Thermally reversible superabsorbent polymers

Details Thermally reversible superabsorbent polymers Thermally reversible superabsorbent polymers

1989-04-21

1991-09-10

Nutter, Nathan M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524 15, 524 16, 524 17, 524335, 528 45, 528 65, 528 76, C08J 8900, C08K 1100, C08G 1881, C08G 1810

Patent

active

050474561

ABSTRACT:
The invention provides a thermally reversible superabsorbent polymer adapted for use in melt processes, the polymer having a thermally reversible bond which is adapted to evanesce at an elevated temperature and revert to a thermally reversible bond upon cooling to ambient temperature so that the polymer is adapted, upon being heated to that elevated temperature, to dissociate into melt processable polymer fragments and, upon being cooled from that elevated temperature to ambient temperature, to re-associate. Also disclosed are superabsorbent polymer fibers and sheets formed from the thermally reversible superabsorbent polymer. The polymer fibers may be meltblown fibers which may be formed into a coherent nonwoven web. The meltblown fibers may include microfibers. The meltblown web may also include at least one type of secondary fiber, particulates or a mixture of fibers and particulates.

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