Debbie Decker- Here is more information from our Rubber Chemicals section- Jan Galloway Product Safety and Regulatory Affairs Crompton Corporation jan_galloway**At_Symbol_Here**cromptoncorp.com (203)573-3619 phone (203)573-4531 FAX -----Original Message----- From: Ohm, Bob - Middlebury, CT Sent: Tuesday, July 27, 2004 1:16 PM To: Galloway, Jan - Middlebury, CT; Hannon, Marty - Middlebury, CT Subject: RE: [DCHAS-L] Latex Glove degeneration With the onset of summer, ozone concentrations in the air become higher. This is particularly true in areas with high levels of airborne particulates (smog), usually more of an issue in the Los Angeles area (see www.aqmd.gov), rather than northern California. Ozone will crack natural rubber (including latex) articles if they are stored in the stretched state. Ozone can be distinguished by cracks that grow perpendicular to the direction of stretch. Sunlight exposure can also cause cracking, but in this instance the cracks are more random or hatched in orientation, often like the skin of an alligator. In unstretched articles, ozone can cause a whitish-gray discoloration of the surface. The remedy to prevent ozone attack (short of cleaning up the air) is to incorporate into the rubber during fabrication a wax of defined composition, e.g. a Sunproof® wax. Very truly yours, Bob Ohm Crompton Corporation, Uniroyal Products 12 Spencer Street, TSSC Building Naugatuck, CT 06770 phone: 800-243-5098 direct: 203-720-6825 fax: 203-720-6204 e-mail: bob.ohm**At_Symbol_Here**cromptoncorp.com visit our web site at www.cromptoncorp.com -----Original Message----- From: Galloway, Jan - Middlebury, CT Sent: Tuesday, July 27, 2004 9:33 AM To: Ohm, Bob - Middlebury, CT; Hannon, Marty - Middlebury, CT Subject: FW: [DCHAS-L] Latex Glove degeneration Gentlemen- Can you suggest a solution to this question?? Jan Galloway -----Original Message----- From: Debbie Decker [mailto:dmdecker**At_Symbol_Here**UCDAVIS.EDU] Sent: Monday, July 26, 2004 7:40 PM To: DCHAS-L**At_Symbol_Here**LIST.UVM.EDU Subject: [DCHAS-L] Latex Glove degeneration Hi Gang: Excusing the cross-posting.... We have researchers whose latex gloves, rubber bands and other latex-containing articles degrade at an alarming rate. This is annoying. Lately, a photographer in this building has found her images degrading as well. This is now causing consternation amongst building occupants. All the obvious have been checked - it is a laboratory building with one-pass air and the degradation is not localized to a single floor or lab. Ideas? Don't be shy about suggesting the outrageous. Thanks, Debbie Debbie Decker EH&S UCDavis (530)754-7964 dmdecker**At_Symbol_Here**ucdavis.edu Co-Conspirator to Make the World A Better Place -- Visit www.HeroicStories.com and join the conspiracy Birkett's hypothesis: "Any chemical reaction that proceeds smoothly under normal conditions, can proceed violently in the presence of an idiot."
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