Coupling lithium-initiated polymer with a vinylhalomethylarene

Details Coupling lithium-initiated polymer with a vinylhalomethylarene Coupling lithium-initiated polymer with a vinylhalomethylarene

1975-12-22

1978-04-25

Hamrock, William F.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

260879, 260880B, 526 20, 526 21, 526 26, 526 46, 526182, C08F 804, C08F 826

Patent

active

040864065

ABSTRACT:
Lithium-initiated polymers are coupled with a vinylhalomethylarene such as vinylbenzyl chloride. Maximum molecular weight is obtained at about one mol of coupling agent for two mols of polymerlithium, indicating a major amount of the coupling to be in the form of about two polymerlithium entities being joined to one coupling agent. Excellent stability indicates little formation of branched polymer through carbon-lithium bonding. Consequently, the coupled polymer can be hydrogenated successfully to give a high molecular weight ozone-stable product.

REFERENCES:
patent: 3810957 (1974-05-01), Lunk
patent: 3813455 (1974-05-01), Saltman et al.
patent: 3817957 (1974-06-01), Trepha
patent: 3862098 (1975-01-01), Milkovich et al.

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