Enclosure member consisting essentially of solid, non-aromatic polymers

• US 4,503,103 A
• Filed: 09/07/1983
• Issued: 03/05/1985
• Est. Priority Date: 09/07/1982
• Status: Expired due to Fees

• Current Assignee: Koninklijke Emballage Industrie Van Leer N.V.
• Original Assignee: Koninklijke Emballage Industrie Van Leer N.V.
• Inventors: Shefford, Roger A.
• Primary Examiner(s): Lusignan, Michael R.
• Application Number:
  US06/529,947
• Time in Patent Office: 545 Days
• Field of Search: 428/35, 428/339, 428/516, 428/526, 427/322, 427/393.5, 215/1 C, 215/12 R
• US Class Current: 428/35.7
• CPC Class Codes: C08G 16/0262 Furfuryl alcohol
• CPC Class Codes: C08J 2323/06 Polyethene
• CPC Class Codes: C08J 2461/00 Characterised by the use of condensation polymers of aldehydes or ketones with polyalcohols C08J2459/00; with polynitriles C08J2477/00; Derivatives of such polymers
• CPC Class Codes: C08J 7/0427 with only one layer of a composition containing a polymer binder with more layers C08J7/042
• CPC Class Codes: C08J 7/048 Forming gas barrier coatings
• CPC Class Codes: C08J 7/14 with acids, their salts or anhydrides
• CPC Class Codes: C09D 161/00 Coating compositions based on condensation polymers of aldehydes or ketones with polyalcohols C09D159/00; with polynitriles C09D177/00; Coating compositions based on derivatives of such polymers
• CPC Class Codes: C09D 161/34 Condensation polymers of aldehydes or ketones with monomers covered by at least two of the groups C09D161/04, C09D161/18 and C09D161/20
• CPC Class Codes: Y10T 428/1352 Polymer or resin containing [i.e., natural or synthetic]
• CPC Class Codes: Y10T 428/269 including synthetic resin or polymer layer or component
• CPC Class Codes: Y10T 428/31913 Monoolefin polymer
• CPC Class Codes: Y10T 428/31928 Ester, halide or nitrile of addition polymer

Abstract

The present invention relates to an enclosure member consisting essentially of solid, non-aromatic polymers that have a linear carbon to carbon backbone structure and have a plurality of free hydrogen atoms attached to the carbon atoms with a permeability to wet and dry solvents and fuels of less than 1/50, of the permeability of untreated enclosure members having a thickness of 1 mm, a portion of the hydrogen atoms of the surfaces of said member having been replaced by sulphonic acid or sulphonate groups and being coated with a cured thin layer of a mixture of a resin made by the reaction of urea and formaldehyde, respectively of melamine and formaldehyde, with furfuryl alcohol, and an oligomer consisting of a polymer of furfuryl alcohol and formaldehyde.

Claims

1. An enclosure member consisting essentially of solid, non-aromatic polymers that have a linear carbon to carbon backbone structure and have a plurality of free hydrogen atoms attached to the carbon atoms with a permeability to wet and dry solvents and fuels of less than 1/50 of the permeability of untreated enclosure members having a thickness of 1 mm, the enclosure having an inner and outer surface having a portion of the hydrogen atoms replaced by sulphonic acid or sulphonate groups and being coated with a cured thin layer having a thickness of at least 2 micrometers of a mixture of 90 to 0 weight % of a resin made by the reaction of urea and formaldehyde in a molar ratio of from 1:

1,1 to 1,7, respectively of melamine and formaldehyde in a molar ratio of from 1;

1,2 to 1;

4,0 with 10 to 70 weight % of furfuryl alcohol added during the reaction and 10-100 weight % of an oligomer consisting of a polymer of furfuryl alcohol and 0 to 100 mole %--calculated on the furfuryl alcohol--of formaldehyde with a degree of polymerisation between 1 and 10.

2. An enclosure member according to claim 1, wherein the said solid, non-aromatic polymer is polyethylene.

5. An enclosure member according to claim 1, wherein said permeability is less than 1/200.

3. A proces for rendering substantially impermeable to the transmission of wet or dry solvents, fuels, vapours and gases an enclosure member consisting of solid non-aromatic polymers which have a linear carbon to carbon backbone structure and have a plurality of free hydrogen atoms attached to the carbon atoms, which process comprises treating the inner and/or outer surfaces of the enclosure member with sulphur trioxide, removing the excess of sulphur trioxide with a stream of dry air followed by washing with an aqueous solution, then applying a layer of a dispersion or solution of a mixture of 90 to 0 weight % of a resin made by the reaction of urea and formaldehyde in a molar ratio of from 1:

1,1 to 1;

1,7 respectively of melamine and formaldehyde in a molar ratio of from 1;

1,2 to 1;

4,0 with 10 to 70 weight % furfuryl alcohol added during the reaction and 10-100 weight % of an oligomer consisting of a polymer of furfuryl alcohol and 0 to 100 mol %--calculated on the furfuryl alcohol--of formaldehyde with a degree of polymerisation between 1 and 10.

4. A process according to claim 3 characterised in that the said enclosure member consists of polyethylene.