Process for the production of modified, partially acetalised...

Details Process for the production of modified, partially acetalised... Process for the production of modified, partially acetalised...

C - Chemistry, Metallurgy

08

K

400/9230

C08K 5/54 (2006.01) B32B 17/10 (2006.01) C08L 29/14 (2006.01)

Patent

CA 1076285

ABSTRACT OF THE DISCLOSURE: This invention relates to a process for adjusting the bond strength of a plasticizer-containing partially acetalized polyvinyl alcohol film used for bonding inorganic glasses, to the pummel values required for vehicle windscreens or safety window panes. This process comprises the step of adding a predetermined quantity of: a) a silicon-functional silane to reduce the bond strength, preferably of the general formula: Image or a mixture of different silicon-functional silanes, or b) a silicon-organo functional silane to increase the bond strength, preferably of the general formula: Image or a mixture of silicon-organo functional silanes, or c) a mixture of at least one silicon-functional silane with at least one silicon-organo functional silane, to the partially acetalized polyvinyl alcohol resin before or during its processing to form the film.

221033

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