Hard, optically clear polyurethane articles

Details Hard, optically clear polyurethane articles Hard, optically clear polyurethane articles

C - Chemistry, Metallurgy

08

G

402/133

C08G 18/44 (2006.01) C03C 1/00 (2006.01) C08G 18/65 (2006.01)

Patent

CA 1114988

Abstract of the Disclosure Polyurethane compositions characterized by being heat curable to yield hard, impact-resistant articles having a high heat distortion temperature are disclosed. The cured polyurethane articles are trans- parent and also hydrolytic and UV light stable as well as being abrasion resistant. The polyurethane is prepared from a cycloaliphatic polyiso- cyanate, low molecular weight active hydrogen-containing material and optionally a polycarbonate diol. The weight percentage of the urethane moieties and the crosslinked density are carefully controlled so as to provide the proper balance of physical properties, particularly between hardness, flexibility and heat distortion temperature. The polyurethane articles are particularly useful in glazing applications such as aircraft glazing.

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