Spherical porous cross-linked copolymers of chloromethylstyrene and divinylbenzene and the derivative thereof
Patent 4358546 Issued on November 9, 1982. Estimated Expiration Date: 
January 28, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
January 28, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3337480 3791999 3843566 Highly porous ion exchange resins prepared by suspension polymerization in the presence of linear polymer Macroreticular cation exchange beads and preparation of same Patent #: 4256840 InventorsAssigneeApplicationNo. 06/115862 filed on 01/28/1980US Classes:521/32, Treated with nitrogen-containing material521/38, From ethylenically unsaturated reactant only526/201Material contains previously formed normally solid polymer which is distinct from polymer to be formed and is a polymer formed from at least one ethylenic monomerExaminersPrimary: Hamrock, William F.Assistant: Kulkosky, Peter F. Attorney, Agent or FirmInternational ClassesC08F 8/00 (20060101)C08F 8/30 (20060101) C08F 212/00 (20060101) C08F 212/14 (20060101) Foreign Application Priority Data1979-02-09 JPAbstractA porous cross-linked copolymer of chloromethylstyrene and divinylbenzene having a divinylbenzene unit represented by Xm of from about 9.0 percent by mole to about 17.0 percent by mole based on the total moles of monomer units; a content of active chlorine atom of from about 5.25-0.08 Xm mmole/g-dry resin to about 6.43-0.10 Xm mmole/g-dry resin; a water regain of from about 0.10 ml/g-dry resin to about 1.20 ml/g-dry resin; and a total volume of micro pores having a diameter of from about 500 angstroms to about 3000 angstroms of from 0.10 ml/g-dry resin to about 1.20 ml/g-dry resin; and a porous iminodiacetic acid type chelating resin having a Xm of from about 9.0 percent by mole to about 17.0 percent by mole based on the total moles of all monomer units; an ion exchange capacity of from about 5.35-12.0 Xm/(205.6-1.30 Xm) meq/g-dry resin to about 7.93-18.1 Xm/(247.1-2.0 Xm) meq/g-dry resin; a water regain of from about 0.60 ml/g-dry resin to about 2.20 ml/g-dry resin; and the total volume of micro pores having a diameter of from about 500 angstroms to about 3000 angstroms of from about 0.05 ml/g-dry resin to about 0.60 ml/g-dry resin.Field of SearchFrom ethylenically unsaturated reactant only | |
