Polymer derivatives
US-9574048-B2 · Feb 21, 2017 · US
Method for preparing a modified ethylene-vinyl alcohol copolymer
US8969475B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8969475-B2 |
| Application number | US-201313733366-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 3, 2013 |
| Priority date | Aug 25, 2008 |
| Publication date | Mar 3, 2015 |
| Grant date | Mar 3, 2015 |
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Abstract
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Ethylene-vinyl alcohol copolymers have superior gas barrier properties, but are inferior in bending fatigue resistance. The present invention improves bending fatigue resistance without reducing the gas barrier property and heat resistance. An ethylene-vinyl alcohol copolymer having an ethylene content of 20 to 50 percent by mole is modified by incorporating 0.01 to 1% mol of a structural unit expressed by the following formula (3): wherein, n indicates an integer of 2 to 5, m indicates an integer of 10 to 20, and R 1 indicates a C 1 to C 20 aliphatic hydrocarbon group provided that R 1 may contain a mercapto group, thioester group, sulfenamide, vinyl group, methacryloxy group, or acryloxy group. The modified ethylene vinyl alcohol copolymer may be used as a gas barrier resin and this gas barrier resin may be shaped or laminated and used in various applications such as in pneumatic tires and hoses.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for modifying an ethylene-vinyl alcohol copolymer, comprising melt blending an ethylene-vinyl alcohol copolymer with an alkyl polyether silane expressed by the following formula (4): wherein n indicates an integer of 2 to 7, m indicates an integer of 10 to 20, and R 1 indicates a C 1 to C 20 aliphatic hydrocarbon group or alipha…
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Chemistry & Metallurgy · mapped topic
- C08F8/02Primary
Chemistry & Metallurgy · mapped topic
Operations & Transport · mapped topic
Chemistry & Metallurgy · mapped topic
Operations & Transport · mapped topic
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- What does patent US8969475B2 cover?
- Ethylene-vinyl alcohol copolymers have superior gas barrier properties, but are inferior in bending fatigue resistance. The present invention improves bending fatigue resistance without reducing the gas barrier property and heat resistance. An ethylene-vinyl alcohol copolymer having an ethylene content of 20 to 50 percent by mole is modified by incorporating 0.01 to 1% mol of a structural unit …
- Who is the assignee on this patent?
- Yokohama Rubber Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification C08F8/02. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Mar 03 2015 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).