Paper making and fiber liberation – Processes and products – Non-fiber additive
Patent
1989-06-23
1990-09-11
Chin, Peter
Paper making and fiber liberation
Processes and products
Non-fiber additive
1621646, 162166, 1621682, 162175, 162179, 1621811, D21H 1714
Patent
active
049560492
ABSTRACT:
Sizing agents, some of which are known compounds and some of which are novel aromatic compounds which contain in the aromatic nucleus a single hydrophobic substituent containing at least 5 carbon atoms and at least one anionic group, said hydrophobic substituent being linked to the aromatic nucleus through an ester, amide, urethane or urea bridge, with the CO group of ester and amide bridges being attached to the hydrophobic radical and a methylene group being optionally present between said bridges and the aromatic nucleus, are particularly suitable, together with commercially available retention aids, for use in a process for the mass sizing of paper or cardboard or for the surface sizing of paper.
REFERENCES:
patent: 2448247 (1948-08-01), Bellwood
patent: 2665206 (1954-01-01), Bradley
patent: 2665207 (1954-01-01), McMillan et al.
patent: 2692183 (1954-10-01), Ericks
patent: 4127418 (1978-11-01), Bateman
Casey, Pulp and Paper, vol. II (1981), pp. 1574, 1577, 1602, 1603, 1604, 1914 and 1915.
The Dictionary of Paper-Fourth Edition (1980), p. 267.
Bernheim Michael
de Sousa Bernardo
Rohringer Peter
Strasilla Dieter
Chin Peter
Ciba-Geigy Corporation
McC. Roberts Edward
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