Process for producing hydrogenated polymers

Details Process for producing hydrogenated polymers Process for producing hydrogenated polymers

2005-09-27

2005-09-27

Rabago, Roberto (Department: 1713)

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S376000, C525S374000, C525S329300, C525S383000, C525S387000, C528S482000, C528S490000, C528S492000

Reexamination Certificate

active

06949608

ABSTRACT:
The present invention relates to a process for the hydrogenation of an unsaturated polymer comprising hydrogenation of an unsaturated polymer in a reaction mixture comprising hydrazine, an oxidizing agent and a catalyst and the reduction or elimination of residual free hydrazine from the hydrogenated polymer, whereby the residual free hydrazine is reduced or eliminated from the reaction mixture by contacting it with an adsorbent and/or absorbent which is a solid material which has the ability to absorb and/or absorb hydrazine. The absorbent and/or absorbent is chosen from activated carbon, carbon black, silicates, chalk, talcum or transition metal containing solids.

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