Enclosure member substantially impermeable to the transmission o

Details Enclosure member substantially impermeable to the transmission o Enclosure member substantially impermeable to the transmission o

1980-12-05

1983-02-01

Ives, P.

Stock material or miscellaneous articles

Hollow or container type article

Cellular material derived from plant or animal source

428339, 428516, 428520, 215 1C, 215 12R, 427299, B65D 2300, B05D 300

Patent

active

043715745

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 .mu.m) of condensation products of formaldehyde and melamine of formaldehyde and urea. Evidently the application relates also to a method of preparing said enclosure members.

REFERENCES:
patent: 2400720 (1946-05-01), Staudinger
patent: 2786780 (1957-03-01), Walles et al.
patent: 2786783 (1957-03-01), Hahn et al.
patent: 2832697 (1958-04-01), Walles
patent: 2832698 (1958-04-01), Walles
patent: 2832699 (1958-04-01), Walles
patent: 2860801 (1958-11-01), Nielsen
patent: 2937066 (1960-05-01), Walles
patent: 2985542 (1961-05-01), Pinsky et al.
patent: 3294577 (1966-12-01), Mayer

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