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US 12,643,988 B2Granted
Composition of polymers derived through the maleation of depolymerized polypropylene
AssigneeGreenMantra Recycling Technologies Ltd.
InventorsDomenic Di Mondo, Irina Fenton
Life of this patent
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Abstract
Polymers are created via the depolymerization of a polypropylene feedstock. The polymers can be modified/grafted with maleic anhydride. In some embodiments the polypropylene feedstock contains recycled or discarded polypropylene. In some embodiments, the polymers contain olefins within the polymer backbone, and/or a suspension of iron, titanium, and/or zinc.
Claims20
A composition comprising:
- a depolymerized polymer wherein said depolymerized polymer has been maleated,
- wherein said depolymerized polymer is derived from depolymerization of a polypropylene feedstock via a depolymerization process,
- wherein said polypropylene feedstock comprises recycled polypropylene,
- wherein said depolymerized polymer comprises greater than 0.25% olefin content on the backbone of the chain,
- wherein said depolymerized polymer has a weight-average molecular weight between and inclusive of 500-45,000 atomic mass units,
- wherein said depolymerized polymer has been maleated to an acid number greater than 1 mg KOH/g,
- wherein said composition further comprises greater than 25 ppm zinc.
4 more elements
A composition comprising:
- a depolymerized polymer wherein said depolymerized polymer has been maleated;
- greater than 25 ppm iron;
- greater than 25 ppm zinc;
- and
- greater than 50 ppm titanium,
- wherein said depolymerized polymer is derived from depolymerization of a polypropylene feedstock via a depolymerization process,
- wherein said polypropylene feedstock comprises recycled polypropylene,
- wherein said depolymerized polymer has a weight-average molecular weight between and inclusive of 500-45,000 atomic mass units,
- wherein said depolymerized polymer has been maleated to an acid number greater than 1 mg KOH/g.
6 more elements
A composition comprising:
- a depolymerized polymer wherein said depolymerized polymer has been maleated,
- wherein said depolymerized polymer is derived from depolymerization of a polypropylene feedstock via a depolymerization process,
- wherein said polypropylene feedstock comprises recycled polypropylene,
- wherein said depolymerized polymer comprises greater than 0.25% olefin content on the backbone of the chain,
- wherein said depolymerized polymer has a weight-average molecular weight between and inclusive of 500-45,000 atomic mass units,
- wherein said depolymerized polymer has been maleated to an acid number greater than 1 mg KOH/g,
- wherein said composition further comprises greater than 50 ppm titanium.
4 more elements
A composition comprising:
- a depolymerized polymer wherein said depolymerized polymer has been maleated,
- wherein said depolymerized polymer is derived from depolymerization of a polypropylene feedstock via a depolymerization process,
- wherein said polypropylene feedstock comprises recycled polypropylene,
- wherein said depolymerized polymer comprises greater than 0.25% olefin content on the backbone of the chain,
- wherein said depolymerized polymer has a weight-average molecular weight between and inclusive of 500-45,000 atomic mass units,
- wherein said depolymerized polymer has been maleated to an acid number greater than 1 mg KOH/g,
- wherein said composition further comprises greater than 25 ppm iron.
4 more elements
A composition comprising:
- a depolymerized polymer wherein said depolymerized polymer has been maleated,
- wherein said depolymerized polymer is derived from depolymerization of a polypropylene feedstock via a depolymerization process,
- wherein said polypropylene feedstock comprises recycled polypropylene,
- wherein said depolymerized polymer comprises greater than 0.25% olefin content on the backbone of the chain,
- wherein said depolymerized polymer has a weight-average molecular weight between and inclusive of 500-45,000 atomic mass units,
- wherein said depolymerized polymer has been maleated to an acid number greater than 1 mg KOH/g,
- wherein said depolymerized polymer comprises at least one grafted succinate group.
4 more elements
Dependencies are inferred from the claim text.