Composition and method for producing fuel resistant liquid polythioether polymers with good low temperature flexibility
US6172179A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 1997 |
| Grant date | Jan 9, 2001 |
| Priority date | — |
| Expiry date | Sep 12, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L61/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polythioether includes a structure having the formula I EQU --R.sup.1 --[--S--(CH.sub.2).sub.2 --O--[--R.sup.2 --O--].sub.m --(CH.sub.2).sub.2 --S--R.sup.1 --].sub.n -- I wherein PA1 R.sup.1 denotes a C.sub.2-6 n-alkylene, C.sub.3-6 branched alkylene, C.sub.6-8 cycloalkylene or C.sub.6-10 alkylcycloalkylene group, --[(--CH.sub.2 --).sub.p --X--].sub.q --(--CH.sub.2 --).sub.r --, or --[(--CH.sub.2 --).sub.p --X--].sub.q --(--CH.sub.2 --).sub.r -- in which at least one --CH.sub.2 -- unit is substituted with a methyl group, PA1 R.sup.2 denotes a C.sub.2-6 n-alkylene, C.sub.2-6 branched alkylene, C.sub.6-8 cycloalkylene or C.sub.6-10 alkylcycloalkylene group, or --[(--CH.sub.2 --).sub.p --X--].sub.q --(--CH.sub.2 --).sub.r --, PA1 X denotes one selected from the group consisting of O, S and --NR.sup.6, PA1 R.sup.6 denotes H or methyl, PA1 m is a rational number from 0 to 10, PA1 n is an integer from 1 to 60, PA1 p is an integer from 2 to 6, PA1 q is an integer from 0 to 5, and PA1 r is an integer from 2 to 10. The polythioether is a liquid at room temperature and pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.