Controlling the molecular weight of polybutadiene

Details Controlling the molecular weight of polybutadiene Controlling the molecular weight of polybutadiene

1995-05-11

1997-12-16

Smith, Edward J.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526137, 526133, 5263404, 526903, C08F 470, C08F 3606

Patent

active

056986432

ABSTRACT:
There is disclosed a process for the regulation of the molecular weight of a high-cis 1,4-polybutadiene prepared by polymerizing 1,3-butadiene in a solution of an aliphatic and/or cycloaliphatic or aromatic solvent system employing as a catalyst system a mixture of (1) an organonickel compound, (2) an organoaluminum compound, and (3) a fluorine containing compound selected from the group consisting of hydrogen fluoride and hydrogen fluoride complexes which are prepared by complexing hydrogen fluoride with a ketone, an aldehyde, a nitrile, a mineral acid containing oxygen, an ester, an ether, an alcohol, a phenol or water; said polymerization being conducted in the presence of small amounts of olefins selected from the group consisting of 1-butene, isobutylene, cis and trans-2-butene and allene.

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patent: 4383097 (1983-05-01), Castner et al.
Sakata et al., Die Makromolekuture Chemie 139(1970) 73-81 (No. 3333).
Sakata et al., Die Macromolekulare Chemie, 139 (1970), pp. 73-81.
Duck et al., European Patent Journal, vol. 7 (1971), pp. 55-63.

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