CN112592536A - Low-atomization polypropylene and preparation method thereof - Google Patents
Low-atomization polypropylene and preparation method thereof Download PDFInfo
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- CN112592536A CN112592536A CN202011532521.3A CN202011532521A CN112592536A CN 112592536 A CN112592536 A CN 112592536A CN 202011532521 A CN202011532521 A CN 202011532521A CN 112592536 A CN112592536 A CN 112592536A
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- -1 polypropylene Polymers 0.000 title claims abstract description 118
- 239000004743 Polypropylene Substances 0.000 title claims abstract description 117
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 112
- 238000000889 atomisation Methods 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 239000003463 adsorbent Substances 0.000 claims abstract description 38
- 239000006057 Non-nutritive feed additive Substances 0.000 claims abstract description 32
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 32
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 32
- 229910052901 montmorillonite Inorganic materials 0.000 claims abstract description 30
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000000463 material Substances 0.000 claims abstract description 16
- 238000001125 extrusion Methods 0.000 claims abstract description 12
- 238000005469 granulation Methods 0.000 claims abstract description 11
- 230000003179 granulation Effects 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims abstract 2
- 239000000243 solution Substances 0.000 claims description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 18
- 239000012153 distilled water Substances 0.000 claims description 18
- 238000001035 drying Methods 0.000 claims description 18
- 238000003756 stirring Methods 0.000 claims description 16
- 239000011347 resin Substances 0.000 claims description 13
- 229920005989 resin Polymers 0.000 claims description 13
- 239000000155 melt Substances 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 11
- 238000005086 pumping Methods 0.000 claims description 10
- 238000000227 grinding Methods 0.000 claims description 9
- 239000011259 mixed solution Substances 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 9
- 238000000967 suction filtration Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000000314 lubricant Substances 0.000 claims description 5
- 239000004611 light stabiliser Substances 0.000 claims description 3
- 125000005210 alkyl ammonium group Chemical group 0.000 claims description 2
- 125000004432 carbon atom Chemical group C* 0.000 claims description 2
- 239000003973 paint Substances 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 6
- 230000004048 modification Effects 0.000 abstract description 4
- 238000012986 modification Methods 0.000 abstract description 4
- 239000006185 dispersion Substances 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 abstract description 3
- 239000002131 composite material Substances 0.000 abstract description 2
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 7
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 7
- 230000035943 smell Effects 0.000 description 7
- 229910052708 sodium Inorganic materials 0.000 description 7
- 239000011734 sodium Substances 0.000 description 7
- 238000012360 testing method Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 4
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical group [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 4
- 230000002452 interceptive effect Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000012752 auxiliary agent Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 230000008520 organization Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- CXRFDZFCGOPDTD-UHFFFAOYSA-M Cetrimide Chemical compound [Br-].CCCCCCCCCCCCCC[N+](C)(C)C CXRFDZFCGOPDTD-UHFFFAOYSA-M 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- XJWSAJYUBXQQDR-UHFFFAOYSA-M dodecyltrimethylammonium bromide Chemical compound [Br-].CCCCCCCCCCCC[N+](C)(C)C XJWSAJYUBXQQDR-UHFFFAOYSA-M 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000011361 granulated particle Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- JRMUNVKIHCOMHV-UHFFFAOYSA-M tetrabutylammonium bromide Chemical compound [Br-].CCCC[N+](CCCC)(CCCC)CCCC JRMUNVKIHCOMHV-UHFFFAOYSA-M 0.000 description 1
- SZEMGTQCPRNXEG-UHFFFAOYSA-M trimethyl(octadecyl)azanium;bromide Chemical compound [Br-].CCCCCCCCCCCCCCCCCC[N+](C)(C)C SZEMGTQCPRNXEG-UHFFFAOYSA-M 0.000 description 1
Classifications
-
- 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
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
-
- 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
- C08K3/34—Silicon-containing compounds
- C08K3/346—Clay
-
- 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
- C08K5/134—Phenols containing ester groups
- C08K5/1345—Carboxylic esters of phenolcarboxylic acids
-
- 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
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/52—Phosphorus bound to oxygen only
- C08K5/524—Esters of phosphorous acids, e.g. of H3PO3
