Varnish compositions, methods of making and components made ther

Details Varnish compositions, methods of making and components made ther Varnish compositions, methods of making and components made ther

1998-08-25

2000-10-03

Dawson, Robert

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525107, 525165, 528271, 528392, C08F 2000, C08F 2040

Patent

active

061274909

ABSTRACT:
Apparatuses and methods are disclosed for the production of a polyester/epoxy copolymer that can be applied as a liquid to a surface prior to being cured. The method of preparing the polyester/epoxy copolymer includes mixing maleic acid with dicyclopentadiene to produce a ten-carbon double ring ester, promoting esterification with the addition of a source of hydroxyl, such as an alcohol or a glycol, to a desired acid number and reacting with an epoxy. Optionally, a source of unsaturation may also be added. Examples include excess maleic anhydride, fumaric acid, excess ten carbon ester, nadic anhydride, or tetrahydrophthalic acid. Electrical components of the present invention include a cured coating of the copolymer of the present invention over at least a portion of the component. Specific, selective modifications to 100% reactive polyester/epoxy copolymer electrical varnishes can result in greatly improved moisture and chemical resistance properties.

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