Fluoropolymer dispersions
US6277906A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 2000 |
| Grant date | Aug 21, 2001 |
| Priority date | — |
| Expiry date | Nov 6, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2327/18
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Fluoropolymer aqueous dispersions comprising an hydrogenated nonionic surfactant and a fluorinated nonionic surfactant selected from the following classes: EQU R.sub.f --L--(OCH(R.sub.1)--CH(R.sub.2) ).sub.n --O--A (I) wherein: PA1 n is an integer comprised between 4 and 60; PA1 L is selected from: PA2 --(CF(Y)--CO--O).sub.p R'--; --(CF(Y)--CO--NH).sub.p R'--; --(CF(Y)--SO.sub.2 --NH).sub.p R'--; PA3 wherein: p is 0 or 1; Y can be F or CF.sub.3 ; R' is an alkylic radical C.sub.1 -C.sub.5 ; PA1 R.sub.1, R.sub.2 can preferably be both H or the former H and the latter CH.sub.3, PA1 R.sub.f can be a radical of (per)fluoroalkane type from 4 to 20 C atoms or of (per)fluoropolyether type; PA1 A is selected from the following ones: PA2 --H; --CH, --CH.sub.2 OH; --CH.sub.2 OCH.sub.2 CH.sub.2 OH; --CH.sub.2 (OCH.sub.2 CH.sub.2).sub.n'" OR' wherein n'" is an integer between 2 and 15 and R' is H, CH.sub.3, COCH.sub.3 ; --CONHCH.sub.2 CH.sub.2 OH.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.