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Silane crosslinkable polymer composition

A technology of polymers and compositions, applied in the direction of cables, insulated conductors, power cables, etc., can solve problems such as unfavorable natural environment, unmentioned application, danger, etc.

Active Publication Date: 2015-11-25
BOREALIS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For the crosslinking of polyolefins containing hydrolyzable silane groups, silanol condensation catalysts must be used, condensation catalysts, for example, organic compounds of tin, zinc, iron, lead or cobalt, such as dibutyltin dilaurate (DBTDL), However, it is well known that DBTDL has adverse effects on the natural environment when cross-linked products such as cables are buried underground, except that it is also a very dangerous substance to use
[0007] CA50288 discloses a Ti catalyst for processing epoxy-functionalized polymers; GB1377737 discloses a method for grafting polyolefins with silane compounds by UV irradiation, the grafted polyolefins are subsequently treated with metal carboxylates, titanium esters or titanium Ligands for crosslinking; the catalyst used in this example is dibutyltin dilaurate; but applications for wire and cable (W&C) are not mentioned, WO2007032885 discloses a method for W&C crosslinking applications catalyst

Method used

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  • Silane crosslinkable polymer composition
  • Silane crosslinkable polymer composition
  • Silane crosslinkable polymer composition

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0212] The strip samples prepared in the examples of the following "Preparation of strip samples" section were used to test the thermal extension properties. According to ISO5275A, the cross-linked samples after passing 1.7±0.1mm were taken out along the extrusion direction. Dumbbell-shaped samples were prepared. The hot extension test is carried out in accordance with EN60811-2-1 (hot extension test) to test the thermal deformation performance.

[0213] On the dumbbell, the baseline interval is marked at 20mm, each test sample is fixed vertically, the upper end of the sample is fixed in the furnace, and a load of 0.1MPa is applied to the lower end of each sample, in the furnace at 200°C, after 15min, the measurement is marked in advance The distance between the baselines, calculate the thermal elongation percentage, and obtain the elongation percentage. For percent permanent set, the stress (weight) is removed from the test sample, recovered at 200°C for 5 min, cooled at roo...

Embodiment 1

[0220] Preparation Example

[0221] Base polyolefin (a)

[0222] Polyolefin I

[0223] The copolymer LE4423 of ethylene and vinyltriethoxysilane (VTMS) comonomer is commercially available, provided by Borealis, the VTMS content in the copolymer is 1.35wt% (0.26mol%), and the MFR is 1.0g / 10min ( 190°C / 2.16kg), the density is 923kg / m 3 , in a tubular reactor, using high-pressure polymerization for production.

[0224] Reference masterbatch

[0225] Reference catalyst: traditional tin catalyst, dioctyltin laurate

[0226] Catalyst masterbatch: The masterbatch was prepared by infusing dioctyltin laurosilicate into pellets of an existing copolymer of ethylene and butyl acrylate prepared under high pressure in a tubular reactor (acrylic acid Butyl ester, BA, the content is 15wt%), as the carrier polymer.

[0227] The resulting masterbatch contained 3.5 wt% catalyst, based on the total amount of the masterbatch.

[0228] Masterbatches 1 to 7 of the present invention

[0229]...

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Abstract

A crosslinkable polymer composition having (a) a polyolefin bearing hydrolysable silane groups and a silanol condensation catalyst compound, as well as to an article, preferably a cable, thereof. A silanol condensation catalyst compound utilized for crosslinking an article, preferably a layer of a cable.

Description

technical field [0001] The present invention relates to a polymer composition comprising a crosslinkable polyolefin with hydrolyzable silane groups and a silanol condensation catalyst; a polymer composition designed to be used in the production of products, preferably Application in cables; relates to a method of producing a product, preferably a cable, comprising said composition, said method comprising a crosslinking step of the product, preferably a cable sheath; relates to a product comprising said composition, Preferably a cable; and designing a crosslinked product, preferably a cable, comprising said composition. Background technique [0002] It is well known that cross-linked polyolefins can improve various properties of polyolefins, such as mechanical strength and chemical thermal stability, by means of additives. Crosslinking can be achieved by condensation of silanol groups contained in polyolefins, which can be obtained by hydrolysis of silane groups. Silane gro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/22C08L23/08H01B3/44C08L23/06C08K5/56B29C48/09B29C48/154B29C48/21
CPCC08L43/04B29C47/0023B29C47/025B29C47/065C08F8/00C08F8/12C08J3/226C08J2343/04C08J2351/06C08J2423/08C08K5/56C08L23/0892H01B3/441H01B7/02H01B9/00B29C48/09B29C48/21B29C48/154C08L2666/06C08F210/02C08J3/22C08L23/08H01B3/44
Inventor 克里斯蒂安·达伦奥拉·法格雷尔谢尔·福萨姆托马斯·耶特贝里佩里·尼兰德奥斯卡·普列托
Owner BOREALIS AG