METAL STABILIZERS FOR EPOXY RESINS AND DISPERSION PROCESS
A method comprising (a) mixing a stabilizer comprising a metal-containing compound, the metal-containing compound comprising a metal selected from the group consisting of Group 11-13 metals and combinations thereof, into a dispersant to provide a dispersion; and (b) adding the dispersion to a varnish, is disclosed.
1 . A method comprising:
(a) mixing a stabilizer comprising a metal-containing compound, said metal-containing compound comprising a metal selected from the group consisting of Group 11-13 metals and combinations thereof, into a dispersant to provide a dispersion;
(b) adding said dispersion to a varnish.
2 . A method in accordance with claim 1 wherein said mixing is high shear mixing.
3 . A method in accordance with claim 2 wherein the rate of said high shear mixing is at least 500 rpm.
4 . A method in accordance with claim 1 wherein said mixing is ball mill mixing.
5 . A method in accordance with claim 1 wherein said mixing is in a powder mixer, followed by co-extrusion.
6 . A method in accordance with claim 1 wherein the time period for said mixing is at least 30 seconds.
7 . A method in accordance with claim 1 wherein said dispersant is selected from the group consisting of a polyphenol, a polyepoxide, an anhydride, a polyamine, and combinations thereof.
8 . A method in accordance with claim 1 wherein said metal is zinc.
9 . A method in accordance with claim 8 wherein said metal containing compound is selected from the group consisting of a zinc salt, zinc hydroxide, zinc oxide, zinc acetylacetonate, an organic zinc compound and combinations of any two or more thereof.
10 . A method in accordance with claim 1 wherein said varnish further comprises a component selected from the group consisting of an inert filler, a solvent, and mixtures thereof.
11 . A method in accordance with claim 1 wherein said stabilizer is present in said dispersion in a range of from about 5 to about 75 weight percent, based on the total weight of the dispersion.
12 . A varnish produced by the method of claim 1 .
13 . A prepreg prepared from the varnish of claim 12 .
14 . An electrical laminate prepared from the varnish of claim 12 .
15 . A coating prepared from the varnish of claim 12 .
16 . A composite prepared from the varnish of claim 12 .
17 . A casting prepared from the varnish of claim 12 .
18 . An adhesive prepared from the varnish of claim 12 .