EP4217209A1 - Verfahren zur gewinnung von naturkautschuk, kautschukzusammensetzung mit naturkautschuk und deren verwendung - Google Patents
Verfahren zur gewinnung von naturkautschuk, kautschukzusammensetzung mit naturkautschuk und deren verwendungInfo
- Publication number
- EP4217209A1 EP4217209A1 EP21782649.4A EP21782649A EP4217209A1 EP 4217209 A1 EP4217209 A1 EP 4217209A1 EP 21782649 A EP21782649 A EP 21782649A EP 4217209 A1 EP4217209 A1 EP 4217209A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rubber
- natural rubber
- saghyz
- plant
- aging agent
- 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.)
- Pending
Links
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- 239000005060 rubber Substances 0.000 title claims abstract description 90
- 239000000203 mixture Substances 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title claims abstract description 56
- 230000008569 process Effects 0.000 title abstract description 15
- 230000032683 aging Effects 0.000 claims abstract description 20
- 241000196324 Embryophyta Species 0.000 claims description 133
- 230000003712 anti-aging effect Effects 0.000 claims description 67
- 239000003795 chemical substances by application Substances 0.000 claims description 67
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- 235000018704 Scorzonera hispanica Nutrition 0.000 claims description 25
- 229920000642 polymer Polymers 0.000 claims description 25
- 241000341871 Taraxacum kok-saghyz Species 0.000 claims description 21
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- GVJHHUAWPYXKBD-UHFFFAOYSA-N (±)-α-Tocopherol Chemical compound OC1=C(C)C(C)=C2OC(CCCC(C)CCCC(C)CCCC(C)C)(C)CCC2=C1C GVJHHUAWPYXKBD-UHFFFAOYSA-N 0.000 claims description 18
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- JYJIGFIDKWBXDU-MNNPPOADSA-N inulin Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)OC[C@]1(OC[C@]2(OC[C@]3(OC[C@]4(OC[C@]5(OC[C@]6(OC[C@]7(OC[C@]8(OC[C@]9(OC[C@]%10(OC[C@]%11(OC[C@]%12(OC[C@]%13(OC[C@]%14(OC[C@]%15(OC[C@]%16(OC[C@]%17(OC[C@]%18(OC[C@]%19(OC[C@]%20(OC[C@]%21(OC[C@]%22(OC[C@]%23(OC[C@]%24(OC[C@]%25(OC[C@]%26(OC[C@]%27(OC[C@]%28(OC[C@]%29(OC[C@]%30(OC[C@]%31(OC[C@]%32(OC[C@]%33(OC[C@]%34(OC[C@]%35(OC[C@]%36(O[C@@H]%37[C@@H]([C@@H](O)[C@H](O)[C@@H](CO)O%37)O)[C@H]([C@H](O)[C@@H](CO)O%36)O)[C@H]([C@H](O)[C@@H](CO)O%35)O)[C@H]([C@H](O)[C@@H](CO)O%34)O)[C@H]([C@H](O)[C@@H](CO)O%33)O)[C@H]([C@H](O)[C@@H](CO)O%32)O)[C@H]([C@H](O)[C@@H](CO)O%31)O)[C@H]([C@H](O)[C@@H](CO)O%30)O)[C@H]([C@H](O)[C@@H](CO)O%29)O)[C@H]([C@H](O)[C@@H](CO)O%28)O)[C@H]([C@H](O)[C@@H](CO)O%27)O)[C@H]([C@H](O)[C@@H](CO)O%26)O)[C@H]([C@H](O)[C@@H](CO)O%25)O)[C@H]([C@H](O)[C@@H](CO)O%24)O)[C@H]([C@H](O)[C@@H](CO)O%23)O)[C@H]([C@H](O)[C@@H](CO)O%22)O)[C@H]([C@H](O)[C@@H](CO)O%21)O)[C@H]([C@H](O)[C@@H](CO)O%20)O)[C@H]([C@H](O)[C@@H](CO)O%19)O)[C@H]([C@H](O)[C@@H](CO)O%18)O)[C@H]([C@H](O)[C@@H](CO)O%17)O)[C@H]([C@H](O)[C@@H](CO)O%16)O)[C@H]([C@H](O)[C@@H](CO)O%15)O)[C@H]([C@H](O)[C@@H](CO)O%14)O)[C@H]([C@H](O)[C@@H](CO)O%13)O)[C@H]([C@H](O)[C@@H](CO)O%12)O)[C@H]([C@H](O)[C@@H](CO)O%11)O)[C@H]([C@H](O)[C@@H](CO)O%10)O)[C@H]([C@H](O)[C@@H](CO)O9)O)[C@H]([C@H](O)[C@@H](CO)O8)O)[C@H]([C@H](O)[C@@H](CO)O7)O)[C@H]([C@H](O)[C@@H](CO)O6)O)[C@H]([C@H](O)[C@@H](CO)O5)O)[C@H]([C@H](O)[C@@H](CO)O4)O)[C@H]([C@H](O)[C@@H](CO)O3)O)[C@H]([C@H](O)[C@@H](CO)O2)O)[C@@H](O)[C@H](O)[C@@H](CO)O1 JYJIGFIDKWBXDU-MNNPPOADSA-N 0.000 description 1
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- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 150000002632 lipids Chemical class 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 235000012245 magnesium oxide Nutrition 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000010077 mastication Methods 0.000 description 1
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- 239000011707 mineral Substances 0.000 description 1
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- 239000001301 oxygen Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 125000000951 phenoxy group Chemical group [H]C1=C([H])C([H])=C(O*)C([H])=C1[H] 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 150000004986 phenylenediamines Chemical class 0.000 description 1
- 229920000636 poly(norbornene) polymer Polymers 0.000 description 1
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- PXQLVRUNWNTZOS-UHFFFAOYSA-N sulfanyl Chemical class [SH] PXQLVRUNWNTZOS-UHFFFAOYSA-N 0.000 description 1
- 239000011885 synergistic combination Substances 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 150000003505 terpenes Chemical class 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- RYYWUUFWQRZTIU-UHFFFAOYSA-K thiophosphate Chemical compound [O-]P([O-])([O-])=S RYYWUUFWQRZTIU-UHFFFAOYSA-K 0.000 description 1
- KUAZQDVKQLNFPE-UHFFFAOYSA-N thiram Chemical compound CN(C)C(=S)SSC(=S)N(C)C KUAZQDVKQLNFPE-UHFFFAOYSA-N 0.000 description 1
- 229960002447 thiram Drugs 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 229920003212 trans-1,4-polyisoprene Polymers 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- 150000003712 vitamin E derivatives Chemical class 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 235000014692 zinc oxide Nutrition 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08C1/00—Treatment of rubber latex
