Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1986-09-17
1987-09-29
Nielsen, Earl
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
528 87, 528499, C08G 5906, C08G 5908
Patent
active
046969829
ABSTRACT:
A method for purification of phenolic epoxy novolac or phenolic derivative epoxy resin intermediates is disclosed. At the time of manufacture, the epoxy resin is a flowing stream with a solvent and with impurities, typically being dispersed residual salt ions, particles of the catalyst used in the manufacturing process, and solidified polymer. The epoxy resin is mixed with water dispersed therethrough in droplet form. Then, the epoxy resin is flowed through an electrostatic coalescer means. The water droplets are coalesced and form a water phase in the bottom of the coalescing means, thereby picking up substantially all the impurities. As desired, two or more electrostatic coalescing means can be cascaded to obtain a desired degree of purification.
REFERENCES:
patent: 3296157 (1967-01-01), Brojer et al.
patent: 4447598 (1984-05-01), Caskey et al.
patent: 4511710 (1985-04-01), Wang et al.
patent: 4585838 (1986-04-01), Wang et al.
patent: 4617357 (1986-10-01), Pallie et al.
Nielsen Earl
The Dow Chemical Company
LandOfFree
Process for removing residual salts from epoxy novolacs does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for removing residual salts from epoxy novolacs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for removing residual salts from epoxy novolacs will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1589773