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Client #19

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Project Number 1

Summary:

The lab found two possible cleaning solutions, Tsquare HTF 85 B and US Polychem 69 MC. Pilot scale testing of the 69 MC yielded inadequate dissolving of the coating. HTF 85 B was as effective as the NMP.

Test Objective:

To determine optimum conditions and materials to clean stainless steel surfaces contaminated with polyurethane.

Product Use:

Simulation of chemical reactor walls and mixing blades. We propose to the use of small stainless steel parts to simulate reactor walls.
Trial Number Date Run Purpose Success Rating
0 02/01/1996 Preliminary lift test Preliminary compatibility tests on substrate coupons encouraging for at least one cleaning chemistry. More in-depth laboratory testing necessary.
1 02/05/1996 Eight chemistries were tested in phase 1 Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.
2 02/20/1996 To test the soil loading characteristics Results suggest a scale-up feasible match for cleaning chemistry and equipment. Pilot plant study with actual parts recommended.
3 03/04/1996 To determine the most effective aqueous cleaner Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.
4 03/08/1996 To determine temperature dependance A follow up test, usually based on company input.
5 04/04/1996 Determine amount of 69MC tolerated in DI rinse A follow up test, usually based on company input.
6 04/08/1996 To determine the amount of foam generation A follow up test, usually based on company input.