Surface treatment of glass containers

{
  "publication_number": "US4420578A",
  "country": "US",
  "kind": "A",
  "title": "Surface treatment of glass containers",
  "abstract": "Returnable glass bottles, particularly beverage bottles, having a natural glass surface, unmodified by a hot end process coating, having a quick curing thin coating of an amino functional polydimethylsiloxane, which does not visually change the appearance of the bottles applied to the exterior surface to increase lubricity and scratch resistance to said bottles. The coating is removable when the bottles are washed with an aqueous caustic solution. A new one-trip coating can then be applied.",
  "claims": [
    "1. A composition for coating returnable glass bottles comprising about 0.5-50% by weight of an amino functional polydimethylsiloxane, about 5 to 49.9% by weight of an organic solvent, about 0.1 to 10% by weight of a nonionic surfactant, about 0-10% by weight of a quaternary surfactant and about 0-50% by weight of a fatty carboxylic acid having 10 to 22 carbon atoms or a mixture thereof, said composition containing a minimum of 0.1% quaternary surfactant or a minimum of 0.1% fatty carboxylic acid or of both.",
    "2. A composition for coating returnable glass bottles comprising about 0.5-50% by weight of an amino functional polydimethylsiloxane, about 0.3 to 10% by weight of a nonionic surfactant, about 0 to 10% by weight of a quaternary ammonium surfactant, about 0-50% by weight of a fatty carboxylic acid soap, and about 5-94.7% by weight of water, said composition containing a minimum of 0.1% quaternary surfactant or a minimum of 0.1% fatty carboxylic acid or of both.",
    "3. A composition according to claim 1 or 2 in which the amino functional polydimethylsiloxane is formed from (A) a hydroxyl endblocked polydimethylsiloxane and (B) a compound of the formula (CH 3 O) 3 Si(CH 2) 3 NHCH 2 CH 2 NH 2.",
    "4. A composition according to claim 20 including (CH 3 O) 3 SiCH 3."
  ],
  "description_excerpt": "This application is a continuation-in-part of our copending application Ser. No. 205,091 filed Nov. 10, 1980, now abandoned.\n\nThis invention relates to protecting glass articles against scuffing and scratching. More particularly, this invention is concerned with novel processes of coating glass articles, particularly food and beverage bottles, against scuffing and scratching, with an amino functional polydimethylsiloxane coating and novel compositions containing such material which are useful in such processes.\n\nIt is well known that glass articles, such as glass bottles, are handled a great number of times during shipping, filling, use, etc., and that during such handling the bottles come in contact with various mechanical devices and with other bottles. This high degree of contact causes breakage as well as marring, scratching and defacing of the exterior surfaces of the bottles. This defacement or scuffing is aesthetically unattractive.\n\nIn the art as exemplified by Canadian Pat. No. 703,598, it is known that when glass containers are treated at a high temperature with a metal compound, for example tin tetrachloride or certain organic titanium compounds, and after annealing the containers are further treated with an amine, such treated glass containers possess surfaces having a high degree of lubricity and abrasion resistance, so that when brought into contact with one another during the handling and filling operations, the containers slide smoothly against each other and the glass does not become abraded or damaged.",
  "cpc": [
    "C10M 173/025",
    "C03C 17/30",
    "C03C 2218/355",
    "C10M 2207/126",
    "C10M 2215/042",
    "C10M 2219/104",
    "C10M 2229/052",
    "C10N 2040/38",
    "C10N 2050/01",
    "C10N 2050/02"
  ],
  "ipc": [
    "C03C 17/30",
    "C10M 173/02"
  ],
  "assignees": [
    "Diversey Corp Canada"
  ],
  "inventors": [
    "Rodger G. Hagens",
    "Dominic K. Hui"
  ],
  "filing_date": "1981-09-14",
  "publication_date": "1983-12-13",
  "grant_date": "1983-12-13",
  "priority_date": "1980-11-10",
  "application_number": "US-30230381-A",
  "family_id": "26900102",
  "cited_by_count": 76,
  "citations": [
    "US3686357A",
    "US4191817A"
  ]
}