- C08K5/526—Esters of phosphorous acids, e.g. of H3PO3 with hydroxyaryl compounds
-
- 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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
- C08K7/26—Silicon- containing compounds
-
- 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
- C08K9/00—Use of pretreated ingredients
- C08K9/02—Ingredients treated with inorganic substances
-
- 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
- C08K2201/011—Nanostructured additives
Abstract
The invention belongs to the field of low-atomization PP materials, and particularly relates to low-atomization polypropylene and a preparation method thereof. The polypropylene of the invention is prepared from the following components in parts by weight: 96-99.75 parts of polypropylene; 0.1-5 parts of antioxidant, 0.1-5 parts of processing aid and 0.05-3 parts of odor adsorbent. The preparation method comprises the following steps: 96-99.75 parts of polypropylene; 0.1-0.5 part of antioxidant; 0.1-0.5 part of processing aid; 0.05-3 parts of odor adsorbent are uniformly mixed, and the low-atomization polypropylene is obtained through melt extrusion and granulation of a modified 48:1 double-screw extruder. Compared with the prior art, the invention realizes the composite modification of the montmorillonite by combining the formula design and the manufacturing process, realizes the low atomization of the polypropylene by improving the dispersion of the nano-montmorillonite in the PP, and has the advantages of obvious odor improvement, no post-treatment process and the like.
Description
Technical Field
The invention belongs to the technical field of PP materials. More particularly, it relates to a low-fogging polypropylene and a preparation method thereof.
Background
With the rapid development of the automobile industry and the increasing requirements of domestic environmental protection, higher requirements are put forward for the environmental protection of automobiles. The modified polypropylene is used as a common material for automobile parts, and has the outstanding advantages of wide source, low density, good mechanical balance, chemical corrosion resistance, easy processing, low price and the like. However, the polypropylene material for the automotive interior inevitably generates a large amount of volatile organic micromolecules in the processes of synthesis, modification, injection molding and the like, and the environment in the automobile is relatively closed, so that the content of organic substances emitted by the automobile exceeds the standard, and the health of passengers in the automobile is influenced; meanwhile, the degradation of the polypropylene resin and the addition of the auxiliary agent also affect the environment in the vehicle and the comfort of passengers.
CN111073140A discloses a low-density and low-odor modified polypropylene composite material for vehicles and a preparation method thereof, wherein the modified polypropylene mainly comprises 60-90 parts of conventional polypropylene, 5-10 parts of nano montmorillonite, 8-20 parts of elastomer, 0.1-1.5 parts of antioxidant and 0-3 parts of other auxiliary agents. The modified polypropylene particles are mainly obtained by blending nano montmorillonite with gas barrier capability and conventional polypropylene through a double screw or an injection molding machine to extrude a strip blend, cooling the blend by circulating water, and then feeding the cooled blend into a granulator to be granulated. The nano multi-montmorillonite has uniform particle size and chemical stability, endows the modified polypropylene with excellent comprehensive mechanical properties, can effectively capture and adsorb small molecular substances and unpleasant odor generated by the degradation of the polypropylene in the extrusion process, and endows the modified polypropylene with low odor and low emission characteristics. It does not achieve low fogging of polypropylene and the odor is still high.
Therefore, how to realize low fogging of polypropylene and lower odor is still a technical problem to be solved urgently.
Disclosure of Invention
The invention aims to solve the technical problems of high atomization and large odor release of the existing polypropylene and provides low-atomization polypropylene and a preparation method thereof.
The invention aims to provide low-fogging polypropylene.
Another object of the present invention is to provide a method for preparing low fogging polypropylene.
The above purpose of the invention is realized by the following technical scheme:
the low-fogging polypropylene comprises the following components in parts by weight:
96-99.75 parts of polypropylene;
0.1-0.5 part of antioxidant;
0.1-0.5 part of processing aid;
0.05-3 parts of odor adsorbent.
Preferably, the polypropylene is a polypropylene resin having a melt index of 0.2 to 120g/10min (test conditions of 230 ℃ C., 2.16 kg).
Preferably, the polypropylene is a polypropylene resin with a melt index of 33g/10 min.
Preferably, the antioxidant is 1010 or 168; the processing aid is one or more of a light stabilizer or a lubricant.
