Thermoplastic polymer particles having low impurity content
US-11001677-B2 · May 11, 2021 · US
Thermoplastic polymer particles having a peak of cold crystallization temperature
US11542372B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11542372-B2 |
| Application number | US-202117212095-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 25, 2021 |
| Priority date | Mar 9, 2017 |
| Publication date | Jan 3, 2023 |
| Grant date | Jan 3, 2023 |
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Abstract
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Provided are thermoplastic polymer particles having an aspect ratio of 1.00 or more and less than 1.05, and a roundness of 0.95 to 1.00. The thermoplastic polymer particles are formed from a thermoplastic polymer resin in a continuous matrix phase. The thermoplastic polymer particles show a peak cold crystallization temperature (Tcc) at a temperature between a glass transition temperature (Tg) and the melting point (Tm) in a differential scanning calorimetry (DSC) curve which is derived from temperature rise analysis at 10° C./min by differential scanning calorimetry.
First claim
Opening claim text (preview).
The invention claimed is: 1. Thermoplastic polymer particles having an aspect ratio of 1.00 or more and less than 1.05 calculated by Formula 1 below and a roundness of 0.95 to 1.00 calculated by Formula 2 below, wherein the thermoplastic polymer is at least one polymer selected from the group consisting of polylactic acid (PLA), thermoplastic polyurethane (TPU), polyethylene (PE), polypropylene (PP), polyether sulfone (PES), poly(methyl methacrylate) (PMMA) and ethylene vinyl-alcohol copolymer (EVOH): Aspect ratio=major axis/minor axis, [Formula 1] Roundness=4×area/(π×major axis{circumflex over ( )}2), [Formula 2] wherein the thermoplastic polymer particles have a peak of cold crystallization temperature (T cc ) at a temperature between a glass transition temperature (T g ) and a melting point (Tm) in a differential scanning calorimetry (DSC) curve derived from temperature rise analysis of 10° C./min by the DSC, and wherein the cold crystallization temperature (T cc ) is shown in a 30% to 70% section between the glass transition temperature (T g ) and the melting point (T m ), wherein 0% is the glass transition temperature (T g ) and 100% is the melting point (T m ). 2. The thermoplastic polymer particles according to claim 1 , wherein the thermoplastic polymer particles are formed as a continuous matrix phase from a thermoplastic polymer resin. 3. The thermoplastic polymer particles according to claim 2 , wherein an impurity content of the thermoplastic polymer particles is 50 ppm or less. 4. The thermoplastic polymer particles according to claim 1 , wherein a particle diameter of the thermoplastic polymer particles is 1 to 1000 μm.
Assignees
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Classifications
- C08J3/122Primary
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- What does patent US11542372B2 cover?
- Provided are thermoplastic polymer particles having an aspect ratio of 1.00 or more and less than 1.05, and a roundness of 0.95 to 1.00. The thermoplastic polymer particles are formed from a thermoplastic polymer resin in a continuous matrix phase. The thermoplastic polymer particles show a peak cold crystallization temperature (Tcc) at a temperature between a glass transition temperature (Tg) …
- Who is the assignee on this patent?
- Lg Hausys Ltd
- What technology area does this patent fall under?
- Primary CPC classification C08J3/122. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jan 03 2023 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 12 related publications on this page (citations in our corpus or others sharing the same primary CPC).