The implementation of the 'time' scale relies on Number.MAX_SAFE_INTEGER and Number.MIN_SAFE_INTEGER which are not available in IE 11 (and probably other IE versions).
This codepen link shows a basic chart with time scale, which displays data in chrome but doesn't show anything on IE 11:
https://codepen.io/anon/pen/GmaRYN
The ES6 definitions (9007199254740991 and -9007199254740991) seem to be sensible fallback values. I'll submit a pull request shortly.
Does that mean v2.6 doesn't work on IE11?
If that's the case we may want to consider a v2.6.1
I can confirm the time scale feature does not work on IE11 in 2.6, you just get a blank chart:

Insert these code before init Chart, it will work on IE:
if (Number.MAX_SAFE_INTEGER === undefined) {
Number.MAX_SAFE_INTEGER = 9007199254740991;
}
if (Number.MIN_SAFE_INTEGER === undefined) {
Number.MIN_SAFE_INTEGER = -9007199254740991;
}
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Insert these code before init Chart, it will work on IE:
if (Number.MAX_SAFE_INTEGER === undefined) {
Number.MAX_SAFE_INTEGER = 9007199254740991;
}
if (Number.MIN_SAFE_INTEGER === undefined) {
Number.MIN_SAFE_INTEGER = -9007199254740991;
}