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METHYLENE CHLORIDE PROJECT

Better solutions for paint stripping

Methylene chloride, also called dichloromethane, is a

volatile, colorless liquid with a chloroform-like odor.

Methylene chloride is a widely used solvent and chemical component in Massachusetts and nationally.

Major industries of use are industrial cleaners, a chemical testing laboratory, and as paint strippers

Introduction to MC

Chronic health effects: a) Carcinogen b) Neurotoxin c) Hepatotoxin Acute health effects: Very hazardous in case of eye contact (irritant), of ingestion, of inhalation

Causes for concern:

MC is a reportable Toxic Release Inventory (TRI) chemical and is listed as a hazardous air pollutant under the Clean Air Act.

The OSHA methylene chloride standard covers all occupational exposures to methylene chloride in all workplaces in general industry.

The TURA Science Advisory Board (SAB) has recommended designating methylene chloride as a higher hazard substance under TURA.

What is being done?

Effective January 1, 2014 , affected facilities will be required to report on their use of methylene chloride starting in reporting year 2014 (reports due July 1, 2015), and will be required to develop Toxics Use Reduction plans in 2016.

The reporting threshold for methylene chloride use would be lowered to 1,000 lb/year for companies in TURA-covered industry sectors with ten or more employees.

New companies entering the program under the lower reporting threshold would be required to file annual toxics use reports, pay annual toxics use fees, and develop a toxics use reduction plan every two years.

Toxic Use Reduction Act

Paint stripper are a current focus

Product testing and SOPs are developed, but under experimentation.

An array of paints and strippers used.

Data analysis under progress to identify pattern between efficiency and key ingredients.

At TURI …

Product testing: Stripping agents: Acrostrip 600 BG Soy Gel Kleen Strip Citris stripping el Take off green ceiling

paint Chimista Green 100

Contaminants: Gliden: Ceiling Latex

paint Miniwax, polyurathane

based ceiling paint Zinsser Bulls-eye 1.2.3 Krylon Latex Enamel Behr Premium

interior/exterior

Key ingredients

Propylene Glycol Potassium Hydroxide Ethylene Glycol Phenyl Benzyle Alcohol Titanium Dioxide Sodium Glucoheptonate Sodium Hydroxide Diproplene Glycol Ethy Ether, Dpg Monoethyl Ether, Furfuryl Alcohol

Initial gloss reading of the non-painted substrate was recorded. Substrates were coated with two coats of ceiling paint. (The second coat was applied after allowing the first coat to sit and dry for 2 hours. ) After allowing the coats to fully air dry, the gloss reading of the

painted substrate was recorded. The substrates were coated in stripping solution for 5 minutes

with a 1/16th – 1/8th layered coating of the stripping gel solution. After five minutes of sitting, the coupons were scraped with a

paint scraper for five minutes. The gloss readings were retaken and the coupons were inspected

for signs of paint removal.

Standard Operation Procedure

DateRun:8/25/2014

Experimenters: Marshall, Nguyen, Liang Substrates: White Painted Latex Wood Floor tiles Contaminant: Glidden – Ceiling Latex Paint

Cleaning Methods: Manual scrape

Analytical Methods: Visual and Gloss

Sample testing

Cleaner Coupon # % Removed Average % Removed

% Original Change in gloss

Average % Original Change in gloss

L* G L* G

Acrastrip 600 BG Ceiling Paint 1 86 4.61 55.56 6.31 49.85

2 83 6.87 24.00

3 83 84 7.45 70.00

Soy Gel Ceiling Paint 4 88 0.26 -5.00 2.19 18.85

5 90 2.69 61.54

6 86 88 3.63 0.00

Kleen Strip-X Stripper Ceiling Paint 7 84 2.51 -8.82 5.40 18.91

8 79 8.58 5.56

9 79 80.67 5.11 60.00

CitriStrip Stripping Gel 10 72 11.56 186.36 7.40 63.54

11 73 3.93 -18.46

12 72 72.33 6.71 22.73

Take Off Green Ceiling Paint 13 86 7.52 110.53 4.69 76.55

14 84 2.14 95.00

15 86 85.33 4.42 24.14

Sample results

Cleaner coupon number Gloss Initial Gloss Dirty Gloss Final % Change

Safe Care EZ-Solv - ceiling paint 6 3.1 1.9 3.8 22.58

Bio Solv - ceiling paint 1 2.5 1.9 2.5 0.00

Soy Stripper - ceiling paint 11 2.4 1.9 1.9 20.83

Safe Care EZ-Solv - latex enamel 2 2.6 4.9 3.6 38.46

Bio Solv - latex enamel 7 2.6 4.3 1.4 46.15

Soy Stripper - latex enamel 12 2.9 8.1 1.4 51.72

Safe Care EZ-Solv - Polyurethane 3 3 5 2.5 16.67

Bio Solv - Polyurethane 8 4 29.3 6.2 55.00

Soy Stripper - Polyurethane 13 3.2 35.6 3.2 0.00

Safe Care EZ-Solv - 123 Primer 4 2 9.4 5 150

Bio Solv - 123 Primer 9 2.9 9.7 1.5 48.28

Soy Stripper - 123 Primer 14 2.9 9.6 2.7 6.90

Safe Care EZ-Solv – Behr Premium 5 2.5 2.2 4.6 84.00

Bio Solv – Behr Premium 10 3.2 2.3 2.4 25.00

Soy Stripper - Behr Premium 15 3.4 2.2 1.5 55.88

Sample testing

Cleaner Coupon # Initial Dirty Final %DET Avg

L* L* L*

Acrastrip 600 BG Ceiling Paint 8 69.14 88.17 70.77 91.43 94.17

11 64.17 89.67 66.82 89.61

7 70.86 87.9 70.61 101.47

Take Off Green Ceiling Paint 16 74.04 90.01 65.95 150.66 107.62

2 68.72 90.29 70.7 90.82

13 65.85 89.86 70.32 81.38

Soy Gel Ceiling Paint 17 73.65 90.14 70.37 119.89 102.37

3 66.68 90.29 69.04 90.00

4 69.99 90.47 70.56 97.22

CitriStrip Stripping Gel 9 66.04 90.33 66.86 96.62 89.18

12 64.52 90.3 70.6 76.42

1 71.31 89.99 72.34 94.49

Kleen Strip-X Stripper Ceiling Paint 5 66.85 90.23 69.26 89.69 70.41

6 67.94 89.77 71.79 82.36

10 70.71 89.8 70.19 102.72

Sample testing

With decreasing effectiveness: 1. Soy Gel 2. Citris stripping el 3. Chimista Green 100 4. Take off green ceiling pain 5. Acrostrip 600 BG 6. Kleen Strip

Results of Phase I

Expand database of contaminants and effective alternatives.

Move to other MC based industries.

What is next?

THANK YOU!

Toxics Use Reduction Institute: Summary of Policy

Analysis

Methylene Chloride MSDS: http://www.sciencelab.com/msds.php?msdsId=9926060

OSHA regulations: Title 29 Code of Federal Regulations, Parts 1910.1052, 1915.1052, and 1926.1152

TURUI Cleaning Laboratory: Evaluation Summary

REFERENCES