Polylactic acid copolymer and method of producing the same
US-2021269587-A1 · Sep 2, 2021 · US
Polylactic acid solid composition and method for producing the same
US12084541B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12084541-B2 |
| Application number | US-202017598355-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 30, 2020 |
| Priority date | Mar 29, 2019 |
| Publication date | Sep 10, 2024 |
| Grant date | Sep 10, 2024 |
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- Title
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Abstract
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A polylactic acid solid composition includes: a polylactic acid having a weight average molecular weight of not more than 40,000, which is measured in terms of polystyrene standard by GPC; and a basic compound of an alkali metal or an alkaline earth metal, which is a residue of a molecular weight reduction accelerator. The basic compound is contained in an amount in a range of 0.5 to 20 mass %.
First claim
Opening claim text (preview).
The invention claimed is: 1. A polylactic acid solid composition comprising: a polylactic acid having a weight average molecular weight in a range of 12,000 to 40,000, which is measured in terms of polystyrene standard by GPC; and sodium carbonate, as a molecular weight reduction accelerator, wherein the sodium carbonate is contained in an amount in a range of 7.4 to 20 mass %, wherein the polylactic acid solid composition has a granular form with an average particle diameter (D 50 ) of not more than 6.492 μm, which is measured by a laser diffraction scattering method. 2. The polylactic acid solid composition according to claim 1 , wherein the polylactic acid is the only polymer component contained therein.
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Classifications
Carbonates; Bicarbonates · CPC title
Compounds containing metals of Groups 1 to 3 or of Groups 11 to 13 of the Periodic Table · CPC title
Polymers characterised by physical features, e.g. anisotropy, viscosity or electrical conductivity · CPC title
Polyesters derived from hydroxy carboxylic acids, e.g. lactones (C08J2367/06 takes precedence) · CPC title
Pre-melted polymers · CPC title
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- What does patent US12084541B2 cover?
- A polylactic acid solid composition includes: a polylactic acid having a weight average molecular weight of not more than 40,000, which is measured in terms of polystyrene standard by GPC; and a basic compound of an alkali metal or an alkaline earth metal, which is a residue of a molecular weight reduction accelerator. The basic compound is contained in an amount in a range of 0.5 to 20 mass %.
- Who is the assignee on this patent?
- Toyo Seikan Group Holdings Ltd
- What technology area does this patent fall under?
- Primary CPC classification C08G63/08. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Sep 10 2024 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 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).