Compositions and method for producing fuel resistant liquid polythioether polymers with good low temperature flexibility
US5912319A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 1997 |
| Grant date | Jun 15, 1999 |
| Priority date | — |
| Expiry date | Feb 19, 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 -- wherein PA1 R.sup.1 denotes a divalent C.sub.2-6 n-alkyl, C.sub.3-6 branched alkyl, C.sub.6-8 cycloalkyl or C.sub.6-10 alkylcycloalkyl 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 methylene, a divalent C.sub.2-6 n-alkyl, C.sub.2-6 branched alkyl, C.sub.6-8 cycloalkyl or C.sub.6-10 alkylcycloalkyl 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 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…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.