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Soft and strong elastomeric compositions from semicrystalline-amorphous polyolefin block copolymers
US8993672B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8993672-B2 |
| Application number | US-8097108-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 8, 2008 |
| Priority date | Apr 9, 2007 |
| Publication date | Mar 31, 2015 |
| Grant date | Mar 31, 2015 |
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Abstract
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Polyolefin block and graft copolymers comprised of two or more semicrystalline polyolefin blocks or grafts and one or more amorphous polyolefin blocks can be blended with a low molecular weight fluid diluent that preferentially locates within and swells the amorphous domains of the block or graft copolymer, while preserving the crystallinity of the semicrystalline block domains. After mechanical or thermomechanical processing, such compositions combine softness with high strength and high recoverable elasticity. Compositions are also disclosed whereby the diluent species is removed from the composition, either before or after the mechanical or thermomechanical processing, in order to create a strong elastic material with an ultra-low entanglement density within the amorphous domains.
First claim
Opening claim text (preview).
The invention claimed is: 1. A polymer gel composition comprising a mixture of (a) one or more semicrystalline polyolefin block or graft copolymers and (b) one or more fluid diluents, wherein: each semicrystalline polyolefin copolymer is an A-B block or graft co-polymeric material comprised of two or more blocks or grafts of a semicrystalline polyolefin A bridged by one or more blocks of an amorphous polyolefin B; each fluid diluent is miscible or partially miscible with the amo…
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Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
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- What does patent US8993672B2 cover?
- Polyolefin block and graft copolymers comprised of two or more semicrystalline polyolefin blocks or grafts and one or more amorphous polyolefin blocks can be blended with a low molecular weight fluid diluent that preferentially locates within and swells the amorphous domains of the block or graft copolymer, while preserving the crystallinity of the semicrystalline block domains. After mechanica…
- Who is the assignee on this patent?
- Fredrickson Glenn H, Kramer Edward J, Wang Zhigang, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification C08J3/075. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Mar 31 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).