2001080-A is referenced by 6 patents.

A fractionable, elastic polypropylene has an inherent viscosity of 1.5 to 9, exhibits no yield point, a tensile set not exceeding 150% and contains 10 to 80% by weight of a diethyl ether- soluble fraction having an inherent viscosity exceeding 1.50 by weight and exhibits birefringence when a film formed from the fraction is viewed under crossed Nicol prisms in a polarising microscope at about 25 DEG C. The fractionable polypropylene and the diethyl ether-soluble fraction are each useful elastomeric materials. The polypropylene is prepared by polymerisation in the presence of hydrogen and as catalyst the reaction product of a partially hydrated metal oxide and a compound of the formula (RCH2)4M where M is Ti, 2r or Hf and R is an aryl or alkyl group, containing no hydrogen atom on the carbon atom bonded to the CH2 group, or a trialkyl silyl group.

Title
Elastomeric polypropylene and process for its production
Application Number
GB19780029594 19780712
Publication Number
2001080 (A)
Application Date
July 12, 1978
Publication Date
January 24, 1979
Assignee
Du Pont
IPC
C08F 04/76
C08F 110/06
C08L 101/00
C08L 23/00
C08L 21/00
C08L 07/00
C08F 110/00
C08F 10/00
C08F 08/00
C08F 04/00
C08F 210/00
C08L 101/00
C08L 23/12
C08L 23/10
C08L 23/00
C08L 21/00
C08L 07/00
C08F 210/16
C08F 110/06
C08F 10/06
C08F 10/00
C08F 08/00
C08F 04/42
C08F 04/00
C08F 210/06
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