Stabilization of tin-coupled polymers

Details Stabilization of tin-coupled polymers Stabilization of tin-coupled polymers

1997-01-31

1998-04-14

Morgan, Krellion S.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524 92, 524 98, 524252, C08K 53495

Patent

active

057391823

ABSTRACT:
The process of this invention can be utilized to stabilize tin-coupled rubbery polymers. This process involves adding a chelating diamine to the rubbery polymer after the tin coupling has been carried out. This invention more specifically discloses a process for improving the stability of a tin-coupled rubbery polymer which comprises adding a tertiary chelating amine to the tin-coupled rubbery polymer subsequent to the time at which the tin-coupled rubbery polymer is coupled. The tertiary chelating amine will preferably be a tertiary chelating alkyl 1,2-ethylene diamine, such as N,N,N',N'-tetramethylethylenediamine.

REFERENCES:
patent: 2382792 (1945-08-01), Howland
patent: 3436370 (1969-04-01), Blumel
patent: 3770694 (1973-11-01), Berg et al.
patent: 4442250 (1984-04-01), Cantatore
patent: 5569690 (1996-10-01), Terakawa et al.

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