CN109735007A - Light-weighted resistance to scratching, resistance to compression trace PP composite material and preparation method thereof can be achieved in one kind - Google Patents
Light-weighted resistance to scratching, resistance to compression trace PP composite material and preparation method thereof can be achieved in one kind Download PDFInfo
- Publication number
- CN109735007A CN109735007A CN201811610673.3A CN201811610673A CN109735007A CN 109735007 A CN109735007 A CN 109735007A CN 201811610673 A CN201811610673 A CN 201811610673A CN 109735007 A CN109735007 A CN 109735007A
- Authority
- CN
- China
- Prior art keywords
- resistance
- composite material
- scratching
- light
- weighted
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses one kind, and light-weighted resistance to scratching, resistance to compression trace PP composite material and preparation method thereof can be achieved, this PP composite material comprises the following raw materials by weight percent: polypropylene 30~92, toughener 5~15, inorganic filler 0~25, hollow glass micropearl 1~15, barium sulfate crystal whisker 1~10, coupling agent 0~2, antioxidant 0.1~1, other auxiliary agents 0~2.The present invention is by being added glass microballoon and barium sulfate crystal whisker, pass through the compounding of two kinds of different scale different shape systems, while significantly improving the resistance to scratching of PP composite material and pressure mottling resistance energy, realize the light-weighted feature of composite system, gained PP composite material obtains excellent resistance to scratching and pressure mottling resistance energy while guaranteeing material mechanical performance, and can reduce the weight of product, so as to better meet, automobile industry scratching resistance to for automobile interior exterior decorations, pressure mottling resistance can require and lightweight requirements.
Description
Technical field
The present invention relates to one kind, and light-weighted resistance to scratching, resistance to compression trace PP composite material and preparation method thereof can be achieved,
It is a kind of simple process, PP composite material at low cost, good combination property, is mainly used in automobile interior exterior decorations etc., belongs to
Polymer modification and processing technique field.
Background technique
With the rapid development of the automotive industry, safety, comfort, integrated, lightweight become the majority of consumers increasingly
Focus of attention.Polypropylene is while light inexpensive because having preferable processing performance and excellent mechanics, physics, chemical property,
It is widely used in inner and outer decorative parts of automobile, such as instrument board, door-plate, column, seat backplate, bumper, is current growth rate
Most fast universal thermoplastic.
Currently, with the promotion of people's level of consumption, people are also changing for the consumption idea of automobile, to automobile
Higher requirements are also raised for the aesthetics of inside gadget, the feature of environmental protection, in-car air quality etc..Currently, inner and outer decorative parts of automobile
Major part is still using Inorganic Fillers Filled modified polypropene, and in production, transport, assembly and use process, meeting is inevitable
It collides with, rub or squeezes, scratch and impression are generated, to influence the beauty of product.
It is main at present still to be carried out by adding resistance to scratching auxiliary agent about the Marresistance energy for improving PP composite material
Improve.Patent CN101173074A discloses a kind of polypropene composition and preparation method thereof with scratch resistant performance, this is poly-
Propylene compositions improve the coefficient of friction of material surface by the resistance to scratching auxiliary agent of addition small molecule amides, so as to improve material
Marresistance energy, but amide-type aid is readily migrate into material surface during being exposed to the sun, and causes product surface tacky, influences
Using effect.Chinese patent 200810023328.X discloses a kind of scraping-resistant automobile inner fitting special-purpose material and its preparation side
Method improves the Marresistance energy of PP composite material using amides and silicone scratch-resistant additive compound.United States Patent (USP)
US5585420 and US5731376 improves the Marresistance energy of material by the way that the method for high molecular weight siloxane is added.These patents
Although the PP composite material being related to can improve the Marresistance energy of product surface to a certain extent, for product surface
Pressure mottling resistance can be not directed to.
Summary of the invention
The object of the present invention is to provide one kind, and light-weighted resistance to scratching, resistance to compression trace PP composite material and its system can be achieved
Preparation Method, to solve the above problem of the prior art.