- C08C1/14—Coagulation
- C08C1/15—Coagulation characterised by the coagulants used
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08C1/00—Treatment of rubber latex
- C08C1/14—Coagulation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
- B60C1/0016—Compositions of the tread
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
- B60C1/0025—Compositions of the sidewalls
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08C1/00—Treatment of rubber latex
- C08C1/02—Chemical or physical treatment of rubber latex before or during concentration
- C08C1/06—Preservation of rubber latex
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08C3/00—Treatment of coagulated rubber
- C08C3/02—Purification
-
- 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
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/02—Organic and inorganic ingredients
-
- 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
- C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
- C08K5/005—Stabilisers against oxidation, heat, light, ozone
-
- 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
- C08K5/13—Phenols; Phenolates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L7/00—Compositions of natural rubber
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/06—Sulfur
-
- 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
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
-
- 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
- C08K5/16—Nitrogen-containing compounds
- C08K5/17—Amines; Quaternary ammonium compounds
- C08K5/18—Amines; Quaternary ammonium compounds with aromatically bound amino groups
-
- 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
- C08K5/16—Nitrogen-containing compounds
- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/3412—Heterocyclic compounds having nitrogen in the ring having one nitrogen atom in the ring
- C08K5/3432—Six-membered rings
- C08K5/3437—Six-membered rings condensed with carbocyclic rings
-
- 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
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
- C08K5/45—Heterocyclic compounds having sulfur in the ring
- C08K5/46—Heterocyclic compounds having sulfur in the ring with oxygen or nitrogen in the ring
- C08K5/47—Thiazoles
Definitions
- the present invention relates to a process for obtaining aging-resistant natural rubber, a rubber composition which contains the natural rubber obtained in this way and the use of this composition for the production of consumer goods.
- natural rubber was mainly obtained from rubber trees of the Hevea genus, in particular from Hevea brasiliensis, a plant species that is mainly cultivated in Asia.
- the dandelion (Taraxacum sp.), in particular the Russian dandelion (Taraxacum kok-saghyz, also Taraxacum koksaghyz), is known as a suitable alternative for obtaining natural rubber.
- a natural rubber very similar to that from Hevea species can also be obtained from guayule (Parthenium argenatatum) be won.
- Natural rubber from Hevea is known to contain a relatively high proportion of proteins and other cell components or biomolecules in addition to the rubber polymers. These components, which come from the original plant, give the natural rubber good quality and natural protection against aging, but some of these components are also known to trigger allergies in humans.
- synthetic rubber which is usually free of proteins and other cell components, the addition of anti-aging agents is common and a large number of suitable anti-aging agents are known. Examples of suitable anti-aging agents are in DE19818564A1, LIS2010063189A,
- US4,568,711 also discloses a synergistic combination of two antioxidants for guayule-derived natural rubber.
- the object of the present invention was to provide a method with which aging-resistant natural rubber can be produced.
- the method described here is a method for obtaining aging-resistant natural rubber, in which, at an early point in time during the extraction of the natural rubber from the plants, an anti-aging agent is mixed with the obtained plant sap or its (if necessary previously separated, possibly already cleaned) ingredients, in particular with is brought into contact with the natural polyisoprenes before the natural rubber has (completely) dried.
- the method comprises a step (I) in which a plant material is provided which contains a polymer-containing plant sap, this plant sap containing at least natural polyisoprenes, in particular cis-1,4-polyisoprenes.
- plant material is meant a whole plant of one genus described herein, multiple plants of one genus described herein, multiple plants of different genera described herein, part of a plant of one described genus or several parts of a plant of a genus described here, a part of plants of several genera (e.g. the root, respectively the leaves) or several parts of plants of several genera described here.
- Plant juice always contains - in addition to water - at least one, preferably a plurality of ingredients typical of the plants. Plant sap containing natural polyisoprenes as polymers is used for the application in the process according to the invention. It is therefore polyisoprene-containing plant material.
