CS249941B1 - Polyolefin composition - Google Patents
Polyolefin composition Download PDFInfo
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- CS249941B1 CS249941B1 CS849499A CS949984A CS249941B1 CS 249941 B1 CS249941 B1 CS 249941B1 CS 849499 A CS849499 A CS 849499A CS 949984 A CS949984 A CS 949984A CS 249941 B1 CS249941 B1 CS 249941B1
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- CS
- Czechoslovakia
- Prior art keywords
- ethylene
- polymers
- vinyl acetate
- melt index
- packaging
- Prior art date
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- 239000000203 mixture Substances 0.000 title claims description 22
- 229920000098 polyolefin Polymers 0.000 title claims description 3
- 230000007797 corrosion Effects 0.000 claims abstract description 13
- 238000005260 corrosion Methods 0.000 claims abstract description 13
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000005977 Ethylene Substances 0.000 claims abstract description 12
- 229920001155 polypropylene Polymers 0.000 claims abstract description 3
- 229920000573 polyethylene Polymers 0.000 claims description 18
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 11
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 10
- 239000000155 melt Substances 0.000 claims description 7
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 abstract description 13
- 229920001577 copolymer Polymers 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000004806 packaging method and process Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 2
- 239000011241 protective layer Substances 0.000 abstract description 2
- 239000004698 Polyethylene Substances 0.000 description 8
- -1 polyethylene Polymers 0.000 description 8
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 230000016507 interphase Effects 0.000 description 4
- 230000000877 morphologic effect Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 239000011256 inorganic filler Substances 0.000 description 2
- 229910003475 inorganic filler Inorganic materials 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920002959 polymer blend Polymers 0.000 description 2
- 101000620653 Homo sapiens Serine/threonine-protein phosphatase 5 Proteins 0.000 description 1
- 102100022346 Serine/threonine-protein phosphatase 5 Human genes 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 229920001038 ethylene copolymer Polymers 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 125000004817 pentamethylene group Chemical group [H]C([H])([*:2])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[*:1] 0.000 description 1
- 230000005501 phase interface Effects 0.000 description 1
- 229920005606 polypropylene copolymer Polymers 0.000 description 1
- YWAKXRMUMFPDSH-UHFFFAOYSA-N propyl ethylene Natural products CCCC=C YWAKXRMUMFPDSH-UHFFFAOYSA-N 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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- Compositions Of Macromolecular Compounds (AREA)
Abstract
Učelom vynálezu je vylepšeme polyolefinických kompozícií na báze polymérov etylénu voči korózii za napátia. Tohto učelu sa dosiahne prídavkom polymérov propylénu a jeho kopolymérov. Predmet vynálezu možno využiť v potnohospodárstve a vo vodárenstve na výrobu hadic pásových zavlažovačov, v plynárenstve na konštrukciu plynových rozvodov, v obalové] technike na výrobu obalov pre přepravu korozívnych médií, v kabelárstve na vonkajšiu ochranná vrstvu káblov, v obuvníctve na výrobu podrážok a podobné.It is an object of the invention to improve polyolefinic polymers based on ethylene against stress corrosion. This teaching is achieved by the addition of propylene polymers and its copolymers. The subject of the invention can be used in agriculture and in the waterworks for production hose sprinklers, in the gas industry for the construction of gas distribution systems, in packaging] technology for the production of packaging for transport corrosive media, in cable management at outer protective layer of cables, in shoe industry soles and the like.
Description
Vynález sa týkia polyolefinických kompozici! na báze polymérov etylénu, ktoré sa vyznačujú vysokou odolnosťou voči korózii za napatia.The invention relates to polyolefin compositions. based on ethylene polymers, characterized by high stress corrosion resistance.
Je známe, že spracovatefské a úžitkové vlastnosti polymérov etylénu sa móžu upraviť prídavkom etylénvinylacetátového kopolyméru. Prídavok etylénvinylacetátového kopolyméru k polymérom etylénu výrazné znižuje odolnost polymérnej kompozície voči korózii za napatia ako to· vyplývá z údajov tabulky 1. Pre niektoré náročnejšie aplikácie v obalovej technike je nedostatočná odolnosť voči korózii za napatia i u samotného polyetylénu. Na úpravu korózie za napátia polyetylénových kompozici! sa podlá AO č. 210 555 odporúča přidávat k polymérom etylénu puravené anorganické plnivo. Tento spósoh však vždy nie je realizovatelný, ' a to bud preto, že nie je dostupné vhodné anorganické plnivo alebo preto, že vzniknutá kompozícia nie je vhodná ma předpokládáni! aplikáciu.It is known that the processing and performance properties of ethylene polymers can be adjusted by the addition of ethylene vinyl acetate copolymer. The addition of ethylene vinyl acetate copolymer to the ethylene polymers significantly reduces the stress corrosion resistance of the polymer composition as shown in Table 1. For some more demanding packaging applications, the stress corrosion resistance of polyethylene alone is insufficient. To treat corrosion under stress of polyethylene compositions! according to AO no. 210,555 recommends adding a purified inorganic filler to the ethylene polymers. However, this method is not always feasible either because no suitable inorganic filler is available or because the resulting composition is not suitable. application.
