Water Resistant Paper and Solution for Producing Same and Building Structure Employing Same

A high performance polymer coating composition formed by the steps of:

• admixing a composition of at least one hydroxypropyl methyl cellulose ether compound and water to form a composition of having a viscosity between 2000 and 6000 cps, wherein the cellulose ether compound has the general formula:
• wherein each R is hydrogen or an alkyl group selected from the group consisting of methyl, ethyl, hydroxyethyl, hydroxyethyl, hydroxypropyl carboxymethyl, hydroxyethylmethyl, hydroxypropyl, and
• wherein n is integer between 50 and 1000;
• to the admixed composition of at least one cellulose ether compound and water, adding an emulsion of water and an anionic styrene butadiene copolymer in sufficient quantity to produce a solution viscosity between 1000 to 1500 cps, wherein the emulsion of water and anionic styrene butadiene copolymer has a solids content between 40 and 50 wt. % and a specific gravity between 1.00 and 1.10;
• adding an ammonia compound to the admixed composition in an amount between 0.3 and 1.0 wt. %;
• and
• adding calcium carbonate to the admixed composition in an amount sufficient to provide calcium carbonate in the composition to be applied in an amount between 20 and 40 wt. %, the calcium carbonate the calcium carbonate having a median particle size between 1 μm to 1000 μm;
• after introducing the ammonia compound to the resulting composition, applying the composition to a flexible paper substrate;
• and
• allowing at least a portion of the water in the resulting composition to evaporate after application.

A coating composition comprising:

• between 20 and 50 wt. % of an anionic styrene butadiene copolymer;
• between 20 and 40 wt. % calcium carbonate, the calcium carbonate having a median particle size between 1 μm to 1000 μm;
• between 0.003 and 1.0 wt. % of a cellulose ether compound, the cellulose ether compound having the general formula:
• wherein R is hydrogen or an alkyl group selected from the group consisting of methyl, ethyl, hydroxyethyl, hydroxypropyl carboxymethyl, hydroxyethylmethyl, hydroxypropyl, and wherein R1 is hydrogen or an alkyl group selected form the group consisting of methyl, ethyl, hydroxyethyl, hydroxypropyl carboxymethyl, hydroxyethyl methyl, hydroxypropyl and mixtures thereof and wherein R2 is selected from the group consisting of hydroxyethyl, hydroxypropyl carboxymethyl, hydroxyethyl methyl, hydroxypropyl and mixtures thereof;
• wherein n is integer between 50 and 1000;
• between 0.3 and 1.0 wt. % of an ammonia compound, the ammonia compound selected from the group consisting of ammonia, ammonia persulfate, ethylenediamine, and mixtures thereof;
• between 0 and 1.0 wt. % of an anti-foaming agent selected from the group consisting of fatty alcohols, fatty acid soaps, fatty acid ethers, silicone-based defoamers, and mixtures thereof;
• and
• water.

A composite structure comprising:

• an elongated substrate, the elongated substrate composed of Kraft paper having paper basis weight between 30 and 90 pounds and an average thickness between 0.003 and 0.009 inches, the elongated substrate having a first planar face and a second planar face, the second planar face opposed to the first planar face;
• a polymeric layer overlying at least a portion of the first planar face of the elongated substrate, the polymeric layer comprising a polymeric blend of:
• between 50 and 80 wt. % of a styrene butadiene copolymer wherein at least a portion of the styrene butadiene copolymer is present as carboxylated styrene butadiene having a glass transition temperature midpoint of 5° C.:
• between 0.2 and 3 wt. % of a cellulose ether compound, the cellulose ether compound having the general formula:
• wherein each R is hydrogen or an alkyl group selected from the group consisting of methyl, ethyl, hydroxyethyl, hydroxypropyl carboxymethyl, hydroxyethylmethyl, hydroxypropyl, and wherein n is integer between 50 and 1000;
• and
• between 30 and 50 wt. % calcium carbonate.