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13.
Glycolysis of Waste Rigid Polyurethane
Foam (PUF) and the Use of Recycled in New Foam Formulation
Mir
Mohammad Alavi Nikje1*, Moslem Haghshenas2, Amir
Bagheri Garmarudi1,2, Naser Barzandeh3 and
Kambiz Taheri3
1Department
of Chemistry, Faculty of Science, Imam Khomeini International
University, Qazvin, Iran.
2Polymer
& Chemistry Laboratory, Engineering Research Institute, Tehran, Iran.
3PCP
Industrial Coatings Company, Chamran Freeway, Tehran, Iran.
Email address:
alavim2006@yahoo.com
Abstract:
Waste and scraps from polyurethane (PU)
rigid foams converted into a liquid phase containing active hydrogen
groups -which are essential in PU formulation- by a glycolysis process.
Various basic catalysts, destroying agents and reaction conditions
were evaluated in order to obtain the optimum polymer / solvent ratio
and reaction time. GPC and GC techniques were used to insure reaction
completion and achieving suitable reaction conditions. FT-IR spectra
of recyclate and virgin one showed that were similar to each other of
the two samples. The produced recyclate was blended with virgin polyol
and with different polyol/
diphenylmethane diisocyanate
(MDI) ratio was tested by low pressure reaction injection molding (RIM)
machine and the physical and chemical properties of the product and
polyol blend were evaluated.
 Keywords:
Glycolysis; Waste Polyurethane; Recycling; Rigid Foam
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