Preferably, the light stabilizer is 3808PP5, and the lubricant is zinc stearate or an EBS lubricant.
Preferably, the odor adsorbent is prepared by dissolving 8-12g of nano-scale sodium-based montmorillonite in 400mL of distilled water, and adding 3-5g of alkylamine salt and 1-3mL of concentrated hydrochloric acid into 100mL of distilled water; dropwise adding the mixed solution into the montmorillonite solution, stirring with a magnetic stirrer at 60-80 deg.C, heating and stirring for 1-3h or oscillating with an ultrasonic oscillator at 90% power for 1 h; and after multiple suction filtration, drying the solution in an oven at the temperature of 100-110 ℃ for 10-14h, and grinding the solution into powder to obtain the odor adsorbent.
Preferably, the alkylamine salt is a long-chain alkylammonium salt having a total number of carbon atoms of 8 or more.
Preferably, the alkylamine salt is one or more of dodecyl trimethyl ammonium bromide, tetradecyl trimethyl ammonium bromide, hexadecyl trimethyl ammonium bromide, octadecyl trimethyl ammonium bromide and tetrabutyl ammonium bromide.
The preparation method of the low-fogging polypropylene comprises the following steps:
adding polypropylene, an antioxidant, a processing aid and an odor adsorbent into a high-speed mixer together according to parts by weight, uniformly mixing, adding the mixed material into a modified double-screw extruder from a main feed opening, and carrying out melt extrusion and granulation to obtain low-atomization polypropylene; the structure of the improved double-screw extruder is as follows: the length-diameter ratio is 48:1, 12 screw barrels are provided, the 1 st screw barrel is a feed opening, independent vacuum pumping devices are arranged at a plurality of screw barrels at the rear end, and the vacuum degree is required to be below-0.08 MPa.
Preferably, the double-screw extruder has 12 zones in total, the temperature of the first zone is set to be 80-120 ℃, the temperature of the second zone-the fourth zone is set to be 180-210 ℃, and the temperature of the fifth zone-the twelfth zone is set to be 170-200 ℃.
Based on the application of the low-fogging polypropylene, the low-fogging polypropylene is applied to automobile interior decoration products.
The invention has the following beneficial effects:
because the montmorillonite has the porous characteristic and endows the montmorillonite with an ultra-large specific surface area, organic micromolecules generated in the processing process of polypropylene are adsorbed by a porous structure, and the montmorillonite is endowed with good smell. The invention adjusts the different proportions of the two montmorillonite modifiers to realize the organization of montmorillonite and simultaneously has larger interlayer spacing, improves the dispersion of nano-montmorillonite in PP to realize the low atomization of polypropylene, and has the advantages of obvious odor improvement, no post-treatment process and the like.
Detailed Description
The present invention is further illustrated by the following specific examples, which are not intended to limit the invention in any way. Reagents, methods and apparatus used in the present invention are conventional in the art unless otherwise indicated.
Unless otherwise indicated, reagents and materials used in the following examples are commercially available.
Example 1
A low-fogging polypropylene, which is prepared from the following components in parts by weight:
98.5 parts of polypropylene; the polypropylene is polypropylene resin with the melt index of 33g/10 min;
0.5 part of antioxidant; the antioxidant is 1010;
0.5 part of processing aid; the processing aid is 3808PP 5;
0.5 part of odor adsorbent.
The odor adsorbent is prepared by dissolving 10g of nano-scale sodium-based montmorillonite in 400mL of distilled water, and adding 4g of hexadecyl trimethyl ammonium bromide and 2mL of concentrated hydrochloric acid into 100mL of distilled water; dropwise adding the mixed solution into the montmorillonite solution, stirring by a magnetic stirrer at 70 ℃, heating and stirring for 2 hours or oscillating by an ultrasonic oscillator for 1 hour at 90% power; after multiple times of suction filtration, drying the solution in a drying oven at 105 ℃ for 12 hours until no chloride ions exist in the solution, and grinding the solution into powder to obtain the odor adsorbent;
the preparation method of the low-fogging polypropylene comprises the following steps:
adding polypropylene, an antioxidant, a processing aid and an odor adsorbent into a high-speed mixer together according to parts by weight, uniformly mixing, adding the mixed material into a modified double-screw extruder from a main feed opening, and carrying out melt extrusion and granulation to obtain low-atomization polypropylene; the structure of the improved double-screw extruder is as follows: the length-diameter ratio is 48:1, 12 screw barrels are provided, the 1 st screw barrel is a feed opening, independent vacuum pumping devices are arranged at a plurality of screw barrels at the rear end, the vacuum degree is required to be below-0.08 MPa, and the temperatures from the 1 st to the 12 th screw barrels are respectively 100 ℃, 180 ℃, 195 ℃, 170 ℃, 175 ℃, 180 ℃, 190 ℃, 195 ℃ and 200 ℃.
