CN108623920A - A kind of bumper polypropylene alloy and preparation method thereof for exempting from spraying pearl effect - Google Patents
A kind of bumper polypropylene alloy and preparation method thereof for exempting from spraying pearl effect Download PDFInfo
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- CN108623920A CN108623920A CN201710186019.3A CN201710186019A CN108623920A CN 108623920 A CN108623920 A CN 108623920A CN 201710186019 A CN201710186019 A CN 201710186019A CN 108623920 A CN108623920 A CN 108623920A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/14—Copolymers of propene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/9258—Velocity
- B29C2948/9259—Angular velocity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
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- 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
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- 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
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- 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
- C08L2207/06—Properties of polyethylene
- C08L2207/066—LDPE (radical process)
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a kind of bumper polypropylene alloys and preparation method thereof for exempting from spraying pearl effect, are made of the component of following parts by weight:48 72 parts of polypropylene, 8 12 parts of polyethylene, 15 30 parts of inorganic filler, 5 10 parts of toughener, 0.2 0.8 parts of antioxidant, 0.2 0.5 parts of the steady agent of light, 0.1 0.5 parts of pearl powder, 0.2 0.5 parts of coupling agent, 0.2 1.0 parts of color toner etc. are made through mixing, extruding pelletization, and the modified pearlite powder is the pearl powder that surface coats one layer of fatty acid amide hydride.Polypropylene alloy cooperation bloom mirror surface mould prepared by the present invention can be obtained good high glaze and pearl effect appearance without spraying directly injection molding, cost is greatly saved compared with lacquer spraying technique, at the same avoid the depainting problem during product use and caused by scrap.
Description
Technical field
The present invention relates to a kind of modified material technical fields, and in particular to a kind of bumper is with exempting to spray the poly- of pearl effect
Propylene alloy and preparation method thereof.
Background technology
In recent years, auto industry rapidly develops, and the especially yield of car and social ownership is always maintained at higher increasing
Speed, automotive plastic play irreplaceable effect, while new auto technology in satisfaction beauty, safety, lightweight etc.
Just develop towards more environmentally friendly, safer, more comfortable and personalized direction.In automotive plastic kind, modified polypropylene material
The maximum kind of dosage in automotive plastic material is had become, while being also the focus of automotive plastic development and application.Poly- third
Alkene material source is extensive, density is small, corrosion-resistant, counter-bending fatigue strength is good, has good electrical property and insulation performance, processing
It has excellent performance, it is cheap, there is the characteristic of many engineering plastics by modified polypropylene material, show excellent power
Performance, heat resistance etc. are learned, comprehensive performance is very excellent.
Currently, automobile exterior trimming parts not only need mostly based on spray painting, therefore for the polypropylene material for automobile exterior trimming parts
Excellent mechanical property is wanted, and also needs to that there is good paint adhesion energy.But since polypropylene material belongs to nonpolarity,
And it is polarity to paint, both polypropylene and paint poor compatibility.Therefore, it before polypropylene is painted, needs by a series of
Complicated surface modification treatment, to enhance the adhesive force of its face coat.Process procedure involved by the surface modification treatment is more,
Technology controlling and process is difficult;Meanwhile the volatilization of priming paint solvent can lead to environmental pollution, and production cost is high, product fraction defective is high and recycling is tired
It is difficult.Therefore, need to find it is a kind of it is alternative exempt from sprayed on material just and become the development trend of future automobile exterior trimming parts, more especially
Thin-walled, complicated, appearance and the more demanding full-sized car exterior trimming parts of color, it is even more very urgent.
With the raising of quality of the life, increasingly raising that consumer requires product appearance, it is desirable that ensureing material materialization
Under the premise of performance meets application requirement, there is the requirement of change to appearance.To rich colors caused by conventional spray paint technique
Effect gives expression to unprecedented favor, including pearl effect, metal-like, flicker effect etc..However traditional spraying process
There is certain defect such as to be polluted to environment and energy waste, therefore starts to occur adding into resin in certain fields
Metal powder pigment, pearlescent pigment etc. have particular color effect pigment to obtain appearance similar with spraying process.
