Flame-retardant copolymers

Patent metadata

Field	Value
Publication number	US-9540568-B1
Application number	US-201514809640-A
Country	US
Kind code	B1
Filing date	Jul 27, 2015
Priority date	Jul 27, 2015
Publication date	Jan 10, 2017
Grant date	Jan 10, 2017

Abstract

In an example, a process includes combining a methyl methacrylate monomer, a butadiene monomer, a styrene monomer, and an organophosphate monomer. The process includes initiating a polymerization reaction to form a flame-retardant copolymer.

First claim

The invention claimed is:

1. A polymeric impact modifier comprising a flame-retardant methyl methacrylate-butadiene-styrene (MBS) copolymer having a polymer chain including a phosphorus-containing acrylic monomer or a phosphorus-containing styrenic monomer.

2. The polymeric impact modifier of claim 1 further comprising a polylactic acid (PLA) polymer, and wherein the polymeric impact modifier improves an impact resistance of a polymeric material and does not degrade a flame retardance of the polymeric material.

3. The polymeric impact modifier of claim 1 , wherein the flame-retardant methyl MBS copolymer has a first flame retardance value that is greater than a second flame retardance value of a MBS copolymer that does not include phosphorus.

4. The polymeric impact modifier of claim 1 wherein the phosphorus-containing acrylic monomer or the phosphorus-containing styrenic monomer includes a diphenylphosphate material or a triphenylphosphate material.

5. A polymeric blend comprising:
a first polymeric material that includes a flame-retardant methyl methacrylate-butadiene-styrene (MBS) copolymer having a polymer chain including a phosphorus-containing acrylic monomer or a phosphorus-containing styrenic monomer; and
a second polymeric material.

6. The polymeric blend of claim 5 , wherein the second polymeric material includes a polylactic acid (PLA) homopolymer.

7. The polymeric blend of claim 5 , wherein the second polymeric material includes a second polymeric blend that includes a polylactic acid (PLA) polymer and a polycarbonate (PC) polymer.

8. The polymeric blend of claim 5 , wherein the polymeric blend satisfies a plastics flammability standard that includes a burning stop rate of not less than 30 seconds on a vertical specimen.

9. The polymeric blend 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.

10. The polymeric blend of claim 5 , wherein the polymeric blend satisfies a plastics flammability standard that includes a burning stop rate of not less than 10 seconds on a vertical specimen.

11. The polymeric blend of claim 10 , 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 polymeric blend of claim 5 wherein the phosphorus-containing acrylic monomer or the phosphorus-containing styrenic monomer includes a diphenylphosphate material or a triphenylphosphate material.

13. A polymeric impact modifier comprising a flame-retardant methyl methacrylate-butadiene-styrene (MBS) copolymer having a polymer chain that includes an organophosphate material, wherein the flame-retardant methyl MBS copolymer has a first impact resistance value that is greater than a second impact resistance value of a polylactic acid (PLA) homopolymer.

14. The polymeric impact modifier of claim 13 , wherein addition of the flame-retardant methyl MBS copolymer to a polymeric material that includes a polylactic acid (PLA) polymer improves an impact resistance of the polymeric material and does not degrade a flame retardance of the polymeric material.

15. The polymeric impact modifier of claim 14 , wherein the PLA polymer includes a PLA homopolymer.

16. The polymeric impact modifier of claim 14 , wherein the polymeric material includes a polymeric blend that includes the PLA polymer.

17. The polymeric impact modifier of claim 16 , wherein the polymeric blend further includes a polycarbonate (PC) polymer.

18. The polymeric impact modifier of claim 16 , wherein the polymeric blend satisfies a plastics flammability standard that allows drips of non-inflamed particles.

19. The polymeric impact modifier of claim 16 , wherein the polymeric blend satisfies a plastics flammability standard that does not allow drips of flaming particles.

20. The polymeric impact modifier of claim 13 , wherein the flame-retardant methyl MBS copolymer has a first flame retardance value that is greater than a second flame retardance value of a MBS copolymer that does not include phosphorus.

Assignees

• IBM

Inventors

• Boday Dylan J
• Kuczynski Joseph
• Mauldin Timothy C

Classifications

• C08L67/04 Primary

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

• C09K21/14 Primary

  Macromolecular materials · CPC title

• C08F230/02

  containing phosphorus · CPC title

• C08L69/00

  Compositions of polycarbonates; Compositions of derivatives of polycarbonates · CPC title

• C08L43/02

  Homopolymers or copolymers of monomers containing phosphorus · CPC title