Method for preparation of acetoacetylated polyols
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.
1. 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;
BAS1 is DABCO or DMAP;
REAC1 is done in the absence of a solvent.
2. The method according to claim 1 , wherein
only the three components polyol, BAS1 and diketene are used for and are charged for REAC1, and no other compounds are used for or are charged for or are present in REAL 1.
3. The method according to claim 1 , wherein
the polyol is a compound of formula (I);
R1(OH) m1 (I)
R1 is selected from the group consisting of C 1-12 alkane, C 1-12 alkene, C 1-12 alkyne, C 5-12 cycloalkane, C 6-12 cycloalkene, C 8-12 di- and tricycloalkane, C 8-12 di- and tricycloalkene, and mixtures thereof;
wherein 1, 2 or 3 of any of the CH 2 group can be exchanged for O;
m1 is 2, 3, 4, 5 or 6.
4. The method according to claim 3 , wherein
R1 is selected from the group consisting of C 1-12 alkane, C 1-12 alkene, Ci-12 alkyne, C 5-12 cycloalkane, C 8-12 di- and tricycloalkane, and mixtures thereof.
5. The method according to claim 1 , wherein
the polyol is selected from the group consisting of di- and trimethylene glycol, ethylene glycol, di-, tri- and tetraethylene glycol, 1,2- and 1,3-propanediol, di- and tripropylene glycol, 1,2-, 1,3-, 1,4-, 2,3-, 2,4- and 3,4-butanediol, pentanediol, pentylglycol, neopentyl glycol, glycerol, isosorbide, hexanediol, hexylene glycol, trimethylpentanediol, tricyclo[5.2.1.0 2,6 ]decane-4,8-dimethanol, 1,2-, 1,3- and 1,4-cyclohexanedimethanol, 2,4-butyne-1,4-diol, 2,5-dimethyl-3-hexyne-2,5-diol, trimethylolethane, trimethylolpropane, sorbitol, pentaerythritol, and mixtures thereof.
6. The method according to claim 1 , wherein
the polyol is selected from the group consisting of ethylene glycol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, tricyclo[5.2.1.0 2,6 ]decane-4,8-dimethanol, 1,4-cyclohexanedimethanol and trimethylolpropane, and mixtures thereof.
7. The method according to claim 1 , wherein
the polyol is selected from ethylene glycol and trimethylolpropane, and a mixture thereof.
8. The method according to claim 1 , wherein
BAS1 is DABCO.
9. The method according to claim 1 , wherein
in REAC1 the diketene is charged to a mixture of polyol with BAS1.