Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Treating polymer containing material or treating a solid...
Reexamination Certificate
2008-06-26
2011-11-15
Boykin, Terressa (Department: 1765)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Treating polymer containing material or treating a solid...
C203S045000, C525S054000, C525S355000, C525S356000, C525S359100
Reexamination Certificate
active
08058389
ABSTRACT:
Brominated polybutadiene polymers are recovered from a bromination reaction solution by forming the solution into droplets, thermally stripping the solvent from the droplets, and then washing the resulting particles. The washed particles are then recovered from the washing liquid. The droplets can be dispersed into a gaseous medium such as air and then transferred into a nonsolvent liquid for washing, or can be formed directly into the nonsolvent liquid. The process forms a particulate polymer material that is easily filterable and has low levels of volatile impurities and inorganic salts. Brominated polybutadiene polymers recovered in this manner are often very thermally stable.
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Greminger Douglas C.
Leng Ronald B.
Patel Avani M.
Scherzer Brian D.
Wetters Derrick G.
Boykin Terressa
Cohn PLLC Gary C.
Dow Global Technologies LLC.
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