CN106243500B - A kind of preparation method and its product of polypropylene modification composite material - Google Patents
A kind of preparation method and its product of polypropylene modification composite material Download PDFInfo
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- CN106243500B CN106243500B CN201610694836.5A CN201610694836A CN106243500B CN 106243500 B CN106243500 B CN 106243500B CN 201610694836 A CN201610694836 A CN 201610694836A CN 106243500 B CN106243500 B CN 106243500B
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- 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
- C08K9/10—Encapsulated ingredients
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- 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
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
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- 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
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- 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
- C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- 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
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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- 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
- C08K2201/016—Additives defined by their aspect ratio
Abstract
The present invention provides a kind of preparation methods of polypropylene modification composite material, comprising the following steps: wollastonite in powder is tuned into the slurry of 50%-60% with water, odium stearate is added；In mass ratio be (4-6) by barium sulfate and titanium dioxide: 1 is made into the composite mortar of 65-70% with water, and odium stearate and silane coupling agent is added；By the titanium dioxide prepared-barium sulfate composite mortar wet grinding to 3000-4000 mesh；The mass ratio of titanium dioxide-barium sulfate composite mortar that the wollastonite slurry prepared addition is prepared, titanium dioxide-barium sulfate and wollastonite is (10-12): 1, then add silane coupling agent and coated；Composite mortar is dried to obtain composite material dry powder；Composite material dry powder is broken up into depolymerization, then through cyclone classified processing, collects the powder of 2500-3000 mesh.The present invention can obtain a kind of composite products with high durable, high glaze, high chemical stability.
Description
[technical field]
The present invention relates to the preparation method of modified filler field more particularly to a kind of polypropylene modification composite material and its
Product.
[background technique]
Polypropylene (PP) is one of five big general-purpose plastics, but polypropylene disadvantage is that property is crisp, impact strength is low, especially
Low temperature impact properties are poor, and dimensional accuracy is low, rigidity deficiency, weatherability difference etc., limits its application range and function
Development.In order to promote polyacrylic properties, need to be modified it processing.At present to modification side used by polypropylene
Formula is mainly chemical modification and physical modification, and chemical modification mainly changes polyacrylic molecule by the modes such as being copolymerized, being grafted
Structure changes its performance, and physical modification is then to change polyacrylic molecule aggregated structure by modes such as blending, enhancing, fillings
Achieve the purpose that improving performance without changing its molecular structure.Chemical modification and physical modification can improve polyacrylic property
Can, but chemical modification suffers from the limitation of many conditions, and needing to do a large amount of test can just be succeeded, and modified cost is wanted
Height, and physical modification has many advantages, such as to produce effects by comparison fastly, tests simple.In physical modification means, it is filling-modified be
Inorganic or organic filler is added in polypropylene, the performance for the filler that polypropylene molecule is added is assigned, to reach modified mesh
, filling-modified is the very extensive means of application in polypropylene or even modifying plastics, it can not only improve each of plastics
Item performance can also play the role of reducing cost simultaneously.
There are commonly calcium carbonate, talcum powder, silica, barium sulfate, kaolin, clouds for inorganic material filled modified polypropylene
Mother, wollastonite etc..In common inorganic modified technique, one kind is usually added or is individually added into several different fillers and leads to
It crosses the techniques such as melt blending and modification is filled to polypropylene.It is often unobvious to polyacrylic performance boost to add a kind of filler
Perhaps not perfect different fillers are individually added between often filler or cannot organically combine between filler and resin, cause to gather
Propylene modified effect is poor, and modified Properties of Polypropylene is promoted unobvious.
[summary of the invention]
In view of the above-mentioned drawbacks in the prior art, the purpose of the present invention is to provide a kind of polypropylene modification composite materials
Preparation method and its product, a kind of composite reinforcing material suitable for polypropylene modification can be obtained.
