Extended multidimensional ether or ester oligomers

Details Extended multidimensional ether or ester oligomers Extended multidimensional ether or ester oligomers

1995-06-05

1996-05-28

Acquah, Samuel A.

Stock material or miscellaneous articles

Composite

Of polyester

528125, 528126, 528128, 528171, 528174, 528192, 528193, 528210, 528401, 528503, 524 81, 428480, B32B 2736

Patent

active

055210147

ABSTRACT:
Crosslinkable, polyaromatic, polyether or polyester oligomers can have glass transition temperatures above 900.degree. F. while exhibiting desirable toughness for aerospace applications and ease of processing. A plurality (i.e. three or more) of generally linear aryl arms extend outwardly like spokes from a central aromatic hub through ether or ester linkages. Each spoke usually includes electronegative linkages, and is capped with one or two crosslinking functionalities (i.e. unsaturated hydrocarbon sites) which may be thermally or chemically activated to complete the advanced composite during curing. Among other methods, linear and multidimensional polyether oligomers are synthesized using nitrophthalic anhydride or halophthalic anhydride, dialcohols, or polyols, diamines, and suitable end caps.

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patent: 4851501 (1989-07-01), Lubowitz et al.
patent: 5210213 (1993-05-01), Sheppard et al.
Worthy, Chem & Eng'g News (Feb. 22, 1988) pp. 19-21.

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