CN1099681C - Composition for electric - Google Patents
Composition for electric Download PDFInfo
- Publication number
- CN1099681C CN1099681C CN98802918A CN98802918A CN1099681C CN 1099681 C CN1099681 C CN 1099681C CN 98802918 A CN98802918 A CN 98802918A CN 98802918 A CN98802918 A CN 98802918A CN 1099681 C CN1099681 C CN 1099681C
- Authority
- CN
- China
- Prior art keywords
- composition
- polymer
- weight
- cable
- acrylate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
- H01B3/441—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/2813—Protection against damage caused by electrical, chemical or water tree deterioration
Abstract
A composition for electric cables is described. The composition comprises an ethylene copolymer which includes a (poly)alkylene glycol mono(meth)acrylate of formula (I) wherein R1 = H or CH3; R2 = H or CH3; n = 1-20. The composition may be used as an insulating layer or a semiconducting layer of an electric cable.
Description
The present invention relates to be used for the composition of cable.More particularly, the present invention relates to contain the ethene polymers of (methyl) acrylate, this polymer can be used for cable composition, more particularly, is used for the inside and outside semiconductor layer and the insulating barrier of cable.
Cable, particularly in and the high voltage power cable form by the polymer of extruding around many layer of electric conductor.Generally be at first the shell of electric conductor to be coated with the semiconductor bulk internal layer, be coated with then, be coated with again, be coated with water barrier again at shell if any with the semiconductor bulk skin with insulating barrier.
Insulating barrier and semiconductor bulk layer generally are made up of crosslinked ethylene homo and/or copolymer.LDPE (low density polyethylene (LDPE) is promptly under high pressure by the polyethylene of radical polymerization) makes it crosslinked through adding peroxide such as dicumyl peroxide, and the cable through extruding is main cable insulation material today.The restriction of traditional LDPE is that it is generating dendritic branch's defective easily in the presence of water and under the highfield effect, promptly so-called water tree, and this can cause breaking and may have a power failure.Because the inhomogeneities, microcavity and the impurity that exist in the material, this trend can be strengthened.Water tree was through studying in great detail, and twentieth century polymeric material since the seventies particularly is during particularly crosslinked polyethylene becomes and since the main insulating material of high-voltage cable.In the past few years, these researchs make the quality and the cleannes of structure, manufacture method and material therefor of cable that improvement all arranged.These improvement prolong the cable life of manufacturing.The strong needs that also have the material that further improves anti-water tree.The needs of insulating layer material are not only in the improvement of antagonism water tree, and are the needs of cable semiconductor layer material.A critical nature of cable semiconductor layer material is that high resistance is broken.
From European patent application EP-A-0 057 604, learn, by mainly by polyolefin with to account for the molecular weight that adds about 0.1-20% weight in the semiconductor composition that the carbon black of the 5-50% weight of total composition forms be that the polyethylene glycol of 1000-20000 can prevent that sealing sets (water trees).This composition can be used for the semiconductor layer of cable.By adding polyethylene glycol, allegedly can remove water tree by progress insulating barrier in interface between insulating barrier and the semiconductor layer.
And US Patent specification US-A 4,812, disclose a kind of insulating barrier that can be used for cable and composition that can anti-water tree in 505.This composition comprises the alpha-olefin of an ethylene copolymer and at least a 4-8 of a having carbon atom, as 1-butylene, 1-hexene or 1-octene, comprises the polyethylene glycol of the about 1000-20000 of molecular weight of 0.1-20% weight in addition.
Use the shortcoming of anti-sealing tree additive such as polyethylene glycol to be, because the compatibility deficiency of the same original polymer of polyethylene glycol (polyethylene), particularly when its molecular weight is not high, the danger that polyethylene glycol has sweating to come out.But if the molecular weight height, effectively the possibility of mixing can be adversely affected.