The technical scheme is that
A kind of preparation method of polypropylene modification composite material, which comprises the following steps:
(1) wollastonite in powder of 400-600 mesh is tuned into the slurry of mass concentration 50%-60% with water, odium stearate is added
As dispersing agent；
(2) be in mass ratio by the titanium dioxide of the barium sulfate of 400-600 mesh and 300-400 mesh (4-6): 1 is made into matter with water
The composite mortar of concentration 65-70% is measured, odium stearate and silane coupling agent is added as dispersing agent and coating material；
(3) titanium dioxide prepared in (2)-barium sulfate composite mortar is fed into Wet vertical grinder wet grinding extremely
3000-4000 mesh；
(4) the wollastonite slurry prepared in (1) is fed in Wet vertical grinder, the titanium that will be prepared in (3) is added
The mass ratio of white powder-barium sulfate composite mortar, titanium dioxide-barium sulfate and wollastonite is (10-12): 1, then add silane coupling agent
It is coated, the average grain diameter D of wet grinding to wollastonite particles50It is 2.0-2.5 μm；
(5) composite mortar obtained in (4) is fed into flash dryer, hot wind inlet temperature is controlled at 370-390 DEG C, obtained
To composite material dry powder；
(6) the composite material dry powder that (5) obtain is broken up into depolymerization, then through cyclone classified processing, collects 2500-3000 purpose
Powder obtains composite products.
Composite material is combined wollastonite, titanium dioxide and barium sulfate by mechanochemical method, makes titanium
White powder and barium sulfate is evenly distributed on wollastonite whisker, obtains a kind of with high durable, high glaze, high chemical stability
Composite reinforcing material.In composite material, wollastonite has good fiber structure, higher draw ratio and corrosion resistance, can improve
Polyacrylic stretch-proof and mechanical strengths, the titanium dioxide after surface modification such as counter-bending are capable of providing good heat-resisting, weatherability
With high reducing power, high-purity ultra-fine native sulfate of barium crystal form is fine and close, and chemical stability is splendid, and it is good to can be improved polypropylene
Surface gloss and processing fluidity.
Further, the odium stearate additive amount of above-mentioned steps (1) is the 2 ‰ -5 ‰ of wollastonite in powder quality, to improve slurry
The dispersibility and grindability of material.
Further, the odium stearate additive amount of above-mentioned steps (2) is the 3-5% of barium sulfate and titanium dioxide quality sum,
To improve the dispersibility and grindability of slurry.
Further, the silane coupling agent of above-mentioned steps (2) is the 2-4 ‰ of barium sulfate and titanium dioxide quality sum, with reality
Now to the silicone covering of barium sulfate and titanium dioxide surface.
Further, the silane coupling agent of above-mentioned steps (2) is the 1- of wollastonite, barium sulfate and titanium dioxide quality sum
2 ‰, to realize the cladding to composite material surface.
Further, the mill speed of above-mentioned Wet vertical grinder is 200-250r/min.
Further, above-mentioned titanium dioxide is rutile type titanium white.Divided titanium dioxide is rutile-type and anatase titanium dioxide, rutile
The refractive index of type is 2.76, and anatase titanium dioxide is 2.55, and the glossiness prepared using rutile-type is higher, while rutile-type is resistance to
Time property and chemical-resistant stability are more preferable, and the use environment being adapted to is more extensive.
A kind of product of the preparation method of polypropylene modification composite material, which is characterized in that on the surface of wollastonite
Has a compound coating layer that titanium dioxide and barium sulfate are formed, the surface of the titanium dioxide and barium sulfate is provided with silicone covering
Layer.
Further, the clad ratio of the compound coating layer of above-mentioned wollastonite is 98-100%, the titanium dioxide and barium sulfate
Silicone covering layer clad ratio be 98-100%.Use organosilicon clad can with greatest benefit by three kinds of fillers it
Between compatibility improve, and clad ratio is higher, and compatible effect can be better, also just more can withdraw deposit and play each particle most
Big effect.