- this polymer-containing plant sap or at least its ingredients, in particular the natural polyisoprenes, is obtained from the plant material (also referred to here as extraction).
- the natural rubber contained in the plant sap can already be coagulated in the plant material before extraction.
- the extraction of the plant sap and/or its ingredients can be done in any suitable way that causes the sap contained in the plant material and/or its ingredients, in particular at least a preferred part of the ingredients, such as the natural polyisoprenes, to escape from the plant material/ can exit and be won.
- Extraction processes for obtaining the plant sap and/or its ingredients, in particular the natural polyisoprenes can include at least one of the following process steps: chopping up the plants or plant parts, crushing the plant material, opening up the plant material by mechanical, chemical or thermal treatment, squeezing the plant material, Heating the plant material and/or the plant sap and/or its ingredients, adding an aqueous solution to the plant material/plant sap and/or its ingredients, adding the plant material Spores of a fungus that decomposes the plant material, in particular Phytophthora infestans, adding at least one chemical compound, preferably an organic acid, to the plant material/plant sap and/or its ingredients, aerobic or anaerobic fermentation of the plant material and/or separating solids and liquid phase.
- the plant material/plant sap and/or its ingredients are not mixed with an enzyme before the natural polyisoprenes are coagulated; preferably, no enzyme is added to the mixture during the entire polyisoprene production process described here.
- the natural polyisoprene can be either cis-1,4-polyisoprene or trans-1,4-polyisoprene.
- Natural rubber is preferably essentially cis-1,4-polyisoprene, with the cis-1,4 proportion in the natural rubber polymers often being greater than 99% by weight.
- the plant sap obtained and/or its ingredients in particular the natural polyisoprenes, is/are brought into contact with at least one anti-aging agent.
- the plant sap and/or its ingredients can be brought into contact with the anti-aging agent in this case by the plant material already being in contact with the anti-aging agent before it is extracted, for example by placing the plants in an aqueous solution or water which/ containing the anti-aging agent by wetting the plants with the anti-aging agent in liquid form, or by adding the anti-aging agent as a solid to the plant material before this plant material is digested.
- the anti-aging agent during the opening of the plant material for example by mechanical, chemical or thermal processing of the Plant material can be added in solid, liquid or dissolved form.
- the anti-aging agent can also be brought into contact with the plant material after the plant sap and/or its ingredients have escaped from the plant material.
- a later addition of the anti-aging agent to the plant sap and / or its ingredients is possible, for example before, during or after the process step (IV) described below, or before or during the process step (V) described below, but according to the invention before the natural rubber has dried. It is thus provided according to the invention that the natural rubber obtained from the plant material has already been brought into contact with anti-ageing agent(s) before and/or at the latest during drying, ie anti-aging agent has been added to it during drying. It is preferred that the anti-aging agent has been contacted with the natural rubber prior to drying.
- the anti-aging agent(s) comes into contact with the plant sap and/or its ingredients, in particular with the natural polyisoprenes, as early as possible after the plant material has been digested, in order to To protect polymers as effectively as possible from the influence of atmospheric oxygen and other environmental conditions outside of the plant material.
- Step (IV) of the process comprises coagulating and/or agglomerating the polymers contained in the plant sap, in particular the natural polyisoprenes.
- the coagulation or agglomeration can be effected by any coagulation or agglomeration process known in the art, in particular by one of the known coagulation or agglomeration processes for rubber. It is preferred that the coagulation/agglomeration of the polyisoprenes takes place in aqueous solution. This can also mean that the coagulation/agglomeration can already take place in the plant sap still in the plant material, for example if the plant material is stored or thermally treated, for example by boiling.
- the coagulation or agglomeration of the polymers can also take place during the treatment of the plant material for the extraction of the plant sap and/or its ingredients, for example by heating to Breaking down the plant material or heating the exiting plant sap, so that step (IV) does not require any separate addition of a substance and/or no separate additional procedure.
- Suitable methods for coagulation/agglomeration of the polymers include, but are not limited to, heating the plant material/sap, adding ions, adding organic solvents, etc.
- the polymer chains originally dissolved and/or emulsified in the plant sap change to a solid state and can be separated from the (preferably aqueous) mixture.
- the polyisoprenes are preferably coagulated by storing or heating the plant material/the plant sap, preferably up to the point of boiling in water or an aqueous solution. When heated, the polyisoprenes contained in the plant sap flocculate and the resulting natural rubber flakes can be separated from other components of the plant material and the plant sap. Any suitable separation method can be used for separating the rubber flakes, such as skimming, sieving, filtering, milling, liquid phase extraction, centrifugation, etc., without being limited to the methods mentioned.
- the natural rubber flakes obtained in this way can be washed in one or more intermediate steps according to step (V) in order to additionally clean the natural rubber obtained from other ingredients of the plant material.
- the natural rubber flakes obtained can be brought into contact with fresh water or an aqueous solution, for example transferred thereto.
- step (III) So the addition of the anti-aging agent can also take place before, during or after such a washing step, for example by adding the anti-aging agent to the water/the aqueous solution with which the natural rubber flakes are brought into contact in the washing step(s).
- the rubber flakes are preferably slurried or suspended or dispersed in the water/the aqueous solution, for example by stirring, shaking or by rotating in a rotary drum.
