Poly-2-pyrrolidone and a process for its preparation

Details Poly-2-pyrrolidone and a process for its preparation Poly-2-pyrrolidone and a process for its preparation

C - Chemistry, Metallurgy

08

G

402/231

C08G 69/24 (2006.01) D01F 6/68 (2006.01)

Patent

CA 1126441

POLY-2-PYRROLIDONE AND A PROCESS FOR ITS PREPARATION ABSTRACT OF THE DISCLOSURE A new type of poly-2-pyrrolidone suitable for melt spinning and a process for its preparation. The new poly-2-pyrrolidone is characterized in that the polymer in the virgin state has a relative viscosity (1 gram of polymer in 100 ml of 96% sulphuric acid at 20°C) of between 2.2 and 7.0, shows a weight loss of less than 5% by weight when heated from 20°C to the onset tempera- ture of thermal degradation at a rate 4°C per minute, the ratio between the relative viscosities after and before melt spinning ranges between 0.50:1 and 0.95:1, and the relative viscosity after melt spinning is at least 1.90. The new poly-2-pyrrolidone is prepared by polymerization of 2-pyrrolidone in the presence of an anionic catalyst and an accelerator wherein N-(2 capro- lactim)-caprolactam is used as the accelerator in an amount of between 0.05 and 5.0 mole percent relative to the monomer, and the polymerization is carried out at a temperature of between about 25 and 70°C until a rela- tive viscosity of at least 2.2 is obtained.

319683

Affiliated with

Also associated with

Rating

Poly-2-pyrrolidone and a process for its preparation does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Poly-2-pyrrolidone and a process for its preparation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Poly-2-pyrrolidone and a process for its preparation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-420096