Further, the draw ratio of above-mentioned wollastonite is (15-20): 1.The length of wollastonite is through may be implemented than bigger
Steric hindrance space between two particles can be bigger, that is, can compound coating layer that preferably titanium dioxide powder and barium sulfate are formed
It is preferably coated on the surface of wollastonite, forms the covered effect of continuous uniform.
The invention has the following beneficial technical effects:
The present invention is combined wollastonite, titanium dioxide and barium sulfate by mechanochemical method, makes titanium white
Powder and barium sulfate is evenly distributed on wollastonite whisker, obtains a kind of answering with high durable, high glaze, high chemical stability
Close reinforcing material；The refractive index of single barium sulfate is 1.67, and the refractive index of single wollastonite is 1.63, the refraction of this product
Rate is more than or equal to 2, and glossiness much improves；This product select barium sulfate, wollastonite can acid and alkali-resistance, and wollastonite have
There are good fiber structure, higher draw ratio and corrosion resistance, polyacrylic stretch-proof and the mechanical strengths such as counter-bending can be improved,
Titanium dioxide after surface modification is capable of providing good heat-resisting, weatherability and high reducing power, high-purity ultra-fine barium sulfate crystal form
Densification, chemical stability is splendid, can be improved the good surface gloss of polypropylene and processing fluidity, is filled using this product
Modified polypropene, heat resisting temperature can be improved 20-30 DEG C, test, make in the thermo-oxidative ageing of 120 DEG C, 1000 minutes is tested
Product color is consistent with batten prepared by pure titanium dioxide, the variation of no color.
[Detailed description of the invention]
Fig. 1 is step flow chart of the invention.
[specific embodiment]
Below in conjunction with specific embodiment, the present invention is described further.
Embodiment provided below is not intended to limit the invention covered range, and described step is also not use
Sequence is executed to limit its.Those skilled in the art combine existing common knowledge to do conspicuous improvement to the present invention, also fall
Enter the present invention claims protection scope within.
Embodiment one
A kind of preparation method of polypropylene modification composite material, which comprises the following steps:
(1) wollastonite in powder of 400-600 mesh is tuned into the slurry of mass concentration 50%-60% with water, while with slurry
Odium stearate is added as dispersing agent, additive amount is the 2 ‰ of wollastonite dry powder quality, to improve the dispersibility of slurry and can grind
Property.
It (2) is in mass ratio that 4:1 water is matched by the rutile type titanium white of the barium sulfate of 400-600 mesh and 300-400 mesh
At the composite mortar of 65% mass concentration, while 2 ‰ D-7080 silane is added as dispersing agent in the odium stearate of addition 3%
Coupling agent is as dispersing agent and coating material.
(3) titanium dioxide prepared in (2)-barium sulfate composite mortar is fed into Wet vertical agitator mill by diaphragm pump
In, mill speed 200r/min, control 2 μm of contents below of slurry are higher than 95%.Ultra tiny barium sulfate and rutile type titanium
Lattice constantly ruptures white powder during the grinding process, and surface can constantly increase, and mutually adsorbs between particle, in the effect of silane coupling agent
The lower common cladding of completion, forms titanium dioxide-barium sulfate composite granule, and it is stand-by that composite mortar is fed stirring storage in slurry can.
(4) the wollastonite slurry prepared in (2) is fed in Wet vertical grinder by diaphragm pump, mill speed
200r/min, adjusts the revolving speed of diaphragm pump, control wollastonite particles partial size, will prepare in (3) while wollastonite is ground
Titanium dioxide-barium sulfate composite mortar is fed in vertical mixing mill by with wollastonite mass ratio for the amount of 10:1 together, while being added again
1 ‰ D-7080 silane coupling agent is added to carry out further organic coating, to obtain final composite material sizing agent.
