High-molecular weight polymers and methods of manufacture
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 21, 2004
Grant Date -
May 15, 2003
app pub date -
Oct 8, 2002
filing date -
Nov 14, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A composition comprises a solid-stated block copolymer of an aromatic polyester and a caprolactone, wherein the copolymer has been solid state polymerized such that intrinsic viscosity increases at least 20%, the caprolactone content decreases no more than 1.2% absolute and the transesterification increases no more than 3.5% absolute, and wherein the solid-stated copolymer has an intrinsic viscosity of at least 0.82. Particularly preferred chain extension reactions are performed at a temperature of less than 175.degree. C., and even more preferably at less than 165.degree. C. In further aspects of the inventive subject matter, yarns and methods of producing a fiber include contemplated solid-stated block copolymers.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully