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OAR Box 1413 

Prepped by Ollie Stewart 

Document Number: 

9) 11-1-9 

Docket Number: 

A-94-52 

Printed 7/9/2008 3:11:20 PM Sheet 9 of 114 
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Rule 74.14 Polyester Resin Material Operations 

(Adopted 11/24/87, revised 5/26/92) 

A. Applicability 

1. This mile is applicable to the manufacturehofjr.protiucta»if')3om pr the 

use of polyester resin material. **"""* "~~~~"* 

2. Any mantifactrurlng process using polyester resin materials vhich is 

exempt from this rule pursuant to Section C.2, shall comply vith 

the provisions of Rule 66. 

B. Requirements 

1. All polyester resin material shall comply vith one or more of the 

following requirements: 

a. For all formulations, the reactive organic compound (ROC) 

loss rate shall be less than or equal to 60 grams per square 

meter of exposed surface area during resin polymerization; 

or 

b. For all formulations except specialty resins and gel coats, 

the monomer content of the material shall be no more than 35 

percent by weight as applied and as determined by 

manufacturers specifications. 

For all specialty resins, the monomer content of the 

material shall be no more than 50 percent by weight as 

applied and as determined by manufacturers specifications. 

For all gel coats, the monomer content of the material shall 

be no more than 45 percent by weight as applied for 

pigmented gel coats and 50 percent by weight as applied for 

clear gel coats, as determined by manufacturers 

specifications; or 

c. Application of the material shall occur using a closed-mold 

system. 

Complying formulations shall not be thinned or diluted vith any 

ROC or changed in any manner that may increase ROC emissions after 

testing, but prior to or during application. 

2. Airless, air-assisted airless, electrostatic, or high volume-low 

pressure spray equipment shall be used in any spray application, 

except for touch-up or repair using a hand-held, air-atomized 

spray gun utilizing an attached resin container of no more than 

one quart capacity. 

3. Cleaning material used on lines, rollers, brushes, spray equipment 

and personnel, and containing more than 1.7 pounds of ROC per 

gallon of material as applied, or where the initial boiling point 

is less than 190 degrees Celsius, shall be limited in use to less 

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Attachment 3B 
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than fifteen (15) gallons per calendar week -unless a reclamation 

system is used. Residues from on-site reclamation systems shall /" 

contain no more than 20 percent ROC by veight and shall be V 

disposed of in a manner consistent vith federal, state and local 

hazardous vaste regulations. 

4. In lieu of compliance with the provisions of Subsection B.l and 

B.2, a person may elect to reduce reactive organic compound 

emissions from the application process by a total capture and 

control efficiency of at least 85 percent by weight, but no less 

than the percent reduction achievable through the application of 

Subsections B.l and B.2. Control efficiency shall be continuously 

monitored across an emission control device, the results of which 

shall be averaged over a rolling 24 hour period. Touch-up or 

repair work shall not be excluded from this subsection. 

5. All materials containing reactive organic compounds, used or 

unused, including but not limited to semi-solid or liquid 

polyester resin materials and solid or liquid cleaning materials, 

shall be stored in closed containers. 

C. Exemptions 

1. Any polyester resin material operation subject to the requirements 

of this Rule shall be exempt from the requirements of Rule 66, 

with the exception of Rule 66.A.7. 

2. The provisions of Section B of this rule shall not apply to 

stationary sources using not more than 20 gallons per month of 

polyester resin material. 

D. Recordkeeping 

A person subject to the provisions of this Rule shall maintain the 

following records. Such records shall be made available to the AFCO 

upon request and shall be maintained for not less than tvo years from 

the date of each entry. The records shall contain: 

1. Weekly reports (Initialed by operator) of the following 

information: 

a. The manufacturer and product number of each polyester resin 

material and cleaning material used, and amount of cleaning 

material both used and reclaimed or recycled. 

b. The application method for each polyester resin and cleaning 

material used. 

2. The emission rate of each polyester resin material used, as 

either the ROC loss rate in grams per square meter (gm/m ) or as 

monomer content in percent by weight, and the gel time. For 

cleaning material, the ROC content in pounds of ROC per gallon of 

material as applied. Documentation shall be available to support 

these records. 

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3. Daily reports of the continuous control efficiency monitoring 

information required in Subsection B.4, if applicable. Daily 

reports shall include the quantity and type of polyester resin 

material used. 

A person operating under the provisions of Subsection C.2 of this rule 

shall, in lieu of Subsections 1, 2, and 3 above, maintain monthly 

records of the amount of polyester resin material used. 

Test Methods 

1. Compliance with Subsection B.l.a shall be determined by laboratory 

static test, as described in Attachment A. Test results shall be 

submitted to the APCO for approval in writing and a copy of the 

test results shall be retained at the worksite. 

2. Compliance with the requirements of Subsections B.l.b shall be 

determined using ASTM method D2369-81. Material tested shall be 

non-catalyzed. 

3. Capture efficiency determinations required in Subsection B.4 shall 

be based on criteria set forth by EPA in 55 Federal Register (FR) 

26865, June 29, 1990. 

