Poly(dialkylaminoalkyl (meth)acrylamide)-based superabsorbent gels
AssigneeAMCOL International Corporation
InventorsThomas W. Beihoffer, Michael A. Mitchell, Leticia L. Trzupek
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Abstract
Poly(dialkylaminoalkyl (meth)acrylamide)-based superabsorbent gels are disclosed. The superabsorbent gels either comprise a mixture of a poly(dialkylaminoalkyl (meth) acrylamide) polymer and an acidic water-absorbing polymer, like polyacrylic acid, or comprise a salt of a poly(dialkylaminoalkyl (meth)acrylamide) polymer. An improved method of preparing an N-(dialkylaminoalkyl) (meth)acrylamide monomer also is disclosed.
Claims19
A solid superabsorbent material comprising a mixture of
- (a) discrete particles of a lightly crosslinked poly(dialkylaminoalkyl (meth)acrylamide), and
- (b) discrete particles of an acidic water-absorbing resin.
A solid superabsorbent material comprising a mixture of
- (a) discrete particles of a lightly crosslinked polymer prepared from an acrylic acid ester monomer having the formula ##STR10## wherein R.sub.1 and R.sub.2, independently, are selected from the group consisting of hydrogen and methyl, Y is a divalent organic radical having 1 to 8 carbon atoms, and R.sub.3 and R.sub.4, independently, are alkyl radicals having 1 to 4 carbon atoms, and
- (b) discrete particles of an acidic water-absorbing resin.
A solid superabsorbent material comprising a mixture of
- (a) particles of a lightly crosslinked poly(diakylaminoalkyl (meth)acrylamide), and
- (b) particles of an acidic water-absorbing resin,
- wherein the poly(dialkylaminoalkyl (meth)acrylamide) is surface crosslinked using a surface crosslinking agent comprising a dihaloalkane containing 2 to 10 carbon atoms.
Dependencies are inferred from the claim text.