CN111205586A - Low-odor SEBS (styrene-ethylene-butadiene-styrene) elastomer material for vehicles and preparation method thereof - Google Patents
Low-odor SEBS (styrene-ethylene-butadiene-styrene) elastomer material for vehicles and preparation method thereof Download PDFInfo
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- 229920001935 styrene-ethylene-butadiene-styrene Polymers 0.000 title claims abstract description 68
- 239000000463 material Substances 0.000 title claims abstract description 37
- 229920001971 elastomer Polymers 0.000 title claims abstract description 31
- 239000000806 elastomer Substances 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 61
- 239000004594 Masterbatch (MB) Substances 0.000 claims abstract description 40
- 239000003463 adsorbent Substances 0.000 claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000005662 Paraffin oil Substances 0.000 claims abstract description 10
- 239000000654 additive Substances 0.000 claims abstract description 10
- 230000000996 additive effect Effects 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 239000004698 Polyethylene Substances 0.000 claims description 27
- -1 polyethylene Polymers 0.000 claims description 27
- 229920000573 polyethylene Polymers 0.000 claims description 27
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 12
- 239000005909 Kieselgur Substances 0.000 claims description 10
- 238000010306 acid treatment Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 238000001125 extrusion Methods 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 235000012239 silicon dioxide Nutrition 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical class C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000005187 foaming Methods 0.000 claims description 3
- 239000004088 foaming agent Substances 0.000 claims description 3
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 claims description 2
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical group CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 claims description 2
- 239000000155 melt Substances 0.000 claims description 2
- 239000013536 elastomeric material Substances 0.000 claims 1
- 239000000126 substance Substances 0.000 abstract description 12
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 10
- 239000000243 solution Substances 0.000 description 6
- 238000001179 sorption measurement Methods 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 230000002195 synergetic effect Effects 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000011256 inorganic filler Substances 0.000 description 2
- 229910003475 inorganic filler Inorganic materials 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L53/02—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes
- C08L53/025—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes modified
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/04—Thermoplastic elastomer
Abstract
The invention discloses a low-odor SEBS (styrene-ethylene-butadiene-styrene) elastomer material for vehicles and a preparation method thereof, wherein the SEBS elastomer material comprises the following components in percentage by weight: 60-81 wt% of SEBS, 15-25 wt% of paraffin oil, 1-5 wt% of main odor adsorbent and 3-10 wt% of auxiliary odor adsorbent; also comprises 0-10 wt% of additive. The preparation process comprises the steps of firstly melting and blending the odor auxiliary adsorbent kieselguhr and SEBS and other components to form a uniformly dispersed phase structure, then adding the odor main adsorbent water-containing master batch, and then taking away small molecular substances causing odor generation in the SEBS by water in the master batch, wherein the contact area is greatly enlarged due to the microporous structure of the kieselguhr, so that the small molecular substances are promoted to be removed more quickly and effectively, and the odor of the low-odor vehicular SEBS elastomer material can be reduced to the minimum level of 3.0 by adjusting the dosage proportion of the components.
Description
Technical Field
The invention relates to the technical field of automotive elastomer materials, in particular to a low-odor automotive SEBS elastomer material and a preparation method thereof.
Background
The SEBS elastomer material is a polymer material with wide application in automobile materials, the mechanical property can easily meet the requirements of various automobile host factories, but the smell is often difficult to achieve. Taking the odor standard PV3900 of popular automobile materials as an example, general SEBS elastomer materials are mainly copolymers of styrene materials, benzene and catalyst substances are easy to remain during polymerization, and some auxiliary agents are added during modification due to performance requirements and are main sources of odor, so that the odor grade is often over 4 grade and even reaches 5 grade.
In view of the above, there is a need to develop a low-odor SEBS elastomer material for vehicles and a preparation method thereof, which can solve the odor problem of the SEBS elastomer material.
