Abstract: An aqueous, curable, composition comprising (1) a pre-polymer of a styrene-butadiene copolymer and (2) TiO.sub.2 , the composition, when applied to a liner board substrate, forming a waterproof coating.

Abstract: A recyclable double-faced liner bard, the board having a top layer, a medium corrugated layer, and a bottom layer, the top layer having a coating formed from an aqueous composition comprising (A) an emulsion of a curable butadience-styrene copolymer and (B) TiO.sub.2, the medium layer having a coating formed from an aqueous composition containing an emulsion of wax particles and a binder (preferably sodium alginate); and the bottom layer having a coating formed from an aqueous composition comprising about 10 to 85 percent by weight of a liquid curable styrene-butadiene copolymer (or a carboxylated copolymer) and wax.

Abstract: An aqueous treating coating composition suitable for coating a middle corrugated layer of a double-faced liner board, the composition comprising: (A) an emulsion of wax particles, and (B) a binder that is (1) an alkali metal alginate, or (2) a solvent soluble styrene/acrylic copolymer, or (3) a mixture of the styrene/acrylic copolymer with a water-soluble melamine/formaldehyde prepolymer.

Abstract: An aqueous coating composition adapted for coating the bottom layer of a double-faced liner board, the composition containing a carboxylated styrene-butadiene copolymer and wax with an aqueous solution of an alkali metal alginate as an optional ingredient.