Chinese patent literature CN 201010227777.3 discloses a kind of high-gloss polypropylene material and preparation method thereof,
The high-gloss polypropylene material selects ZrO2 as metal packing, although glossiness, article surface point can be solved,
But additive amount realizes this effect for 30-60 parts;Patent CN 201410135178.7 discloses one kind and exempting from spraying aesthetic effect
Polypropene composition and the preparation method and application thereof select metal powder or pearl powder to reach metal or pearl as effect pigment
The effect of light, but additive amount wants 1-6% that can just have preferable application;Patent 201410788352.8 discloses one kind and exempts to spray
Baking vanish imitates metallocene polypropylene material and preparation method thereof, and the additive amount of composite metal powder is 23-27%.And current metal on the market
Powder or pearl powder higher price, so high additive amount will certainly cause the increase of cost to use and promote to influence it, because
This, the metal or pearl effect for needing to develop a kind of low cost exempt from spray coating polypropylene alloy material.
Invention content
The object of the present invention is to provide a kind of bumper polypropylene alloys and preparation method thereof for exempting from spraying pearl effect.
Technical scheme is as follows:
A kind of bumper polypropylene alloy for exempting from spraying pearl effect, is prepared by weight by following components:
The modified pearlite powder is the pearl powder that surface coats one layer of fatty acid amide hydride.
Further scheme, the acrylic resin are at least one of highly crystalline copolymer polypropylene, homopolypropylene;It is described
Polyethylene is one or both of low density polyethylene (LDPE) or linear low density polyethylene.
The inorganic filler is wollastonite, talcum powder, calcium carbonate, calcium carbonate crystal whisker, kaolin, montmorillonite, barite, cloud
At least one of mother, titanium dioxide, flyash.
The toughener is at least one of ethylene-octene copolymer, ethylene-propylene copolymer.
The grain size of the modified pearlite powder is 80-300 mesh;The color toner be blue, green or yellow phthalein blueness class,
Anthraquinones pigments or dyes.
The coupling agent is silane coupling agent;
The antioxidant be four [β-(3,5- di-t-butyl 4- hydroxy phenyls) propionic acid] pentaerythritol esters (antioxidant 1010),
β-(3,5- di-tert-butyl-hydroxy phenyl) propionic acid n-octadecyl alcohol ester (antioxidant 1076), three-(2,4- di-tert-butyl-phenyls)
At least one of double octadecyls (antioxidant DSTDP) of phosphite ester (irgasfos 168), thio-2 acid;
The steady agent of light is 2- (2- hydroxyl -5- t-octyls phenyl) benzotriazole (UV-329), 2- hydroxyl -4- n-octyloxies
Benzophenone (UV531), triacetonamine or poly- [[6- [(1,1,3,3- tetramethyl butyls) amine] -1,3,5- triazine -2,4- diyls]
Two dihexyls [(2,2,6,6- tetramethyl -4- piperidines) imines] of [(2,2,6,6- tetramethyl -4- piperidines) imines] -1,6-] (TH-
944)。
Fat acid acylamino hydrogen compound is known product in the present invention, can commercially, and manufacturer is KM chemical industry.Add
Entering color toner makes polypropylene alloy not only have metal or pearl effect, can also there is different colors.
Another goal of the invention of the present invention is to provide a kind of above-mentioned bumper and is closed with the polypropylene for exempting to spray pearl effect
The preparation method of gold,
(1) lubricant fatty acid amide hydride first is diluted with absolute ethyl alcohol, adds pearl powder and stir evenly, then leads to
Strength high speed dispersor is crossed, so that pearl powder surface is coated one layer of fatty acid amide hydride, modified pearlite powder is obtained, wherein anhydrous second
The mass ratio of alcohol, fat acid acylamino hydrogen compound and pearl powder is 100:2.5-10:25-50;
(2) by 48-72 parts of polypropylene, 8-12 parts of polyethylene, 15-30 parts of inorganic filler, 5-10 parts of toughener, antioxidant
0.2-0.8 parts, light is agent 0.2-0.5 parts steady, 0.1-0.5 parts of modified pearlite powder, 0.2-0.5 parts of coupling agent and color toner 0.2-
1.0 parts are added high mixer and carry out mixing 5-15min;Then uniformly mixed material is added twin-screw extrude through being kneaded,
It squeezes out, obtains the bumper polypropylene alloy for exempting from spraying pearl effect;Squeezing for section is wherein respectively squeezed out in double screw extruder
It is 150-170 DEG C, 170-185 DEG C, 175-185 DEG C, 175-185 DEG C, 175-185 DEG C, 180-190 DEG C, 180- to go out temperature respectively
195℃、180-195℃、180-195℃、185-200℃。
Polypropylene alloy cooperation bloom mirror surface mould prepared by the present invention can be obtained good without spraying directly injection molding
The pearl effect appearance of high glaze, is greatly saved cost compared with lacquer spraying technique, while during avoiding product use
Depainting problem and caused by scrap.
