Imperial Chemical Industries Limited

William Derek Robinson

Neil Hunter Ray

Cyril John Lewis

Timothy Alan Remmington

Quenching molten polymeric films, especially polyester films, on casting surfaces by means of a combination of electrostatic and suction pinning.

Polymeric film production

An optical article, for example, a lens, window or mirror, at least part of the surface of which, and preferably the whole of which, is an inorganic oxide glass having a P.sub.2 O.sub.5 content of at least 52 mole %, and preferably 55 to 68.5 mole %, an alkaline earth content of 2.7 to 20 mole %, and a transformation temperature of not greater than 300.degree. C, the glass optionally containing B.sub.2 O.sub.3 and at least one alkali metal oxide.

Anti-misting inorganic oxide glass compositions

Phosphate glasses containing minor amounts of the oxides of chromium, molybdenum and tungsten (Group VIb) have improved water resistance and low softening points. Suitable compositions are within the range (moles percent)

Glass compositions

Inorganic oxide glasses having compositions within the range (in moles percent) B.sub.2 O.sub.3 1.2-3.5, P.sub.2 O.sub.5 50-72, PbO 0-30, transition metal oxides 0-5, the remainder being oxides selected from alkali metal oxides, alkaline earths and zinc oxide.

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Runcorn, United Kingdom

William Derek Robinson