Method for preparing crosslinker compound
AssigneeLG Chem, Ltd.
InventorsJi Eun Kim, Won Taeck Lim, Yongjin Kim, Gicheul Kim, Wonmun Choi, Ki Hyun Kim
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Abstract
The present disclosure relates to a method for preparing a crosslinker compound in which a crosslinker compound capable of using for the production of a super absorbent polymer can be obtained in a higher yield by a simple manner. The crosslinker compound obtained by the above method can be used as a thermally decomposable crosslinker in the process of producing a super absorbent polymer.
Claims7
A method for preparing a crosslinker compound which is used as an internal crosslinking agent or a thermally decomposable crosslinker for production of a super absorbent polymer, the method comprising the steps of:
- reacting a compound of Chemical Formula 1a with a ketone in the presence of a base to form a compound of Chemical Formula 1,
- hydrogenating the compound of Chemical Formula 1 under a catalyst in the presence of one or more solvents selected from the group consisting of ethyl acetate, methanol, and tetrahydrofuran to form a compound of Chemical Formula 2, wherein the catalyst consists of Pd/C, and is used in an amount of 0.1 to 5 mol % with respect to the compound of Chemical Formula 1, and
- subjecting the compound of Chemical Formula 2 and a compound of Chemical Formula 3 to an esterification reaction to form a compound of Chemical Formula 4:
- wherein, R1′ has a triple bond and is a divalent organic group having 2 to 10 carbon atoms, R1 is a divalent organic group comprising an alkyl group having 2 to 10 carbon atoms, R2 and R3 are each independently an alkyl group having 1 to 5 carbon atoms, R4 is hydrogen or a methyl group, X is halogen, R1″ has a triple bond at the terminal and is a monovalent organic group having 2 to 9 carbon atoms, and R2′ and R3′ are each independently hydrogen or an alkyl group having 1 to 5 carbon atoms.
Dependencies are inferred from the claim text.