C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 65/48 (2006.01) C08G 75/02 (2006.01) C08G 75/12 (2006.01) C08G 75/20 (2006.01) C08G 75/23 (2006.01) C08J 11/10 (2006.01) C08L 81/02 (2006.01) C08L 81/06 (2006.01)
Patent
CA 2075576
DEPOLYMERIZATION OF POLYMERS AND THEIR USE IN THERMOSET COMPOSITIONS AND COMPOSITES Abstract of the Invention The present invention is a novel process of preparing a reactive reduced molecular weight polyarylene polyether from a starting polyarylene polyether, wherein said reduced molecular weight polyarylene polyether has a lower molecular weight than said starting polyarylene polyether. The process comprises the steps of first contacting said starting polyarylene polyether with a nucleophilic reagent for a period of time sufficient to reduce the molecular weight of said starting polyarylene polyether, and then recovering said reactive reduced molecular (Abstract cont'd.) weight polyarylene polyether. The reactive reduced molecular weight polyarylenes produced by such process can be used in combination with various other resins. This process produces many novel reactive polyarylene polyethers represented by the formula Image wherein Ar is a bivalent aromatic residue of a polyarylene polyether, Ar may vary within said reactive polyarylene polyether, at least a portion of Ar comprises an aromatic ether or an aromatic thioether group that is ortho or para in position to at least one SO2 group; E represents reactive groups having at least one reactive site, that are located at chain termini, along a chain, or both; z is the number average reactive sites per chain, 0.1 ? z ? 10., and n is the number average repeating units ArSO2.
Biswas Atanu
Chan Anita N.
Huarng Roger J-C.
Jabloner Harold
Swetlin Brian J.
Hercules Incorporated
Moffat & Co.
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