KR100840104B1 - EPDM rubber-organic clay nanocomposite manufacturing method and weather strip for automobile using nanocomposite produced thereby - Google Patents

Abstract

The present invention relates to a method for producing EPDM rubber-organic clay nanocomposites and a weather strip for automobiles using nanocomposites prepared by the present invention, in order to disperse organic clay at nanoscale in EPDM rubber (Paraffinic Oil) 1 to 50 parts by weight and 1 to 10 parts by weight of organic clay in a batch mixer or stirrer and stirred at a temperature in the range of 10 ℃ to 80 ℃ to the organic clay / paraffinic oil mixture in which the organic clay is inserted or peeled off by a solution method Obtaining; And 1 to 50 parts by weight of the mixture and 1 to 100 parts by weight of EPDM rubber in a batch mixer or an extruder to melt kneading at a glass transition temperature or higher to prepare a nanocomposite; EPDM rubber-organic clay The present invention relates to a nanocomposite manufacturing method and a weather strip for automobile using the nanocomposite produced thereby.

According to the present invention, EPDM rubber-organic clay nanocomposites forming a nanoscale dispersed form prepared by melting and mixing a solvent (paraffinic oil), which is a disadvantage of the solution method, by melting and mixing them in EPDM rubber, have a tensile strength and phosphorus. As well as the effect of excellent mechanical properties such as thermal strength, elongation, etc., when applied to automotive weather strips, the surface improvement is improved and the weight is excellent.

Description

Method of manufacturing Ethylene Propylene Diene Monomer rubber-organic clay nanocomplex and weather strip for automobile using nanocomplex manufactured by the same}

1 is a photograph showing an extruded cross-section of a weather strip for automobiles including EPDM rubber manufactured using a general method.

Figure 2 is a photograph showing the extrusion cross-section of the weather strip for automobiles containing EPDM rubber-organic clay nanocomposites prepared by melt mixing method using organic clay unlike the present invention.

Figure 3 is a photograph showing an extruded cross-section of the weather strip for automobiles including EPDM rubber-organic clay nanocomposites prepared using the nanocomposite manufacturing method according to the present invention.

Figure 4 is a photograph showing an extruded cross-section of the weather strip for automobiles including EPDM rubber-organic clay nanocomposites prepared by varying the stirring time of the organic clay in the paraffin-based oil in the method of manufacturing nanocomposites according to the present invention.

5 is a graph showing an X-ray diffraction pattern (X-ray pattern) showing the distance between the plates of Cloisite 15A.

FIG. 6 is an X-ray diffraction pattern showing the plate-to-plate distance of organic clay in EPDM rubber-organic clay nanocomposites prepared in a method of preparing nanocomposites according to the present invention with stirring time of organic clay in paraffinic oil as 1 hour. Graph representing.

FIG. 7 is an X-ray diffraction pattern showing the plate-to-plate distance of organic clay in EPDM rubber-organic clay nanocomposites prepared in a method of preparing nanocomposites according to the present invention with stirring time of organic clay in paraffinic oil as 7 hours. Graph representing.

Figure 8 is a schematic diagram showing a mechanism for peeling or inserting the organic clay using a solvent (paraffin oil) in the nanocomposite manufacturing method according to the present invention.

The present invention relates to a method for preparing EPDM rubber-organic clay nanocomposites and a weather strip for automobiles using nanocomposites prepared by the present invention. More specifically, the organicized clay compounds are inserted and stirred by a solution method in paraffin oil. Completely peeling, melt-mixing it in EPDM rubber without removing the solvent (paraffinic oil), which is a disadvantage of the solution method, to produce EPDM rubber-organic clay nanocomposites that are dispersed in nanoscale, and used for automobiles. The present invention relates to an EPDM rubber-organic clay nanocomposite manufacturing method for improving the surface improvement and weight reduction of the weather strip when applied to the weather strip, and a weather strip for automobiles using the nanocomposite produced thereby.

