Crosslinking agent based on linear hydroxypolyallyl ether

Details Crosslinking agent based on linear hydroxypolyallyl ether Crosslinking agent based on linear hydroxypolyallyl ether

2005-01-03

2010-06-08

Price, Elvis O (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

C568S679000, C568S678000, C568S673000, C568S675000, C568S688000, C568S689000, C252S182180, C252S182230, C252S182240, C252S182270, C526S317100, C526S318000, C526S320000, C526S321000

Reexamination Certificate

active

07732646

ABSTRACT:
An allyl type crosslinking agent for use in production of a super water-absorbent polymer comprising a polymerizable compound having a carbon-carbon double bond or a salt thereof. The crosslinking agent comprises a linear hydroxypolyallyl ether having at least one hydroxyl group and at least two allyl groups obtained by allyletherification of hydroxyl groups in a linear polyol compound selected from the group consisting of erythritol, xylitol and sorbitol. This allyl type crosslinking agent is highly soluble in an aqueous solvent, and can give an excellent super water-absorbent polymer, which cannot be obtained in the prior arts, having high levels of both of water absorptivity under atmospheric pressure and water absorptivity under pressurized conditions.

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Smith, P.B., et al. “Allyl Endcapped Polyethylene Oxide Crosslinkers and Their Use in Superabsorbents”, J. Polym. Sci. A: Polym. Chem., vol. 35 (1997), pp. 799-806.

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