Paper making and fiber liberation – Processes and products – Non-fiber additive
Patent
1988-04-26
1989-09-05
Chin, Peter
Paper making and fiber liberation
Processes and products
Non-fiber additive
162182, 422 1, 422 32, 422 34, 422 37, D21H 522
Patent
active
048635669
ABSTRACT:
A process and composition for use in the deacidification of cellulosic materials, such as books and printed papers, which comprises treating the materials under vacuum condition with a gaseous mixture of ammonia, and an organo epoxide reagent selected from the group consisting of alkyl compounds or mixtures thereof, and which produce in situ primary, secondary and tertiary amino compounds upon reaction with the ammonia.
REFERENCES:
patent: 3472611 (1969-10-01), Langwell
patent: 3676055 (1972-07-01), Smith
patent: 3703353 (1972-11-01), Kusterer et al.
Howe Michael L.
Warren Morris J.
Chin Peter
Jaskiewicz Edmund M.
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