Polymer finishing process

Details Polymer finishing process Polymer finishing process

C - Chemistry, Metallurgy

08

F

C08F 6/02 (2006.01) C08K 13/02 (2006.01)

Patent

CA 2112448

- 35 - A finishing process for a polymer containing an active catalyst residue comprising the following steps: (i) introducing one or more ethylenically unsaturated monomers, a transition metal catalyst system, and, optionally, hydrogen into one or more reaction zones in such amounts and under such polymerization conditions that a polymer will be produced having a crystallinity of less than about 10 percent by weight; (ii) maintaining the reaction zone(s) at a temperature below the sticking temperature of the polymer and in an essentially oxygen-free atmosphere; (iii) introducing into the reaction zone(s) (a) 2,6-di-tert-butyl-4-alkyl phenol and/or alkyl-3- (3-5-di-tert-butyl-4-hydroxy phenyl)-propionate wherein the alkyl group has 1 to 20 carbon atoms and is linear or branched chain, or a complex thereof, and (b) zinc oxide; a hydrotalcite containing magnesium, aluminum, and/or zinc cation(s); or a zeolite containing sodium, calcium, magnesium and/or zinc cation(s) in sufficient amounts to stabilize the polymer and neutralize acid formed in the post-reaction zone(s); (iv) recovering the polymer from the reaction zone(s) and passing the polymer into one or more post-reaction dry-blending zones, said zone(s) being maintained at a temperature below the sticking - 36 - temperature of the polymer and in an essentially oxygen-free atmosphere; (v) contacting the polymer with water in an amount sufficient to hydrolyze any catalyst residue and liberate complexed phenolic compound(s); (vi) introducing into the post-reaction zone(s), one or more catalyst deactivator compounds in an amount sufficient to essentially deactivate the hydrolyzed residue of the transition metal catalyst system; and (vii) introducing into the post-reaction zone(s), one or more thermal and/or photo-oxidation stabilizers in an amount sufficient to substantially prevent the thermal and photo-oxidation of the polymer.

Affiliated with

Also associated with

Rating

Polymer finishing process does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Polymer finishing process, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polymer finishing process will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1645612