Process of preparing fibrous sheet from high-ortho phenolic reso

Details Process of preparing fibrous sheet from high-ortho phenolic reso Process of preparing fibrous sheet from high-ortho phenolic reso

1972-02-17

1977-05-10

Schain, Howard E.

Coating processes

With post-treatment of coating or coating material

Heating or drying

260 293, 427381, 428290, C09J 314, C09J 506

Patent

active

040229424

ABSTRACT:
The invention relates to high ortho phenolic resole resins and varnishes. The phenolic resole resins are produced by reacting under acidic conditions formaldehyde with a phenol in the presence of a divalent electropositive metal ion. The resulting novel resole is then dissolved in organic solvent. The solutions are useful as varnishes in the manufacture of impregnated sheets, laminates and other reinforced plastics.

REFERENCES:
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patent: 3332911 (1967-07-01), Huck
patent: 3476707 (1969-11-01), Culbertson et al.
patent: 3485797 (1969-12-01), Robins
patent: 3526677 (1970-09-01), Dahms et al.
patent: 3620902 (1971-11-01), Anderson et al.
patent: 3637429 (1972-01-01), Anderson et al.
patent: 3691121 (1972-09-01), Anderson et al.
Whitehouse, Phenolic Resins pp. 7-9.
J. Appl. Chem., 7, 1957, pp. 676-699, Fraser et al.

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