Crosslinkable linear polyether resin
AssigneeCiba-Geigy Corporation
InventorSameer H. Eldin
Life of this patent
Estimating the term…
Abstract
Linear polyether resins containing 100 to 10 mol % of the repeating structural unit of formula I ##STR1## and 90 to 0 mol % of the repeating structural unit of formula II ##STR2## wherein A is a linear unsubstituted or methyl-substituted alkylene group containing 4 to 100 carbon atoms in the linear alkylene chain, X denotes bridge members as defined in claim 1 and Y is an aromatic radical of a divalent phenol as defined in claim 1, are self-crosslinkable and can be crosslinked by heating to a temperature of not less than 250.degree. C. or by irradiation with energy-rich electromagnetic rays, affording products which are insoluble in organic solvents and which have high glass transition temperatures.
Claims9
A crosslinkable linear polyether resin having a specific viscosity of 0.1 to 2.5, measured at 30.degree. C. in a 2% solution in dimethylformamide, and containing, based on the total amount of structural units present in the polyether resin, 100 to 10 mol % of the repeating structural unit of formula I ##STR14## and 90 to 0 mol % of the repeating structural unit of formula II ##STR15## in which formulae above A is a linear unsubstituted or methyl-substituted alkylene group containing 4 to 20 carbon atoms in the linear alkylene chain, X is a member selected from the group consisting of --SO.sub.2 --, --CO--, --SO--, --N.dbd.N--, --CF.sub.2 --CF.sub.2 --, ##STR16## wherein R is C.sub.1 -C.sub.8 alkyl, or is ##STR17## wherein each of R' and R.sup.2 is a hydrogen or a halogen atom, Y is a radical of formula III or IV ##STR18## wherein R.sup.3 and R.sup.4 are the same or different and each is a halogen atom, C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 alkoxy, m and n are 0 or an integer from 1 to 4, and Z is a direct bond or a radical selected from the group consisting of --O--, --SO--, --SO.sub.2 --, --S--, --S--S--, or ##STR19## wherein each of R.sup.5 and R.sup.6 independently of the other is a hydrogen atom, C.sub.1 -C.sub.4 alkyl or phenyl, or is ##STR20##
Dependencies are inferred from the claim text.