GrokFood Home
Loading

177.1480 Nitrile rubber modified acrylonitrile-methyl acrylate copolymers.

Home > Regulations > Indirect food additives: Polymers > 177.1480 Nitrile rubber modified acrylonitrile-methyl acrylate copolymers.



[Code of Federal Regulations]
[Title 21, Volume 3]
[Revised as of April 1, 2006]
From the U.S. Government Printing Office via GPO Access
[CITE: 21CFR177.1480]

[Page 275-276]
 
                        TITLE 21--FOOD AND DRUGS
 
CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN 
                          SERVICES (CONTINUED)
 
PART 177_INDIRECT FOOD ADDITIVES: POLYMERS--Table of Contents
 
Subpart B_Substances for Use as Basic Components of Single and Repeated 
                        Use Food Contact Surfaces
 
Sec.  177.1480  Nitrile rubber modified acrylonitrile-methyl acrylate 
copolymers.

    Nitrile rubber modified acrylonitrile-methyl acrylate copolymers 
identified in this section may be safely used as components of articles 
intended for food-contact use under conditions of use D, E, F, or G 
described in table 2 of Sec.  176.170(c) of this chapter, subject to the 
provisions of this section.

[[Page 276]]

    (a) For the purpose of this section, nitrile rubber modified 
acrylonitrile-methyl acrylate copolymers consist of basic copolymers 
produced by the graft copolymerization of 73-77 parts by weight of 
acrylonitrile and 23-27 parts by weight of methyl acrylate in the 
presence of 8-10 parts by weight of butadiene-acrylonitrile copolymers 
containing approximately 70 percent by weight of polymer units derived 
from butadiene.
    (b) The nitrile rubber modified acrylonitrile-methyl acrylate basic 
copolymers meet the following specifications and extractives 
limitations:
    (1) Specifications. (i) Nitrogen content is in the range 16.5-19 
percent as determined by Kjeldahl analysis.
    (ii) Intrinsic viscosity in acetonitrile at 25 [deg]C is not less 
than 0.29 deciliter per gram as determined by ASTM method D1243-79, 
``Standard Test Method for Dilute Solution Viscosity of Vinyl Chloride 
Polymers,'' 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.
    (iii) Residual acrylonitrile monomer content is not more than 11 
parts per million as determined by gas chromatography.
    (iv) Acetonitrile-soluble fraction after refluxing the base polymer 
in acetonitrile for 1 hour is not greater than 95 percent by weight of 
the basic copolymers.
    (2) Extractives limitations. The following extractive limitations 
are determined by an infrared spectrophotometric method titled, 
``Infrared Spectrophotometric Determination of Polymer Extracted from 
Borex [reg] 210 Resin Pellets,'' which is incorporated by 
reference. Copies are available from the Center for Food Safety and 
Applied Nutrition (HFS-200), Food and Drug Administration, 5100 Paint 
Branch Pkwy., College Park, MD 20740, or available for inspection 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.Copies are applicable to the basic 
copolymers in the form of particles of a size that will pass through a 
U.S. standard sieve No. 6 and that will be held on a U.S. standard sieve 
No. 10:
    (i) Extracted copolymer not to exceed 2.0 parts per million in 
aqueous extract obtained when a 100-gram sample of the basic copolymers 
is extracted with 250 milliliters of demineralized (deionized) water at 
reflux temperature for 2 hours.
    (ii) Extracted copolymer not to exceed 0.5 part per million in n-
heptane extract obtained when a 100-gram sample of the basic copolymers 
is extracted with 250 milliliters of reagent grade n-heptane at reflux 
temperature for 2 hours.
    (c) Acrylonitrile copolymers identified in this section shall comply 
with the provisions of Sec.  180.22 of this chapter.
    (d) Acrylonitrile copolymers identified in this section are not 
authorized to be used to fabricate beverage containers.

[42 FR 14572, Mar. 15, 1977, as amended at 42 FR 48544, Sept. 23, 1977; 
47 FR 11843, Mar. 19, 1982; 47 FR 16775, Apr. 20, 1982; 49 FR 10109, 
Mar. 19, 1984; 54 FR 24898, June 12, 1989; 61 FR 14481, Apr. 2, 1996]





Additives that reference this regulation:


Source: U.S. Code of Federal Regulations - CFR Title 21, Part 177, Section 1480


Home | About | Search