Composition comprising heterophasic propylene copolymer
US-10208194-B2 · Feb 19, 2019 · US
Heterophasic copolymers and polymerization methods
US11034827B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11034827-B2 |
| Application number | US-201916379372-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 9, 2019 |
| Priority date | Apr 12, 2018 |
| Publication date | Jun 15, 2021 |
| Grant date | Jun 15, 2021 |
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Abstract
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Heterophasic copolymers of propylene and an alpha olefin comonomer having a matrix phase and a fill phase, particularly, a heterophasic copolymer having a high fill phase content (greater than or equal to 50%), are provided herein. Polymerization methods and catalyst systems for producing such heterophasic copolymers are also provided.
First claim
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The invention claimed is: 1. A heterophasic copolymer comprising: 1) a matrix phase having a melting point of at least 100° C. and comprising: (i) at least 95 mol % propylene-derived units; or (ii) at least 95 mol % ethylene-derived units; and wherein the matrix phase is a structure having open pores and an average granule border of up to 3 μm and wherein the matrix phase comprises at least 8 wt % of the heterophasic copolymer, based on the total weight of the matrix and fill phases; and 2) a fill phase present as domains at least partially filling pores in the matrix phase, wherein the fill phase comprises: (i) at least 60 mol % propylene-derived units and at least 5 mol % ethylene-derived units; or (ii) at least 60 mol % ethylene-derived units and at least 5 mol % propylene-derived units; and 3) the heterophasic copolymer having a 2nd melt heat of fusion less than or equal to 85 J/g for propylene based fill phase and 120 J/g for ethylene based fill phase for the entire heterophasic polymer, wherein the domains have an average area of 0.5 to 20 μm 2 , and wherein the fill phase comprises at least 60 wt % of the heterophasic copolymer, based on the total weight of the matrix and fill phases, and the heterophasic copolymer having reactor made granules with at least 90 wt % of the granules having particle sizes distributed in a range of 100 to 6000 μm. 2. The heterophasic copolymer of claim 1 , wherein the granules of the copolymer have an average particle size of 1 mm to 4 mm. 3. The heterophasic copolymer of claim 1 , wherein the matrix phase comprises: (i) 95 to 100 mol % propylene-derived units and 0 to 5 mol % ethylene-derived units; or (ii) 95 to 100 mol % ethylene-derived units and 0 to 5 mol % C 4 -C 10 alpha olefin-derived units. 4. The heterophasic copolymer of claim 1 , wherein the fill phase comprises: (i) 60 to 95 mol % propylene-derived units and 5 to 40 mol % ethylene-derived units; or (ii) 60 to 95 mol % ethylene-derived units and 5 to 40 mol % propylene-derived units. 5. The heterophasic copolymer of claim 1 has a heat of fusion of 5 to 85 J/g for propylene based polymers and 5 to 120 J/g for ethylene based polymers. 6. The heterophasic copolymer of claim 1 , wherein the total area of the domains is at least 40% of the total area of the heterophasic copolymer. 7. The heterophasic copolymer of claim 1 , wherein the matrix phase comprises at 10 to 40 wt % of the heterophasic copolymer, and the fill phase comprises at 60 to 90 wt % of the heterophasic copolymer, based on the total weight of the matrix and fill phases. 8. The heterophasic copolymer of claim 1 , wherein the heterophasic copolymer has an Mw of 200,000 to 1,000,000 g/mol. 9. The heterophasic copolymer of claim 1 , further comprising an outer shell comprising isotactic-polypropylene (iPP), wherein the outer shell has a thickness of 200 to 1000 nm.
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Classifications
- C08L23/12Primary
Polypropene · CPC title
Coating · CPC title
at least partially crystalline copolymers of propene with other olefins · 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
Heterophasic composition · CPC title
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- What does patent US11034827B2 cover?
- Heterophasic copolymers of propylene and an alpha olefin comonomer having a matrix phase and a fill phase, particularly, a heterophasic copolymer having a high fill phase content (greater than or equal to 50%), are provided herein. Polymerization methods and catalyst systems for producing such heterophasic copolymers are also provided.
- Who is the assignee on this patent?
- Exxonmobil Chemical Patents Inc
- What technology area does this patent fall under?
- Primary CPC classification C08L23/12. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jun 15 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 7 related publications on this page (citations in our corpus or others sharing the same primary CPC).