Process for introducing an additive into a polymer melt
First Claim
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1. A process comprising:
- a) introducing at least one base;
polymer into an extruder;
b) heating the base polymer to a temperature sufficient to form a polymer melt;
c) introducing into the extruder a liquid comprising water and at least one additive;
wherein the additive is an NO donating compound;
d) mixing the liquid with the polymer melt in the extruder to form a blend;
e) vaporizing at least a portion offline liquid and removing it;
from the polymer melt; and
f) extruding the additive containing polymer through an extruder die;
wherein the base polymer is selected from the group consisting of polyolefin, polyethylene polypropylene, ethylene vinyl acetate, EMA, EEA, EMAA, polybutene-1 and mixtures thereof.
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Abstract
A process includes introducing a base polymer into an extruder, heating to a temperature sufficient to form a polymer melt, introducing a liquid comprising water and at least one additive consisting of an NO donating compound with mixing and subsequent vaporization and venting of the liquid to produce an extrudate having a uniform distribution of preferably uniformly small additive particles.
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Citations
27 Claims
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1. A process comprising:
- a) introducing at least one base;
polymer into an extruder;
b) heating the base polymer to a temperature sufficient to form a polymer melt;
c) introducing into the extruder a liquid comprising water and at least one additive;
wherein the additive is an NO donating compound;
d) mixing the liquid with the polymer melt in the extruder to form a blend;
e) vaporizing at least a portion offline liquid and removing it;
from the polymer melt; and
f) extruding the additive containing polymer through an extruder die;
wherein the base polymer is selected from the group consisting of polyolefin, polyethylene polypropylene, ethylene vinyl acetate, EMA, EEA, EMAA, polybutene-1 and mixtures thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
- a) introducing at least one base;
Specification