Process for preparing cycloolefin random copolymer pellets

Details Process for preparing cycloolefin random copolymer pellets Process for preparing cycloolefin random copolymer pellets

1994-01-28

1994-11-08

Seccuro, Jr., Carman J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525210, 528491, 528493, 528494, 528495, 526281, C08J 312, C08L 2308, C08L 4500

Patent

active

053628110

ABSTRACT:
Disclosed is a process for preparing cycloolefin random copolymer pellets, comprising adding an organic polar solvent to a solution of a copolymer obtained by copolymerizing ethylene and a specific cycloolefin and if desired an .alpha.-olefin other than ethylene, in an amount exceeding such an amount that the liquid mixture exhibits the cloud point, separating the copolymer solution utilizing phase separation phenomenon into a concentrated phase containing the cycloolefin random copolymer in a high concentration and a dilute phase containing said copolymer in a low concentration, feeding the obtained concentrated phase to an extruder where the solvents are removed and the copolymer is melted during extrusion processing, followed by pelletizing the copolymer. According to the invention, the steps for preparing cycloolefin random copolymer pellets can be reduced, and moreover, mold staining can De inhibited in the molding process of the resultant pellets because the pellets have low contents of the low molecular weight copolymer, the unreacted monomer, etc.

REFERENCES:
patent: 4614778 (1986-09-01), Kajiura et al.
patent: 4874808 (1989-10-01), Minami et al.
patent: 4918133 (1990-04-01), Moriya et al.
patent: 5043421 (1991-08-01), Golba et al.
patent: 5128446 (1992-07-01), Hayashi et al.
patent: 5142007 (1992-08-01), Sogane et al.
patent: 5179171 (1993-01-01), Minami et al.
patent: 5225503 (1993-07-01), Sogane et al.

Affiliated with

Also associated with

Rating

Process for preparing cycloolefin random copolymer pellets 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 for preparing cycloolefin random copolymer pellets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for preparing cycloolefin random copolymer pellets will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1783229