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177.1030 Acrylonitrile/butadiene/styrene/methyl methacrylate copolymer.

Home > Regulations > Indirect food additives: Polymers > 177.1030 Acrylonitrile/butadiene/styrene/methyl methacrylate copolymer.



[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: 21CFR177.1030]

[Page 242-243]
 
                        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.  177.1030  Acrylonitrile/butadiene/styrene/methyl methacrylate 
copolymer.

    Acrylonitrile/butadiene/styrene/methyl methacrylate copolymer 
identified in this section may be safely used as an article or component 
of articles intended for use with food identified in table 1 of Sec.  
176.170(c) of this chapter as Type I, II, III, IVA, IVB, V, VIB, (except 
bottles intended to hold carbonated beverages), VIIA, VIIB, VIII and IX, 
under conditions of use C, D, E, F, and G described in table 2 of Sec.  
176.170(c) of this chapter with a high temperature limitation of 190 
[deg]F.
    (a) Identity. For the purpose of this section, acrylonitrile/
butadiene/styrene/methyl methacrylate copolymer consists of: (1) 73 to 
79 parts by weight of a matrix polymer containing 64 to 69 parts by 
weight of acrylonitrile, 25 to 30 parts by weight of styrene and 4 to 6 
parts by weight of methyl methacrylate; and (2) 21 to 27 parts by weight 
of a grafted rubber consisting of (i) 16 to 20 parts of butadiene/
styrene/elastomer containing 72 to 77 parts by weight of butadiene and 
23 to 28 parts by weight of styrene and (ii) 5 to 10 parts by weight of 
a graft polymer having the same composition range as the matrix polymer.
    (b) Adjuvants. The copolymer identified in paragraph (a) of this 
section may contain adjuvant substances required in its production. Such 
adjuvants may include substances generally recognized as safe in food, 
substances used in accordance with prior sanction, substances permitted 
under applicable regulations in this part, and the following:

------------------------------------------------------------------------
                Substances                           Limitations
------------------------------------------------------------------------
2-Mercaptoethanol.........................  The finished copolymer shall
                                             contain not more than 800
                                             ppm 2-mercaptoethanol
                                             acrylonitrile adduct as
                                             determined by a method
                                             titled ``Analysis of
                                             Cycopac Resin for Residual
                                             [beta]-(2-Hydroxyethylmerca
                                             pto) propionitrile,'' which
                                             is incorporated by
                                             reference. Copies are avail
                                             able from the Bureau of
                                             Foods (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.
------------------------------------------------------------------------

    (c) Specifications. (1) Nitrogen content of the copolymer is in the 
range of 13.0 to 16.0 percent as determined by Micro-Kjeldahl analysis.
    (2) Residual acrylonitrile monomer content of the finished copolymer 
articles is not more than 11 parts per million as determined by a gas 
chromatographic method titled ``Determination of Residual Acrylonitrile 
and Styrene Monomers-Gas Chromatographic Internal Standard Method,'' 
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.
    (d) Extractive limitations. (1) Total nonvolatile extractives not to 
exceed 0.0005 milligram per square inch surface area of the food-contact 
article when exposed to distilled water, 3 percent acetic acid, 50 
percent ethanol, and n-heptane for 10 days at 120 [deg]F.
    (2) The finished food-contact article shall yield not more than 
0.0025 milligram per square inch of acrylonitrile monomer when exposed 
to distilled water, 3 percent acetic acid and n-heptane at 190 [deg]F 
for 2 hours, cooled to

[[Page 243]]

120 [deg]F (80 to 90 minutes) and maintained at 120 [deg]F for 10 days 
when analyzed by a polarographic method titled ``Extracted Acrylonitrile 
by Differential Pulse Polarography,'' 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.
    (e) Acrylonitrile copolymers identified in this section shall comply 
with the provisions of Sec.  180.22 of this chapter.
    (f) 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 48543, Sept. 23, 1977; 
47 FR 11841, Mar. 19, 1982; 54 FR 24898, June 12, 1989]





Additives that reference this regulation:


Source: U.S. Code of Federal Regulations - CFR Title 21, Part 177, Section 1030


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