Reference

Detecting curing agents in unsaturated polyesters

Detecting curing agents in unsaturated polyesters. Grobbauer, Peter (Vianova Kunstharz A.-G., Austria). Austrian AT 377271 B 25 Feb 1985, 5 pp. (German). (Austria). CODEN: AUXXAK. CLASS: IC: C08J003-20; C08L067-06. APPLICATION: AT 83-1387 19 Apr 1983. DOCUMENT TYPE: Patent CA Section: 37 (Plastics Manufacture and Processing) C.I. Solvent Blue 35 (I) [17354-14-2] and C.I. Solvent Black 3 [4197-25-5] indicate by color changes the time elapsed (i.e. remaining pot life) after addn. of curing catalysts to unsatd. polyesters. Thus, an unsatd. polyester contg. 40% styrene and 7.5 ppm I was violet-blue. When Co octoate and MEK peroxide were added the compn. (giving gel time 30 min at 20°), the color changed to green-blue, green, green-yellow, and the original resin color after 0.5, 19, 21.5, and 24 min, resp.

Rotation planar chromatography coupled on-line with atmospheric pressure chemical ionization mass spectrometry

Rotation planar chromatography coupled on-line with atmospheric pressure chemical ionization mass spectrometry. Van Berkel, Gary J.; Llave, Jonathan J.; De Apadoca, Marilyn F.Chemicals with cas numbers 6368-72-5 and 17354-14-2 also play role.; Ford, Michael J. (Organic and Biological Mass Spectrometry Group, Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6131, USA). Analytical Chemistry, 76(2), 479-482 (English) 2004 American Chemical Society. CODEN: ANCHAM. ISSN: 0003-2700. DOCUMENT TYPE: Journal CA Section: 80 (Organic Analytical Chemistry) The coupling of a rotation planar preparative thin-layer chromatog. system online with mass spectrometry is demonstrated using a simple plumbing scheme and a self-aspirating heated nebulizer probe of a corona discharge atm. pressure chem. ionization source. The self-aspiration of the heated nebulizer delivers ~20 mL/min of the 3.0 mL/min eluate stream to the mass spectrometer, eliminating the need for an external pump in the system. The viability of the coupling is demonstrated with a three-dye mixt. composed of fat red 7B, solvent green 3, and solvent blue 35 sepd. and eluted from a silica gel-coated rotor using toluene. The real-time characterization of the dyes eluting from the rotor is illustrated in pos. ion full-scan mode. Other self-aspirating ion source systems including atm. pressure photoionization, electrospray ionization, and inductively coupled plasma ionization, for example, might be configured and used in a similar manner coupled to the chromatograph to expand the types of analytes that could be ionized, detected, and characterized effectively. .