Example 2
A low-fogging polypropylene, which is prepared from the following components in parts by weight:
98.5 parts of polypropylene; the polypropylene is polypropylene resin with the melt index of 33g/10 min;
0.5 part of antioxidant; the antioxidant is 168;
0.5 part of processing aid; the processing aid is zinc stearate;
and 1 part of odor adsorbent.
The odor adsorbent is prepared by dissolving 10g of nano-scale sodium montmorillonite in 400mL of distilled water, and adding 4g of alkylamine salt and 2mL of concentrated hydrochloric acid into 100mL of distilled water; dropwise adding the mixed solution into the montmorillonite solution, and oscillating for 1h at 90% power by an ultrasonic oscillator; after multiple times of suction filtration, drying the solution in a drying oven at 105 ℃ for 12 hours until no chloride ions exist in the solution, and grinding the solution into powder to obtain the odor adsorbent;
the preparation method of the low-fogging polypropylene comprises the following steps:
adding polypropylene, an antioxidant, a processing aid and an odor adsorbent into a high-speed mixer together according to parts by weight, uniformly mixing, adding the mixed material into a modified double-screw extruder from a main feed opening, and carrying out melt extrusion and granulation to obtain low-atomization polypropylene; the structure of the improved double-screw extruder is as follows: the length-diameter ratio is 48:1, 12 screw barrels are provided, the 1 st screw barrel is a feed opening, independent vacuum pumping devices are arranged at a plurality of screw barrels at the rear end, the vacuum degree is required to be below-0.08 MPa, and the temperatures from the 1 st to the 12 th screw barrels are respectively 100 ℃, 180 ℃, 195 ℃, 170 ℃, 175 ℃, 180 ℃, 190 ℃, 195 ℃ and 200 ℃.
Example 3
A low-fogging polypropylene, which is prepared from the following components in parts by weight:
96 parts of polypropylene; the polypropylene is polypropylene resin with the melt index of 20g/10 min;
0.1 part of antioxidant; the antioxidant is 168;
0.2 part of processing aid; the processing aid is zinc stearate;
and 1 part of odor adsorbent.
The odor adsorbent is prepared by dissolving 10g of nano-scale sodium-based montmorillonite in 400mL of distilled water, and adding 4g of hexadecyl trimethyl ammonium bromide and 2mL of concentrated hydrochloric acid into 100mL of distilled water; dropwise adding the mixed solution into the montmorillonite solution, stirring by a magnetic stirrer at 70 ℃, heating and stirring for 2 hours or oscillating by an ultrasonic oscillator for 1 hour at 90% power; after multiple times of suction filtration, drying the solution in a drying oven at 105 ℃ for 12 hours until no chloride ions exist in the solution, and grinding the solution into powder to obtain the odor adsorbent;
the preparation method of the low-fogging polypropylene comprises the following steps:
adding polypropylene, an antioxidant, a processing aid and an odor adsorbent into a high-speed mixer together according to parts by weight, uniformly mixing, adding the mixed material into a modified double-screw extruder from a main feed opening, and carrying out melt extrusion and granulation to obtain low-atomization polypropylene; the structure of the improved double-screw extruder is as follows: the length-diameter ratio is 48:1, 12 screw barrels are provided, the 1 st screw barrel is a feed opening, independent vacuum pumping devices are arranged at a plurality of screw barrels at the rear end, the vacuum degree is required to be below-0.08 MPa, and the temperatures from the 1 st to the 12 th screw barrels are respectively 100 ℃, 180 ℃, 195 ℃, 170 ℃, 175 ℃, 180 ℃, 190 ℃, 195 ℃ and 200 ℃.
