C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 63/88 (2006.01) C08G 63/08 (2006.01) C08G 63/78 (2006.01)
Patent
CA 2710098
The present invention is directed to a process for producing crystalline polyglycolic acid, wherein (a) a difference (Tm - Tc2) between the melting point Tm defined as the maximum point of the endothermic peak attributable to melting of a crystal detected in the course of heating at a heating rate of 10°C/min by means of a differential scanning calorimeter and the crystallization temperature Tc2 defined as the maximum point of the exothermic peak attributable to crystallization detected in the course of cooling from a molten state at a cooling rate of 10°C/min is not lower than 35°C, and (b) the difference (Tc1 - Tg) between the crystallization temperature Tc1 defined as the maximum point of the exothermic peak attributable to crystallization detected in the course of heating an amorphous sheet at a heating rate of 10°C/min by means of a differential scanning calorimeter and the glass transition temperature Tg defined as a temperature at a second-order transition point on a calorimetric curve detected in said course is not lower than 40°C, the process comprising applying heat history to crystalline polyglycolic acid at a temperature between the melting point Tm of the crystalline polyglycolic acid + 38°C and Tm + 100°C for 1 to 100 minutes.
Itoh Daisuke
Miura Hiromitsu
Nakajima Junji
Ono Toshihiko
Yamane Kazuyuki
Kirby Eades Gale Baker
Kureha Corporation
LandOfFree
Crystalline polyglycolic acid, polyglycolic acid composition... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Crystalline polyglycolic acid, polyglycolic acid composition..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Crystalline polyglycolic acid, polyglycolic acid composition... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1369752