4. Control efficiency determinations required in Subsection B.4 shall 

be made using EPA Method 25A. Gas flow rate measurements ln pipes 

or small ducts shall be made using EPA Method 2A. 

5. Compliance with the requirements of Subsection B.3 of this rule 

shall be determined as follows: 

a. For pounds of ROC per gallon of material, EPA Method 24. 

b. For initial boiling point, ASTM method D1078-86. 

c. For ROC content in residue, ARB Method 401. 

6. Exempt organic compounds shall be determined by using ASTM method 

D4457-85. 

Violations 

Failure to comply with any provision of this rule shall constitute a 

violation of this rule. 

Definitions 

1. "Closed-mold System": A method of forming objects from polyester 

resins that involves placing the polyester resin material in a 

confining mold cavity and applying pressure and/or heat. 

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2. "Cure": To transform or polymerize material from a liquid state to 

a solid or semi-solid state in vhich the desired physical 

properties, including hardness, are achieved. 

3. "Electrostatic": A sufficient charging of atomized droplets to 

cause deposition principally by electrostatic attraction. This 

application method shall operate at a minimum of 60 kilovolts. 

4. "Exempt Organic Compounds": As defined in Rule 2. 

5. "Gel Coat": A polyester resin material, either pigmented or clear, 

used to provide laminated surfaces vith exterior cosmetic 

enhancement and improved resistance to degradation from exposure 

to the elements. 

6. "Pounds of ROC per Gallon of Material": The weight of ROC per 

volume of material, as calculated by the equation, 

Pounds of ROC per Gallon of Material - (Ws-Ww-Wes)/Vm 

Where 

Ws - weight of volatile compounds in pounds 

Ww - weight of water in pounds 

Wes - weight of exempt organic compounds in pounds 

Vm - volume of total material in gallons 

7. "High Volume-Low Pressure (HVLP)": Spray equipment which uses a 

high volume of air delivered at pressures between 0.1 and 10 psig 

and which operates at a maximum fluid delivery pressure of 100 

psig. 

8. "Monomer": An organic compound that combines with itself or other 

similar compounds to became a cured thermoset resin. 

9. "Polyester Resin Material": Unsaturated polyester resins, such as 

isophthalic, orthophthalic, halogenated, bisphenol A, vinyl ester, 

or furan resins; cross-linking agents, catalysts, gel coats, 

inhibitors, accelerators, promoters, and any other material 

containing ROC and used in a polyester resin manufacturing 

process. Inert filler and cleaning material is specifically 

excluded from this definition. 

10. "Reclamation System": Equipment capable of reclaiming spent 

solvent for re-use. Reclamation systems may be operated on-site 

or by an off-site commercial reclamation facility. 

11. "Repair": That portion of the fabrication process that requires 

the addition of polyester resin materials to portions of a 

previously fabricated product in order to mend damage Immediately 

following normal fabrication operations. 

12. "ROC": Reactive Organic Compound, as defined in Rule 2. 

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13 "Specialty Polyester Resin Material": Halogenated, furan, 

bisphenol A, vinyl ester, or isophthalic resins used to make 

products for corrosive, fire retardant, high strength, or mold 

making services. 

14. "Touch-up": That portion of the fabrication process that is 

necessary to cover minor imperfections. 

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ATTACHMENT A 

LABORATORY STATIC TEST FOR POLYESTER RESIN MATERIAL 

1. PRINCIPLE 

A weighed amount of polyester resin material is reacted with methyl 

ethyl ketone peroxide (MEKP) catalyst to form a 14.5 cm diameter 

casting. The ROC loss rate is determined at room temperature (77 ±3°F) 

and 50X room humidity over a specified time period. 

This method is applicable only to polyester resin materials and does not 

simulate spray booth operations. 

2. APPARATUS 

a. Analytical balance, top loading, capable of measuring within 0.01 

gram. 

b. Gallon can lid or equivalent. The lid should be 14.5 cm inside 

diameter (165.13 sq cm). Different size lids should be measured 

prior to testing. 

c. Paper clip, bent 90 degrees. 

d. Clock or timer capable of reporting time to a precision of 0.01 

minute. 

e. Constant temperature and humidity room, as described above. Room 

must also be free of drafts. If a constant temperature room is 

not available, measure temperature and humidity prior to each 

weight measurement or test procedure. 

3. DETERMINATION OF ROC LOSS 

NOTE: The mixing should be done in a hood or in a veil ventilated area. 

a. Place the bent paper clip on a gallon can lid, or equivalent. 

b. Tare weigh to ±0.01 grams (g) the gallon can lid and clip. Record 

the weight as ?*[. 

c. Catalyze 200 grams of polyester resin material with the 

recommended type and amount of catalyst and promoter. Ensure that 

the resin temperature is 77 degrees at catalyzation. 

d. Add 100 g (±0.05 g) of catalyzed polyester resin material to the 

gallon can lid. Record the weight of the lid plus the polyester 

resin material to ±0.01 g as W2. Start timer. 

e. At five (5) minute intervals, record the gross weight loss to 

±0.01 g as Wt and check the catalyzed resin for gel point. 

Gelling has occurred when the resin tears or the can lid raises 

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