- step (VI) of the process the coagulated or agglomerated natural rubber particles (flakes) are obtained from the aqueous mixture/suspension or dispersion.
- the invention is not limited to a specific method of separating the solid particles from the aqueous mixture/suspension or dispersion, rather any suitable separation method can be used, such as skimming, sieving, filtering, removing the liquid phase, centrifuging, etc.
- step (V) and (VI) By separating the natural rubber particles (flakes) from the liquid phase of the aqueous mixture / suspension or dispersion according to steps (V) and (VI), these are at least partially, preferably largely, separated from other ingredients of the plant material, so that the natural rubber obtained is otherwise Ingredients of the plant material, in particular other ingredients of the plant sap, only in an amount of up to a maximum of 30% by weight, preferably of up to a maximum of 25% by weight, more preferably of up to a maximum of 20% by weight, even more preferably of up to contains a maximum of 15% by weight.
- the ingredients of the original plant juice can be depleted to different extents, for example the inulin, which occurs in large proportion in the original plant juice, is preferably essentially separated (washed out) from the natural rubber flakes, while proteins, for example, can partially co-flocculate during the heating process and can also be separated from the aqueous solution when the rubber flakes are obtained.
- the natural rubber obtained has at least a certain content of other natural ingredients originating from the plant material, such as oligomeric isoprenoids, lipids and proteins, in addition to the natural polyisoprenes.
- the natural rubber obtained from the mixture, suspension or dispersion is optionally dried by means of a suitable method for further processing.
- Suitable drying processes for natural rubber are known in the art and can include treatment with air and/or heat.
- the anti-aging agent is already in contact with the natural rubber at the latest during drying, preferably even before this step.
- the anti-aging agent(s) is/are not sufficiently distributed or incorporated in the natural rubber obtained during or after the above-mentioned process steps, this can be done during the process, in particular before, during or after step (IV), during or after (at least one of) the washing step (e) according to step (V), or after step (VI) or after drying the rubber by further incorporating the anti-aging agent(s) into the natural rubber, for example by stirring, kneading, milling, by diffusion in suspension of natural rubber and anti-aging agent in water or other suitable method.
- This "further incorporation” does not refer to the addition / contacting of the anti-aging agent, but to the even distribution and incorporation of the agent in the natural rubber compound.
- the anti-aging agent is always brought into contact with the plant sap/its ingredients before the (complete) drying of the natural rubber.
- the temperature during which the anti-aging agent is brought into contact with the natural rubber is preferably selected in a range from -25° C. to 100° C., preferably in the range from 0° C. to 90° C., particularly preferably from 10° C.
- the time should be at least 10 min, preferably at least 30 min, more preferably at least 1 hour, and can be extended arbitrarily up to a suitable period of time as needed, for example, the contacting can be between 1 hour and 7 days, preferably 2 Hours to 3 days, more preferably from 4 hours to 36 hours, even more preferably from 4 to 10 hours, in order to ensure an efficient effect of the aging inhibitor before the (complete) drying of the natural rubber.
- step (VI) all are carried out before drying the natural rubber according to step (VII).
- the steps described as optional in the claim or in the above description are also carried out at least in part, preferably all of them.
- Particular preference is given to carrying out the washing step(s) (V) of the process.
- at least a portion of the antiaging agent to be incorporated into the natural rubber is added to the fresh water used to wash the natural rubber flakes. Also the drying step
- (VII) is preferably carried out as a separate process step.
- step (VIII) The incorporation of the anti-aging agent(s) according to step (VIII) is also preferably carried out, with such incorporation being able to take place either before the natural rubber is dried, during or after its drying, or both before and during/after the natural rubber is dried .
- the incorporation of the anti-aging agent(s) into the natural rubber can therefore still be carried out in the aqueous mixture/suspension of the natural rubber flakes, after the liquid phase has been separated from the natural rubber flakes, but before the actual drying, or also during or after drying, or both , as well as.
- anti-aging agent(s) by stirring, milling, kneading, by diffusion in suspension of natural rubber and anti-aging agent in water or any other suitable method for a period of time that allows efficient incorporation into the finished (dried) natural rubber.
- the method according to the invention can be applied to all types of plants which are suitable for obtaining natural rubber.
- plants besides Hevea brasiliensis, are also members of the Asteraceae, such as Taraxacum sp. or Scorzonera sp., especially Taraxacum kok-saghyz, Taraxacum krim-saghyz, Taraxacum bicorne, Taraxacum brevicorniculatum, or Scorzonera tau-saghyz, Scorzonera Uzbekistanica, Scorzonera teke-saghyz, Scorzonera hispanica, Scorzonera tausaghyz, or Guayule (Parthenium argentatum), or other species like Apocynum venetum, Asclepias incarnata, Asclepias incarnata cornuti, Asclepias sub-lata, Asclepias syrica, Cacalia atrip
- a plant species or a mixture of plant species that thrive under the climatic conditions of Central Europe and contain natural polyisoprenes in their plant juices is particularly suitable as the plant material from which the plant sap and/or its ingredients are obtained.
- the plants or parts of plants are preferably used in the process as fresh plant material, optionally after a certain storage period, for example up to 1 year, but without separate drying of the plants or the plant material used. It is therefore preferred according to the invention that the plant material still contains at least 10%, preferably at least 25%, more preferably at least 40, 50, 60, 70, 80, 90 or even 95% of the moisture when processed according to the method described here , which it exhibited at the time of harvest.
