EP3414269A1 - Composition de peroxydes organiques et pré-melange polymère - Google Patents
Composition de peroxydes organiques et pré-melange polymèreInfo
- Publication number
- EP3414269A1 EP3414269A1 EP17709142.8A EP17709142A EP3414269A1 EP 3414269 A1 EP3414269 A1 EP 3414269A1 EP 17709142 A EP17709142 A EP 17709142A EP 3414269 A1 EP3414269 A1 EP 3414269A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- odor
- masking agent
- polymer
- polypropylene
- composition
- 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.)
- Withdrawn
Links
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- 150000001451 organic peroxides Chemical group 0.000 title claims abstract description 100
- 229920000642 polymer Polymers 0.000 title claims abstract description 81
- 150000001299 aldehydes Chemical class 0.000 claims abstract description 26
- 150000002576 ketones Chemical class 0.000 claims abstract description 25
- 125000004432 carbon atom Chemical group C* 0.000 claims abstract description 18
- -1 polypropylene Polymers 0.000 claims description 123
- 239000003795 chemical substances by application Substances 0.000 claims description 120
- 239000004743 Polypropylene Substances 0.000 claims description 98
- 229920001155 polypropylene Polymers 0.000 claims description 98
- 150000002978 peroxides Chemical class 0.000 claims description 57
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- 238000000034 method Methods 0.000 claims description 28
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- 230000008569 process Effects 0.000 claims description 17
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- FGQOOHJZONJGDT-UHFFFAOYSA-N vanillin Natural products COC1=CC(O)=CC(C=O)=C1 FGQOOHJZONJGDT-UHFFFAOYSA-N 0.000 claims description 13
- 150000002148 esters Chemical class 0.000 claims description 11
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- 238000000354 decomposition reaction Methods 0.000 description 6
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- 238000010438 heat treatment Methods 0.000 description 4
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- LTMRRSWNXVJMBA-UHFFFAOYSA-L 2,2-diethylpropanedioate Chemical compound CCC(CC)(C([O-])=O)C([O-])=O LTMRRSWNXVJMBA-UHFFFAOYSA-L 0.000 description 3
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- DOOTYTYQINUNNV-UHFFFAOYSA-N Triethyl citrate Chemical compound CCOC(=O)CC(O)(C(=O)OCC)CC(=O)OCC DOOTYTYQINUNNV-UHFFFAOYSA-N 0.000 description 3
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- ZYGHJZDHTFUPRJ-UHFFFAOYSA-N coumarin Chemical class C1=CC=C2OC(=O)C=CC2=C1 ZYGHJZDHTFUPRJ-UHFFFAOYSA-N 0.000 description 3
- LSXWFXONGKSEMY-UHFFFAOYSA-N di-tert-butyl peroxide Chemical compound CC(C)(C)OOC(C)(C)C LSXWFXONGKSEMY-UHFFFAOYSA-N 0.000 description 3
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- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical class CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 3
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 3
- 125000004356 hydroxy functional group Chemical group O* 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 3
- WTEVQBCEXWBHNA-YFHOEESVSA-N neral Chemical compound CC(C)=CCC\C(C)=C/C=O WTEVQBCEXWBHNA-YFHOEESVSA-N 0.000 description 3
- VWMVAQHMFFZQGD-UHFFFAOYSA-N p-Hydroxybenzyl acetone Natural products CC(=O)CC1=CC=C(O)C=C1 VWMVAQHMFFZQGD-UHFFFAOYSA-N 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
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- 238000002360 preparation method Methods 0.000 description 3
- 239000003755 preservative agent Substances 0.000 description 3
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- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 3
- NJGBTKGETPDVIK-UHFFFAOYSA-N raspberry ketone Chemical compound CC(=O)CCC1=CC=C(O)C=C1 NJGBTKGETPDVIK-UHFFFAOYSA-N 0.000 description 3
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- 239000001069 triethyl citrate Substances 0.000 description 3
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- 235000013769 triethyl citrate Nutrition 0.000 description 3
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- XEJGJTYRUWUFFD-FNORWQNLSA-N (e)-1-(2,6,6-trimethyl-1-cyclohex-3-enyl)but-2-en-1-one Chemical compound C\C=C\C(=O)C1C(C)C=CCC1(C)C XEJGJTYRUWUFFD-FNORWQNLSA-N 0.000 description 2
- PAOHAQSLJSMLAT-UHFFFAOYSA-N 1-butylperoxybutane Chemical compound CCCCOOCCCC PAOHAQSLJSMLAT-UHFFFAOYSA-N 0.000 description 2
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- ZCTQGTTXIYCGGC-UHFFFAOYSA-N Benzyl salicylate Chemical compound OC1=CC=CC=C1C(=O)OCC1=CC=CC=C1 ZCTQGTTXIYCGGC-UHFFFAOYSA-N 0.000 description 2
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- YKLJGMBLPUQQOI-UHFFFAOYSA-M sodium;oxidooxy(oxo)borane Chemical compound [Na+].[O-]OB=O YKLJGMBLPUQQOI-UHFFFAOYSA-M 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000013112 stability test Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 150000003440 styrenes Chemical class 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 229920001059 synthetic polymer Polymers 0.000 description 1
- 229930006978 terpinene Natural products 0.000 description 1
- 150000003507 terpinene derivatives Chemical class 0.000 description 1
- CTQBRSUCLFHKGM-UHFFFAOYSA-N tetraoxolan-5-one Chemical class O=C1OOOO1 CTQBRSUCLFHKGM-UHFFFAOYSA-N 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 150000003573 thiols Chemical class 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 229940070710 valerate Drugs 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
- 238000012800 visualization Methods 0.000 description 1
- 239000003039 volatile agent Substances 0.000 description 1
- 239000012855 volatile organic compound Substances 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C407/00—Preparation of peroxy compounds
- C07C407/003—Separation; Purification; Stabilisation; Use of additives
- C07C407/006—Stabilisation; Use of additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/07—Aldehydes; Ketones
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/14—Peroxides
Definitions
- the present invention relates to an organic peroxide composition suitable for use in a process for implementing a polymer in the molten state, such as visbreaking, crosslinking, grafting chains, to hide or eliminate any unwanted or unwanted odor.
- This invention is intended in particular, but not exclusively, to mask the smell of polypropylene, because of the decomposition products appearing in particular, during its visbreaking.
- This invention is applicable to the field of organic peroxides, preferably organic peroxides having a half-life temperature of 1 hour between 1 10 ° C and 170 ° C, preferably with dialkyl peroxides or peroxides cyclic ketones, and more particularly 2,5-dimethyl-2,5-di (tert-butylperoxy) hexane.
