Modified phenolic resin from formaldehyde polymer, phenol and oi

Details Modified phenolic resin from formaldehyde polymer, phenol and oi Modified phenolic resin from formaldehyde polymer, phenol and oi

1994-02-03

1995-07-11

Sellers, Robert E.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525472, 525481, 525486, 525488, C08G 810, C08G 820, C08G 208, C08G 210

Patent

active

054322405

ABSTRACT:
A process for producing a modified phenolic resin comprises heating (a) petroleum heavy oil or pitch and (b) a formaldehyde polymer in a molar ratio of formaldehyde:oil or pitch of from 1 to 15:1 in the presence of an acid catalyst, adding phenol in a molar ratio of phenol:oil or pitch of from 0.5 to 5:1 to form a crude modified phenolic resin, and purifying by performing in optional sequence (i) a treatment with an aliphatic or alicyclic hydrocarbon to remove unreacted components and (ii) an extraction with a solvent wherein the catalyst has a solubility of 0.1 or less to remove the catalyst.

REFERENCES:
patent: 3301803 (1967-01-01), Schick et al.
patent: 3398107 (1968-08-01), Rowe, Jr. et al.
patent: 4024094 (1977-05-01), Kurata et al.

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