Process for the preparation of etherified acetal polymers
AssigneeSocieta' Italiana Resine S.I.R. S.p.A.
InventorsPierino Radici, Sergio Custro, Paolo Colombo
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Abstract
The unstable terminal hydroxyl groups of acetal polymers are etherified in a liquid reaction medium in the presence of organic additives.
Claims19
A method for the etherification of the unstable terminal hydroxyl groups of an acetal polymer, which comprises bringing said acetal polymer into contact with an etherification reagent selected from the group consisting of orthoesters, epoxides and acetals in the presence of 4-(p-toluenesulphonamide) diphenylamine as an additive stabilizer and subsequently etherifying said acetal polymer in a liquid reaction medium at a temperature of from 50.degree. to 200.degree. C wherein said additive is present in an amount of from 0.05 to 5 parts by weight of said liquid reaction medium.
Dependencies are inferred from the claim text.