Highly crystalline propylene homopolymers

Details Highly crystalline propylene homopolymers Highly crystalline propylene homopolymers

2006-04-04

2006-04-04

Lu, Caixia (Department: 1713)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S124500, C526S124600, C502S115000, C502S116000, C502S120000, C502S125000, C502S133000, C502S134000

Reexamination Certificate

active

07022795

ABSTRACT:
Propylene homopolymers, wherein, in their separation according to tacticity by first dissolving the polymers in boiling xylene, then cooling the solution to 25° C. at a cooling rate of 10° C./h and then, with ascending temperature, separating the propylene homopolymers into fractions of different tacticity, either one or more of the conditions thati) the fraction of propylene homopolymers which remains undissolved on heating the cooled propylene homopolymer solution to 112° C. is greater than 20% by weight orii) the fraction of propylene homopolymers which remains undissolved on heating the cooled propylene homopolymer solution to 117° C. is greater than 8% by weight oriii) the fraction of propylene homopolymers which remains undissolved on heating the cooled propylene homopolymer solution to 122° C. is greater than 1% by weight,are satisfied.

REFERENCES:
patent: 4857613 (1989-08-01), Zolk et al.
patent: 5244854 (1993-09-01), Noristi et al.
patent: 5288824 (1994-02-01), Kerth et al.
patent: 4242486 (1992-12-01), None
patent: 42 15 548 (1993-11-01), None
patent: 195 17 716 (1995-12-01), None
patent: 171 200 (1986-02-01), None
patent: 497 590 (1992-08-01), None
patent: 657 477 (1995-06-01), None
patent: 712 869 (1996-05-01), None
patent: 761 696 (1997-03-01), None
patent: 812 861 (1997-12-01), None
patent: 829 490 (1998-03-01), None
patent: 2 111 066 (1983-06-01), None
patent: 07-25946 (1995-01-01), None
BASF OZ 0050/47310.
Makromol. Chem. 178, 2335-2349 (1977).

Affiliated with

Also associated with

Rating

Highly crystalline propylene homopolymers does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3546671