(Meth)acrylic esters of monoalkoxylated polyols, and production thereof
AssigneeBASF SE
InventorsDieter Hermeling, Thomas Daniel, Mark Elliott, Ulrich Riegel, Frank Dietsche, Reinhold Schwalm
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Abstract
Disclosed are novel (meth)acrylic esters of monoalkoxylated polyols, a process for their preparation and their use for preparing crosslinked swellable hydrogel-forming polymers and crosslinked swellable hydrogel-forming polymers.
Claims15
(Meth)acrylic esters of monoalkoxylated polyols of a general formula (I)
- wherein
- R1 is hydrogen or methyl,
- n is an integer from 2 to 5,
- m is an integer from 1 to 100,
- A is C3 to C20 alk(n+1)yl, and
- B represents
- wherein * identifies positions of attachment.
A swellable hydrogel-forming polymer comprising a copolymerized (meth)acrylic ester of general formula (I)
- wherein
- R1 is hydrogen or methyl,
- n is an integer from 2 to 5,
- m is an integer from 1 to 100,
- A is C3 to C20 alk(n+1)yl, and
- B represents
- wherein * identifies positions of attachment as an internal crosslinker.
A process for preparing crosslinked swellable hydrogel-forming polymers which comprises polymerizing an aqueous mixture comprising a hydrophilic monomer, optionally at least one further monoethylenically unsaturated compound, at least one (meth)acrylic ester of a monoalkoxylated polyol of general formula (I)
- wherein
- R1 is hydrogen or methyl,
- n is an integer from 2 to 5,
- m is an integer from 1 to 100,
- A is C3 to C20 alk(n+1)yl, and
- B represents
- wherein * identifies positions of attachment, at least one free-radical initiator, optionally at least one grafting base, and optionally the hydrogel-forming polymer obtained being postcrosslinked, dried, and brought to a desired particle size.
Dependencies are inferred from the claim text.