Reference

Suspension polymerization for crosslinked polymer having uniform granular diameters

Suspension polymerization for crosslinked polymer having uniform granular diameters. (Asahi Chemical Industry Co., Ltd., Japan). Jpn. Tokkyo Koho JP 59019123 B4 2 May 1984 Showa, 10 pp. (Japanese). (Japan). CODEN: JAXXAD. CLASS: IC: C08F002-20. ICA: C08F012-08; C08F026-06. APPLICATION: JP 76-61283 28 May 1976. DOCUMENT TYPE: Patent CA Section: 37 (Plastics Manufacture and Processing) Water-insol. phosphates, water-sol. alkylcellulose or hydroxyalkylcellulose, and anionic surfactants are used as suspending agents in suspension polymn. Thus, hydroxyapatite 0.5, methylcellulose (I) [9004-67-5] 0.25, and ammonium lauryl sulfate [2235-54-3] 0.1% were used as suspending agents to prep. divinylbenzene-4-vinylpyridine copolymer [9017-40-7] having granule size distribution as follows: on 200 mesh 9, on 250 mesh 22, on 280 mesh 44, on 300 mesh 17, on 400 mesh 7, and pass 400 mesh 1%, compared with on 120 mesh 14, on 150 mesh 46, on 200 mesh 22, on 280 mesh 11, and on 400 mesh 7%, for using 0.5% I as the suspending agent.

Quantitation of anionic surfactants in aqueous systems via Fourier transform infrared spectroscopy

Quantitation of anionic surfactants in aqueous systems via Fourier transform infrared spectroscopy. Sabo, Marie; Gross, John; Rosenberg, Ira E. (Clairol Inc., Stamford, CT 06922, USA). J. Soc. Cosmet. Chem., 35(4), 207-20 (English) 1984. CODEN: JSCCA5. ISSN: 0037-9832. DOCUMENT TYPE: Journal CA Section: 62 (Essential Oils and Cosmetics) Section cross-reference(s): 46 An innovative sample cell, called a Circle (Cylindrical Internal Reflectance Cell), for use in a Fourier-transform IR spectrometer (FTIR) was tested for its applicability to quant. anionic surfactant detns. in aq. systems. Preliminary studies show excellent results for the detn. of Na lauryl sulfate [151-21-3], ammonium lauryl sulfate [2235-54-3], Na laureth sulfate [9004-82-4], and a-olefin sulfonate raw materials. In addn., a limited no. of shampoos contg. these raw materials were analyzed directly; results were excellent. The distinct advantages of the FTIR procedure over the commonly employed mixed indicator titrn. method include no sample or reagent prepns. no subjective evaluations of end-points, and rapid anal. time. The use of computer-assisted spectral subtraction and the possibility of spectral storage on floppy disks are discussed.