Tieto nedostatky odstraňuje polyolefinická kompozícia, ktorej podstata spočívá v tom, že pri úpravě korózie za napátia u kompozici! na báze polymérov etylénu pozostávajúcich z kopolymérov propylénu s etylénom s 1 až 20 °/o-ným obsahom etylénu s výhodou o tavnom indexe 0,1 až 4 g/ 10 min. v množstve 1 až 25 % hmot. vzťahujúcich sa na hmotnost etylénu v polymérnych kompozíciach připravených na báze polymérov etylénu a etylénvinylacetátu dojde k výrazným změnám v morfologickej štruktúre, čo sa prejaví okrem změny úžitkových vlastností kompozícií na báze polymérov etylénu aj zvýšením ich odolnosti voči korózii za napátia.These drawbacks are eliminated by the polyolefinic composition, which is based on the fact that in the treatment of stress corrosion in the compositions! based on ethylene polymers consisting of copolymers of propylene with ethylene having a 1 to 20% ethylene content, preferably having a melt index of 0.1 to 4 g / 10 min. % in an amount of 1 to 25 wt. With respect to the weight of ethylene in the polymer compositions prepared on the basis of the polymers of ethylene and ethylene vinyl acetate, there will be significant changes in the morphological structure, which in addition to changing the performance properties of the ethylene polymer compositions also increases their corrosion resistance under stress.
Vztahy medzi štruktúrou a odolnosťou voči korózii za napatia nie sú teoreticky uspokojivo vysvětlené. Předpokládá sa, že působením aktívnych činidiel dojde k napučivaniu amorfných oblastí polymérov, čo sa prejaví zmenšováním kohéznych medzimolekulových sil.The relationship between structure and resistance to stress corrosion is not theoretically explained. It is believed that the action of the active agents swells the amorphous regions of the polymers, resulting in a decrease in the cohesive intermolecular forces.
Prídavok polymérov propylénu v množstve 1 až 25' % hmot., s výhodou 20 % hmot. do polymérov etylénu, resp. v množstve 1 až 25 % hmot., s výhodou 5 % hmot. do zmesi polymérov etylénu a etylénvinylacetátu obsahujúcej 1 až 30 % hmot. etylénvinylacetátu, s výhodou 15 °/o hmot. etylénvinylacetátu ovplyvní povrchové vlastnosti fáz polymérnej kompozície tým, že zníži povrchoví! energiu medzi fázami, Čo priaznivo ovplyvní zmáčanie přítomných fáz v polymérnej kompozícií. Tým sa podpoří strukturizácia polymérnej zmesi, kedže pri nízkej adhézii medzi fázami nie je možné očakávať vytváranie zložitejších vysokoštruktúrnych foriem. Takto sa zabezpečí lepšia dispergácia komponentov v procese homogenizácie, ako aj zvýšená adhézia medzi fázami polymérnych kompozícií připravených na báze polymérov etylénu.The addition of propylene polymers in an amount of 1 to 25% by weight, preferably 20% by weight. into polymers of ethylene, respectively. in an amount of 1 to 25 wt.%, preferably 5 wt. % to a mixture of polymers of ethylene and ethylene vinyl acetate containing 1 to 30 wt. % ethylene vinyl acetate, preferably 15 wt. ethylene vinyl acetate will affect the surface properties of the phases of the polymer composition by reducing the surface properties of the polymer composition. inter-phase energy, which favorably affects the wetting of the phases present in the polymer composition. This promotes the structuring of the polymer mixture, since the formation of more complex high-structural forms cannot be expected at low inter-phase adhesion. This ensures better dispersion of the components in the homogenization process as well as increased inter-phase adhesion of the polymer compositions prepared based on ethylene polymers.
Znížením povrchovej energie medzi fázami a vytvořením zložitejších vysokoštruktúrnych morfologických foriem sa zlepší adhézia přítomných fáz prídavkom etylénpropylénových kopolymérov, resp. kopolyméru, čo sa prejaví zvýšením odolnosti přítomných fáz, či komponentov polymérnej zmesi pripravenej na báze polymérov etylénu voči rozvrstveniu, ako i voči difúzii molekúl aktívnych organických činidiel.By reducing the surface energy between the phases and creating more complex high-structure morphological forms, the adhesion of the phases present is improved by the addition of ethylene propylene copolymers, respectively. copolymer, which results in increased resistance of the present phases or components of the polymer blend prepared on the basis of ethylene polymers to stratification as well as to the diffusion of molecules of active organic agents.
