NOISE-REDUCING POLYMER INTERLAYERS Russian patent published in 2011 - IPC B32B17/06 B32B17/10 B32B27/30 B60J1/00 

FIELD: process engineering.

SUBSTANCE: invention relates to polymer interlayer of multilayer glass panel and to such panel made from multilayer glass. Proposed interlayer comprises three polymer sheets made from plastified poly(vinyl butyral). Amount of plastifier in plastified poly(vinyl butyral) of second polymer sheet exceed by, at least, 10 parts per 100 parts of polymer, the amount of plastifier in plastified poly(vinyl butyral) of first polymer sheet. Residual amount of hydroxyl groups in second polymer sheet is smaller by, least, 20 wt % than that in first polymer sheet. First and second polymer sheets are arranged back-to-back. Residual content of acetates in both first and second polymer sheets make less than 5 mole per cent. Third and second polymer sheets are arranged back-to-back. Amount of plastifier in plastified poly(vinyl butyral) of second polymer sheet exceed by, at least, 10 parts per 100 parts of polymer, the amount of plastifier in plastified poly(vinyl butyral) of third polymer sheet.

EFFECT: improved noise isolation properties of proposed panels.

36 cl, 3 tbl