Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
2007-11-06
2007-11-06
Buttner, David J. (Department: 1712)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C528S393000, C528S420000
Reexamination Certificate
active
10524926
ABSTRACT:
The present invention provides a method of forming comb or star copolymers. The comb or star copolymers are useful in surface modification of thermoplastic materials or as surfactants. The method is aimed at attaching a polymeric side chain differing in polarity and chemical structure from the backbone and forming a comb or star copolymer structure. In particular the process comprises polymerizing in a first step a polymer backbone from epoxy and nitroxylether group containing monomers and in a second step polymerizing under controlled radical conditions a comb or star structure onto this backbone. The epoxy group containing monomers are for example of the formula (II)
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S. Kobatake et al., Macromolecules, (1997), vol. 30, pp. 4238-4242.
Fink Jochen
Fuso Francesco
Pfaendner Rudolf
Wunderlich-Wippert Wiebke
Buttner David J.
Ciba Specialty Chemicals Corp.
Stevenson Tyler A.
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