Oldenburg sculpture with polyurethane reversion

Meghan Thumm Mackey <meghan [at] alumni__princeton__edu> writes

>I would be grateful to hear from anyone who has worked with one of
>the series of polyurethane sculptures by Claes Oldenburg entitled
>Soft Screw. Thirty-one sculptures in this series were cast by Gemini
>G.E.L. between 1974 and 1976, and some of them exhibit "reversion",
>evidenced by the polyurethane becoming sticky and viscous.

Our team worked on polyurethane sculpture with similar problems. We
have obtained significant results consolidating the polyurethane
with hexamethylene diisocyanate 5% in acetone, which re-hardened the
depolymerized polyurethane. You can found more information in our
publication, unfortunately available only in Italian, that you can
ask us for.

    Stage Evidence 2002 (Fotocopiatrice). Ricerche per il Restauro
    di una Gomma Poliuretanica

    VII Congresso Nazionale IGIIC
    Lo Stato dell'Arte
    Napoli, 8-10 Ottobre 2009

    F. Capanna, G. De Cesare, P. Miracola, G. Sidoti,
    restauratori del Laboratorio di restauro dei materiali dell'arte
    contemporanea

    francesca.capanna<-a t->beniculturali< . >it;
    grazia.decesare<-a t->beniculturali< . >it
    Chimico, Laboratorio di prove sui materiali

    giancarlo.sidoti<-a t->beniculturali< . >it
    Istituto Superiore per la Conservazione e il Restauro
    Via S. Michele, 23
    00153 Roma

Giancarlo Sidoti
Chimico - Laboratorio Prove sui Materiali
Istituto Superiore per la Conservazione ed il Restauro (IsCR)
Via di San Michele, 23
00153 Roma
+39 06 6723 6616


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                  Conservation DistList Instance 24:52
                   Distributed: Sunday, May 22, 2011
                       Message Id: cdl-24-52-002
                                  ***