Transparent paramagnetic polymer
AssigneeE. I. Du Pont de Nemours and Company
InventorDavid M. Dean
Life of this patent
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Abstract
This invention provides a transparent, paramagnetic polymer composition in which a polymer is completed with sufficient rare earth ions, particularly ions selected from ions in the group of elements 64-69, to provide a polymer with a magnetic mass susceptibility greater than 20×10−6 emu/g measured at 298° K. This invention provides optically responsive devices that employ these transparent, paramagnetic polymers as an element that is responsive to a magnetic field and a means for providing magnetic field. This invention provides transparent labels or markings employing these transparent, paramagnetic polymers.
Claims18
A transparent, paramagnetic polymer composition comprising a non-ethylene containing polymer complexed with a sufficient amount of one or more rare earth ions selected from the group consisting of elements 64-69 to provide a polymer composition magnetic mass susceptibility of greater than 20×10−6 emu/g measured at 298° K.
A transparent, paramagnetic polymer composition comprising a non-ethylene containing polymer complexed with one or more rare earth ions selected from the group consisting of elements 64-69, the amount of rare earth ions being greater than 9 weight percent based on the total weight of the transparent, paramagnetic polymer.
A transparent, paramagnetic polymer composition comprising a non-ethylene containing polymer complexed with one or more rare earth ions selected from the group consisting of elements 66-67, the amount of rare earth ions being greater than 5 weight percent based on the total weight of the transparent, paramagnetic polymer.
The transparent, paramagnetic polymer composition of claim 15 wherein the transparent, paramagnetic polymer composition additionally comprises a short-chain fatty acid of the formula R1COOH wherein R1 is selected from the group consisting of C5-C30.
The transparent, paramagnetic polymer composition of claim 16 wherein the acrylate is methyl methacrylate, the acrylic acid is methacrylic acid, and the short chain fatty acid is oleic acid.
Dependencies are inferred from the claim text.