- organic peroxides are particularly used as agents for processing polymers in the molten state, especially during the visbreaking of polypropylene. Their use has the effect of generating an odor on the polymers used in the molten state, and the finished products from said polymers thus implemented.
- the present invention therefore also relates to manufactured products derived from said polymers, particularly polypropylene, and the use of said organic peroxide composition especially in the visbreaking of polypropylene.
- polypropylene The physical properties of polypropylene are advantageous, especially for food, medical, cosmetic and automotive applications. Compared with other polymers such as polyethylene terephthalate (PET), polypropylene has a lower relative density, which in some applications makes it possible to use less material and thus reduce costs.
- PET polyethylene terephthalate
- polypropylene In the food industry, the ability of polypropylene to be impervious to water vapor, makes it an ideal component for the packaging of products / foods, requiring storage in a dry environment. Its ease of forming, for example during blow molding, injection, or during thermoforming, makes it a material of choice for the manufacture of rigid containers for food. Its high resistance to heat is also an asset to design containers to receive food, which will be reheated later.
- polypropylene is used in the manufacture of trays containing prepared meals, designed to withstand microwave heating. The use of polypropylene thus makes it possible to obtain disposable containers which are inexpensive and which retain their rigidities during the heating phase.
- bi-oriented polypropylene films are particularly used in the field of bakery to keep fresh products. BOPP films are also combined with films having low oxygen permeability, to make opaque packages for receiving chips, candies and the like. These polypropylene films also offer good printability.
- the polypropylene For use in various fields of application, the polypropylene must have good thermomechanical properties.
- a commonly used method for characterizing thermoplastic materials and for obtaining information on the extrudability and the shaping possibilities of the material is the Melt Flow Index (MFI). described in ASTM D1238 or NF T 51-016). This melt index is low for crude polypropylene.
- MFI Melt Flow Index
- the polypropylene In order to facilitate and improve its subsequent shaping, the polypropylene must undergo a melt rheological modification step, by extrusion, in order to reduce its viscosity. This method is better known as visbreaking ("visbreaking").
- the decomposition of the organic peroxide during visbreaking produces a radical species which chemically degrades the crude polypropylene by ⁇ -scission.
- This process can be precisely controlled, depending on the extrusion conditions, and the amount of organic peroxide added to the polypropylene during extrusion.
- Raw polypropylene of high viscosity can therefore be converted into a range of polymers with modified thermomechanical properties, including a higher melt flow index, a reduced weight average molecular weight and a reduced molar mass distribution.
- organic peroxide does not include peroxyacids (R- (CO) OOH) or inorganic peroxides, namely hydrogen peroxide, sodium percarbonate, sodium perborate, potassium perborate.
- organic species such as, for example, tert-butyl alcohol (TBA), acetone, methane, and all of the compounds resulting from the polypropylene thermo-oxidation phenomena and / or or decomposition of the organic peroxide, particularly dialkyl peroxide, and more particularly 2,5-dimethyl-2,5-di (ie / f-butylperoxy) hexane are responsible for unpleasant, strong or even aggressive odors.
- TSA tert-butyl alcohol
- acetone acetone
- methane organic peroxide
- methane organic peroxide
- 2,5-dimethyl-2,5-di (ie / f-butylperoxy) hexane are responsible for unpleasant, strong or even aggressive odors.
- the finished products used today prepared from polypropylene or comprising polypropylene having undergone this visbreaking, also generate bad odors. These are particularly troublesome in food and automotive applications, indisposing the end users.
- the amount of these by-products in food contact materials is strictly regulated and concentration limits are set by the national bodies, such as the Food and Drug Administration, to the Member States. -United.
- organic peroxides for the implementation of the polymer in the molten state
- dialkyl peroxides such as for example di (ie / f-butylperoxy-isopropyl) -benzene, and more particularly 2,5-dimethyl-2,5-di (ie / f-butylperoxy) hexane, despite their efficiencies, and their very good properties.
- Other technical solutions are therefore preferred, generating less odors, but which are more expensive, less effective than organic peroxides used usually, and have a limited number of applications.
- odorous compositions widely used in the field of household products, such as in air fresheners and renovators, could be used to mask the smell of polypropylene resulting from visbreaking.
- the odors related to animal secretions are neutralized by compositions comprising substances having vapor pressures lower than 4 Pa at 25 ° C., such as coumarin, eugenol, the helional, or the z-citral.
- Other documents similarly mention sufficiently odorous components to cover unpleasant odors, but these are fields of application that have nothing in common with the manufacturing processes of the chemical industry (plastics) and more particularly using peroxides.
- compositions mentioned make it possible to modify the odor resulting from polymers, and in particular polypropylene extruded with organic peroxides.
- the major disadvantage of a number of the compounds used for the deodorization of ambient air is that they are too volatile. So, they lose their effectiveness, when used in an application where the polymer is operated at high temperatures, typically above 100 ° C.
- Another solution that addresses the problem of reducing the smell of polypropylene, induced by visbreaking, is to change the structure of the peroxide used.
- the aim is to reduce the amount of the product / f-butanol produced or all the volatiles generated, which are supposed to be at the origin of the bad odors, as for example in the application WO 02/12384, where the di-ie / f amino is used as organic peroxide instead of 2,5-dimethyl-2,5-di (ie / f-butylperoxy) hexane.
- di- ⁇ -amylium makes it possible to reduce the amount of ⁇ -butanol produced and to improve the odor of polypropylene. Nevertheless, this solution remains insufficient. Indeed, the safety characteristics of this component are not adapted to the extrusion environment because of the flash point deemed too low for extrusion applications, and the mutagenic character of the organic peroxide is here disqualifying.
- US patent application 2010/0324225 describes the use of cyclic peroxides, making it possible to generate fewer volatile organic compounds than 2,5-dimethyl-2,5-di (ie / f-butylperoxy) hexane, when visbreaking of polypropylene.
- certain cyclic peroxides such as 3,6,9-triethyl-3,6,9-trimethyl-1,4,7-triperoxonane, decompose at too high a temperature, causing yellowing and thermo-oxidation of the polypropylene, as well as variations in the physical and rheological properties of the polymer.
- certain cyclic ketone peroxides partially decompose during the visbreaking step, causing fluctuations in the properties of the polymer thus obtained.
- a last method used to escape the bad odors related to the visbreaking of polypropylene is to modify the polypropylene synthesis process, in order to obtain a good distribution of the molecular weight. This distribution is indirectly related to the melt index.