(5) composite mortar obtained in (4) is fed into flash dryer by diaphragm pump, the control of hot wind inlet temperature exists
380 DEG C, obtain composite material dry powder；
(6) by composite material dry powder that (5) obtain after beater breaks up depolymerization again through cyclone classified processing, will reunite not
Conforming particle returns to depolymerization in depolymerizer, and conforming particle enters packaging system.
It is a kind of according to product obtained by the above method, have titanium dioxide on the surface of wollastonite and answered with what barium sulfate was formed
The surface of conjunction clad, the titanium dioxide and barium sulfate is provided with silicone covering layer；The compound coating layer of above-mentioned wollastonite
Clad ratio is 98-100%, and the clad ratio of the silicone covering layer of the titanium dioxide and barium sulfate is 98-100%；Above-mentioned silicon ash
The draw ratio of stone is (15-20): 1.The refractive index of the product is 2.12, and glossiness much improves；Changed using this product filling
Property polypropylene, heat resisting temperature can be improved 20-30 DEG C, test in 120 DEG C, thermo-oxidative ageing experiment in 1000 minutes, product
Color is consistent with batten prepared by pure titanium dioxide, the variation of no color.
The coherent detection of product, which added, to be as follows:
Embodiment two
A kind of preparation method of polypropylene modification composite material, which comprises the following steps:
(3) wollastonite in powder of 400-600 mesh is tuned into the slurry of mass concentration 50%-60% with water, while with slurry
Odium stearate is added as dispersing agent, additive amount is the 3 ‰ of wollastonite dry powder quality, to improve the dispersibility of slurry and can grind
Property.
It (4) is in mass ratio that 5:1 water is matched by the rutile type titanium white of the barium sulfate of 400-600 mesh and 300-400 mesh
At the composite mortar of 68% mass concentration, while 2 ‰ D-7080 silane is added as dispersing agent in the odium stearate of addition 3%
Coupling agent is as dispersing agent and coating material.
(3) titanium dioxide prepared in (2)-barium sulfate composite mortar is fed into Wet vertical agitator mill by diaphragm pump
In, mill speed 200r/min, control 2 μm of contents below of slurry are higher than 95%.Ultra tiny barium sulfate and rutile type titanium
Lattice constantly ruptures white powder during the grinding process, and surface can constantly increase, and mutually adsorbs between particle, in the effect of silane coupling agent
The lower common cladding of completion, forms titanium dioxide-barium sulfate composite granule, and it is stand-by that composite mortar is fed stirring storage in slurry can.
(4) the wollastonite slurry prepared in (2) is fed in Wet vertical grinder by diaphragm pump, mill speed
200r/min, adjusts the revolving speed of diaphragm pump, control wollastonite particles partial size, will prepare in (3) while wollastonite is ground
Titanium dioxide-barium sulfate composite mortar is fed in vertical mixing mill by with wollastonite mass ratio for the amount of 11:1 together, while being added again
1.5 ‰ D-7080 silane coupling agent is added to carry out further organic coating, to obtain final composite material sizing agent.
(5) composite mortar obtained in (4) is fed into flash dryer by diaphragm pump, the control of hot wind inlet temperature exists
370 DEG C, obtain composite material dry powder；
(6) by composite material dry powder that (5) obtain after beater breaks up depolymerization again through cyclone classified processing, will reunite not
Conforming particle returns to depolymerization in depolymerizer, and conforming particle enters packaging system.
