Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1996-12-16
1998-09-22
Mosley, Terressa
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
428357, 428364, 428480, 524195, 524437, C08G 6300
Patent
active
058115080
ABSTRACT:
A process for the production of hydrolysis resistant polyester fibers and filaments (preferably monofilaments for use in paper making machine sieves) comprises feeding a masterbatch of a polymeric carrier and an end group blocking agent to a spinneret together with a thread-forming polyester material, wherein the polymeric carrier has practically no end groups which react with the end group blocking agents. In addition to the process and the masterbatch, the polyester fibers or filaments of increased resistance to hydrolysis, in which the agents for blocking the end groups are distributed inhomogeneously over the cross-section of the monofilament, comprise a content of end group blocking agent that increases continuously from the core to the jacket of the fiber.
REFERENCES:
patent: 5246992 (1993-09-01), Wick et al.
Patent Abstracts of Japan, vol. 018, No. 107, Feb. 22, 1994 & JP 05 302212 (Toray Ind Inc), Nov. 16, 1993.
Database WPI Section Ch, Week 9531 Derwent Publications Ltd., London, GB; Class A23, An95-237442 & JP 07 145 511 A (Nippon Ester Co Ltd), Jun. 6, 1995.
Brecheler Reimund
Zeitler Herbert
Hoechst Trevira GmbH & Co KG
Mosley Terressa
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