| 摘要 |
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%. |
