MULTILAYER COMPOSITION MATERIAL FOR BULLET-PROOF GLAZING Russian patent published in 1996 - IPC

FIELD: shock-resistant composition materials. SUBSTANCE: intermediate layers between silicate glasses were made of polyvinylbutyral film and/or composition consisting of, mas. p.: butylacrylate 30-33; butylmethacrylate 65-67; acrylic acid 2-3 per 100 monomers mixture of ethylene glycol dimethacrylic ester 0.1-0.2; methylmethyldiethoxysilane methacrylate 0.1-0.5 and dicyclohexylperoxydicarbonate 0.05-0.08. Intermediate layer between external and internal glazing members is made of composition consisting of, mas. p.: butylacrylate 50-53; butylmethacrylate 45-47; acrylic acid 2-3 per 100 monomers mixture of triallyl(iso)cyanurate 0.5-1.0; methylmethyldiethoxysilane methacrylate 0.05-0.1 and dicyclohexylperoxydicarbonate or its mixture with 0.15-0.2 benzoine 0.1-0.15. Thickness of each silicate layer, internal member, each intermediate layer between silicate glasses and intermediate layer between external and internal member is 3-6, 10-25, 0.76-2.0 and 0.3-4 mm, respectively. EFFECT: enhanced quality of composition. 1 tbl