In order to improve the Marresistance and pressure mottling resistance of PP composite material, while realizing the lightweight purpose of material,
The technical scheme is that the hollow glass micropearl and sulfuric acid of a part are added in the basic components of PP composite material
Barium whisker, in squeezing out Blending Processes, the system of two kinds of different scale different shapes compounds in a polymer matrix, reaches collaboration
Effect, improves the Marresistance and pressure mottling resistance of PP composite material, realizes weight loss effect, while avoiding tradition and scraping
Wipe the tacky problem of product surface caused by the addition of auxiliary agent.
Light-weighted resistance to scratching, resistance to compression trace PP composite material can be achieved in one kind, by the raw material of following weight percent
It is configured to:
In the PP composite material system that the present invention is applicable in,
For the polypropylene under 230 DEG C, 2.16kg loading condiction, melt flow rate (MFR) is 5~60g/10min.
The polypropylene is homo-polypropylene or block copolymerization propylene；The crystallinity of the homo-polypropylene 70% or more, etc.
Normality is greater than 99%；The comonomer of the block copolymerization polypropylene is ethylene, and vinyl monomer repetitive unit molar content is 4
~10%.
The toughener is the combination of ethylene-octene linear copolymer or Ethylene/Butylene linear copolymer or both,
Density is 0.88~0.90g/cm3, melt flow rate (MFR) is 0.5~10g/10min.
The inorganic filler is one or both of talcum powder, calcium carbonate, mica, wollastonite and montmorillonite or more
Composition.
The hollow glass micropearl main component is borosilicate, and particle size range is 10~250 microns, is accumulated close
Degree is 0.1~1g/cm3。
The barium sulfate crystal whisker is acicular texture, draw ratio 50-80.
The coupling agent is any one in silane coupling agent, titanate coupling agent and aluminate coupling agent.
The antioxidant includes primary antioxidant and auxiliary anti-oxidant, and primary antioxidant is hindered phenol or sulphur ester antioxidant；It is auxiliary
Antioxidant is phosphorite kind antioxidant.
The primary antioxidant is one or more of 3114,1010 and DSTP mixing；Auxiliary anti-oxidant is 618 and 168
One or both of.
Other described additives are various colors additive, light stabilizer, various esters or fatty acid lubricant etc..
Above-mentioned that light-weighted resistance to scratching, the preparation method of resistance to compression trace PP composite material can be achieved, specific steps are such as
Under:
(1) raw material is weighed by above-mentioned weight proportion；
(2) each raw material is placed in super mixer and is mixed 3~5 minutes；
(3) mixed raw material is placed in dual-screw-stem machine, through melting extrusion, is granulated, technique an are as follows: area 190~200
DEG C, two 200~210 DEG C of areas, three 210~220 DEG C of areas, four 205~215 DEG C of areas；The residence time of entire extrusion process is 1~2
Minute, pressure is 12~18MPa, and purging vacuum degree reaches 5~20kPa.
The invention has the advantages that
1, the present invention is using the hollow glass micropearl and barium sulfate crystal whisker of different scale different shape in composite system
Middle compounding avoids traditional scraping so that obtained PP composite material has excellent Marresistance and pressure mottling resistance
The tacky problem of the product surface that auxiliary agent may generate.
2, PP composite material density produced by the present invention is lower, can satisfy the light-weighted requirement of auto parts and components.
3, proposed by the present invention that light-weighted resistance to scratching, the preparation process of resistance to compression trace PP composite material letter can be achieved
List, production cost are low.
Specific embodiment
Below by the mode of embodiment and comparative example, the present invention is described in further detail, does not therefore send out this
It is bright to be limited among the embodiment described range.
Embodiment 1
PP composite material main component of the present invention include 81.6% polypropylene, 5% toughener, 5% inorganic filler,
3% hollow glass micropearl, 2% barium sulfate crystal whisker, 1% coupling agent, 0.1% antioxidant 3114 and 0.2% irgasfos 168,0.1%
The other auxiliary agents of auxiliary anti-oxidant DSTP and 2%.