European patent specification EP-A-0 538 033 discloses a kind of extrudable ethene-hydroxy acrylate copolymer or ter-polymers, the latter is except ethene, and what also comprise the hydroxy acrylate of 7-30% weight and 0-40% weight is selected from vinyl esters, allyl ester and the not acrylate of hydroxyl or the 3rd monomer of methacrylate.Hydroxy acrylate can be made up of any ester of glycol or polyglycols and acrylic or methacrylic acid, but preferably hydroxyethyl meth acrylate, methylol methacrylate, hydroxypropyl acrylate or hydroxypropyl methyl acrylate.According to this description of the invention, hydroxy acrylate is in the past known hot-melt object and the product of extruding, for example film is hydrophilic and can absorbs and transmit moisture, ethene-hydroxy acrylate copolymer has improved the adhesiveness to polarity plastics and other material, and owing to hydrogen bond has improved intensity property.This patent specification does not point out that this polymer is used for cable composition.
Digest 77-85827Y/48 by the Derwent of Japanese patent specification JP 7644050 learns that a kind of ethylene copolymer comprises the ethene of 25-99.9% weight, the polyalkylene glycol mono acrylate of 75-0.1% weight and other ethylenically unsaturated monomer of 0-65% weight.This polymer allegedly can be used for coating, printing ink etc., and the finishing agent of metal, paper, wool etc. is as binder etc.But unexposed this polymer is as cable composition.
According to the present invention, be surprised to find that now, use (gathering) alkylene glycol mono (methyl) acrylate as can the be improved cable composition of water tree resistant property of the comonomer in the ethene polymers.
Therefore, the invention provides a kind of cable composition, it is characterized in that comprising a kind of ethylene copolymer, the comonomer that comprises in this copolymer is general formula I (gathering) alkylene glycol mono (methyl) acrylate
R in the formula
1=H or CH
3, R
2=H or CH
3, n=1-20.
More specifically say, plan with the insulating barrier and the semiconductor layer of composition of the present invention as cable.
Other characteristics of the present invention and advantage will obtain understanding from following explanation and appended claim.
" ethylene copolymer " of Shi Yonging is meant the polyvinyl that obtains by ethene and one or more other monomer polymerizations herein, and a kind of in these monomers is made up of general formula I (gathering) alkylene glycol mono (methyl) acrylate.Ethylene copolymer preferably is made up of the polymer of monomers of ethene and general formula I, or ethene, the monomer of general formula I and the copolymer composition of another kind of monomer, is so-called ter-polymers under latter event.
" (methyl) acrylic acid " and " (methyl) acrylate " used herein are meant acrylic acid, acrylate and methacrylic acid and methacrylate.
By above-mentioned general formula I as can be known, (gathering) alkylene glycol mono (methyl) acrylate of general formula I is the ester of acrylic acid or (methyl) acrylic acid and (gathering) aklylene glycol, aklylene glycol is selected from ethylene glycol or propylene glycol, the number of alkylidene oxygen unit is 1-20, promptly n=1-20 in general formula I is preferably 1-10.R in general formula I
1CH preferably
3, i.e. esterification acid is methacrylic acid, R in general formula I
2Be H, i.e. esterification (gathering) aklylene glycol is (gathering) ethylene glycol.When n=1, the monomer of general formula I is to have above-mentioned preferred R
1And R
2Methacrylic acid hydroxyethyl ester (HEMA), when n=6, the monomer of general formula I is to have above-mentioned preferred R
1And R
2Methacrylic acid 1,6-hexylidene ester.
Amount at ethylene copolymer formula of I comonomer can change in wide region, but preferably accounts for about 0.1-15% weight of copolymer, more preferably about 2-14% weight.
As mentioned above, ethylene copolymer optional comprises other monomer except the comonomer of general formula I, and these other comonomers make copolymer become ter-polymers.This comonomer can be selected from can be with the monomer of ethene and general formula I (gathering) alkylene glycol mono (methyl) acrylic ester copolymer.These monomers are known the professional who is familiar with this field, do not need further to enumerate, and still, for example can mention ethylenically unsaturated monomer, as C
3-C
8Alpha-olefin, for example propylene, butylene etc. contain the ethylenically unsaturated monomer of functional group such as hydroxyl, alkoxyl, carbonyl, carboxyl and ester group.These monomers for example can be, (methyl) acrylic acid and Arrcostab thereof, and as (methyl) methyl acrylate, ethyl ester and butyl ester, unsaturated hydrolyzable silane monomer of olefinic such as vinyltrimethoxy silane, vinylacetate etc.