Tým, že sa medzifázová vrstva vytvořená přítomným etylénpropylénovým kopolymérom, resp. kopolymérmi etylénpropylénovými a etylénvinylacetátovými lokalizuje na povrchu fázového rozhrania přítomných komponentov (fáz) ovplyvnia sa i povrchové vlastnosti pripravenej kompozície na báze polymérov etylénu. Vytvořená povrchová medzifázová vrstva so zvýšenou adhéziou k polyetylénovej fáze a zložitejšou morfologickou štruktúrou, a to zvýšeným obsahom propylénových segmentov. v nej, lepšie odolává prieniku molekúl aktívneho korozívneho' organického činidla a následnému rozrušeniu polymérnych vzoriek vystavených korozívnemu prostrediu za mechanického napátia, čo sa prejaví na zvýšení odolnosti polyetylénových kompozícií voči korózii za napatia. Koróziu za napátia sme stanovili podl’a ČSN 64 3010. Ako korozívne činidlo bol použitý LISSAPON N, Za koróziu pod napotím sme brali čas, kedy z deviatich skúšobných teliesok pať prasklo.The interphase layer formed by the present ethylene-propylene copolymer, respectively. The ethylene-propylene and ethylene-vinyl acetate copolymers localize on the phase interface surface of the present components (phases) also the surface properties of the prepared composition based on ethylene polymers are affected. The formed interfacial layer with increased adhesion to the polyethylene phase and more complicated morphological structure by increased content of propylene segments. therein, it better resists the penetration of active corrosive organic agent molecules and the subsequent destruction of the polymeric samples exposed to the corrosive environment under mechanical stress, which results in an increase in the stress corrosion resistance of the polyethylene compositions. Corrosion under stress was determined according to CSN 64 3010. LISSAPON N was used as corrosive agent. For under stress corrosion we took the time when five of the nine test pieces broke.
Výhody spočívajú v tom, že polyetylénové kompozície připravené na báze polyetylénu, evakopolyméru a etylén propylénových kopolymérov nájdu aplikačně použitie v takých oblastiach národného hospodárstva,Jkde ich aplikácia doteraz neholá možná. Dalšou výhodou tohto vynálezu je, že vlastná výroba polymérnej kompozície je ekonomicky nenáročná a technicky l'ahko realizovatelná na strojnotechnologickom zariadení bežne sa nachádzajúcom u výrobcov, resp, spracovávateťov polymérov.The advantage lies in the fact that polyethylene compositions prepared on the basis of polyethylene, evacopolymer and ethylene propylene copolymers will find application in such areas of the national economy, where their application is not yet possible. A further advantage of the present invention is that the actual production of the polymer composition is economically undemanding and technically easy to implement on the machine-technology equipment commonly found in the polymer manufacturers or processors.
Příklad 1 až 4Examples 1 to 4
Granulovaný polyetylén o tavnom indexe 0,07 g/10 min. bol zmiešaný s etylénvinylacetátovým kopolymérom s obsahom 12 % hmot. vinylacetátu o tavnom indexe 4 g/10 minút a kopolymérom propyl énetylénovým s tavným indexom 0,07 g/10 min. o obsahu etylénu 1,8 %. Zmes granulátov bola přetavená v rozmedzí teplót 180 až 240 °C. Korózia za napátia bola stanovená podfa vyššie spomínanej normy.Granular polyethylene with a melt index of 0.07 g / 10 min. was mixed with ethylene vinyl acetate copolymer containing 12 wt. vinyl acetate having a melt index of 4 g / 10 min and a propyl ethylene copolymer with a melt index of 0.07 g / 10 min. with an ethylene content of 1.8%. The granulate mixture was remelted within a temperature range of 180 to 240 ° C. Stress corrosion was determined according to the above standard.
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Polyolefinická kompozícia na báze poly-Polyolefinic composition based on poly-
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Application Number | Priority Date | Filing Date | Title |
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CS849499A CS249941B1 (en) | 1984-12-07 | 1984-12-07 | Polyolefin composition |
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CS849499A CS249941B1 (en) | 1984-12-07 | 1984-12-07 | Polyolefin composition |
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CS949984A1 CS949984A1 (en) | 1985-10-16 |
CS249941B1 true CS249941B1 (en) | 1987-04-16 |
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