PUR-Strip 300 is an extremely aggressive cleaning solvent for urethanes. It was developed for use in removing cured

urethane residues from various types of polyurethane processing equipment.

 

GENERAL:
PUR-Strip 300 is a non-chlorinated, nonflammable (per DOT), non-carcinogenic, non-ozone depleting solvent designed to replace chemicals such as methylene chloride, acetone, MEK, and 1,1,1-trichloroethane. It has the benefit of being safer in the workplace and friendlier to the environment. Many alternative soaking solvents used in this application are based on solvents such as n-methyl pyrrolidone (NMP), dibasic ester (DBE), and dimethyl formamide (DMF) while the PURStrip 300 is based on completely different chemistry. This new chemistry, when combined with various glycol ethers and alkalinity sources, produces a very effective polyurethane remover that is safe to handle. PUR-Strip 300 will attack aluminum so use Dynasolve CU-5, Dynasolve 711, or Dynasolve 180 if aluminum is present on the part.

APPLICATIONS:
1. The PUR-Strip 300 is especially effective for removal of cured urethanes from processing equipment. 
2. They are effective in removal of all types of urethanes:  flexible, rigid, elastomer, or moulded; inks or paints. Effective for both MDI and TDI esters and ethers.
3. PUR-Strip 300 works by actually dissolving the polyurethane.

4. PUR-Strip 300 is not safe for use with aluminum.

TYPICAL PROPERTIES:

	PUR-Strip 300
Colour:	Colourless to light amber
Flash Point:	>150°F (lowest flashing component)
Specific Gravity:	0.96
Boiling Point	>338°F
Aggressiveness:	not safe for aluminum and other soft metals
Dissolving action:	good; will dissolve most urethanes, but will initially break the part into small pieces
Bond-breaking action:	good
DOT shipping regulation	not regulated

 

DIRECTIONS FOR USE:
For Cleaning: Immerse parts to be cleaned in PUR-Strip 300. Let soak until residue is dissolved or it is loosened and can

be wiped or brushed off. Then rinse parts with water and dry. The use of ultrasonics will produce faster results.

Mechanical filtering of larger urethane particles using a cheesecloth or metal mesh filter will help extend the life of the

solvent. Do not allow PUR-Strip 300 to come into contact with liquid isocyanates or prepolymers, as it will lead to

gelling of the solvent.

MATERIALS OF CONSTRUCTION:
Recommended:  Teflon, butyl rubber, Kalrez, steel, Halar, melamine, Nylon 101, HDPE, EPDM, polypropylene
Avoid:  Viton, PVC, ABS, Buna-N, Durel, Hypalon, Kynar, Lucite, Neoprene, PET, polyester, polysulfone, Ultem, Valox.

CAUTION and WARNING:

PUR-Strip 300 contains powerful organic solvents. It is harmful if inhaled or swallowed. Avoid breathing vapors or mist.

Keep away from heat and flame. Avoid contact with eyes and skin. Wear gloves, safety glasses, and protective clothing

when handling. Use with adequate ventilation. Refer to MSDS before use, for disposal, or additional safe handling.

AVAILABILITY AND TERMS:
PUR-Strip 100,200 and 300 are available in 1, 5 and 55 US gallon containers. These products are available from the Indianapolis manufacturing facility and may also be available from the following warehouse locations:  United Kingdom, Taiwan, Singapore. Please contact Dynaloy regarding available locations. Terms are Net 30 days, FOB shipping point.

Dynaloy, Inc. takes every precaution in the manufacture of its products. The information in this sheet is based upon our own research and is considered accurate. However, no warranty is expressed or implied regarding accuracy and results to be obtained, since operating conditions in your plant are beyond our control.