- this technique is expensive and the mechanical properties of the polymer obtained are not identical to those obtained during visbreaking, which restricts the subsequent applications of the polymer.
- Existing and proposed existing solutions to mask the odors emanating from polypropylene after visbreaking therefore do not meet the requirements of the market well enough, for which the dialkyl peroxides and in particular 2,5-dimethyl-2,5- di (ie / f-butylperoxy) hexane remain very efficient, because of their properties and their wide range of applications.
- the Applicant has discovered that it is possible to mask all or at least partially the odors of the polymers used in the molten state, or even to odorize them. Preferably, it is possible to mask the odor of polypropylene during its visbreaking. This odor masking thus allows easier handling and less restrictive for the user, and also allows the preparation of finished products, with less annoying odors for consumers.
- organic peroxides especially dialkyl peroxides and cyclic ketone peroxides, and more particularly 2,5-dimethyl-2,5 di (ie / f-butylperoxy) hexane, have high chemical instability with certain substances including aldehydes and ketones. In general, these substances tend to accelerate the decomposition of the organic peroxide.
- the odor masking agent used does not modify the chemical nature of the organic peroxide, thus the advantages associated with the use of organic peroxides, particularly dialkyl peroxides and cyclic ketone peroxides, and more particularly 2,5-dimethyl-2,5 di (ie / f-butylperoxy) hexane, are preserved, allowing to obtain good performance during the implementation of (s) polymer (s) in the state fade, and get a wide range of polymers, covering a large number of applications.
- the odor-masking agent loses its effectiveness when the organic peroxide is used at high temperature, ie typically at the extrusion temperatures of polymers and in particular polypropylene, or between 140 and 300 ° C and more particularly between 170 and 250 ° C for a few seconds to a few minutes maximum.
- the odor masking agent used can undergo a double cycle under these conditions. Indeed, after the step of processing the polymer in the molten state, and preferably visbreaking polypropylene, the polymer obtained is reformulated and remelted by the transformers, to obtain the final material, having various applications. However, after a second extrusion, particularly surprisingly, the odor of the polymer and especially polypropylene is still masked in whole, or at least partially by the odor masking agent according to the invention.
- the present invention relates to an organic peroxide composition
- an organic peroxide composition comprising:
- an odor-masking agent comprising at least one ketone having a number of carbon atoms greater than or equal to 8 and / or at least one aldehyde.
- the organic peroxide has a half-life temperature in one hour, between 1 10 ° C and 170 ° C;
- the organic peroxide is selected from the family of dialkyl peroxides or cyclic ketone peroxides, preferably is selected from dialkyl peroxides;
- the composition is in diluted or undiluted liquid form, in dilute or undiluted solid form, or in aqueous emulsion;
- the organic peroxide is 2,5-dimethyl-2,5-di (ie / f-butylperoxy) -hexane;
- the ratio relative organic peroxide a), preferably dialkyl peroxide, with respect to odor-masking agent b) is between 80/20 and 99.99 / 0.01 by weight, more preferably between 90 And 10 and 99/1 by weight, preferably between 95/5 and 98/2 by weight, for example 97/3 by weight;
- the ketone of the odor-masking agent is selected from the group consisting of damascones and hydroxy phenyl ketones;
- the aldehyde of the odor-masking agent is chosen from the group consisting of vanillin and the vanillin derivatives such as ethyl-vanillin, and preferably is chosen from the group consisting of vanillin and ethyl-vanillin, more preferably is ethyl-vanillin;
- the odor-masking agent further comprises at least one compound selected from the group consisting of alcohols, terpenes and mono-, di- and / or tri-esters;
- composition preferably said composition consists of the peroxide (s) and the odor-masking agent according to the present invention.
- relative ratio is understood to be the quantitative ratio of two components to each other and is calculated before the components are diluted.
- half-life temperature represents the temperature for which half of the organic peroxide has decomposed in a given time.
- dialkyl peroxides and cyclic ketone peroxides are particularly suitable for the odor-masking agent according to the invention and for the specific use mentioned here, namely the setting use of a polymer in the molten state, and more particularly for the visbreaking of polypropylene.
- the odor-masking agent according to the invention is applicable in other uses and processes, as well as with various peroxides when such odor problem (of the polymer material) is present.
- melt polymer implementation includes the processes of visbreaking, and / or crosslinking, and / or grafting polymer chains.
- polymer includes polyolefins, elastomers, thermoplastic polymers, synthetic and natural polymers, crosslinked polymers, as well as any polymer as defined in the following description.
- the invention also relates to a polymer premix composition, comprising:
- B at least one polymer as defined above, said polymer representing more than 50% by weight of the composition, preferably more than 80%, more preferably more than 90% and particularly more than 95%.
- the invention also relates to the use of the organic peroxide composition or the premix composition according to the present invention, as an agent for implementing the polymer in the molten state, preferentially for the visbreaking of polypropylene.
- the Applicant defines the term "visbreaking" used in the present invention to designate a method of rheological modification in the molten state, by splitting polymer chains, by extrusion, and in the presence of at least one organic peroxide. .
- the term "visbreaking” in particular means a modification of the thermomechanical properties, especially with a higher melt flow index, a reduced weight average molecular weight and a reduced molar mass distribution.
- the invention also relates to a manufactured product, comprising a polymer or a mixture of polymers used in the molten state, characterized in that it comprises between 1 ppm and 5% of a masking agent. odor comprising at least one ketone having a number of carbon atoms greater than or equal to 8 and / or at least one aldehyde.
- the manufactured product consists essentially of polypropylene implemented in the molten state, in particular used in the food, automotive, medical and cosmetics fields.
- the term "essentially consists of” is defined as comprising at least 50%, preferably at least 75%, and even more preferably at least 95% of a component.
- the present invention relates to an organic peroxide composition
- an organic peroxide composition comprising:
- an odor-masking agent comprising at least one ketone having a number of carbon atoms greater than or equal to 8 and / or at least one aldehyde.
- organic peroxide in a non-limiting manner, all organic peroxides well known to those skilled in the art for visbreaking, crosslinking, grafting applications. of chains. They can be used alone or in combination.
- the organic peroxide preferably dialkyl peroxide
- the organic peroxide is chosen from organic peroxides having a half-life temperature in one hour, between 1 10 ° C and 170 ° C, preferably between 120 ° C and 150 ° C, and even more preferably between 130 ° C and 150 ° C.
