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
2008-05-06
2008-05-06
Teskin, Fred (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C525S245000, C525S269000, C525S309000, C525S338000, C525S940000
Reexamination Certificate
active
07368508
ABSTRACT:
The present invention relates to novel functional norbornenes as initiators for radical polymerization, its polymer and a process for producing the same. More particularly, the novel functional norbornenes can be selectively polymerized by ring-opening metathesis polymerization or radical polymerization to obtain various polynorbornene derivatives or grafted copolymer materials. The polynorbornene derivatives and grafted copolymer materials not only exhibit excellent functional properties but also enhanced physical and chemical properties after modification. The polynorbornene derivatives and grafted copolymer materials disclosed in the present invention exhibit excellent heat resistance, transparency and water resistance. The present invention also deals with a process for producing such derivatives and materials having controllable molecular weight with narrow molecular weight distribution.
REFERENCES:
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Elyashiv-Barad, et al, Copolymerization of Methyl Acrylate with Norbornene Derivatives by Atom Transfer Radical Polymerization, Macromolecules, 2002, 35, 7521-7526.
Li, et al, Synthesis of Comb Graft Copolymers I- Ring-opening Metathesis Polymerization of Norbornyl-polymethacrylate by a Supported Ruthenium Carbene Complex Generated In Situ, Polym. Adv. Technol., 14, 226-231 (2003).
Der-Jang Liaw and Ching-Cheng Huang, “Preparation of New Diblock Polymeric Materials With Carbazole Groups Derived From The Combination of Living Ring-Opening Metathesis Polymerization and Atom Transfer Radical Polymerization,” Polymer Preprints 2003, 44(1), pp. 945-946.
Yeonsuk Roh and Nathan L. Bauld, “Block and Random Living, Ring-Opening Metathesis Copolymerization of Functionally Differentiated Carbazole-Containing Norbornene Monomers,” Adv. Synth. Catal. 2002, 344, No. 2, pp. 192-199.
Huang Ching-Cheng
Ju Jing-Yang
Liaw Der-Jang
Liaw Jiun-Tyng
Birch & Stewart Kolasch & Birch, LLP
National Taiwan University of Science & Technology
Teskin Fred
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