Paper coated with ammonia-containing sizing compositions

Stock material or miscellaneous articles – Composite

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428511, 428512, 428513, 428537, 428538, B32B 904, B32B 2308, B32B 2104, B32B 2710

Patent

active

040937798

ABSTRACT:
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.

REFERENCES:
patent: 3390046 (1968-06-01), McDavid
patent: 4022634 (1977-05-01), Emerson et al.
patent: 4025354 (1977-05-01), Emerson et al.

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