- the organic peroxide used is chosen from the group consisting of dialkyl peroxides, such as 2,5-dimethyl-2,5-di (ie / f-butylperoxy) hexyne-3, ie / f-butyl peroxide, di- ⁇ -amyl peroxide, ⁇ -butyl cumyl peroxide, di ( ⁇ -butylperoxyisopropyl) benzene, 2,5-dimethyl-2,5-diol di (ie / f-butylperoxy) hexane, di-cumyl peroxide, and the like; peroxides of cyclic ketones, for example 3,6,9-triethyl-3,6,9-trimethyl-1,4,7-triperoxonane, 3,3,5,7,7-pentamethyl-1,2 , 4-trioxepane, monoperoxy carbonates, such as isobutyl isopropyl monoperoxy
- dialkyl peroxides are preferred and 2,5-dimethyl-2,5-di (ie / f-butylperoxy) hexane is particularly preferred.
- the organic peroxide according to the present invention is used in diluted or undiluted liquid form, diluted or undiluted solid (in other words pure or dispersed) solid form, or in aqueous emulsion.
- the dilution of the organic peroxide can be carried out in a phlegmatizing type solvent.
- the phlegmatizers used are those well known to those skilled in the art, for example and in a nonlimiting manner, water, hydrocarbon solvents such as mineral oils, white mineral oil, isododecane, silicones. , the refined / so-pa, esters such as adipates and phthalates, oxygenated hydrocarbons, epoxidized derivatives such as epoxidized vegetable oils and the like. A mixture of one or more of them is also part of the invention.
- the organic peroxide in solid form is generally supported, in a nonlimiting manner, by any support well known to those skilled in the art, such as, for example, silica, clay, chalk, calcium carbonate. inert plasticizers, polymers such as polypropylene.
- the support is a polymer, preferably polypropylene.
- said emulsion may contain any type of additives well known to those skilled in the art such as, for example, thickeners, surfactants, antifreezes or mixtures thereof.
- the organic peroxide may comprise impurities resulting from its synthesis, for example and without limitation h ydro peroxides, chlorinated organic or inorganic species.
- the present invention provides a composition preferably comprising a major amount of at least one organic peroxide a), and a minor amount of at least one odor-masking agent b), in order not to saturate the polymer as an odor masking agent.
- the relative ratio of the organic peroxide a) with respect to the odor-masking agent b) is between 80/20 and 99.99 / 0.01 by weight, more preferably between 90/10 and 99 / 1 by weight, preferably between 95/5 and 98/2 by weight, for example 97/3 by weight.
- the odor-masking agent b) of the composition according to the present invention may comprise at least one ketone b1) having a higher number of carbon atoms or equal to 8, which may be of any type and which, advantageously, corresponds to the formula R a -CO-R b , in which R a and R b represent a hydrocarbon chain containing from 1 to 20 carbon atoms, linear, branched or cyclic, saturated or partially or totally unsaturated, optionally substituted with one or more radicals selected from hydroxy, cycloalkyl, cycloalkenyl, alkoxy, alkyl and aryl.
- the ketone b1) comprises a number of carbon atoms of between 8 and 15, preferably between 9 and 13.
- the ketone b1) is chosen from the group consisting of octanone, nonanone, decanone, undecanone, dodecanone, and preferably their substituted homologues, cyclic ketones, among which mention may be made of rambinone , menthone, ⁇ / so-menthone, ionones, irisones, methylionones, phenylethanones, benzopyranones, 1, 8-cineole, ascaridole, flavonone, damascones, damascenones, in particular delta- damascones, calone, galbascone, and hydroxyphenylketone, their substituted counterparts and mixtures thereof.
- rambinone menthone, ⁇ / so-menthone
- ionones ionones
- irisones methylionones
- benzopyranones 1, 8-cineole, ascaridole, flavonone
- the ketone is chosen from the group consisting of damascones and hydroxy phenyl ketones.
- the organic peroxide composition according to the invention comprises between 0.01 and 5% by weight, preferably between 0.1 and 3% by weight, still preferably between 0.10 and 0.5% by weight, and particularly preferably about 0.3% by weight of ketone b1).
- the odor-masking agent may comprise at least one aldehyde b2), which may be of any type and which preferably corresponds to the formula R a -CO-R b , in which R a represents a hydrocarbon chain comprising 1 to 20 carbon atoms, linear, branched or cyclic, saturated or partially or totally unsaturated, optionally substituted by one or more radicals selected from the group consisting of hydroxy, cycloalkyl, cycloalkenyl, alkoxy, alkyl and aryl, and R b represents a hydrogen atom.
- the aldehyde b2) is chosen from the group consisting of propanal, butanal, pentanal, hexanal, heptanal, octanal, nonanal, decanal, undecanal, and dodecanal.
- benzaldehyde, hydroxybenzaldehyde and its derivatives for example vanillin and vanillin derivatives, geranial, neral, citronellal, hydroxydecanal, phenylpropanal, phenylbutanal, phenylpentanal, phenylhexanal, hydroxybenzaldehydes, alkoxybenzaldehydes, and substituted homologs thereof, and mixtures thereof.
- the aldehyde b2) is selected from the group consisting of vanillin and vanillin derivatives, and preferably is selected from the group consisting of vanillin and ethyl vanillin, more preferably is the ethyl vanillin.
- Such substituted homologs of the aldehydes b2) include, but are not limited to, 3- (4-ethylphenyl) -2,2-dimethylpropanal, 3- (2-ethylphenyl) -2,2-dimethylpropanal, 7 -hydroxydecanal, 7-hydroxy-3,7-dimethyloctanal, 2-methoxybenzaldehyde and 4-methoxybenzaldehyde.
- the organic peroxide composition according to the invention comprises between 0.01 and 15% by weight, preferably between 0.1 and 5% by weight, still preferably between 0.4 and 1% by weight of aldehyde b2).
- aryl radical an aromatic hydrocarbon radical, preferably selected from the group consisting of phenyl and naphthyl, optionally substituted with one or more groups chosen preferably from alkyl, alkenyl, alkoxy, carbonyl and alkoxycarboyyl.
- aryl radical is a phenyl radical.
- substituted homologues means the aldehydes and ketones mentioned above, substituted with one or more radicals, which may be, for example, and in a nonlimiting manner, chosen from the group consisting of radicals. alkyl, hydroxy, aryl and arylalkyl.
- the odor masking agent b) may comprise at least one ketone b1) as previously described, and at least one aldehyde b2) as previously described.
- melt index of the polypropylene after visbreaking with the aid of a composition according to the present invention is comparable to that measured for polypropylene obtained after visbreaking with an organic peroxide alone, that is to say say with a composition not including odor masking agent.
