发明授权
US3668254A N-HALOALLYL-p-PHENYLENEDIAMINES 失效
N-对羟基对苯二胺

N-HALOALLYL-p-PHENYLENEDIAMINES
摘要:
A para-phenylenediamine of the formula

WHEREIN R1, R2 and R3 are hydrogen or halogen, at least one being halogen, useful for the preservation of rubber.
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