Conventional organic clay dispersion polymer nanocomposite manufacturing technology is to mechanically separate the plate-like clay mineral in a polymer having an aspect ratio of 100 or more by peeling the layered clay mineral to each layer in nanometer size The physical properties of general purpose polymers having poor physical properties could be improved.

Such polymer-clay nanocomposites are prepared by mixing an organic clay compound with a monomer and then polymerizing it, a solution mixing method of dissolving the polymer in a solvent and mixing it with an organic clay compound, and melting the polymer under high shear. There is a melt mixing method for mixing with clay compounds. However, the solution mixing method has a disadvantage in that the polymer is dissolved in a solvent to remove the solvent again after mixing with the organic clay compound.

In addition, in 1987, Toyota researchers in Japan inserted a nylon monomer caprolactam between the galleries of the plate-like structure and polymerized it to increase the interlayer distance, thus using about 5% by weight of the conventional filler. Even though it is reported that equivalent properties can be expressed (Journal of polymer science.Vol. 32, 625-630 (1994)).

In other words, while the filler of the conventional composite is present in the matrix of particle size usually in micron units, the nanocomposite is used by peeling the particles of the filler into each layer in nanometer units so that even if a small amount of filler is used, the particles are in each layer. The surface area improvement effect was obtained by peeling and disperse | distributing to the.

In this case, in order to easily penetrate the polymer material used in the layered structure of the clay mineral, an organic clay obtained by organically treating the clay mineral is generally used. In addition, nanocomposites using such clay minerals having an interlayer structure used as a filler may have different forms of exfoliated nanocomposites and intercalated nanocomposites.

At this time, the peelable nanocomposite is to completely disperse the plate-like peeled nano-size in the polymer matrix, the insert-type nanocomposite is the polymer is inserted between the stripped off the nano-sized plate.

In addition, a method for manufacturing a nanocomposite composed of polypropylene and organic clay was reported by Toyota Corporation in Japan (M.Kawasumi et al., Macromolecules, Vol 30, P6333, 1997).

In addition, there are patent applications and registrations for olefin-based rubber-organic clay nanocomposites and their manufacturing methods in Korea. However, as described above, the conventional technologies are insignificant when the economic effects such as surface improvement and light weight are compared with the cost of nano-ization. In addition, it is difficult to use in actual industrial sites because of the need for a separate solvent removal process.

Accordingly, the present invention is to improve the conventional problems as described above, the object is that the organic clay compound is stirred in a paraffin-based oil by a solution method to achieve insertion and complete peeling, IMPDM without removing the solvent Epitem rubber-organic clay nanocomposites are manufactured by melt-mixing in rubber to form nanoscale dispersions, and when applied to automotive weather strips, the EPD rubber which improves the surface improvement of the weather strip and has excellent weight reduction- The present invention provides a method for preparing an organic clay nanocomposite and a weather strip for automobile using the same.

In order to achieve the above object, the present invention, 1 to 50 parts by weight of paraffinic oil and 1 to 10 parts by weight of organic clay in order to disperse the organic clay nanoscale rubber in EPDM rubber batch mixer or stirrer And stirring at a temperature in the range of 10 ° C. to 80 ° C. to obtain an organic clay / paraffinic oil mixture in which organic clay was inserted or peeled off by a solution method; And mixing 1 to 50 parts by weight of the mixture and 1 to 100 parts by weight of EPDM rubber into a batch mixer or an extruder to melt kneading at a glass transition temperature or higher to prepare a nanocomposite.

On the other hand, as a technical configuration according to the present invention, the organic clay is a layered montmorillonite (montmorillonite) of the organic structure substituted with alkylammonium ions, a layered montmorillonite of the organic structure substituted with alkyl phosphonium ions, a layered organic substituted with alkylammonium ions Hectorite of structure, layered hectorite organically substituted with alkylphosphonium ions, layered saponite of organic structure substituted with alkylammonium ions and layered sandpaper organically substituted with alkylphosphonium ions It is characterized in that at least one selected from the group consisting of knight.

