Water → Formaldehyde
Reaction equation
[CH:1]1[CH:6]=[CH:5][C:4](/[CH:7]=[CH:8]/[CH2:9][O:10][C@@H]2O[C@H](CO)[C@@H](O)[C@H](O)[C@H]2O)=[CH:3][CH:2]=1.[CH2:22]1[CH:26]2[CH:27]3C=CC([CH:25]2[CH:24]=[CH:23]1)C3.[OH2:32]>>[CH3:22][CH2:23][CH2:24][CH2:25][CH2:26][CH2:27][CH2:9][CH2:8][CH2:7][C:4]1[CH:5]=[CH:6][C:1]([OH:32])=[CH:2][CH:3]=1.[CH2:9]=[O:10]Participants
Conditions
- Temperature
- 160 °C
Procedure
300 g of rosin and 700 g of 75% strength dicyclopentadiene are heated to 260° C. in a 5 liter pressure apparatus. After five hours, the stirred melt is cooled to 160° C. and the apparatus is brought to atmospheric pressure. 710 g of a water-soluble resol obtained from 1,860 g of nonylphenol and 510 g of formaldehyde (processing viscosity 250 mPa.s, residue on drying 68% after heating for one hour at 135° C.) are metered into this melt. With constant removal of water, the mixture is heated to 250° C. until a 50% strength toluene solution reaches a viscosity of 100 mPa.s/23° C. 12.5 g of 3l-aminopropylimidazole are then added, stirring is continued for 1 hour and volatile components are distilled off in vacuo at 50 mbar. 2,100 g of a mineral oil having a boiling point of 240°-270° C. and an aniline point of 72° C. are then allowed to run in. After cooling, the varnish has a viscosity of 10 dPa.s/23° C. It can be used for flusing water-moist pigment cakes and for dispersing pigments.
Sources & evidence
- ORD record
- ord-ee2ada04058d415fbf6c914dcb5b2681
- Source dataset
- uspto-grants-1994_11
- Patent number
- US05362818
Reaction notes
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