Polyester fibers modified with carbodiimides and process for their preparation
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 21, 1993
Grant Date -
N/A
app pub date -
Sep 13, 1990
filing date -
Sep 15, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Polyester fibers and filaments which contain carboxyl end groups closed off by reaction with carbodiimides, wherein the closing off of the carboxyl end groups has predominantly been carried out by reaction with mono- and/or biscarbodiimides which the fibers and filaments still contain in the free form, however in as little an amount as less than 30 ppm (by weight) of the polyester, the content of free carboxyl end groups is less than 3 meq/kg of polyester and the fibers and filaments still contain at least 0.05% by weight of at least one free polycarbodiimide or a reaction product which still contains reactive carbodiimide groups, and a process for their preparation are described. The filaments described are particularly suitable for the production of paper making machinery screens.
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