BUTYRAL RESIN SHEET CONTAINING BIFUNCTIONAL SURFACE MODIFIER Russian patent published in 2009 - IPC C08J5/18 C08J7/04 C08L29/14 B32B17/10 

FIELD: chemistry.

SUBSTANCE: invention refers to butyral resin sheets with improved blocking resistance. Butyral resin sheet contains bifunctional surface modifier covering plastificised butyral resin sheet surface. Bifunctional surface modifier includes block-resistant segment and compatible segment. Herewith bifunctional modifier includes amphiphilic block polymer polyethylene-poly(ethylene glycol) of general formula CH₃CH₂(CH₂CH₂)_m-(OCH₂CH₂)_mOH, where m is approximately 5 to 24, and n is approximately 3 to 30. Method for making polymer sheet with improved blocking resistance includes processing polymer in melt thus making a sheet, and coating polymer sheet surface with surface bifunctional modifier. Laminated nonshattering glass contains two glass sheets and intermediate polymer sheet covered with bifunctional surface modifier.

EFFECT: improved blocking resistance of butyral resin sheet with maintaining optical transparency and glass adhesion while butyral resin sheet is introduced in laminated nonshattering glass.

16 cl, 5 tbl, 4 ex