In addition, as a technical configuration according to the invention is characterized in that the organic clay in the EPDM rubber to form an insertion structure or a peeling structure.

In addition, the present invention is characterized in that a weather strip for automobiles is manufactured by using EPDM rubber-organic clay nanocomposites prepared by the above-described manufacturing method.

Referring to the function and operation of the present invention, as described above.

Ethylene Propylene Diene Monomer (EPDM) rubber-organic clay nanocomposite manufacturing method according to the present invention 1 to 50 parts by weight of paraffinic oil (Paparaffinic Oil) in order to disperse organic clay in nanoscale rubber 1 to 10 parts by weight of organic clay is placed in a batch mixer or agitator and stirred at a temperature ranging from 10 ° C. to 80 ° C. to obtain an organic clay / paraffinic oil mixture in which organic clay is inserted or peeled off by a solution method; And 1 to 50 parts by weight of the mixture and 1 to 100 parts by weight of EPDM rubber into a batch mixer or an extruder to melt kneading at a glass transition temperature or higher to prepare a nanocomposite.

The temperature during the melt kneading is preferably 120 ℃ to 200 ℃, the speed is preferably 70 to 90rpm, if less than or exceeds the above range when applied to automotive weather strip, such as surface improvement of the weather strip, weight reduction There is a problem of falling physical properties.

In addition, the EPDM rubber-organic clay nanocomposite 1 to 100 parts by weight EPDM rubber; 1 to 50 parts by weight of paraffinic oil; 1 to 10 parts by weight of organic clay; And 20 to 120 parts by weight of a filler.

The EPDM rubber-organic clay nanocomposite is 1-3 parts by weight of stearic acid; Zinc oxide 3 to 7 parts by weight; And 2 to 7 parts by weight of a crosslinking agent and a crosslinking agent.

EPDM rubber-organic clay nanocomposite manufacturing method of the present invention will be described in detail as follows.

First, 1 to 50 parts by weight of paraffinic oil and 1 to 10 parts by weight of organic clay are sufficiently stirred at a temperature ranging from 10 ° C. to 80 ° C. using a batch mixer or stirrer capable of temperature control, and the organic solvent is dissolved by a solution method. An organic clay / paraffinic oil mixture in which clay is inserted or exfoliated is obtained (first mixing step).

Then, the mixture obtained in the first mixing step using a batch mixer such as temperature control (banbury) such as Banbury (banbury) while maintaining a speed of 70 to 90rpm at a temperature of 120 ℃ to 200 ℃ 1 to DM rubber 1 to Mix for 30 seconds to 2 minutes with 100 parts by weight (second mixing step).

1 to 3 parts by weight of stearic acid and 3 to 7 parts by weight of zinc oxide are added to the mixture obtained in the second mixing step, followed by further mixing for 2 to 6 minutes (third mixing step).

Next, the mixture obtained in the first mixing step is added to the mixture obtained in the third mixing step and further mixed for 2 to 4 minutes) (fourth mixing step).

Then, 2-7 parts by weight of the crosslinking agent and the crosslinking activator are added to the mixture obtained in the fourth mixing step, further mixed for 3-7 minutes (the fifth mixing step), and melt kneading to prepare an EPDM rubber-organic clay nanocomposite. .

EPDM rubber used in the present invention is a ternary copolymer composed mainly of ethylene and propylene as a matrix and is a diene copolymer having an unsaturated bond. It is preferable to use ethylidene-norbonene, dicyclopentadiene, 1,4-hexadiene, and more preferably ethylidene having a high crosslinking rate. It is good to use norbornene.

The amount of the EPDM rubber is preferably used in an amount of 1 to 100 parts by weight, and when it is less than or exceeds the above range, there is a problem in that physical properties such as surface improvement and weight reduction of the weather strip when applied to an automotive weather strip.