Disclosure of Invention
The invention aims to provide a low-odor SEBS elastomer material for vehicles and a preparation method thereof, aiming at the defects of the prior art, the odor auxiliary adsorbent diatomite and the SEBS and other components are melted and blended to form a uniformly dispersed phase structure, and then the water-containing master batch of the odor main adsorbent is added, so that the micromolecule substances in the SEBS, which cause odor generation, are taken away by the water in the master batch, the contact area is greatly enlarged due to the microporous structure of the diatomite, the micromolecule substances are promoted to be removed more quickly and effectively, and the odor of the low-odor SEBS elastomer material for vehicles can be reduced to the minimum level, which can reach 3.5, by adjusting the dosage proportion of the components.
The technical scheme adopted by the invention to achieve the aim is as follows:
a low-odor SEBS elastomer material for vehicles comprises the following components in percentage by weight: 60-81 wt% of SEBS, 15-25 wt% of paraffin oil, 1-5 wt% of main odor adsorbent and 3-10 wt% of auxiliary odor adsorbent.
Furthermore, the SEBS is hydrogenated styrene butadiene block copolymer with the weight-average molecular weight of 180000-210000, and the trademark is SEBS G1651 of Keteng corporation.
Furthermore, the main odor adsorbent is water-containing master batch, foamed polyethylene is used as a master batch carrier of the water-containing master batch, and the water content accounts for 60-80 wt% of the water-containing master batch.
Further, the aqueous master batch is prepared by adopting the following method, and comprises the following steps:
s1, extruding the polyethylene into strip polyethylene in an extruder, and chopping the polyethylene into polyethylene pre-expanded particles;
s2, foaming the polyethylene pre-foamed particles by using water as a foaming agent to prepare foamed polyethylene with high melt strength;
s3, mixing the foamed polyethylene with high melt strength and water in a high-speed mixer for 10min to prepare the water masterbatch.
Further, the odor auxiliary adsorbent is refined diatomite with fineness of more than 800 meshes, and is provided by four chemical companies in Japan.
Further, the refined diatomite is prepared by selecting diatomite with the silicon dioxide content of more than 90% and performing acid treatment on the diatomite.
Further, the acid treatment method comprises the following steps: after the diatomaceous earth was soaked in a 30% sulfuric acid solution at 120 ℃ for 10 minutes, the sulfuric acid solution was removed, and dried at 150 ℃ for 30 minutes to obtain purified diatomaceous earth.
Further, the additive also comprises 0-10 wt% of antioxidant 1010 or antioxidant 168 in any proportion.
A preparation method of a low-odor SEBS elastomer material for vehicles comprises the following steps:
s1, weighing SEBS, paraffin oil, smell auxiliary adsorbent refined diatomite and an additive according to the raw materials in the set weight percentage, adding the SEBS, the paraffin oil, the smell auxiliary adsorbent refined diatomite and the additive into a high-speed mixer, mixing for 3-10min, and adding the mixture into a double-screw extruder at the first section after uniformly mixing;
s2, adding the aqueous master batch of the main odor adsorbent into the fourth section or the first section of the double screw;
and S3, carrying out melt extrusion, granulating and drying to obtain the low-odor SEBS elastomer material for the vehicle.
Preferably, the melt extrusion conditions in step S3 are that the temperature is 170-195 ℃ and the length-diameter ratio of the twin-screw extruder is 48: 1.
