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EP0133090A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

High optical quality transparent plastics film

Assignee: Saint Gobain Glass France SAS
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Filing: 1984-07-10
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Granted: —
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Expires: 2004-07-10
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Abstract

Abstract Translated from French L'invention concerne une feuille en matière plastique transparente de haute qualité optique. La feuille selon l'invention comprend une couche ayant des propriétés d'absorbeur d'énergie formée essentiellement d'un polyuréthane obtenu par coulée réactive sur un support plan horizontal, d'un mélange réactionnel d'un composant isocyanate viscosité inférieure à 5000 centpoises à - 40°C et d'un composant polyol, le composant isocyanate comprenant au moins un diisocyanate aliphatique ou cycloaliphatique ou un prépolymère d'isocyanate, le composant polyol comprenant au moins un polyol long difonctionnel de masse moléculaire comprise entre 500 et 4000 et au moins un diol court en tant qu'agent d'allongement de chaine. La feuille peut être utilisée dans les vitrages feuilletés notamment les pare-brise de véhicule. The invention relates to a transparent plastic sheet of high optical quality. The sheet according to the invention comprises a layer having energy absorbing properties formed essentially of a polyurethane obtained by reactive casting on a horizontal plane support, of a reaction mixture of an isocyanate component viscosity less than 5000 centpoise at - 40 ° C and a polyol component, the isocyanate component comprising at least one aliphatic or cycloaliphatic diisocyanate or an isocyanate prepolymer, the polyol component comprising at least one difunctional long polyol of molecular weight between 500 and 4000 and at least a short diol as a chain extender. The sheet can be used in laminated glazing, in particular vehicle windshields.

Inventors

  • 👤 Jean-Louis Bravet
  • 👤 Daniel Colmon
  • 👤 Gérard Daude
  • 👤 Michel-Jean Moncheaux

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-06 18:11
CPC Classifications
B; B29; B29C; B29C41/00; B29C41/02; B29C41/12; C; C08; C08J; C08J5/00; C08J5/18; B29C41/24; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/1055; B32B17/1077; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/65; C08G18/66; C08G18/6603; C08G18/6607; C08G18/6611; C08G18/70; C08G18/72; C08G18/74; C08G18/75; C08G18/751; C08G18/752; C08G18/753; C08G18/755; C08G18/77; C08G18/78; C08G18/7806; C08G18/7818; C08G18/7825; C08J2375/00; C08J2375/04; C08J2375/08

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

US4103070A Cited
FR2398606A1 Cited
FR2385751A1 Cited
FR2442128A1 Cited
GB2074940A Cited
EP0054491A1 Cited
DE3135672A1 Cited

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