The organic clay used in the present invention has a layered structure, and a silicate mineral having a sandwich-type structure in which an octahedral layer composed of silicon (Si) and oxygen is arranged side by side between two tetrahedral layers, and the mineral is montmorillonite ( montmorillonite, hectorite and saponite. In order to increase the affinity between the polymer and the clay, it is substituted with organic agents such as alkylammonium and alkylphosphonium in the layer. In addition, the organic clay is formed in an insert structure or a peeling structure in EP DM rubber.

For example, the organic clay may be a layered montmorillonite (montmorillonite) organically substituted with alkylammonium ions, a layered montmorillonite organically substituted with alkyl phosphonium ions, or a layered hectorite organically substituted with alkylammonium ions. ), Layered hectorite organically substituted with alkylphosphonium ions, layered saponite organically substituted with alkylammonium ions, and layered saponite organically substituted with alkylphosphonium ions. Southern Clay Products Company's Closite 20A, a topical quaternary ammonium salt, is on sale.

The amount of the organic clay may be preferably used in an amount of 1 to 10 parts by weight, and when applied to a weather strip for automobiles, there is a problem in that physical properties such as surface improvement and light weight of the weather strip are inferior.

The solvent used in the present invention is used for the insertion or peeling of the organic clay, preferably paraffinic oil is used. The solvent is preferably used in 1 to 80 parts by weight, more preferably 1 to 50 parts by weight is used. If the amount exceeds 80 parts by weight, there may be a problem such as contamination of the surface of the workpiece due to too much oil.

The filler used in the present invention is a substance added for the purpose of anti-aging, reinforcement and increase in the practical use of rubber or plastic. For example, fillers include carbon black, which is added to obtain the strength required to make automobile tires from rubber.

The filler may be carbon black, hard coal, clay, talc, silica, mistron vapor, etc., the amount is preferably used in 20 to 120 parts by weight. If the amount is less than 20 parts by weight it is not possible to obtain the required strength and expensive components are used too much economical problem, if it exceeds 120 parts by weight may not be molded into a suitable shape.

Stearic acid used in the present invention forms a complex compound or a metal salt with a metal oxide (zinc oxide) to increase compatibility with rubber and to facilitate activation of the vulcanization accelerator in the crosslinking activator. The stearic acid is preferably used in an amount of 1 to 3 parts by weight, and if less than 1 part by weight, the amount of formation of metal complexes may be small, which may lower the activation of the vulcanization accelerator in the crosslinking agent. Formation of the cross-linking activator of the vulcanization accelerator is increased and the workability is increased by lowering the viscosity, but there may be a problem that the physical properties such as tensile strength, aging properties, compressive permanent shrinkage decreases.

The zinc oxide used in the present invention forms a complex compound with stearic acid present in the blend to increase the activity of the vulcanization accelerator in the crosslinking activator. The zinc oxide is preferably used in 3 to 7 parts by weight, if less than 3 parts by weight of the metal complex is less formed, there may be a problem of lowering the activation of the vulcanization accelerator in the crosslinking activator, if it exceeds 7 parts by weight of the metal salt Formation of excess amount increases the activation of the vulcanization accelerator in the crosslinking activator and increases the workability by lowering the viscosity, but there may be a problem in that physical properties such as tensile strength, sinterability, compressive permanent shrinkage decrease.

The crosslinking agent and the crosslinking activator used in the present invention crosslink the IMPDM rubber to cause crosslinking between the main chains to enhance physical properties such as higher mechanical properties, and a mixture of sulfur and vulcanization accelerators and phenolic resins. And mixtures of halogen donors, mixtures of peroxides and peroxide active aids, and the like. For example, sulfur and the vulcanization accelerator is preferably used 1.2 to 2.0 parts by weight of sulfur and 0.5 to 4.5 parts by weight of vulcanization accelerator, if the outside of the lower limit of the range there may be a problem that the crosslinking does not occur sufficiently, out of the upper limit In case of excessive crosslinking, it becomes too hard, and there may be a problem of adversely affecting physical properties due to the remaining of the unreacted crosslinking activator.

