Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1990-12-17
1992-09-08
Kight, III, John
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528125, 528126, 528128, 528170, 528172, 528173, 528176, 528183, 528188, 528220, 528229, 528310, 528312, 528332, 528350, 528351, 525282, 525436, C08G 7314, C08G 6928, C08L 7710, C08L 7908
Patent
active
051459434
ABSTRACT:
Fusible polyimide powders are prepared by the process of this invention. An amic acid amine is first prepared by treating (n+1) moles of a bis(aminophenyl)methane with n mole of aromatic tetracarboxylic anhdride to produce an aromatic amic acid prepolymer. This prepolymer is then mixed with an unsaturated carbocyclic monoanhydride and the mixture heated to form a reactive end-capped polyamic acid precursor. The resulting composition is thermally treated in order to partially imidize the precursor. The resulting fusible polyimide powder is finally separated.
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patent: 5041528 (1991-08-01), Riel et al.
CA 73: 78075e, "Rapidly Hardenable Polyimides".
CA 76: 73183r, "Polyimide Prepolymers".
CA 114: 63792c, "Molded Product for Sliding Parts".
CA 107: 7837g, "Thermosetting Resins".
CA 110: 214137p, "Org. Solv.-Soluble Imide Oligomer Composition".
CA 112: 218178s, "Thermosetting resin Compositions".
CA 110: 193630h, "Storage-Stabb imide Oligomers for heat-res. Polymides".
CA 113: 79900b, "Imide Oligomer Comp. for heat-resistant Polyimides".
Lee John Y.
Li Hsueh M.
Ethyl Corporation
Hammond Richard J.
Hampton Hightower P.
Kight III John
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