Trimethylolpropane esters are useful for the production of cross-linked hydrogels, useful for the production of hygiene articles, packaging materials and non-wovens

摘要

Trimethylolpropane esters are new. Trimethylolpropane esters are of formula (1). (1) AO : OCH2CH2, OCH2CH(CH3), OCH(CH3)CH2, n1-n3 : 4-6; n1+n2+n3+n4 : 14-16; m1-m3 : 1-3; m1+m2+m3 : 4-6; R1-R3 : 4-6 Independent claims are included for: (1) a process for the production of esters of formula (1) by reaction of alkoxylated trimethylolpropane with (meth)acrylic acid in the presence of at least one esterification catalyst (C) and at least one polymerization inhibitor (D) as well as optionally a solvent (E) that forms an azeotrope with water; optionally removal of at least a portion of the water from the reaction mixture during or after the water from the reaction, optiionally neutralizing the reaction mixture; optionally removing the solvent if present by distillation and/or stripping with an inert gas; (2) across-linked hydrogel prepared by polymerization of an ester of formula (1) with (meth)acrylic acid with optionally additional monoethylenicaly unsaturated compounds (N) as well as optionally at least a further copolymerizable hydrophilic monomer (M) in the presence of at least one radicatl initiator (K) and optionally a graft base (L); optionally cross-linking of the resulting reaction mixture; drying of the reaction mixture and optionally grinding the reaction mixture; (3) a mixture comprising 0.1-40 wt.% of a ester of formula (1) and (meth)acrylic acid, 0.5-99.9 wt.% of a hydrophilic monomer (M), 0-10 wt.% of an esterification catalyst (C), 0-5 wt.% polymerization inhibitor (D) and 0-10 wt.% sovlent (E).