Paper making and fiber liberation – Processes and products – Non-fiber additive
Patent
1982-09-21
1984-10-23
Smith, William
Paper making and fiber liberation
Processes and products
Non-fiber additive
1621643, 1621646, D21H 358
Patent
active
044786824
ABSTRACT:
Disclosed is a method for sizing paper wherein the sizing agent employed is a hydrophobic cellulose reactive sizing agent such as a ketene dimer sizing agent. There is employed in combination with the sizing agent a novel sizing accelerator. Disclosed also is a novel sizing composition comprised of the sizing agent and the accelerator, the accelerator being a water-soluble nitrogen-containing reaction product of (1) a water-soluble polyaminopolyamide, such as that derived by reaction of adipic acid and diethylene-triamine; (2) an epihalohydrin, such as epichlorohydrin; and (3) a composition comprising, by weight, from about 20% to about 65% bis(hexamethylene)triamine, said composition being the residue obtained after recovery of hexamethylenediamine from its manufacture by hydrogenation of adiponitrile.
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Bankert Ralph A.
Dumas David H.
Hercules Incorporated
Smith William
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