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Trial Number 3

Trial Purpose:

Mixtures of best terpenes & aqueous cleaners

Date Run:

12/27/1995

Experiment Procedure:

The purpose of this experiment is to find a cleaner for Adhesive Manufacturer that will replace their current 4:1 heptane-toluene mixture. As of today, no aqueous or terpene chemistries have been effective. The alkene hydrocarbons from CSA (Bio-Safe 1023 & 1024) are the best performing chemistries to date. Today's test will be to try mixtures of the best terpenes and aqueous cleaners. A combination of the dissolving effects and the lifting effects of each of these cleaners might be good.
The best solvents tested to date were Solvent Kleene D-greeze 500, Oakite Inproclean 4000 T and the CSA chemicals. The best aqueous chemistries tested to-date are the AW Chesterton 803 Marine Solvent, MacDermid ND-17 and Brulin Compliance.
Each chemistr0y was mixed up at a 50:50 ratio, one aqueous cleaner with a terpene solvent. Duro-Tac adhesive was allowed to sit on the coupons for 10 to 15 minutes. Cleaning solution was allowed to set on the contaminated coupons for thirty seconds.
SUBSTRATE MATERIAL: 316 Stainless Steel Coupons
CONTAMINANTS: Duro-Tac toluene-heptane based adhesive
CONTAMINATING PROCESS USED: Adhesives applied on with swab and allowed to sit for 10 minutes to 15 minutes

Trial Results:

Mixture Time of Removal    
AW Chest & D-greeze 500 35 seconds
AW Chest & Oakite 4000T 65 seconds
AW Chest & CSA 1023 50 seconds
ND 17 & D-greeze 500 35 seconds
ND 17 & 4000-T 50 seconds
ND 17 & CSA 1023 50 seconds
Brulin & D-greeze 500 55 seconds
Brulin & Oakite 4000T 65 seconds
Brulin & CSA 1023 55 seconds

Success Rating:

Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.

Conclusion:

Either a mixture of AW Chesterton & D-greeze 500 or the ND 17 & D-greeze 500.  One final test will be performed on larger stainless steel parts to find appropriate sit times of the cleaning chemistries.

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