Participants
| Role | Name | HCID | Charge |
|---|
| Reactant | O-Cresol | HCID 335 | — |
| Reactant | M-Cresol | HCID 342 | — |
| Reactant | Formaldehyde | HCID 712 | — |
| Reactant | Maleic Anhydride | HCID 7923 | — |
| Reactant | 3,5-Dimethylphenol | HCID 7948 | — |
| Solvent | Water | HCID 962 | — |
| Solvent | Cyclohexanone | HCID 7967 | — |
| Solvent | Diglyme | HCID 8150 | — |
| Product | HCID 86747351 | HCID 86747351 | — |
Reaction Steps
Into a 500 ml. three necked flask were charged 108 grams (1.0 mole) meta-cresol, 40.26 grams (0.33 mole) 3,5-dimethyl phenol, 3.0 grams maleic anhydride and 70 ml. diglyme. The cresol mixture is heated under stirring and nitrogen flow to 98 degree C. At this temperature 83.0 ml. (0.77 mole) 37% formaldehyde solution is slowly added by dropping funnel during a period of one hour. The condensation reaction is allowed to continue for four hours at 98° C. After the condensation water and solvent are distilled off first at room atmospheric pressure till 200° C. At this stage, 30 mm pressure was applied to distill residual solvent and cresol mixture at a maximum temperature up to 220° C. The vacuum at 220° C. is for one hour before the liquified resin is poured into a cooling tray. The resin obtained has a viscosity of 13.8. (7.0% solution in Cyclohexanone.)
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|
| Patent number | US05260162 |
|---|
| Source dataset | uspto-grants-1993_11 |
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| ORD ID | ord-4e7a9e98e2774b36915eadd6e83613df |
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| Source note | uspto-grants-1993_11 |
|---|
