Polychloroprene composition
AssigneeDuPont Dow Elastomers L.L.C.
InventorsLance Alan Christell, Richard Misak Tabibian
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Abstract
Crystalline polychloroprene compositions comprise mercaptan-modified or xanthogen disulfide-modified 2-chloro-1,3-butadiene homopolymers having gel contents of 5-80 percent by weight. The polymers are prepared by free radical emulsion polymerization at a temperature of 5.degree.-20.degree. C. to a conversion of 70-95 percent in the presence of 2.5.times.10.sup.-4 -5.5.times.10.sup.-4 moles of mercaptan or xanthogen disulfide modifier per mole of 2-chloro-1,3-butadiene.
Claims6
An elastomer composition which comprises a mercaptan-modified or xanthogen disulfide-modified crystalline 2-chloro-1,3-butadiene homopolymer having a gel content of 5-80 percent by weight which is prepared by free radical emulsion polymerization at a temperature of 5.degree. C.-20.degree. C., to a conversion of 70-95 percent, in the presence of 2.5.times.10.sup.-4 -5.5.times.10.sup.-4 moles of mercaptan or xanthogen disulfide modifier per mole of 2-chloro-1,3-butadiene.
Dependencies are inferred from the claim text.