| polyurethanes | A group of thermoplastic or thermosetting polymers containing polyisocyanate; they may be hard and glossy forms; drawn into fibres; elastomeric or rubbery and flexible, or rigid foams. Used as rubber, for coatings, as fibres and foams; also used complexed in other polymers. Synonym: ostamer; spandex; urethane rubber (or elastomer). (12 Dec 1998) |
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