GrokFood Home

177.1960 Vinyl chloride-hexene-1 copolymers.

Home > Regulations > Indirect food additives: Polymers > 177.1960 Vinyl chloride-hexene-1 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: 21CFR177.1960]

[Page 325-326]
                        TITLE 21--FOOD AND DRUGS
                          SERVICES (CONTINUED)
Subpart B_Substances for Use as Basic Components of Single and Repeated 
                        Use Food Contact Surfaces
Sec.  177.1960  Vinyl chloride-hexene-1 copolymers.

    The vinyl chloride-hexene-1 copolymers identified in paragraph (a) 
of this section or as components of articles intended for use in contact 
with food, 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 
    (a) Identity. For the purposes of this section vinyl chloride-
hexene-1 copolymers consist of basic copolymers produced by the 
copolymerization of vinyl chloride and hexene-1 such that the finished 
copolymers contain not more than 3 mole-percent of polymer units derived 
from hexene-1 and meet the specifications and extractives limitations 
prescribed in paragraph (b) of this section. The copolymers may 
optionally contain hydroxypropyl methyl cellulose and trichloroethylene 
used as a suspending agent and chain transfer agent, respectively, in 
their production.
    (b) Specifications and limitations. The vinyl chloride-hexene-1 
basic copolymers meet the following specifications and extractives 
    (1) Specifications. (i) Total chlorine content is 53 to 56 percent 
as determined by any suitable analytical procedure of generally accepted 
    (ii) Inherent viscosity in cyclohexanone at 30 [deg]C is not less 
than 0.59 deciliters 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 
    (2) Extractives limitations. The following extractives limitations 
are determined by the methods prescribed in Sec.  177.1970(d).
    (i) Total extractives do not exceed 0.01 weight percent when 
extracted with water at 150 [deg]F for 2 hours.
    (ii) Total extractives do not exceed 0.30 weight percent when 
extracted with n-heptane at 150 [deg]F for 2 hours.
    (c) Other specifications and limitations. The vinyl chloride-hexene-
1 copolymers identified in and complying with this section, when used as 
components of the food-contact surface of any article that is subject to 
a regulation in parts 174, 175, 176, 177, 178 and Sec.  179.45 of this 
chapter, shall comply with any

[[Page 326]]

specifications and limitations prescribed by such regulation for the 
article in the finished form in which it is to contact food.

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

Additives that reference this regulation:

Source: U.S. Code of Federal Regulations - CFR Title 21, Part 177, Section 1960

Home | About | Search