Example 4
A low-fogging polypropylene, which is prepared from the following components in parts by weight:
97 parts of polypropylene; the polypropylene is polypropylene resin with the melt index of 120g/10 min;
0.3 part of antioxidant; the antioxidant is 168;
0.4 part of processing aid; the processing aid is an EBS lubricant;
and 2 parts of odor adsorbent.
The odor adsorbent is prepared by dissolving 10g of nano-scale sodium-based montmorillonite in 400mL of distilled water, and adding 4g of hexadecyl trimethyl ammonium bromide and 2mL of concentrated hydrochloric acid into 100mL of distilled water; dropwise adding the mixed solution into the montmorillonite solution, stirring by a magnetic stirrer at 70 ℃, heating and stirring for 2 hours or oscillating by an ultrasonic oscillator for 1 hour at 90% power; after multiple times of suction filtration, drying the solution in a drying oven at 105 ℃ for 12 hours until no chloride ions exist in the solution, and grinding the solution into powder to obtain the odor adsorbent;
the preparation method of the low-fogging polypropylene comprises the following steps:
adding polypropylene, an antioxidant, a processing aid and an odor adsorbent into a high-speed mixer together according to parts by weight, uniformly mixing, adding the mixed material into a modified double-screw extruder from a main feed opening, and carrying out melt extrusion and granulation to obtain low-atomization polypropylene; the structure of the improved double-screw extruder is as follows: the length-diameter ratio is 48:1, 12 screw barrels are provided, the 1 st screw barrel is a feed opening, independent vacuum pumping devices are arranged at a plurality of screw barrels at the rear end, the vacuum degree is required to be below-0.08 MPa, and the temperatures from the 1 st to the 12 th screw barrels are respectively 100 ℃, 180 ℃, 195 ℃, 170 ℃, 175 ℃, 180 ℃, 190 ℃, 195 ℃ and 200 ℃.
Example 5
A low-fogging polypropylene, which is prepared from the following components in parts by weight:
98 parts of polypropylene; the polypropylene is polypropylene resin with the melt index of 100g/10 min;
0.4 part of antioxidant; the antioxidant is 1010;
0.3 part of processing aid; the processing aid is zinc stearate;
and 2.5 parts of an odor adsorbent.
The odor adsorbent is prepared by dissolving 10g of nano-scale sodium-based montmorillonite in 400mL of distilled water, and adding 4g of hexadecyl trimethyl ammonium bromide and 2mL of concentrated hydrochloric acid into 100mL of distilled water; dropwise adding the mixed solution into the montmorillonite solution, stirring by a magnetic stirrer at 70 ℃, heating and stirring for 2 hours or oscillating by an ultrasonic oscillator for 1 hour at 90% power; after multiple times of suction filtration, drying the solution in a drying oven at 105 ℃ for 12 hours until no chloride ions exist in the solution, and grinding the solution into powder to obtain the odor adsorbent;
the preparation method of the low-fogging polypropylene comprises the following steps:
adding polypropylene, an antioxidant, a processing aid and an odor adsorbent into a high-speed mixer together according to parts by weight, uniformly mixing, adding the mixed material into a modified double-screw extruder from a main feed opening, and carrying out melt extrusion and granulation to obtain low-atomization polypropylene; the structure of the improved double-screw extruder is as follows: the length-diameter ratio is 48:1, 12 screw barrels are provided, the 1 st screw barrel is a feed opening, independent vacuum pumping devices are arranged at a plurality of screw barrels at the rear end, the vacuum degree is required to be below-0.08 MPa, and the temperatures from the 1 st to the 12 th screw barrels are respectively 100 ℃, 180 ℃, 195 ℃, 170 ℃, 175 ℃, 180 ℃, 190 ℃, 195 ℃ and 200 ℃.
Example 6
A low-fogging polypropylene, which is prepared from the following components in parts by weight:
99.75 parts of polypropylene; the polypropylene is polypropylene resin with the melt index of 33g/10 min;
0.2 part of antioxidant; the antioxidant is 1010;
0.4 part of processing aid; the processing aid is 3808PP 5;
3 parts of odor adsorbent.
