INTERLAYER FILM FOR LAMINATED GLASS AND LAMINATED GLASS Russian patent published in 2019 - IPC C03C27/12 B32B17/10 

FIELD: laminated products or materials.

SUBSTANCE: invention relates to an interlayer film for laminated glass. Interlayer film for laminated glass has a single-layer structure or a structure made up of two or more layer. Film comprises a first layer comprising a polyvinyl acetal polymer and a plasticiser, wherein the half-value width of hydroxy groups of the polyvinyl acetal polymer contained in the first layer is less than or equal to 250 cm^-1, and the content of the plasticiser contained in the first layer, relative to 100 pts.wt of the polyvinyl acetal polymer contained in the first layer is more than or equal to 5 pts.wt and less than 30 pts.wt. Film may also have a half-value width of hydroxy groups of the polyvinyl acetal polymer contained in the first layer of more than 250 cm^-1.

EFFECT: technical result is higher bending stiffness of laminated glass.

25 cl, 5 dwg, 3 tbl