- plant materials can also be used which—for example after storage—have a lower moisture content, e.g. a moisture content ⁇ 10%, ⁇ 5%, ⁇ 3%, ⁇ 2% or ⁇ 1%.
- the plant(s) is/are preferably selected from a Taraxacum sp. or a Scorzonera sp., in particular from Russian dandelion, such as Taraxacum kok-saghyz, Taraxacum krim-saghyz, Taraxacum bicorne, Taraxacum brevicorniculatum, or from Scorzonera tau-saghyz, Scorzonera Uzbekistanica, Scorzonera teke-saghyz, Scorzonera hispanica, Scorzonera tausaghyz or mixtures of these plants, preferably from Taraxacum kok-saghyz, Scorzonera tau-saghyz, Scorzonera Uzbekistanica, Scorzonera teke-saghyz or Mixtures or hybrids thereof, particularly preferably from Taraxacum kok-saghyz or from Scorzonera tau-saghyz.
- Russian dandelion such as Taraxacum
- the natural rubber from a dandelion species (Taraxacum species), in particular from Russian dandelion, preferably from Taraxacum kok-saghyz or Taraxacum krim-saghyz, with Taraxacum kok-saghyz being particularly preferred.
- Hybrids involving Taraxacum kok-saghyz or Taraxacum krim-saghyz are also particularly suitable. Only a part of whole plants can be used as plant material for the method according to the invention, in particular a part in which the concentration of natural polyisoprenes is particularly high, for example in the case of dandelion the roots of the plant.
- the anti-aging agent used can in principle be any known anti-aging agent.
- the anti-aging agent is preferably selected from an antioxidant, a metal ion complexing agent and/or a free-radical scavenger, it also being possible for various anti-aging agents to be used as a mixture or combination.
- the anti-aging agent is preferably selected from butyl hydroxy toluene (BHT), vitamin E in at least one stereoisomeric form or a derivative thereof, an N-Ci-i2 alkyl-N'-phenyl-p-phenylenediamine such as N-isopropyl-N '-phenyl-p-phenylenediamine, N-1,3-dimethylbutyl-N'-phenyl-p-phenylenediamine (6PPD), N-1,4-dimethylpentyl-N'-phenyl-p-phenylenediamine (7PPD) or N, N'-bis-1,4-(1,4-dimethylpentyl)-p-phenylenediamine (77PD), diaryl-p-phenylenediamine (DTPD), 4,4'-bis(Ci-i 2 alkylamino)triphenylamine, 7, 8-dimethylisoalloxazine or a compound containing 7,8-
- the anti-aging agent(s) is/are preferably selected from butyl hydroxy toluene (BHT), vitamin E in the form of a tocopherol or a tocotrienol, in particular desmethyl tocotrienols, gamma tocotrienol, delta tocotrienol or a mixture of gamma and delta tocotrienol (e.g.
- BHT butyl hydroxy toluene
- vitamin E in the form of a tocopherol or a tocotrienol, in particular desmethyl tocotrienols, gamma tocotrienol, delta tocotrienol or a mixture of gamma and delta tocotrienol (e.g.
- DMT3 from Tricutis
- the anti-aging agent(s) is/are selected from butyl hydroxy toluene (BHT), vitamin E in the form of a tocopherol or a tocotrienol, in particular desmethyl tocotrienols, gamma-tocotrienol, delta-tocotrienol or a mixture of gamma- and delta- tocotrienol (e.g. BHT), butyl hydroxy toluene (BHT), vitamin E in the form of a tocopherol or a tocotrienol, in particular desmethyl tocotrienols, gamma-tocotrienol, delta-tocotrienol or a mixture of gamma- and delta- tocotrienol (e.g.
- BHT butyl hydroxy toluene
- DMT3 from Tricutis
- BHT butyl hydroxy toluene
- a preferred mixture is BHT with a vitamin E in the form of a tocopherol or a tocotrienol and/or with the compound according to formula (I), in particular Wingstay® L from Omnova Solutions.
- the amount of anti-aging agent(s) used is calculated in such a way that the anti-aging agent(s) is/are available on contact with the polymer-containing plant sap in an amount which results in a total amount of anti-aging agent in the finished (dried) natural rubber of at least 0.01 phr , preferably in an amount of from 0.05 to 5 phr, more preferably from 0.10 to 3.5 phr, more preferably from 0.25 to 2 phr, most preferably from 0.4 to 1 phr, based on the finished, dried rubber .
- the specification phr (parts per hundred parts of rubber by weight) used here is the quantity specification for compound formulations customary in the rubber industry.
- the dosage of the parts by weight of the individual substances is always based on 100 parts by weight of the total mass of all the rubbers present in the mixture.
- the antiaging agent can be added to the plant material/plant sap/its ingredients in any suitable form. Depending on the state of aggregation of the anti-aging agent as such, it can be added to the plant material/the polymer-containing plant sap and/or its ingredients in the form of a powder, a suspension, a liquid or a solution. It is particularly preferred that - should the anti-aging agent as such be a solid - the anti-aging agent is either ground very finely before it comes into contact with the plant sap, suspended in a liquid, or dissolved in a suitable organic or aqueous solvent. If the anti-aging agent is finely ground, it is preferable for it to have a maximum particle size of 1000 ⁇ m.