The odor adsorbent is prepared by dissolving 10g of nano-scale sodium-based montmorillonite in 400mL of distilled water, and adding 4g of hexadecyl trimethyl ammonium bromide and 2mL of concentrated hydrochloric acid into 100mL of distilled water; dropwise adding the mixed solution into the montmorillonite solution, stirring by a magnetic stirrer at 70 ℃, heating and stirring for 2 hours or oscillating by an ultrasonic oscillator for 1 hour at 90% power; after multiple times of suction filtration, drying the solution in a drying oven at 105 ℃ for 12 hours until no chloride ions exist in the solution, and grinding the solution into powder to obtain the odor adsorbent;
the preparation method of the low-fogging polypropylene comprises the following steps:
adding polypropylene, an antioxidant, a processing aid and an odor adsorbent into a high-speed mixer together according to parts by weight, uniformly mixing, adding the mixed material into a modified double-screw extruder from a main feed opening, and carrying out melt extrusion and granulation to obtain low-atomization polypropylene; the structure of the improved double-screw extruder is as follows: the length-diameter ratio is 48:1, 12 screw barrels are provided, the 1 st screw barrel is a feed opening, independent vacuum pumping devices are arranged at a plurality of screw barrels at the rear end, the vacuum degree is required to be below-0.08 MPa, and the temperatures from the 1 st to the 12 th screw barrels are respectively 100 ℃, 180 ℃, 195 ℃, 170 ℃, 175 ℃, 180 ℃, 190 ℃, 195 ℃ and 200 ℃.
Comparative example 1
A low-fogging polypropylene, which is prepared from the following components in parts by weight:
98.5 parts of polypropylene; the polypropylene is polypropylene resin with the melt index of 33g/10 min;
0.5 part of antioxidant; the antioxidant is 1010;
0.5 part of processing aid; the processing aid is 3808PP 5.
The preparation method of the low-fogging polypropylene comprises the following steps:
adding polypropylene, an antioxidant and a processing aid into a high-speed mixer together according to parts by weight, uniformly mixing, and then putting the mixed material into a modified double-screw extruder from a main feed opening for melt extrusion and granulation to obtain low-atomization polypropylene; the structure of the improved double-screw extruder is as follows: the length-diameter ratio is 48:1, 12 screw barrels are provided, the 1 st screw barrel is a feed opening, independent vacuum pumping devices are arranged at a plurality of screw barrels at the rear end, the vacuum degree is required to be below-0.08 MPa, and the temperatures from the 1 st to the 12 th screw barrels are respectively 100 ℃, 180 ℃, 195 ℃, 170 ℃, 175 ℃, 180 ℃, 190 ℃, 195 ℃ and 200 ℃.
Comparative example 2
A low-fogging polypropylene, which is prepared from the following components in parts by weight:
98 parts of polypropylene; the polypropylene is polypropylene resin with the melt index of 100g/10 min;
0.4 part of antioxidant; the antioxidant is 1010;
0.5 part of processing aid; the processing aid is 3808PP 5;
4 parts of odor adsorbent.
The odor adsorbent is prepared by dissolving 10g of nano-scale sodium-based montmorillonite in 400mL of distilled water, and adding 4g of hexadecyl trimethyl ammonium bromide and 2mL of concentrated hydrochloric acid into 100mL of distilled water; dropwise adding the mixed solution into the montmorillonite solution, stirring by a magnetic stirrer at 70 ℃, heating and stirring for 2 hours or oscillating by an ultrasonic oscillator for 1 hour at 90% power; after multiple times of suction filtration, drying the solution in a drying oven at 105 ℃ for 12 hours until no chloride ions exist in the solution, and grinding the solution into powder to obtain the odor adsorbent;
the preparation method of the low-fogging polypropylene comprises the following steps:
adding polypropylene, an antioxidant, a processing aid and an odor adsorbent into a high-speed mixer together according to parts by weight, uniformly mixing, adding the mixed material into a modified double-screw extruder from a main feed opening, and carrying out melt extrusion and granulation to obtain low-atomization polypropylene; the structure of the improved double-screw extruder is as follows: the length-diameter ratio is 48:1, 12 screw barrels are provided, the 1 st screw barrel is a feed opening, independent vacuum pumping devices are arranged at a plurality of screw barrels at the rear end, the vacuum degree is required to be below-0.08 MPa, and the temperatures from the 1 st to the 12 th screw barrels are respectively 100 ℃, 180 ℃, 195 ℃, 170 ℃, 175 ℃, 180 ℃, 190 ℃, 195 ℃ and 200 ℃.
