US 11,988,601 B2
Method for determining residual carbamate compounds on an elastomeric article
Priyadarshini Gadgil, Roswell, GA (US); Alison S. Bagwell, Alpharetta, GA (US); Maurice Thompson, Duluth, GA (US); Zamsari Bin Zakaria, Subang Jaya (MY); and Sumsuriya Beraheng, Subang Jaya (MY)
Assigned to Kimberly-Clark Worldwide, Inc., Neenah, WI (US)
Appl. No. 17/289,534
Filed by Kimberly-Clark Worldwide, Inc., Neenah, WI (US); and Alison S. Bagwell, Alpharetta, GA (US)
PCT Filed Jun. 8, 2020, PCT No. PCT/US2020/036560
§ 371(c)(1), (2) Date Apr. 28, 2021,
PCT Pub. No. WO2021/251941, PCT Pub. Date Dec. 16, 2021.
Prior Publication US 2022/0205907 A1, Jun. 30, 2022
Int. Cl. G01N 21/25 (2006.01); G01N 21/27 (2006.01); G01N 21/29 (2006.01); G01N 21/35 (2014.01); G01N 21/3563 (2014.01); G01N 33/44 (2006.01)
CPC G01N 21/3563 (2013.01) [G01N 21/29 (2013.01); G01N 33/442 (2013.01); G01N 2021/3572 (2013.01)] 6 Claims
 
1. A method for determining an elastomeric articles propensity for staining comprising:
contacting an elastomeric article with a transition metal solution, wherein the elastomeric article is made from a nitrile polymer, wherein the transition metal solution is a saturated copper acetate solution, wherein the saturated transition metal solution comprises a ratio of 5 mg copper acetate per 1 mL of acetone; and
testing the elastomeric article for the propensity of the elastomeric article to stain, wherein the elastomeric article is tested for staining by allowing the contacted elastomeric article and transition metal solution to dwell for a period of time and visually observing the elastomeric article for discoloration, wherein the period of time ranges from 5 minutes to 2 hours.
 
6. A method for determining residual carbamate compounds on elastomeric articles comprising:
submerging an elastomeric article in an extractant for a period of time such that an extract is obtained, wherein the elastomeric article is shaken in the extractant, wherein the period of time ranges from 10 minutes to 1 hour, wherein the extractant is an acetone solution, wherein the elastomeric article is made from a nitrile polymer;
contacting the extract obtained from the elastomeric article with a transition metal solution wherein the transition metal solution is a saturated or a nearly saturated copper acetate solution, wherein the saturated transition metal solution comprises a ratio of 5 mg copper acetate per 1 mL of acetone;
visually observing the coloration of the transition metal solution contacted with the extract, wherein the color yellow indicates a presence of carbamate;
measuring an absorbance of the extract and transition metal solution at a wavelength using spectrophotometry; and
comparing the measured absorbance with reference data in order to determine a concentration of carbamate on the elastomeric article.