- the odor-masking agent b) may further comprise at least one compound chosen from the group consisting of mono-, di- and / or tri-esters b3), alcohols b4 ), and terpenes b5).
- the mono-esters b3) may be chosen from the group consisting of:
- saturated or unsaturated C 2 -C 20 acid esters such as alkyl acetates, propionates, butyrates, methylbutyrates, pentanoates, hexanoates, heptanoates, caproates, oleates, linoleates, linolenates (linear or branched, for example ethyl, propyl, butyl, pentyl, 2-methylbutyl, isoamyl, hexyl), alkenyl (linear or branched having 3 to 12 carbon atoms), aryl (by benzyl, phenylethyl), terpene derivatives (for example menthyl, caryl), and are more particularly preferred isoamyl acetate, ethyl 2-methyl butyrate, isoamyl butyrate, phenylethyl acetate, ethyl caproate, benzyl acetate, hexyl,
- cyclic esters or lactones also called alkanolides, in which the ester is in a ring comprising from 4 to 7 bonds, said ring possibly containing unsaturation and / or being substituted by a linear or branched, saturated or unsaturated side chain, or by another cycle and advantageously by an aromatic cycle.
- the cyclic esters as defined above are advantageously chosen from ⁇ -lactones, ⁇ -butyrolactones, ⁇ -valerolactones in their enantiomeric form R or S (or as a mixture) and pyranones and benzopyranones and mixtures thereof.
- the di- and tri-esters b3) are advantageously chosen from the group consisting of orf / 70-phthalates, such as diethyl orino phthalate; citrates, such as triethyl citrate; and malonates, such as diethyl malonate, and mixtures thereof.
- ester b3) is chosen from lactones and citrates.
- the odor-masking agent b) may also comprise at least one alcohol b4) which may be of any type and advantageously chosen from monoalcohols comprising from 1 to 40 carbon atoms, preferably from 3 to 35 carbon atoms, more preferably 6 to 20 carbon atoms, said carbon atoms forming a linear or branched chain optionally comprising one or more unsaturation (s) in the form of double bond (s), and optionally comprising one or more cyclic structure (s) comprising from 3 to 6 members, saturated, or totally or partially unsaturated.
- monoalcohols comprising from 1 to 40 carbon atoms, preferably from 3 to 35 carbon atoms, more preferably 6 to 20 carbon atoms, said carbon atoms forming a linear or branched chain optionally comprising one or more unsaturation (s) in the form of double bond (s), and optionally comprising one or more cyclic structure (s) comprising from 3 to 6 members, saturated, or totally or partially unsaturated.
- the alcohols b4) previously defined are preferably monoalcohols, the hydroxyl function being preferably carried by a carbon atom included in a ring structure as defined above or by a carbon atom included in a chain directly connected to a structure. cyclic.
- the alcohols b4) used in the odor-masking agent b), as defined above, are advantageously chosen from the group consisting of menthol, neo-menthol, phenylethyl alcohol, a phenol substituted with one or more alkoxy groups, benzyl alcohol, javanol, citronellol, dihydromyrcenol, dihydroterpineol, dimetol, ethyl-linalool, geraniol, linalool, tetrahydrolinalol, tetrahydromyrcenol and nerol.
- the alcohol b4) chosen may be an alcohol containing an aryl radical, preferably still a primary alcohol comprising an aryl radical, and in a completely different manner particularly preferred hydroxy-alkylbenzene, for example selected from the group consisting of benzyl alcohol, phenylethanol, propylethanol and butylethanol.
- the aryl radical is a phenyl radical.
- the phenol substituted with one or more alkoxy (alkoxyphenol) groups may preferably be chosen from the group consisting of 2-methoxyphenol, and in particular substituted in the 4-position by an alkyl or alkenyl radical, where alkyl and alkenyl comprise the methyl, ethyl, propyl, butyl, pentyl, hexyl, propenyl, butenyl, pentenyl and hexenyl radicals, and their isomers.
- the alcohol b4) is chosen from the group consisting of javanol and methoxyalkylphenols.
- the alcohol b4) is chosen from the group consisting of javanol and methoxyalkylphenols and the ester b3) is chosen from lactones and citrates.
- the odor masking agent may optionally comprise at least one terpene b5) among those well known to those skilled in the art, such as for example and without limitation, terpinenes, myrcene, limonene, terpinolene , pinenes, sabinene, camphene, and others, mixtures of two or more of them, as well as terpenes-based essences, especially those containing these ingredients.
- terpene b5 those well known to those skilled in the art, such as for example and without limitation, terpinenes, myrcene, limonene, terpinolene , pinenes, sabinene, camphene, and others, mixtures of two or more of them, as well as terpenes-based essences, especially those containing these ingredients.
- the odor-masking agent used in the composition of the present invention is chosen from odor-masking agents comprising:
- the odor-masking agent used in the composition of the present invention is chosen from odor-masking agents which comprise:
- At least one component b2), at least one component b4), and at least one component b5) are at least one component b2), at least one component b4), and at least one component b5).
- the amount of ketone (s) b1) in the odor-masking agent b) may be equal to 100%, in the case where the odor-masking agent does not comprise aldehyde.
- the amount of ketone (s) b1) is less than 100%, advantageously between 0% and 20%, preferably between 5% and 15% by weight relative to the total weight of the odor-masking agent, preferentially between 10% and 15%.
- the quantity of aldehyde (s) b2) in the odor-masking agent b) may be equal to 100%, in the case where the odor-masking agent does not comprise a ketone.
- the amount of aldehyde (s) b2) is less than 100%, advantageously between 0% and 50%, preferably between 10% and 40%, and still more preferably between 10 and 20% by weight relative to the total weight. odor masking agent.
- the amount of mono-, di- and / or tri-esters b3) in the odor-masking agent b) is generally between 0% and 80%, preferably between 10% and 70%, preferably between 30% and 70%, and even more preferably between 30% and 40% by weight relative to the total weight of the odor-masking agent.
- the amount of alcohol b4) in the odor-masking agent a) is generally between 0% and 20%, preferably between 5% and 15%, by weight relative to the total weight of the masking agent of smell.
- the amount of terpene b5) in the odor-masking agent is generally between 0% and 20%, preferably between 0% and 15%, and still more preferably between 0% and 5% by weight per relative to the total weight of the odor masking agent.
- the mono-, di-, tri-esters added to said composition allow the complement up to 100% of the odor masking agent.
