A Composition, Articles Made Therefrom, and Method of Making the Articles

Patent metadata

Field	Value
Publication number	US-2016200909-A1
Application number	US-201314653372-A
Country	US
Kind code	A1
Filing date	Nov 19, 2013
Priority date	Dec 31, 2012
Publication date	Jul 14, 2016
Grant date	—

Abstract

A crosslinked polyethylene composition formed through reaction of (A) functionalized polyethlyene having vinyltrialkoxysilanol grafted functionalities; and (B) hydroxyl-terminated silicone, wherein the crosslinked polyethylene comprises —C—C—Si—[O—Si(C) 2 ] m —O—Si—C—C— crosslinkages is provided; and (C) a small amount of catalyst. Articles made from the crosslinked polyethtylene and methods of making such articles are also provided.

First claim

1 . A crosslinked polyethylene composition formed through reaction of (A) functionalized polyethlyene having vinyltrialkoxysilanol grafted functionalities; and (B) hydroxyl-terminated silicone, wherein the crosslinked polyethylene comprises —C—C—Si—[O—Si(C) 2 ] m —O—Si—C—C— crosslinkages; and (C) a small amount of catalyst

2 . The crosslinked polyethylene according to claim 1 , wherein the amount of hydroxyl-terminated silicone in the reaction is from 50 ppm to 20%, based on the amount of polyethylene in the reaction.

3 . The crosslinked polyethylene according to claim 1 having a viscosity at 190° C. of at least 10 7 Pa·s.

4 . A process for preparing a crosslinked polyethylene composition comprising
providing a polyethylene having vinyltrialkoxysilanol grafted functionalities; and mixing the polyethylene with 50 ppm to 20% hydroxyl-terminated silicone, based on the amount of polyethylene, to form a crosslinkable resin; wherein the crosslinkable mixture is capable of forming —C—C—Si—[O—Si(C) 2 ] m —O—Si—C—C— crosslinkages at a temperature less than 70° C.

5 . An article of manufacture comprising the crosslinked polyethylene composition according to claim 1 .

6 . The article of manufacture according to claim 5 , wherein the article is a pipe.

7 . The pipe according to claim 6 having a wall thickness up to 20 cm.

8 . The pipe according to claim 7 , wherein the pipe is extruded.

9 . A method of making a pipe comprising the step of extruding the crosslinked polyethylene composition of claim 1 .

10 . The crosslinked polyethylene composition according to claim 1 , wherein the crosslinked polyethylene exhibits a viscosity at 190° C. of at least 10 7 Pa

Assignees

• Dow Global Technologies Llc

Inventors

• Chang Dane
• Baker Carl F
• Zhou Zhiqiang
• Guerra Suzanne G
• Cogen Jeffrey M
• Chaudhary Bharat I
• Esseghir Mohamed
• Sengupta Saurav S

Classifications

• C08J3/246

  Intercrosslinking of at least two polymers · CPC title

• C08J2351/06

  grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond · CPC title

• C08F299/08

  from polysiloxanes · CPC title

• C08L51/003 Primary

  grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds (C08L51/04, C08L51/06 take precedence) · CPC title

• C08J3/244

  Stepwise homogeneous crosslinking of one polymer with one crosslinking system, e.g. partial curing · CPC title