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§177.1680 聚脲烷树?Polyurethane resins)

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放大字体缩小字体2011-10-12 03:35:44 来源9a href="http://www.law.cornell.edu/cfr/text/21/177/1680" target="_blank" rel="nofollow">GPO浏览次数9span id="hits">3302
核心提示:聚脲烷树脂由本节(a)(1)中所列的一种或若干种异氰酸酯与本节(a)(2)中所列的一种或若干种物质反应而成。用于聚脲烷树脂生产而加入的一些辅料,包括1-[(2-氨基乙基)氨基]-2-丙醇、N,N-二甲基十二烷胺?,4'-亚甲基二苯胺等。与食品接触的本成品树脂的式样,按ASTM方法D968-81“用裸体磨蚀试验器对有机涂层耐磨蚀的标准测试法”测定,用No.5金刚磨料代替渥太华砂,其磨蚀性能为不低于20L/mil薄膜、/div>
发布单位
FDA
FDA
发布文号 56 FR 42933
发布日期 1991-08-30 生效日期 暂无
有效性状?/th> 废止日期 暂无
备注 聚脲烷树脂由本节(a)(1)中所列的一种或若干种异氰酸酯与本节(a)(2)中所列的一种或若干种物质反应而成。用于聚脲烷树脂生产而加入的一些辅料,包括1-[(2-氨基乙基)氨基]-2-丙醇、N,N-二甲基十二烷胺?,4'-亚甲基二苯胺等。与食品接触的本成品树脂的式样,按ASTM方法D968-81“用裸体磨蚀试验器对有机涂层耐磨蚀的标准测试法”测定,用No.5金刚磨料代替渥太华砂,其磨蚀性能为不低于20L/mil薄膜、/td>

177.1680 Polyurethane resins


  The polyurethane resins identified in paragraph (a of this section may be safely used as the food-contact surface of articles intended for use in contact with bulk quantities of dry food of the type identified in 176.170(c of this chapter, table 1, under Type VIII, in accordance with the following prescribed conditions:

  (a For the purpose of this section, polyurethane resins are those produced when one or more of the isocyanates listed in paragraph (a)(1 of this section is made to react with one or more of the substances listed in paragraph (a)(2 of this section:

  ? Isocyanates:

  Bis(isocyanatomethyl benzene (CAS Reg. No. 25854-16-4?

  Bis(isocyanatomethyl cyclohexane (CAS Reg. No. 38661-72-2?

  4,4-Diisocyanato-3,3-dimethylbiphenyl (bi-tolylene diisocyanate?

  Diphenylmethane diisocyanate.

  Hexamethylene diisocyanate.

  3-Isocyanatomethyl - 3,5,5 - tri-methyl-cyclo-hexyl isocyanate.

  4,4-Methylenebis(cyclohexyl isocyanate?

  Toluene diisocyanate.

  ? List of substances:

  Adipic acid.

  1,4-Butanediol.

  1,3-Butylene glycol.

  1,4-Cyclohexane dimethanol (CAS Reg. No. 105-08-8?

  2,2-Dimethyl-1,3-propanediol.

  Ethylene glycol.

  1,6-Hexanediol (CAS Reg. No. 629-11-8?-Hydro--hydroxypoly(oxy-1,4-butanediyl (CAS Reg. No. 25190-06-1?

  -Hydro-omega-hydroxypoly (oxy-tetra-methyl-ene?

  ?alpha;-(Isopropylidenedi-p-phenylene)bis[omega-hydroxypoly (oxy-pro-pylene)(3-4 moles)], average molecular weight 675.

  Maleic anhydride.

  Methyl oxirane polymer with oxirane (CAS Reg. No. 9003-11-6?

  Methyl oxirane polymer with oxirane, ether with 1,2,3-propanetriol (CAS Reg. No. 9082-00-2?

  ?alpha;?alpha;-Neopentanetetrayltetrakis [omega-hydroxypoly (oxypropylene ?-2 moles)], average molecular weight 400.

  Pentaerythritol-linseed oil alcoholysis product.

  Phthalic anhydride.

  Polybutylene glycol.

  Polyethyleneadipate modified with ethanolamine with the molar ratio of the amine to the adipic acid less than 0.1 to 1.

  Poly(oxycarbonylpentamethylene?

  Polyoxypropylene ethers of 4.4-isopropyl-idenediphenol (containing an average of 2-4 moles of propylene oxide?

  Polypropylene glycol.

  ?alpha;?alpha;-1,2,3-Propanetriyltris [omega-hydroxypoly (oxypropylene ?5-18 moles)], average molecular weight 3,000.

  Propylene glycol.

  ?alpha;?alpha;-[Propylidynetris (methylene)] tris [omega-hydroxypoly (oxypropylene (minimum 1.5 moles)], minimum molecular weight 400.

  -[?,1,3,3-Tetramethylbutyl - phenyl]-omega-hydroxypoly(oxyethylene ? moles? average molecular weight 425.

  Trimethylol propane.

  (b Optional adjuvant substances employed in the production of the polyurethane resins or added thereto to impart desired technical or physical properties may include the following substances:

List of substances Limitations
1-[(2-Aminoethyl)amino]2-propanol. As a curing agent.
1-(3-Chloroallyl)-3,5,7-triaza-1-azoniaadamantane chloride As a preservative.
Colorants used in accordance with178.3297of this chapter.
Dibutyltin diacetate As a catalyst.
Dibutyltin dichloride Do.
Dibutyltin dilaurate Do.
N,N-Dimethyldodecylamine Do.
N-Dodecylmorpholine Do.
a,a-[Isopropylidenebis[p-phenyleneoxy(2-hydroxytrimethylene) ]]bis[omega-hydroxypoly-(oxyethylene) (136-170 moles)], average molecular weight 15,000 As a stabilizer.
4,4-Methylenedianiline As a curing agent.
1,1,1-Nitrilotri-2-propanol Do.
2,2-(p-Phenylenedioxy) diethanol Do.
Code of Federal Regulations 321
Polyvinyl isobutyl ether
Polyvinyl methyl ether
Soyaalkyd resin Conforming in composition with175.300of this chapterand containing litharge not to exceed that residual from its use as the reaction catalyst and creosol not to exceed that required as an antioxidant.
Tetrakis [methylene-(2,5-di-tert-butyl-4-hydroxy-hydro-cinna-mate)]methane (CAS Reg. No. 6683-19-8) Stabilizer.
N,N,NN-Tetrakis (2-hydroxypropyl)ethylenediamine As a curing agent.
Triethanolamine Do.
Trimethyleneglycol di (p-aminobenzoate) (CAS Reg. No. 57609-64-0) As a curing agent.


  (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 an abrasion coefficient of not less than 20 liters per mil of film thickness.

   [42 FR 14572, Mar. 15, 1977, as amended at 46 FR 57033, Nov. 20, 1981; 49 FR 10110, Mar. 19, 1984; 50 FR 51847, Dec. 20, 1985; 56 FR 15278, Apr. 16, 1991; 56 FR 42933, Aug. 30, 1991]

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