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US-9809687-B2 · Nov 7, 2017 · US
Method for producing poly-4-methyl-1-pentene with lower molecular weight
US12539656B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12539656-B2 |
| Application number | US-202218700001-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 11, 2022 |
| Priority date | Oct 13, 2021 |
| Publication date | Feb 3, 2026 |
| Grant date | Feb 3, 2026 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
According to the method of the present invention, poly-4-methyl-1-pentene with a lower molecular weight can be easily and safely produced by mixing poly-4-methyl-1-pentene and another type of polyolefin (I) and conducting melt-stirring at a temperature equal to or higher than the melting points of both the poly-4-methyl-1-pentene and the polyolefin (I).
First claim
Opening claim text (preview).
The invention claimed is: 1 . A method for producing poly-4-methyl-1-pentene with a lower molecular weight, the method comprising: mixing poly-4-methyl-1-pentene and another type of polyolefin (I); and conducting melt-stirring at a temperature equal to or higher than the melting points of both the poly-4-methyl-1-pentene and the polyolefin (I). 2 . The method according to claim 1 , wherein the polyolefin (I) has a tertiary carbon. 3 . The method according to claim 1 , wherein the polyolefin (I) is polypropylene. 4 . The method according to claim 1 , wherein the mixing includes further adding a hindered phenol compound. 5 . The method according to claim 1 , wherein the polyolefin (I) has a lower viscosity than the poly-4-methyl-1-pentene. 6 . The method according to claim 1 , wherein the polyolefin (I) and the poly-4-methyl-1-pentene are not compatible with each other.
Assignees
Inventors
Classifications
Polymers of hydrocarbons having four or more carbon atoms, e.g. polymers of butylene, e.g. PB, i.e. polybutylene · CPC title
PP, i.e. polypropylene · CPC title
Viscosity; Melt flow index [MFI]; Molecular weight · CPC title
Articles comprising two or more components, e.g. co-extruded layers · CPC title
- B29C48/023Primary
Extruding materials comprising incompatible ingredients · CPC title
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Frequently asked questions
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- What does patent US12539656B2 cover?
- According to the method of the present invention, poly-4-methyl-1-pentene with a lower molecular weight can be easily and safely produced by mixing poly-4-methyl-1-pentene and another type of polyolefin (I) and conducting melt-stirring at a temperature equal to or higher than the melting points of both the poly-4-methyl-1-pentene and the polyolefin (I).
- Who is the assignee on this patent?
- Toyobo Mc Corp
- What technology area does this patent fall under?
- Primary CPC classification B29C48/023. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Feb 03 2026 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).