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§177.1650 多硫化物聚合物/聚环氧树脂(Polysulfide polymer-polyepoxy resins)

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放大字体  缩小字体 2011-10-11 18:58:59  来源:GPO  浏览次数:3334
核心提示:多硫化物聚合物/聚环氧树脂是由液态的多硫化物聚合物与多功能环氧树脂的反应产物,在三(二甲基氨基甲基)苯酚帮助下固化,并可加入某些物质,使树脂获得所希望的技术特性。这些物质包括食品及包装中一般公认为安全的物质。在本章中和已公布的法规或规定文件中允许使用的物质等。本树脂可用于接触干燥食品的表面。由本树脂制成的与食品接触的成品样品,其磨蚀性能每微米薄膜厚度不得低于0.79L。
发布单位
FDA
FDA
发布文号 49 FR 10110
发布日期 1984-03-19 生效日期 暂无
有效性状态 废止日期 暂无
备注 多硫化物聚合物/聚环氧树脂是由液态的多硫化物聚合物与多功能环氧树脂的反应产物,在三(二甲基氨基甲基)苯酚帮助下固化,并可加入某些物质,使树脂获得所希望的技术特性。这些物质包括食品及包装中一般公认为安全的物质。在本章中和已公布的法规或规定文件中允许使用的物质等。本树脂可用于接触干燥食品的表面。由本树脂制成的与食品接触的成品样品,其磨蚀性能每微米薄膜厚度不得低于0.79L。
      §177.1650 Polysulfide polymer-polyepoxy resins.


    Polysulfide polymer-polyepoxy res- ins may be safely used as the food-contact surface of articles intended for packaging, transporting, holding, or otherwise contacting dry food, in accordance with the following prescribed conditions:
  (a) Polysulfide polymer-polyepoxy resins are the reaction products of liquid polysulfide polymers and polyfunctional epoxide resins, cured with the aid of tri(dimethylaminomethyl) phenol, to which have been added certain optional substances to impart desired technological properties to the resins. Subject to any limitations prescribed in this section, the optional substances may include:
  (1) Substances generally recognized as safe in food and food packaging.
  (2) Substances the use of which is permitted under applicable regulations in this part, prior sanctions, or approvals.
  (3) Substances named in this subparagraph and further identified as required:
 
List of substances Limitations
Bis(2-chloroethyl) formal  
Bis(dichloropropyl) formal  Cross-linking agent.
Butyl alcohol  Solvent.
Carbon black (channel process)  
Chlorinated paraffins  Cross-linking agent.
Epoxidized linseed oil  
Epoxidized soybean oil  
Epoxy resins (as listed in § 175.300(b)(3)(viii) (a) of this chapter).  
 Ethylene glycol monobutyl ether  Solvent.
 Magnesium chloride  
 Methyl isobutyl ketone  Solvent.
 Naphthalene sulfonic acid-formaldehyde condensate, sodium salt  
 Sodium dibutyl naphthalene sulfonate  Wetting agent.
 
Code of Federal Regulations 318
 
Sodium hydrosulfide   
Sodium polysulfide   
 β,β′,γ,γ′-Tetrachloro normal propyl ether  
 Titanium dioxide  Cross-linking agent.
 Toluene  
 Trichloroethane  Solvent.
 1,2,3-Trichloropropane Do. 
 Urea-formaldehyde resins  
 Xylene Solvent. 


  (b) The resins are used as the food-contact surface for dry food.

  (c) An appropriate sample of the finished resin in the form in which it contacts food, when subjected to ASTM method D968-81, “Standard Test Methods for Abrasion Resistance of Organic Coatings by the Falling Abrasive Tester,” which is incorporated by reference (Copies may be obtained from the American Society for Testing Materials, 100 Barr Harbor Dr., West Conshohocken, Philadelphia, PA 19428-2959, or may be examined at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202-741-6030, or go to: http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html. ), using No. 50 Emery abrasive in lieu of Ottawa sand, shall exhibit and abrasion coefficient of not less than 20 liters per mil of film thickness.

    [42 FR 14572, Mar. 15, 1977, as amended at 49 FR 10110, Mar. 19, 1984]

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 标签: 成品 包装 
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