Process of making a shaped article from intermediate molecular w

Details Process of making a shaped article from intermediate molecular w Process of making a shaped article from intermediate molecular w

1989-02-28

1990-06-12

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

26433119, 26433121, 528183, 528185, 528188, 528191, 528353, B29C 4302, C08G 6926

Patent

active

049331329

ABSTRACT:
The present invention provides a process for preparing shaped articles and articles prepared by such process based on a polyimide polymer, the polymer prepared by subjecting a mixture of aromatic dianhydride and aromatic diamine monomers, at least one of which contains the group ##STR1## linking two aromatic moieties, wherein R is CF.sub.3 or phenyl, to a low temperature, substantially isothermal solution polymeriazation process wherein the content of the mixed monomers in solvent is maintained within the range of from about 8 to about 12% by weight solids concentration during the polymerization process. The process is conducted for a sufficient length of time and uniformity of temperature, generally below about 35.degree. C., to achieve a weight average polyimide polymer molecular weight within the range of about 80,000 to about 135,000, more preferably of about 90,000 to about 125,000, a polyimide inherent viscosity within the range of from about 0.45 to about 0.70, and a polydispersity with the range of from about 1.7 to about 2.6.

REFERENCES:
patent: 3234181 (1966-02-01), Olivier
patent: 3356648 (1967-12-01), Rogers
patent: 3391120 (1968-02-01), Fritz
patent: 3959350 (1976-05-01), Rogers
patent: 4276407 (1981-06-01), Bilow et al.
patent: 4477648 (1984-10-01), Jones et al.
patent: 4569988 (1986-02-01), Scola et al.
patent: 4631335 (1986-12-01), Scola et al.
patent: 4645824 (1987-02-01), Landis et al.
patent: 4692205 (1987-08-01), Sachdev et al.
patent: 4742152 (1988-05-01), Scola
patent: 4801682 (1989-01-01), Scola

Affiliated with

Also associated with

Rating

Process of making a shaped article from intermediate molecular w does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process of making a shaped article from intermediate molecular w, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process of making a shaped article from intermediate molecular w will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-615966