Detail of "35958-30-6"

Reference

Polymerization of vinyl monomers with an improved kinetic rate profile

Polymerization of vinyl monomers with an improved kinetic rate profile. Gardner, Keith L.; Jones, Richard A. (Goodrich, B. F., Co., USA). U.S. US 4482684 A 13 Nov 1984, 5 pp. Cont.-in-part of U.S. Ser. No. 258,978, abandoned. (English). (United States of America). CODEN: USXXAM. CLASS: IC: C08F002-38; C08F002-20. NCL: 526084000. APPLICATION: US 82-426048 28 Sep 1982. PRIORITY: US 81-258978 30 Apr 1981. DOCUMENT TYPE: Patent CA Section: 35 (Chemistry of Synthetic High Polymers) 2,2'-Methylenebis(4,6-di-tert-butylphenol) (I) [14362-12-0] and 2,2'-ethylidenebis(4,6-di-tert-butylphenol) [35958-30-6] were effective inhibitors in the aq. suspension polymn. of copolymn. of vinyl monomers in presence of an initiator and a dispersant at 0-100°, when added at the rate of 0.001-0.01 part based on wt. of monomer. Their use permits a wide range of control throughout the increased reaction rate region and substantially reduces the tailpeak encountered during aq. suspension polymn. of olefins. Thus, a compn. consisting of water 192, vinyl chloride 100, 88% hydrolyzed poly(vinyl acetate) 0.075, lauroyl peroxide 0.5, and I 0.005 part was heated to 50° and polymn. was allowed to continue until the yield of PVC [9002-86-2] was approx. 85% while water was continually added to compensate for the decrease in vol. due to polymer formation. The rate peak was 536.7 min, the water addn. rate 2.015 g/min, and the PVC prodn. rate during the rate peak 4.112 g/min compared with 553.8, 1.336, and 2.72, resp., for polymn. in the absence of I. The rate peak with initiator was diminished by 33.8% over that in the control run, in terms of PVC prodn.

Indirect food additives: adjuvants, production aids, and sanitizers

Indirect food additives: adjuvants, production aids, and sanitizers. (United States Food and Drug Administration, Rockville, MD 20857, USA). Fed. Regist., 51(193), 35511-12, (English) 6 Oct 1986. CODEN: FEREAC. ISSN: 0097-6326. DOCUMENT TYPE: Journal CA Section: 17 (Food and Feed Chemistry) Section cross-reference(s): 38 2,2'-Ethylidenebis(4,6-tert-butylphenol) [35958-30-6] may be used as an antioxidant-stabilizer in polystyrene [9003-53-6] and rubber-modified polystyrene intended for use in contact with food, under the Federal Food, Drug, and Cosmetic Act. 35958-30-6 and 9003-53-6 which are cas registry numbers are also used here. The max. permissible concns. of the phenol are 0.1% by wt. in polystyrene and 0.2% by wt. in rubber-modified polystyrene. .