Post-reactor stabilization of polyolefins

Details Post-reactor stabilization of polyolefins Post-reactor stabilization of polyolefins

1989-04-03

1990-10-02

Pianalto, Bernard

Coating processes

Particles, flakes, or granules coated or encapsulated

Resin base

427316, 4273855, 4273935, 427416, 4274192, 4274197, 427424, 427425, 427427, B05D 700

Patent

active

049606174

ABSTRACT:
The present invention includes a coated polyolefin particle and a method for post-reactor stabilization of polyolefins comprising:
melting a polyolefin wax;
blending at least one additive into the liquid polyolefin wax;
fluidizing polyolefin particles to be stabilized with a hot gas;
spraying the liquid polyolefin wax containing at least one additive on the fluidized polyolefin particles, and forming at least partially coated polymer particles;
maintaining the at least partially coated polymer particles and fluidized polyolefin particles at a temperature which is sufficiently high to prevent the formation of fibers from the wax and which enhances the formation of stabilized polymer particles.

REFERENCES:
patent: 3271185 (1966-09-01), Pollock
patent: 3546150 (1970-12-01), White et al.
patent: 3591409 (1971-07-01), Aubrey et al.
patent: 3971749 (1976-07-01), Blunt
patent: 4452928 (1984-06-01), Trischman et al.
patent: 4517246 (1985-05-01), Matsuyama et al.
H. S. Hall & R. E. Pondell, Chapter 7, "Controlled Release Technologies: Methods, Theory & Applications", vol. II, A. F. Kydonieus.

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