The Plasmine Corporation

Reichhold Chemicals

Ralph W Emerson

John R Shattuck

Jerome L Martin

Improved sizing compositions for cellulosic products, e.g., paper, are provided by combining first and second composition components while at least the second component is finely divided into fine liquid or solid particles. Component combination in this manner serves to provide especially effective sizing compositions. The first component comprises a material which provides both ammonia and ammonium salt when combined with other materials in the composition. Such ammonia-ammonium salt-providing material comprises at least one material selected from the group consisting of ammonia, or a precursor thereof; ammonium salts, or a precursor thereof; a reaction product of urea and at least one selected Lewis acid; and mixtures of these materials. The second component comprises a saponified, partially saponified or unsaponified rosin that is modified with either an .alpha., .beta.-unsaturated aliphatic acid generally containing from about 3 to 10 carbon atoms, an anhydride of such acids, or mixtures thereof. The improved sizing compositions produced comprise ammonia, ammonium salt and modified rosin, which components are present in sizing-effective or sizing-enhancing amounts, such that a total acidity of the composition of at least about 1000 parts per million is realized.

Sizing agents for cellulosic products

Novel sizing comprising an aqueous mixture of ammonia, an ammonium salt of formic acid, and a rosin that is modified with from about 5 to 50 percent, based on the weight of the rosin, of an organic acidic compound selected from the group consisting of an .alpha.,.beta.-unsaturated organic acid, an anhydride thereof, and their mixtures. In one embodiment, the ammonia and ammonium salt are produced as the reaction product of urea and formic acid. A method of making the sizing compositions and paper which is sized with the sizing compositions are also provided.

Sizing compositions containing a formic acid salt, processes, and paper

Novel sizing compositions comprise an aqueous mixture of the reaction product of urea with selected Lewis acid, and a rosin that is modified with from about 5 to 50 percent based on the weight of the rosin, of an organic acidic compound selected from the group consisting of an .alpha.,.beta.-unsaturated organic acid, an anhydride thereof, and their mixtures. The selected Lewis acids which can be employed are sulfuryl chloride, chlorosulfonic acid, thionyl chloride, benzenesulfonyl chloride, benzenesulfonic acid, ortho- or para-toluenesulfonyl chloride, and ortho- or para-toluenesulfonic acid. Methods for making the sizing compositions and paper which is sized with the sizing compositions are also disclosed.

Ammonia containing rosin sizes

Novel sizing compositions comprising an aqueous mixture of ammonia, an ammonium salt, and a rosin that is modified with from about 5 to 50 percent based on the weight of the rosin, of an organic acidic compound selected from the group consisting of an .alpha.,.beta.-unsaturated organic acid, an anhydride thereof, and their mixtures. In one embodiment, the ammonia and ammonium salt are produced as the reaction product of urea and an acid selected from the group consisting of sulfamic acid, phosphoric acid, oxalic acid, methane-sulfonic acid, trichloracetic acid, nitric acid, sulfuric acid, hydrochloric acid, stearic acid, and acetic acid. The method of making the sizing compositions and paper which is sized with the sizing compositions are also provided.

Paper coated with ammonia-containing sizing compositions

This invention is directed to novel sizing agent compositions containing urea which is chemically modified and/or combined with other materials which produce desirable sizing properties. These novel agents are used as beater additives in pulp refining for the manufacture of cellulosic products or are applied to finished cellulosic products as surface sizes. The invention is also directed to methods of making the sizing agents. In one preferred embodiment, urea is reacted with sulfamic acid and the resulting reaction product is combined with rosin and further reacted to produce a novel sizing agent.

Urea containing sizing compositions

Novel sizing compositions comprising an aqueous mixture of ammonia, an ammonium salt, and a rosin that is modified with from about 5 to 50 percent based on the weight of the rosin, of an organic acidic compound selected from the group consisting of an .alpha., .beta.-unsaturated organic acid, an anhydride thereof, and their mixtures. In one embodiment, the ammonia and ammonium salt are produced as the reaction product of urea and an acid selected from the group consisting of sulfamic acid, phosphoric acid, oxalic acid, methane-sulfonic acid, trichloracetic acid, nitric acid, sulfuric acid, hydrochloric acid, stearic acid, and acetic acid. The method of making the sizing compositions and paper which is sized with the sizing compositions are also provided.

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Boston, MA, United States of America

Ralph W Emerson