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177.2000 Vinylidene chloride/methyl acrylate/methyl methacrylate polymers.

Home > Regulations > Indirect food additives: Polymers > 177.2000 Vinylidene chloride/methyl acrylate/methyl methacrylate polymers.



[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: 21CFR177.2000]

[Page 331-332]
 
                        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.  177.2000  Vinylidene chloride/methyl acrylate/methyl methacrylate 
polymers.

    The vinylidene chloride/methyl acrylate/methyl methacrylate polymers 
(CAS Reg. No. 34364-83-5) identified in paragraph (a) of this section 
may be safely used as articles or as a component of articles intended 
for use in contact with food subject to the provisions of this section.
    (a) Identity. For the purpose of this section, vinylidene chloride/
methyl acrylate/methyl methacrylate polymers consist of basic polymers 
produced by the copolymerization of vinylidene chloride/methyl acrylate/
methyl methacrylate such that the basic polymers or the finished food-
contact articles meet the specifications prescribed in paragraph (d) of 
this section.
    (b) Optional adjuvant substances. The basic vinylidene chloride/
methyl acrylate/methyl methacrylate polymers identified in paragraph (a) 
of this section may contain optional adjuvant substances required in the 
production of such basic polymers. These optional adjuvant substances 
may include substances permitted for such use by regulations in parts 
170 through 179 of this chapter, substances generally recognized as safe 
in food, and substances used in accordance with a prior sanction of 
approval.
    (c) Conditions of use. The polymers may be safely used as articles 
or as components of articles intended for use in producing, 
manufacturing, processing, preparing, treating, packaging, transporting, 
or holding food, including processing of packaged food at temperatures 
up to 121 [deg]C (250 [deg]F).
    (d) Specifications and limitations. The vinylidene chloride/methyl 
acrylate/methyl methacrylate basic polymers and/or finished food-contact 
articles meet the following specifications and limitations:
    (1)(i) The basic vinylidene chloride/methyl acrylate/methyl 
methacrylate polymers contain not more than 2 weight percent of polymer 
units derived from methyl acrylate monomer and not more than 6 weight 
percent of polymer units derived from methyl methacrylate monomer.
    (ii) The basic polymers are limited to a thickness of not more than 
0.005 centimeter (0.002 inches).
    (2) The weight average molecular weight of the basic polymer is not 
less than 100,000 when determined by gel permeation chromatography using 
tetrahydrofuran as the solvent. The gel permeation chromatography is 
calibrated with polystyrene standards. The basic gel permeation 
chromatographic method is described in ANSI/ASTM D3536-76, which is 
incorporated by reference. Copies are available from the American 
Society for Testing Materials, 100 Barr Harbor Dr., West Conshohocken, 
Philadelphia, PA 19428-

[[Page 332]]

2959, 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.
    (3) The basic polymer or food-contact article described in paragraph 
(a) of this section, when extracted with the solvent or solvents 
characterizing the type of food and under the conditions of time and 
temperature characterizing the conditions of its intended use as 
determined from tables 1 and 2 of Sec.  176.170(c) of this chapter, 
yields net chloroform-soluble extractives in each extracting solvent not 
to exceed .08 milligram per square centimeter (0.5 milligram per square 
inch) of food-contact surface when tested by the methods described in 
Sec.  176.170(d). If the finished food-contact article is itself the 
subject of a regulation in parts 174 through 178 and Sec.  179.45 of 
this chapter, it shall also comply with any specifications and 
limitations prescribed for it by the regulation.

[49 FR 29578, July 23, 1984]





Additives that reference this regulation:


Source: U.S. Code of Federal Regulations - CFR Title 21, Part 177, Section 2000


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