Embodiment 2
PP composite material main component of the present invention include 76.6% polypropylene, 5% toughener, 8% inorganic filler,
5% hollow glass micropearl, 2% barium sulfate crystal whisker, 1% coupling agent, 0.1% antioxidant 3114 and 0.2% irgasfos 168,0.1%
The other auxiliary agents of auxiliary anti-oxidant DSTP and 2%.
Embodiment 3
PP composite material main component of the present invention includes 76.6% polypropylene, 5% toughener, 10% inorganic filler, 3
It is hollow glass micropearl, 2% barium sulfate crystal whisker, 1% coupling agent, 0.1% antioxidant 3114 and 0.2% irgasfos 168,0.1% auxiliary
The other auxiliary agents of antioxidant DSTP and 2%.
Embodiment 4
PP composite material main component of the present invention includes 68.6% polypropylene, 8% toughener, 10% inorganic filler, 7
It is hollow glass micropearl, 3% barium sulfate crystal whisker, 1% coupling agent, 0.1% antioxidant 3114 and 0.2% irgasfos 168,0.1% auxiliary
The other auxiliary agents of antioxidant DSTP and 2%.
Embodiment 5
PP composite material main component of the present invention includes 68.6% polypropylene, 8% toughener, 12% inorganic filler, 5
It is hollow glass micropearl, 3% barium sulfate crystal whisker, 1% coupling agent, 0.1% antioxidant 3114 and 0.2% irgasfos 168,0.1% auxiliary
The other auxiliary agents of antioxidant DSTP and 2%.
Embodiment 6
PP composite material main component of the present invention include 56.6% polypropylene, 10% toughener, 15% inorganic filler,
10 hollow glass micropearls, 5% barium sulfate crystal whisker, 1% coupling agent, 0.1% antioxidant 3114 and 0.2% irgasfos 168,0.1%
The other auxiliary agents of auxiliary anti-oxidant DSTP and 2%.
Embodiment 7
PP composite material main component of the present invention include 56.6% polypropylene, 10% toughener, 18% inorganic filler,
It is 7 hollow glass micropearls, 5% barium sulfate crystal whisker, 1% coupling agent, 0.1% antioxidant 3114 and 0.2% irgasfos 168,0.1% auxiliary
The other auxiliary agents of antioxidant DSTP and 2%.
Comparative example 1
PP composite material main component of the present invention include 81.6% polypropylene, 5% toughener, 10% inorganic filler,
1% coupling agent, 0.1% antioxidant 3114 and 0.2% irgasfos 168,0.1% auxiliary anti-oxidant DSTP and 2% other auxiliary agents.
Comparative example 2
PP composite material main component of the present invention include 76.6% polypropylene, 5% toughener, 15% inorganic filler,
1% coupling agent, 0.1% antioxidant 3114 and 0.2% irgasfos 168,0.1% auxiliary anti-oxidant DSTP and 2% other auxiliary agents.
Comparative example 3
PP composite material main component of the present invention include 68.6% polypropylene, 8% toughener, 20% inorganic filler,
1% coupling agent, 0.1% antioxidant 3114 and 0.2% irgasfos 168,0.1% auxiliary anti-oxidant DSTP and 2% other auxiliary agents.
Comparative example 4
PP composite material main component of the present invention include 56.6% polypropylene, 10% toughener, 30% inorganic filler,
1% coupling agent, 0.1% antioxidant 3114 and 0.2% irgasfos 168,0.1% auxiliary anti-oxidant DSTP and 2% other auxiliary agents.
Embodiment and comparative example main component mass percentage are shown in Table 1.
