Inverse phase polymerization

Details Inverse phase polymerization Inverse phase polymerization

Category

C - Chemistry, Metallurgy

Subcategory

08

Subsubcategory

F

CPC

400/6414

IPC codes

C08F 295/00 (2006.01) C08F 2/06 (2006.01) C08F 36/04 (2006.01) C08F 36/06 (2006.01)

Type

Patent

Patent number

CA 1337886

Description

It is sometimes advantageous to disperse crystalline polymers throughout rubbery elastomers. For instance, the cold flow characteristics and green strength of polydiene rubbers can be improved by dispersing syndiotactic-1,2-polybutadiene therein. This invention discloses a process for preparing a highly dispersed blend of a crystalline polymer in a rubbery elastomer which comprises (1) polymerizing at least one diene monomer in an organic solvent under solution polymerization conditions to form a polymer cement of the rubbery elastomer in the organic solvent, (2) polymerizing additional monomers in the polymer cement into the crystalline polymer to form a rubbery cement having the crystalline polymer dispersed therein, and (3) recovering the highly dispersed blend of the crystalline polymer in the rubbery elastomer from the organic solvent in the rubber cement.

Application Number

592979

Affiliated with

Also associated with

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