Phenol-formaldehyde resin having low concentration of...

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...

Reexamination Certificate

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Details

C524S595000, C524S596000, C528S129000, C528S137000, C528S143000

Reexamination Certificate

active

07741406

ABSTRACT:
A phenol-formaldehyde resin, having a low concentration of tetradimer, making the resin suitable for preparing a binder composition for making non-woven fiber products, such as fiberglass insulation, prepared by reacting phenol and formaldehyde in the presence of a sulfite source.

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PCT Search Report.
PCT International Search Report and Written Opinion of the International Searching Authority for PCT/US2007/077347, mailed Dec. 12, 2007, 8 pages.

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