Except (gathering) alkylene glycol mono (methyl) acrylate of general formula I, the consumption of other comonomer accounts for about 40% weight of 0-of ethylene copolymer, is preferably about 1-30% weight.
The summation of above-mentioned all content of monomer is 100% weight.
Ethylene copolymer of the present invention can be prepared by the high pressure polymerisation of graft copolymerization or free radical initiation.
Itself is well known in the art polymerization graft copolymerization, does not therefore need to describe in detail.In general, graft copolymerization is at radical initiator such as peroxide, for example carries out copolymerization by ethylenically unsaturated monomer with ethene polymers such as Alathon or ethylene copolymer under the influence of cumyl peroxide base (DCP) and makes.The temperature of graft copolymerization should be enough to make radical initiator decompose to generate free radical, does at the cumyl peroxide base to be about 150-200 ℃ under the situation of initator.Polymerization reaction can be carried out practically, for example by in extruder each composition mixing being carried out.
The high pressure polymerisation that well-known free radical causes is reactor under the high temperature of about 100-300 MPa high pressure and about 80-300 ℃ normally, as making monomer reaction in autoclave or the tubular reactor under radical initiator such as peroxide, hydroperoxides, oxygen or azo-compound influence.When reaction is finished, reduce temperature and pressure, and reclaim the unsaturated polymer that obtains.Producing polyvinyl further details about high pressure polymerisation under causing at free radical can be with reference to " polymer science and engineering macropaedia " (Encyclopedia of Polymer Science andEngineering), 6 volumes (1986), 383-410 page or leaf, especially 404-407 page or leaf.
As mentioned above, the present invention has been found that, use (gathering) alkylene glycol mono (methyl) acrylate of general formula I to increase anti-water tree (WTR) in ethylene copolymer, therefore this ethylene copolymer can be used as cable material, for example as insulating barrier or semiconductor layer material.Because (gather) alkylene glycol mono (methyl) acrylic ester polymerization of general formula I that produces anti-water tree in polymer molecule, therefore can not resemble to set at traditional anti-water and move the additive or sweating is come out.This is a special advantage of the present invention.Except anti-water tree advantage, find that also ethene polymers of the present invention when as cable material, also can cause other favourable and character hope.Have been found that ethylene copolymer of the present invention can improve the insulating barrier and the semiconductor layer dielectric strength of cable.And the semiconductor layer of the cable of ethylene copolymer of the present invention has good environmental stress crack resistance energy (ESCR).For ease of understanding the present invention, provide below that some are illustrative but be not restrictive embodiment and comparative example.
Embodiment 1
With so-called Ashcraft test method determination three kinds of polymer compositions, i.e. the anti-water of polymer 1, polymer 2 and polymer 3 tree property (WTR).
The Ashcraft test method(s) of WTR character that is used to measure polymer is by Ashcraft, and A.C. discussed, and " the water tree of polymer dielectric medium " literary composition is delivered in the world electrician meeting of holding in Soviet Union Moscow on June 22nd, 1977.Test the effect that is had very much feature by Ashcraft, promptly utilize at compression molded cup and obtain sharp keen water-filled impression.Impose the voltage of 5 kilovolts/6 kilo hertzs of sesames through water, and with ground connection at the bottom of the cup.Temperature constant remains on 65 ℃.Through 72 hours aging after, the average length of water tree is measured as the rate of rise of the water tree in concrete material.
For testing, by the compression molded testpieces of various polymer manufacture.Wherein use polymer for referencial use 1 to form by/10 minutes low density polyethylene (LDPE) (LDPE) of melt flow rate (MFR) 2 grams, polymer 2 is made up of as traditional prevention water tree agent the LDPE of the above-mentioned same-type of 99.1 weight portions and the polyethylene glycol (PEG) that adds the molecular weight about 20000 of 0.56 weight portion, be the polymer 3 of the present composition the ethene that adds 20.0 weight portions by 79.8 weight portions, the LDPE of the above-mentioned same-type of the ter-polymers of the six ethylidene monomethacrylates (3% weight) of methacrylate (13% weight) and general formula 1 forms, R in the formula
1=CH
3, R
2=H, n=6.This polymer composition also contains the cumyl peroxide base and the stabilizer (about 0.2 weight portion) of about 2 weight portions.The Ashcraft result of the test is listed in the table below.
