Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Treating polymer containing material or treating a solid...
Reexamination Certificate
2005-01-25
2005-01-25
Wu, David W. (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Treating polymer containing material or treating a solid...
C528S490000, C524S502000, C524S450000, C525S407000
Reexamination Certificate
active
06846902
ABSTRACT:
The invention relates to a process for trapping a free monomer which has not reacted by copolymerization or by grafting comprising at least one epoxide functional group in a thermoplastic composition based on ethylene and/or on propylene and based on at least one monomer comprising at least one epoxide functional group. The process can comprise the following stages: (i) preparation of the thermoplastic composition; and (ii) addition of a sufficient amount of a solid trapping additive exhibiting, at its surface, sites with a basic nature within the Lewis or Brönstead meaning. The trapping additive comprises a porous zeolite, the diameter of the pores of which is between 5 and 15 angströms, preferably between 6 and 13 angströms. The invention also relates to the composition obtained by such a process and to the blends comprising such a composition.
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French Search Report dated Jun. 17, 2002 for Application No. FR0113106.
Atofina S.A.
Hu Henry S.
Hunton & Williams LLP
Wu David W.
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