Block copolymer
US-11359057-B2 · Jun 14, 2022 · US
Block copolymer
US11773223B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11773223-B2 |
| Application number | US-202217733698-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 29, 2022 |
| Priority date | Jan 5, 2018 |
| Publication date | Oct 3, 2023 |
| Grant date | Oct 3, 2023 |
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- Title
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Abstract
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Provided is a lactic acid-based block copolymer which is biodegradable while having excellent mechanical properties.
First claim
Opening claim text (preview).
What is claimed is: 1. A block copolymer, comprising a first block and a second block, wherein: the first block is a lactic acid-polymerized repeating unit; the second block is a 3-hydroxypropionic acid (3-HP)-polymerized repeating unit; a molar ratio of lactic acid-polymerized repeating units to 3-HP-polymerized repeating units is 1:0.1 to 1:1, wherein a number (m) of lactic acid-polymerized repeating units is an integer from 1 to 10,000; and a number (n) of 3-HP-polymerized repeating units is an integer from 1 to 10,000, and wherein a ratio of n tom is 1:2 to 1:8. 2. The block copolymer of claim 1 , wherein a molar ratio of lactic acid-polymerized repeating units to 3-HP-polymerized repeating units is 1:0.3 to 1:0.9. 3. The block copolymer of claim 1 , wherein a molar ratio of lactic acid-polymerized repeating units to 3-HP-polymerized repeating units is 1:0.4 to 1:0.7. 4. The block copolymer of claim 1 , wherein the first block and the second block are linked to each other via an ester bond, an amide bond, a urethane bond, a urea bond, or a carbonate bond. 5. The block copolymer of claim 1 , wherein: the first block is a lactic acid-polymerized repeating unit of the following Chemical Formula 3; and the second block is a 3-HP-polymerized repeating unit of the following Chemical Formula 4: 6. The block copolymer of claim 1 , wherein the block copolymer has a weight average molecular weight of 1000 g/mol or more. 7. The block copolymer of claim 1 , wherein the block copolymer has a first peak at a melting point (Tm) of 60° C. to 80° C. and a second peak at a melting point (Tm) of 125° C. to 150° C. in DSC (Differential Scanning Calorimeter) patterns. 8. The block copolymer of claim 1 , wherein the block copolymer has an elongation at break of 50% to 540%. 9. The block copolymer of claim 8 , wherein the block copolymer has: a) a tensile strength of 40 MPa to 55 MPa; or b) a tensile modulus of 1 GPa to 3.3 GPa; or c) both a) and b). 10. The block copolymer of claim 1 , wherein the block copolymer is prepared by reacting polylactic acid and poly(3-hydroxypropionic acid) to form the block copolymer.
Assignees
Inventors
Classifications
- C08G81/027Primary
containing polyester or polycarbonate sequences · CPC title
Monocarboxylic acid compounds · CPC title
Polyester-amides · CPC title
acyclic · CPC title
- C08G63/912Primary
derived from hydroxycarboxylic acids · CPC title
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Frequently asked questions
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- What does patent US11773223B2 cover?
- Provided is a lactic acid-based block copolymer which is biodegradable while having excellent mechanical properties.
- Who is the assignee on this patent?
- Lg Chemical Ltd
- What technology area does this patent fall under?
- Primary CPC classification C08G81/027. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Oct 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 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).