Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1978-01-20
1979-01-23
Lee, Lester L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
C08G 7314
Patent
active
041360850
ABSTRACT:
An improved process for preparing amide-imide polymers which at a percent solids of 98.+-.2% have a melt flow in the range of about 1 to about 200 g/10 min. by the addition of an effective amount of trimellitic acid anhydride to 4-trimellitoyl anhydride halide (4-TMAH) and one or more aromatic diamines during reaction in an organic solvent.
REFERENCES:
patent: 3920612 (1975-11-01), Stephens
patent: 4048144 (1977-09-01), Stephens
Gilkes Arthur G.
Hensley Stephen L.
Lee Lester L.
McClain William T.
Standard Oil Company (Indiana)
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