Process for producing phenol-formaldehyde oligomers of ortho-spe

Details Process for producing phenol-formaldehyde oligomers of ortho-spe Process for producing phenol-formaldehyde oligomers of ortho-spe

1976-12-08

1979-03-27

Morgenstern, Norman

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

C07C 3700, C07C 3720

Patent

active

041467396

ABSTRACT:
The process for producing phenol-formaldehyde oligomers of ortho-specific structure comprises reacting finely-divided crystalline phenol or a mixture of crystalline phenol with crystalline naphthalene, containing from 14 to 58 wt.% of the latter, at a temperature of from 20.degree. to 40.degree. C. with gaseous formaldehyde to give phenolic alcohols. The thus-prepared phenolic alcohols are subjected to polycondensation simultaneously with drying and subsequent heat-treatment of the resulting oligomers of ortho-specific structure.
The process according to the present invention makes it possible to intensify the production of phenol-formaldehyde oligomers of ortho-specific structure. Furthermore, owing to the fact that this process makes it possible to eliminate the use of catalysts and high temperatures, it simplifies technology of the production of phenol-formaldehyde oligomers.
The resulting oligomers (in the case of using mixtures of phenol with naphthalene for the production of phenolic alcohols) are more heat-resistant.

REFERENCES:
patent: 2744882 (1956-05-01), Bender et al.
patent: 2754335 (1956-07-01), Bender et al.
patent: 3330873 (1967-07-01), Godin et al.

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