Composition
The water tree
Average length (micron) Average length (%)Polymer 1 (reference) 374 100 polymer 2 (contrast) 149 40 polymer 3 (the present invention) 126 34
Result of the test clearly illustrates that composition of the present invention has the WTR performance of enhancing.
Embodiment 2
In this embodiment, the anti-water tree property that has compared two kinds of compositions of the present invention by the Ashcraft test.These compositions mix the polymer of setting with the prevention water of different content by/10 minutes low density polyethylene (LDPE) (LDPE) of MFR=2 gram and form, the polymer that stops the water tree is made up of the hydroxyethyl meth acrylate of the vinylacetate of ethene, 20% weight and 9% weight that (HEMA is the comonomer of general formula I, R in the formula
1=CH
3, R
2=H, n=1).A kind of composition contains the prevention water tree polymer of 6.5% weight, and another composition contains the prevention water tree polymer of 14% weight.By Ashcraft test, obtain % water tree average length with the average water tree length gauge of the reference polymer of embodiment 1, the composition with 6.5% weight EVA-HEMA is 46%, the composition with 14% weight EVA-HEMA is 21%.Therefore, along with the increase of the prevention water tree polymer content that contains general formula 1 monomer, water tree resistant property increases.
Embodiment 3
In this embodiment, three kinds of dielectric strengths that semiconductive polymer composition is A polymer B and polymer C have been measured.These polymer constitute the semiconductor internal layer of cable.
First kind of composition (polymer A) is made up of the ethylene-vinyl acetate copolymer (EVA) of the vinylacetate with 18% weight, and this composition contains the carbon black of about 40% weight so that make composition have semiconductive.This composition is with for referencial use.
Second kind of composition (polymer B) by with first kind in identical EVA polymer form, the molecular weight that different is has been added with 0.6% weight is about 20000 polyethylene glycol (PEG), in addition, this composition contains the carbon black of about 40% weight.This composition is the example of prior art.
The third composition (polymer C) is made up of the ter-polymers of the monomer of the general formula I of the vinylacetate of ethene, 18% weight and 3% weight.The monomer of general formula I is made up of six ethylidene glycol monomethacrylates, i.e. R in general formula I
1=CH
3. R
2=H, n=6.And this composition contains the carbon black of about 40% weight.This composition is a composition of the present invention.
Each of above-mentioned three kinds of compositions adds cable as the semiconductor internal layer.From inside to outside see, by outer composition of semiconductor of 6.1 millimeters of the insulating barrier of 5.8 millimeters of semiconductor internal layer, the external diameters of 2.8 millimeters of 1.4 millimeters copper conductors, external diameter and external diameters.Insulating barrier is that/10 minutes low density polyethylene (LDPE) of 2 grams is formed by MFR, and the semiconductor skin is made up of the copolymer of the ethene butyl acetate of the carbon black that adds 40% weight of having an appointment.
Alcatel AG ﹠amp according to German Hannover; The method of Co exploitation has been carried out the test of dielectric strength to these test cables.This method is by Land H.G., and Schadlich Hans concentrates with " estimating the standard cable test method(s) of midium voltage cable compound ageing properties under the water influence " (ModelCable Test for Evaluating the Ageing Behaviour under WaterInfluence of Compounds for Medium Voltage Cables) and delivers holding Jlcable 91 meeting papers the 24-28 day in June, 1991 of French Versaille.As the dielectric strength value is with Weibull figure E
Max63% the expression, unit is a kvolts/millimeter.The mensuration one side A of dielectric strength) in 90 ℃ of air, wear out and carry out after 16 hours, on the other hand B) in 85/70 ℃ water, carry out after aging 1000 hours in 9 kvolts/millimeter.Result of the test is listed in the table below.
