Polyimide sheet and preparation process of the sheet

Details Polyimide sheet and preparation process of the sheet Polyimide sheet and preparation process of the sheet

1989-10-17

1993-08-17

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, 528171, 528172, 528173, 528176, 528183, 528185, 528188, 528220, 528229, C08G 6926, C08G 7310

Patent

active

052370445

ABSTRACT:
Polyimide sheets having excellent thermal resistance and good surface appearance of the resultant sheets are obtained by a melt-extrusion process from a specific polyimide in the temperature range of 300.degree. C. to 450.degree. C. and a moisture content of 200 ppm or less.

REFERENCES:
patent: 3947402 (1976-03-01), Vollkommer et al.
patent: 3961009 (1976-06-01), Yoda et al.
patent: 4795798 (1989-01-01), Tamai et al.
patent: 4847349 (1989-07-01), Ohta et al.
patent: 4908409 (1990-03-01), Oikawa et al.
patent: 4971748 (1990-04-01), Sado
patent: 5087689 (1992-02-01), Ohta et al.
CA 113(24): 213463s, "Polyimide melt extrusion through tapered die in manufacture of film", Tsutsumi, et al, 1990.

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