Polyvinyl Formal: Polyvinyl Acetate Acetalised with Formalin, Shawinigan 1933

Polyvinyl acetate dissolved in glacial acetic acid, with formalin and a little sulfuric acid, kept stirred 24 hours at 70 °C, loses its acetate groups and takes up formaldehyde: polyvinyl formal, a hard, tough, pale resin. Shawinigan's patent (1933) gives the recipe; it is the resin of 'Formvar' magnet-wire enamel. The picture: our diagram of the reaction.

Advanced

24 hours, then drying

Hazardous content

This blueprint contains hazardous procedures. Log in and enable hazardous content in your account settings to view the step-by-step instructions.

This blueprint makes

Placeholder

Polyvinyl Formal

Free

Related Blueprints

These blueprints share knowledge with this one — techniques, materials, or principles that connect them in the learning graph.

Polyvinyl Acetate: Vinyl Acetate Set Solid by Sunlight

by Charlie

Polymer

Hazardous

Formalin: Methanol Oxidised over Silver

by Charlie

Industrial

CC0 Public Domain

This blueprint is released under CC0. You are free to copy, modify, distribute, and use this work for any purpose, without asking permission.

Support the Maker by purchasing products through their Blueprint where they earn a Maker Commission set by Vendors, or create a new iteration of this Blueprint and include it as a connection in your own Blueprint to share revenue.

Discussion

(0)

Loading comments...