It is a kind of according to product obtained by the above method, have titanium dioxide on the surface of wollastonite and answered with what barium sulfate was formed
The surface of conjunction clad, the titanium dioxide and barium sulfate is provided with silicone covering layer；The compound coating layer of above-mentioned wollastonite
Clad ratio is 98-100%, and the clad ratio of the silicone covering layer of the titanium dioxide and barium sulfate is 98-100%；Above-mentioned silicon ash
The draw ratio of stone is (15-20): 1.The refractive index of the product is 2.11, and glossiness much improves；Changed using this product filling
Property polypropylene, heat resisting temperature can be improved 20-30 DEG C, test in 120 DEG C, thermo-oxidative ageing experiment in 1000 minutes, product
Color is consistent with batten prepared by pure titanium dioxide, the variation of no color.The coherent detection of product, which added, to be as follows:
| Detection project | Testing result |
| CaSiO in wollastonite3Content % | 92.4 |
| TiO in titanium dioxide2Content % | 94.5 |
| BaSO in native sulfate of barium4Content % | 97.2 |
| Wollastonite draw ratio | 19:1 |
| Wollastonite D50μm | 3.7 |
| Coupling agent clad ratio % | 98.3 |
| Barium sulfate coats titanium dioxide clad ratio % | 98.1 |
| Titanium dioxide and barium sulfate coat wollastonite clad ratio % | 98.7 |
Embodiment three
A kind of preparation method of polypropylene modification composite material, which comprises the following steps:
(5) wollastonite in powder of 400-600 mesh is tuned into the slurry of mass concentration 50%-60% with water, while with slurry
Odium stearate is added as dispersing agent, additive amount is the 5 ‰ of wollastonite dry powder quality, to improve the dispersibility of slurry and can grind
Property.
It (6) is in mass ratio that 6:1 water is matched by the rutile type titanium white of the barium sulfate of 400-600 mesh and 300-400 mesh
At the composite mortar of 70% mass concentration, while 2 ‰ D-7080 silane is added as dispersing agent in the odium stearate of addition 3%
Coupling agent is as dispersing agent and coating material.
(3) titanium dioxide prepared in (2)-barium sulfate composite mortar is fed into Wet vertical agitator mill by diaphragm pump
In, mill speed 250r/min, control 2 μm of contents below of slurry are higher than 98%.Ultra tiny barium sulfate and rutile type titanium
Lattice constantly ruptures white powder during the grinding process, and surface can constantly increase, and mutually adsorbs between particle, in the effect of silane coupling agent
The lower common cladding of completion, forms titanium dioxide-barium sulfate composite granule, and it is stand-by that composite mortar is fed stirring storage in slurry can.
(4) the wollastonite slurry prepared in (2) is fed in Wet vertical grinder by diaphragm pump, mill speed
250r/min, adjusts the revolving speed of diaphragm pump, control wollastonite particles partial size, will prepare in (3) while wollastonite is ground
Titanium dioxide-barium sulfate composite mortar is fed in vertical mixing mill by with wollastonite mass ratio for the amount of 12:1 together, while being added again
2 ‰ D-7080 silane coupling agent is added to carry out further organic coating, to obtain final composite material sizing agent.
(5) composite mortar obtained in (4) is fed into flash dryer by diaphragm pump, the control of hot wind inlet temperature exists
390 DEG C, obtain composite material dry powder；
(6) by composite material dry powder that (5) obtain after beater breaks up depolymerization again through cyclone classified processing, will reunite
Unqualified particle returns to depolymerization in depolymerizer, and conforming particle enters packaging system.
