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Passivation, pH protective or lubricity coating for pharmaceutical package, coating process and apparatus

  • US 10,577,154 B2
  • Filed: 12/19/2018
  • Issued: 03/03/2020
  • Est. Priority Date: 11/11/2011
  • Status: Active Grant
First Claim
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1. A vessel comprising:

  • a thermoplastic wall having an interior surface enclosing a lumen;

    a fluid contained in the lumen having a pH greater than 5 disposed in the lumen;

    a barrier coating or layer of SiOx, in which x is between 1.5 and 2.9, the barrier coating or layer applied by PECVD, positioned between the interior surface of the thermoplastic wall and the fluid, and supported by the thermoplastic wall, the barrier coating or layer having the characteristic of being subject to being measurably diminished in barrier improvement factor in less than six months as a result of attack by the fluid; and

    a passivation layer or pH protective coating of SiOxCy, in which x is between 0.5 and 2.4 and y is between 0.6 and 3, the passivation layer or pH protective coating applied by PECVD, positioned between the barrier coating or layer and the fluid, and supported by the thermoplastic wall, the passivation layer or pH protective coating being effective to keep the barrier coating or layer at least substantially undissolved as a result of attack by the fluid for a period of at least six months.

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