Ethylene-vinyl alcohol copolymer composition, multilayer structure produced by using the composition, and hot-water sterilizable package
US-2019010305-A1 · Jan 10, 2019 · US
Melt-formable ethylene-vinyl alcohol copolymer composition, pellets, and multilayer structure
US11242451B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11242451-B2 |
| Application number | US-201916693919-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 25, 2019 |
| Priority date | Jun 27, 2017 |
| Publication date | Feb 8, 2022 |
| Grant date | Feb 8, 2022 |
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- Title
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Abstract
Official abstract text for this publication.
A melt-formable ethylene-vinyl alcohol copolymer composition and a multilayer structure are substantially free from heat coloration. The melt-formable ethylene-vinyl alcohol copolymer composition contains: (A) an ethylene-vinyl alcohol copolymer; (B) an alkali earth metal compound; and (C) an iron compound; wherein the iron compound (C) is present in an amount of 0.01 to 20 ppm on a metal basis based on the weight of the ethylene-vinyl alcohol copolymer composition.
First claim
Opening claim text (preview).
The invention claimed is: 1. A melt-formable ethylene-vinyl alcohol copolymer composition comprising: (A) an ethylene-vinyl alcohol copolymer; (B) an alkali earth metal compound; and (C) an iron compound; wherein the iron compound (C) is present in an amount of 0.01 to 10 ppm on a metal basis based on the weight of the ethylene-vinyl alcohol copolymer composition. 2. The melt-formable ethylene-vinyl alcohol copolymer composition according to claim 1 , wherein the alkali earth metal compound (B) is present in an amount of 0.1 to 500 ppm on a metal basis based on the weight of the ethylene-vinyl alcohol copolymer composition. 3. The melt-formable ethylene-vinyl alcohol copolymer composition according to claim 1 , wherein the weight ratio of the amount of the alkali earth metal compound (B) on a metal basis to the amount of the iron compound (C) on a metal basis is 0.005 to 50,000. 4. The melt-formable ethylene-vinyl alcohol copolymer composition according to claim 1 , wherein the alkali earth metal compound (B) is an alkali earth metal carboxylate. 5. Pellets comprising the melt-formable ethylene-vinyl alcohol copolymer composition according to claim 1 . 6. A multilayer structure comprising a layer that comprises the melt-formable ethylene-vinyl alcohol copolymer composition according to claim 1 . 7. A method of melt-forming the ethylene-vinyl alcohol copolymer composition according to claim 1 comprising: preparing the ethylene-vinyl alcohol copolymer composition, and melt-forming the ethylene-vinyl alcohol copolymer composition.
Assignees
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Classifications
- B29B9/12Primary
characterised by structure or composition · CPC title
Phosphates of heavy metals · CPC title
Stabilisers, e.g. against oxydation, light or heat · CPC title
Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids · CPC title
Compounds containing metals of Groups 4 to 10 or of Groups 14 to 16 of the Periodic Table · CPC title
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- What does patent US11242451B2 cover?
- A melt-formable ethylene-vinyl alcohol copolymer composition and a multilayer structure are substantially free from heat coloration. The melt-formable ethylene-vinyl alcohol copolymer composition contains: (A) an ethylene-vinyl alcohol copolymer; (B) an alkali earth metal compound; and (C) an iron compound; wherein the iron compound (C) is present in an amount of 0.01 to 20 ppm on a metal basis…
- Who is the assignee on this patent?
- Mitsubishi Chem Corp
- What technology area does this patent fall under?
- Primary CPC classification B29B9/12. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Feb 08 2022 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).