- the odor-masking agent consists of at least one, at least two, at least 3, at least 4, or all of the compounds b1), b2), b3), b4) , b5), preferably to the exclusion of any other compound.
- the odor masking agent used in the context of the present invention may include, if necessary, in minority amounts, other fragrances, usually used in the field of perfumery, such as fatty acids, glycols. , ethers, and other agents well known to those skilled in the art.
- the odor masking agent as described above may, if necessary, if necessary, in minority amounts, further comprise one or more additives commonly used in the field.
- additives may for example be selected from the group consisting of solvents, antioxidants, stabilizers, pigments, dyes, preservatives, biocides and the mixture of two or more thereof.
- these compounds are not degradation residues resulting from the reaction of organic peroxide with the polymer, and in particular with polypropylene.
- the amount of masking agent b) can vary in large proportions, depending on the desired effect, depending on the intensity of the odor to be masked, depending on the residual contents of the various impurities contained respectively in the organic peroxide a) and odor masking agent b), and the like. Amounts of masking agent less than a few ppm may be too low to achieve the desired effect. Amounts of odor masking agent above 15% can be prohibitive from an economic point of view, or have adverse effects depending on the intended applications.
- the amount of odor-masking agent b) is between 0.01 and 15% by weight, limits included, relative to the total weight of the organic peroxide composition such as as described in the invention, preferably between 0.5% and 10% by weight, limits included, preferably between 1% and 6% by weight, limits included, for example about 2.5% by weight.
- composition according to the present invention may be prepared according to any method known to those skilled in the art, for example by simply combining at least one organic peroxide a) with at least one masking agent of odor b), or vice versa. versa, possibly with stirring and / or possibly heating.
- the preparation of the composition according to the invention may for example be carried out under atmospheric pressure, at a temperature between 0 ° C and 100 ° C, preferably the temperature is below the decomposition temperatures of the organic peroxide or peroxides used.
- the process for preparing said composition mentioned above can be carried out batchwise (batch process) or continuously.
- said composition consists of at least one organic peroxide and the odor masking agent.
- composition as described above may, if necessary, or if necessary, further comprise one or more additives commonly used in the field.
- additives may for example be selected from the group consisting of solvents, antioxidants, lubricants, stabilizers, pigments, plasticizers, dyes, preservatives, biocides, foaming agents, nucleating agents mineral fillers, anti-static agents, emulsifiers, thickeners and anti-freeze agents.
- composition may be in all forms well known to those skilled in the art, for example, it may be in liquid form, diluted or undiluted, or dilute or undiluted solid sub-form, or in aqueous emulsion.
- the composition when in solid form, it can in particular be supported on a solid phase of polymer, polypropylene, calcium carbonate, silica, talc and the like.
- the support is polypropylene.
- composition When the composition is diluted, it is preferably diluted in a solvent and more preferably in a phlegmatizer, such as those previously described.
- the present invention also relates to a polymer premix composition, comprising:
- polymer in a non-limiting manner, all polymers well known to those skilled in the art, which can be implemented in the molten state.
- said at least one polymer is selected from the group consisting of polyolefins, elastomers, natural or synthetic, thermoplastic polymers and thermoplastic elastomers.
- said at least one polymer is selected from the group consisting of low density and high density linear polyethylene, chlorinated polyethylene, terpolymers of ethylenepropylene-diene (EPDM), vulcanized thermoplastics ("TPV").
- EPDM ethylenepropylene-diene
- TPV vulcanized thermoplastics
- polypropylene-EPDM systems ethylene-vinyl acetate copolymers, ethylene propylene copolymers, silicone rubber, natural rubber (NR), polyisoprene (IR), polybutadiene (BR) , acrylonitrile-butadiene copolymers (NBR), styrene-butadiene copolymers (SBR), polyethylene terephthalate, polybutylene polyterephthalate, chlorosulfonated polyethylene, fluoroelastomers, ethylene-methyl (meth) acrylate copolymers and copolymers of ethylene-glycidyl methacrylate, polylactic acid
- polypropylene refers to polymers and / or polymer mixture comprising at least 50% by weight of polymerized propylene, such as for example homopolymers, copolymers, terpolymers of propylene.
- the polymerization with other monomers than propylene includes but is not limited to other olefins (such as ethylene, butene, pentene), other unsaturated olefinic monomers, acrylates, styrene, styrene derivatives, acrylonitrile, vinyl acetate, vinylidene chloride and vinyl chloride. Preference is given to polypropylene homopolymerized or copolymerized with ethylene to less than 10% by weight of ethylene.
- the polymer of the polymeric premix composition is polypropylene.
- the polymer premix composition as described above may, if necessary, or if necessary, further comprise one or more additives commonly used in the field.
- additives may for example be selected from the group consisting of solvents, antioxidants, lubricants, stabilizers, pigments, plasticizers, dyes, preservatives, biocides, foaming agents, nucleating agents, mineral fillers, anti-oxidizing agents, static, crosslinking agents, plasticizers and inert fillers (such as silica, talc, chalk, coal, fibers and calcium carbonate).
- additives may be used and may in particular be chosen from the group consisting of stable free radicals (for example nitroxide derivatives), chain transfer agents. , (such as thiols), disulphides, and functional monomers (such as, but not limited to, carboxylic acids and their derivatives, anhydrides, esters, acid chlorides, isocyanates, oxazolines epoxides, amines or hydroxides).
- stable free radicals for example nitroxide derivatives
- chain transfer agents such as thiols
- disulphides such as thiols
- functional monomers such as, but not limited to, carboxylic acids and their derivatives, anhydrides, esters, acid chlorides, isocyanates, oxazolines epoxides, amines or hydroxides.
- additives such as stable free radicals, as described above, and crosslinking promoters, such as, for example, compounds containing at least one double bond that may be bifunctional or polyfunctional, such as bifunctional vinyl monomers, bifunctional allyl monomers, polyfunctional vinyl monomers, or polyfunctional allyl monomers are used.
- the subject of the present invention is also the use of said peroxide composition and / or of said polymer premix composition, as an agent for implementing the polymer as defined above at the same time.
- molten state preferably for the visbreaking of polypropylene.
- the polymer mentioned above is a priori already contained in the mixture to be melted, but in the case of the peroxide composition, it is add at least one polymer to the latter before or during mixing which is carried out in the molten state.
- the expression "as an agent for implementing the polymer in the molten state” can be understood as the fact that the assembly constituted by the (s) peroxide (s) and the odor-masking agent is used to carry out its dedicated function, preferably the visbreaking, with the polymer (s) considered, possibly belonging to the aforementioned premix composition .
