[Code of Federal Regulations]
[Title 21, Volume 3]
[Revised as of April 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 21CFR175.260]

[Page 167]
 
                        TITLE 21--FOOD AND DRUGS
 
CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN 
                          SERVICES (CONTINUED)
 
PART 175_INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF 
COATINGS--Table of Contents
 
         Subpart C_Substances for Use as Components of Coatings
 
Sec. 175.260  Partial phosphoric acid esters of polyester resins.

    Partial phosphoric acid esters of polyester resins identified in 
this section and applied on aluminum may be safely used as food-contact 
coatings, in accordance with the following prescribed conditions:
    (a) For the purpose of this section, partial phosphoric acid esters 
of polyester resins are prepared by the reaction of trimellitic 
anhydride with 2,2-dimethyl-1,3-propanediol followed by reaction of the 
resin thus produced with phosphoric acid anhydride to produce a resin 
having an acid number of 81 to 98 and a phosphorus content of 4.05 to 
4.65 percent by weight.
    (b) The coating is chemically bonded to the metal and cured at 
temperatures exceeding 450 [deg]F.
    (c) The finished food-contact coating, 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. 175.300(d), 
yields total extractives in each extracting solvent not to exceed 0.3 
milligrams per square inch of food-contact surface, as determined by the 
methods described in Sec. 175.300(e), and the coating yields 2,2-
dimethyl-1,3-propanediol in each extracting solvent not to exceed 0.3 
micrograms per square inch of food-contact surface. In testing the 
finished food-contact articles, a separate test sample is to be used for 
each required extracting solvent.