Monsanto Company

John W Stoddard

Oscar A Pickett, Jr

A polymer including as integral parts of polymer chain, amide groups of the formula ##STR1## and phosphinic acid-salt groups of the formula ##STR2## wherein a and b are both greater than or equal to 2 and M is selected from the group of metal cations where n=1 or n=2. The polymer of the present invention is particularly useful in forming stain-resistant fibers for carpet pile.

Phosphorus-containing polymers and fibers formed therefrom

Copolyamides containing from 0.5 to 7.5 percent by weight of phosphorus as an integral part of their polymer chain are provided such as copolyamides prepared from adipic acid, hexamethylene diamine, and bis(.beta.-carboxyethyl)alkylphosphine oxide. Fibers prepared from these copolymers have permanent antistatic, moisture transport, moisture regain, and flame-resistant properties and are particularly useful in textile fiber applications such as in apparel, carpets and upholstery.

Phosphorus-containing copolyamides and fibers thereof

Copolyamides containing from 0.5 to 7.5% by weight of phosphorus as an integral part of their polymer chain are provided such as copolyamides prepared from adipic acid, hexamethylene diamine, and bis(.beta.-carboxyethyl)alkylphosphine oxide. Fibers prepared from these copolymers have permanent antistatic, moisture transport, moisture regain, and flame-resistant properties and are particularly useful in textile fiber applications such as in apparel, carpets and upholstery.

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Gulf Breeze, FL, United States of America

John W Stoddard