SPRAYFOAM Professional - Summer 2013 - (Page 16)

SAFETY FIRST EFFECT OF VENTILATION RATES ON APPLICATOR EXPOSURE DURING SPF APPLICATION CPI PROVIDES UPDATE ON RESEARCH PROJECT BY HEATHER PALFREY, MANAGER, ENVIRONMENTAL, HEALTH & SAFETY AMERICAN CHEMISTRY COUNCIL, CENTER FOR THE POLYURETHANES INDUSTRY I ndustrial hygiene air monitoring was conducted in support of the Center for the Polyurethanes Industry (CPI) SPF Ventilation Research Project. The research plan for this project was detailed in SPFA’s Fall 2012 SPRAYFOAM Professional magazine. The purpose of this research is to evaluate the impact of changes in ventilation rates on the concentration of chemical vapors and particulates emitted during SPF application. This research consists of three phases: 1) Testing of spray equipment and generic formulations; 2) Monitoring chemical emissions during SPF application under controlled environmental conditions; and 3) Conducting field testing to verify Phase 2 results. Click here to read more about the project phases: www.nxtbook.com/nxtbooks/naylor/SPFQ0312/index. php#/16 Emissions from three SPF formulations were evaluated: a low density (1/2-pound) high pressure SPF, a mediumdensity (2-pound) high pressure SPF, and a low-pressure, two-component SPF kit. These three generic formulations were developed in Phase 1 of the project to be representative of formulations currently available in the SPF marketplace. and fire retardant were measured during the experiment. Below is research finding on MDI and pMDI. RESEARCH FINDINGS FOR MDI AT 10.4 ACH As shown in Figure 1 the concentrations of 4,4’-methylene bisphenyl isocyanate (4,4’-MDI) were detected during spraying of both the low and medium density SPF formulations (0.011 to 0.037 parts per million or ppm), but not during spraying of the kit formulation (0.0012 to 0.004 ppm). The concentrations of 4,4’-MDI, 2,4’-MDI, and polymeric MDI (pMDI) were highest during spraying of the medium density formulation, next highest during spraying of the low density formulation, and lowest during spraying of the kit formulation. PHASE 2 UPDATE The test chamber was approximately 8’ x 8’ x 8’ with a ventilation rate of 85 cubic feet per minute, or 10.4 air changes per hour (ACH) assuming perfect air mixing. Air flow was perpendicular to the worker and the spray application. The worker applying each SPF formulation wore portable sampling pumps with the sampling media placed in the vicinity of the worker’s breathing zone. Area samples were located several feet behind the applicator, at a height of approximately 6.5 feet. After approximately 15 minutes of spray time, the applicator exited the test chamber and the personal and area samples were retrieved. The sprayed cardboard inserts were left inside the test chamber. A second set of “post-spray” area samples were collected for one hour beginning 30 minutes after spraying stopped. After the second set of area samples were completed, the sprayed cardboard inserts were removed and the test chamber was allowed to purge for two hours before starting another test run. A total of four runs were completed across two days for each of the three generic SPF formulations. The spray applicator’s exposure and room concentrations of MDI, pMDI, amine catalyst, blowing agent, 16 SPRAYFOAM PROFESSIONAL | Summer 2013 Figure 1: 2,4-MDI and 4,4–MDI (Average of 4 sessions 15 min/session at 10.4 ACH) Figure 2: pMDI (Average of 4 sessions - 15 min/session at 10.4 ACH) http://www.nxtbook.com/nxtbooks/naylor/SPFQ0312/index http://www.naylornetwork.com/spfa/

Table of Contents for the Digital Edition of SPRAYFOAM Professional - Summer 2013

Executive Director's Corner- The Hose to Nowhere
President's Post - Feast, Famine ...& Friends!
Foam Business News
Safety First - Effect of Ventilation Rates on Applicator Exposure During SPF Application
Checklist - How to Reduce Exposures During SPF Application
Legislative Update - The Immigration Reform and Construction
Behind The Foam - Rob Tollen and George Tollen: Selling a Product They Believe In
Speaking Sensibly
2013 SPFA Contractor Awards
Ask the Expert - Perfecting Your Masking and Trimming
Upcoming Events
Index of Advertisers

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