- an aqueous solvent or a suitable organic solvent When the anti-aging agent is dissolved, it is preferable to use an aqueous solvent or a suitable organic solvent. If an aqueous solvent is used, water or, for example, an aqueous buffer can be used as an organic solvent, ethanol, isopropanol or process oil (vegetable or mineral based oils) is preferred. A mixture of suitable aqueous and organic solvents can also be used. If an organic solvent is used because an anti-aging agent is not soluble in water, the anti-aging agent can crystallize out again when it is added to the aqueous system used for natural rubber extraction or purification. If the anti-aging agent itself is present as a pure substance in the form of a liquid, it can also be used directly in this form or, if appropriate, diluted with another suitable liquid, for example with one of the aforementioned solvents.
- the natural rubber obtained from the plant sap and to which anti-aging agent has been added can be used to produce a rubber composition from which rubber or rubber articles can be produced.
- ingredients originating from the natural source of natural rubber can be admixed to the rubber composition in order to make the composition particularly suitable for the intended processing purpose. Therefore, at least one of the following ingredients can be added to a rubber composition according to the invention:
- the rubber compound can also contain other ingredients (other anti-aging agents, processing aids, ASM, coupling agents, reinforcing resin systems, ...)
- the natural rubber produced by the present process can be used alone or in a rubber blend for the manufacture of rubber or rubber articles.
- Preferred caoutchouc or rubber articles are those that withstand mechanical stress and are elastic at the same time.
- Such articles are preferably selected from tires, in particular vehicle tires, or tire parts, bellows, conveyor belts, air springs, belts, belts such as V-belts, toothed belts, flat belts, V-ribbed belts, hoses, shoe soles, rubber rings, medical articles and hoses.
- the rubber composition can optionally contain at least one other type of rubber in addition to the natural polyisoprene.
- This can be selected from the group consisting of natural polyisoprene and/or synthetic polyisoprene and/or epoxidized polyisoprene and/or butadiene rubber and/or butadiene-isoprene rubber and/or solution-polymerized styrene-butadiene rubber and/or emulsion-polymerized styrene Butadiene rubber and/or styrene-isoprene rubber and/or liquid rubbers with a molecular weight Mw greater than 20000 g/mol and/or halobutyl rubber and/or polynorbornene and/or isoprene-isobutylene copolymer and/or ethylene-propylene -diene rubber and/or nitrile rubber and/or chloroprene rubber and/or acrylate rubber and/
- It is preferably selected from other types of natural rubber, for example natural rubber from Hevea brasiliensis, synthetic polyisoprene and/or butadiene rubber and/or solution-polymerized styrene-butadiene rubber and/or emulsion-polymerized styrene-butadiene rubber.
- the synthetic rubbers mentioned can optionally also be replaced by suitable groups be functionalized.
- a rubber mixture of this type is particularly suitable for the production of environmentally friendly pneumatic vehicle tires with low rolling resistance, in particular their treads.
- this rubber mixture contains the natural rubber containing natural polyisoprene produced by the process according to the invention in amounts of 0.1 to 99 phr, preferably 0.5 to 90 phr, particularly preferably in amounts of from 5 to 85 phr.
- this rubber mixture either another natural rubber, for example a natural rubber from Hevea brasiliensis, or a synthetic rubber, such as preferably a butadiene rubber and/or styrene-butadiene rubber, which can optionally be hydrogenated, can be used.
- the rubber used for the rubber composition it is also possible for the rubber used for the rubber composition to contain only the natural rubber produced by the process according to the invention, ie to consist of it (up to 100 phr).
- the polymers described in the caoutchouc composition can be at least partially covalently bonded to one another via a crosslinker.
- a crosslinker forms a covalent bond with at least two polymer strands, so that these polymer strands are covalently bonded to one another via the crosslinker.
- Crosslinking agents suitable for this purpose are known in the art If conventional vulcanization is carried out, the vulcanization of the rubber composition can be carried out in the presence of sulfur and/or sulfur donors with the aid of vulcanization accelerators, with some vulcanization accelerators also being able to act as sulfur donors.
- the accelerator can be selected from the group consisting of thiazole accelerators and/or mercapto accelerators and/or sulfenamide accelerators and/or thiocarbamate accelerators and/or thiuram accelerators and/or thiophosphate accelerators and/or thiourea accelerators and/or xanthogenate accelerators and/or guanidine accelerators and/or morpholine derivatives.
- a sulfenamide accelerator selected from the group consisting of N-cyclohexyl-2-benzothiazole sulfenamide (CBS) and/or N,N-dicyclohexylbenzothiazole-2-sulfenamide (DCBS) and/or N-tert-butyl-2 - benzothiazylsulfenamide (TBBS).
- CBS N-cyclohexyl-2-benzothiazole sulfenamide
- DCBS N,N-dicyclohexylbenzothiazole-2-sulfenamide
- TBBS N-tert-butyl-2 - benzothiazylsulfenamide
- the rubber composition also preferably contains at least one filler such as silica, carbon black and optionally other known polar and/or non-polar fillers such as aluminosilicates and other silicates, chalk, kaolin, starch, magnesium oxide, zinc oxide, clay minerals such as bentonite, titanium dioxide and/or rubber gels, and fibers (such as aramid fibers, glass fibers, carbon fibers, cellulose fibers), carbon nanotubes (CNT) including discrete CNTs, so-called hollow carbon fibers (HCF) and modified CNT containing one or more functional groups such as hydroxy, carboxy and carbonyl groups) and/or graphite and/or graphene and/or so-called "carbon-silica dual-phase filier".
