Process for producing a phenolic foam

Details Process for producing a phenolic foam Process for producing a phenolic foam

2006-05-22

2009-10-20

Gulakowski, Randy (Department: 1796)

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

Synthetic resins

Cellular products or processes of preparing a cellular...

C521S050000

Reexamination Certificate

active

07605189

ABSTRACT:
A process for producing a strong, lightweight, pH-neutral phenolic foam by providing a novelac resin and a resole resin with a solid-state blowing agent activated at a specific time in a melt for the formation of a foam.

REFERENCES:
patent: 3207652 (1965-09-01), Shannon
patent: 3792141 (1974-02-01), Offutt
patent: 3814778 (1974-06-01), Hosoda et al.
patent: 2002/0198268 (2002-12-01), Harris et al.
patent: 1098029 (1965-09-01), None
patent: 6502004 (1965-02-01), None

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