Process for preparing conjugated diene butyl

Details Process for preparing conjugated diene butyl Process for preparing conjugated diene butyl

1975-11-13

1978-01-10

Henderson, Christopher A.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526 17, 526 18, 526 481, 528480, 528486, 528487, 528488, C08F 826

Patent

active

040680517

ABSTRACT:
Improved processes for the dehydrohalogenation of halogenated butyl rubber in order to prepare a butyl rubber having randomly distributed sites of conjugated unsaturation are disclosed. Such processes, which include the contacting of a solution of halogenated butyl rubber with a soluble metal carboxylate, a soluble carboxylic acid, and an oxide or hydroxide of a metal selected from Groups Ia and IIa of the Periodic Table, are carried out in a reaction zone which is maintained substantially free of free water vapor. Preferably, excess amounts of hydrophilic reagents are added to the reaction zone or in the alternative the reaction zone is purged with a drying gas.

REFERENCES:
patent: 3775387 (1973-11-01), Baldwin
patent: 3816371 (1974-06-01), Baldwin
patent: 3852253 (1974-12-01), Malatesta

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