Phenolated naphthalene formaldehyde resin varnish

Details Phenolated naphthalene formaldehyde resin varnish Phenolated naphthalene formaldehyde resin varnish

1981-02-19

1982-09-21

Schofer, Joseph L.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

525472, 528160, 428290, 524542, C08K 505

Patent

active

043506232

ABSTRACT:
The varnish comprises a phenolated naphthalene formaldehyde resin having a molecular weight from 350 to 500 and a combined phenol content from 37 to 54%, a curing agent for the resin, and a lower secondary alcohol as the solvent, the varnish containing about 50% w/w of the resin. The varnish can be used to form glasscloth laminates for the production of printed circuit boards, copper clad laminates and blading for turbines.

REFERENCES:
patent: 2339271 (1944-01-01), Kester
patent: 2825712 (1958-03-01), Witzel
patent: 3993851 (1976-11-01), Robinson et al.

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