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US 7,682,674 B2Granted
BADGE- and BPA-free can coating
AssigneeW. R. Grace & Co.-Conn.
InventorsChristian Vogt, Peter Ambrosi, Beate Ries
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AssigneeW. R. Grace & Co.-Conn.
InventorsChristian Vogt, Peter Ambrosi, Beate Ries
Estimating the term…
The present invention relates to a composition, which is useful for producing coatings for metal sheet substrates of metal cans for storing and/or transporting food or beverages or a lid thereof, and which comprises the following components: (a) 30 to 90 wt. % of a polyvinylchloride-(PVC)-polymer, (b) 7 to 25 wt. % of an acrylic resin, (c) 3 to 40 wt. % of a crosslinking agent, which is produced from phenol, para-tert.-butylphenol, xylenol or a mixture thereof, and formaldehyde, (d) 0 to 8 wt. % additive, (e) 0 to 50 wt. % pigment and (f) a solvent-component, where all weight percentages are on the basis of the total dry weight of the coating composition (without solvents) and the composition is substantially free of bisphenol-A-diglycidyl-ether (“BADGE”) and also substantially free of bisphenol-A-resins. The composition provides metal can coatings that have suitable flexibility, scratch resistance, adherence and sterilization resistance when processed in contact with food. The coatings are suitable for three-piece cans as well as deep-drawn metal cans. In particular they are, however, useful for lids that are to be torn open due to their extraordinary flexibility and sterilization resistance.
A coating composition, which is useful for coating a metal substrate, which coating composition comprises:
A method for producing a coated metal substrate which comprises applying a coating composition onto the metal substrate and heating the coated metal substrate, wherein the coating composition comprises:
A coated metal substrate, which has been coated with a coating composition comprising:
Dependencies are inferred from the claim text.