Gannett Thomas P. (Wilmington DE) Gibbs Hugh H. (Wilmington DE)
출원인 / 주소
E. I. Du Pont de Nemours and Company (Wilmington DE 02)
인용정보
피인용 횟수 :
26인용 특허 :
7
초록▼
Melt-fusible polyimides based on pyromellitic dianhydride and at least one defined aromatic diamine are useful in making low-void composites and thermoplastic tapes, which can be fabricated into articles such as, for example, aircraft and autobody panels, printed circuit boards, etc. Some of these p
Melt-fusible polyimides based on pyromellitic dianhydride and at least one defined aromatic diamine are useful in making low-void composites and thermoplastic tapes, which can be fabricated into articles such as, for example, aircraft and autobody panels, printed circuit boards, etc. Some of these polyimides are melt-processible and can be fabricated by conventional procedures such as extrusion and injection molding.
대표청구항▼
A substantially void-free composite structure consisting essentially of a fibrous substrate impregnated with a melt-fusible polyimide containing up to about 10% of end-capped amino or anhydride groups and consisting essentially of the following repeating units: [Figure] where Q in each repeating uni
A substantially void-free composite structure consisting essentially of a fibrous substrate impregnated with a melt-fusible polyimide containing up to about 10% of end-capped amino or anhydride groups and consisting essentially of the following repeating units: [Figure] where Q in each repeating unit, independently of any other unit, is a divalent organic radical selected from the following: [Figure] (a) where G is O or S; and Z is hydrogen or phenyl; and, when Z is hydrogen, both terminal covalent bonds are either in the ortho or meta position with respect to G; while, when Z is phenyl, both terminal covalent bonds are in ortho, meta, or para position with respect to G; [Figure] (b) where G is O or S; and R is phenyl, biphenyl, or naphthyl; and [Figure] (c) where G is O or S. A melt-fusible polyimide consisting essentially of the following repeating units [Figure] where Q in each repeating unit, independently of any other unit, is a divalent organic radical selected from the following: [Figure] (a) where G is O or S, and Z is hydrogen or phenyl; and, when Z is hydrogen, both terminal covalent bonds are either in the ortho or meta position with respect to G; while, when Z is phenyl, both terminal covalent bonds are in ortho, meta, or para position with respect to G; [Figure] (b) where G is O or S; and R is phenyl, biphenyl, or naphthyl; and [Figure] (c) where G is O or S and both terminal covalent bonds are in the ortho or meta position with respect to G. A solution in a polar solvent of a pyromellitic diester diacid and of a diamine, either component being present in a 0-10% molar excess, the diamine being either a single species or more than one species selected from the following classes (a) through (c): [Figure] (a) where G is O or S, and Z is hydrogen or phenyl; and, when Z is hydrogen, both terminal amine groups are either in the ortho or meta position with respect to G; while, when Z is phenyl, both terminal amine groups are in ortho, meta, or para position with respect to G; [Figure] (b) where G is O or S; and R is phenyl, biphenyl, or naphthyl; and [Figure] (c) where G is O or S, and both amine groups are in the ortho or meta position with respect to G. A diamine selected from the class consisting of: 1,4-bis(4-aminophenoxy)-2-phenylbenzene; 2-(2,4-diaminophenoxy)biphenyl; and 4-(2,4-diaminophenoxy)biphenyl.
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이 특허에 인용된 특허 (7)
Darms Roland (Therwil CHX), Aromatic diamines and their use as polycondensation components for the manufacture of polyamide, polyamide-imide and pol.
Villaescusa Frank W. (Colorado Springs CO) Breland John G. (Colorado Springs CO) Arnold Fred E. (Centerville OH), Aryl ether compounds and their synthesis.
Fay Ralph Michael ; Wulliman Rebecca Sue ; Stacy James Walter ; Townsend Jeffrey Canon ; Volenec Steven N., Burn through resistant systems for transportation, especially aircraft.
Kundinger Ernst F. (Neustadt DEX) Klimesch Erich (Erlenbach DEX) Zengel Hans G. (Kleinwallstadt CT DEX) Lasher Jeffrey D. (Tolland CT), Flexible multilayer polyimide laminates.
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.
Bockrath Ronald E. (Oswego IL) Cole Bill W. (Naperville IL), Polyamide-imide compositions from bisphenoxyphenyl diamine tricarboxylic anhydride and tetracarboxylic dianhydride.
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