Soil-repellent and abrasion-resistant monofilaments and methods of making and using same
US5759685A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 1995 |
| Grant date | Jun 2, 1998 |
| Priority date | — |
| Expiry date | Feb 27, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2969
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The process of making the soil-repellent and abrasion-resistant monofilament includes transesterifying dimethylterephthalate with ethylene glycol; adding to the resulting reaction mixture from 0.15 to 5 percent by weight of a polydialkylsiloxane of formula I: EQU --CO--R.sub.1 --Si(R.sub.2).sub.2 --O!.sub.n --Si(R.sub.2).sub.2 --R.sub.1 --CO-- (I), wherein n is the number of repeated --Si(R.sub.2).sub.2 --O-- groups and R.sub.1 or R.sub.2 represent the same or different radicals with 2 to 20 carbon atoms; then polycondensing to form a linear silicone-modified polyethylene terephthalate in which the polydialkyl siloxane of formula I is inserted into a polyethylene terephthalate polymer chain thereof; and extruding the linear silicone-modified polyethylene terephthalate to form a monofilament consisting of the silicone-modified polyethylene terephthalate having a silicon content of 0.05 to 2.0% by weight. The monofilament product has a cross-section with a diameter of from 0.1 to 1.0 mm, a homogeneous composition over the entire cross-section, a tenacity of at least 36 cN/tex, an elongation of less than 44% based on an unstretched portion and a soiling index of less than 10 after fiv…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.