Compared with the prior art, the invention has the following beneficial effects:
according to the low-odor SEBS elastomer material for the vehicle and the preparation method thereof, the main adsorbent and the auxiliary adsorbent have a synergistic adsorption effect, diatomite is firstly fused and blended with SEBS and other components to form a uniformly dispersed phase structure, then the water-containing master batch is added, and small molecular substances in the SEBS, which cause odor generation, are taken away by water in the master batch, so that the contact area is greatly enlarged due to the microporous structure of the diatomite, and the small molecular substances are promoted to be removed more quickly and effectively; the diatomite is an inorganic filler and is added into the SEBS to play a role in filling and reinforcing, so that the rigidity and the modulus of the SEBS can be improved besides the odor absorption function; the untreated diatomite contains a lot of oxide impurities, after acid treatment, the content of effective component silicon dioxide in the diatomite is increased, corresponding parameters such as specific surface area, pore volume and the like are increased, the odor adsorption effect is more obvious, and the preferred adsorbent effect of the acid-treated diatomite is more obvious; the polyethylene has relatively low molecular weight in the SEBS, and is easy to migrate to the surface of a material during injection molding of a later product, so that a certain lubricating effect is achieved, and the function of improving processing is also achieved. The automobile odor-resistant coating has good mechanical properties, temperature change resistance and other properties, more importantly solves the problem of odor which is difficult to overcome by the existing similar products, is mainly used in the automobile field, and can also be popularized and used in other fields.
The foregoing is a summary of the technical solutions of the present invention, and the present invention is further described below with reference to specific embodiments.
The specific implementation mode is as follows:
in order to make the objects, technical solutions and advantages of the present invention more apparent, the following embodiments are described in detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Examples 1 to 4 and comparative examples 1 to 6 provide a low-odor SEBS elastomer material for vehicles, which comprises the following raw material components in percentage by weight in the following table 1; wherein the SEBS is hydrogenated styrene butadiene block copolymer with the weight-average molecular weight of 180000-210000, and the SEBS G1651 is sold by Keteng of the United states; the main odor adsorbent is water-containing master batch which takes foamed polyethylene as a master batch carrier and has the water content accounting for 60-80 wt% of the water-containing master batch; the aqueous master batch is prepared by adopting the following method, and comprises the following steps: s1, extruding the polyethylene into strip polyethylene in an extruder, and chopping the polyethylene into polyethylene pre-expanded particles; s2, foaming the polyethylene pre-foamed particles by using water as a foaming agent to prepare foamed polyethylene with high melt strength; s3, mixing the foamed polyethylene with high melt strength and water in a high-speed mixer for 10min to prepare the water masterbatch. The foamed polyethylene is selected as the carrier, so that the carrier and the SEBS have good compatibility, and the mechanical property of the SEBS cannot be damaged. The odor auxiliary adsorbent is refined diatomite with fineness of over 800 meshes. The diatomite is an inorganic filler and is added into the SEBS to play a role in filling and reinforcing, so that the rigidity and the modulus of the SEBS can be improved besides the odor absorption function. The main adsorbent and the auxiliary adsorbent have a synergistic adsorption effect: the diatomite is firstly melt-blended with the SEBS and other components to form a uniformly dispersed phase structure, and then the water-containing master batch is added, so that the micromolecule substances causing odor generation in the SEBS are taken away by the water in the master batch, and the contact area is greatly enlarged due to the microporous structure of the diatomite, and the micromolecule substances are promoted to be removed more quickly and effectively. The polyethylene has relatively low molecular weight in the SEBS, and is easy to migrate to the surface of a material during injection molding of a later product, so that a certain lubricating effect is achieved, and the function of improving processing is also achieved.
The preferable refined diatomite is prepared by selecting diatomite with the silicon dioxide content of more than 90 percent and performing acid treatment; the acid treatment method comprises the following steps: after the diatomaceous earth was soaked in a 30% sulfuric acid solution at 120 ℃ for 10 minutes, the sulfuric acid solution was removed, and dried at 150 ℃ for 30 minutes to obtain purified diatomaceous earth. The untreated diatomite contains a lot of oxide impurities, after acid treatment, the content of effective component silicon dioxide in the diatomite is increased, corresponding parameters such as specific surface area, pore volume and the like are increased, the odor adsorption effect is more obvious, and the preferred adsorbent effect of the acid-treated diatomite is more obvious.