It is a kind of according to product obtained by the above method, have titanium dioxide on the surface of wollastonite and answered with what barium sulfate was formed
The surface of conjunction clad, the titanium dioxide and barium sulfate is provided with silicone covering layer；The compound coating layer of above-mentioned wollastonite
Clad ratio is 98-100%, and the clad ratio of the silicone covering layer of the titanium dioxide and barium sulfate is 98-100%；Above-mentioned silicon ash
The draw ratio of stone is (15-20): 1.The refractive index of the product is 2.13, and glossiness much improves；Changed using this product filling
Property polypropylene, heat resisting temperature can be improved 20-30 DEG C, test in 120 DEG C, thermo-oxidative ageing experiment in 1000 minutes, product
Color is consistent with batten prepared by pure titanium dioxide, the variation of no color.The coherent detection of product, which added, to be as follows:
| Detection project | Testing result |
| CaSiO in wollastonite3Content % | 92.4 |
| TiO in titanium dioxide2Content % | 94.5 |
| BaSO in native sulfate of barium4Content % | 97.2 |
| Wollastonite draw ratio | 19:1 |
| Wollastonite D50μm | 3.0 |
| Coupling agent clad ratio % | 98.8 |
| Barium sulfate coats titanium dioxide clad ratio % | 98.5 |
| Titanium dioxide and barium sulfate coat wollastonite clad ratio % | 99.2 |
Claims (10)
1. a kind of preparation method of polypropylene modification composite material, which comprises the following steps:
(1) wollastonite in powder of 400-600 mesh is tuned into the slurry of mass concentration 50%-60% with water, odium stearate conduct is added
Dispersing agent；
(2) be in mass ratio by the titanium dioxide of the barium sulfate of 400-600 mesh and 300-400 mesh (4-6): 1 with water to be made into quality dense
The composite mortar of 65-70% is spent, odium stearate and silane coupling agent is added as dispersing agent and coating material；
(3) titanium dioxide prepared in (2)-barium sulfate composite mortar is fed into Wet vertical grinder wet grinding to 3000
~4000 mesh；
(4) the wollastonite slurry prepared in (1) is fed in Wet vertical grinder, the titanium dioxide-that will be prepared in (3) is added
The mass ratio of barium sulfate composite mortar, titanium dioxide-barium sulfate and wollastonite is (10-12): 1, then add silane coupling agent progress
Cladding, the average grain diameter D of wet grinding to wollastonite particles50It is 2.0-2.5 μm；
(5) composite mortar obtained in (4) is fed into flash dryer, hot wind inlet temperature is controlled at 370-390 DEG C, answered
Condensation material dry powder；
(6) the composite material dry powder that (5) obtain is broken up into depolymerization, then through cyclone classified processing, collects the powder of 2500-3000 mesh
Obtain composite products.
2. the preparation method of polypropylene modification composite material according to claim 1, which is characterized in that the step
(1) odium stearate additive amount is the 2 ‰ -5 ‰ of wollastonite in powder quality.
3. the preparation method of polypropylene modification composite material according to claim 1, which is characterized in that the step
(2) odium stearate additive amount is the 3-5% of barium sulfate and titanium dioxide quality sum.
4. the preparation method of polypropylene modification composite material according to claim 1, which is characterized in that the step
(2) silane coupling agent is the 2-4 ‰ of barium sulfate and titanium dioxide quality sum.
5. the preparation method of polypropylene modification composite material according to claim 1, which is characterized in that the step
(2) silane coupling agent is the 1-2 ‰ of wollastonite, barium sulfate and titanium dioxide quality sum.
6. the preparation method of polypropylene modification composite material according to claim 1, which is characterized in that the wet process is vertical
The mill speed of formula grinder is 200-250r/min.
7. the preparation method of polypropylene modification composite material according to claim 1, which is characterized in that the titanium dioxide
For rutile type titanium white.
8. a kind of product of such as preparation method of the described in any item polypropylene modification composite materials of claim 1-7, special
Sign is have the compound coating layer that titanium dioxide and barium sulfate are formed, the titanium dioxide and barium sulfate on the surface of wollastonite
Surface be provided with silicone covering layer.
9. the product of the preparation method of polypropylene modification composite material according to claim 8, which is characterized in that described
The clad ratio of the compound coating layer of wollastonite is 98-100%, the clad ratio of the silicone covering layer of the titanium dioxide and barium sulfate
For 98-100%.
10. the product of the preparation method of polypropylene modification composite material according to claim 8, which is characterized in that institute
The draw ratio for stating wollastonite is (15-20): 1.
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| CN113174106A (en) * | 2020-12-14 | 2021-07-27 | 浙江金华威达日化包装实业有限公司 | PP material with high shading rate and high toughness and preparation method thereof |
| CN114539812A (en) * | 2022-03-02 | 2022-05-27 | 江西广源新材料有限公司 | Inorganic powder, preparation method thereof and reinforced and toughened polypropylene modified master batch |
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