1 embodiment 1-7 of table and comparative example 1-4 material prescription table (weight %)
In above-described embodiment and comparative example composite-material formula, the polypropylene is copolymer polypropylene, melt flows
Rate is 30g/10min.Toughener used is the ethylene-octene copolymer Engage8150 of DOW company, and density is
0.868g/cm3, melt index are 0.5g/10min (test condition: 190 DEG C × 2.16kg).The inorganic filler is talcum
Powder, mesh number are 1250 mesh, and average grain diameter is 10 μm.The hollow glass micropearl, average grain diameter are 20 μm, and bulk density is
0.425g/cm3.The barium sulfate crystal whisker draw ratio is 60.The coupling agent is the silicon that U.S. Dow Corning company produces
Alkane coupling agent, trade names Z-6011.The primary antioxidant is 3114 that BASF AG produces, trade names Irganox
3114, chemical name 3, the DSTP that 5- di-tert-butyl-4-hydroxyl benzyl diethyl phosphate and ICE company, Britain produce, commodity
The trade mark is Negonox DSTP, and chemical name is thio-2 acid octadecyl ester.Auxiliary anti-oxidant is 168 that BASF AG produces, commodity
The trade mark is Irgafos 168, and chemical name is three (2,4- di-tert-butyl-phenyl) phosphite esters.Other auxiliary agents include each
Kind color additives, light stabilizer, various esters or fatty acid lubricant etc..
Each resin and various additives are dry-mixed 3~5 minutes in super mixer in above-described embodiment and comparative example, then
Through melting extrusion in double screw extruder, it is granulated, technique are as follows: 190~200 DEG C of an area, two 200~210 DEG C of areas, three areas 210
~220 DEG C, four 205~215 DEG C of areas；The residence time of entire extrusion process is 1~2 minute, and pressure is 12~18MPa, exhaust
Vacuum degree reaches 5~20kPa.
The particulate material that will be prepared according to the above method, it is 2~3 hours dry in 90~100 DEG C of convection oven, then again
Dried particulate material is subjected to injection moulding sample preparation on injection (mo(u)lding) machine, and is tested for the property.
Density measurement: being carried out by ISO 1183-1 standard, and specimen size is 10 × 10 × 4mm；
Marresistance energy: according to germany volkswagen PV3952 standard carry out cross cross cut test, specimen size be 50 × 50 ×
3.2mm loads as 10N, the changes delta L of the color difference L value before and after lattice domain test is drawn with color difference meter measurement, Δ L value is smaller, shows
The Marresistance of material can be better；
Pressure mottling resistance energy: according to germany volkswagen PV3974 standard carry out disk scrape test, specimen size be 50 × 50 ×
3.2mm is loaded as 3N, is measured the glossiness before and after scraping domain test with vancometer and change DGG, DGG value is smaller, shows material
The pressure mottling resistance of material can be better；
The comprehensive performance of material can be judged by test density, Marresistance energy and pressure mottling resistance.The embodiment of the present invention 1
~7 and the performance test results of 1~4 PP composite material of comparative example be shown in Table 2 respectively.
2 embodiment 1-7 of table and comparative example 1-4 material property table
It can be seen that from the comparison of embodiment 1-7 and comparative example 1-4 in Inorganic Fillers Filled PP composite material system
In, it adds hollow glass micropearl and barium sulfate crystal whisker part substitutes inorganic filler, can effectively improve PP composite material body
The Marresistance of system can satisfy the requirement of germany volkswagen material standard with pressure mottling resistance energy；Meanwhile with hollow glass micropearl
It is obvious with the density decline of the introducing of barium sulfate crystal whisker, composite system, it plays a positive role to the lightweight of material.
Claims (12)
1. light-weighted resistance to scratching, resistance to compression trace PP composite material can be achieved in one kind, it is characterised in that: press following weight percent
The raw material of ratio is configured to:
2. light-weighted resistance to scratching, resistance to compression trace PP composite material, feature can be achieved in one kind according to claim 1
Be: for the polypropylene under 230 DEG C, 2.16kg loading condiction, melt flow rate (MFR) is 5~60g/10min.
3. light-weighted resistance to scratching, resistance to compression trace PP composite material, feature can be achieved in one kind according to claim 1
Be: the polypropylene is homo-polypropylene or block copolymerization propylene；The crystallinity of the homo-polypropylene is 70% or more, isotacticity
Greater than 99%；The comonomer of the block copolymerization polypropylene be ethylene, vinyl monomer repetitive unit molar content be 4~
10%.
