Method of spinning a nylon yarn having improved retention of a soil repellent finish on the nylon yarn
US4591473A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 1984 |
| Grant date | May 27, 1986 |
| Priority date | — |
| Expiry date | Mar 20, 2004 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06M15/507
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention is a method to improve retention of a finish on nylon yarn, said finish containing the reaction product of epichlorohydrin with the reaction product of pyromellitic dianhydride with a long chain fluoroalcohol, comprising polymerizing said nylon in the presence of about 0.5 to 1 mole percent of a primary-tertiary diamine of the structure ##STR1## where R.sub.1 is an alpha, omega-alkylene group of 2 to 10 carbon atoms where cycloaliphatic, R.sub.2 and R.sub.3 are alkyl radicals of 1 to 4 carbon atoms, R.sub.4 is an alkylene radical of 1 to 10 carbon atoms and R.sub.5 is R.sub.4 or arylalkyl, R.sub.6 is H or alkyl of 1 to 4 carbons, so that said nylon polymer is melt stable. Also, for batch processing, polyethyleneimines of 300 to 1200 molecular weight, methylaminobispropylamine, N-(2-aminoethyl)-1,3-propanediamine, and 3,3'-iminobispropylamine are useful.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.