Method for preparing poly-p-dioxanone polymer

C - Chemistry – Metallurgy – 08 – G

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C08G 63/664 (2006.01) C08G 63/91 (2006.01)

Patent

CA 2263578

Poly-p-dioxanone is prepared in a process comprising: (a) heating a reaction mixture comprising p-dioxanone and an effective amount of a polymerization catalyst under conditions of temperature and pressure effective to produce a reaction product mixture comprising molten poly-p-dioxanone and unreacted p- dioxanone; (b) adding to said reaction product mixture a cyclic anhydride under conditions effective for reaction of the poly-p-dioxanone with the cyclic anhydride to form an end-capped poly-p-dioxanone; (c) exposing the reaction product mixture to a temperature within the range of 50 to 150 ~C under reduced pressure and removing unreacted p-dioxanone from the reaction product mixture; and (d) recovering the end-capped poly-p-dioxanone. The invention process permits the economical production of high molecular weight poly-p-dioxanone in the melt.

On prépare de la poly-p-dioxanone selon le procédé suivant: (a) on chauffe un mélange de réaction comprenant de la p-dioxanone et une quantité efficace d'un catalyseur de polymérisation, dans des conditions de température et de pression efficaces pour produire un mélange produit de réaction contenant de la poly-p-dioxanone et de la p-dioxanone n'ayant pas réagi; (b) on ajoute audit mélange un anhydride cyclique dans des conditions permettant la réaction de la poly-p-dioxanone avec l'anhydride cyclique, de façon à former une poly-p-dioxanone à extrémité protégée; (c) on expose le mélange produit de réaction à une température comprise entre 50 et 150 ·C sous une pression réduite et on sépare la p-dioxanone n'ayant pas réagi dudit mélange; et (d) on récupère la poly-p-dioxanone à extrémité protégée. Le procédé de l'invention permet de produire d'une manière économique de la poly-p-dioxanone de poids moléculaire élevé à l'état fondu.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Method for preparing poly-p-dioxanone polymer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for preparing poly-p-dioxanone polymer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for preparing poly-p-dioxanone polymer will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-2027185

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.