The pearl powder that the present invention selects passes through surface modification treatment, and can reach preferable pearly-lustre with lower dosage imitates
Fruit is truly realized low cost and exempts to spray pearl effect.
Specific implementation mode
Inorganic filler used in following embodiment is wollastonite, talcum powder, calcium carbonate, calcium carbonate crystal whisker, kaolinite
At least one of soil, montmorillonite, barite, mica, titanium dioxide, flyash.
The toughener is at least one of ethylene-octene copolymer, ethylene-propylene copolymer.
Coupling agent selects Silane coupling agent KH550
The color toner is blue, phthalein blueness class, the Anthraquinones pigments or dyes of green or yellow.
The modified pearlite powder is first to dilute lubricant fatty acid amide hydride with absolute ethyl alcohol, adds pearl powder and stirs
It mixes uniformly, then by strength high speed dispersor, so that pearl powder surface is coated one layer of fatty acid amide hydride, obtaining grain size is
80-300 mesh modified pearlite powder, the wherein mass ratio of absolute ethyl alcohol, fat acid acylamino hydrogen compound and pearl powder are 100:2.5-10:
25-50。
Embodiment 1
First raw material is weighed by component in table 1 and proportioning (parts by weight);
Then high-speed mixer and mixing 5min is added in above-mentioned raw material, mixed blend is passed through into double screw extruder
Extruding pelletization, each area's temperature of extruder be followed successively by from feeding section to head temperature 150 DEG C, 170 DEG C, 175 DEG C, 175 DEG C, 175
DEG C, 180 DEG C, 180 DEG C, 180 DEG C, 180 DEG C, 185 DEG C, extrusion screw rod draw ratio be 40, extrusion screw rod rotating speed be 350 revs/min.
The mixture being prepared is tested for the property, test result is shown in Table 2.
Embodiment 2
First raw material is weighed by component in table 1 and proportioning (parts by weight);
Then high-speed mixer and mixing 10min is added in above-mentioned raw material, mixed blend is passed through into twin-screw extrusion
Machine extruding pelletization, each area's temperature of extruder be followed successively by from feeding section to head temperature 170 DEG C, 185 DEG C, 185 DEG C, 185 DEG C,
185 DEG C, 190 DEG C, 195 DEG C, 195 DEG C, 195 DEG C, 200 DEG C, extrusion screw rod draw ratio is 36, and extrusion screw rod rotating speed is 350 revs/min
Clock.The mixture being prepared is tested for the property, test result is shown in Table 2.
Embodiment 3
First raw material is weighed by component in table 1 and proportioning (parts by weight);
Then high-speed mixer and mixing 15min is added in above-mentioned raw material, mixed blend is passed through into twin-screw extrusion
Machine extruding pelletization, each area's temperature of extruder be followed successively by from feeding section to head temperature 150 DEG C, 170 DEG C, 175 DEG C, 175 DEG C,
175 DEG C, 180 DEG C, 180 DEG C, 180 DEG C, 180 DEG C, 195 DEG C, extrusion screw rod draw ratio is 40, and extrusion screw rod rotating speed is 350 revs/min
Clock.The mixture being prepared is tested for the property, test result is shown in Table 2.
Embodiment 4
First raw material is weighed by component in table 1 and proportioning (parts by weight);
Then high-speed mixer and mixing 15min is added in above-mentioned raw material, mixed blend is passed through into twin-screw extrusion
Machine extruding pelletization, each area's temperature of extruder be followed successively by from feeding section to head temperature 160 DEG C, 175 DEG C, 175 DEG C, 180 DEG C,
185 DEG C, 185 DEG C, 185 DEG C, 185 DEG C, 190 DEG C, 195 DEG C, extrusion screw rod draw ratio is 44, and extrusion screw rod rotating speed is 300 revs/min
Clock.The mixture being prepared is tested for the property, test result is shown in Table 2.
