Polypropylene compositions

Details Polypropylene compositions Polypropylene compositions

1978-09-01

1981-02-17

Marquis, Melvyn I.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 4575W, C08K 322

Patent

active

042514070

ABSTRACT:
Polypropylene which contains residues of Ziegler catalysts, and especially crystalline polypropylene which contains significant amounts of low molecular weight or atactic polymer, is improved by addition of a very low concentration of finely divided zinc oxide. Such zinc oxide not only acts as acid acceptor, making it possible to omit the conventional calcium stearate acid acceptor, but also interferes with migration of atactic and low molecular weight polymer to the surface, thus preventing plate-out of such material on processing equipment. In the thermal processing of polyproplene compositions containing metal stearate as acid acceptor or organic stearates as antistatic additives, the presence of such zinc oxide in the composition prevents plate-out on processing equipment and improves corrosivity of the compositions; it does not eliminate the antistatic effect.

REFERENCES:
patent: 3111499 (1963-11-01), Hewck et al.
patent: 3238163 (1966-03-01), O'Neill et al.
patent: 3376250 (1968-04-01), Newland
patent: 3462389 (1969-08-01), Schulde et al.
patent: 3745142 (1973-07-01), Mahlman

Affiliated with

Also associated with

Rating

Polypropylene compositions does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2261591