Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1986-03-12
1987-11-17
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
5253317, 525366, C08F 842
Patent
active
047075210
ABSTRACT:
A process is provided for metallating crystalline ethylene polymers which have polymerized therein a minor amount of at least one nonconjugated diene and, optionally, a minor amount of at least one 1-olefin. Metallation is accomplished with an alkyllithium compound and at least one activating reagent after a slurry of the copolymer in a nonreactive, saturated, nonpolar hydrocarbon solvent is first heated to a temperature greater than 80.degree. Centigrade to provide the polymer with an expanded settling volume greater than its original settling volume. Metallation may be accomplished either at that temperature or at a lower temperature following cooling of the slurry. The activating reagents include potassium alkoxides, and chelating tertiary diamines. The metallated polymers so prepared may be reacted with (a) one or more anionically polymerizable monomers to form graft polymers or (b) a reagent such as carbon dioxide to form a functionalized polymer.
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Esneault Calvin P.
Lund Gary K.
Howard D. R.
Lipman Bernard
Schofer Joseph L.
The Dow Chemical Company
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