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US 3,943,143 AGranted
Oxazolidine and thiazolidine derived carbodithioate compositions useful as vulcanization accelerators
AssigneePennwalt Corporation
InventorsIvan Christoff Popoff, Paul Gordon Haines
Life of this patent
Estimating the term…
Abstract
Oxazolidine and thiazolidinecarbodithioates, and pyridine adducts thereof, are accelerators for the vulcanization of EPDM elastomers, wherein they exhibit non-blooming characteristics.
Claims12
A compound of the structure ##SPC27##
- where X is sulfur or oxygen, R, R.sup.1, R.sup.2 and R.sup.3 are independently selected from the group consisting of hydrogen, lower alkyl having from 1 to 8 carbon atoms, CCl.sub.3, phenyl and substituted phenyl wherein there are not more than two substituents selected from the group consisting of NR.sup.4 R.sup.5, OH, OR.sup.6 and Cl wherein R.sup.4 and R.sup.5 are independently selected from the group consisting of hydrogen and methyl, R.sup.6 is a lower alkyl having from 1 to 8 carbon atoms, not more than one of R and R.sup.1 is phenyl and not more than one of R.sup.2 and R.sup.3 is phenyl;
- M is selected from the group consisting of Zn, Cd, Cu and Fe;
- and y is an integer of 1 to 3 corresponding to the valency of M.
Dependencies are inferred from the claim text.