CROSS-LINKABLE POLYMERIC COMPOSITIONS, METHODS FOR MAKING THE SAME, AND ARTICLES MADE THEREFROM

• US 20150203701A1
• Filed: 09/11/2013
• Published: 07/23/2015
• Est. Priority Date: 09/12/2012
• Status: Active Grant

• Current Assignee: Dow Global Technologies LLC (Dow, Inc.)
• Original Assignee: Dow Global Technologies LLC (Dow, Inc.)
• Inventors: Sun, Yabin, Cogen, Jeffrey M., Zhu, Journey Lu, Person, Timothy J.
• Granted Patent: US 9,957,405 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: C08K 5/0025 Crosslinking or vulcanising agents; including accelerators
• CPC Class Codes: C08K 5/12 of cyclic polycarboxylic acids
• CPC Class Codes: C08K 5/14 Peroxides
• CPC Class Codes: C08K 5/3492 Triazines
• CPC Class Codes: C08K 5/34924 containing cyanurate groups; Tautomers thereof
• CPC Class Codes: C08L 23/04 Homopolymers or copolymers of ethene
• CPC Class Codes: C09D 123/06 Polyethene
• CPC Class Codes: H01B 13/06 Insulating conductors or cables H01B13/32 takes precedence
• CPC Class Codes: H01B 7/02 Disposition of insulation

Abstract

Cross-linkable polymeric compositions comprising an ethylene-based polymer, an organic peroxide, and a polyallyl cross-linking coagent, where the polyallyl cross-linking coagent and the organic peroxide are present in amounts sufficient to provide an allyl-to-active oxygen molar ratio of at least 1.6, based on the allyl content of the polyallyl cross-linking coagent and the active oxygen content of the organic peroxide. Such cross-linkable polymeric compositions can be employed in forming coated conductors.

Claims

1. A cross-linkable polymeric composition comprising:

an ethylene-based polymer;

an organic peroxide; and

a polyallyl cross-linking coagent,

wherein said polyallyl cross-linking coagent and said organic peroxide are present in amounts sufficient to provide an allyl-to-active oxygen molar ratio of at least 1.6, based on the allyl content of said polyallyl cross-linking coagent and the active oxygen content of said organic peroxide.

2. The cross-linkable polymeric composition of claim 1, wherein said organic peroxide is present in said cross-linkable polymeric composition in an amount of less than 1.4 weight percent, based on the combined weight of said ethylene-based polymer, said organic peroxide, and said polyallyl cross-linking coagent;

wherein said polyallyl cross-linking coagent is present in said cross-linkable polymeric composition in an amount of at least 0.5 weight percent, based on the combined weight of said ethylene-based polymer, said organic peroxide, and said polyallyl cross-linking coagent;

wherein said ethylene-based polymer is present in said cross-linkable polymeric composition in an amount ranging from 50 to 98.9 weight percent, based on the total cross-linkable polymeric composition weight.

3. The cross-linkable polymeric composition of claim 1, wherein said polyallyl cross-linking coagent is a triallyl compound;

wherein said organic peroxide is a mono-functional peroxide.

4. The cross-linkable polymeric composition of claim 1, wherein said polyallyl cross-linking coagent is selected from the group consisting of triallyl isocyanurate (“

TAIC”

), triallyl cyanurate (“

TAC”

), triallyl trimellitate (“

TATM”

), and mixtures of two or more thereof;

wherein said organic peroxide is dicumyl peroxide.

5. The cross-linkable polymeric composition of claim 1, wherein said polyallyl cross-linking coagent and said organic peroxide are present in amounts sufficient to provide an allyl-to-active oxygen molar ratio of at least 1.9, based on the allyl content of said polyallyl cross-linking coagent and the active oxygen content of said organic peroxide;

wherein said cross-linkable polymeric composition is substantially free of scorch inhibitors.

6. A process for producing a coated conductor, said process comprising:

(a) coating a conductor with a cross-linkable polymeric composition, wherein said cross-linkable polymeric composition comprises an ethylene-based polymer, an organic peroxide, and a polyallyl cross-linking coagent; and

(b) curing or allowing to cure at least a portion of said cross-linkable polymeric composition, thereby forming a cross-linked polymeric coating,

wherein said polyallyl cross-linking coagent and said organic peroxide are present in said cross-linkable polymeric composition in amounts sufficient to provide an allyl-to-active oxygen molar ratio of at least 1.6, based on the allyl content of said polyallyl cross-linking coagent and the active oxygen content of said organic peroxide.

7. The process of claim 6, wherein said organic peroxide is present in said cross-linkable polymeric composition in an amount of less than 1.4 weight percent, based on the combined weight of said ethylene-based polymer, said organic peroxide, and said polyallyl cross-linking coagent;

wherein said polyallyl cross-linking coagent is present in said cross-linkable polymeric composition in an amount of at least 0.5 weight percent, based on the combined weight of said ethylene-based polymer, said organic peroxide, and said polyallyl cross-linking coagent;

wherein said ethylene-based polymer is present in said cross-linkable polymeric composition in an amount ranging from 50 to 98.9 weight percent, based on the total cross-linkable polymeric composition weight.

8. The process of claim 6, wherein said polyallyl cross-linking coagent is selected from the group consisting of triallyl isocyanurate (“

TAIC”

), triallyl cyanurate (“

TAC”

), triallyl trimellitate (“

TATM”

), and mixtures of two or more thereof;

wherein said organic peroxide is dicumyl peroxide.

9. The process of claim 6, wherein said polyallyl cross-linking coagent and said organic peroxide are present in amounts sufficient to provide an allyl-to-active oxygen molar ratio of at least 1.9, based on the allyl content of said polyallyl cross-linking coagent and the active oxygen content of said organic peroxide;

wherein said cross-linkable polymeric composition is substantially free of scorch inhibitors, wherein said cross-linked polymeric coating has a cross-link density (MH-ML) of at least 2.5 dN·

m.

10. A cable prepared according to the process of claim 6.