Flame-retardant, cross-linked EPDM rubber

Patent metadata

Field	Value
Publication number	US-9879121-B2
Application number	US-201514867404-A
Country	US
Kind code	B2
Filing date	Sep 28, 2015
Priority date	Sep 28, 2015
Publication date	Jan 30, 2018
Grant date	Jan 30, 2018

Abstract

In an example, a process includes polymerizing a mixture that includes an ethylene monomer, a propylene monomer, and a diene monomer to form an ethylene-propylene-diene (EPDM) terpolymer using ring-opening metathesis polymerization (ROMP). The process further includes chemically reacting the EPDM terpolymer with a norbornene-based phosphinate cross-linking material to form a flame-retardant, cross-linked EPDM rubber.

First claim

The invention claimed is:

1. A process comprising:
polymerizing a mixture that includes an ethylene monomer, a propylene monomer, and a diene monomer to form an ethylene-propylene-diene (EPDM) terpolymer and
chemically reacting the EPDM terpolymer with a norbornene-based phosphinate cross-linking material by a ring-opening reaction to form a flame-retardant, cross-linked EPDM rubber.

2. The process of claim 1 , wherein the ethylene monomer includes chlorinated ethylene.

3. The process of claim 1 , wherein the diene monomer includes 5-ethylidene -2- norbornene, 5-propylidene-2-norbornene, or a combination thereof.

4. The process of claim 1 , wherein forming the EPDM terpolymer includes using a mixture of Cp*TiMe 3 and B(C 6 F 5 ) 3 as a catalyst material.

5. The process of claim 4 , wherein at least a portion of the catalyst material remains after formation of the flame-retardant, cross-linked EPDM rubber.

6. The process of claim 1 , further comprising chemically reacting a norbornene-based alcohol and a phosphinate material to form the norbornene-based phosphinate cross-linking material.

7. The process of claim 6 , wherein the norbornene-based alcohol includes 5-norbornene-2-methanol.

8. The process of claim 6 , wherein the phosphinate material includes 3- (hydroxyl(phenyl)phosphoryl)propanoic acid.

9. A process comprising:
polymerizing a mixture that includes a chlorinated ethylene monomer, a propylene monomer, and a diene monomer to form a chlorinated ethylene-propylene-diene (EPDM) terpolymer;
chemically reacting a norbornene-based alcohol and a phosphinate material to form a norbornene-based phosphinate cross-linking material; and
chemically reacting the chlorinated EPDM terpolymer with the norbornene-based phosphinate cross-linking material by a ring-opening reaction to form a flame-retardant, cross-linked chlorinated EPDM rubber.

10. The process of claim 9 , wherein a weight percentage of the chlorinated ethylene monomer is in a range of 30 to 80 weight percent of the mixture.

11. The process of claim 9 , wherein a weight percentage of the diene monomer is in a range of 2 to 10 weight percent of the mixture.

12. The process of claim 9 , wherein the norbornene-based alcohol includes 5- norbornene-2-methanol.

13. The process of claim 9 , wherein the phosphinate material includes 3- (hydroxyl(phenyl)phosphoryl)propanoic acid.

14. An article of manufacture comprising:
a flame-retardant, cross-linked ethylene-propylene-diene (EPDM) rubber that is cross-linked using a norbornene-based phosphinate cross-linking material.

15. The article of manufacture of claim 14 , further comprising Cp*TiMe 3 and B(C 6 F 5 ) 3 .

16. The article of manufacture of claim 14 , wherein chlorine (Cl) is incorporated into a polymer backbone of the flame-retardant, cross-linked EPDM rubber.

Assignees

• IBM

Inventors

• Czaplewski Sarah K
• Kuczynski Joseph
• Wertz Jason T
• Zhang Jing

Classifications

• C08G61/08 Primary

  of carbocyclic compounds containing one or more carbon-to-carbon double bonds in the ring · CPC title

• C08C19/28

  Reaction with compounds containing carbon-to-carbon unsaturated bonds (graft polymers C08F279/00) · CPC title

• C08F232/08

  having condensed rings (coumarone-indene polymers C08F244/00) · CPC title

• C08J2323/16

  Ethene-propene or ethene-propene-diene copolymers · CPC title

• C08F8/40

  Introducing phosphorus atoms or phosphorus-containing groups · CPC title