4. light-weighted resistance to scratching, resistance to compression trace PP composite material, feature can be achieved in one kind according to claim 1
Be: the toughener is the combination of ethylene-octene linear copolymer or Ethylene/Butylene linear copolymer or both, close
Degree is 0.88~0.90g/cm3, melt flow rate (MFR) is 0.5~10g/10min.
5. light-weighted resistance to scratching, resistance to compression trace PP composite material, feature can be achieved in one kind according to claim 1
Be: the inorganic filler is one or both of talcum powder, calcium carbonate, mica, wollastonite and montmorillonite or more
Composition.
6. light-weighted resistance to scratching, resistance to compression trace PP composite material, feature can be achieved in one kind according to claim 1
Be: the hollow glass micropearl main component is borosilicate, and particle size range is 10~250 microns, bulk density
For 0.1~1g/cm3。
7. light-weighted resistance to scratching, resistance to compression trace PP composite material, feature can be achieved in one kind according to claim 1
Be: the barium sulfate crystal whisker is acicular texture, draw ratio 50-80.
8. light-weighted resistance to scratching, resistance to compression trace PP composite material, feature can be achieved in one kind according to claim 1
Be: the coupling agent is any one in silane coupling agent, titanate coupling agent and aluminate coupling agent.
9. light-weighted resistance to scratching, resistance to compression trace PP composite material, feature can be achieved in one kind according to claim 1
Be: the antioxidant includes primary antioxidant and auxiliary anti-oxidant, and primary antioxidant is hindered phenol or sulphur ester antioxidant；Auxiliary antioxygen
Agent is phosphorite kind antioxidant.
10. light-weighted resistance to scratching, resistance to compression trace PP composite material can be achieved in one kind according to claim 7, special
Sign is: the primary antioxidant is one or more of 3114,1010 and DSTP mixing；Auxiliary anti-oxidant is in 618 and 168
One or two.
11. light-weighted resistance to scratching, resistance to compression trace PP composite material can be achieved in one kind according to claim 1, special
Sign is: other described additives are in various colors additive, light stabilizer, various esters or fatty acid lubricant
It is one or more.
12. light-weighted resistance to scratching, the system of resistance to compression trace PP composite material can be achieved described in claim 1-11 is one of any
Preparation Method, it is characterised in that: the specific steps of which are as follows:
(1) raw material is weighed by above-mentioned weight proportion；
(2) each raw material is placed in super mixer and is mixed 3~5 minutes；
(3) mixed raw material is placed in dual-screw-stem machine, through melting extrusion, is granulated, technique are as follows: 190~200 DEG C of an area, two
200~210 DEG C of area, three 210~220 DEG C of areas, four 205~215 DEG C of areas；The residence time of entire extrusion process is 1~2 minute,
Pressure is 12~18MPa, and purging vacuum degree reaches 5~20kPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811610673.3A CN109735007A (en) | 2018-12-27 | 2018-12-27 | Light-weighted resistance to scratching, resistance to compression trace PP composite material and preparation method thereof can be achieved in one kind |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811610673.3A CN109735007A (en) | 2018-12-27 | 2018-12-27 | Light-weighted resistance to scratching, resistance to compression trace PP composite material and preparation method thereof can be achieved in one kind |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109735007A true CN109735007A (en) | 2019-05-10 |
Family
ID=66360150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811610673.3A Pending CN109735007A (en) | 2018-12-27 | 2018-12-27 | Light-weighted resistance to scratching, resistance to compression trace PP composite material and preparation method thereof can be achieved in one kind |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109735007A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111793275A (en) * | 2020-06-11 | 2020-10-20 | 金旸（厦门）新材料科技有限公司 | Special energy-saving high-gloss flame-retardant polypropylene composite material for intelligent closestool and preparation method thereof |
| CN113637261A (en) * | 2021-09-23 | 2021-11-12 | 广东腾熙科技咨询有限公司 | Scratch-resistant reinforced PP plastic and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103102592A (en) * | 2013-02-04 | 2013-05-15 | 北京海科华昌新材料技术有限公司 | Modified polypropylene material for automotive bumper and preparation method thereof |
