Stock material or miscellaneous articles – Surface property or characteristic of web – sheet or block
Patent
1983-02-08
1986-01-21
Ives, Patricia C.
Stock material or miscellaneous articles
Surface property or characteristic of web, sheet or block
428 35, 428339, 428421, 4284744, 428473, 428515, 428516, 428532, 4284231, 428446, 428518, 428457, 424 16, 424 31, 424 32, 424 33, 424361, 424 35, 424 36, 424180, 424183, 2105002, 514 56, 514 59, 514777, A61F 100, A61M 2500, B01D 3900, B32B 2708
Patent
active
045657408
ABSTRACT:
A surface modified substrate, wherein the substrate carries a complex adsorbed thereto, which complex is of a polymeric cationic surfactant that contains primary amino nitrogens as well as secondary and/or tertiary amino nitrogens, and a dialdehyde that has 1-4 carbon atoms between the two aldehyde groups. To said complex there may additionally be bonded an anionic compound and optionally alternatingly additional cationic and anionic compounds. The modification primarily means that positive or negative charges can be imparted to the original substrate. Secondly, however, the point may be to utilize reactive groups in bonded cationic or anionic compounds.
The surface modified substrate is prepared by contacting the substrate with the polymeric cationic surfactant and the dialdehyde at such conditions that a complex is formed, which is adsorbed onto the substrate surface, and optionally continuing the ionic bonding with an anionic compound and possibly also alternatingly additional cationic and anionic compounds. The polymeric cationic surfactant and the dialdehyde are preferably utilized, separately or together, dissolved in a polar solvent, preferably water. The formation of the complex takes place at a pH-value above 8, whereupon the charges are preferably created at a pH-value below 7.
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patent: 4229838 (1980-10-01), Mano
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patent: 4326532 (1982-04-01), Hammar
Golander Carl-Gustaf
Larsson Rolf
IRD-Biomaterial AB
Ives Patricia C.
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