FIREPROOF POLYMER SHEETS Russian patent published in 2012 - IPC B32B17/10 B32B27/08 B32B27/22 C03C27/12 

FIELD: process engineering.

SUBSTANCE: invention relates to multiplayer glass panel to be fitted in wall opening and car windows. Proposed panel comprises fireproof panel. Note here that the latter consists, in fact of: two glass layers and sheet of thermoplastic butyral resin arranged there between. Note here that said thermoplastic butyral resin comprises residual amount of polyvinyl alcohol varying from 17 wt % to 50 wt % and plasticiser representing monomer phosphate ether of R₃PO₄ formula wherein R is selected from the GROUP consisting of aryl, alkyl aryl wherein alkyl GROUP contains 1 to 3 atoms of carbon; alkyl containing 1 to 12 atoms of carbon; alcoxyalkyl containing 1 to 9 atoms of carbon and cycloalkyl. Invention covers also aforesaid fireproof panel and interlayer of multilayer glass panel.

EFFECT: higher fire resistance.

40 cl, 8 ex, 3 tbl