- the filler is at least one silica
- the rubber composition preferably contains from 1 to 300 phr, particularly preferably from 1 to 200 phr, very particularly preferably from 1 to 180 phr, of at least one silica.
- the rubber composition preferably contains from 1 to 200 phr, more preferably from 1 to 170 phr and most preferably from 1 to 100 phr of at least one carbon black.
- the silicic acids can be the silicic acids known to those skilled in the art which are suitable as fillers for tire rubber mixtures.
- a precipitated silica is preferably used. It is particularly preferred if a finely divided, precipitated silica is used which has a nitrogen surface area (BET surface area) (according to DIN ISO 9277 and DIN 66132) from 35 to 400 m 2 / g, preferably from 35 to 350 m 2 / g, more preferably from 85 to 320 m 2 / g, and a CTAB surface area (according to ASTM D 3765) from 30 to 400 m 2 / g, preferably from 60 to 330 m 2 / g, more preferably from 80 to 300 m 2 /g.
- BET surface area nitrogen surface area
- CTAB surface area accordinging to ASTM D 3765
- the rubber composition contains carbon black, all types of carbon black known to those skilled in the art are conceivable.
- a carbon black is preferably used which has an iodine adsorption number according to ASTM D 1510 from 30 to 250 g/kg, preferably 30 to 180 kg/g, and a DBP number according to ASTM D 2414 from 80 to 200 ml/100 g, preferably 100 to 200 ml/100g, more preferably 115 to 200 ml/100g.
- the rubber composition according to the invention can also contain a mixture of two or more of the fillers mentioned.
- Silane coupling agents can be used as adhesion promoters between inorganic materials, for example with glass beads, glass splinters, glass surfaces, glass fibers, or oxidic fillers, preferably silicic acids and organic polymers, for example duroplastics, thermoplastics or elastomers, or as crosslinking agents and surface modifiers for oxidic surfaces.
- silane coupling agents known to those skilled in the art for use in rubber mixtures can be used as silane coupling agents be used.
- Such coupling agents known from the prior art are bifunctional organosilanes which have at least one alkoxy, cycloalkoxy or phenoxy group as a leaving group on the silicon atom and which have a group as the other functionality which, after cleavage, can undergo a chemical reaction with the double bonds of the polymer .
- the latter group can be z.
- Carbon black coupling agents can also be used.
- zinc oxide is not one of the fillers, but it can be present in the rubber composition, preferably in combination with stearic acid.
- the rubber composition preferably contains other additives.
- additives can essentially - in addition to zinc oxide (ZnO) and stearic acid - plasticizers, vulcanization accelerators, antiozonants, other anti-aging agents, reinforcing resins including HMMM / HMT, adhesive resins, mastication aids, adhesive systems, reinforcing resins and other activators or processing aids, such as fatty acid salts, such as Zinc soaps and fatty acid esters and derivatives thereof, such as zinc stearate, or zinc complexes such as zinc ethylhexanoate.
- ZnO zinc oxide
- stearic acid - plasticizers vulcanization accelerators, antiozonants, other anti-aging agents, reinforcing resins including HMMM / HMT, adhesive resins, mastication aids, adhesive systems, reinforcing resins and other activators or processing aids, such as fatty acid salts, such as Zinc soaps and fatty acid esters and derivatives thereof, such as zinc ste
- plasticizers include aromatic, naphthenic or paraffinic mineral oil plasticizers, such as MES (mild extraction solvate) or RAE (residual aromatic extract) or TDAE (treated distillate aromatic extract), or rubber-to-liquid oils (RTL) or biomass to-liquid oils (BTL) or facts or plasticizer resins or liquid polymers (such as liquid BR).
- MES millimild extraction solvate
- RAE residual aromatic extract
- TDAE treated distillate aromatic extract
- RTL rubber-to-liquid oils
- BTL biomass to-liquid oils
- facts or plasticizer resins or liquid polymers such as liquid BR.
- the proportion of the total amount of further additives is preferably 3 to 150 phr, preferably 3 to 100 phr and particularly preferably 5 to 100 phr.
- Another object of the present invention is the use of the rubber composition described for the production an elastic material, for example for the production of caoutchouc or rubber articles, such as bellows, conveyor belts, air springs, belts, belts, e.g. V-belts, toothed belts, flat belts, V-ribbed belts, hoses, shoe soles, rubber rings, tactile sensors for medical applications or robotic applications, medical articles , hoses or in particular vehicle tires (including parts thereof).
- a further object of the invention is therefore also an elastic material, in the production of which at least one rubber composition according to the invention was used.
- Vehicle tires are understood to mean pneumatic vehicle tires and solid rubber tires, including tires for industrial and construction site vehicles, truck, passenger car and two-wheeler tires.
- the rubber composition according to the invention can also be used for the production of certain parts of such tires, for example for the production of the tread or a body mixture, including sidewall, inner liner, apex, belt, shoulder, squeegees, other inserts (e.g. runflat), belt profile, carcass, Bead reinforcement and/or bandage.
