Polyester compositions, methods of manufacturing the compositions, and articles made therefrom

A composition and polymer technology, applied in the field of polyester and polymer composition, can solve the problems such as shape memory properties that have not been reported

Active Publication Date: 2009-11-25
WL GORE & ASSOC INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent publication does not report any shape memory properties of the material, only describing the resulting polyester as an elastomer

Method used

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  • Polyester compositions, methods of manufacturing the compositions, and articles made therefrom
  • Polyester compositions, methods of manufacturing the compositions, and articles made therefrom
  • Polyester compositions, methods of manufacturing the compositions, and articles made therefrom

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0196] Crosslinked polymeric reaction products of diacids, diols and triols were prepared according to a two-step process. In the first step, the following components were placed in a 500 ml glass reactor: the diacid component was 202.25 grams of sebacic acid (Aldrich, 99%), the diol was 43.46 grams of ethylene glycol (Aldrich, 99.8% anhydrous), the triol is 26.26 grams of glycerol (Aldrich, 99.5%+ spectrophotometric grade). The reactor was equipped with stirrer, heating device, steam condensing device, liquid volume measuring device, temperature regulating device, temperature measuring device and nitrogen purging device.

[0197] At room temperature, the reactants form a heterogeneous mixture of solid and liquid phases. As the temperature increased to about 170°C, the mixture formed a homogeneous liquid. Time and process parameters were recorded when all materials formed a single phase liquid. By-product water vapor formed from the reactor was condensed and collected in a ...

Embodiment 4

[0216] 67.3 grams of the intermediate prepared and described in Comparative Example 2 and 32.7 grams of the intermediate prepared and described in Comparative Example 3 were mixed in a 4 oz glass jar and placed in a vacuum oven at 125°C and atmospheric pressure. Place a 125 mm diameter Teflon TM The crystallization dish and laboratory mixing propeller assembly were also placed in the vacuum oven at this time. After 3 hours, the glass jar and its liquid intermediate contents were removed from the vacuum oven and immediately placed on an appropriately sized heating mandrel, a thermocouple was inserted into the molten mass, and the temperature was maintained at 125 ± 5°C for 5 minutes. The intermediate was then mixed at medium speed for 5 minutes until complete mixing appeared and a single phase liquid which could be considered homogeneous was formed. Transfer 25 g of liquid to preheated Teflon TM In the crystallization dish, put back in the vacuum oven of 125 ℃ and atmospheric...

Embodiment 5

[0219] 46.8 grams of the intermediate prepared and described in Comparative Example 2 and 53.2 grams of the intermediate prepared and described in Comparative Example 3 were mixed in a 4 oz glass jar.

[0220] Glass jars containing these intermediates were placed in a vacuum oven at 125°C and atmospheric pressure. Place a 125 mm diameter Teflon TM The crystallization dish and laboratory mixing propeller assembly were also placed in the vacuum oven at this time. After 3 hours, the glass jar and its liquid intermediate contents were removed from the vacuum oven and immediately placed on an appropriately sized heating mandrel, a thermocouple was inserted into the molten mass, and the temperature was maintained at 125 ± 5°C for 5 minutes. The intermediate was then mixed at a moderate speed for 5 minutes until the intermediate appeared to be completely mixed and formed a visibly homogeneous single-phase liquid. Transfer 25 g of liquid to preheated Teflon TM In the crystallizatio...

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Abstract

Crosslinked polymer compositions have backbones with first and second divalent saturated aliphatic moieties, a divalent saturated aliphatic secondary alcohol moiety, and a trivalent saturated aliphatic moiety. Hydrolytically labile ester bonds joined together these moieties. These polyesters may be polycondensation reaction products of a diol, a triol and a diacid. A molar ratio of the first divalent saturated aliphatic moiety, the divalent saturated aliphatic secondary alcohol moiety, and the trivalent saturated aliphatic moiety to the second divalent saturated aliphatic moiety is in the range of about 0.85 to about 1.5. Preferably, these polyesters are non-cytotoxic, biocompatible, bioabsorbable, or exhibit shape memory behavior with at least one transition temperature of greater than about 30DEG C and less than about 100DEG C and most preferably exhibit each of these qualities. The compositions may be adapted for a wide variety of uses, including medical applications.

Description

field of invention [0001] The present invention relates to a polymer composition, in particular to polyester, more specifically to a crosslinked polyester produced by the polycondensation reaction of diol, triol and diacid, a preparation method of the composition and a product prepared therefrom. Background of the invention [0002] Synthetic polymers known to be biocompatible and bioabsorbable in vivo can be used to fabricate implantable medical devices. Many of these bioabsorbable polymers are of the polyester class. For example, aliphatic polyesters have been employed in drug delivery systems. [0003] Known biodegradable polyester polymer / copolymer materials include: polydioxanone (polydioxanone, PDS), polyglycolic acid (PGA), poly-L-lactic acid (PLA), and polyglycolic acid and L- Copolymers of lactic acid or propylene carbonate (TMC). [0004] Linear polyesters can be formed by ring-opening polymerization of cyclic esters or lactones, or by condensation polymerizatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/12A61L31/14A61L31/06
CPCC08G63/20C08G2101/0008C08G2280/00C08G18/4241A61L31/146C08G2230/00A61L31/148A61L31/06C08G2110/0008C08L67/00
Inventor B·J·斯维特林K·A·马兹奇S·A·里昂
Owner WL GORE & ASSOC INC
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