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U.S. Department of Health and Human Services

Inventory of Effective Food Contact Substance (FCS) Notifications

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FCN No. 28

 
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Food Contact Substance:  Hydrogenated styrene-butadiene block copolymers modified with maleic anhydride such that the basic polymers are composed of : 18 to 40 percent by weight of units derived from styrene, 58 to 80 percent by weight of units derived from hydrogenated 1,3-butadiene and 0.1 to 2 percent by weight of units derived from maleic anhydride.
 
Notifier:  Asahi Chemical Industry Co.
 
Manufacturer:  Asahi Chemical Industry Co.
 
Intended Use:  As a modifier (blending component) for polymers that are regulated in 21 CFR Part 177 or the subject of an effective notification.
 
Effective Date:  05/03/2000
 
Limitations/Specifications:  As a modifier (blending component) for polymers that are regulated in 21 CFR Part 177 or the subject of an effective notification at levels no greater than 10 weight-percent of the blend. The blend is intended for use as a component of articles that contact food of the types I, II, IVB, VI (<13% alcohol), VIIB and VIII under Conditions of Use A through H, as described in Tables 1 and 2. The subject copolymers shall conform to the following specifications based on the analytical methods in 21 CFR 177.1810(c): a minimum molecular weight of 25,000, complete solubility in toluene, glass transition points of -50°C (-58°F) to -20°C (-4°F) and 85°C (185°F) to 105°C (221°F), maximum extractable fraction of 0.010 mg/cm2 (0.06 mg/in2) of surface with testing at reflux temperature for 2 hr on a 0.071 cm (0.028 in) thick sample in distilled water, and maximum extractable fraction in 50 percent ethanol of 0.008 mg/cm2 (0.05 mg/in2) of surface with testing at 66°C (150°F) for 2 hr on a 0.071 cm (0.028 in) thick sample.
 
Environmental Impact Decisions:  Environmental Decisions Site
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