Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From heavy metal or aluminum reactant having at least one...
Patent
1994-07-13
1995-10-03
Bleutge, John C.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From heavy metal or aluminum reactant having at least one...
528395, 525389, 423412, 556176, C08G 7900
Patent
active
054553229
ABSTRACT:
This invention provides a process for manufacturing aluminum-nitrogen polymers (i.e., polymers having a backbone of alternating aluminum and nitrogen atoms) in which portions of the polymer have an organic substituent on each aluminum and nitrogen atom. The novel polymers so produced are useful for making green shapes pyrolyzable to AlN articles suitable for high performance applications. The process generally comprises reacting an organic nitrile having the formula R.sup.1 CN with a trialkylaluminum compound having the formula R.sup.2 R.sup.3 R.sup.4 Al, and optionally heating the reaction product, to form an organoaluminum imine, and heating the organoaluminum imine to a temperature of at least 300.degree. C. and less than 600.degree. C. for at least two hours to form an aluminum-nitrogen polymer. The polymer or the imine can be pyrolyzed to form an aluminum nitride ceramic article. In the foregoing formulae, R.sup.1 is an alkyl, cycloalkyl, aryl, aralkyl, hetero(ar)alkyl, or heterocyclic-substituted alkyl group, and R.sup.2, R.sup.3, and R.sup.4 are each independently an alkyl, aryl, or aralkyl group, wherein any alkyl moiety comprises 1-12 carbon atoms, and wherein heteroatoms are selected from nitrogen, oxygen, and silicon.
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Bleutge John C.
Gulakowski Randy
Lanxide Technology Company, LP
Lewis Carol A.
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