A stable two-component waterborne coating composition comprising an epoxy component A comprising a waterborne epoxy resin, a polymeric dispersant, and pigments and/or extenders; and a component B comprising a curing agent; providing coatings made therefrom with improved anti-corrosion properties; and a method of preparing the coating composition.

A masterbatch is disclosed including a sulfide compound (A) and silica (B). The sulfide compound (A) is a chain or cyclic compound of repeating units represented by

R—S.sub.x  (I)

where R represents a linear, branched or cyclic alkylene group having 1 to 12 carbon atoms; a linear, branched or cyclic (poly)oxyalkylene group having 1 to 12 carbon atoms; or a linear, branched or cyclic (poly)thioalkylene group having 1 to 12 carbon atoms (wherein the alkylene group, the (poly)oxyalkylene group and the (poly)thioalkylene group are unsubstituted or have 1 or more optional substituents), and x represents an integer from 1 to 8. The number of the repeating units n is 1 to 400 and each of n repeating units is the same or different from each other. The silica (B) satisfies following conditions that: BET specific surface area is 0.1 to 200 m.sup.2/g and DBP oil absorption is 50 to 300 ml/100 g.

A stable two-component waterborne coating composition comprising an epoxy component A comprising a waterborne epoxy resin, a polymeric dispersant, and pigments and/or extenders; and a component B comprising a curing agent; providing coatings made therefrom with improved anti-corrosion properties; and a method of preparing the coating composition.

An ion exchange membrane includes: a cation exchange resin material; and a macromolecular material that has an acidic functional group and is mixed in the cation exchange resin material.

Multilayer barrier films and methods of making the films are provided. The films include a smooth layer and a barrier layer directly disposed on the smooth layer. In some cases, the smooth layer includes a thiol-ene material as a polymeric matrix material. In some cases, the films have a sandwich structure of barrier layer/smooth layer/substrate/smooth layer/barrier layer.

A conductive polymer composite includes (A) a -conjugated polymer and (B) a dopant polymer which contains a repeating unit a which is shown by the following general formula (1) having weight-average molecular weight thereof in the range of 1,000 to 500,000, ##STR00001##
wherein, R.sup.1 represents a hydrogen atom or a methyl group; R.sup.2 represents a single bond, an ester group, or a linear, branched, or cyclic hydrocarbon group having 1 to 12 carbon atoms which may optionally contain any one of an ether group and an ester group or both; Z represents a phenylene group, a naphthylene group, or an ester group; and a is in the range of 0<a1.0. There can be provided a conductive polymer composite which has excellent filterability and film-formability by spin coating, and also can form a conductive film having high transparency and excellent flatness when the film is formed with the composite.