ELECTROSTATIC COATING OF GLASS BOTTLES WITH POWDER CONTAINING EPOXIDE AND AMIDINE

摘要

An improved method is disclosed for the coating of glass bottles with transparent plastic film which film will withstand repeated cleaning. The method involves treating clean bottles with a silane size, preheating the bottles and then electrostatically applying a powder lacquer thereto, the powder lacquer containing one or more 1,2-epoxide compounds with at least one epoxide group per molecule and a lower melting point greater than 40.degree.C, and a hardener which is an amidine of the general formula wherein R denotes hydrogen, an alkyl or aryl group, R' denotes a cycloalkyl, heterocycloalkyl or R group, R" denotes an alkyl or aryl substituted alkylene or arylene group X denotes hydrogen or a group.