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Home  > Forum  > Addresses wanted  > Formulation of a solvent based liquid gasket

Sunday, 22 September 2019

Formulation of a solvent based liquid gasket

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Thursday 23 July 1998 1:00:00 am

I wish to formulate a solvent based liquid gasket for food and beverage metal cans.
Do you have any idea or do you know who supplies this to the manufacturers of metal cans?

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Wednesday 19 August 1998 1:00:00 am

Sealants for food and beverage metal cans are specialist products which must without fail meet a number of requirements, and certain raw material components are preferably used in formulating them. The gaskets must not only seal and hold together the seams and bonds of the cans securely and permanently, but must also have excellent adherence to the sheet metal surfaces and preclude any corrosion. Under no circumstances must they give rise to any kind of health risk. Even after prolonged storage, there must be no spoilage of the can contents as to taste or in other respects as a result of interaction with the gasket.
For this reason, polymer or resin components found in can lacquers are also frequently used in gaskets. These are epoxy and phenolic resins of the resol type, and also acrylic and urethane polymers, in the form of addition compounds, hybrids or mixtures. Latterly, dispersion-based gaskets have gained considerable ground in a short time. If gaskets containing solvents or other volatile components are used, it must be ensured that such constituents are expelled from the gasket during can manufacture without pores and without residue. When selecting gaskets or opting for certain formulations, account must be taken of both the technological aspects of can manufacture and also the nature of the can contents.
Manufacturers of these specialist products have relevant experience and should therefore be regarded as a resource for information and tips. Some addresses follow: (1) Henkel KG, Dusseldorf (D); (2) DS-Chemie GmbH, Bremen (D); (3) Sonderhoff GmbH & Co. KG, Cologne (D); (4) Rhenania Chemische Gesellschaft mbH, Grevenbroich (D). The following publication is also a major source of information relating to the problems discussed here: "Role of primers in the 'adhesive-bonded cans'. A review", Kobayashi, S. & Miyazawa, T.: Progr. Org. Coat. 1993, 23(1), 23-47.

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