High trans-1,4-polybutadiene and catalyst and process for prepar

Details High trans-1,4-polybutadiene and catalyst and process for prepar High trans-1,4-polybutadiene and catalyst and process for prepar

1995-05-31

1997-01-21

Teskin, Fred

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526139, 526142, 526143, 526335, 502117, 502121, 502125, C08F13606, C08F 470

Patent

active

055960537

ABSTRACT:
Diene polymers having a high content of trans-1,4 addition and two distinct melting points in the ranges of 30.degree. C. to 50.degree. C. and 70.degree. C. to 130.degree. C. are prepared by polymerizing a 1,3-diene monomer in a hydrocarbon solvent in the presence of a catalyst composition comprising (a) a carboxylated nickel oxy borate compound; (b) an orKanoaluminum compound; (c) a triaryloxy phosphorus compound and (d) a carboxylic acid preferably a fluorinated carboxylic acid. The resultant polymers are useful as additives to tire rubbers to improve processability by reducing compound Mooney viscosity and reducing the shrinkage of various compound stocks.

REFERENCES:
patent: 3910869 (1975-10-01), Throckmorton
patent: 3926933 (1975-12-01), Naylor
patent: 5037912 (1991-08-01), Patterson et al.

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