- this dedicated function of the above-mentioned group peroxide (s) + masking agent
- organic peroxides are widely used in the crosslinking of polymers (rubbers, polyethylene). But the mechanisms of decomposition of peroxides can lead to annoying olfactory byproducts for the final properties. This is the case for example for rubbers to be used in automobile interiors. They are also used in the polypropylene manufacturing process.
- the melt index or MFI of the odorised polypropylene is not modified and / or influenced by the amount of odor-masking agent added to the composition. of organic peroxide.
- the crosslinking density of the polymer is not modified and / or influenced by the amount of odor-masking agent added to the organic peroxide composition.
- the present invention also relates to a manufactured product, comprising at least one polymer used in the molten state, characterized in that it comprises between 1 ppm and 5% by weight, of an odor masking agent as defined above.
- the manufactured product consists essentially of polypropylene.
- said manufactured product comprises between 1 ppm and 1% by weight, more preferably between 1 ppm and 500 ppm by weight, and even more preferably between 1 ppm and 100 ppm by weight of said odor masking agent.
- said manufactured products consist essentially of polypropylene implemented in the molten state, in particular used in the food, automotive, medical and cosmetics fields.
- the present invention relates to a process for the melt processing of a polymer, in particular a process for visbreaking a polymer, in particular polypropylene, comprising:
- said process also comprises a step b) of heating the mixture or premix of step a) at a temperature of between 130 ° C. and 250 ° C., preferably between 180 ° C. and 230 ° C. .
- the visbreaking process is a method well known to those skilled in the art.
- the visbreaking process of polypropylene does not change anything except that in the present invention, a masking agent is mixed with at least one organic peroxide.
- the present invention also relates to a product obtained by the polypropylene visbreaking process as described above, as well as to a manufactured product comprising said product obtained by the visbreaking process.
- the process for converting polypropylene into a manufactured product is also well known to those skilled in the art, including in particular, but not limited to, extrusion, injection, extrusion blow molding and thermoforming steps. , expansion (foam) and others.
- said transformation process does not change anything, except that in the present invention, there is a question of polypropylene comprising between 1 ppm and 5% odor masking agent. comprising at least one minus one ketone having a number of carbon atoms greater than or equal to 8 and / or at least one aldehyde.
- the percentages are by weight, unless otherwise specifically indicated.
- the percentages of components a) and b) are percentages by weight expressed relative to the total weight of the organic peroxide composition.
- the percentages of the components of the odor-masking agent b) are percentages by weight expressed relative to the total weight of the odor-masking agent. Unless otherwise stated, "ppm" means part per million by weight.
- the percentages of the components of the polymer premix composition are percentages by weight expressed by weight relative to the total weight of the premix composition.
- aqueous emulsions according to the present invention were carried out with 2,5-dimethyl-2,5-di (ie / f-butylperoxyhexane) or di-di / butyl peroxide, and it is understood that other organic peroxides and especially other dialkyl peroxides have been tested and show results substantially similar to those presented here.
- composition according to the invention (comprising the organic peroxide and the odor-masking agent) is prepared at room temperature, with stirring of between 100 and 500 rpm, for 5 to 30 minutes, up to that the mixture is well homogenized.
- This composition is then introduced onto the polypropylene powder, at room temperature, in a Caccia powder mixer type CP0010G, at a mixing intensity of between 7-8 A, for 7 minutes.
- the temperature does not exceed 30 ° C.
- the polypropylene used is Moplen ® HF 400G from Basell with a Melt Flow Index (MFI) at 190 ° C. under 2.16 kg of load of 1 g / 10 min.
- MFI Melt Flow Index
- the powder is then extruded into granules (cutting in the form of granules) on a Brabender KDSE type extruder at a melt temperature of 237 ⁇ 3 ° C. at a flow rate of 8.4 kg / h.
- the test for measuring the melt index is carried out according to ISO 1133 at a temperature of 190 ° C under a weight of 2160 grams.
- the die has a length of 8 mm and an inside diameter of 2.095 mm.
- the number of crosses given by the panelists ranges from 1 (the most unpleasant odor, although it may be acceptable with regard to the criteria of acceptability of a consumer public) to 4 (the most pleasant odor).
- the sign (-) is used to describe a very unpleasant or disqualifying odor with regard to the criteria of acceptability of a consumer public.
- Example 1 Odor and melt flow rate (MFI) test of PP after extrusion in the presence of 2,5-dimethyl-2,5-di (tert-butylperoxyhexane) and odor masking agents
- the odor-masking agent is incorporated at a concentration of 10.4% by weight relative to the organic peroxide (ie 9.4% by weight of masking agent in the composition and 90.6% by weight of organic peroxide) and at a concentration of final concentration in polypropylene (PP) of 100 ppm.
- each ingredient has a relative final concentration of 10.4% organic peroxide and 100% polypropylene.
- n ppm The organic peroxide is 2,5-dimethyl-2,5-di (ie / f-butylperoxyhexane) as defined above.
- the composition comprising the odor-masking agent and 2,5-dimethyl-2,5-di (ie / f-butylperoxyhexane) is introduced into the polypropylene at a concentration of 1060 ppm.
- the set of fragrances tested here can modify the smell of polypropylene, making it less intense.
- the combination of components with different chemical natures is more advantageous.
- Example 2 Odor and melt flow index test (MFI) of PP after extrusion in the presence of 2,5-dimethyl-2,5-di (tert-butylperoxyhexane) and aldehyde (s) [0144]
- the odor masking agent is incorporated at a concentration of between 0.6% and 10% by relative weight, based on the organic peroxide.
- the organic peroxide used is 2,5-dimethyl-2,5-di (ie / f-butylperoxyhexane) and the final concentration of the peroxide composition in the polypropylene therefore varies between 960 and 1060 ppm.
- Vanillin or ethyl vanillin mixtures allow to have a sweet smell reminiscent of that of vanilla.
- the citral / citronellal blend also has good ability to mask the awkward "hot glue” or polypropylene butyl acetate odor, noticeable in the absence of odor masking agent.
- Example 3 Odor and melt flow rate (MFI) test of the PP after extrusion in the presence of 2,5-dimethyl-2,5-di (tert-butylperoxyhexane) and odor masking agents C1 and C2
- the odor-masking agent C1 or C2 is incorporated at a concentration of between 0.6% and 10% by weight relative to the organic peroxide.
- the organic peroxide used is 2,5-dimethyl-2,5-di (ie / f-butylperoxyhexane) and the Final concentration of the peroxide composition in the polypropylene therefore ranges from 960 to 1060 ppm.
