Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1977-05-09
1979-01-09
Lee, Lester L.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
260 291R, 260 304N, 260 322, 260 326N, 260 328N, 428435, 260823, 528183, C08G 7312
Patent
active
041337921
ABSTRACT:
The applicants have provided novel heat curable resin compositions consisting predominately of a chemical compound having the structure of Formula A shown in FIG. 1 of the drawings. A desirable characteristic of the novel resin compositions of the invention is that they have a high solubility in selected solvents such as N-methyl-2-pyrrolidone (NMP) so that resin solutions containing at least 30 weight % resin solids at ambient temperature can be prepared. Glass fabric laminates having a high loading of resin are easily prepared from such solutions. Typically, high solids solutions of the compounds of Formula A are prepared by a three-step process. A solution containing at least 17 weight % of 3,3',4,4'-benzophenonetetracarboxylic acid dianhydride (BTDA) in N-methyl-2-pyrrolidone (NMP) is prepared by heating the BTDA and NMP to a temperature of at least 150.degree. C with stirring. The solution then is cooled to a temperature of about 60.degree. C and substantially 0.5 molar portion (based on 1 molar portion of BTDA) of a bis(aminophenoxy) benzene (APB) is added thereto to prepare a high solids solution of a compound having the structure of Formula B shown in FIG. 1. Subsequently, while maintaining this solution at a temperature of about 60.degree. C, substantially 1.0 molar portion of a 3-aminophenylacetylene (APA) is added thereto to prepare a high solids solution of a compound having the structure of Formula A.
REFERENCES:
patent: 3890274 (1975-02-01), D'Alelio
patent: 3897395 (1975-07-01), D'Alelio
patent: 3998786 (1976-12-01), D'Alelio
Antonoplos Patricia A.
Heilman William J.
Gulf Oil Corporation
Kelly Richard L.
Lee Lester L.
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