Method of making inorganically crosslinked layered compounds
This paper discusses a process for encapsulating an active moiety to hinder the egress of the active moiety into the environment. It comprises intercalating an active moiety into the layers of a compound selected from the group consisting of compounds represented by the general formula: M(O{sub 3}ZO{sub x}R){sub n} wherein M is a tetravalent metal selected from the group consisting of Zr, W, U, Ti, Th, Te, Sn, Si, Ru, Pu, Pr, Pb, Os, Nb, Mo, Mn, Ir, Hf, Ge and Ce; Z is a pentavalent atom selected from the group consisting of member of Group V of the Periodic Table of the Elements having an atomic weight of at least 30; x varies from 0 to 1; R is a radical selected from the group consisting of hydrogen and organo radicals wherein at least a portion of the R radicals comprise a crosslinkable functional group selected from the group consisting of hydroxyl amino; carboxylic acid, epoxide and sulphonyl groups; and n varies from {gt}1 to 2; the compound being characterized as a layered crystalline material comprising contiguous layers. Each of the layers being spaced from and substantially unconnected to its neighboring layer to thereby allow access of the active moiety into the interior of the crystalline materials, and crosslinking the layers to thereby connect the contiguous layers to neighboring layers and hinder egress of the active moiety from the interior of the crystalline material by reacting the compound with a hydroxy metal complex of aluminum, zirconium, titanium, chromium, zinc, thorium, antimony or mixtures thereof.
- Assignee:
- Occidental Research Corp., Los Angeles, CA (USA)
- Patent Number(s):
- A; US 4995897
- Application Number:
- PPN: US 7-345671
- OSTI ID:
- 5333191
- Country of Publication:
- United States
- Language:
- English
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