Agent
Stephen P. Krupp
Agent
L. Wayne White
Grantee
The Dow Chemical Company
Primary examiner
Joseph L. Schofer
Primary examiner
David Wu
Application number
7761309
Kind
A
Document number
5272236
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Elastic substantially linear olefin polymers

5272236 - 7761309 - USPTO

Application Oct 15, 1991 - Publication Dec 21, 1993

Shih-Yaw Lai John R. Wilson George W. Knight James C. Stevens Pak-Wing S. Chum

Abstract

Substantially linear olefin polymers having a melt flow ratio, I.sub.10 /I.sub.2, .gtoreq.5.63, a molecular weight distribution, M.sub.w /M.sub.n, defined by the equation: M.sub.w /M.sub.n .ltoreq.(I.sub.10 /I.sub.2)-4.63, and a critical shear stress at onset of gross melt fracture of greater than about 4.times.10.sup.6 dyne/cm.sup.2 and their method of manufacture are disclosed. The substantially linear olefin polymers preferably have at least about 0.01 long chain branches/1000 carbons and a molecular weight distribution from about 1.5 to about 2.5. The new polymers have improved processability over conventional olefin polymers and are useful in producing fabricated articles such as fibers, films, and molded parts.

Description

Claims

Other sources for this patent

  • Tub surround

    4109426 - 7761309 - USPTO

    Application Mar 10, 1977 - Publication Aug 29, 1978

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