Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1983-06-06
1985-06-11
Smith, Edward J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
526160, 526351, C08F11006, C08F 464
Patent
active
045229821
ABSTRACT:
Isotactic-stereoblock polypropylene comprising recurring polypropylene units, said isotactic-stereoblock polypropylene characterized by comprising alternating blocks of monomers having an average block length greater than 2 having methine carbons with the same relative configuration and wherein the methine carbon atoms in adjacent blocks are of opposite configuration.
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patent: 3258455 (1966-06-01), Nolta et al.
patent: 3303177 (1967-02-01), Nolta et al.
patent: 4404344 (1983-09-01), Sinn et al.
Sinn et al., Advances in Organometallic Chemistry, vol. 18, (1980), pp. 137-143.
John A. Ewen, "Mechanisms of Stereochemical Control in Propylene Polymerizations with Soluble Group 4B Metallocene/Methylalumoxane Catalysts", 1984, pp. 6355-6364, J. Am. Chem. Soc., 106.
Lynn W. Jelinski, "Modern NMR Spectroscopy", Nov. 5, 1984, pp. 26-46, Chemical & Engineering News.
Jens Herwig and Walter Kaminsky, "Halogen-Free Soluble Ziegler Catalysts with Methylalumoxan as Catalyst", Polymer Bulletin 9, 464-469, (1983).
Exxon Research & Engineering Co.
Kurtzman M. B.
Smith Edward J.
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