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Polyurethanes aminolysis

Polyurethanes (PUs, PURs), 197-258 ammonolysis and aminolysis of, 556 analytical techniques for, 241-246 applications, properties, and processing methods for, 198, 202-205 application testing of, 244-245 blood contact applications for, 207 chemical structure of, 5 chemistry and catalysis of, 222-236, 546... [Pg.598]

Chicago, IL, 26th-30th August 2001, p.506-7.012 CURING BEHAVIOR OF EPOXY RESIN WITH AMINOLYSIS PRODUCTS OF WASTE POLYURETHANES... [Pg.31]

Rigid polyurethane foams were prepared at room temperature using eommercial polyols and polymerie 4,4 -diphenyl methane diisoeyanate, and used to study their reeyeling by aminolysis. The reaction products obtained by treatment with diethylene triamine at 180 C were evaluated as hardeners for epoxy resins. The exothermie heats of euring were determined over the temperature range 60-80 C by differential scanning calorimetry. A reaction order of 2.2-2.4 was obtained. 8 refs. [Pg.31]

Similarly, a recent patent combines aminolysis and hydrolysis reactions for achieving polyurethane decomposition.98 Thus, scrap polyurethane is reacted with a mixture of diethanolamine and aqueous sodium hydroxide. The simultaneous attack of these agents on the polymeric chains allows the reaction time to be appreciably shortened. The reaction product, obtained as an emulsion, is subjected to a second treatment with propylene oxide in order to transform the amines and ureas present in the mixture into polyols, giving a final product which is substantially free of any hydrogen-containing nitrogen atoms. The polyols produced have been found to be particularly suitable for the preparation of fresh polyurethane polymer which can be used as an elastomer or flexible foam. [Pg.52]

USE OF MUSTARD AMINOLYSIS PRODUCTS AS CATALYSTS FOR POLYURETHANE FOAM PRODUCTION... [Pg.165]

Use of Mustard Aminolysis Products as Catalysts for Polyurethane Foam Production... [Pg.207]

Czuprynski B, Paciorek-Sadowska J, Liszkowska J and Czuprynska J (2002) The utilization of rigid polyurethane-polyisocyanurate foams by the combined alcoholysis-aminolysis process, Polimery (Warsaw) 47 104-109. [Pg.595]

See other pages where Polyurethanes aminolysis is mentioned: [Pg.554]    [Pg.554]    [Pg.31]    [Pg.315]    [Pg.287]    [Pg.416]    [Pg.52]    [Pg.55]    [Pg.56]    [Pg.77]    [Pg.425]   
See also in sourсe #XX -- [ Pg.49 ]



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