The preparation methods of the low-odor SEBS elastomer materials for the vehicles of the examples 1 to 4 and the comparative examples 1 to 6 comprise the following steps:
s1, weighing SEBS, paraffin oil, smell auxiliary adsorbent refined diatomite and an additive according to the raw materials in the set weight percentage, adding the SEBS, the paraffin oil, the smell auxiliary adsorbent refined diatomite and the additive into a high-speed mixer, mixing for 3-10min, and adding the mixture into a double-screw extruder at the first section after uniformly mixing;
s2, adding the aqueous master batch of the main odor adsorbent into the fourth section or the first section of the double screw;
s3, carrying out melt extrusion, granulating and drying to obtain the low-odor SEBS elastomer material for the vehicle; the conditions of melt extrusion are that the temperature is 170-195 ℃ and the length-diameter ratio of a double screw extruder is 48: 1.
Table 1: the weight percentages of the raw material components of examples 1-4 and comparative examples 1-6
(1) Example 1vs comparative example 1 shows that varying the ratio of SEBS and paraffin oil has little effect on odor rating.
(2) Example 2vs comparative example 2 illustrates that without the addition of acid treatment of diatomaceous earth, the odor rating rose from 3.5 to 4.0.
(3) Example 3vs comparative example 3 illustrates that without the addition of the hydrous master batch, the odor rating increased substantially from 3.0 to 4.0-4.5, indicating that the odor increase was significant with the addition of diatomaceous earth alone and without the addition of the hydrous master batch
(4) Example 4vs comparative example 4 illustrates that the odor rating increased from 3.5 to 4.0 when the acid treated diatomaceous earth was changed to untreated diatomaceous earth. The untreated diatomite contains a lot of oxide impurities, after acid treatment, the content of effective component silicon dioxide in the diatomite is increased, corresponding parameters such as specific surface area, pore volume and the like are increased, the odor adsorption effect is more obvious, and therefore, the adsorbent effect of the acid-treated diatomite is more obvious.
(5) Comparative example 5 the odor grade increased from 3.0 to 4.0 after the aqueous masterbatch from example 3 was added from the side feed of the fourth stage of the twin screw extruder instead of the aqueous masterbatch from the first stage of the twin screw extruder along with all other ingredients, illustrating the importance of the manner in which the aqueous masterbatch was added
(6) Comparative example 6 the importance of the mode of addition of the aqueous masterbatch was demonstrated by feeding the aqueous masterbatch of example 4 from the side of the fourth stage of the twin screw extruder, but instead the aqueous masterbatch was fed from the first stage of the twin screw extruder along with all the other ingredients, the odor rating increased from 3.5 to 4.0-4.5. Because the water-containing master batch is added from the first stage, the smell auxiliary adsorbent kieselguhr cannot be melted and blended with the components such as SEBS and the like to form a uniformly dispersed phase structure, and the moisture in the water-containing master batch cannot be volatilized early enough to adsorb the smell, so that the feeding mode cannot achieve the synergistic effect of the two smell adsorbents. If the odor auxiliary adsorbent kieselguhr is firstly fused and blended with the components such as the SEBS and the like to form a uniformly dispersed phase structure, then the odor main adsorbent water-containing master batch is added from the fourth section of the double-screw extruder, the micromolecule substances causing odor generation in the SEBS can be effectively taken away by the water in the master batch, the contact area is greatly enlarged by the micropore structure of the kieselguhr, the micromolecule substances are promoted to be removed more quickly and effectively, the effects of the two odor adsorbents are well played, and a good synergistic effect is achieved.
Odor determination standards for examples 1-4 and comparative examples 1-6 above: a method for testing the smell in a simulated vehicle is formulated by adopting the PV3900 standard of Germany public automobile company and combining the actual use condition of consumers after loading. Firstly, a sample to be tested is placed at the temperature of-30 ℃ to 90 ℃ for 10 cold and hot cycles to simulate the environment before the automobile is delivered to a consumer, and the specific conditions are as follows: the mixture stays at minus 30 ℃ for 11 hours, then the temperature is raised to 90 ℃ within 1 hour, the mixture stays at 90 ℃ for 11 hours, then the temperature is lowered to minus 30 ℃ within 1 hour, and the total time of one cycle is 24 hours. And then carrying out evaluation of grade 1-6 by adopting the PV3900 standard of the public automobile company, wherein the higher the grade is, the larger the smell is. Table 2 below shows the evaluation contents of the standard PV3900 for controlling the odor in the cars by mass cars, and the scores are divided into 6 grades. The method is that a sample which is subjected to super-cooling thermal cycle is placed in a sealed vessel under the experimental condition of 80 ℃, the temperature is kept unchanged, and after the sample is placed for 2 hours, the odor of the part is tested by professional according to the smell.
