Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Reexamination Certificate
2005-05-10
2005-05-10
Choi, Ling Siu (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
C523S202000, C523S209000, C523S210000, C428S402000, C428S404000
Reexamination Certificate
active
06890973
ABSTRACT:
The syndiotactic polystyrene nanocomposite according to the present invention has nano silicate materials dispersed individually in a styrene polymer matrix by intercalation and exfoliation during polymerization. Besides, the syndiotactic polystyrene nanocomposite according to the present invention is prepared by using a catalytic system composed of a phyllosilicate-supported Group IVB transition metal catalyst and alkylaluminoxane, wherein the phyllosilicate-supported Group IVB transition metal catalyst comprises: a) a polymer, b) a phyllosilicate and c) a Group IVB transition metal compound, and the polymer (a) is used as an insulating material or media of the phyllosilicate (b) and the Group IVB transition metal compound (c).
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Ishihra, N. et al, Journal of Macromolecules,Crystalline Syndiotactic Polystyrene, 1986, 19, pp. 2464-2465.
Lim Jae Gon
Yoon Sung Cheol
Zhang Xuequan
Aamsung Atofina Co., Ltd.
Choi Ling Siu
Woodcock & Washburn LLP
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