Water-soluble film

{
  "publication_number": "US6166117A",
  "country": "US",
  "kind": "A",
  "title": "Water-soluble film",
  "abstract": "A water-soluble film, comprising 100 parts by weight of (A) a sulfonic acid group modified polyvinyl alcohol and 0.05-20 parts by weight of (B) gallic acid, salts thereof or a C 1-5 alkyl ester thereof.",
  "claims": [
    "1. A water-soluble film, comprising: 100 parts by weight of (A) a sulfonic acid group modified polyvinyl alcohol and 0.50-20 parts by weight of (B) gallic acid, its salts or a C 1-5 alkyl ester thereof.",
    "2. The water-soluble film of claim 1, wherein said gallic acid ester is the methyl, ethyl, propyl or isoamyl ester.",
    "3. The water-soluble film of claim 1, wherein the amount of gallic acid or a C 1-5 -alkyl ester thereof ranges form 0.2-10 parts by weight.",
    "4. The water-soluble film of claim 1, wherein the content of the sulfonic acid group unit in the polyvinyl alcohol ranges form 0.1-20 mol. %.",
    "5. The water-soluble film of claim 4, wherein the content of the sulfonic acid group unit ranges from 0.5-10 mol. %.",
    "6. The water-soluble film of claim 1, wherein the polyvinyl alcohol is prepared from a sulfonic acid group containing monomer selected from the group consisting of 2-acrylamido-2-methylpropanesulfonic acid, 2-methacrylamido-2-methylpropanesulfonic acid, salts thereof and olefin sulfonic acids.",
    "7. The water-soluble film of claim 1, wherein the degree of hydrolysis of the polyvinyl alcohol ranges form 50-100 mol. %.",
    "8. The water-soluble film of claim 7, wherein said degree of hydrolysis ranges from 80-100 mol. %.",
    "9. The water-soluble film of claim 1, wherein the sulfonic acid group modified polyvinyl alcohol is prepared by the copolymerization of a vinyl ester a sulfonic acid group containing a monomer.",
    "10. The water-soluble film of claim 9, wherein the polyvinyl alcohol is prepared by the reaction of a sulfonic acid containing compound with polyvinyl alcohol.",
    "11. The water-soluble film of claim 1, wherein the polyvinyl alcohol is prepared by the reaction of a sulfonic acid containing compound with polyvinyl alcohol.",
    "12. A composition, comprising: 100 parts by weight of (A) a sulfonic acid group modified polyvinyl alcohol and 0.05-20 parts by weight of (B) gallic acid, salts thereof or a C 1-5 alkyl ester thereof."
  ],
  "cpc": [
    "C08K 5/13",
    "B65D 65/46",
    "C08F 8/00",
    "C08J 2329/04",
    "C08J 5/18",
    "C08K 5/09",
    "C08K 5/1345",
    "C11D 17/0047",
    "C11D 17/0056",
    "C11D 17/044",
    "C11D 3/3955"
  ],
  "assignees": [
    "KURARAY CO"
  ],
  "filing_date": "1998-06-10",
  "publication_date": "2000-12-26",
  "grant_date": "2000-12-26",
  "priority_date": "1997-06-11",
  "application_number": "US-9450698-A",
  "family_id": "26481921",
  "citations": [
    "EP0259037A2",
    "JPH07118407A",
    "JPH09316270A",
    "JPS5324351A",
    "US4156047A",
    "US4221710A",
    "US4753947A",
    "US4833116A",
    "US4910185A",
    "US4954477A",
    "US5677365A"
  ]
}