Table 2: evaluation standard of odor of popular automobile interior material
Variations and modifications to the above-described embodiments may occur to those skilled in the art, which fall within the scope and spirit of the above description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention.
Claims (10)
1. The SEBS elastomer material for the low-odor vehicle is characterized by comprising the following components in percentage by weight: 60-81 wt% of SEBS, 15-25 wt% of paraffin oil, 1-5 wt% of main odor adsorbent and 3-10 wt% of auxiliary odor adsorbent.
2. The SEBS elastomer material for the low-odor vehicle as claimed in claim 1, wherein the SEBS is a hydrogenated styrene butadiene block copolymer with a weight average molecular weight of 180000-210000.
3. The SEBS elastomer material for the low-odor vehicle as claimed in claim 1, wherein the main odor adsorbent is an aqueous master batch, the aqueous master batch takes foamed polyethylene as a master batch carrier, and the water content accounts for 60-80 wt% of the aqueous master batch.
4. The SEBS elastomer material for the low-odor vehicle as claimed in claim 3, wherein the water-containing master batch is prepared by the following method, comprising the steps of:
s1, extruding the polyethylene into strip polyethylene in an extruder, and chopping the polyethylene into polyethylene pre-expanded particles;
s2, foaming the polyethylene pre-foamed particles by using water as a foaming agent to prepare foamed polyethylene with high melt strength;
s3, mixing the foamed polyethylene with high melt strength and water in a high-speed mixer for 10min to prepare the water masterbatch.
5. The SEBS elastomer material for the low-odor vehicle as claimed in claim 1, wherein the odor auxiliary adsorbent is refined diatomite with a fineness of 800 mesh or more.
6. The SEBS elastomer material for the vehicle with the low odor as claimed in claim 5, wherein the refined diatomite is prepared by selecting diatomite with more than 90% of silicon dioxide content and performing acid treatment on the diatomite.
7. The SEBS elastomer material for a low-odor vehicle as claimed in claim 6, wherein the acid treatment method comprises: after the diatomaceous earth was soaked in a 30% sulfuric acid solution at 120 ℃ for 10 minutes, the sulfuric acid solution was removed, and dried at 150 ℃ for 30 minutes to obtain purified diatomaceous earth.
8. The SEBS elastomer material for the low-odor vehicle as claimed in claim 1, wherein the SEBS elastomer material further comprises 0-10 wt% of an additive, and the additive is antioxidant 1010 or antioxidant 168 in any proportion.
9. A process for the preparation of a low odor SEBS elastomeric material for vehicles as in any one of claims 1 to 8, comprising the steps of:
s1, weighing SEBS, paraffin oil, smell auxiliary adsorbent refined diatomite and an additive according to the raw materials in the set weight percentage, adding the SEBS, the paraffin oil, the smell auxiliary adsorbent refined diatomite and the additive into a high-speed mixer, mixing for 3-10min, and adding the mixture into a double-screw extruder at the first section after uniformly mixing;
s2, adding the aqueous master batch of the main odor adsorbent into the fourth section or the first section of the double screw;
and S3, carrying out melt extrusion, granulating and drying to obtain the low-odor SEBS elastomer material for the vehicle.
10. The preparation method of the SEBS elastomer material for the low-odor vehicle as claimed in claim 9, wherein the melt extrusion conditions in the step S3 are that the temperature is 170-195 ℃ and the length-diameter ratio of a twin-screw extruder is 48: 1.
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