Process for the production of a plasticized polyvinyl butyral fo

Details Process for the production of a plasticized polyvinyl butyral fo Process for the production of a plasticized polyvinyl butyral fo

1991-07-24

1993-02-16

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524299, 524742, 524747, 525 61, C08L 000

Patent

active

051872170

ABSTRACT:
Process for the production of a plasticized polyvinyl butyral particularly used for gluing a base onto glazings. The polyvinyl butyral is obtained by the reaction of a butyric aldehyde with a polyvinyl alcohol, demonstrating a level of hydrolysis greater than 95%, and a viscosity greater than 50 cP, in the presence of an acid catalyst and an emulsifier, the quantity of butyric aldehyde being such that the level of hydroxylation of the polyvinyl butyral obtained is between 22 and 26%.

REFERENCES:
patent: 2345946 (1944-04-01), Overbaugh
patent: 3153009 (1964-10-01), Rombach
patent: 4533697 (1985-08-01), Degeilh

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