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Polyurethane pressure-sensitive adhesives as raw materials for the manufacturing of protective films

100%
Łągiewczyk M., Czech Z.
Polish Journal of Chemical Technology
|
2011
|
vol. 13
|
issue 1
47-50
EN
The present paper relates to water-borne polyurethane pressure-sensitive adhesives (PU-PSA) systems for self-adhesive protective films, and methods of their preparation. The typical protective films are self-adhesive films with excellent removability. Their manufacture is a film conversion process using common materials developed for the packaging industry (PVC and polyolefins). The most often used carrier for the constructions of protective films is PE. Polyurethane PSA layers are characterized by constant low peel adhesion between 3 and 5 N/2,5 cm.
2
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Oxidation of hexafluoropropylene to hexafluoropropylene oxide using oxygen

100%
Łągiewczyk M., Czech Z.
Polish Journal of Chemical Technology
|
2010
|
vol. 12
|
issue 2
1-3
EN
A method for pressure oxidation of hexafluoropropylene (HFP) to hexafluoropropylene oxide (HFPO), using oxygen, is presented. Oxidation was achieved in a batch-fed reactor at temperature range between 130 to 170°C. The influence of temperature and kind of solvents, such as 1,2,2-trichloro-1,1,2-trifluoroethane (CFC-113) and carbon tetrachloride on the yield of HFPO and the course of oxidation was investigated in preliminary studies. The maximum HFPO yield of approximately 83% was noticed.
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