EPDM rubber-organic clay nanocomposites prepared according to the present invention may further include 1 to 10 parts by weight of the antifoaming agent to increase the extrusion and injection performance. In addition, 0.5 to 2 parts by weight of an anti-aging agent may be further included to reduce the change over time.

In addition, in the manufacturing process of EPDM rubber-organic clay nanocomposites according to the present invention, in addition to the above components, an activator, a retarder, an accelerator, and the like, which are commonly used according to the use, may be further used. It will be apparent to those skilled in the art that the resin, plasticizer, pigment, fatty acid, wax, antioxidant, ozone inhibitor, and the like may further be included.

As the melt kneading apparatus according to the present invention, a banbury mixer, a single screw extruder, a twin screw extruder, or the like may be used. It is preferable to use a continuous kneading apparatus.

The present invention also manufactures a weather strip for automobiles using EPDM rubber-organic clay nanocomposites prepared by the above production method.

Hereinafter, the present invention will be described in detail through Examples, Comparative Examples, and Experimental Examples. However, the following examples and the like are intended to better understand the contents of the present invention, and the present invention is not limited thereto.

Example 1

100 parts by weight of EPDM rubber was mixed for 1 minute and 15 seconds while maintaining a speed of 80 rpm at 160 ° C. using a batch mixer such as a temperature-controlled banbari, and 1 part by weight of stearic acid and 5 parts by weight of zinc oxide. Part was added and further mixed for 4 minutes. 5 parts by weight of Cloisite 15A in 40 parts by weight of paraffinic oil was added to the mixture in a stirrer, and then separated or inserted organic clay / paraffin system obtained by stirring at a temperature of 50 ° C. for 1 hour. The oil mixture was added and mixed for 3 minutes, and 3 parts by weight of the processing aid, 1.5 parts by weight of sulfur and 1.5 parts by weight of vulcanization accelerator were added to the mixture, mixed for 5 minutes, and melt-kneaded to make an EPDM rubber-organic clay nanocomposite. Was prepared.

Example 2

20 parts by weight of carbon black was mixed with melt and kneaded in the same manner as in [Example 1], except that 20 parts by weight of stearic acid and zinc oxide were added together to prepare an EPDM rubber-organic clay nanocomposite.

Example 3

Except for applying 40 parts by weight instead of 20 parts by weight of carbon black was mixed and melt kneaded in the same manner as in [Example 2] to prepare an EPDM rubber-organic clay nanocomposite.

Example 4

5 parts by weight of organic clay is added to 40 parts by weight of paraffinic oil in a stirrer and the same as in [Example 3], except that stirring is performed for 7 hours instead of stirring for 1 hour at a temperature of 50 ° C. By mixing and melt kneading to prepare an EPDM rubber-organic clay nanocomposite.

Comparative Example 1

100 parts by weight of EPDM rubber was mixed for 1 minute and 15 seconds while maintaining a speed of 80 rpm at 160 ° C. using a batch mixer such as a temperature control vanvarii, and 5 parts by weight of Closite 15A to the mixture obtained above. 1 part by weight of stearic acid and 5 parts by weight of zinc oxide were added, and the mixture was further mixed for 4 minutes. 40 parts by weight of paraffinic oil was added to the mixture obtained above, followed by further mixing for 3 minutes, and 3 parts by weight of processing aid, 1.5 parts by weight of sulfur and 1.5 parts by weight of vulcanization accelerator were added thereto for 5 minutes. Mixing and melt kneading produced EPDM rubber-organic clay nanocomposites.

Comparative Example 2

Except for 5 parts by weight of Cloisite (Cloisite) was mixed in the same manner as in [Comparative Example 1] and melt kneaded to prepare an IPDM rubber-filler composite.

