Anti-scorch compositions, methods of making the same, and articles prepared from the same

Patent metadata

Field	Value
Publication number	US-9556324-B2
Application number	US-200913497537-A
Country	US
Kind code	B2
Filing date	Sep 29, 2009
Priority date	Sep 29, 2009
Publication date	Jan 31, 2017
Grant date	Jan 31, 2017

Abstract

The invention provides a composition comprising at least the following:
A) interpolymer comprising, in polymerized form, ethylene, an α-olefin and a nonconjugated polyene; B) sulfur; C) at least one phase transfer catalyst (PTC) selected from the group consisting of the following:

as described herein;

as described herein;

as described herein; and
D) at least one primary accelerator selected from the group consisting of the following:

as described herein;

as described herein;

as described herein;

as described herein; and combinations thereof.

First claim

The invention claimed is:

1. A composition comprising at least the following:
A) interpolymer comprising, in polymerized form, ethylene, an α-olefin and a nonconjugated polyene;
B) sulfur;
C) at least one phase transfer catalyst (PTC) selected from the group consisting of—

wherein R1 is an alkyl group having from 1 to 4 carbon atoms, R2 is an alkyl group having from 1 to 32 carbon atoms, and X is a halogen ion; and
D) at least one primary accelerator selected from the group consisting of the following:

wherein R is H, or a heterocyclic substituent;

wherein M is Zn 2+ , K + , Na + , Cu 2+ or an alkyl ammonium;

wherein R′ and R″ are each, independently, H, an alkyl, a cyclic alkyl, an aromatic, or a heterocyclic substituent, or wherein R′ and R″ together form a cyclic structure;

wherein R, R′, R″ and R′″ are each, independently, H, an alkyl, a cyclic alkyl, an aromatic, or a heterocyclic substituent;
or wherein R and R′ are each, independently, H, an alkyl, a cyclic alkyl, an aromatic, or a heterocyclic substituent, and R″ and R′″ together form a cyclic structure; or
wherein R″ and R′″ are each, independently, H, an alkyl, a cyclic alkyl, an aromatic, or a heterocyclic substituent, and R and R′ together form a cyclic structure; or
wherein R″ and R″ together form a cyclic structure, and R and R′ together form a cyclic structure;
and combinations thereof; and
wherein the composition has a cure rate, at 177° C., of greater than 0.8 lb·in/min.

2. The composition of claim 1 , wherein the accelerator, Component D, is selected from the group consisting of the following:

3. The composition of claim 1 , wherein the interpolymer comprises, in polymerized form from 4 to 8 weight percent of the nonconjugated polyene.

4. The composition of claim 3 , wherein the interpolymer is an EPDM.

5. The composition of claim 1 , wherein the sulfur, Component B, is selected from an elemental sulfur, a polymeric sulfur, or a combination thereof.

6. The composition of claim 1 , wherein the sulfur, Component B, is selected from the group consisting of powder sulfur, insoluble sulfur, surface treated sulfur, polymeric polysulfide, and sulfur olefin adducts.

7. The composition of claim 1 , wherein the composition has a ts2 value at 121° C. of greater than 20 minutes.

8. The composition of claim 1 , wherein the composition has a cure rate, at 200° C., of greater than 2.2 lb·in/min.

9. A cured polymer formed from the composition of claim 1 .

10. An article comprising at least one component formed from the cured polymer of claim 9 .

11. An article comprising at least one component formed from the composition of claim 1 .

12. A composition comprising at least the following:
A) interpolymer comprising, in polymerized form, ethylene, an α-olefin and a nonconjugated polyene;
B) sulfur;
C) at least one phase transfer catalyst (PTC) selected from the group consisting of the following:

wherein each R group is, independently, an alkyl group having from 4 to 32 carbon atoms, and X is a halogen ion;

wherein R1 is an alkyl group having from 1 to 4 carbon atoms, R2 is an alkyl group having from 1 to 32 carbon atoms, and X is a halogen ion; and
combinations of (1) and (3); and
D) at least one primary accelerator selected from the group consisting of the following:

wherein R is H, or a heterocyclic substituent;

wherein M is Zn 2+ , K + , Na + , Cu 2+ or an alkyl ammonium;

wherein R′ and R″ are each, independently, H, an alkyl, a cyclic alkyl, an aromatic, or a heterocyclic substituent, or wherein R′ and R″ together form a cyclic structure;

wherein R, R′, R″ and R′″ are each, independently, H, an alkyl, a cyclic alkyl, an aromatic, or a heterocyclic substituent; or wherein R and R′ are each, independently, H, an alkyl, a cyclic alkyl, an aromatic, or a heterocyclic substituent, and R″ and R′″ together form a cyclic structure; or wherein R″ and R′″ are each, independently, H, an alkyl, a cyclic alkyl, an aromatic, or a heterocyclic substituent, and R and R′ together form a cyclic structure; or wherein R″ and R″ together form a cyclic structure, and R and R′ together form a cyclic structure;
and combinations thereof; and

wherein the composition has a cure rate, at 177° C., of greater than 0.8 lb·in/min.

13. The composition of claim 12 , wherein the accelerator, Component D, is selected from the group consisting of the following:

14. The composition of claim 12 , wherein the interpolymer is an EPDM.

15. The composition of claim 12 , wherein the sulfur, Component B, is selected from an elemental sulfur, a polymeric sulfur, or a combination thereof.

16. An article comprising at least one component formed from the composition of claim 12 .

Assignees

• Sun Yabin
• Marchand Gary R
• Tai Xiang Yang
• Peng Shuwen
• Feng Shaoguang
• Dow Global Technologies Llc

Inventors

• Sun Yabin
• Marchand Gary R
• Tai Xiang Yang
• Peng Shuwen
• Feng Shaoguang

Classifications

• C08L91/00

  Compositions of oils, fats or waxes; Compositions of derivatives thereof · CPC title

• C08K3/06

  Sulfur · CPC title

• C08K5/19 Primary

  Quaternary ammonium compounds · CPC title

• C08C19/20

  Incorporating sulfur atoms into the molecule · CPC title

• C08K5/34

  Heterocyclic compounds having nitrogen in the ring · CPC title