LAYERED SHATTERPROOF GLASS AND POLYVINYLBENZENE FILM FOR MANUFACTURE THEREOF Russian patent published in 2006 - IPC B32B17/10 C03C27/12 C08L29/14 

FIELD: polymer materials.

SUBSTANCE: sound-insulation film for manufacturing layered shatterproof glasses contains 0.15-0.8 % water; 50-79.85% partially acetylated polyvinyl alcohol having 10-25% vinyl alcohol groups and 0-20% acetate groups; and 20-49.85% plasticizer. The latter contains 30 to 70 % by weight of (based on the total weight of plasticizer mixture) one or several poly(alkylene glycols) from group including poly(alkylene glycols) having general formula HO-(R-O)_nH wherein R represents ethylene, propylene, or butylene and n>5; block copolymers from ethylene and propylene glycols having general formula HO-(CH₂-CH₂-O)_n-(CH₂-CH(CH₃)-O)_mH wherein n>2, m>3, and (n+m)<25; derivatives of block copolymers from ethylene and propylene glycols having general formulas R₁O-(CH₂-CH₂-O)_n-(CH₂-CH(CH₃)-O)_mH and HO-(CH₂-CH₂-O)_n-(CH₂-CH(CH₃)-O)_m-R₁ wherein n>2, m>3, and (n+m)<25 and R₁ is organic residue with 1 to 15 carbon atoms; poly(alkylene glycol) derivatives having general formula R₁-O-(R₂-O)_nH wherein R₂ represents ethylene, propylene, or butylene and n ≥ 2, in which hydrogen atom of two terminal hydroxyl groups of poly(alkylene glycol) is substituted by organic residue R₁; and at least one plasticizer - the rest.

EFFECT: improved sound-insulation capacity of film even at ambient temperature.

1 dwg, 2 tbl, 11 ex