Methods for improving production in gas phase polymerization
US-12152095-B2 · Nov 26, 2024 · US
Bimodal molecular weight low ethylene content propylene-based random copolymer compositions and methods
US2025340687A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2025340687-A1 |
| Application number | US-202319115210-A |
| Country | US |
| Kind code | A1 |
| Filing date | Oct 3, 2023 |
| Priority date | Oct 14, 2022 |
| Publication date | Nov 6, 2025 |
| Grant date | — |
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Abstract
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Compositions, methods, and molded articles including a bimodal molecular weight ethylene/propylene random copolymer comprising a high molecular weight component having a melt flow rate at 230° C. of from about 0.02 g/10 min to about 0.5 g/10 min and a low molecular weight component having a melt flow rate at 230° C. of from about 1 g/10 min to about 10 g/10 min, and an ethylene content of from about 0.40 wt. % to about 0.60 wt. %.
First claim
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What is claimed is: 1 . A composition comprising: a bimodal molecular weight ethylene/propylene random copolymer comprising a high molecular weight component having a melt flow rate at 230° C. of from about 0.02 g/10 min to about 0.5 g/10 min and a low molecular weight component having a melt flow rate at 230° C. of from about 1 g/10 min to about 10 g/10 min, and an ethylene content of from about 0.40 wt. % to about 0.60 wt. %. 2 . The composition of claim 1 , wherein the composition has a flexural modulus of from about 240 kpsi to about 280 kpsi. 3 . The composition of claim 1 , wherein the composition has a tensile strength of from about 5200 psi to about 5700 psi. 4 . The composition of claim 1 , wherein the composition has a plaque haze value of from about 20% to about 35% based on a 1 mm thickness sample. 5 . The composition of claim 1 , wherein the composition has a molecular weight of from about 300 kg/mol to about 700 kg/mol. 6 . The composition of claim 1 , wherein the composition has a melt temperature of from about 150° C. to about 170° C. 7 . The composition of claim 1 , wherein the composition has a crystallinity temperature of from about 100° C. to about 130° C. 8 . The composition of claim 1 , wherein the composition has a molecular weight distribution of from about 5 to about 20. 9 . The composition of claim 1 , wherein the composition has a Notched Izod impact value at 23° C. of from about 0.5 ft-lb/inch to about 1 ft-lb/inch. 10 . A method comprising: polymerizing ethylene and propylene monomers to produce a bimodal molecular weight ethylene/propylene random copolymer comprising a high molecular weight component have a melt flow rate at 230° C. of from about 0.02 g/10 min to about 0.5 g/10 min and a low molecular weight component having a melt flow rate at 230° C. of from about 1 g/10 min to about 10 g/10 min, and an ethylene content of from about 0.40 wt. % to about 0.60 wt. %. 11 . The method of claim 10 , wherein the bimodal molecular weight ethylene/propylene random copolymer has a flexural modulus of from about 240 kpsi to about 280 kpsi. 12 . The method of claim 10 , wherein the bimodal molecular weight ethylene/propylene random copolymer has a tensile strength of from about 5200 psi to about 5700 psi. 13 . The method of claim 10 , wherein the bimodal molecular weight ethylene/propylene random copolymer has a plaque haze value of from about 20% to about 35% based on a 1 mm thickness sample. 14 . The method of claim 10 , wherein the bimodal molecular weight ethylene/propylene random copolymer has a melt temperature of from about 150° C. to about 170° C. 15 . The method of claim 10 , wherein the bimodal molecular weight ethylene/propylene random copolymer has a crystallinity temperature of from about 100° C. to about 130° C. 16 . The method of claim 10 , wherein the bimodal molecular weight ethylene/propylene random copolymer has molecular weight of from about 300 kg/mol to about 700 kg/mol. 17 . The method of claim 10 , wherein the bimodal molecular weight ethylene/propylene random copolymer the composition has a molecular weight distribution of from about 5 to about 20. 18 . The method of claim 10 , wherein the bimodal molecular weight ethylene/propylene random copolymer has a Notched Izod impact value at 23° C. of from about 0.5 ft-lb/inch to about 1 ft-lb/inch. 19 . A molded article comprising a bimodal molecular weight ethylene/propylene random copolymer comprising a high molecular weight component having a melt flow rate at 230° C. of from about 0.02 g/10 min to about 0.5 g/10 min and a low molecular weight component having a melt flow rate at 230° C. of from about 1 g/10 min to about 10 g/10 min, and an ethylene content of from about 0.40 wt. % to about 0.60 wt. %. 20 . The molded article of claim 19 , wherein the molded article is a packaging product.
Assignees
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Classifications
as weight or mass percentages · CPC title
Crystallisation aids · CPC title
containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure · CPC title
- C08F210/06Primary
Propene · CPC title
- C08L23/10Primary
Homopolymers or copolymers of propene · CPC title
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- What does patent US2025340687A1 cover?
- Compositions, methods, and molded articles including a bimodal molecular weight ethylene/propylene random copolymer comprising a high molecular weight component having a melt flow rate at 230° C. of from about 0.02 g/10 min to about 0.5 g/10 min and a low molecular weight component having a melt flow rate at 230° C. of from about 1 g/10 min to about 10 g/10 min, and an ethylene content of from …
- Who is the assignee on this patent?
- Exxonmobil Chemical Patents Inc
- What technology area does this patent fall under?
- Primary CPC classification C08F210/06. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Nov 06 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).