Flame retardant lactide monomors for polylactide synthesis

Patent metadata

Field	Value
Publication number	US-10570252-B2
Application number	US-201715452914-A
Country	US
Kind code	B2
Filing date	Mar 8, 2017
Priority date	Mar 8, 2017
Publication date	Feb 25, 2020
Grant date	Feb 25, 2020

Abstract

A process of forming a flame retardant polylactide includes forming a flame retardant lactide monomer. The process also includes forming a lactide feedstock that includes at least the flame retardant lactide monomer. The process further includes polymerizing the lactide feedstock to form a flame retardant polylactide.

First claim

What is claimed is:

1. A process of forming a flame retardant polylactide, the process comprising:
forming a flame retardant lactide monomer, wherein the flame retardant lactide monomer includes at least one bromide group;
forming a lactide feedstock that includes at least the flame retardant lactide monomer; and
polymerizing the lactide feedstock to form a flame retardant polylactide.

2. The process of claim 1 , wherein the flame retardant lactide monomer includes a monobrominated lactide monomer.

3. The process of claim 1 , wherein the flame retardant lactide monomer includes a dibrominated lactide monomer.

4. The process of claim 1 , wherein the flame retardant lactide monomer includes a tetrabrominated lactide monomer.

5. The process of claim 1 , wherein the lactide feedstock includes an alcohol initiator, and wherein the flame retardant polylactide includes a terminal vinyl group.

6. The process of claim 5 , wherein the alcohol initiator includes allyl alcohol.

7. The process of claim 1 , wherein the lactide feedstock includes a blend, the blend including a first amount of an L-lactide monomer and a second amount of the flame retardant lactide monomer.

8. The process of claim 1 , further comprising utilizing the flame retardant polylactide to form an article of manufacture having flame retardancy characteristics that satisfy a plastics flammability standard.

9. The process of claim 8 , wherein the plastics flammability standard includes a burning stop rate of less than 30 seconds on a vertical specimen.

10. The process of claim 8 , wherein the plastics flammability standard includes a burning stop rate of less than 10 seconds on a vertical specimen.

11. The process of claim 8 , wherein the plastics flammability standard allows drips of non-inflamed particles, and wherein the plastics flammability standard does not allow drips of flaming particles.

12. The process of claim 8 , wherein the article of manufacture is formed from a blend that includes the flame retardant polylactide and a second polymeric material, the second polymeric material including a polyurethane material, a polycarbonate material, an acrylonitrile butadiene styrene (ABS) material, a polyester material, a polyether material, or a combination thereof.

13. A flame retardant polylactide formed by a process comprising:
forming a lactide feedstock that includes at least a flame retardant lactide monomer, wherein the flame retardant lactide monomer includes at least one bromide group; and
polymerizing the lactide feedstock to form the flame retardant polylactide.

14. The flame retardant polylactide of claim 13 , wherein the process further comprises forming the flame retardant lactide monomer from an L-lactide molecule or a derivative thereof.

15. The flame retardant polylactide of claim 13 , wherein the lactide feedstock includes a blend, the blend including a first amount of an L-lactide monomer and a second amount of the flame retardant lactide monomer.

16. An article of manufacture formed by a process comprising:
forming a lactide feedstock that includes a first amount of an L-lactide monomer and a second amount of a flame retardant lactide monomer, wherein the flame retardant lactide monomer includes at least one bromide group;
polymerizing the lactide feedstock to form a flame retardant polylactide;
forming a blend that includes the flame retardant polylactide and a second polymeric material; and
forming an article of manufacture from the blend, wherein the second amount of the flame retardant lactide monomer in the lactide feedstock is selected such that the article of manufacture has flame retardancy characteristics that satisfy a plastics flammability standard.

17. The process of claim 16 , wherein the second polymeric material including a polyurethane material, a polycarbonate material, an acrylonitrile butadiene styrene (ABS) material, a polyester material, a polyether material, or a combination thereof.

Assignees

• IBM

Inventors

• Kobilka Brandon M
• Kuczynski Joseph
• Porter Jacob T
• Wertz Jason T

Classifications

• C08G63/6822

  derived from hydroxy carboxylic acids · CPC title

• C08L2201/02

  Flame or fire retardant/resistant · CPC title

• C08G63/6922 Primary

  derived from hydroxy carboxylic acids · CPC title

• C08L67/04

  Polyesters derived from hydroxycarboxylic acids, e.g. lactones (C08L67/06 takes precedence) · CPC title