Maleated high acid number high molecular weight polypropylene of

Details Maleated high acid number high molecular weight polypropylene of Maleated high acid number high molecular weight polypropylene of

1999-02-24

2000-04-04

Zitomer, Fred

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

Synthetic resins

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

525184, 525284, 5253337, 525387, C08F25502, C08F 846

Patent

active

060462795

ABSTRACT:
A novel, continuous process for the manufacture of novel higher molecular weight and higher acid numbered maleated polypropylenes with lower color at higher efficiencies involving specified ratios of polypropylene, maleic anhydride, and free radical initiator is described. The novel maleated polypropylenes have an acid number greater than 4.5, a yellowness index color of no greater than 76, and a number average molecular weight of at least 20,000. The process entails continuously forming an intimate mixture of molten polypropylene and molten maleic anhydride at one end of a reactor, continuously introducing a free radical initiator, and continuously removing high acid number high molecular weight maleated polypropylene of low color from the opposite end of the reactor.

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Database WPI, Week 9351, Derwent Publications Ltd., London, GB; AN 93-410862 & JP,A,05 310 817 (Toyobo KK), Nov. 22, 1993 (see abstract).
Material Safety Data Sheet (MSDS), MSDS No. P579015, Issued Oct. 15, 1993, Tradename: POLYBOND 3150, Chemical Name: Polypropylene, modified.
Journal of Applied Polymer Science, Effect of Compatibilization on the Properties of Polypropylene/Polyamide-66 (75/25 Wt/Wt) Blends, Apr. 11, 1994, pp. 195-206.
Uniroyal Product Information, POLYBOND Modified Polyolefin, Effective Date: Mar. 15, 1995.
Reactive Extrusion, Plastics Formulating and Compounding, May/Jun. 1996, pp. 33, 35, 36.

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