Polypropylene waxes modified so as to be polar

Details Polypropylene waxes modified so as to be polar Polypropylene waxes modified so as to be polar

1997-11-24

1999-12-07

Dawson, Robert

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525263, 525386, 525387, C08F26502

Patent

active

05998547&

ABSTRACT:
The present invention relates to partially crystalline polypropylene homopolymer or copolymer waxes modified so as to be polar and having an acid or saponification number of from 0.5 to 120 mg KOH/g, a melt viscosity of from 20 to 50,000 mPa.s/170.degree. C. and a softening point (ring/ball) of from 90 to 165.degree. C., prepared by reacting a nonpolar polypropylene homopolymer or copolymer wax with an .alpha.,.beta.-unsaturated carboxylic acid or a derivative thereof in the presence of free-radical formers, wherein the nonpolar polypropylene wax has been prepared by direct polymerization of propylene or copolymerization of propylene with higher 1-olefins using catalysts of Ziegler or metallocene type and has a softening point (ring/ball) of from 90 to 165.degree. C.
The waxes are useful as plastics additives, for aqueous dispersions or for melt adhesive formulations.

REFERENCES:
patent: 3480580 (1969-11-01), Joyner
patent: 3481910 (1969-12-01), Brunson
patent: 4041056 (1977-08-01), Heintzelman
patent: 4159287 (1979-06-01), Ames
patent: 5290954 (1994-03-01), Roberts
patent: 5384375 (1995-01-01), Roberts
patent: 5451639 (1995-09-01), Marczinke et al.
Chem. Abstract vol. 65 (1966) Improvements in coating polyolefin objects.
International Search Report for PCT/EP/9706415 (1997).
Derwent Patent Family Report (1997).

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