Abstract: The use of an organic phosphorus acid compound to extend the pot life of urethane reaction mixtures is disclosed.

Abstract: A transparent, elastomeric polyurethane useful as an interlayer in safety glass laminates is prepared by the reaction of an aromatic diisocyanate with a mixture of a polyalkylene ether glycol, a polycaprolactone triol, and a monomeric aliphatic diol.

Abstract: Energy-absorbing laminates for use in automobile windshields or other safety glass applications comprising a polycarbonate urethane and a sheet of glass are disclosed. The polyurethane is formed from a cycloaliphatic diisocyanate, a compound containing at least two active hydrogens per molecule and having a molecular weight below 250, and a polycarbonate diol prepared by the reaction of an aliphatic diol and a dialkyl carbonate using a titanium catalyst.CROSS-REFERENCE TO RELATED APPLICATIONSThis application is a continuation-in-part of application Ser. No. 681,012 entitled "Catalyst for Making Polycarbonate Diols for Use in Polycarbonate Urethanes" filed Apr. 28, 1976, now abandoned which in turn is a continuation-in-part of application Ser. No. 385,019 entitled "Transparent, Impact-Resistant Poly(alkylenecarbonate Urethane) Laminates" filed Aug. 2, 1973, now abandoned.

Abstract: A transparent, elastomeric polyurethane which may be cast and cured in place at ambient temperature is prepared by the reaction of a cycloaliphatic diisocyanate with a polyalkylene ether glycol and a crosslinking agent in the presence of butyl stannoic acid catalyst.

Abstract: A homogeneous, colorless liquid reaction mixture of a polycaprolactone polyol, a cycloaliphatic diisocyanate and butyl stannoic acid catalyst is cast and cured at ambient or slightly elevated temperatures to form a transparent, elastomeric polyurethane.

Abstract: Energy-absorbing laminates for use as automobile windshields or other safety glass applications comprising a polycarbonate urethane and a sheet of glass are disclosed. The polyurethane is formed from a cycloaliphatic diisocyanate, a compound containing at least two active hydrogens per molecule and having a molecular weight below 250, and a special polycarbonate diol synthesized from a mixture of linear aliphatic and cycloaliphatic diols.

Abstract: 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 transparent and also hydrolytic and UV light stable as well as being abrasion resistant. The polyurethane is prepared from a cycloaliphatic polyisocyanate, 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.

Abstract: Energy-absorbing interlayers and glass laminates prepared therefrom for use as automobile windshields and other safety glass applications are disclosed. The interlayers are made from a poly(lactone-urethane) in which the molecular weight and structure of the lactone moiety is carefully controlled so as to get optimum energy-absorbing and optical properties.

Abstract: Energy-absorbing interlayers and glass laminates prepared therefrom for use as automobile windshields and other safety glass applications are disclosed. The interlayers are made from a poly(lactone-urethane) in which the molecular weight and structure of the lactone moiety is carefully controlled so as to get optimum energy-absorbing and optical properties.

Abstract: Energy-absorbing interlayers and glass laminates prepared therefrom for use as automobile windshields and other safety glass applications are disclosed. The interlayers are made from a poly(lactone-urethane) in which the molecular weight and structure of the lactone moiety is carefully controlled so as to get optimum energy-absorbing and optical properties.

Abstract: Energy-absorbing laminates for use as automobile windshields or other safety glass applications comprising a polycarbonate urethane and a sheet of glass are disclosed. The polyurethane is formed from a cycloaliphatic diisocyanate, a compound containing at least two active hydrogens per molecule and having a molecular weight below 250, and a special polycarbonate diol synthesized from a mixture of linear aliphatic and cycloaliphatic diols.

Abstract: An improved polyurethane composition useful as an interlayer for safety glass window applications such as bilayer motor vehicle windshields is disclosed. The polyurethane is specially formulated with an organic silane and an organic phosphorus acid to provide a controlled degree of adhesion to glass maintainable under a wide range Of humidity and temperature conditions, particularly higher temperature and humidity conditions, which are especially detrimental to the maintenance of adhesion. The controlled degree of adhesion between the polyurethane and the glass provides improved penetration resistance in glass-polyurethane safety glass laminates.