Odor evaluation methods and criteria- -following Shanghai Volkswagen PV3900 criteria, the test results are shown in Table 1 below.
The odor grade of the material is divided into the following according to the standard: level 1: no smell; and 2, stage: smells, but no interfering smells; and 3, level: has obvious smell but no interference smell; 4, level: an interfering odor; and 5, stage: strong interfering odor; and 6, level: there is an intolerable smell.
The specific method comprises the following steps: 20g of the above granulated particles are put into a 1L test vessel, and then put into a constant temperature drying oven to be dried for 2h +/-10 min, wherein the temperature of the drying oven is set to (80 +/-2 ℃) DEG C, and the test vessel is required to be tightly sealed. After removal from the oven, the test vessel was cooled to (60. + -.5) ℃ and the cap was removed slightly and evaluated by a trained evaluator nose at a distance of (2-3) cm from the mouth of the bottle.
TABLE 1
Through the comparison examples of the examples 1-6 and the comparison examples 1-2, the invention realizes the organization of montmorillonite and has larger interlayer spacing by adjusting different proportions of two montmorillonite modifiers, improves the dispersion of nano-montmorillonite in PP to realize the low atomization of polypropylene, and has the advantages of obvious odor improvement, no post-treatment process and the like.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (9)
1. A low fogging polypropylene, characterized by: the paint comprises the following components in parts by weight:
96-99.75 parts of polypropylene;
0.1-0.5 part of antioxidant;
0.1-0.5 part of processing aid;
0.05-3 parts of odor adsorbent.
2. The low-fogging polypropylene according to claim 1, characterised in that: the polypropylene is polypropylene resin with the melt index of 0.2-120g/10 min.
3. The low-fogging polypropylene according to claim 2, characterised in that: the polypropylene is polypropylene resin with the melt index of 33g/10 min.
4. The low-fogging polypropylene according to any one of claims 1-3, characterised in that: the processing aid is one or more of a light stabilizer or a lubricant.
5. The low-fogging polypropylene according to claim 1, characterised in that: the odor adsorbent is prepared by dissolving 8-12g of nano-scale sodium montmorillonite in 400mL of distilled water, and adding 3-5g of alkylamine salt and 1-3mL of concentrated hydrochloric acid into 100mL of distilled water; dropwise adding the mixed solution into the montmorillonite solution, stirring with a magnetic stirrer at 60-80 deg.C, heating and stirring for 1-3h or oscillating with an ultrasonic oscillator at 90% power for 1 h; and after multiple suction filtration, drying the solution in an oven at the temperature of 100-110 ℃ for 10-14h, and grinding the solution into powder to obtain the odor adsorbent.
6. The low-fogging polypropylene according to claim 5, characterised in that: the alkylamine salt is long-chain alkylammonium salt with the total number of carbon atoms being 8 or more.
7. The process for preparing low-fogging polypropylene according to any one of claims 1 to 6, characterised in that: the preparation method comprises the following steps:
adding polypropylene, an antioxidant, a processing aid and an odor adsorbent into a high-speed mixer together according to parts by weight, uniformly mixing, adding the mixed material into a modified double-screw extruder from a main feed opening, and carrying out melt extrusion and granulation to obtain low-atomization polypropylene; the structure of the improved double-screw extruder is as follows: the length-diameter ratio is 48:1, 12 screw barrels are provided, the 1 st screw barrel is a feed opening, independent vacuum pumping devices are arranged at a plurality of screw barrels at the rear end, and the vacuum degree is required to be below-0.08 MPa.
8. The method of claim 7, wherein: the double-screw extruder has 12 zones in total, the temperature of the first zone is set to be 80-120 ℃, the temperature of the second zone-the fourth zone is set to be 180-210 ℃, and the temperature of the fifth zone-the twelfth zone is set to be 170-200 ℃.
9. Use of a low-fogging polypropylene according to any one of claims 1-6, characterised in that: the low-fogging polypropylene is applied to automotive interior products.
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