Poly-.alpha.-olefins

Details Poly-.alpha.-olefins Poly-.alpha.-olefins

1991-12-23

1993-02-16

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526160, 5263482, 5263483, 5263485, C08F11008, C08F11014

Patent

active

051872501

ABSTRACT:
A poly-.alpha.-olefin of novel structure which is an addition polymer of an .alpha.-olefin having 4 carbon atoms or more, wherein (a) by the analysis of the peaks attributable to the side chain methylene groups directly bonded to the main chain in the .sup.13 C-NMR spectrum produced by the measurement in 1,2,4-trichloro-benzene, (i) a novel main peak not attributable to the isotactic structure thereof is positioned on the side of higher magnetic field than is the peak attributable to the isotactic structure, and (ii) the intensity of said main peak is 0.3 or more relative to the sum of the intensities of the total peaks attributable to the side chain methylene groups directly bonded to the main chain, and (b) the molecular weight measured by gel permeation chromatography and calculated as polypropylene is not less than 1,000.

REFERENCES:
patent: 4892851 (1990-01-01), Ewen et al.
Journal Of The American Chemical Society, vol. 110, 1988, pp. 6255-6256, American Chemical Society; J. A. Ewen et al.

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