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Crosslinked polyarylene sulfide, composition, and method for producing molded article
US2024043621A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2024043621-A1 |
| Application number | US-202118027383-A |
| Country | US |
| Kind code | A1 |
| Filing date | Aug 26, 2021 |
| Priority date | Sep 29, 2020 |
| Publication date | Feb 8, 2024 |
| Grant date | — |
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Abstract
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A method for producing a crosslinked polyarylene sulfide resin (PAS resin) that reduces a difference in melt viscosity among lots and has excellent quality stability is provided. Further specifically, the method includes steps of compression-molding an uncrosslinked PAS resin in a powder form to obtain a compression-molded material, measuring a true specific gravity of the compression-molded material, grinding the compression-molded product having a specific range of true specific gravity to obtain a pulverized material, granulating the pulverized material to obtain a granulated material, and oxidatively crosslinking the granulated material obtained in the above step. Also provided are a method for producing a composition containing the crosslinked PAS, and a method for producing a molded article by melt-molding the composition.
First claim
Opening claim text (preview).
1 . A method for producing a crosslinked polyarylene sulfide, the method comprising steps of: compression-molding an uncrosslinked polyarylene sulfide in a powder form to obtain a compression-molded material; measuring a true specific gravity of the compression-molded material; grinding the compression-molded product having a specific range of true specific gravity to obtain a pulverized material; granulating the pulverized material to obtain a granulated material; and oxidatively crosslinking the granulated material obtained in the above step. 2 . The method for producing a crosslinked polyarylene sulfide according to claim 1 , wherein a shape of the granulated material is amorphous. 3 . The method for producing a crosslinked polyarylene sulfide according to claim 1 or 2 , wherein the specific range of true specific gravity is within a range of 1.10 to 1.30. 4 . A method for producing a resin composition, the method comprising steps of: producing a crosslinked polyarylene sulfide produced by the method according to any one of claims 1 to 3 ; and melt-kneading the obtained crosslinked polyarylene sulfide with another component. 5 . A method for producing a molded article, the method comprising steps of: producing a resin composition by the method according to claim 4 ; and melt-molding the obtained resin composition.
Assignees
Inventors
Classifications
- C08G75/0295Primary
Modification with inorganic compounds · CPC title
Powdering or granulating · CPC title
Heating methods · CPC title
Polythioethers; Polythioether-ethers · CPC title
- C08J3/24Primary
Crosslinking, e.g. vulcanising, of macromolecules (mechanical aspects B29C35/00; crosslinking agents C08K) · CPC title
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- What does patent US2024043621A1 cover?
- A method for producing a crosslinked polyarylene sulfide resin (PAS resin) that reduces a difference in melt viscosity among lots and has excellent quality stability is provided. Further specifically, the method includes steps of compression-molding an uncrosslinked PAS resin in a powder form to obtain a compression-molded material, measuring a true specific gravity of the compression-molded ma…
- Who is the assignee on this patent?
- Dainippon Ink & Chemicals
- What technology area does this patent fall under?
- Primary CPC classification C08G75/0295. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Feb 08 2024 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).