Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Treating polymer containing material or treating a solid...
Patent
1978-02-01
1979-09-11
Lee, Lester L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Treating polymer containing material or treating a solid...
528188, 528350, 528352, 528353, C08G 7314
Patent
active
041676203
ABSTRACT:
Process for heat treating a shaped article of polyamide-imide or polyamic acid comprising preheating the article to remove a major portion of volatiles contained in the article and generated therein and to increase the polymer's deflection temperature by about 15 to about 35.degree. F. without deformation of the article, and heating the article at about 5.degree. to about 25.degree. F. below the increased deflection temperature to progressively increase the polymer's deflection temperature to substantially its maximum attainable value without deformation, said preheating and heating being carried out in the presence of a circulating gas.
REFERENCES:
amoco Torlon Engineering Resins, Annealing Torlon Parts to Obtain Optimum Properties, TAT-5, Jun. 1975.
Amoco Torlon Engineering Resins, Post Curing of Torton, TAT-5, Apr. 1977.
Gilkes Arthur G.
Hensley Stephen L.
Lee Lester L.
McClain William T.
Standard Oil Company (Indiana)
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