Sheppard Clyde H. (Bellevue WA) Lubowitz Hyman R. (Rolling Hills Estates CA)
출원인 / 주소
The Boeing Company (Seattle WA 02)
인용정보
피인용 횟수 :
13인용 특허 :
16
초록▼
Polyetherimide oligomers having crosslinking end cap moieties which provide improved solvent-resistance to cured composites are generally represented by the formula: [Figure] wherein X=-O-or -S-; [Figure] n=1 or 2; [Figure] [Figure] [Figure] E=allyl or methallyl; R=a trivalent C(6-13) aromatic organ
Polyetherimide oligomers having crosslinking end cap moieties which provide improved solvent-resistance to cured composites are generally represented by the formula: [Figure] wherein X=-O-or -S-; [Figure] n=1 or 2; [Figure] [Figure] [Figure] E=allyl or methallyl; R=a trivalent C(6-13) aromatic organic radical; R1=any of lower alkyl, lower alkoxy, aryl, or substituted aryl; R′=a divalent C(6-30) aromatic organic radical; j=0, 1 or 2; and G=-CH2-, -O-, -S-, or -SO2- Blends generally comprise substantially equimolar amounts of the oligomers and a comparable, compatible, noncrosslinking, etherimide polymer of substantially the same backbone. The crosslinkable oligomers are made by reacting substituted phthalic anhydrides with hydroxyaryl amines and suitable crosslinking end cap reactants, or by self-condensation of phthalimide salts followed by capping the polymers. Related polyetherimides of the present invention can be prepared by the condensation of nitrophthalic anhydride, diamines, dialcohols (dihydricphenols), and phenolic, crosslinking end caps (A-OH), or the condensation of bis(phenates) or dialcohols (bisphenols), diamines, nitrophthalic anhydride, and amine-terminated end caps (A-NH2) or nitro-terminated end caps (A-NO2). The oligomers and blends can be prepregged, and can be cured to form advanced composites having aerospace applications.
대표청구항▼
A polyetherimide blend, comprising an oligomer which is the product of the process of reacting: [Figure] (I) [Figure] (II) [Figure] (III) and H2NR′XH (IV) in about the stoichiometric ratio of I:II:III:IV=1:1:m:(m=1), wherein m is an integer greater than or equal to one, the oligomer having the gener
A polyetherimide blend, comprising an oligomer which is the product of the process of reacting: [Figure] (I) [Figure] (II) [Figure] (III) and H2NR′XH (IV) in about the stoichiometric ratio of I:II:III:IV=1:1:m:(m=1), wherein m is an integer greater than or equal to one, the oligomer having the general formula: [Figure] wherein X=-O-or -S-; [Figure] n=1 or 2 [Figure] [Figure] [Figure] E=allyl or methallyl; Y=halo- or nitro-; R=a trivalent C(6-13) aromatic organic radical; R1=any of lower alkyl, lower alkoxy, aryl, or halo- or hydroxyl- substituted aryl; R′=a divalent C(6-30) aromatic organic radical; J=0, 1, or 2; and G=-CH2-, -O-, -S-, or -SO2-, and a polymer having a compatible backbone absent the crosslinking end cap radicals (A) of the oligomer, the polymer including repeating units of the formula: [Figure] wherein X, R and R′are as defined above for the oligomer.
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이 특허에 인용된 특허 (16)
Mercer Frank (Belmont CA), Aromatic polymer compositions.
Robeson Lloyd M. (Whitehouse Station NJ) Matzner Markus (Edison NJ) Maresca Louis M. (Belle Mead NJ), Blends of poly(aryl ether) resins and polyetherimide resins.
Lubowitz Hyman R. (Rolling Hills Estates CA) Sheppard Clyde H. (Bellevue WA) Stephenson Ronald R. (Kirkland WA), Method of making multidimensional polyesters.
Sheppard Clyde H. (Boeing Aerospace Company ; P.O. Box 399 ; M/S 73-09 Seattle WA 98124-2499) Lubowitz Hyman R. (26 Coral Tree Ln. Rolling Hills Estates CA 90274), Methods for making liquid molding compounds using diamines and dicyanates.
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