Incorporation of a resin dispersion to improve the moisture resistance of gypsum products
AssigneeEastman Chemical Company
InventorsLaura Lee Martin, Andrea Gail Hagood, Carol Ann Perkins, Rajesh Raja Puthenkovilakom
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Abstract
This invention relates to a composition suitable for use in making moisture resistant gypsum products. In particular, this invention relates to resin dispersions and their use in combination with gypsum to form moisture resistant gypsum compositions which are settable by hydration. Further, the invention relates to moisture resistant products formed from such settable gypsum compositions, e.g. panels and boards, and a method for the manufacture of such moisture resistant gypsum products.
Claims17
A moisture resistant gypsum composition comprising a dried mixture of gypsum and a resin dispersion comprising at least one resin selected from the group consisting of polyterpene resins and hydrogenated polyterpene resins;
- aliphatic petroleum hydrocarbon resins and the hydrogenated derivatives thereof;
- aromatic hydrocarbon resins and the hydrogenated derivatives thereof;
- and alicyclic petroleum hydrocarbon resins and the hydrogenated derivatives thereof dispersed in water, wherein the moisture resistant gypsum composition excludes a wax.
A moisture resistant gypsum composition comprising gypsum and a resin selected from the group consisting of modified rosins and the hydrogenated derivatives thereof;
- esters of modified rosins and the hydrogenated derivatives thereof;
- polyterpene resins and hydrogenated polyterpene resins including natural terpenes, aromatically modified terpene resins, and synthetic polyterpenes;
- aliphatic petroleum hydrocarbon resins and the hydrogenated derivatives thereof;
- aromatic hydrocarbon resins and the hydrogenated derivatives thereof;
- alicyclic petroleum hydrocarbon resins and the hydrogenated derivatives thereof, cycloaliphatic resins, mixed aliphatic-aromatic resins, pentaerythritol, glycerols and triethylene glycol esters of rosin, wherein the resin is not a Diels-Alder adduct of maleic anhydride and wherein the moisture resistant gypsum composition excludes a wax.
An article comprising:
- a core member comprising a moisture resistant gypsum composition, wherein the core member presents at least one surface;
- and
- at least one lining member bonded to at least a portion of the at least one surface of the core member,
- wherein the moisture resistant gypsum composition comprises gypsum and at least one resin, wherein the resin is not a modified or unmodified rosin, rosin derivative, rosin ester, or hydrogenated rosin ester and wherein the moisture resistant gypsum composition excludes a wax.
A gypsum-containing article selected from the group consisting of a regular gypsum board, an impregnated board, a hard board, a high density board, a water repellent board, a wallboard, a cement board, a tile, a block, and a cast, wherein the article comprises a moisture resistant gypsum composition formed by combining a mixture comprising gypsum and water with a resin dispersion to thereby form an aqueous gypsum mixture, wherein the resin dispersion comprises at least one resin selected from the group consisting of polyterpene resins and hydrogenated polyterpene resins;
- aliphatic petroleum hydrocarbon resins and the hydrogenated derivatives thereof;
- aromatic hydrocarbon resins and the hydrogenated derivatives thereof;
- and alicyclic petroleum hydrocarbon resins and the hydrogenated derivatives thereof, at least one surfactant, and water, wherein the moisture resistant gypsum composition excludes a wax.
Dependencies are inferred from the claim text.