Process for polymerizing conjugated dienes with lithium-tin-nitr

Details Process for polymerizing conjugated dienes with lithium-tin-nitr Process for polymerizing conjugated dienes with lithium-tin-nitr

1994-03-25

1995-10-31

Zitomer, Fred

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526180, 526217, 526221, 526236, 526335, 526340, C08F 448, C08F 458, C08F 3606

Patent

active

054630045

ABSTRACT:
A method for preparing a polymer having low hysteresis loss value, good breaking properties and good processability with good productivity is provided by adding a tin compound during the propagation step of polymerization of a conjugated diene and/or an aromatic vinyl hydrocarbon. Polymers produced in accordance with this method have high molecular weight and star-shaped structures with branches having the same or different molecular weight.

REFERENCES:
patent: 3426006 (1969-02-01), Nutzel
patent: 3935177 (1976-01-01), Muller
patent: 4397994 (1983-08-01), Takeuchi
patent: 5268439 (1993-12-01), Hergenrother

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