Embodiment 5
First raw material is weighed by component in table 1 and proportioning (parts by weight);
Then high-speed mixer and mixing 15min is added in above-mentioned raw material, mixed blend is passed through into twin-screw extrusion
Machine extruding pelletization, each area's temperature of extruder be followed successively by from feeding section to head temperature 160 DEG C, 175 DEG C, 180 DEG C, 180 DEG C,
185 DEG C, 185 DEG C, 185 DEG C, 185 DEG C, 185 DEG C, 190 DEG C, extrusion screw rod draw ratio is 36, and extrusion screw rod rotating speed is 400 revs/min
Clock.The mixture being prepared is tested for the property, test result is shown in Table 2.
Embodiment 6
First raw material is weighed by component in table 1 and proportioning (parts by weight);
Then high-speed mixer and mixing 15min is added in above-mentioned raw material, mixed blend is passed through into twin-screw extrusion
Machine extruding pelletization, each area's temperature of extruder be followed successively by from feeding section to head temperature 160 DEG C, 170 DEG C, 175 DEG C, 175 DEG C,
185 DEG C, 185 DEG C, 185 DEG C, 185 DEG C, 185 DEG C, 190 DEG C, extrusion screw rod draw ratio is 40, and extrusion screw rod rotating speed is 400 revs/min
Clock.The mixture being prepared is tested for the property, test result is shown in Table 2.
Table 1
Table 2
Wherein, pearl effect evaluation method is:Polypropylene material prepared by embodiment 1-6 is directly noted with high gloss mold
Modeling, the pearly-lustre flicker effect of evaluation injection molding model.Specifically evaluation method is:5 tester's tests are chosen, with a certain assessment etc.
Grade person in the majority is the attribute ratings of the model performance.Pearly-lustre flicker effect is divided into three grades:Obviously, generally, nothing.
From table 2 it can be seen that PP alloys prepared by 1-6 of the embodiment of the present invention have preferable comprehensive performance, comply fully with
Performance requirement of the bumper to material;Coordinate bloom mold injection molding, product that there is apparent pearl effect, Ke Yizuo simultaneously
Bumper material to exempt to spray pearl effect uses.
This hair can be understood and applied the above description of the embodiments is intended to facilitate those skilled in the art
It is bright.Person skilled in the art obviously easily can make various modifications to these embodiments, and described herein
General Principle is applied in other embodiment without having to go through creative labor.Therefore, the present invention is not limited to implementations here
Example, those skilled in the art's announcement according to the present invention, improvement and modification made without departing from the scope of the present invention all should be
Within protection scope of the present invention.
Claims (9)
1. a kind of bumper polypropylene alloy for exempting from spraying pearl effect, it is characterised in that:It is made by weight by following components
It is standby to form:
48-72 parts of polypropylene,
8-12 parts of polyethylene,
15-30 parts of inorganic filler,
5-10 parts of toughener,
0.2-0.8 parts of antioxidant,
Steady agent 0.2-0.5 parts of light,
0.1-0.5 parts of modified pearlite powder,
0.2-0.5 parts of coupling agent,
0.2-1 parts of color toner,
The modified pearlite powder is the pearl powder that surface coats one layer of fatty acid amide hydride.
2. according to a kind of polypropylene alloy for exempting from spraying pearl effect of bumper described in claim 1, it is characterised in that:
The acrylic resin is at least one of highly crystalline copolymer polypropylene, homopolypropylene;The polyethylene is low density polyethylene
One or both of alkene or linear low density polyethylene.
3. according to a kind of polypropylene alloy for exempting from spraying pearl effect of bumper described in claim 1, it is characterised in that:
The inorganic filler is wollastonite, talcum powder, calcium carbonate, calcium carbonate crystal whisker, kaolin, montmorillonite, barite, mica, titanium white
At least one of powder, flyash.
4. according to a kind of polypropylene alloy for exempting from spraying pearl effect of bumper described in claim 1, it is characterised in that:
The toughener is at least one of ethylene-octene copolymer, ethylene-propylene copolymer.
