B - Operations – Transporting – 05 – B
Patent
B - Operations, Transporting
05
B
117/90
B05B 3/04 (2006.01) B32B 27/08 (2006.01) B65D 1/02 (2006.01) B65D 25/34 (2006.01) C08J 7/04 (2006.01) C08J 7/12 (2006.01)
Patent
CA 1157322
ABSTRACT The present application relates to enclosure members consisting essentially of solid, non-aromatic polymers that have a linear carbon to carbon backbone structure and having a plurality of free hydrogen atoms attached to the carbon atoms with a permeability to wet solvents and fuels of less than 1/50, optionally less than 1/200 of the permeability of untreated enclosure members having a thickness of 1 mm. Said low permeability is due to the presence of a coating on at least the inner surface of said enclosure members, having a portion of the hydrogen atoms replaced by sulphonic acid or sulphonate groups, consisting of a cured thin layer (of at least 2/um) of condensation products of formaldehyde and melamine of formaldehyde and urea. Evidently the application relates also to a method of preparing said enclosure members.
370746
Gowling Lafleur Henderson Llp
Koninklijke Emballage Industrie Van Leer B.,v.
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