Imperial Chemical Industries Limited

Kenneth M Jones

Roger I Hancock

Nigel W Hayman

Richard H Still

Raymond Peters

John R Wright

Stanley R Dawber

Tahir H Shah

Neil Tindale

Graeme P Kerr

David Anthony Harrison

Sarah Jennifer Greaves

Modified polyester polymers

Refillable polyethylene terephthalate (PET) bottles are made by injection stretch blow moulding and comprise a threaded neck of transparent amorphous substantially non-oriented PET; a substantially cylindrical body of transparent biaxially oriented amorphous PET from 0.4 to 0.9 mm thick and an area expansion ratio of at least 7; and a base of transparent amorphous substantially non-oriented or partly oriented PET in which the PET is a polyethylene terephthalate polymer randomly modified by replacing from 1 to 6 mole % of the terephthalate units with units of a chain orientation disrupting aromatic dicarboxylic acid, such as iso-phthalic acid, having an Intrinsic Viscosity of at least 0.75. The polymer particularly includes fine metal particles especially of antimony to reduce the reheat, and optionally includes a level of diethylene glycol residues greater than normally present in PET to improve the blowing performance of the polymer.

Refillable bottle of polyethylene terephthalate copolymer and its

Elastomeric block co-polyesters having improved elastic and work recovery properties, a high melting point and are stable at high temperatures, have hard segments comprising at least 50 mole percent of polyethylene terephthalate groups and soft segments comprising at least 40 weight percent of the block copolyester. The soft segments, which have a defined structure, are formed by reacting phenolic compounds with a mixture of ethylene oxide and propylene oxide/butylene oxide.

Elastomeric polymers

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Knaresborough, United Kingdom

Kenneth M Jones