Process for the dealkylation of t-butyl and t-amyl ethers on polymeric backbones
AssigneeThe Dow Chemical Company
InventorsDavid L. Wolfe, Arthur R. Sexton
Life of this patent
Estimating the term…
Abstract
In a process for removing --R groups, where --R is tertiary butyl or tertiary amyl, from a polymer containing the monomeric unit represented by the formula ##STR1## by contacting the polymer with a sulfonic acid, the improvement of contacting under essentially anhydrous conditions.
Claims12
In a process for removing at least one --R where --R is tertiary butyl or tertiary amyl from a polymer comprising one or more units represented by the formula ##STR4## by contacting at above about 90.degree. C the polymer, which is in the liquid phase, with a sulfonic acid, the improvement comprising contacting the polymer with the sulfonic acid under essentially anhydrous conditions of less than about 7 percent water based on the weight of the polymer.
Dependencies are inferred from the claim text.