Formaldehyde → Resorcinol-formaldehyde resin

In a four-necked flask equipped with a reflux condenser and a thermometer were placed 110 g (1.0 mole) of resorcin and 44.5 g (0.55 mole) of 37% formalin, and the resulting mixture was subjected to reaction at 70° C. for five hours. The reflux condenser was then replaced by a fractionator, and the pressure in the flask was reduced to 25 mmHg, after which the temperature was elevated to 150° C., at which temperature the contents of the flask were concentrated for three hours to obtain a resorcin formaldehyde resin [T].

1. customIn a four-necked flask equipped with a reflux condenser
2. customthe resulting mixture was subjected to reaction at 70° C. for five hours
3. customwas elevated to 150° C., at which temperature
4. concentrationwere concentrated for three hours

ORD record

ord-fabe99119f714e16a297ecd700467720

Source dataset

uspto-grants-1998_02

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05717053