Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From ketone or ketene reactant
Patent
1982-08-11
1983-08-09
Lee, Lester L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From ketone or ketene reactant
264137, 264258, 26433112, 26433146, 528226, C08G 7310
Patent
active
043980210
ABSTRACT:
A process for preparing a thermoplastic poly(imidesulfone) is disclosed. This resulting material has thermoplastic properties which are generally associated with polysulfones but not polyimides, and solvent resistance which is generally associated with polyimides but not polysulfones. This system is processable in the 250.degree.-350.degree. C. range for molding, adhesive and laminating applications. This unique thermoplastic poly(imidesulfone) is obtained by incorporating an aromatic sulfone moiety into the backbone of an aromatic linear polyimide by dissolving a quantity of a 3,3',4,4'-benzophenonetetracarboxylic dianhydride (BTDA) in a solution of 3,3'-diaminodiphenylsulfone and bis(2-methoxyethyl)ether, precipitating the reactant product in water, filtering and drying the recovered poly(amide-acid sulfone) and converting it to the poly(imidesulfone) by heating.
REFERENCES:
patent: 3440202 (1969-04-01), Boldebuck et al.
patent: 3506583 (1970-04-01), Boram et al.
patent: 3700649 (1972-10-01), Boram et al.
patent: 3793281 (1974-02-01), Acle, Jr.
patent: 4094862 (1978-06-01), Bell
St. Clair Terry L.
Yamaki David A.
Lee Lester L.
Manning John R.
Nelson Wallace J.
Osborn Howard J.
The United States of America as represented by the Administrator
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