- LNR natural rubber from dandelion, here Taraxacum kok-saghyz
- the degree of protection against aging was determined via the ratio of the number-average molecular weight Mn fresh/Mn 14 days at 70°C:
- LNR without aging protection 2.55: decrease in molecular weight
- aging LNR with BHT 2.0: average aging
- NR 1.03: virtually no decrease in the molecular weight, hardly any aging of the material
- LNR natural rubber from dandelion, here Taraxacum kok-saghyz
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EP21782649.4A Pending EP4217209A1 (de) | 2020-09-23 | 2021-09-14 | Verfahren zur gewinnung von naturkautschuk, kautschukzusammensetzung mit naturkautschuk und deren verwendung |
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US (1) | US20230391894A1 (de) |
EP (1) | EP4217209A1 (de) |
JP (1) | JP2023541701A (de) |
CN (1) | CN116194307A (de) |
CA (1) | CA3192395A1 (de) |
CL (1) | CL2023000843A1 (de) |
DE (1) | DE102020211872A1 (de) |
WO (1) | WO2022063623A1 (de) |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
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US4559378A (en) * | 1984-08-30 | 1985-12-17 | The Firestone Tire & Rubber Company | Stabilization of elastomers with aliphatic-phenyl diamines and aliphatic phosphite compounds |
US4568711A (en) | 1984-12-07 | 1986-02-04 | The Firestone Tire & Rubber Company | Synergistic additive combination for guayule rubber stabilization |
DE19818564A1 (de) | 1998-04-25 | 1999-11-11 | Continental Ag | Kautschukmischung |
US7540438B2 (en) | 2006-05-23 | 2009-06-02 | Buranov Anvar U | Process for recovering rubber from rubber-bearing plants with a gristmill |
FR2908416B1 (fr) | 2006-11-09 | 2009-01-16 | Michelin Soc Tech | Composition de caoutchouc pour pneumatique incorporant un nouveau systeme anti-oxydant |
FR2931158B1 (fr) | 2008-05-15 | 2010-07-30 | Michelin Soc Tech | Composition de caoutchouc pour pneumatique incorporant un nouveau systeme anti-oxydant |
US8182626B2 (en) | 2008-10-30 | 2012-05-22 | Continental Ag | Tire composition with improved vulcanizing agent |
US9346924B2 (en) | 2010-05-06 | 2016-05-24 | Kultevat, Llc | Dandelion processes, compositions and products |
ES2638943T3 (es) * | 2012-05-16 | 2017-10-24 | Bridgestone Corporation | Composiciones que contienen caucho no procedente de hevea purificado y métodos de purificación relacionados |
DE102013107279A1 (de) | 2013-07-10 | 2015-01-15 | Continental Reifen Deutschland Gmbh | Verfahren zur Trennung von Naturkautschuk-Material aus Wurzelmaterial von Löwenzahn |
JP6440520B2 (ja) | 2015-02-17 | 2018-12-19 | 住友ゴム工業株式会社 | ラテックスの採取方法、キク科に属する植物の栽培方法、空気入りタイヤの製造方法及びゴム製品の製造方法 |
EA201891090A1 (ru) | 2015-11-03 | 2018-10-31 | Киджин Н.В. | Способ экстракции каучука |
ITUB20159548A1 (it) | 2015-12-15 | 2017-06-15 | Bridgestone Corp | Agenti anti-invecchiamento per prodotti polimerici |
CA3033656A1 (en) | 2016-08-26 | 2018-03-01 | Gea Mechanical Equipment Gmbh | Method for processing dandelion plant components |
CA3037972C (en) | 2016-09-30 | 2022-06-07 | Wm. Wrigley Jr. Company | Gum bases incorporating polymers derived from russian dandelion |
TW201930437A (zh) | 2017-09-20 | 2019-08-01 | 德商艾朗希歐德意志有限公司 | 具有高導熱性之可硫化hnbr組成物 |
EP3524639B1 (de) | 2018-02-07 | 2020-10-07 | Continental Reifen Deutschland GmbH | Fahrzeugreifen |
CN110157059A (zh) * | 2019-06-12 | 2019-08-23 | 益凯新材料有限公司 | 一种丁苯橡胶的混炼生产工艺 |
-
2020
- 2020-09-23 DE DE102020211872.8A patent/DE102020211872A1/de active Pending
-
2021
- 2021-09-14 WO PCT/EP2021/075151 patent/WO2022063623A1/de unknown
- 2021-09-14 CA CA3192395A patent/CA3192395A1/en active Pending
- 2021-09-14 US US18/246,388 patent/US20230391894A1/en active Pending
- 2021-09-14 CN CN202180064776.8A patent/CN116194307A/zh active Pending
- 2021-09-14 EP EP21782649.4A patent/EP4217209A1/de active Pending
- 2021-09-14 JP JP2023518207A patent/JP2023541701A/ja active Pending
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2023
- 2023-03-23 CL CL2023000843A patent/CL2023000843A1/es unknown
Also Published As
Publication number | Publication date |
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WO2022063623A1 (de) | 2022-03-31 |
US20230391894A1 (en) | 2023-12-07 |
CL2023000843A1 (es) | 2023-10-13 |
DE102020211872A1 (de) | 2022-03-24 |
JP2023541701A (ja) | 2023-10-03 |
CA3192395A1 (en) | 2022-03-31 |
CN116194307A (zh) | 2023-05-30 |
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