Moisture-curable polymeric compositions having halogenated polymers and metal mercaptides

Patent metadata

Field	Value
Publication number	US-10119015-B2
Application number	US-201515315620-A
Country	US
Kind code	B2
Filing date	May 20, 2015
Priority date	Jun 18, 2014
Publication date	Nov 6, 2018
Grant date	Nov 6, 2018

Abstract

A moisture-curable polymeric composition comprising a polyolefin having hydrolyzable silane groups, a halogenated polymer, and a metal mercaptide. Such moisture-curable polymeric compositions, and crosslinked compositions prepared therefrom, can be used in the production of various articles of manufacture, such as coated conductors.

First claim

The invention claimed is:

1. A moisture-curable polymeric composition, comprising:
(a) a polyolefin having hydrolyzable silane groups;
(b) a halogenated polymer; and
(c) a metal mercaptide.

2. The moisture-curable polymeric composition of claim 1 , wherein said polyolefin having hydrolyzable silane groups is present in an amount ranging from 35 to 75 weight percent, based on the total weight of said moisture-curable polymeric composition; wherein said halogenated polymer is present in an amount ranging from 5 to 60 weight percent, based on the total weight of said moisture-curable polymeric composition; wherein said metal mercaptide is present in an amount ranging from 0.1 to 5 weight percent, based on the total weight of said moisture-curable polymeric composition.

3. The moisture-curable polymeric composition of claim 1 , wherein said moisture-curable polymeric composition contains no additional silanol condensation catalyst that is present in an amount sufficient to catalyze moisture crosslinking of said moisture-curable polymeric composition upon exposure to a humid environment.

4. The moisture-curable polymeric composition of claim 1 , wherein said metal mercaptide has the following formula:
R 1 x [M] y (SR 2 ) z
wherein each R 1 is independently selected from an alkyl group, an alkenyl group, an aryl group, an aralkyl group, an alkaryl group, a cycloalkyl group, and a cycloalkenyl group;
wherein each R 2 is independently selected from an alkyl group, an alkenyl group, an aryl group, an aralkyl group, an alkaryl group, a cycloalkyl group, a cycloalkenyl group, or a structure selected from the following formulas (1) through (6):

wherein R 3 is selected from an alkylene group having at least 2 carbon atoms, an arylene group, an alkenylene group, a cycloalkylene group, or a cycloalkenylene group,
wherein R 4 is selected from an alkylene group, an arylene group, and alkenylene group, a cycloalkylene group, or a cycloalkenylene group,
wherein R 5 is —H or R 6 ,
wherein R 6 is selected from an alkyl group, an alkenyl group, an aryl group, an aralkyl group, an alkaryl group, a cycloalkyl group, and a cycloalkenyl group,
wherein M is a metal selected from tin, antimony, zinc, and calcium,
wherein y is equal to the oxidation state of metal M,
wherein x can be any integer from 0 to y−1, inclusive,
wherein z can be any integer from 1 to y, inclusive,
wherein x+z=y.

5. The moisture-curable polymeric composition of claim 4 , wherein M is tin; wherein R 1 is an alkyl group having from 1 to 6 carbon atoms; wherein R 2 is formula (1); wherein R 4 is an alkylene group having from 1 to 6 carbon atoms; wherein R 5 is an alkyl group having from 1 to 12 carbon atoms; wherein y is 4; wherein x is from 1 to 2, inclusive; wherein z is from 2 to 3, inclusive.

6. The moisture-curable polymeric composition of claim 5 , wherein said metal mercaptide is selected from the following formulas (7) and (8), and mixtures thereof:

7. The moisture-curable polymeric composition of claim 1 , wherein said halogenated polymer is selected from the group consisting of polyvinyl chloride (“PVC”); chlorinated polyvinyl chloride (“CPVC”); chlorinated polyethylene; chlorinated natural and synthetic rubber; rubber hydrochloride; chlorinated polystyrene; brominated polystyrene; brominated natural and synthetic rubber; polyvinyl bromide; butadiene styrene brominated copolymer; polyvinyl fluoride; copolymers of vinyl chloride with a copolymerizable ethylenically unsaturated material selected from vinyl acetate, vinyl butyrate, vinyl benzoate, vinylidene chloride, an alkyl fumarate, an alkyl maleate, vinyl propionate, an alkyl acrylate, an alkyl methacrylate, methyl alpha-chloroacrylate, styrene, trichloroethylene, a vinyl ether, a vinyl ketone, 1-fluoro-2-chloroethylene, acrylonitrile, chloroacrylonitrile, allylidene diacetate, chloroallylidene diacetate, and mixtures of two or more thereof; wherein said polyolefin having hydrolyzable silane groups is selected from the group consisting of (i) an interpolymer of ethylene and a hydrolyzable silane, (ii) an interpolymer of ethylene, one or more C 3 or higher α-olefins and/or unsaturated esters, and a hydrolyzable silane, (iii) a homopolymer of ethylene having a hydrolyzable silane grafted to its backbone, and (iv) an interpolymer of ethylene and one or more C 3 or higher α-olefins and/or unsaturated esters, such interpolymer having a hydrolyzable silane grafted to its backbone.

8. A crosslinked polymeric composition prepared from the moisture-curable polymeric composition of claim 1 .

9. The crosslinked polymeric composition of claim 8 , wherein said crosslinked polymeric composition has a hot creep of less than 175%, wherein said crosslinked polymeric composition has a gel content of at least 30 weight percent, based on the entire weight of said crosslinked polymeric composition, wherein said crosslinked polymeric composition has a limiting oxygen index of at least 20%.

10. A coated conductor, comprising:
(a) a conductive core; and
(b) at least a portion of said crosslinked polymeric composition of claim 8 surrounding at least a portion of said conductive core.

Assignees

• Dow Global Technologies Llc
• Rohm & Haas

Inventors

• Chaudhary Bharat I
• Waxman Amy L
• Gorshenin Aleksander

Classifications

• C08L23/0892 Primary

  with monomers containing atoms other than carbon, hydrogen or oxygen · CPC title

• C08K5/58 Primary

  containing sulfur · CPC title

• C08L23/0846

  with unsaturated hydrocarbons containing atoms other than carbon or hydrogen · CPC title

• C08L43/04

  Homopolymers or copolymers of monomers containing silicon · CPC title

• C08K5/37

  Thiols · CPC title