Six products were selected based on client request for vapor degreasing solvents. Each product was used at full strength in a 250 ml beaker and heated to 96 F on a hot plate. Eighteen preweighed aluminum coupons were coated with the Soltex Polybutene 32 (9003-29-6) using a hand held swab. Coupons were weighed a second time to determine the amount of soil added to each coupon. Three coupons were cleaned in each solution for 5 minutes using stir-bar agitation. After cleaning parts were weighed a final time and efficiencies were calculated.
Four of the products, 71DE, AK 225, CCA and MCA, removed over 94% of the soil in the five minutes of immersion cleaning. The other two products removed less than 20%. Even after increasing cleaning time to ten minutes, these two products had only marginal success, removing less than 40%. The table below lists the amount of soil added, remaining and efficiencies for each coupon cleaned.
| Cleaner
|
Initial wt
|
Final wt
|
% Removed
|
| HFE 7100
|
0.6255
|
0.4415
|
29.42
|
|
|
0.3452
|
0.3569
|
-3.39
|
|
|
0.5307
|
0.5216
|
1.71
|
| HFE 7200
|
0.2486
|
0.2254
|
9.33
|
|
|
0.4331
|
0.38
|
12.26
|
|
|
0.4522
|
0.2914
|
35.56
|
| HFE 71DE
|
0.4494
|
0.0091
|
97.98
|
|
|
0.3842
|
0.0171
|
95.55
|
|
|
0.4593
|
0.0062
|
98.65
|
| AK 225
|
0.3207
|
0.0157
|
95.10
|
|
|
0.5828
|
0.0309
|
94.70
|
|
|
0.5086
|
0.0393
|
92.27
|
| HFE 7100 (10 min)
|
0.6255
|
0.4209
|
32.71
|
|
|
0.3452
|
0.3468
|
-0.46
|
|
|
0.5307
|
0.4635
|
12.66
|
| HFE 7200 (10 min)
|
0.2486
|
0.2059
|
17.18
|
|
|
0.4331
|
0.2221
|
48.72
|
|
|
0.4522
|
0.2140
|
52.68
|
| CCA
|
0.8681
|
0.0234
|
97.30
|
|
|
0.5975
|
0.0041
|
99.31
|
|
|
1.0897
|
0.0532
|
95.12
|
| MCA
|
0.4396
|
0.0211
|
95.20
|
|
|
1.0074
|
0.0182
|
98.19
|
|
|
0.6466
|
0.0126
|
98.05
|