Comparative Example 3

Except for 5 parts by weight of Closite (Cloisite) except that 40 parts by weight of carbon black instead of 40 parts by weight of carbon black was mixed in the same manner as in [Comparative Example 1] and melt-kneaded to prepare an EPDM rubber-filler composite It was.

Experimental Example 1

After recovering the EPDM rubber-organic clay nanocomposites prepared in [Example 1] to [Example 4] and [Comparative Example 1] to [Comparative Example 3] and compression molding at 160 ℃ to prepare a test piece and then KSM Physical properties were tested and evaluated by 6518 Vulcanized Rubber Physical Test Method.

The physical property measurement results of the above [Example 1] to [Example 2] and [Comparative Example 1] to [Comparative Example 2] are summarized in Table 1 below.

TABLE 1

Properties Example Comparative example One 2 3 4 One 2 3 importance 0.9104 0.9846 1.0422 1.0422 1.0422 1.3028 1.5146 Tensile Strength (kgf / ㎠) 91 220 284 304 204 170 272 100% modulus 17 30 37 39 27 23 32 Tear strength (kgf / ㎠) 12 36 38 41 34 36 39 Elongation (%) 610 770 827 830 760 580 541

As can be seen from the above [Table 1], according to the present invention, the organic clay is prepared by stirring or peeling or inserting into a solvent (paraffinic oil) by the solution method of [Example 1] to [Example 3]. EPDM rubber-organic clay nanocomposite was found to increase the tensile strength, tear strength, elongation as the carbon black content increases. This indicates that the organic clay has an interaction at the interface due to the increase in the contact area between EPDM rubber. In addition, the increased compatibility between the organic clay and carbon black indicates that it can be used as a mixture of organic clay and carbon black.

In addition, the EP clay rubber-organic clay nanocomposites of [Examples 3] to [Example 4] prepared according to the present invention by stirring and peeling or inserting the organic clay into a solvent (paraffinic oil) by the solution method are organic clay. It was confirmed that the tensile strength, tear strength, and elongation were increased at the same weight part by increasing the stirring time when stirring the solvent (paraffinic oil) by the solution method. This indicates that when the EPDM rubber-organic clay nanocomposite is completely peeled off rather than inserted, the interface between the organic clay and the EPDM rubber is increased. In other words, in the case of the tear strength, the organic clay finely dispersed in the EPDM rubber plays a physical obstacle role that can effectively prevent crack growth. Therefore, as the organic clay is completely peeled away from the insertion, the contact area is increased to increase the contact area. Because you can. Accordingly, the insertion and complete peeling of [Example 3] to [Example 4] can be confirmed by an X-ray diffraction pattern (X-ray pattern), which is illustrated in FIGS. 6 to 7.

Comparing [Comparative Example 1] and [Examples 3] to [Example 4] by the same method, it can be seen that it has excellent physical properties compared to EPDM rubber-organic clay nanocomposites prepared by melt kneading.

In addition, according to the present invention, the organic clay-paraffinic oil mixture and filler prepared by stirring or peeling the organic clay into a solvent (paraffinic oil) by a solution method in order to use it for the weather strip of automobiles have a glass transition temperature or more. EMPDIUM rubber-organic clay nanocomposites of [Example 2] to [Example 4] prepared by melt kneading by melt insertion method in [Comparative Example 2] to [Comparatively prepared without using conventional organic clay Compared to the EPDM rubber-filler composite of Example 3, it was found that the specific gravity is reduced by using the organic clay, so that the weight reduction of the automotive weather strip is excellent.

Experimental Example 2

The EPDM rubber-organic clay nanocomposites and EPDM rubber-filler composites prepared in the above [Examples 3] to [Example 4] and [Comparative Examples 1] to [Comparative Example 2] were used with a Braband single screw extruder. To produce an automotive weather strip as an extrudate, and the surface is analyzed and the extrusion surface state is compared and shown in FIGS. 1 to 4.

