| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2011: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Research Abstract |
The pressure-sensitive adhesives having polyurethane or polyacetal structure in a main chain were newly prepared and characterized. Acetal diol monomer in these adhesives was easily transformed to diol and acetaldehyde by acidolysis, and acted as degradable unit. The adhesives have high initial adhesion intensity as 10N/20mm. By heating, the adhesion intensity of the adhesives with a thermal acid generator decreased to 0N/20mm.
We have developed the novel pressure-sensitive adhesive which can peel off easily by ultrasonic irradiation as newly external trigger. In this system, we have used the microcapsules containing a thermal acid generator which were obtained by preparing water/oil/water type emulsion. These capsules were able to destroy the wall of microcapsules by ultrasonic irradiation, and to emit thermal acid generator. The adhesive intensity of the adhesive containing the microcapsules decreased from 10N/20mm to 1N/20mm by ultrasonic irradiation for 20 minutes.
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