Einzeltreffer — DigiBib

The present invention relates to homogeneous alumoxane-LCT-epoxy polymers and methods for making the same. The homogeneous alumoxane-LCT-epoxy polymers comprise alumoxane-containing sub-structures evenly dispersed and essentially completely co-reacted with the LCT-epoxy sub-structures. The alumoxane sub-structures are organically bonded to the LCT-epoxy sub-structures. This produces homogeneous alumoxane-LCT-epoxy polymers that are substantially free of particle wetting and micro-void formation, with improved thermal conductivity properties without compromising on other desired structural integrities.

Titel:	Homogeneous alumoxane-LCT-epoxy polymers and methods for making the same
Autor/in / Beteiligte Person:	Smith, James D.B.
Link:	View record in USPTO Patent Applications (Volltext)
Veröffentlichung:	2005
Medientyp:	Patent
Sonstiges:	Nachgewiesen in: USPTO Patent Applications Sprachen: English Document Number: 20050009958 Publication Date: January 13, 2005 Appl. No: 10/618111 Application Filed: July 11, 2003 Claim: 1. A method of making homogeneous alumoxane-LCT-epoxy polymers with a dielectric strength of at least 1.2 kV/mil comprising: mixing at least one LCT-epoxy resin with at least one boehmite material, under sufficient conditions to form a uniform dispersion and an essentially complete co-reactivity of said at least one boehmite material with said at least one LCT-epoxy resin, wherein a mixture is formed; and curing said mixture to produce said homogeneous alumoxane-LCT-epoxy polymers; wherein the amount of said at least one boehmite material to said at least one LCT-epoxy resin comprises a ratio of between 3:17 and 13:7 by weight. Claim: 2. The method of claim 1, wherein said at least one boehmite material comprises carboxylate-alumoxane. Claim: 3. The method of claim 2, wherein said carboxylate-alumoxane is 4-hydroxybenoate-alumoxane. Claim: 4. The method of claim 1, wherein the alumoxane portions of said homogeneous alumoxane-LCT-epoxy polymers is 20-50% by weight. Claim: 5. The method of claim 1, wherein mixing said at least one LCT-epoxy resin with said at least one boehmite material comprises first pre-heating said at least one LCT-epoxy resin until said at least one LCT-epoxy resin is clear. Claim: 6. The method of claim 1, wherein mixing said at least one LCT-epoxy resin and said at least one boehmite material further comprises warming until said mixture is clear. Claim: 7. The method of claim 1, further comprising mixing at least one anhydriding agent with at least one of said at least one LCT-epoxy resin and said boehmite material, wherein said homogeneous alumoxane-LCT-epoxy polymers are a homogeneous alumoxane-LCT-epoxy-anhydride polymers. Claim: 8. The method of claim 7, wherein said anhydriding agent is taken from the group consisting of 1-methylhexahydrophthalic anhydride and 1-methyltetrahydrophthalic anhydride. Claim: 9. The method of claim 7, wherein said anhydriding agent is approximately 25-45% by weight of said homogeneous alumoxane-LCT-epoxy-anhydride polymers. Claim: 10. The method of claim 1, wherein curing of said mixture comprises adding one of the group consisting of zinc naphthenate and chromium acetylacetonate. Claim: 11. The method of claim 1, wherein said mixture is added to an electrical insulator as a coating before curing. Claim: 12. A method of making homogeneous alumoxane-LCT-epoxy polymers with a dielectric strength of at least 1.2 kV/mil coated on at least one electrical insulator comprising the steps of: mixing at least one LCT-epoxy resin with at least one boehmite material, wherein a mixture is formed; warming until said mixture is clear and under sufficient conditions to form a uniform dispersion and an essentially complete co-reactivity of said at least one boehmite material with said at least one LCT-epoxy resin; impregnating said mixture onto said electrical insulator; and curing said mixture to produce said homogeneous alumoxane-LCT-epoxy polymers; wherein the amount of said at least one boehmite material to said at least one LCT-epoxy resin comprises a ratio of between 3:17 and 13:7 by weight. Claim: 13. The method of making homogeneous alumoxane-LCT-epoxy polymers coated on at least one electrical insulator as in claim 12, further comprising adding to said at least one LCT-epoxy resin at least one anhydriding agent prior to adding said boehmite material, wherein said homogeneous alumoxane-LCT-epoxy polymers are homogeneous alumoxane-LCT-epoxy-anhydride polymers. Claim: 14. The method of making homogeneous alumoxane-LCT-epoxy polymers coated on at least one electrical insulator as in claim 12, wherein said electrical insulator is a mica/glass insulating tape. Claim: 15. Homogeneous alumoxane-LCT-epoxy polymers comprising: at least one alumoxane containing sub-structure; at least one LCT-epoxy sub-structure; thermal conductivity in the transverse direction of at least 0.50 W/mK and in the thickness direction of at least 0.99 W/mK in an environment of 25° C.; and dielectric strength of at least 1.2 kV/mil; wherein said alumoxane substructure is organically bonded to said LCT-epoxy substructure; wherein approximately 15-65% by weight of said homogeneous alumoxane-LCT-epoxy polymers is said alumoxane sub-structure; and wherein said homogeneous alumoxane-LCT-epoxy polymers are substantially free of particle wetting and micro-void formation. Claim: 16. The homogeneous alumoxane-LCT-epoxy polymers of claim 15, wherein said alumoxane sub-structure comprises carboxylate-alumoxane. Claim: 17. The homogeneous alumoxane-LCT-epoxy polymers of claim 16, wherein said carboxylate-alumoxane is 4-hydroxybenoate-alumoxane Claim: 18. The homogeneous alumoxane-LCT-epoxy polymers of claim 15, wherein said homogeneous alumoxane-LCT-epoxy polymers contain at least one anhydride, and wherein said anhydride portion is approximately 25-45% by weight of said homogeneous alumoxane-LCT-epoxy polymers. Claim: 19. The homogeneous alumoxane-LCT-epoxy polymers of claim 15, wherein said homogeneous alumoxane-LCT-epoxy polymers are integrally formed with at least one electrical insulator. Current U.S. Class: 523457/000

Klicken Sie ein Format an und speichern Sie dann die Daten oder geben Sie eine Empfänger-Adresse ein und lassen Sie sich per Email zusenden.

BibTeX Citavi, JabRef, u.a.
(Literaturverwaltung)

PDF kein Volltext!
(Merkzettel, Notizen)

RIS Endnote, Citavi u.a.
(Literaturverwaltung)

MODS
(XML zur Weiterverarbeitung)

oder

Wählen Sie das für Sie passende Zitationsformat und kopieren Sie es dann in die Zwischenablage, lassen es sich per Mail zusenden oder speichern es als PDF-Datei.

Gewünschter Zitations-Stil:

oder

Bitte prüfen Sie, ob die Zitation formal korrekt ist, bevor Sie sie in einer Arbeit verwenden. Benutzen Sie gegebenenfalls den "Exportieren"-Dialog, wenn Sie ein Literaturverwaltungsprogramm verwenden und die Zitat-Angaben selbst formatieren wollen.

Homogeneous alumoxane-LCT-epoxy polymers and methods for making the same