1 is a photograph showing the extrusion cross-section of the weather strip for automobiles including EPDM rubber prepared using a general method, Figure 2 is EPDM rubber prepared by melt mixing method using an organic clay- It is a photograph which shows the extrusion cross section of the weather strip for automobile containing an organic clay nanocomposite.

Figure 3 is a photograph showing an extruded cross-section of the weather strip for automobiles including EPDM rubber-organic clay nanocomposites prepared using the nanocomposite manufacturing method according to the present invention, Figure 4 is a nanocomposite manufacturing method according to the present invention Is a photograph showing an extruded cross section of a weather strip for automobiles comprising EPDM rubber-organic clay nanocomposites prepared by varying the stirring time of organic clay in paraffinic oil.

As can be seen in Figures 1 to 4 below, by varying the stirring time of the organic clay in the paraffinic oil according to the present invention by inserting or peeling by a solution method at a glass transition temperature or more in the EPDM rubber without removing the solvent EPDM rubber-organic clay nanocomposites prepared by melt kneading are EPDM rubber-organic clay nanocomposites of [Comparative Example 1] prepared by a conventional melt mixing method and EPDM rubber-fillers prepared using a general method. It can be seen that the surface improvement effect is superior to the composite.

5 is a graph showing an X-ray diffraction pattern (X-ray pattern) showing the distance between the plates of the organic clay (Cloisite 15A).

6 to 7 are X-ray diffraction patterns showing the plate-to-plate distance of organic clay in EPDM rubber-organic clay nanocomposites prepared by varying the stirring time of organic clay in paraffin oil in the method of manufacturing nanocomposites according to the present invention. It is a graph showing an X-ray pattern.

As can be seen in Figure 6 to Figure 7, according to the present invention was able to prove the name of the complete peeling rather than insertion as the stirring time of the organic clay in the paraffinic oil increased, and thus tensile strength, tear strength, It can be seen that mechanical properties such as elongation are excellent.

As described in detail above, IMPDM rubber-organic clay forming a dispersed form in nanoscale prepared by melt mixing in EPDM rubber without removing a solvent (paraffinic oil) which is a disadvantage of the solution method according to the present invention. Nanocomposites have the effect of excellent mechanical properties such as tensile strength, tear strength, elongation rate, as well as improved surface improvement and light weight when applied to automotive weather strips.

While the invention has been shown and described with respect to particular embodiments, it will be appreciated that the invention can be varied and modified without departing from the spirit or scope of the invention as set forth in the claims below. It will be appreciated that those skilled in the art can easily know.

Claims (4)

1 to 50 parts by weight of paraffinic oil and 1 to 10 parts by weight of organic clay are placed in a batch mixer or stirrer and stirred at a temperature ranging from 10 ° C. to 80 ° C. in order to disperse the organoclay in nanoscale rubber. Obtaining an organic clay / paraffinic oil mixture in which the organic clay is completely peeled off by a solution method; And 1 to 50 parts by weight of the mixture and 1 to 100 parts by weight of EPDM rubber into a batch mixer or an extruder and melt kneading at a glass transition temperature or higher to prepare a nanocomposite; EPDM rubber-organic clay nano Composite manufacturing method. The method of claim 1, The organic clay is a layered montmorillonite (montmorillonite) of the organic structure substituted with alkylammonium ions, a layered montmorillonite of the organic structure substituted with alkyl phosphonium ions, hectorite of the layer structure organic substituted with alkylammonium ions, alkyl force At least one selected from the group consisting of layered hectorite organically substituted with phosphium ions, layered saponite organically substituted with alkylammonium ions, and layered saponite organically substituted with alkylphosphonium ions EPDM rubber-organic clay nanocomposite manufacturing method characterized in that. The method of claim 1, IMPDM rubber-organic clay nanocomposite manufacturing method characterized in that the organic clay in the EPDM rubber to form a complete peeling structure. A weather strip for automobiles, which is prepared using EPDM rubber-organic clay nanocomposites prepared by the method according to claim 1.

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