Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1989-07-31
1990-11-13
Kight, III, John
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525444, 528272, 528297, 528300, 528308, 5283081, 2641761, C08F 2000
Patent
active
049702750
ABSTRACT:
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.
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Charch et al, Textile Research Journal, 29:536-540 (1959).
Dawber Stanley R. K.
Hancock Roger I.
Hayman Nigel W.
Jones Kenneth M.
Peters Raymond
Acquah S. A.
Imperial Chemical Industries plc
Kight III John
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