# US 10,767,042 B2 · Polylactide based compositions

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- Number: US 10,767,042 B2
- Document ID: US10767042B2
- Status: Granted
- Kind: B2
- Application number: 16/116,003
- Filed: 2018-08-29
- Published: 2019-02-28
- Granted: 2020-09-08
- Earliest claimed: 2014-04-29
- Assignees: Total Research & Technology Feluy
- Applicants: Total Research & Technology Feluy
- Inventors: Thierry Coupin
- Web page: https://patentgrep.com/patent/US10767042B2

## CPC

- C08L 67/04: Polyesters derived from hydroxycarboxylic acids, e.g. lactones (C08L67/06 takes precedence)
- C08J 3/005: {Processes for mixing polymers}
- C08J 2367/04: Polyesters derived from hydroxy carboxylic acids, e.g. lactones (C08J2367/06 takes precedence)
- C08J 2453/00: Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)

## Abstract

Embodiments of poly-lactide compositions are disclosed herein. The compositions may comprise at least one first polymer selected from polylactide-polybutadiene (PLA-PB) block copolymer, polylactide-urethane-polybutadiene block copolymer, or a mixture thereof; and at least one second polymer selected from polylactide, polylactide-urethane, or a mixture thereof. The composition may also comprise from 20% to 50% by weight of said first polymer based on the total weight of the composition and from 50% to 80% by weight of said second polymer based on the total weight of the composition. Embodiments of the present invention also relate to a process for preparing the poly-lactide compositions and articles comprising the poly-lactide compositions.

## Claims

### Claim 1

A process for preparing a composition comprising:
contacting (a) at least one first polymer wherein the first polymer is a polylactide-urethane-polybutadiene block copolymer or a mixture of a polylactide-urethane-polybutadiene block copolymer and a PLA-PB block copolymer;
with (b) at least one second polymer selected from polylactide, polylactide-urethane, or a mixture thereof;
wherein the composition comprises;
from 20% to 50% by weight of said first polymer based on the total weight of the composition and from 50% to 80% by weight of said second polymer based on the total weight of the composition.

### Claim 2 (depends on 1)

The process according to claim 1, wherein said contacting step comprises melt blending the at least one first polymer with the at least one second polymer.

### Claim 3 (depends on 1)

The process according to claim 1, wherein said composition is melt blended at a temperature ranging from 160° C. to 230° C.

### Claim 4 (depends on 1)

The process according to claim 1, comprising melt blending from 25% to 50% by weight of polylactide-urethane-polybutadiene block copolymer or a mixture of a polylactide-urethane-polybutadiene block copolymer and a PLA-PB block copolymer; and from 50% to 75% by weight of the second polymer, wherein the second polymer is polylactide.

### Claim 5 (depends on 1)

The process according to claim 1, further comprising processing the composition using one or more polymer processing techniques selected from film, sheet, pipe and fiber extrusion or coextrusion; blow molding; injection molding; rotary molding; foaming; and thermoforming.