5. according to a kind of polypropylene alloy for exempting from spraying pearl effect of bumper described in claim 1, it is characterised in that:
The grain size of the modified pearlite powder is 80-300 mesh;The color toner is blue, phthalein blueness class, the Anthraquinones face of green or yellow
Material or dyestuff.
6. a kind of bumper polypropylene alloy for exempting from spraying pearl effect according to claim 1, it is characterised in that:Institute
It is silane coupling agent to state coupling agent.
7. a kind of bumper polypropylene alloy for exempting from spraying pearl effect according to claim 1, it is characterised in that:Institute
It is four [β-(3,5- di-t-butyl 4- hydroxy phenyls) propionic acid] pentaerythritol esters, β-(3,5- di-t-butyls-to state antioxidant
4- hydroxy phenyls) propionic acid n-octadecyl alcohol ester, three-(2,4- di-tert-butyl-phenyl) phosphite esters, thio-2 acid double ten
At least one of eight alcohol esters.
8. a kind of bumper polypropylene alloy for exempting from spraying pearl effect according to claim 1, it is characterised in that:Institute
It is 2- (2- hydroxyl -5- t-octyls phenyl) benzotriazole, 2-hydroxy-4-n-octoxybenzophenone to state the steady agent of light
(UV531), triacetonamine or it is poly- [[6- [(1,1,3,3- tetramethyl butyls) amine] -1,3,5- triazine -2,4- diyls] [(2,2,6,
6- tetramethyl -4- piperidines) imines] two dihexyls [(2,2,6,6- tetramethyl -4- piperidines) imines] of -1,6-].
9. a kind of preparation method of bumper polypropylene alloy for exempting to spray pearl effect as described in claim 1, special
Sign is:
(1)Lubricant fatty acid amide hydride first is diluted with absolute ethyl alcohol, pearl powder is added and stirs evenly, then by strong
Power high speed dispersor makes pearl powder surface coat one layer of fatty acid amide hydride, obtains modified pearlite powder, wherein absolute ethyl alcohol,
The mass ratio of fat acid acylamino hydrogen compound and pearl powder is 100:2.5-10:25-50;
(2)By 48-72 parts of polypropylene, 8-12 parts of polyethylene, 15-30 parts of inorganic filler, 5-10 parts of toughener, antioxidant 0.2-
0.8 part, light is agent 0.2-0.5 parts steady, 0.1-0.5 parts of modified pearlite powder, 0.2-0.5 parts of coupling agent and 0.2-1.0 parts of color toner
High mixer is added and carries out mixing 5-15min;Then uniformly mixed material is added twin-screw extrude through being kneaded, squeezing out,
Obtain the bumper polypropylene alloy for exempting from spraying pearl effect;The extrusion temperature in section is wherein respectively squeezed out in double screw extruder
150-170 DEG C respectively, 170-185 DEG C, 175-185 DEG C, 175-185 DEG C, 175-185 DEG C, 180-190 DEG C, 180-195 DEG C,
180-195℃、180-195℃、185-200℃。
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CN109679209A (en) * | 2018-12-25 | 2019-04-26 | 重庆科聚孚工程塑料有限责任公司 | PP composite material with metal texture and preparation method thereof |
CN110157095A (en) * | 2019-05-09 | 2019-08-23 | 广东圆融新材料有限公司 | Exempt to spray fade effect modified polypropylene material and preparation method thereof |
CN111533988A (en) * | 2019-12-23 | 2020-08-14 | 会通新材料股份有限公司 | Good-appearance short-program-control oriented metallic silver polypropylene composite material and preparation method thereof |
CN114149635A (en) * | 2021-11-30 | 2022-03-08 | 上海金发科技发展有限公司 | Spray-free infrared-transmitting polypropylene composition and preparation method and application thereof |
CN114685893A (en) * | 2022-03-31 | 2022-07-01 | 金发科技股份有限公司 | Low-density and good-mechanical-property spray-free polypropylene composition and preparation method and application thereof |
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CN109679209A (en) * | 2018-12-25 | 2019-04-26 | 重庆科聚孚工程塑料有限责任公司 | PP composite material with metal texture and preparation method thereof |
CN110157095A (en) * | 2019-05-09 | 2019-08-23 | 广东圆融新材料有限公司 | Exempt to spray fade effect modified polypropylene material and preparation method thereof |
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