Composition
Dielectric strength
A (kvolts/millimeter) B (kvolts/millimeter)
Polymer A (reference) 77.9 39.6
Polymer B (prior art) 95.6 40.6
Polymer C (the present invention) 93.6 45.4
Can find out that by result of the test composition of the present invention demonstrates good performance as the semiconductor internal layer.Specifically, in 85/70 ℃ of water, has outstanding dielectric strength after aging 1000 hours in 9 kvolts/millimeter.
Embodiment 4
In this embodiment, use the test of cable having been carried out dielectric strength similar in appearance to the mode of embodiment 3.The composition of the semiconductor internal layer of the cable of testing is by the methacrylate of ethene, about 15% weight and six ethylidene glycol monomethacrylates of about 2% weight, the i.e. monomer of the general formula I identical with embodiment 3, and the carbon black of about 40% weight is formed.In test, in 85/70 ℃ of water, after aging 1000 hours, obtain the dielectric strength (E of 59.4 kvolts/millimeter in 9 kvolts/millimeter
Max63%).
Embodiment 5
In this embodiment, tested anti-environmental stress cracking (ESCR), especially to outer this character particular importance of the semiconductor of cable.Method according to ASTM D 1693 is carried out this test.Under 50 ℃, among 10% Igepal, in air, under 50 ℃, carry out on the other hand on the one hand.
Tested three kinds of semiconductive polymer compositions (polymer 1,2 and 3), it is composed as follows.
Polymer 1(contrast groups contains thing): ethylene vinyl acetate copolymer with 9% weight vinylacetate and MFR=9.5 decigram/10 minute.And this composition contains the carbon black of about 36% weight.
Polymer 2(Comparative composition): ethylene vinyl acetate copolymer with 18% weight vinylacetate and MFR=9 decigram/10 minute.And this composition contains the carbon black of about 40% weight.
Polymer 3(the present invention): be the ter-polymers of the ethylene vinyl acetate hydroxyethyl meth acrylate of the hydroxyethyl meth acrylate of the vinylacetate that contains 9% weight, 10% weight and MFR=6 decigram/10 minute.And this composition contains the carbon black of about 36% weight.
The result of the test of ESCR is shown in following table.The number of the testpieces that in the test of certain hour (in hour) back, breaks in 10 testpieces.
Test number of packages/the hourage that breaks
Composition
ESCR, air, 50 ℃
ESCR, 10% Igepal
Polymer 1 1,0/0 9/0
Polymer 2 3/4 9/1.5
Polymer 3 1/6 7/24
Can find out that by result of the test composition of the present invention has quite improved ESCR, therefore be suitable for very much the semiconductor cladding material of making cable.
Claims (9)
1. a cable composition is characterized in that it comprises ethylene copolymer, and the comonomer of this copolymer comprises (gathering) alkylene glycol mono (methyl) acrylate with general formula I
R in the formula
1=H or CH
3, R
2=H or CH
3, n=1-20.
2. the composition of claim 1 is characterized in that R
1=CH
3, R
2=H, n=1-10.
3. claim 1 or 2 composition is characterized in that n=1.
4. claim 1 or 2 composition is characterized in that n=6.
5. claim 1 or 2 composition is characterized in that (gathering) alkylene glycol mono (methyl) acrylate of general formula I accounts for the 0.1-15% of ethylene copolymer weight.
6. claim 1 or 2 composition is characterized in that ethylene copolymer except (gathering) alkylene glycol mono (methyl) acrylate that comprises general formula I, comprise that also the vinyl unsaturated comonomer is as further comonomer.
7. the composition of claim 6 is characterized in that the vinyl unsaturated comonomer that also comprises is selected from C
3-C
8Alpha-olefin, (methyl) acrylic acid and its ester, vinylacetate and the undersaturated hydrolyzable silane monomer of vinyl, therein ethylene base unsaturated comonomer accounts for the 1-40% of ethylene copolymer weight.
8. each composition is used to form the purposes of the insulating barrier of cable among the claim 1-7.