| US20140187694A1 (en) * | 2012-12-27 | 2014-07-03 | Daeha Co., Ltd. | Polypropylene resin composition and interior and exterior materials for vehicles using the same |
| CN105602102A (en) * | 2015-12-30 | 2016-05-25 | 上海普利特复合材料股份有限公司 | Low-density, high-strength and scratch-resistant modified polypropylene composite material and preparation method thereof |
-
2018
- 2018-12-27 CN CN201811610673.3A patent/CN109735007A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140187694A1 (en) * | 2012-12-27 | 2014-07-03 | Daeha Co., Ltd. | Polypropylene resin composition and interior and exterior materials for vehicles using the same |
| CN103102592A (en) * | 2013-02-04 | 2013-05-15 | 北京海科华昌新材料技术有限公司 | Modified polypropylene material for automotive bumper and preparation method thereof |
| CN105602102A (en) * | 2015-12-30 | 2016-05-25 | 上海普利特复合材料股份有限公司 | Low-density, high-strength and scratch-resistant modified polypropylene composite material and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 贺曼罗编著: "《环氧树脂胶粘剂》", 30 April 2004, 中国石化出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111793275A (en) * | 2020-06-11 | 2020-10-20 | 金旸（厦门）新材料科技有限公司 | Special energy-saving high-gloss flame-retardant polypropylene composite material for intelligent closestool and preparation method thereof |
| CN113637261A (en) * | 2021-09-23 | 2021-11-12 | 广东腾熙科技咨询有限公司 | Scratch-resistant reinforced PP plastic and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101874918B1 (en) | Light-weight polypropylene resin composition and molded product of vehicle interior material using the same | |
| CN101659142B (en) | Multifunctional casting polyolefine firmness-increasing film | |
| CN103214740B (en) | Polypropylene composite material for automobile internal ornament, preparation method thereof and internal ornament | |
| CN107629314B (en) | Polypropylene composition and preparation method thereof | |
| CN101759913A (en) | Novel scratch-proof polypropylene material and preparation method thereof | |
| CN107501714B (en) | A kind of polypropene composition and preparation method thereof | |
| CN102108175B (en) | Low-gloss high-rigidity polypropylene compound material and preparation method thereof | |
| CN101759934B (en) | High-flowing high-tenacity and low-contractibility rate filling modified polypropylene material | |
| CN103059409A (en) | Low-odor low-volatilization modified polypropylene material and preparation method thereof | |
| WO2022110655A1 (en) | Conductive polypropylene composition and preparation method therefor | |
| CN109294185B (en) | Vehicle bumper material and preparation method and application thereof | |
| CN109679216A (en) | A kind of high rigid-tough balance, resistance to stress whiten, halogen-free flame retardant polypropylene composite material and preparation method thereof | |
| CN111171456A (en) | Polypropylene composite material and preparation method thereof | |
| CN105254999A (en) | Scratch-resistant high-impact polypropylene resin material and preparing method | |
| CN103788482A (en) | Polypropylene composite material having low VOC (Volatile Organic Compound) content and scratch resistance | |
| CN108276682A (en) | A kind of high fluidity polypropylene composite material with high strength and toughness and preparation method thereof | |
| CN105602102A (en) | Low-density, high-strength and scratch-resistant modified polypropylene composite material and preparation method thereof | |
| CN112457585A (en) | Polypropylene composition and preparation method thereof | |
| CN108102223A (en) | A kind of low coefficient of linear thermal expansion, imitative flocking effect PP composite material and preparation method thereof | |
| CN108059772A (en) | A kind of low smell, it is low distribute, high heat-resisting polypropylene composite material and preparation method thereof | |
| CN109735007A (en) | Light-weighted resistance to scratching, resistance to compression trace PP composite material and preparation method thereof can be achieved in one kind | |
| CN104558837A (en) | Scratching-resistant low-gloss polypropylene composite material and preparation method thereof | |
| CN102514330A (en) | PVC cladded polypropylene micro-foamed plastic and its preparation technology | |
| CN104558833B (en) | Good polypropylene modified material of a kind of scratch performance and preparation method thereof | |
| CN102532686A (en) | Low-gloss and scratch-resistant polypropylene material and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |