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US 10,442,114 B2Granted
Compartmentalized resin pellets
AssigneeAPG Polytech, LLC
InventorGianluca Ferrari
Life of this patent
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Abstract
Disclosed herein is a resin pellet and a process to make said resin pellet. The resin pellet comprises a major polyester comprising a catalytic titanium compound, and a minor polyester comprising a phosphorus compound. The major polyester is present in a first compartmentalized zone of the resin pellet and the minor polyester is present in a second compartmentalized zone of the resin pellet.
Claims19
A process for maintaining the catalytic activity of a catalytic titanium compound in a polyester resin during polymerization comprising the steps of:
- A. melt phase polymerizing a first polyester comprising the catalytic titanium compound in the absence of a deactivating amount of a phosphorus compound,
- B. manufacturing a compartmentalized pellet comprising a first compartmentalized zone and a second compartmentalized zone wherein the first compartmentalized zone comprises the first polyester and the second compartmentalized zone comprises a second polyester comprising a phosphorus compound,
- C. blending the compartmentalized resin pellet into an article by melt mixing and making an article,
- wherein the amount of phosphorus from the phosphorus compound to the amount of titanium from the catalytic titanium compound in step A is in a mole ratio selected from the group consisting of at least 0.1:1.0, at least 0.2:1.0, at least 0.5:1.0, at least 0.7:1.0, and at least 1.0:1.0.
1 more element
Dependencies are inferred from the claim text.