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US 2022/0185762 A1Published application
Method for Preparation of Acetoacetylated Polyols
AssigneeLonza Solutions AG
InventorsMasaki Nakajima, Anja Bierstedt, Leo Schmid, Maximilian Kuehnle, Ulrich Mayerhoeffer, Ellen Klegraf
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Abstract
The invention discloses a method for preparation of an acetoacetylated polyol by reaction of a polyol with deketene in the presence of a base and in the absence of a solvent.
Claims9
A method for preparation of an acetoacetylated polyol, the method comprises a reaction REAC1, wherein a polyol is reacted with diketene;
- REAC1 is done in the presence of a base BAS1;
- BAS 1 is DABCO or DMAP;
- REAC1 is done in the absence of a solvent.
The method according to wherein
- the polyol is selected from the group consisting of ethylene glycol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, tricyclo[5.2.1.02,6]decane-4,8-dimethanol, 1,4-cyclohexanedimethanol and trimethylolpropane, and mixtures thereof.
The method according to wherein
- in REAC1 the diketene is charged to a mixture of polyol with BAS1.
Dependencies are inferred from the claim text.