Acetone strongly surface-bonded

As with all adhesives, substrate cleanliness is the key to strong, durable bonds. It is essential that all mold releases, oils, residual acids, etc., be removed initially. This can best be accomplished by wiping the surface with a cloth wetted with acetone or naphtha. If the surface itself is acidic, a wash in a mildly alkaline solution or treatment with a cleaning-activator solution is recommended. For metal bonding, the surface should be solvent cleaned, abraded with sandpaper, followed again by a solvent wash. 

In conclusion, on anatase, photo-oxidation of acetone limits the total oxidation, whereas on rutile, formate does so. The latter is attributed to a combination of thermal dissociation of acetone on defect sites, which aids acetone oxidation, and the strong bonding of p-formate to the (110) surface facets on rutile. A synergetic effect between anatase and rutile particles is observed, where the measured photooxidation rate from either quadrupole mass spectrometry (QMS) or DRIFTS exceeds than that for the individual constituent particles. 

Contact Type Assembly Adhesive. Modifying the above formulation to include equal parts of midblock and endblock resins with high softening points gives the contact adhesive shown in Table 14. Essentially nontacky to most surfaces, this type of adhesive bonds strongly to itself after open times of several minutes to a few hours when cast from a hex-ane/toluene/acetone solvent system in the ratio 60/20/20. 

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