29C43/24; C; C08; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; G; G06; G06K; G06K19/00; G06K19/06; G06K19/06009; G06K19/06046; B29K; B29K2027/00; B29K2027/06; B29K2105/00; B29K2105/06; B29K2105/16; B29L; B29L2007/00; C08L1/00; C08L1/02; C08L33/00; C08L33/04; C08L33/06; C08L33/10; C08L33/12

Claims Analysis

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

References Cited (Backward Citations)

GB2111910A Cited

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