Trial #0
To identify an alternative cleaner for removing toluene based resin coating
Eight cleaners were selected from the lab's database of past testing and vendor information based on client supplied information. Four semi-aqueous products and four aqueous based products were chosen. The semi-aqueous products were used at full strength in 400 ml beakers while the aqueous products were used at 10%. All products were used at room temperature. Twenty-four preweighed coupons were coated with Anderson Development Co Escoat P-20 carbamic ester/aromatic hydrocarbon coating (108-88-3) using a hand held swab. Coupons were allowed to dry for two hours at room temperature. Once dry, a second weighing was performed to determine the amount of contaminant that was applied. Three coupons were immersed in each solution for 5 minutes at room temperature. Following cleaning, coupons were rinsed in a tap water bath for 15 seconds and dried using air knives for 2 minutes both at room temperature. Once dry, coupons were weighed a final time and efficiencies were calculated.
Only one product, Solsafe 245, was moderately successful after immersion cleaning. Vertec Biogold resulted in the coupon gaining weight due to inefficient rinsing of the cleaner. After coupons were wiped three quick times with a paper towel, the efficiencies went up for all cleaners. Table 1 lists the immersion cleaning results and the second table shows the results after wiping.
| Immersion Cleaning
|
| Cleaner
|
Coupon 1
|
Coupon 2
|
Coupon 3
|
Average
|
| Vertec Biogold
|
-89.23
|
-241.32
|
-214.94
|
-181.83
|
| Metabolix E3HB
|
-5.79
|
29.75
|
50.44
|
24.80
|
| Ionox HC2
|
23.38
|
24.64
|
39.78
|
29.27
|
| Solsafe 245
|
89.92
|
80.51
|
77.34
|
82.59
|
| Polyspray
|
73.10
|
62.09
|
64.94
|
66.71
|
| Beyond 2006
|
77.47
|
73.62
|
71.43
|
74.17
|
| Daraclean 200
|
33.71
|
71.55
|
65.56
|
56.94
|
| Shopmaster FF
|
77.62
|
72.11
|
56.67
|
68.80
|
| Wiped Cleaning
|
| Cleaner
|
Coupon 1
|
Coupon 2
|
Coupon 3
|
Average
|
| Vertec Biogold
|
41.23
|
81.82
|
-3.90
|
39.72
|
| Metabolix E3HB
|
40.55
|
43.34
|
68.51
|
50.80
|
| Ionox HC2
|
50.15
|
46.79
|
70.77
|
55.90
|
| Solsafe 245
|
94.96
|
88.71
|
84.9
|
89.52
|
| Polyspray
|
82.83
|
76.60
|
76.63
|
78.69
|
| Beyond 2006
|
86.53
|
81.92
|
85.42
|
84.63
|
| Daraclean 200
|
57.30
|
81.95
|
76.01
|
71.76
|
| Shopmaster FF
|
89.42
|
83.54
|
79.08
|
84.01
|
Solsafe 245 will be evaluated again using mechanical agitation.
No relation