Modified disulphur polymer composition and method for making same.

摘要

A liquid polymer composition curable to a solid elastomer having good thermal stability which contains a mercaptan terminated disulfide polymer of the formula HS(RSS)_mR'SH wherein R is -C₂H₄-O-CH₂-O-C₂H₄-; R' is a member selected from the group consisting of alkyl of from 2 to 12 carbon atoms: alkyl thioether of from 4 to 20 carbon atoms; alkyl ether of from 4 to 20 carbon atoms and one oxygen atom; alkyl ether of from 4 to 20 carbon atoms and from 2 to 4 oxygen atoms each of which is separated from the other by at least 2 carbon atoms, alicyclic of from 6 to 12 carbon atoms and aromatic lower alkvl; and the value of m is such that mercaptan terminated disulfide polymer has a molecular weight of between 1,000 to about 4.000. The method includes cleaving a polymer having disulfide linkages with an organic dimercaptan in the presence of an organic amine