Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1992-05-22
1993-12-21
Kight, III, John
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528170, 528171, 528173, 528174, 528176, 528179, 528185, 528188, 528220, 528229, 528352, C08G 6926, C08G 7310
Patent
active
052722481
ABSTRACT:
A process for preparing polyamides having enhanced melt flow properties is described. The process consists of heating a mixture of a high molecular weight poly(amic acid) or polyimide with a low molecular weight amic acid or imide additive in the range of 0.05 to 15% by weight of additive. The polyimide powders so obtained show improved processability, as evidenced by lower melt viscosity by capillary rheometry. Likewise, films prepared from mixtures of polymers with additives show improved processability with earlier onset of stretching by TMA.
REFERENCES:
patent: 3933749 (1976-01-01), Williams III
patent: 3983093 (1976-09-01), Williams III
patent: 4107125 (1978-08-01), Lovejoy
patent: 4142870 (1979-03-01), Lovejoy
patent: 4281100 (1981-07-01), Takekoshi
patent: 4444979 (1984-04-01), St. Clair et al.
patent: 4552931 (1985-11-01), St. Clair et al.
patent: 4603061 (1986-07-01), St. Clair et al.
patent: 5116939 (1992-05-01), Fletcher
Burks Harold D.
Pratt J. Richard
St. Clair Terry L.
Stoakley Diane M.
Hampton-Hightower P.
Helfrich George F.
Kight III John
The United States of America as represented by the United States
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