EPOXY EXTERIOR COATING FOR LAP-SEAM BEVERAGE CANS

• Main Authors: DOWNS, JOHN D, MASSA, ANDREW L
• Format: Patent
• Language: English
• Published: 22.03.1977
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF MATERIALS THEREFOR; WOODSTAINS

1419296 Metal cans MOBIL OIL CORP 30 April 1973 [29 Sept 1972] 20424/73 Heading B8D [Also in Division C3] Metal containers are produced by bonding lap-seamed coated metal blanks with a nylon adhesive. The coating composition comprises a thermosetting resin prepared by (a) forming an epoxy material (I) having a molecular weight per epoxy group of 1600-2000 obtained by reacting a polyglycidyl ether of a bisphenol with additional bisphenol and further reacting the product with a mixture of fatty acids (II) comprising (by wt.) 25-55% oleic acid, 35- 65% linoleic acid and the balance conjugated linoleic acid; the weight ratio of I : II being 65 : 35 to 70 : 30. Using the coating composition of the invention, it is unnecessary to leave a strip of uncoated material where the nylon adhesive is to be applied.