- Odor masking agent compositions tested are denoted C1 and C2 and comprise a mixture of ketones, aldehydes, esters, alcohols, as described in the present invention.
- C1 comprises:
- C2 comprises:
- the two peroxide compositions respectively comprising odor masking agents C1 and C2, provide a fruity and sweet odor that can mask the irritating and annoying odor of "hot glue" or butyl acetate.
- odor masking agents are particularly effective since their effectiveness is demonstrated at 1, 2% or 2.6% in the organic peroxide.
- melt flow index varies very little. This means that the addition of odor masking agent does not influence the MFI, so the polypropylene molar mass characteristics remain in all likelihood, unchanged.
- Example 4 Odor and melt flow rate (MFI) test of the PP after a second extrusion in the presence of 2,5-dimethyl-2,5-di (tert-butylperoxyhexane) and masking agents odour
- the odor masking agents C1 and C2 are effective and help maintain the persistence of pleasant odor, even after a second extrusion. This is less the case with the citronellal / vanillin mixture.
- Example 5 Odor and melt flow rate (MFI) test of PP after extrusion in the presence of di-tert-butyl peroxide and odor masking agents
- the odor masking agents C1 or C2 of Example 3 were tested with another organic peroxide: di-di / n-butyl peroxide. Each odor-masking agent is incorporated at a concentration of between 1.2% and 3.1% by weight relative to the organic peroxide. The final concentration of the composition in the polypropylene therefore varies from 960 to 990 ppm.
- compositions C1 and C2 used with di-ie / f-butyl peroxide can advantageously modify the smell of polypropylene with sweet and fruity notes.
- the use of the citronellal / vanillin mixture as an odor-masking agent with this peroxide shows a modification of the odor of the less important polypropylene. In the absence of odor masking agent, an unpleasant odor because irritant is noticeable.
- Example 6 Stability test of 2,5-dimethyl-2,5-di (tert-butylperoxyhexane) in the presence of odor-masking agents
- Organic peroxides being particularly unstable and capable of chemically reacting with various compounds (aldehydes, ketones, etc.), it is important to ensure the chemical inertness between the odor-masking agent and the peroxide. organic, especially over time, during the storage of organic peroxide.
- the following data show a very good concentration stability of the organic peroxide for 2,5-dimethyl-2,5-di (ie / f-butylperoxyhexane) in the presence of odor masking agents, as defined. in the context of the present invention.
- the storage was carried out for 12 months, at a temperature of + 18 ° C. and the concentration of 2,5-dimethyl-2,5-di (ieri-butylperoxyhexane) is measured by liquid chromatography.
- composition of the samples is as follows:
- Example 7 Odor and crosslinking density test of PE in the presence of organic peroxides and odor masking agents
- the fragrance of composition C1 of Example 3 is used in combination with one or other of the organic peroxides.
- the crosslinking density is measured from the films made on the roller mixer.
- the crosslinking density meter is an Alpha Technologies RPA 2000 rheometer, the temperature is 200 ° C.
- Odor test [0162] To carry out the olfactory test, a methodology similar to that used on polypropylene is used. The difference is that the crosslinked plate is difficult to cut so it is placed entirely in a sealed glass bottle, and is placed in an oven at 60 ° C for 4 hours.
- the two peroxide compositions comprising C1 and 2,5-dimethyl-2,5-di (ie / f-butylperoxyhexane) and di-di / f-butyl peroxide respectively, provide a fruity and sweet odor. This odor masks the irritating and annoying odor of cross-linked polyethylene.
- the amount of odor masking agent added to the organic peroxide does not affect the crosslinking density of the polyethylene.
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Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1651069A FR3047485A1 (fr) | 2016-02-10 | 2016-02-10 | Compositions de peroxydes organiques et pre- melange polymere |
| PCT/FR2017/050311 WO2017137710A1 (fr) | 2016-02-10 | 2017-02-10 | Composition de peroxydes organiques et pré-melange polymère |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3414269A1 true EP3414269A1 (fr) | 2018-12-19 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17709142.8A Withdrawn EP3414269A1 (fr) | 2016-02-10 | 2017-02-10 | Composition de peroxydes organiques et pré-melange polymère |
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| Country | Link |
|---|---|
| EP (1) | EP3414269A1 (fr) |
| FR (1) | FR3047485A1 (fr) |
| WO (1) | WO2017137710A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3073224B1 (fr) * | 2017-11-08 | 2020-05-22 | Arkema France | Utilisation de peroxyde d'hydrogene sous forme solide pour modifier la rheologie a l'etat fondu d'un polymere thermoplastique |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1345877A (fr) * | 1961-12-30 | 1963-12-13 | Degussa | Procédé de préparation de corps moulés en polyéthylène réticule |
| FR2599257B1 (fr) | 1986-05-29 | 1989-12-29 | Robertet Sa | Agent neutralisant les odeurs desagreables des excretions et excrements des animaux. |
| US5017661A (en) | 1990-02-12 | 1991-05-21 | Phillips Petroleum Company | Process for reducing the level of t-butyl alcohol (TBA) in visbroken polyolefins |
| JP2001089645A (ja) * | 1999-09-20 | 2001-04-03 | Nof Corp | ペルオキシド組成物及びその用途 |
| US20040159972A1 (en) | 2000-08-04 | 2004-08-19 | Koschmieder Stefan U. | Propylene polymers having agreeable odor characteristics and shaped articles thereof |
| KR20120052905A (ko) | 2009-06-23 | 2012-05-24 | 다우 글로벌 테크놀로지스 엘엘씨 | 레올로지가 조절된 폴리프로필렌 |
| FR2971510B1 (fr) * | 2011-02-10 | 2013-03-22 | Arkema France | Polymerisation radicalaire de l'ethylene amorcee par des peroxydes organiques a haute productivite |
| CN102719025B (zh) * | 2012-07-05 | 2013-12-18 | 上海众力投资发展有限公司 | 一种耐高温无臭味过氧化物橡胶组合物及其制备方法 |
-
2016
- 2016-02-10 FR FR1651069A patent/FR3047485A1/fr not_active Withdrawn
-
2017
- 2017-02-10 WO PCT/FR2017/050311 patent/WO2017137710A1/fr not_active Ceased
- 2017-02-10 EP EP17709142.8A patent/EP3414269A1/fr not_active Withdrawn
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| Publication number | Publication date |
|---|---|
| FR3047485A1 (fr) | 2017-08-11 |
| WO2017137710A1 (fr) | 2017-08-17 |
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