发明名称 |
DEACIDIFICATION OF CELLULOSE BASED MATERIALS USING PERFLUORINATED CARRIERS |
摘要 |
<p>An improved method of deacidifying books, imaged paper and other imaged materials having a cellulose base wherein, for a sufficient time to raise the pH of the materials, the materials are treated with alkaline particles of a basic metal oxide, hydroxide or salt dispersed in an inert perflourinated carrier, preferably selected from the group consisting of perfluoropolyoxyether, perfluoromorpholine and combinations thereof. Perfluoropolyoxyether alkanoic acid is added as a surfactant. Alternatively, when perfluoromorpholine is the carrier of choice, the surfactant may instead be potassium fluoroalkyl carboxylate.</p> |
申请公布号 |
GR3023907(T3) |
申请公布日期 |
1997.09.30 |
申请号 |
GR19970401555T |
申请日期 |
1997.06.26 |
申请人 |
PRESERVATION TECHNOLOGIES, INC. |
发明人 |
LEINER, LEE, H.;KIFER, EDWARD, W. |
分类号 |
D21H19/10;D21H25/00;D21H25/02;D21H25/18;(IPC1-7):D21H25/18 |
主分类号 |
D21H19/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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