9. each composition is used to form the purposes of the semiconductor layer of cable among the claim 1-7, and wherein said composition comprises the carbon black of capacity so that it has semiconductive.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE97003743 | 1997-02-04 | ||
| SE9700374A SE508564C2 (en) | 1997-02-04 | 1997-02-04 | Composition for electric cables comprising an ethylene copolymer which, as a comonomer, comprises a polyalkylene glycol monomethacrylate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1249060A CN1249060A (en) | 2000-03-29 |
| CN1099681C true CN1099681C (en) | 2003-01-22 |
Family
ID=20405662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98802918A Expired - Fee Related CN1099681C (en) | 1997-02-04 | 1998-01-09 | Composition for electric |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0962021A1 (en) |
| JP (1) | JP2001509946A (en) |
| KR (1) | KR100537287B1 (en) |
| CN (1) | CN1099681C (en) |
| AU (1) | AU6008298A (en) |
| SE (1) | SE508564C2 (en) |
| WO (1) | WO1998034236A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE9800567L (en) * | 1998-02-25 | 1999-08-26 | Abb Ab | An electric DC cable with an insulation system comprising a composition based on extruded, cross-linked polyethylene and a method for making such a cable |
| KR100833444B1 (en) | 2006-03-28 | 2008-05-29 | 주식회사 하이닉스반도체 | Method of manufacturing a flash memory device |
| KR101732860B1 (en) | 2008-06-05 | 2017-05-04 | 유니온 카바이드 케미칼즈 앤드 플라스틱스 테크날러지 엘엘씨 | Method for producing water tree-resistant, trxlpe-type cable sheath |
| CN102365324B (en) * | 2009-03-30 | 2015-08-19 | 博里利斯股份公司 | There is after aging the cable of high-level disruptive strength |
| BR112013016031B1 (en) | 2010-12-22 | 2020-04-07 | Basell Polyolefine Gmbh | process for preparing ethylene copolymer in the presence of free radical polymerization initiator by ethylene copolymerization, ethylene copolymer obtained by such a process and its use, as well as process for coating by extruding a substrate |
| EP3088427A1 (en) * | 2015-04-30 | 2016-11-02 | ARLANXEO Deutschland GmbH | Ethylene copolymer exhibiting improved low temperature and vulcanizable mixtures and vulcanizates based thereon |
| EP3390467B1 (en) * | 2015-12-17 | 2023-07-12 | SABIC Global Technologies B.V. | Ethylene copolymers and process for the production thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4812505A (en) * | 1987-05-18 | 1989-03-14 | Union Carbide Corporation | Tree resistant compositions |
| FI90986C (en) * | 1991-10-15 | 1994-04-25 | Neste Oy | Use of an extrudable ethylene-hydroxyacrylate blend polymer |
| IT1276762B1 (en) * | 1995-06-21 | 1997-11-03 | Pirelli Cavi S P A Ora Pirelli | POLYMER COMPOSITION FOR THE COVERING OF ELECTRIC CABLES HAVING AN IMPROVED RESISTANCE TO "WATER TREEING" AND ELECTRIC CABLE |
-
1997
- 1997-02-04 SE SE9700374A patent/SE508564C2/en not_active IP Right Cessation
-
1998
- 1998-01-09 KR KR10-1999-7007023A patent/KR100537287B1/en not_active IP Right Cessation
- 1998-01-09 JP JP53277298A patent/JP2001509946A/en active Pending
- 1998-01-09 WO PCT/SE1998/000013 patent/WO1998034236A1/en active IP Right Grant
- 1998-01-09 EP EP98903313A patent/EP0962021A1/en not_active Withdrawn
- 1998-01-09 CN CN98802918A patent/CN1099681C/en not_active Expired - Fee Related
- 1998-01-09 AU AU60082/98A patent/AU6008298A/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| EP0962021A1 (en) | 1999-12-08 |
| KR20010049164A (en) | 2001-06-15 |
| JP2001509946A (en) | 2001-07-24 |
| CN1249060A (en) | 2000-03-29 |
| SE9700374L (en) | 1998-08-05 |
| WO1998034236A1 (en) | 1998-08-06 |
| SE9700374D0 (en) | 1997-02-04 |
| SE508564C2 (en) | 1998-10-19 |
| KR100537287B1 (en) | 2005-12-21 |
| AU6008298A (en) | 1998-08-25 |
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