John H Johnson
Electrician in Wilmington, DE
License number
Delaware TH-0006808
Issued Date
Dec 28, 2012
Expiration Date
Dec 28, 2013
Category
Electrical Examiners
Type
Homeowner's Permit
Address
Address
2
Wilmington, DE 19810
Professional information
Process For Making Low Crystallinity Polyolefins
US Patent:
4540756, Sep 10, 1985
Filed:
May 21, 1984
Appl. No.:
6/612489
Inventors:
John H. Johnson - Wilmington DE
Assignee:
Hercules Incorporated - Wilmington DE
International Classification:
C08F 444, C01F 1100
US Classification:
526124
Abstract:
Disclosed is a solution polymerization process for obtaining high yields of high molecular weight, low crystallinity polymers of propylene and higher 1-olefins at low catalyst levels. The polymerization is carried out using a catalyst system containing a soluble transition metal component derived from magnesium carboxylate and a salt of titanium, zirconium or hafnium, and specified alkyl aluminum halide activators.