Stereoregular cyclopolymers and method

Details Stereoregular cyclopolymers and method Stereoregular cyclopolymers and method

1991-10-07

1993-05-04

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

502117, 526160, 526308, 526335, 5263402, 5263403, 526336, C08F 3620

Patent

active

052083047

ABSTRACT:
Homogeneous catalyst systems are provided for cyclopolymerization of diolefins, particularly 1,5-hexadiene, which control the stereochemistry, microstructure, and physical properties of the polymers synthesized. The systems comprise homogeneous Ziegler-Natta catalysts based on group 4 metallocenes and methylalumoxane. The cyclopolymers synthesized exhibit different degrees of stereoregularity, which is a function of the polymerization conditions. In addition, the polyolefins can be chiral and optically active. The polymers produced are of high molecular weight and highly flexible.

REFERENCES:
patent: 3357961 (1967-12-01), Makowski et al.
patent: 3435020 (1969-03-01), Olson
patent: 3472830 (1969-10-01), Baxter et al.
patent: 4360551 (1982-11-01), Guarino
patent: 4391738 (1983-07-01), Langer
patent: 4404344 (1983-09-01), Sinn
patent: 4769510 (1988-09-01), Kaminsky
patent: 4794096 (1988-12-01), Ewen
patent: 4808561 (1989-02-01), Welborn
patent: 4897455 (1990-01-01), Welborn
patent: 4931526 (1990-06-01), Yoshitake et al.
Marvel et al., J. Am. Chem. Soc., 1958, 80, 1970.
Makowski et al., J. Polymer Sci, Part A, Z, 1549, 1964.
Resconi and Waymouth, "Diastereoselectivity in the Homogeneous Cyclopolymerization of 1,5-Hexadiene", J. of Am. Chem. Soc., 112, 4953-4954 (1990).
Coates and Waymouth, "Enantioselective Cyclopolymerization: Optically Active Poly(methylene-1,3-cyclopentane)", J. of Am. Chem. Soc., 113, 6270-6271 (1991).
Arcus, "The Stereoisomerism of Addition Polymers. Part I. The Stereochemistry of Addition and Configurations of Maximum Order," J. Amer. Chem. Soc., 1955, pp. 2801-2806.
Marvel et al., "Intermolecular Intramolecular Polymerization of .alpha.-Olefins by Metal Alkyl Coordination Catalysts", J. Am. Chem. Soc., 80, Apr.-Jun. 1958, pp. 1740-1744.
Makowski et al., "1,5-Hexadiene Polymers. I. Structure and Properties of Poly-1,5-Hexadiene", J. Polymer Sci.: Part A, vol. 2, 1964, pp. 1549-1566.
Schleyer et al., "The Evaluation of Strain in Hydrocarbons. The Strain in Adamantane and Its Origin", J. Am. Chem. Soc., 92:8, Apr. 22, 1970, pp. 2377-2386.
Ewen, "Mechanisms of Stereochemical Control in Propylene Polymerizations with Soluble Group 4B Metallocene/Methylalumoxane Catalysts", J. Am. Chem. Soc., 106, 194, pp. 6355-6364.
Kaminsky et al., "Polymerization of Propene and Butene with a Chiral Zirocene and Methylalumoxane as Catalyst", Angew. Chem. Int. Ed. Engl., 24:6, 1965, pp. 507-508.
Farina, "The Stereochemistry of Linear Macromolecules", Top. Stereochem., 17, 1987, pp. 1-111.
Cheng and Khasat, ".sup.13 C-NMR Characterization of Poly(1,5-hexadiene)", J. Appl. Polymer Sci., vol. 35, 1988, pp. 825-829.
Ewen et al., "Syndiospecific Propylene Polymerization with Group 4 Metallocenes", J. Am. Chem. Soc., 110, 1988, pp. 6255-6256.

Affiliated with

Also associated with

Rating

Stereoregular cyclopolymers and method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Stereoregular cyclopolymers and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stereoregular cyclopolymers and method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1975863