Reference

Development of candidate chemical simulant list: the evaluation of candidate chemical simulants which may be used in chemically hazardous operations

Development of candidate chemical simulant list: the evaluation of candidate chemical simulants which may be used in chemically hazardous operations. (Little, Arthur D., Inc.In this study， 112-55-0 and 1653-30-1 are also used., Cambridge, MA, USA). Report, ADL-87638-01, AFAMRL-TR-82-87; Order No. AD-B070947, 144 pp. Avail. NTIS From: Gov. Rep. Announce. Index (U. S.) 1984, 84(5), 302 (English) 1982. DOCUMENT TYPE: Report CA Section: 59 (Air Pollution and Industrial Hygiene) The objectives of this task were threefold: (1) to provide addnl. data for the proposed candidate simulants dipentene [138-86-3], methyl benzoate [93-58-3], and benzyl alc. [100-51-6] by means of in-depth literature searches encompassing both computerized data bases and a manual search of the older literature; (2) to fully evaluate 12 possible candidate simulants under more flexible simulant criteria; and (3) to develop a list of candidate simulants in the low and non-volatile categories. Computerized literature searches were conducted for the 12 possible candidate simulants under more flexible intake simulant criteria as well as for dimethylmethylphosphonate [756-79-6], a compd. selected for evaluation by the USAF. The 12 possible candidates included cyclohexanone [108-94-1], n-dodecanethiol [112-55-0], methyl salicylate [119-36-8], dihexyl ether [112-58-3], dypnone [495-45-4], n-aminopropyl morpholine [123-00-2], n-(2-hydroxyethyl)morpholine [622-40-2], butyl salicylate [2052-14-4], di(2-Et hexyl)ether, 2-undecanol [1653-30-1], 2-hydroxyethyl-n-octyl sulfide [3547-33-9], and n,n-diethyl-m-toluamide [134-62-3]. Full assesment of the potential health hazards assocd. with exposure to n-dodecanethiol, Me salicylate, Bu salicylate, and n,n-diethyl-m-toluamide was completed. All of these compds. meet the majority of USAF criteria for candidate simulants. Cyclohexanone was disqualified for reasons of toxicity, while the available toxicol. data for the 7 remaining candidates were considered inadequate for full assessment of hazard. .

Treatment of melt-spun synthetic fibers

Treatment of melt-spun synthetic fibers. (M and T Chemicals, Inc., USA). Neth. Appl. NL 7512986 11 May 1976, 40 pp. (Dutch). (Netherlands). CODEN: NAXXAN. CLASS: IC: D06M013-32. PRIORITY: US 74-521843 7 Nov 1974. DOCUMENT TYPE: Patent CA Section: 39 (Textiles) Melt-spun polyester, polyamide, or polyolefin fibers are impregnated with 0.1-25% of an additive by cold drawing the fibers at a ratio between 1.5 and the breaking elongation to give at least localized diam. redn. and then immersing them in a liq. or vapor medium which contains the additive as a soln., dispersion, or emulsion of concn. 0.1-99%.Several reagents with their cas registry numbers 13598-36-2 and 1449-91-8 are used here. The max. particle size of the dispersed or emulsified additive is .ltoreq.2.mu., and the medium is a nonsolvent for the undrawn fiber. The contact angle between the liq. medium, fiber-forming polymer, and air or any other vapor phase used is <90.degree., and the temp. of the medium is below the glass temp. of the fiber. Thus, an undrawn, semi-matt, 148 denier 34 filament poly(ethylene terephthalate) yarn was cold drawn at a ratio of 3.5 and passed through a methanolic soln. contg. 200 g/l. 1:1 reaction product of cyclic phosphite I [824-11-3] and di-Me methylphosphonate [756-79-6] at room temp. with contact time 0.5 s. A sample of the treated yarn was extd. with perchloroethylene, washed, and dried, giving a product contg. 1.59% wt. P. A degreased sample of yarn had limiting O index 27.0 and 27.3 before and after 50 washings. .