MASTIC COMPOSITION, FIRE PROTECTION GLAZING AND PROCESS FOR PREPARING THE SAME

摘要

The invention relates to a mastic composition, used for manufacturing a spacing frame for multiple or layered fireproof glazings. The composition comprises 40 ... 65% by weight polyisobutylene, 10 ...25% by weight of carbon black and 10 ...40 % by weight of a filler and it is chosen so that the butyl polymer in the composition exhibits a transverse or shear modulus of G* of 1.2 ... 2.2 MPa at a temperature of 80A C. The fireproof glazings comprise two window panes spaced by a supporting frame, comprising a first string applied by extrusion, on the peripheral edge of a window pane. According to the invention, said string is made of mastic composition.